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--- /dev/null
+++ Libc/Libc-583/pthreads/pthread.c
@@ -0,0 +1,3394 @@
+/*
+ * Copyright (c) 2000-2008 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+/*
+ * Copyright 1996 1995 by Open Software Foundation, Inc. 1997 1996 1995 1994 1993 1992 1991
+ * All Rights Reserved
+ *
+ * Permission to use, copy, modify, and distribute this software and
+ * its documentation for any purpose and without fee is hereby granted,
+ * provided that the above copyright notice appears in all copies and
+ * that both the copyright notice and this permission notice appear in
+ * supporting documentation.
+ *
+ * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE.
+ *
+ * IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
+ * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
+ * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+/*
+ * MkLinux
+ */
+
+/*
+ * POSIX Pthread Library
+ */
+
+#include "pthread_internals.h"
+#include "pthread_workqueue.h"
+
+#include <assert.h>
+#include <stdio.h> /* For printf(). */
+#include <stdlib.h>
+#include <errno.h> /* For __mach_errno_addr() prototype. */
+#include <signal.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/sysctl.h>
+#include <sys/queue.h>
+#include <machine/vmparam.h>
+#include <mach/vm_statistics.h>
+#define __APPLE_API_PRIVATE
+#include <machine/cpu_capabilities.h>
+#include <libkern/OSAtomic.h>
+#if defined(__ppc__)
+#include <libkern/OSCrossEndian.h>
+#endif
+
+
+extern int _pthread_setcancelstate_internal(int state, int *oldstate, int conforming);
+extern int __pthread_sigmask(int, const sigset_t *, sigset_t *);
+
+#ifndef BUILDING_VARIANT /* [ */
+
+__private_extern__ struct __pthread_list __pthread_head = TAILQ_HEAD_INITIALIZER(__pthread_head);
+
+
+
+int32_t workq_targetconc[WORKQ_NUM_PRIOQUEUE];
+
+/* Per-thread kernel support */
+extern void _pthread_set_self(pthread_t);
+extern void mig_init(int);
+static int _pthread_create_pthread_onstack(pthread_attr_t *attrs, void **stack, pthread_t *thread);
+static kern_return_t _pthread_free_pthread_onstack(pthread_t t, int freestruct, int termthread);
+static void _pthread_struct_init(pthread_t t, const pthread_attr_t *attrs, void * stack, size_t stacksize, int kernalloc, int nozero);
+static void _pthread_tsd_reinit(pthread_t t);
+static int _new_pthread_create_suspended(pthread_t *thread,
+ const pthread_attr_t *attr,
+ void *(*start_routine)(void *),
+ void *arg,
+ int create_susp);
+
+/* Get CPU capabilities from the kernel */
+__private_extern__ void _init_cpu_capabilities(void);
+
+/* Needed to tell the malloc subsystem we're going multithreaded */
+extern void set_malloc_singlethreaded(int);
+
+/* Used when we need to call into the kernel with no reply port */
+extern pthread_lock_t reply_port_lock;
+int _pthread_find_thread(pthread_t thread);
+
+/* Mach message used to notify that a thread needs to be reaped */
+
+typedef struct _pthread_reap_msg_t {
+ mach_msg_header_t header;
+ pthread_t thread;
+ mach_msg_trailer_t trailer;
+} pthread_reap_msg_t;
+
+/* We'll implement this when the main thread is a pthread */
+/* Use the local _pthread struct to avoid malloc before our MiG reply port is set */
+static struct _pthread _thread = {0};
+
+/* This global should be used (carefully) by anyone needing to know if a
+** pthread has been created.
+*/
+int __is_threaded = 0;
+/* _pthread_count is protected by _pthread_list_lock */
+static int _pthread_count = 1;
+int __unix_conforming = 0;
+__private_extern__ size_t pthreadsize = 0;
+
+/* under rosetta we will use old style creation of threads */
+static int __oldstyle = 0;
+
+__private_extern__ pthread_lock_t _pthread_list_lock = LOCK_INITIALIZER;
+
+/* Same implementation as LOCK, but without the __is_threaded check */
+int _spin_tries = 0;
+extern kern_return_t syscall_thread_switch(mach_port_name_t, int, mach_msg_timeout_t);
+__private_extern__ void _spin_lock_retry(pthread_lock_t *lock)
+{
+ int tries = _spin_tries;
+ do {
+ if (tries-- > 0)
+ continue;
+ syscall_thread_switch(THREAD_NULL, SWITCH_OPTION_DEPRESS, 1);
+ tries = _spin_tries;
+ } while(!_spin_lock_try(lock));
+}
+
+extern mach_port_t thread_recycle_port;
+
+/* These are used to keep track of a semaphore pool shared by mutexes and condition
+** variables.
+*/
+
+static semaphore_t *sem_pool = NULL;
+static int sem_pool_count = 0;
+static int sem_pool_current = 0;
+static pthread_lock_t sem_pool_lock = LOCK_INITIALIZER;
+
+static int default_priority;
+static int max_priority;
+static int min_priority;
+static int pthread_concurrency;
+
+static OSSpinLock __workqueue_list_lock = OS_SPINLOCK_INIT;
+
+static void _pthread_exit(pthread_t self, void *value_ptr);
+static void _pthread_setcancelstate_exit(pthread_t self, void *value_ptr, int conforming);
+static pthread_attr_t _pthread_attr_default = {0};
+static void _pthread_workq_init(pthread_workqueue_t wq, const pthread_workqueue_attr_t * attr);
+static int kernel_workq_setup = 0;
+static volatile int32_t kernel_workq_count = 0;
+static volatile unsigned int user_workq_count = 0;
+#define KERNEL_WORKQ_ELEM_MAX 64 /* Max number of elements in the kerrel */
+static int wqreadyprio = 0; /* current highest prio queue ready with items */
+
+static int __pthread_workqueue_affinity = 1; /* 0 means no affinity */
+__private_extern__ struct __pthread_workitem_pool __pthread_workitem_pool_head = TAILQ_HEAD_INITIALIZER(__pthread_workitem_pool_head);
+__private_extern__ struct __pthread_workqueue_pool __pthread_workqueue_pool_head = TAILQ_HEAD_INITIALIZER(__pthread_workqueue_pool_head);
+
+struct _pthread_workqueue_head __pthread_workq0_head;
+struct _pthread_workqueue_head __pthread_workq1_head;
+struct _pthread_workqueue_head __pthread_workq2_head;
+pthread_workqueue_head_t __pthread_wq_head_tbl[WQ_NUM_PRIO_QS] = {&__pthread_workq0_head, &__pthread_workq1_head, &__pthread_workq2_head};
+
+static void workqueue_list_lock(void);
+static void workqueue_list_unlock(void);
+static int valid_workq(pthread_workqueue_t);
+static void pick_nextworkqueue_droplock(void);
+static int post_nextworkitem(pthread_workqueue_t workq);
+static void _pthread_workq_return(pthread_t self);
+static pthread_workqueue_attr_t _pthread_wq_attr_default = {0};
+extern void start_wqthread(pthread_t self, mach_port_t kport, void * stackaddr, pthread_workitem_t item, int reuse);
+extern void thread_start(pthread_t self, mach_port_t kport, void *(*fun)(void *), void * funarg, size_t stacksize, unsigned int flags);
+static pthread_workitem_t alloc_workitem(void);
+static void free_workitem(pthread_workitem_t);
+static pthread_workqueue_t alloc_workqueue(void);
+static void free_workqueue(pthread_workqueue_t);
+static int _pthread_work_internal_init(void);
+static void workqueue_exit(pthread_t self, pthread_workqueue_t workq, pthread_workitem_t item);
+
+void pthread_workqueue_atfork_prepare(void);
+void pthread_workqueue_atfork_parent(void);
+void pthread_workqueue_atfork_child(void);
+
+extern void dispatch_atfork_prepare(void);
+extern void dispatch_atfork_parent(void);
+extern void dispatch_atfork_child(void);
+
+/* workq_kernreturn commands */
+#define WQOPS_QUEUE_ADD 1
+#define WQOPS_QUEUE_REMOVE 2
+#define WQOPS_THREAD_RETURN 4
+#define WQOPS_THREAD_SETCONC 8
+
+/*
+ * Flags filed passed to bsdthread_create and back in pthread_start
+31 <---------------------------------> 0
+_________________________________________
+| flags(8) | policy(8) | importance(16) |
+-----------------------------------------
+*/
+__private_extern__
+void _pthread_start(pthread_t self, mach_port_t kport, void *(*fun)(void *), void * funarg, size_t stacksize, unsigned int flags);
+
+__private_extern__
+void _pthread_wqthread(pthread_t self, mach_port_t kport, void * stackaddr, pthread_workitem_t item, int reuse);
+
+#define PTHREAD_START_CUSTOM 0x01000000
+#define PTHREAD_START_SETSCHED 0x02000000
+#define PTHREAD_START_DETACHED 0x04000000
+#define PTHREAD_START_POLICY_BITSHIFT 16
+#define PTHREAD_START_POLICY_MASK 0xff
+#define PTHREAD_START_IMPORTANCE_MASK 0xffff
+
+static int pthread_setschedparam_internal(pthread_t, mach_port_t, int, const struct sched_param *);
+extern pthread_t __bsdthread_create(void *(*func)(void *), void * func_arg, void * stack, pthread_t thread, unsigned int flags);
+extern int __bsdthread_register(void (*)(pthread_t, mach_port_t, void *(*)(void *), void *, size_t, unsigned int), void (*)(pthread_t, mach_port_t, void *, pthread_workitem_t, int), int,void (*)(pthread_t, mach_port_t, void *(*)(void *), void *, size_t, unsigned int), void (*)(pthread_t, mach_port_t, void *, pthread_workitem_t, int),__uint64_t);
+extern int __bsdthread_terminate(void * freeaddr, size_t freesize, mach_port_t kport, mach_port_t joinsem);
+extern __uint64_t __thread_selfid( void );
+extern int __pthread_canceled(int);
+extern void _pthread_keys_init(void);
+extern int __pthread_kill(mach_port_t, int);
+extern int __pthread_markcancel(int);
+extern int __workq_open(void);
+
+#define WORKQUEUE_OVERCOMMIT 0x10000
+
+extern int __workq_kernreturn(int, pthread_workitem_t, int, int);
+
+#if defined(__ppc__) || defined(__ppc64__)
+static const vm_address_t PTHREAD_STACK_HINT = 0xF0000000;
+#elif defined(__i386__) || defined(__x86_64__)
+static const vm_address_t PTHREAD_STACK_HINT = 0xB0000000;
+#elif defined(__arm__)
+static const vm_address_t PTHREAD_STACK_HINT = 0x30000000;
+#else
+#error Need to define a stack address hint for this architecture
+#endif
+
+/* Set the base address to use as the stack pointer, before adjusting due to the ABI
+ * The guardpages for stackoverflow protection is also allocated here
+ * If the stack was already allocated(stackaddr in attr) then there are no guardpages
+ * set up for the thread
+ */
+
+static int
+_pthread_allocate_stack(pthread_attr_t *attrs, void **stack)
+{
+ kern_return_t kr;
+ vm_address_t stackaddr;
+ size_t guardsize;
+
+ assert(attrs->stacksize >= PTHREAD_STACK_MIN);
+ if (attrs->stackaddr != NULL) {
+ /* No guard pages setup in this case */
+ assert(((uintptr_t)attrs->stackaddr % vm_page_size) == 0);
+ *stack = attrs->stackaddr;
+ return 0;
+ }
+
+ guardsize = attrs->guardsize;
+ stackaddr = PTHREAD_STACK_HINT;
+ kr = vm_map(mach_task_self(), &stackaddr,
+ attrs->stacksize + guardsize,
+ vm_page_size-1,
+ VM_MAKE_TAG(VM_MEMORY_STACK)| VM_FLAGS_ANYWHERE , MEMORY_OBJECT_NULL,
+ 0, FALSE, VM_PROT_DEFAULT, VM_PROT_ALL,
+ VM_INHERIT_DEFAULT);
+ if (kr != KERN_SUCCESS)
+ kr = vm_allocate(mach_task_self(),
+ &stackaddr, attrs->stacksize + guardsize,
+ VM_MAKE_TAG(VM_MEMORY_STACK)| VM_FLAGS_ANYWHERE);
+ if (kr != KERN_SUCCESS) {
+ return EAGAIN;
+ }
+ /* The guard page is at the lowest address */
+ /* The stack base is the highest address */
+ if (guardsize)
+ kr = vm_protect(mach_task_self(), stackaddr, guardsize, FALSE, VM_PROT_NONE);
+ *stack = (void *)(stackaddr + attrs->stacksize + guardsize);
+ return 0;
+}
+
+static int
+_pthread_create_pthread_onstack(pthread_attr_t *attrs, void **stack, pthread_t *thread)
+{
+ kern_return_t kr;
+ pthread_t t;
+ vm_address_t stackaddr;
+ size_t guardsize, allocsize;
+
+ assert(attrs->stacksize >= PTHREAD_STACK_MIN);
+
+ if (attrs->stackaddr != NULL) {
+ /* No guard pages setup in this case */
+ assert(((uintptr_t)attrs->stackaddr % vm_page_size) == 0);
+ *stack = attrs->stackaddr;
+ t = (pthread_t)malloc(pthreadsize);
+ _pthread_struct_init(t, attrs, attrs->stackaddr, 0, 0, 0);
+ t->freeStackOnExit = 0;
+ t->freeaddr = 0;
+ t->freesize = 0;
+ *thread = t;
+ return 0;
+ }
+
+ guardsize = attrs->guardsize;
+ allocsize = attrs->stacksize + guardsize + pthreadsize;
+ stackaddr = PTHREAD_STACK_HINT;
+ kr = vm_map(mach_task_self(), &stackaddr,
+ allocsize,
+ vm_page_size-1,
+ VM_MAKE_TAG(VM_MEMORY_STACK)| VM_FLAGS_ANYWHERE , MEMORY_OBJECT_NULL,
+ 0, FALSE, VM_PROT_DEFAULT, VM_PROT_ALL,
+ VM_INHERIT_DEFAULT);
+ if (kr != KERN_SUCCESS)
+ kr = vm_allocate(mach_task_self(),
+ &stackaddr, allocsize,
+ VM_MAKE_TAG(VM_MEMORY_STACK)| VM_FLAGS_ANYWHERE);
+ if (kr != KERN_SUCCESS) {
+ return EAGAIN;
+ }
+ /* The guard page is at the lowest address */
+ /* The stack base is the highest address */
+ if (guardsize)
+ kr = vm_protect(mach_task_self(), stackaddr, guardsize, FALSE, VM_PROT_NONE);
+
+
+ *stack = (void *)(stackaddr + attrs->stacksize + guardsize);
+
+ t = (pthread_t)(stackaddr + attrs->stacksize + guardsize);
+ _pthread_struct_init(t, attrs, *stack, 0, 0, 1);
+ t->kernalloc = 0;
+ t->freesize = allocsize;
+ t->freeaddr = (void *)stackaddr;
+ t->freeStackOnExit = 1;
+ *thread = t;
+
+ return 0;
+}
+
+static kern_return_t
+_pthread_free_pthread_onstack(pthread_t t, int freestruct, int termthread)
+{
+ kern_return_t res = 0;
+ vm_address_t freeaddr;
+ size_t freesize;
+ task_t self = mach_task_self();
+ int thread_count;
+ mach_port_t kport;
+ semaphore_t joinsem = SEMAPHORE_NULL;
+
+#if PTH_TRACE
+ __kdebug_trace(0x900001c, freestruct, termthread, 0, 0, 0);
+#endif
+ kport = t->kernel_thread;
+ joinsem = t->joiner_notify;
+
+ if (t->freeStackOnExit) {
+ freeaddr = (vm_address_t)t->freeaddr;
+ if (freestruct)
+ freesize = t->stacksize + t->guardsize + pthreadsize;
+ else
+ freesize = t->stacksize + t->guardsize;
+ if (termthread) {
+ mig_dealloc_reply_port(MACH_PORT_NULL);
+ LOCK(_pthread_list_lock);
+ if (freestruct != 0) {
+ TAILQ_REMOVE(&__pthread_head, t, plist);
+ /* if parent has not returned from create yet keep pthread_t */
+#if PTH_LISTTRACE
+ __kdebug_trace(0x9000010, t, 0, 0, 1, 0);
+#endif
+ if (t->parentcheck == 0)
+ freesize -= pthreadsize;
+ }
+ t->childexit = 1;
+ thread_count = --_pthread_count;
+ UNLOCK(_pthread_list_lock);
+
+#if PTH_TRACE
+ __kdebug_trace(0x9000020, freeaddr, freesize, kport, 1, 0);
+#endif
+ if (thread_count <=0)
+ exit(0);
+ else
+ __bsdthread_terminate((void *)freeaddr, freesize, kport, joinsem);
+ LIBC_ABORT("thread %p didn't terminate", t);
+ } else {
+#if PTH_TRACE
+ __kdebug_trace(0x9000024, freeaddr, freesize, 0, 1, 0);
+#endif
+ res = vm_deallocate(mach_task_self(), freeaddr, freesize);
+ }
+ } else {
+ if (termthread) {
+ mig_dealloc_reply_port(MACH_PORT_NULL);
+ LOCK(_pthread_list_lock);
+ if (freestruct != 0) {
+ TAILQ_REMOVE(&__pthread_head, t, plist);
+#if PTH_LISTTRACE
+ __kdebug_trace(0x9000010, t, 0, 0, 2, 0);
+#endif
+ }
+ thread_count = --_pthread_count;
+ t->childexit = 1;
+ UNLOCK(_pthread_list_lock);
+
+ if (freestruct) {
+#if PTH_TRACE
+ __kdebug_trace(0x9000008, t, 0, 0, 2, 0);
+#endif
+ free(t);
+ }
+
+ freeaddr = 0;
+ freesize = 0;
+#if PTH_TRACE
+ __kdebug_trace(0x9000020, 0, 0, kport, 2, 0);
+#endif
+
+ if (thread_count <=0)
+ exit(0);
+ else
+ __bsdthread_terminate(NULL, 0, kport, joinsem);
+ LIBC_ABORT("thread %p didn't terminate", t);
+ } else if (freestruct) {
+ t->sig = _PTHREAD_NO_SIG;
+#if PTH_TRACE
+ __kdebug_trace(0x9000024, t, 0, 0, 2, 0);
+#endif
+ free(t);
+ }
+ }
+ return(res);
+}
+
+
+
+/*
+ * Destroy a thread attribute structure
+ */
+int
+pthread_attr_destroy(pthread_attr_t *attr)
+{
+ if (attr->sig == _PTHREAD_ATTR_SIG)
+ {
+ attr->sig = 0;
+ return (0);
+ } else
+ {
+ return (EINVAL); /* Not an attribute structure! */
+ }
+}
+
+/*
+ * Get the 'detach' state from a thread attribute structure.
+ * Note: written as a helper function for info hiding
+ */
+int
+pthread_attr_getdetachstate(const pthread_attr_t *attr,
+ int *detachstate)
+{
+ if (attr->sig == _PTHREAD_ATTR_SIG)
+ {
+ *detachstate = attr->detached;
+ return (0);
+ } else
+ {
+ return (EINVAL); /* Not an attribute structure! */
+ }
+}
+
+/*
+ * Get the 'inherit scheduling' info from a thread attribute structure.
+ * Note: written as a helper function for info hiding
+ */
+int
+pthread_attr_getinheritsched(const pthread_attr_t *attr,
+ int *inheritsched)
+{
+ if (attr->sig == _PTHREAD_ATTR_SIG)
+ {
+ *inheritsched = attr->inherit;
+ return (0);
+ } else
+ {
+ return (EINVAL); /* Not an attribute structure! */
+ }
+}
+
+/*
+ * Get the scheduling parameters from a thread attribute structure.
+ * Note: written as a helper function for info hiding
+ */
+int
+pthread_attr_getschedparam(const pthread_attr_t *attr,
+ struct sched_param *param)
+{
+ if (attr->sig == _PTHREAD_ATTR_SIG)
+ {
+ *param = attr->param;
+ return (0);
+ } else
+ {
+ return (EINVAL); /* Not an attribute structure! */
+ }
+}
+
+/*
+ * Get the scheduling policy from a thread attribute structure.
+ * Note: written as a helper function for info hiding
+ */
+int
+pthread_attr_getschedpolicy(const pthread_attr_t *attr,
+ int *policy)
+{
+ if (attr->sig == _PTHREAD_ATTR_SIG)
+ {
+ *policy = attr->policy;
+ return (0);
+ } else
+ {
+ return (EINVAL); /* Not an attribute structure! */
+ }
+}
+
+/* Retain the existing stack size of 512K and not depend on Main thread default stack size */
+static const size_t DEFAULT_STACK_SIZE = (512*1024);
+/*
+ * Initialize a thread attribute structure to default values.
+ */
+int
+pthread_attr_init(pthread_attr_t *attr)
+{
+ attr->stacksize = DEFAULT_STACK_SIZE;
+ attr->stackaddr = NULL;
+ attr->sig = _PTHREAD_ATTR_SIG;
+ attr->param.sched_priority = default_priority;
+ attr->param.quantum = 10; /* quantum isn't public yet */
+ attr->detached = PTHREAD_CREATE_JOINABLE;
+ attr->inherit = _PTHREAD_DEFAULT_INHERITSCHED;
+ attr->policy = _PTHREAD_DEFAULT_POLICY;
+ attr->freeStackOnExit = 1;
+ attr->fastpath = 1;
+ attr->schedset = 0;
+ attr->guardsize = vm_page_size;
+ return (0);
+}
+
+/*
+ * Set the 'detach' state in a thread attribute structure.
+ * Note: written as a helper function for info hiding
+ */
+int
+pthread_attr_setdetachstate(pthread_attr_t *attr,
+ int detachstate)
+{
+ if (attr->sig == _PTHREAD_ATTR_SIG)
+ {
+ if ((detachstate == PTHREAD_CREATE_JOINABLE) ||
+ (detachstate == PTHREAD_CREATE_DETACHED))
+ {
+ attr->detached = detachstate;
+ return (0);
+ } else
+ {
+ return (EINVAL);
+ }
+ } else
+ {
+ return (EINVAL); /* Not an attribute structure! */
+ }
+}
+
+/*
+ * Set the 'inherit scheduling' state in a thread attribute structure.
+ * Note: written as a helper function for info hiding
+ */
+int
+pthread_attr_setinheritsched(pthread_attr_t *attr,
+ int inheritsched)
+{
+ if (attr->sig == _PTHREAD_ATTR_SIG)
+ {
+ if ((inheritsched == PTHREAD_INHERIT_SCHED) ||
+ (inheritsched == PTHREAD_EXPLICIT_SCHED))
+ {
+ attr->inherit = inheritsched;
+ return (0);
+ } else
+ {
+ return (EINVAL);
+ }
+ } else
+ {
+ return (EINVAL); /* Not an attribute structure! */
+ }
+}
+
+/*
+ * Set the scheduling paramters in a thread attribute structure.
+ * Note: written as a helper function for info hiding
+ */
+int
+pthread_attr_setschedparam(pthread_attr_t *attr,
+ const struct sched_param *param)
+{
+ if (attr->sig == _PTHREAD_ATTR_SIG)
+ {
+ /* TODO: Validate sched_param fields */
+ attr->param = *param;
+ attr->schedset = 1;
+ return (0);
+ } else
+ {
+ return (EINVAL); /* Not an attribute structure! */
+ }
+}
+
+/*
+ * Set the scheduling policy in a thread attribute structure.
+ * Note: written as a helper function for info hiding
+ */
+int
+pthread_attr_setschedpolicy(pthread_attr_t *attr,
+ int policy)
+{
+ if (attr->sig == _PTHREAD_ATTR_SIG)
+ {
+ if ((policy == SCHED_OTHER) ||
+ (policy == SCHED_RR) ||
+ (policy == SCHED_FIFO))
+ {
+ attr->policy = policy;
+ attr->schedset = 1;
+ return (0);
+ } else
+ {
+ return (EINVAL);
+ }
+ } else
+ {
+ return (EINVAL); /* Not an attribute structure! */
+ }
+}
+
+/*
+ * Set the scope for the thread.
+ * We currently only provide PTHREAD_SCOPE_SYSTEM
+ */
+int
+pthread_attr_setscope(pthread_attr_t *attr,
+ int scope)
+{
+ if (attr->sig == _PTHREAD_ATTR_SIG) {
+ if (scope == PTHREAD_SCOPE_SYSTEM) {
+ /* No attribute yet for the scope */
+ return (0);
+ } else if (scope == PTHREAD_SCOPE_PROCESS) {
+ return (ENOTSUP);
+ }
+ }
+ return (EINVAL); /* Not an attribute structure! */
+}
+
+/*
+ * Get the scope for the thread.
+ * We currently only provide PTHREAD_SCOPE_SYSTEM
+ */
+int
+pthread_attr_getscope(const pthread_attr_t *attr,
+ int *scope)
+{
+ if (attr->sig == _PTHREAD_ATTR_SIG) {
+ *scope = PTHREAD_SCOPE_SYSTEM;
+ return (0);
+ }
+ return (EINVAL); /* Not an attribute structure! */
+}
+
+/* Get the base stack address of the given thread */
+int
+pthread_attr_getstackaddr(const pthread_attr_t *attr, void **stackaddr)
+{
+ if (attr->sig == _PTHREAD_ATTR_SIG) {
+ *stackaddr = attr->stackaddr;
+ return (0);
+ } else {
+ return (EINVAL); /* Not an attribute structure! */
+ }
+}
+
+int
+pthread_attr_setstackaddr(pthread_attr_t *attr, void *stackaddr)
+{
+ if ((attr->sig == _PTHREAD_ATTR_SIG) && (((uintptr_t)stackaddr % vm_page_size) == 0)) {
+ attr->stackaddr = stackaddr;
+ attr->freeStackOnExit = 0;
+ attr->fastpath = 0;
+ return (0);
+ } else {
+ return (EINVAL); /* Not an attribute structure! */
+ }
+}
+
+int
+pthread_attr_getstacksize(const pthread_attr_t *attr, size_t *stacksize)
+{
+ if (attr->sig == _PTHREAD_ATTR_SIG) {
+ *stacksize = attr->stacksize;
+ return (0);
+ } else {
+ return (EINVAL); /* Not an attribute structure! */
+ }
+}
+
+int
+pthread_attr_setstacksize(pthread_attr_t *attr, size_t stacksize)
+{
+ if ((attr->sig == _PTHREAD_ATTR_SIG) && ((stacksize % vm_page_size) == 0) && (stacksize >= PTHREAD_STACK_MIN)) {
+ attr->stacksize = stacksize;
+ return (0);
+ } else {
+ return (EINVAL); /* Not an attribute structure! */
+ }
+}
+
+int
+pthread_attr_getstack(const pthread_attr_t *attr, void **stackaddr, size_t * stacksize)
+{
+ if (attr->sig == _PTHREAD_ATTR_SIG) {
+ *stackaddr = (void *)((uintptr_t)attr->stackaddr - attr->stacksize);
+ *stacksize = attr->stacksize;
+ return (0);
+ } else {
+ return (EINVAL); /* Not an attribute structure! */
+ }
+}
+
+/* By SUSV spec, the stackaddr is the base address, the lowest addressable
+ * byte address. This is not the same as in pthread_attr_setstackaddr.
+ */
+int
+pthread_attr_setstack(pthread_attr_t *attr, void *stackaddr, size_t stacksize)
+{
+ if ((attr->sig == _PTHREAD_ATTR_SIG) &&
+ (((uintptr_t)stackaddr % vm_page_size) == 0) &&
+ ((stacksize % vm_page_size) == 0) && (stacksize >= PTHREAD_STACK_MIN)) {
+ attr->stackaddr = (void *)((uintptr_t)stackaddr + stacksize);
+ attr->stacksize = stacksize;
+ attr->freeStackOnExit = 0;
+ attr->fastpath = 0;
+ return (0);
+ } else {
+ return (EINVAL); /* Not an attribute structure! */
+ }
+}
+
+
+/*
+ * Set the guardsize attribute in the attr.
+ */
+int
+pthread_attr_setguardsize(pthread_attr_t *attr,
+ size_t guardsize)
+{
+ if (attr->sig == _PTHREAD_ATTR_SIG) {
+ /* Guardsize of 0 is valid, ot means no guard */
+ if ((guardsize % vm_page_size) == 0) {
+ attr->guardsize = guardsize;
+ attr->fastpath = 0;
+ return (0);
+ } else
+ return(EINVAL);
+ }
+ return (EINVAL); /* Not an attribute structure! */
+}
+
+/*
+ * Get the guardsize attribute in the attr.
+ */
+int
+pthread_attr_getguardsize(const pthread_attr_t *attr,
+ size_t *guardsize)
+{
+ if (attr->sig == _PTHREAD_ATTR_SIG) {
+ *guardsize = attr->guardsize;
+ return (0);
+ }
+ return (EINVAL); /* Not an attribute structure! */
+}
+
+
+/*
+ * Create and start execution of a new thread.
+ */
+
+static void
+_pthread_body(pthread_t self)
+{
+ _pthread_set_self(self);
+ _pthread_exit(self, (self->fun)(self->arg));
+}
+
+void
+_pthread_start(pthread_t self, mach_port_t kport, void *(*fun)(void *), void * funarg, size_t stacksize, unsigned int pflags)
+{
+ int ret;
+#if WQ_DEBUG
+ pthread_t pself;
+#endif
+ pthread_attr_t *attrs = &_pthread_attr_default;
+ char * stackaddr;
+
+ if ((pflags & PTHREAD_START_CUSTOM) == 0) {
+ stackaddr = (char *)self;
+ _pthread_struct_init(self, attrs, stackaddr, stacksize, 1, 1);
+ #if defined(__i386__) || defined(__x86_64__)
+ _pthread_set_self(self);
+ #endif
+ LOCK(_pthread_list_lock);
+ if (pflags & PTHREAD_START_SETSCHED) {
+ self->policy = ((pflags >> PTHREAD_START_POLICY_BITSHIFT) & PTHREAD_START_POLICY_MASK);
+ self->param.sched_priority = (pflags & PTHREAD_START_IMPORTANCE_MASK);
+ }
+ /* These are not joinable threads */
+ if ((pflags & PTHREAD_START_DETACHED) == PTHREAD_START_DETACHED) {
+ self->detached &= ~PTHREAD_CREATE_JOINABLE;
+ self->detached |= PTHREAD_CREATE_DETACHED;
+ }
+ } else {
+ #if defined(__i386__) || defined(__x86_64__)
+ _pthread_set_self(self);
+ #endif
+ LOCK(_pthread_list_lock);
+ }
+ self->kernel_thread = kport;
+ self->fun = fun;
+ self->arg = funarg;
+
+ /* Add to the pthread list */
+ if (self->parentcheck == 0) {
+ TAILQ_INSERT_TAIL(&__pthread_head, self, plist);
+#if PTH_LISTTRACE
+ __kdebug_trace(0x900000c, self, 0, 0, 3, 0);
+#endif
+ _pthread_count++;
+ }
+ self->childrun = 1;
+ UNLOCK(_pthread_list_lock);
+
+#if defined(__i386__) || defined(__x86_64__) || defined(__arm__)
+ if( (self->thread_id = __thread_selfid()) == (__uint64_t)-1)
+ printf("Failed to set thread_id in pthread_start\n");
+#endif
+
+#if WQ_DEBUG
+ pself = pthread_self();
+ if (self != pself)
+ LIBC_ABORT("self %p != pself %p", self, pself);
+#endif
+#if PTH_TRACE
+ __kdebug_trace(0x9000030, self, pflags, 0, 0, 0);
+#endif
+
+ _pthread_exit(self, (self->fun)(self->arg));
+}
+
+int
+_pthread_create(pthread_t t,
+ const pthread_attr_t *attrs,
+ void *stack,
+ const mach_port_t kernel_thread)
+{
+ int res;
+ res = 0;
+
+ do
+ {
+ memset(t, 0, sizeof(*t));
+ t->newstyle = 0;
+ t->schedset = 0;
+ t->kernalloc = 0;
+ t->tsd[0] = t;
+ t->max_tsd_key = 0;
+ t->wqthread = 0;
+ t->cur_workq = 0;
+ t->cur_workitem = 0;
+ t->stacksize = attrs->stacksize;
+ t->stackaddr = (void *)stack;
+ t->guardsize = attrs->guardsize;
+ t->kernel_thread = kernel_thread;
+ t->detached = attrs->detached;
+ t->inherit = attrs->inherit;
+ t->policy = attrs->policy;
+ t->param = attrs->param;
+ t->freeStackOnExit = attrs->freeStackOnExit;
+ t->mutexes = (struct _pthread_mutex *)NULL;
+ t->sig = _PTHREAD_SIG;
+ t->reply_port = MACH_PORT_NULL;
+ t->cthread_self = NULL;
+ LOCK_INIT(t->lock);
+ t->plist.tqe_next = (struct _pthread *)0;
+ t->plist.tqe_prev = (struct _pthread **)0;
+ t->cancel_state = PTHREAD_CANCEL_ENABLE | PTHREAD_CANCEL_DEFERRED;
+ t->__cleanup_stack = (struct __darwin_pthread_handler_rec *)NULL;
+ t->death = SEMAPHORE_NULL;
+
+ if (kernel_thread != MACH_PORT_NULL)
+ (void)pthread_setschedparam_internal(t, kernel_thread, t->policy, &t->param);
+ } while (0);
+ return (res);
+}
+
+void
+_pthread_struct_init(pthread_t t, const pthread_attr_t *attrs, void * stack, size_t stacksize, int kernalloc, int nozero)
+{
+ mach_vm_offset_t stackaddr = (mach_vm_offset_t)(long)stack;
+
+ if (nozero == 0) {
+ memset(t, 0, sizeof(*t));
+ t->plist.tqe_next = (struct _pthread *)0;
+ t->plist.tqe_prev = (struct _pthread **)0;
+ }
+ t->schedset = attrs->schedset;
+ t->tsd[0] = t;
+ if (kernalloc != 0) {
+ stackaddr = (mach_vm_offset_t)(long)t;
+
+ /* if allocated from kernel set values appropriately */
+ t->stacksize = stacksize;
+ t->stackaddr = (void *)(long)stackaddr;
+ t->freeStackOnExit = 1;
+ t->freeaddr = (void *)(long)(stackaddr - stacksize - vm_page_size);
+ t->freesize = pthreadsize + stacksize + vm_page_size;
+ } else {
+ t->stacksize = attrs->stacksize;
+ t->stackaddr = (void *)stack;
+ }
+ t->guardsize = attrs->guardsize;
+ t->detached = attrs->detached;
+ t->inherit = attrs->inherit;
+ t->policy = attrs->policy;
+ t->param = attrs->param;
+ t->mutexes = (struct _pthread_mutex *)NULL;
+ t->sig = _PTHREAD_SIG;
+ t->reply_port = MACH_PORT_NULL;
+ t->cthread_self = NULL;
+ LOCK_INIT(t->lock);
+ t->cancel_state = PTHREAD_CANCEL_ENABLE | PTHREAD_CANCEL_DEFERRED;
+ t->__cleanup_stack = (struct __darwin_pthread_handler_rec *)NULL;
+ t->death = SEMAPHORE_NULL;
+ t->newstyle = 1;
+ t->kernalloc = kernalloc;
+ t->wqthread = 0;
+ t->cur_workq = 0;
+ t->cur_workitem = 0;
+ t->max_tsd_key = 0;
+}
+
+static void
+_pthread_tsd_reinit(pthread_t t)
+{
+ bzero(&t->tsd[1], (_INTERNAL_POSIX_THREAD_KEYS_END-1) * sizeof(void *));
+}
+
+
+/* Need to deprecate this in future */
+int
+_pthread_is_threaded(void)
+{
+ return __is_threaded;
+}
+
+/* Non portable public api to know whether this process has(had) atleast one thread
+ * apart from main thread. There could be race if there is a thread in the process of
+ * creation at the time of call . It does not tell whether there are more than one thread
+ * at this point of time.
+ */
+int
+pthread_is_threaded_np(void)
+{
+ return (__is_threaded);
+}
+
+mach_port_t
+pthread_mach_thread_np(pthread_t t)
+{
+ mach_port_t kport = MACH_PORT_NULL;
+
+ if (t == NULL)
+ goto out;
+
+ /*
+ * If the call is on self, return the kernel port. We cannot
+ * add this bypass for main thread as it might have exited,
+ * and we should not return stale port info.
+ */
+ if (t == pthread_self())
+ {
+ kport = t->kernel_thread;
+ goto out;
+ }
+
+ if (_pthread_lookup_thread(t, &kport, 0) != 0)
+ return((mach_port_t)0);
+
+out:
+ return(kport);
+}
+
+pthread_t pthread_from_mach_thread_np(mach_port_t kernel_thread)
+{
+ struct _pthread * p = NULL;
+
+ /* No need to wait as mach port is already known */
+ LOCK(_pthread_list_lock);
+ TAILQ_FOREACH(p, &__pthread_head, plist) {
+ if (p->kernel_thread == kernel_thread)
+ break;
+ }
+ UNLOCK(_pthread_list_lock);
+ return p;
+}
+
+size_t
+pthread_get_stacksize_np(pthread_t t)
+{
+ int ret,nestingDepth=0;
+ size_t size = 0;
+ vm_address_t address=0;
+ vm_size_t region_size=0;
+ struct vm_region_submap_info_64 info;
+ mach_msg_type_number_t count;
+
+ if (t == NULL)
+ return(ESRCH);
+
+ if ( t == pthread_self() || t == &_thread ) //since the main thread will not get de-allocated from underneath us
+ {
+ size=t->stacksize;
+ return size;
+ }
+
+
+ LOCK(_pthread_list_lock);
+
+ if ((ret = _pthread_find_thread(t)) != 0) {
+ UNLOCK(_pthread_list_lock);
+ return(ret);
+ }
+
+ size=t->stacksize;
+ UNLOCK(_pthread_list_lock);
+
+ return(size);
+}
+
+void *
+pthread_get_stackaddr_np(pthread_t t)
+{
+ int ret;
+ void * addr = NULL;
+
+ if (t == NULL)
+ return((void *)(long)ESRCH);
+
+ if(t == pthread_self() || t == &_thread) //since the main thread will not get deallocated from underneath us
+ return t->stackaddr;
+
+ LOCK(_pthread_list_lock);
+
+ if ((ret = _pthread_find_thread(t)) != 0) {
+ UNLOCK(_pthread_list_lock);
+ return((void *)(long)ret);
+ }
+ addr = t->stackaddr;
+ UNLOCK(_pthread_list_lock);
+
+ return(addr);
+}
+
+mach_port_t
+_pthread_reply_port(pthread_t t)
+{
+ return t->reply_port;
+}
+
+
+/* returns non-zero if the current thread is the main thread */
+int
+pthread_main_np(void)
+{
+ pthread_t self = pthread_self();
+
+ return ((self->detached & _PTHREAD_CREATE_PARENT) == _PTHREAD_CREATE_PARENT);
+}
+
+
+#if defined(__i386__) || defined(__x86_64__) || defined(__arm__)
+/* if we are passed in a pthread_t that is NULL, then we return
+ the current thread's thread_id. So folks don't have to call
+ pthread_self, in addition to us doing it, if they just want
+ their thread_id.
+*/
+int
+pthread_threadid_np(pthread_t thread, __uint64_t *thread_id)
+{
+ int rval=0;
+ pthread_t self = pthread_self();
+
+ if (thread_id == NULL) {
+ return(EINVAL);
+ } else if (thread == NULL || thread == self) {
+ *thread_id = self->thread_id;
+ return rval;
+ }
+
+ LOCK(_pthread_list_lock);
+ if ((rval = _pthread_find_thread(thread)) != 0) {
+ UNLOCK(_pthread_list_lock);
+ return(rval);
+ }
+ *thread_id = thread->thread_id;
+ UNLOCK(_pthread_list_lock);
+ return rval;
+}
+#endif
+
+int
+pthread_getname_np(pthread_t thread, char *threadname, size_t len)
+{
+ int rval;
+ rval = 0;
+
+ if (thread == NULL)
+ return(ESRCH);
+
+ LOCK(_pthread_list_lock);
+ if ((rval = _pthread_find_thread(thread)) != 0) {
+ UNLOCK(_pthread_list_lock);
+ return(rval);
+ }
+ strlcpy(threadname, thread->pthread_name, len);
+ UNLOCK(_pthread_list_lock);
+ return rval;
+}
+
+int
+pthread_setname_np(const char *threadname)
+{
+ int rval;
+ size_t len;
+
+ rval = 0;
+ len = strlen(threadname);
+ rval = sysctlbyname("kern.threadname", NULL, 0, threadname, len);
+ if(rval == 0)
+ {
+ strlcpy((pthread_self())->pthread_name, threadname, len+1);
+ }
+ return rval;
+
+}
+
+static int
+_new_pthread_create_suspended(pthread_t *thread,
+ const pthread_attr_t *attr,
+ void *(*start_routine)(void *),
+ void *arg,
+ int create_susp)
+{
+ pthread_attr_t *attrs;
+ void *stack;
+ int error;
+ unsigned int flags;
+ pthread_t t,t2;
+ kern_return_t kern_res;
+ mach_port_t kernel_thread = MACH_PORT_NULL;
+ int needresume;
+ task_t self = mach_task_self();
+ int kernalloc = 0;
+ int susp = create_susp;
+
+ if ((attrs = (pthread_attr_t *)attr) == (pthread_attr_t *)NULL)
+ { /* Set up default paramters */
+ attrs = &_pthread_attr_default;
+ } else if (attrs->sig != _PTHREAD_ATTR_SIG) {
+ return EINVAL;
+ }
+ error = 0;
+
+ if (((attrs->policy != _PTHREAD_DEFAULT_POLICY) ||
+ (attrs->param.sched_priority != default_priority)) && (create_susp == 0)) {
+ needresume = 1;
+ susp = 1;
+ } else
+ needresume = 0;
+
+ /* In default policy (ie SCHED_OTHER) only sched_priority is used. Check for
+ * any change in priority or policy is needed here.
+ */
+ if ((__oldstyle == 1) || (create_susp != 0)) {
+ /* Rosetta or pthread_create_suspended() */
+ /* running under rosetta */
+ /* Allocate a stack for the thread */
+#if PTH_TRACE
+ __kdebug_trace(0x9000000, create_susp, 0, 0, 0, 0);
+#endif
+ if ((error = _pthread_allocate_stack(attrs, &stack)) != 0) {
+ return(error);
+ }
+ t = (pthread_t)malloc(sizeof(struct _pthread));
+ *thread = t;
+ if (susp) {
+ /* Create the Mach thread for this thread */
+ PTHREAD_MACH_CALL(thread_create(self, &kernel_thread), kern_res);
+ if (kern_res != KERN_SUCCESS)
+ {
+ printf("Can't create thread: %d\n", kern_res);
+ return(EINVAL);
+ }
+ }
+ if ((error = _pthread_create(t, attrs, stack, kernel_thread)) != 0)
+ {
+ return(error);
+ }
+ set_malloc_singlethreaded(0);
+ __is_threaded = 1;
+
+ /* Send it on it's way */
+ t->arg = arg;
+ t->fun = start_routine;
+ t->newstyle = 0;
+ /* Now set it up to execute */
+ LOCK(_pthread_list_lock);
+ TAILQ_INSERT_TAIL(&__pthread_head, t, plist);
+#if PTH_LISTTRACE
+ __kdebug_trace(0x900000c, t, 0, 0, 4, 0);
+#endif
+ _pthread_count++;
+ UNLOCK(_pthread_list_lock);
+ _pthread_setup(t, _pthread_body, stack, susp, needresume);
+ return(0);
+ } else {
+
+ flags = 0;
+ if (attrs->fastpath == 1)
+ kernalloc = 1;
+
+ if (attrs->detached == PTHREAD_CREATE_DETACHED)
+ flags |= PTHREAD_START_DETACHED;
+ if (attrs->schedset != 0) {
+ flags |= PTHREAD_START_SETSCHED;
+ flags |= ((attrs->policy & PTHREAD_START_POLICY_MASK) << PTHREAD_START_POLICY_BITSHIFT);
+ flags |= (attrs->param.sched_priority & PTHREAD_START_IMPORTANCE_MASK);
+ }
+
+ set_malloc_singlethreaded(0);
+ __is_threaded = 1;
+
+ if (kernalloc == 0) {
+ /* Allocate a stack for the thread */
+ flags |= PTHREAD_START_CUSTOM;
+ if ((error = _pthread_create_pthread_onstack(attrs, &stack, &t)) != 0) {
+ return(error);
+ }
+ /* Send it on it's way */
+ t->arg = arg;
+ t->fun = start_routine;
+ t->newstyle = 1;
+
+#if PTH_TRACE
+ __kdebug_trace(0x9000004, t, flags, 0, 0, 0);
+#endif
+
+ if ((t2 = __bsdthread_create(start_routine, arg, stack, t, flags)) == (pthread_t)-1) {
+ _pthread_free_pthread_onstack(t, 1, 0);
+ return (EAGAIN);
+ }
+ else t=t2;
+ LOCK(_pthread_list_lock);
+ t->parentcheck = 1;
+ if ((t->childexit != 0) && ((t->detached & PTHREAD_CREATE_DETACHED) == PTHREAD_CREATE_DETACHED)) {
+ /* detached child exited, mop up */
+ UNLOCK(_pthread_list_lock);
+#if PTH_TRACE
+ __kdebug_trace(0x9000008, t, 0, 0, 1, 0);
+#endif
+ if(t->freeStackOnExit)
+ vm_deallocate(self, (mach_vm_address_t)(long)t, pthreadsize);
+ else
+ free(t);
+ } else if (t->childrun == 0) {
+ TAILQ_INSERT_TAIL(&__pthread_head, t, plist);
+ _pthread_count++;
+#if PTH_LISTTRACE
+ __kdebug_trace(0x900000c, t, 0, 0, 1, 0);
+#endif
+ UNLOCK(_pthread_list_lock);
+ } else
+ UNLOCK(_pthread_list_lock);
+
+ *thread = t;
+
+#if PTH_TRACE
+ __kdebug_trace(0x9000014, t, 0, 0, 1, 0);
+#endif
+ return (0);
+
+ } else {
+ /* kernel allocation */
+#if PTH_TRACE
+ __kdebug_trace(0x9000018, flags, 0, 0, 0, 0);
+#endif
+ if ((t = __bsdthread_create(start_routine, arg, (void *)attrs->stacksize, NULL, flags)) == (pthread_t)-1)
+ return (EAGAIN);
+ /* Now set it up to execute */
+ LOCK(_pthread_list_lock);
+ t->parentcheck = 1;
+ if ((t->childexit != 0) && ((t->detached & PTHREAD_CREATE_DETACHED) == PTHREAD_CREATE_DETACHED)) {
+ /* detached child exited, mop up */
+ UNLOCK(_pthread_list_lock);
+#if PTH_TRACE
+ __kdebug_trace(0x9000008, t, pthreadsize, 0, 2, 0);
+#endif
+ vm_deallocate(self, (mach_vm_address_t)(long)t, pthreadsize);
+ } else if (t->childrun == 0) {
+ TAILQ_INSERT_TAIL(&__pthread_head, t, plist);
+ _pthread_count++;
+#if PTH_LISTTRACE
+ __kdebug_trace(0x900000c, t, 0, 0, 2, 0);
+#endif
+ UNLOCK(_pthread_list_lock);
+ } else
+ UNLOCK(_pthread_list_lock);
+
+ *thread = t;
+
+#if PTH_TRACE
+ __kdebug_trace(0x9000014, t, 0, 0, 2, 0);
+#endif
+ return(0);
+ }
+ }
+}
+
+static int
+_pthread_create_suspended(pthread_t *thread,
+ const pthread_attr_t *attr,
+ void *(*start_routine)(void *),
+ void *arg,
+ int suspended)
+{
+ pthread_attr_t *attrs;
+ void *stack;
+ int res;
+ pthread_t t;
+ kern_return_t kern_res;
+ mach_port_t kernel_thread = MACH_PORT_NULL;
+ int needresume;
+
+ if ((attrs = (pthread_attr_t *)attr) == (pthread_attr_t *)NULL)
+ { /* Set up default paramters */
+ attrs = &_pthread_attr_default;
+ } else if (attrs->sig != _PTHREAD_ATTR_SIG) {
+ return EINVAL;
+ }
+ res = 0;
+
+ /* In default policy (ie SCHED_OTHER) only sched_priority is used. Check for
+ * any change in priority or policy is needed here.
+ */
+ if (((attrs->policy != _PTHREAD_DEFAULT_POLICY) ||
+ (attrs->param.sched_priority != default_priority)) && (suspended == 0)) {
+ needresume = 1;
+ suspended = 1;
+ } else
+ needresume = 0;
+
+ do
+ {
+ /* Allocate a stack for the thread */
+ if ((res = _pthread_allocate_stack(attrs, &stack)) != 0) {
+ break;
+ }
+ t = (pthread_t)malloc(sizeof(struct _pthread));
+ *thread = t;
+ if (suspended) {
+ /* Create the Mach thread for this thread */
+ PTHREAD_MACH_CALL(thread_create(mach_task_self(), &kernel_thread), kern_res);
+ if (kern_res != KERN_SUCCESS)
+ {
+ printf("Can't create thread: %d\n", kern_res);
+ res = EINVAL; /* Need better error here? */
+ break;
+ }
+ }
+ if ((res = _pthread_create(t, attrs, stack, kernel_thread)) != 0)
+ {
+ break;
+ }
+ set_malloc_singlethreaded(0);
+ __is_threaded = 1;
+
+ /* Send it on it's way */
+ t->arg = arg;
+ t->fun = start_routine;
+ /* Now set it up to execute */
+ LOCK(_pthread_list_lock);
+ TAILQ_INSERT_TAIL(&__pthread_head, t, plist);
+#if PTH_LISTTRACE
+ __kdebug_trace(0x900000c, t, 0, 0, 5, 0);
+#endif
+ _pthread_count++;
+ UNLOCK(_pthread_list_lock);
+ _pthread_setup(t, _pthread_body, stack, suspended, needresume);
+ } while (0);
+ return (res);
+}
+
+int
+pthread_create(pthread_t *thread,
+ const pthread_attr_t *attr,
+ void *(*start_routine)(void *),
+ void *arg)
+{
+ return _new_pthread_create_suspended(thread, attr, start_routine, arg, 0);
+}
+
+int
+pthread_create_suspended_np(pthread_t *thread,
+ const pthread_attr_t *attr,
+ void *(*start_routine)(void *),
+ void *arg)
+{
+ return _pthread_create_suspended(thread, attr, start_routine, arg, 1);
+}
+
+/*
+ * Make a thread 'undetached' - no longer 'joinable' with other threads.
+ */
+int
+pthread_detach(pthread_t thread)
+{
+ int newstyle = 0;
+ int ret;
+
+ if ((ret = _pthread_lookup_thread(thread, NULL, 1)) != 0)
+ return (ret); /* Not a valid thread */
+
+ LOCK(thread->lock);
+ newstyle = thread->newstyle;
+ if (thread->detached & PTHREAD_CREATE_JOINABLE)
+ {
+ if (thread->detached & _PTHREAD_EXITED) {
+ UNLOCK(thread->lock);
+ pthread_join(thread, NULL);
+ return 0;
+ } else {
+ if (newstyle == 0) {
+ semaphore_t death = thread->death;
+
+ thread->detached &= ~PTHREAD_CREATE_JOINABLE;
+ thread->detached |= PTHREAD_CREATE_DETACHED;
+ UNLOCK(thread->lock);
+ if (death)
+ (void) semaphore_signal(death);
+ } else {
+ mach_port_t joinport = thread->joiner_notify;
+
+ thread->detached &= ~PTHREAD_CREATE_JOINABLE;
+ thread->detached |= PTHREAD_CREATE_DETACHED;
+
+ UNLOCK(thread->lock);
+ if (joinport) {
+ semaphore_signal(joinport);
+ }
+ }
+ return(0);
+ }
+ } else {
+ UNLOCK(thread->lock);
+ return (EINVAL);
+ }
+}
+
+
+/*
+ * pthread_kill call to system call
+ */
+int
+pthread_kill (
+ pthread_t th,
+ int sig)
+{
+ int error = 0;
+ mach_port_t kport = MACH_PORT_NULL;
+
+ if ((sig < 0) || (sig > NSIG))
+ return(EINVAL);
+
+ if (_pthread_lookup_thread(th, &kport, 0) != 0)
+ return (ESRCH); /* Not a valid thread */
+
+ /* if the thread is a workqueue thread, just return error */
+ if ((th->wqthread != 0) && (th->wqkillset ==0)) {
+ return(ENOTSUP);
+ }
+
+ error = __pthread_kill(kport, sig);
+
+ if (error == -1)
+ error = errno;
+ return(error);
+}
+
+int
+__pthread_workqueue_setkill(int enable)
+{
+ pthread_t self = pthread_self();
+
+ LOCK(self->lock);
+ if (enable == 0)
+ self->wqkillset = 0;
+ else
+ self->wqkillset = 1;
+ UNLOCK(self->lock);
+
+ return(0);
+
+}
+
+/* Announce that there are pthread resources ready to be reclaimed in a */
+/* subsequent pthread_exit or reaped by pthread_join. In either case, the Mach */
+/* thread underneath is terminated right away. */
+static
+void _pthread_become_available(pthread_t thread, mach_port_t kernel_thread) {
+ pthread_reap_msg_t msg;
+ kern_return_t ret;
+
+ msg.header.msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_MAKE_SEND,
+ MACH_MSG_TYPE_MOVE_SEND);
+ msg.header.msgh_size = sizeof msg - sizeof msg.trailer;
+ msg.header.msgh_remote_port = thread_recycle_port;
+ msg.header.msgh_local_port = kernel_thread;
+ msg.header.msgh_id = 0x44454144; /* 'DEAD' */
+ msg.thread = thread;
+ ret = mach_msg_send(&msg.header);
+ assert(ret == MACH_MSG_SUCCESS);
+}
+
+/* Reap the resources for available threads */
+__private_extern__
+int _pthread_reap_thread(pthread_t th, mach_port_t kernel_thread, void **value_ptr, int conforming) {
+ mach_port_type_t ptype;
+ kern_return_t ret;
+ task_t self;
+
+ self = mach_task_self();
+ if (kernel_thread != MACH_PORT_DEAD) {
+ ret = mach_port_type(self, kernel_thread, &ptype);
+ if (ret == KERN_SUCCESS && ptype != MACH_PORT_TYPE_DEAD_NAME) {
+ /* not quite dead yet... */
+ return EAGAIN;
+ }
+ ret = mach_port_deallocate(self, kernel_thread);
+ if (ret != KERN_SUCCESS) {
+ fprintf(stderr,
+ "mach_port_deallocate(kernel_thread) failed: %s\n",
+ mach_error_string(ret));
+ }
+ }
+
+ if (th->reply_port != MACH_PORT_NULL) {
+ ret = mach_port_mod_refs(self, th->reply_port,
+ MACH_PORT_RIGHT_RECEIVE, -1);
+ if (ret != KERN_SUCCESS) {
+ fprintf(stderr,
+ "mach_port_mod_refs(reply_port) failed: %s\n",
+ mach_error_string(ret));
+ }
+ }
+
+ if (th->freeStackOnExit) {
+ vm_address_t addr = (vm_address_t)th->stackaddr;
+ vm_size_t size;
+
+ size = (vm_size_t)th->stacksize + th->guardsize;
+
+ addr -= size;
+ ret = vm_deallocate(self, addr, size);
+ if (ret != KERN_SUCCESS) {
+ fprintf(stderr,
+ "vm_deallocate(stack) failed: %s\n",
+ mach_error_string(ret));
+ }
+ }
+
+
+ if (value_ptr)
+ *value_ptr = th->exit_value;
+ if (conforming) {
+ if ((th->cancel_state & (PTHREAD_CANCEL_ENABLE|_PTHREAD_CANCEL_PENDING)) ==
+ (PTHREAD_CANCEL_ENABLE|_PTHREAD_CANCEL_PENDING) && (value_ptr != NULL))
+ *value_ptr = PTHREAD_CANCELED;
+ th->sig = _PTHREAD_NO_SIG;
+ }
+
+
+ if (th != &_thread)
+ free(th);
+
+ return 0;
+}
+
+static
+void _pthread_reap_threads(void)
+{
+ pthread_reap_msg_t msg;
+ kern_return_t ret;
+
+ ret = mach_msg(&msg.header, MACH_RCV_MSG|MACH_RCV_TIMEOUT, 0,
+ sizeof msg, thread_recycle_port,
+ MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
+ while (ret == MACH_MSG_SUCCESS) {
+ mach_port_t kernel_thread = msg.header.msgh_remote_port;
+ pthread_t thread = msg.thread;
+
+ /* deal with race with thread_create_running() */
+ if (kernel_thread == MACH_PORT_NULL &&
+ kernel_thread != thread->kernel_thread) {
+ kernel_thread = thread->kernel_thread;
+ }
+
+ if ( kernel_thread == MACH_PORT_NULL ||
+ _pthread_reap_thread(thread, kernel_thread, (void **)0, 0) == EAGAIN)
+ {
+ /* not dead yet, put it back for someone else to reap, stop here */
+ _pthread_become_available(thread, kernel_thread);
+ return;
+ }
+
+ ret = mach_msg(&msg.header, MACH_RCV_MSG|MACH_RCV_TIMEOUT, 0,
+ sizeof msg, thread_recycle_port,
+ MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
+ }
+}
+
+/* For compatibility... */
+
+pthread_t
+_pthread_self() {
+ return pthread_self();
+}
+
+/*
+ * Terminate a thread.
+ */
+int __disable_threadsignal(int);
+
+static void
+_pthread_exit(pthread_t self, void *value_ptr)
+{
+ struct __darwin_pthread_handler_rec *handler;
+ kern_return_t kern_res;
+ int thread_count;
+ int newstyle = self->newstyle;
+
+ /* Make this thread not to receive any signals */
+ __disable_threadsignal(1);
+
+#if PTH_TRACE
+ __kdebug_trace(0x900001c, self, newstyle, 0, 0, 0);
+#endif
+
+ /* set cancel state to disable and type to deferred */
+ _pthread_setcancelstate_exit(self, value_ptr, __unix_conforming);
+
+ while ((handler = self->__cleanup_stack) != 0)
+ {
+ (handler->__routine)(handler->__arg);
+ self->__cleanup_stack = handler->__next;
+ }
+ _pthread_tsd_cleanup(self);
+
+ if (newstyle == 0) {
+ _pthread_reap_threads();
+
+ LOCK(self->lock);
+ self->detached |= _PTHREAD_EXITED;
+
+ if (self->detached & PTHREAD_CREATE_JOINABLE) {
+ mach_port_t death = self->death;
+ self->exit_value = value_ptr;
+ UNLOCK(self->lock);
+ /* the joiner will need a kernel thread reference, leave ours for it */
+ if (death) {
+ PTHREAD_MACH_CALL(semaphore_signal(death), kern_res);
+ if (kern_res != KERN_SUCCESS)
+ fprintf(stderr,
+ "semaphore_signal(death) failed: %s\n",
+ mach_error_string(kern_res));
+ }
+ LOCK(_pthread_list_lock);
+ thread_count = --_pthread_count;
+ UNLOCK(_pthread_list_lock);
+ } else {
+ UNLOCK(self->lock);
+ LOCK(_pthread_list_lock);
+ TAILQ_REMOVE(&__pthread_head, self, plist);
+#if PTH_LISTTRACE
+ __kdebug_trace(0x9000010, self, 0, 0, 5, 0);
+#endif
+ thread_count = --_pthread_count;
+ UNLOCK(_pthread_list_lock);
+ /* with no joiner, we let become available consume our cached ref */
+ _pthread_become_available(self, self->kernel_thread);
+ }
+
+ if (thread_count <= 0)
+ exit(0);
+
+ /* Use a new reference to terminate ourselves. Should never return. */
+ PTHREAD_MACH_CALL(thread_terminate(mach_thread_self()), kern_res);
+ fprintf(stderr, "thread_terminate(mach_thread_self()) failed: %s\n",
+ mach_error_string(kern_res));
+ } else {
+ semaphore_t joinsem = SEMAPHORE_NULL;
+
+ if ((self->joiner_notify == (mach_port_t)0) && (self->detached & PTHREAD_CREATE_JOINABLE))
+ joinsem = new_sem_from_pool();
+ LOCK(self->lock);
+ self->detached |= _PTHREAD_EXITED;
+
+ self->exit_value = value_ptr;
+ if (self->detached & PTHREAD_CREATE_JOINABLE) {
+ if (self->joiner_notify == (mach_port_t)0) {
+ self->joiner_notify = joinsem;
+ joinsem = SEMAPHORE_NULL;
+ }
+ UNLOCK(self->lock);
+ if (joinsem != SEMAPHORE_NULL)
+ restore_sem_to_pool(joinsem);
+ _pthread_free_pthread_onstack(self, 0, 1);
+ } else {
+ UNLOCK(self->lock);
+ /* with no joiner, we let become available consume our cached ref */
+ if (joinsem != SEMAPHORE_NULL)
+ restore_sem_to_pool(joinsem);
+ _pthread_free_pthread_onstack(self, 1, 1);
+ }
+ }
+ LIBC_ABORT("thread %p didn't exit", self);
+}
+
+void
+pthread_exit(void *value_ptr)
+{
+ pthread_t self = pthread_self();
+ /* if the current thread is a workqueue thread, just crash the app, as per libdispatch folks */
+ if (self->wqthread == 0) {
+ _pthread_exit(self, value_ptr);
+ } else {
+ LIBC_ABORT("pthread_exit() may only be called against threads created via pthread_create()");
+ }
+}
+
+/*
+ * Get the scheduling policy and scheduling paramters for a thread.
+ */
+int
+pthread_getschedparam(pthread_t thread,
+ int *policy,
+ struct sched_param *param)
+{
+ int ret;
+
+ if (thread == NULL)
+ return(ESRCH);
+
+ LOCK(_pthread_list_lock);
+
+ if ((ret = _pthread_find_thread(thread)) != 0) {
+ UNLOCK(_pthread_list_lock);
+ return(ret);
+ }
+ if (policy != 0)
+ *policy = thread->policy;
+ if (param != 0)
+ *param = thread->param;
+ UNLOCK(_pthread_list_lock);
+
+ return(0);
+}
+
+/*
+ * Set the scheduling policy and scheduling paramters for a thread.
+ */
+static int
+pthread_setschedparam_internal(pthread_t thread,
+ mach_port_t kport,
+ int policy,
+ const struct sched_param *param)
+{
+ policy_base_data_t bases;
+ policy_base_t base;
+ mach_msg_type_number_t count;
+ kern_return_t ret;
+
+ switch (policy)
+ {
+ case SCHED_OTHER:
+ bases.ts.base_priority = param->sched_priority;
+ base = (policy_base_t)&bases.ts;
+ count = POLICY_TIMESHARE_BASE_COUNT;
+ break;
+ case SCHED_FIFO:
+ bases.fifo.base_priority = param->sched_priority;
+ base = (policy_base_t)&bases.fifo;
+ count = POLICY_FIFO_BASE_COUNT;
+ break;
+ case SCHED_RR:
+ bases.rr.base_priority = param->sched_priority;
+ /* quantum isn't public yet */
+ bases.rr.quantum = param->quantum;
+ base = (policy_base_t)&bases.rr;
+ count = POLICY_RR_BASE_COUNT;
+ break;
+ default:
+ return (EINVAL);
+ }
+ ret = thread_policy(kport, policy, base, count, TRUE);
+ if (ret != KERN_SUCCESS)
+ return (EINVAL);
+ return (0);
+}
+
+int
+pthread_setschedparam(pthread_t t,
+ int policy,
+ const struct sched_param *param)
+{
+ mach_port_t kport = MACH_PORT_NULL;
+ int error;
+ int bypass = 1;
+
+ if (t != pthread_self() && t != &_thread ) { //since the main thread will not get de-allocated from underneath us
+ bypass = 0;
+ if (_pthread_lookup_thread(t, &kport, 0) != 0)
+ return(ESRCH);
+ } else
+ kport = t->kernel_thread;
+
+ error = pthread_setschedparam_internal(t, kport, policy, param);
+ if (error == 0) {
+ if (bypass == 0) {
+ /* ensure the thread is still valid */
+ LOCK(_pthread_list_lock);
+ if ((error = _pthread_find_thread(t)) != 0) {
+ UNLOCK(_pthread_list_lock);
+ return(error);
+ }
+ t->policy = policy;
+ t->param = *param;
+ UNLOCK(_pthread_list_lock);
+ } else {
+ t->policy = policy;
+ t->param = *param;
+ }
+ }
+ return(error);
+}
+
+/*
+ * Get the minimum priority for the given policy
+ */
+int
+sched_get_priority_min(int policy)
+{
+ return default_priority - 16;
+}
+
+/*
+ * Get the maximum priority for the given policy
+ */
+int
+sched_get_priority_max(int policy)
+{
+ return default_priority + 16;
+}
+
+/*
+ * Determine if two thread identifiers represent the same thread.
+ */
+int
+pthread_equal(pthread_t t1,
+ pthread_t t2)
+{
+ return (t1 == t2);
+}
+
+__private_extern__ void
+_pthread_set_self(pthread_t p)
+{
+ extern void __pthread_set_self(pthread_t);
+ if (p == 0) {
+ bzero(&_thread, sizeof(struct _pthread));
+ p = &_thread;
+ }
+ p->tsd[0] = p;
+ __pthread_set_self(p);
+}
+
+void
+cthread_set_self(void *cself)
+{
+ pthread_t self = pthread_self();
+ if ((self == (pthread_t)NULL) || (self->sig != _PTHREAD_SIG)) {
+ _pthread_set_self(cself);
+ return;
+ }
+ self->cthread_self = cself;
+}
+
+void *
+ur_cthread_self(void) {
+ pthread_t self = pthread_self();
+ if ((self == (pthread_t)NULL) || (self->sig != _PTHREAD_SIG)) {
+ return (void *)self;
+ }
+ return self->cthread_self;
+}
+
+/*
+ * cancellation handler for pthread once as the init routine can have a
+ * cancellation point. In that case we need to restore the spin unlock
+ */
+void
+__pthread_once_cancel_handler(pthread_once_t *once_control)
+{
+ _spin_unlock(&once_control->lock);
+}
+
+
+/*
+ * Execute a function exactly one time in a thread-safe fashion.
+ */
+int
+pthread_once(pthread_once_t *once_control,
+ void (*init_routine)(void))
+{
+ _spin_lock(&once_control->lock);
+ if (once_control->sig == _PTHREAD_ONCE_SIG_init)
+ {
+ pthread_cleanup_push((void (*)(void *))__pthread_once_cancel_handler, once_control);
+ (*init_routine)();
+ pthread_cleanup_pop(0);
+ once_control->sig = _PTHREAD_ONCE_SIG;
+ }
+ _spin_unlock(&once_control->lock);
+ return (0); /* Spec defines no possible errors! */
+}
+
+/*
+ * Insert a cancellation point in a thread.
+ */
+__private_extern__ void
+_pthread_testcancel(pthread_t thread, int isconforming)
+{
+ LOCK(thread->lock);
+ if ((thread->cancel_state & (PTHREAD_CANCEL_ENABLE|_PTHREAD_CANCEL_PENDING)) ==
+ (PTHREAD_CANCEL_ENABLE|_PTHREAD_CANCEL_PENDING))
+ {
+ UNLOCK(thread->lock);
+ if (isconforming)
+ pthread_exit(PTHREAD_CANCELED);
+ else
+ pthread_exit(0);
+ }
+ UNLOCK(thread->lock);
+}
+
+
+
+int
+pthread_getconcurrency(void)
+{
+ return(pthread_concurrency);
+}
+
+int
+pthread_setconcurrency(int new_level)
+{
+ if (new_level < 0)
+ return EINVAL;
+ pthread_concurrency = new_level;
+ return(0);
+}
+
+/*
+ * Perform package initialization - called automatically when application starts
+ */
+__private_extern__ int
+pthread_init(void)
+{
+ pthread_attr_t *attrs;
+ pthread_t thread;
+ kern_return_t kr;
+ host_priority_info_data_t priority_info;
+ host_info_t info;
+ host_flavor_t flavor;
+ host_t host;
+ mach_msg_type_number_t count;
+ int mib[2];
+ int ncpus = 0;
+ size_t len;
+ void *stackaddr;
+
+ pthreadsize = round_page(sizeof (struct _pthread));
+ count = HOST_PRIORITY_INFO_COUNT;
+ info = (host_info_t)&priority_info;
+ flavor = HOST_PRIORITY_INFO;
+ host = mach_host_self();
+ kr = host_info(host, flavor, info, &count);
+ if (kr != KERN_SUCCESS)
+ printf("host_info failed (%d); probably need privilege.\n", kr);
+ else {
+ default_priority = priority_info.user_priority;
+ min_priority = priority_info.minimum_priority;
+ max_priority = priority_info.maximum_priority;
+ }
+ attrs = &_pthread_attr_default;
+ pthread_attr_init(attrs);
+
+ TAILQ_INIT(&__pthread_head);
+ LOCK_INIT(_pthread_list_lock);
+ thread = &_thread;
+ TAILQ_INSERT_HEAD(&__pthread_head, thread, plist);
+ _pthread_set_self(thread);
+#if PTH_LISTTRACE
+ __kdebug_trace(0x900000c, thread, 0, 0, 10, 0);
+#endif
+
+ /* In case of dyld reset the tsd keys from 1 - 10 */
+ _pthread_keys_init();
+
+ mib[0] = CTL_KERN;
+ mib[1] = KERN_USRSTACK;
+ len = sizeof (stackaddr);
+ if (sysctl (mib, 2, &stackaddr, &len, NULL, 0) != 0)
+ stackaddr = (void *)USRSTACK;
+ _pthread_create(thread, attrs, stackaddr, mach_thread_self());
+ thread->stacksize = DFLSSIZ; //initialize main thread's stacksize based on vmparam.h
+ thread->detached = PTHREAD_CREATE_JOINABLE|_PTHREAD_CREATE_PARENT;
+
+ _init_cpu_capabilities();
+ if ((ncpus = _NumCPUs()) > 1)
+ _spin_tries = MP_SPIN_TRIES;
+
+ workq_targetconc[WORKQ_HIGH_PRIOQUEUE] = ncpus;
+ workq_targetconc[WORKQ_DEFAULT_PRIOQUEUE] = ncpus;
+ workq_targetconc[WORKQ_LOW_PRIOQUEUE] = ncpus;
+
+ mach_port_deallocate(mach_task_self(), host);
+
+#if defined(__ppc__)
+ IF_ROSETTA() {
+ __oldstyle = 1;
+ }
+#endif
+#if defined(__arm__)
+ __oldstyle = 1;
+#endif
+
+#if defined(_OBJC_PAGE_BASE_ADDRESS)
+{
+ vm_address_t objcRTPage = (vm_address_t)_OBJC_PAGE_BASE_ADDRESS;
+ kr = vm_map(mach_task_self(),
+ &objcRTPage, vm_page_size * 4, vm_page_size - 1,
+ VM_FLAGS_FIXED | VM_MAKE_TAG(0), // Which tag to use?
+ MACH_PORT_NULL,
+ (vm_address_t)0, FALSE,
+ (vm_prot_t)0, VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE,
+ VM_INHERIT_DEFAULT);
+ /* We ignore the return result here. The ObjC runtime will just have to deal. */
+}
+#endif
+
+ mig_init(1); /* enable multi-threaded mig interfaces */
+ if (__oldstyle == 0) {
+#if defined(__i386__) || defined(__x86_64__)
+ __bsdthread_register(thread_start, start_wqthread, round_page(sizeof(struct _pthread)), _pthread_start, &workq_targetconc[0], (__uint64_t)(&thread->tsd[__PTK_LIBDISPATCH_KEY0]) - (__uint64_t)thread);
+#else
+ __bsdthread_register(_pthread_start, _pthread_wqthread, round_page(sizeof(struct _pthread)), NULL, &workq_targetconc[0], (__uint64_t)&thread->tsd[__PTK_LIBDISPATCH_KEY0] - (__uint64_t)thread);
+#endif
+ }
+
+#if defined(__i386__) || defined(__x86_64__) || defined(__arm__)
+ if( (thread->thread_id = __thread_selfid()) == (__uint64_t)-1)
+ printf("Failed to set thread_id in pthread_init\n");
+ return 0;
+#endif
+}
+
+int sched_yield(void)
+{
+ swtch_pri(0);
+ return 0;
+}
+
+/* This used to be the "magic" that gets the initialization routine called when the application starts */
+static int _do_nothing(void) { return 0; }
+int (*_cthread_init_routine)(void) = _do_nothing;
+
+/* Get a semaphore from the pool, growing it if necessary */
+
+__private_extern__ semaphore_t new_sem_from_pool(void) {
+ kern_return_t res;
+ semaphore_t sem;
+ int i;
+
+ LOCK(sem_pool_lock);
+ if (sem_pool_current == sem_pool_count) {
+ sem_pool_count += 16;
+ sem_pool = realloc(sem_pool, sem_pool_count * sizeof(semaphore_t));
+ for (i = sem_pool_current; i < sem_pool_count; i++) {
+ PTHREAD_MACH_CALL(semaphore_create(mach_task_self(), &sem_pool[i], SYNC_POLICY_FIFO, 0), res);
+ }
+ }
+ sem = sem_pool[sem_pool_current++];
+ UNLOCK(sem_pool_lock);
+ return sem;
+}
+
+/* Put a semaphore back into the pool */
+__private_extern__ void restore_sem_to_pool(semaphore_t sem) {
+ LOCK(sem_pool_lock);
+ sem_pool[--sem_pool_current] = sem;
+ UNLOCK(sem_pool_lock);
+}
+
+static void sem_pool_reset(void) {
+ LOCK(sem_pool_lock);
+ sem_pool_count = 0;
+ sem_pool_current = 0;
+ sem_pool = NULL;
+ UNLOCK(sem_pool_lock);
+}
+
+__private_extern__ void _pthread_fork_child(pthread_t p) {
+ /* Just in case somebody had it locked... */
+ UNLOCK(sem_pool_lock);
+ sem_pool_reset();
+ /* No need to hold the pthread_list_lock as no one other than this
+ * thread is present at this time
+ */
+ TAILQ_INIT(&__pthread_head);
+ LOCK_INIT(_pthread_list_lock);
+ TAILQ_INSERT_HEAD(&__pthread_head, p, plist);
+#if PTH_LISTTRACE
+ __kdebug_trace(0x900000c, p, 0, 0, 10, 0);
+#endif
+ _pthread_count = 1;
+#if defined(__i386__) || defined(__x86_64__) || defined(__arm__)
+ if( (p->thread_id = __thread_selfid()) == (__uint64_t)-1)
+ printf("Failed to set thread_id in pthread_fork_child\n");
+#endif
+}
+
+/*
+ * Query/update the cancelability 'state' of a thread
+ */
+int
+_pthread_setcancelstate_internal(int state, int *oldstate, int conforming)
+{
+ pthread_t self = pthread_self();
+
+
+ switch (state) {
+ case PTHREAD_CANCEL_ENABLE:
+ if (conforming)
+ __pthread_canceled(1);
+ break;
+ case PTHREAD_CANCEL_DISABLE:
+ if (conforming)
+ __pthread_canceled(2);
+ break;
+ default:
+ return EINVAL;
+ }
+
+ self = pthread_self();
+ LOCK(self->lock);
+ if (oldstate)
+ *oldstate = self->cancel_state & _PTHREAD_CANCEL_STATE_MASK;
+ self->cancel_state &= ~_PTHREAD_CANCEL_STATE_MASK;
+ self->cancel_state |= state;
+ UNLOCK(self->lock);
+ if (!conforming)
+ _pthread_testcancel(self, 0); /* See if we need to 'die' now... */
+ return (0);
+}
+
+/* When a thread exits set the cancellation state to DISABLE and DEFERRED */
+static void
+_pthread_setcancelstate_exit(pthread_t self, void * value_ptr, int conforming)
+{
+ LOCK(self->lock);
+ self->cancel_state &= ~(_PTHREAD_CANCEL_STATE_MASK | _PTHREAD_CANCEL_TYPE_MASK);
+ self->cancel_state |= (PTHREAD_CANCEL_DISABLE | PTHREAD_CANCEL_DEFERRED);
+ if ((value_ptr == PTHREAD_CANCELED)) {
+// 4597450: begin
+ self->detached |= _PTHREAD_WASCANCEL;
+// 4597450: end
+ }
+ UNLOCK(self->lock);
+}
+
+int
+_pthread_join_cleanup(pthread_t thread, void ** value_ptr, int conforming)
+{
+ kern_return_t res;
+ int detached = 0, ret;
+
+#if PTH_TRACE
+ __kdebug_trace(0x9000028, thread, 0, 0, 1, 0);
+#endif
+ /* The scenario where the joiner was waiting for the thread and
+ * the pthread detach happened on that thread. Then the semaphore
+ * will trigger but by the time joiner runs, the target thread could be
+ * freed. So we need to make sure that the thread is still in the list
+ * and is joinable before we continue with the join.
+ */
+ LOCK(_pthread_list_lock);
+ if ((ret = _pthread_find_thread(thread)) != 0) {
+ UNLOCK(_pthread_list_lock);
+ /* returns ESRCH */
+ return(ret);
+ }
+ if ((thread->detached & PTHREAD_CREATE_JOINABLE) == 0) {
+ /* the thread might be a detached thread */
+ UNLOCK(_pthread_list_lock);
+ return(ESRCH);
+
+ }
+ /* It is still a joinable thread and needs to be reaped */
+ TAILQ_REMOVE(&__pthread_head, thread, plist);
+#if PTH_LISTTRACE
+ __kdebug_trace(0x9000010, thread, 0, 0, 3, 0);
+#endif
+ UNLOCK(_pthread_list_lock);
+
+ if (value_ptr)
+ *value_ptr = thread->exit_value;
+ if (conforming) {
+ if ((thread->cancel_state & (PTHREAD_CANCEL_ENABLE|_PTHREAD_CANCEL_PENDING)) ==
+ (PTHREAD_CANCEL_ENABLE|_PTHREAD_CANCEL_PENDING) && (value_ptr != NULL)) {
+ *value_ptr = PTHREAD_CANCELED;
+ }
+ }
+ if (thread->reply_port != MACH_PORT_NULL) {
+ res = mach_port_mod_refs(mach_task_self(), thread->reply_port, MACH_PORT_RIGHT_RECEIVE, -1);
+ if (res != KERN_SUCCESS)
+ fprintf(stderr,"mach_port_mod_refs(reply_port) failed: %s\n",mach_error_string(res));
+ thread->reply_port = MACH_PORT_NULL;
+ }
+ if (thread->freeStackOnExit) {
+ thread->sig = _PTHREAD_NO_SIG;
+#if PTH_TRACE
+ __kdebug_trace(0x9000028, thread, 0, 0, 2, 0);
+#endif
+ vm_deallocate(mach_task_self(), (mach_vm_address_t)(long)thread, pthreadsize);
+ } else {
+ thread->sig = _PTHREAD_NO_SIG;
+#if PTH_TRACE
+ __kdebug_trace(0x9000028, thread, 0, 0, 3, 0);
+#endif
+ free(thread);
+ }
+ return(0);
+}
+
+/* ALWAYS called with list lock and return with list lock */
+int
+_pthread_find_thread(pthread_t thread)
+{
+ pthread_t p;
+
+loop:
+ TAILQ_FOREACH(p, &__pthread_head, plist) {
+ if (p == thread) {
+ if (thread->kernel_thread == MACH_PORT_NULL) {
+ UNLOCK(_pthread_list_lock);
+ sched_yield();
+ LOCK(_pthread_list_lock);
+ goto loop;
+ }
+ return(0);
+ }
+ }
+ return(ESRCH);
+}
+
+int
+_pthread_lookup_thread(pthread_t thread, mach_port_t * portp, int only_joinable)
+{
+ mach_port_t kport;
+ int ret = 0;
+
+ if (thread == NULL)
+ return(ESRCH);
+
+ LOCK(_pthread_list_lock);
+
+ if ((ret = _pthread_find_thread(thread)) != 0) {
+ UNLOCK(_pthread_list_lock);
+ return(ret);
+ }
+ if ((only_joinable != 0) && ((thread->detached & PTHREAD_CREATE_DETACHED) != 0)) {
+ UNLOCK(_pthread_list_lock);
+ return(EINVAL);
+ }
+ kport = thread->kernel_thread;
+ UNLOCK(_pthread_list_lock);
+ if (portp != NULL)
+ *portp = kport;
+ return(0);
+}
+
+/* XXXXXXXXXXXXX Pthread Workqueue Attributes XXXXXXXXXXXXXXXXXX */
+int
+pthread_workqueue_attr_init_np(pthread_workqueue_attr_t * attrp)
+{
+ attrp->queueprio = WORKQ_DEFAULT_PRIOQUEUE;
+ attrp->sig = PTHREAD_WORKQUEUE_ATTR_SIG;
+ attrp->overcommit = 0;
+ return(0);
+}
+
+int
+pthread_workqueue_attr_destroy_np(pthread_workqueue_attr_t * attr)
+{
+ if (attr->sig == PTHREAD_WORKQUEUE_ATTR_SIG)
+ {
+ return (0);
+ } else
+ {
+ return (EINVAL); /* Not an attribute structure! */
+ }
+}
+
+int
+pthread_workqueue_attr_getqueuepriority_np(const pthread_workqueue_attr_t * attr, int * qpriop)
+{
+ if (attr->sig == PTHREAD_WORKQUEUE_ATTR_SIG) {
+ *qpriop = attr->queueprio;
+ return (0);
+ } else {
+ return (EINVAL); /* Not an attribute structure! */
+ }
+}
+
+
+int
+pthread_workqueue_attr_setqueuepriority_np(pthread_workqueue_attr_t * attr, int qprio)
+{
+int error = 0;
+
+ if (attr->sig == PTHREAD_WORKQUEUE_ATTR_SIG) {
+ switch(qprio) {
+ case WORKQ_HIGH_PRIOQUEUE:
+ case WORKQ_DEFAULT_PRIOQUEUE:
+ case WORKQ_LOW_PRIOQUEUE:
+ attr->queueprio = qprio;
+ break;
+ default:
+ error = EINVAL;
+ }
+ } else {
+ error = EINVAL;
+ }
+ return (error);
+}
+
+
+int
+pthread_workqueue_attr_getovercommit_np(const pthread_workqueue_attr_t * attr, int * ocommp)
+{
+ if (attr->sig == PTHREAD_WORKQUEUE_ATTR_SIG) {
+ *ocommp = attr->overcommit;
+ return (0);
+ } else {
+ return (EINVAL); /* Not an attribute structure! */
+ }
+}
+
+
+int
+pthread_workqueue_attr_setovercommit_np(pthread_workqueue_attr_t * attr, int ocomm)
+{
+int error = 0;
+
+ if (attr->sig == PTHREAD_WORKQUEUE_ATTR_SIG) {
+ attr->overcommit = ocomm;
+ } else {
+ error = EINVAL;
+ }
+ return (error);
+}
+/* XXXXXXXXXXXXX Pthread Workqueue support routines XXXXXXXXXXXXXXXXXX */
+
+static void
+workqueue_list_lock()
+{
+ OSSpinLockLock(&__workqueue_list_lock);
+}
+
+static void
+workqueue_list_unlock()
+{
+ OSSpinLockUnlock(&__workqueue_list_lock);
+}
+
+int
+pthread_workqueue_init_np()
+{
+ int ret;
+
+ workqueue_list_lock();
+ ret =_pthread_work_internal_init();
+ workqueue_list_unlock();
+
+ return(ret);
+}
+
+int
+pthread_workqueue_requestconcurrency_np(int queue, int request_concurrency)
+{
+ int error = 0;
+
+ if (queue < 0 || queue > WORKQ_NUM_PRIOQUEUE)
+ return(EINVAL);
+
+ error =__workq_kernreturn(WQOPS_THREAD_SETCONC, NULL, request_concurrency, queue);
+
+ if (error == -1)
+ return(errno);
+ return(0);
+}
+
+void
+pthread_workqueue_atfork_prepare(void)
+{
+ /*
+ * NOTE: Any workq additions here
+ * should be for i386,x86_64 only
+ */
+ dispatch_atfork_prepare();
+}
+
+void
+pthread_workqueue_atfork_parent(void)
+{
+ /*
+ * NOTE: Any workq additions here
+ * should be for i386,x86_64 only
+ */
+ dispatch_atfork_parent();
+}
+
+void
+pthread_workqueue_atfork_child(void)
+{
+#if defined(__i386__) || defined(__x86_64__)
+ /*
+ * NOTE: workq additions here
+ * are for i386,x86_64 only as
+ * ppc and arm do not support it
+ */
+ __workqueue_list_lock = OS_SPINLOCK_INIT;
+ if (kernel_workq_setup != 0){
+ kernel_workq_setup = 0;
+ _pthread_work_internal_init();
+ }
+#endif
+ dispatch_atfork_child();
+}
+
+static int
+_pthread_work_internal_init(void)
+{
+ int i, error;
+ pthread_workqueue_head_t headp;
+ pthread_workitem_t witemp;
+ pthread_workqueue_t wq;
+
+ if (kernel_workq_setup == 0) {
+#if defined(__i386__) || defined(__x86_64__)
+ __bsdthread_register(thread_start, start_wqthread, round_page(sizeof(struct _pthread)),NULL,NULL, NULL);
+#else
+ __bsdthread_register(_pthread_start, _pthread_wqthread, round_page(sizeof(struct _pthread)),NULL,NULL, NULL);
+#endif
+
+ _pthread_wq_attr_default.queueprio = WORKQ_DEFAULT_PRIOQUEUE;
+ _pthread_wq_attr_default.sig = PTHREAD_WORKQUEUE_ATTR_SIG;
+
+ for( i = 0; i< WQ_NUM_PRIO_QS; i++) {
+ headp = __pthread_wq_head_tbl[i];
+ TAILQ_INIT(&headp->wqhead);
+ headp->next_workq = 0;
+ }
+
+ /* create work item and workqueue pools */
+ witemp = (struct _pthread_workitem *)malloc(sizeof(struct _pthread_workitem) * WORKITEM_POOL_SIZE);
+ bzero(witemp, (sizeof(struct _pthread_workitem) * WORKITEM_POOL_SIZE));
+ for (i = 0; i < WORKITEM_POOL_SIZE; i++) {
+ TAILQ_INSERT_TAIL(&__pthread_workitem_pool_head, &witemp[i], item_entry);
+ }
+ wq = (struct _pthread_workqueue *)malloc(sizeof(struct _pthread_workqueue) * WORKQUEUE_POOL_SIZE);
+ bzero(wq, (sizeof(struct _pthread_workqueue) * WORKQUEUE_POOL_SIZE));
+ for (i = 0; i < WORKQUEUE_POOL_SIZE; i++) {
+ TAILQ_INSERT_TAIL(&__pthread_workqueue_pool_head, &wq[i], wq_list);
+ }
+
+ if (error = __workq_open()) {
+ TAILQ_INIT(&__pthread_workitem_pool_head);
+ TAILQ_INIT(&__pthread_workqueue_pool_head);
+ free(witemp);
+ free(wq);
+ return(ENOMEM);
+ }
+ kernel_workq_setup = 1;
+ }
+ return(0);
+}
+
+
+/* This routine is called with list lock held */
+static pthread_workitem_t
+alloc_workitem(void)
+{
+ pthread_workitem_t witem;
+
+ if (TAILQ_EMPTY(&__pthread_workitem_pool_head)) {
+ workqueue_list_unlock();
+ witem = malloc(sizeof(struct _pthread_workitem));
+ witem->gencount = 0;
+ workqueue_list_lock();
+ } else {
+ witem = TAILQ_FIRST(&__pthread_workitem_pool_head);
+ TAILQ_REMOVE(&__pthread_workitem_pool_head, witem, item_entry);
+ }
+ return(witem);
+}
+
+/* This routine is called with list lock held */
+static void
+free_workitem(pthread_workitem_t witem)
+{
+ witem->gencount++;
+ TAILQ_INSERT_TAIL(&__pthread_workitem_pool_head, witem, item_entry);
+}
+
+/* This routine is called with list lock held */
+static pthread_workqueue_t
+alloc_workqueue(void)
+{
+ pthread_workqueue_t wq;
+
+ if (TAILQ_EMPTY(&__pthread_workqueue_pool_head)) {
+ workqueue_list_unlock();
+ wq = malloc(sizeof(struct _pthread_workqueue));
+ workqueue_list_lock();
+ } else {
+ wq = TAILQ_FIRST(&__pthread_workqueue_pool_head);
+ TAILQ_REMOVE(&__pthread_workqueue_pool_head, wq, wq_list);
+ }
+ user_workq_count++;
+ return(wq);
+}
+
+/* This routine is called with list lock held */
+static void
+free_workqueue(pthread_workqueue_t wq)
+{
+ user_workq_count--;
+ TAILQ_INSERT_TAIL(&__pthread_workqueue_pool_head, wq, wq_list);
+}
+
+static void
+_pthread_workq_init(pthread_workqueue_t wq, const pthread_workqueue_attr_t * attr)
+{
+ bzero(wq, sizeof(struct _pthread_workqueue));
+ if (attr != NULL) {
+ wq->queueprio = attr->queueprio;
+ wq->overcommit = attr->overcommit;
+ } else {
+ wq->queueprio = WORKQ_DEFAULT_PRIOQUEUE;
+ wq->overcommit = 0;
+ }
+ LOCK_INIT(wq->lock);
+ wq->flags = 0;
+ TAILQ_INIT(&wq->item_listhead);
+ TAILQ_INIT(&wq->item_kernhead);
+#if WQ_LISTTRACE
+ __kdebug_trace(0x90080ac, wq, &wq->item_listhead, wq->item_listhead.tqh_first, wq->item_listhead.tqh_last, 0);
+#endif
+ wq->wq_list.tqe_next = 0;
+ wq->wq_list.tqe_prev = 0;
+ wq->sig = PTHREAD_WORKQUEUE_SIG;
+ wq->headp = __pthread_wq_head_tbl[wq->queueprio];
+}
+
+int
+valid_workq(pthread_workqueue_t workq)
+{
+ if (workq->sig == PTHREAD_WORKQUEUE_SIG)
+ return(1);
+ else
+ return(0);
+}
+
+
+/* called with list lock */
+static void
+pick_nextworkqueue_droplock()
+{
+ int i, curwqprio, val, found;
+ pthread_workqueue_head_t headp;
+ pthread_workqueue_t workq;
+ pthread_workqueue_t nworkq = NULL;
+
+#if WQ_TRACE
+ __kdebug_trace(0x9008098, kernel_workq_count, 0, 0, 0, 0);
+#endif
+loop:
+ while (kernel_workq_count < KERNEL_WORKQ_ELEM_MAX) {
+ found = 0;
+ for (i = 0; i < WQ_NUM_PRIO_QS; i++) {
+ wqreadyprio = i; /* because there is nothing else higher to run */
+ headp = __pthread_wq_head_tbl[i];
+
+ if (TAILQ_EMPTY(&headp->wqhead))
+ continue;
+ workq = headp->next_workq;
+ if (workq == NULL)
+ workq = TAILQ_FIRST(&headp->wqhead);
+ curwqprio = workq->queueprio;
+ nworkq = workq; /* starting pt */
+ while (kernel_workq_count < KERNEL_WORKQ_ELEM_MAX) {
+ headp->next_workq = TAILQ_NEXT(workq, wq_list);
+ if (headp->next_workq == NULL)
+ headp->next_workq = TAILQ_FIRST(&headp->wqhead);
+#if WQ_TRACE
+ __kdebug_trace(0x9008098, kernel_workq_count, workq, 0, 1, 0);
+#endif
+ val = post_nextworkitem(workq);
+
+ if (val != 0) {
+ /* things could have changed so reasses */
+ /* If kernel queue is full , skip */
+ if (kernel_workq_count >= KERNEL_WORKQ_ELEM_MAX)
+ break;
+ /* If anything with higher prio arrived, then reevaluate */
+ if (wqreadyprio < curwqprio)
+ goto loop; /* we need re evaluate again */
+ /* we can post some more work items */
+ found = 1;
+ }
+
+ /* cannot use workq here as it could be freed */
+ if (TAILQ_EMPTY(&headp->wqhead))
+ break;
+ /* if we found nothing to run and only one workqueue in the list, skip */
+ if ((val == 0) && (workq == headp->next_workq))
+ break;
+ workq = headp->next_workq;
+ if (workq == NULL)
+ workq = TAILQ_FIRST(&headp->wqhead);
+ if (val != 0)
+ nworkq = workq;
+ /* if we found nothing to run and back to workq where we started */
+ if ((val == 0) && (workq == nworkq))
+ break;
+ }
+ if (kernel_workq_count >= KERNEL_WORKQ_ELEM_MAX)
+ break;
+ }
+ /* nothing found to run? */
+ if (found == 0)
+ break;
+ }
+ workqueue_list_unlock();
+}
+
+static int
+post_nextworkitem(pthread_workqueue_t workq)
+{
+ int error, prio;
+ pthread_workitem_t witem;
+ pthread_workqueue_head_t headp;
+ void (*func)(pthread_workqueue_t, void *);
+
+ if ((workq->flags & PTHREAD_WORKQ_SUSPEND) == PTHREAD_WORKQ_SUSPEND) {
+ return(0);
+ }
+#if WQ_TRACE
+ __kdebug_trace(0x900809c, workq, workq->item_listhead.tqh_first, 0, 1, 0);
+#endif
+ if (TAILQ_EMPTY(&workq->item_listhead)) {
+ return(0);
+ }
+ if ((workq->flags & PTHREAD_WORKQ_BARRIER_ON) == PTHREAD_WORKQ_BARRIER_ON)
+ return(0);
+
+ witem = TAILQ_FIRST(&workq->item_listhead);
+ headp = workq->headp;
+#if WQ_TRACE
+ __kdebug_trace(0x900809c, workq, witem, 0, 0xee, 0);
+#endif
+ if ((witem->flags & PTH_WQITEM_BARRIER) == PTH_WQITEM_BARRIER) {
+#if WQ_TRACE
+ __kdebug_trace(0x9000064, workq, 0, 0, 2, 0);
+#endif
+
+ if ((witem->flags & PTH_WQITEM_APPLIED) != 0) {
+ return(0);
+ }
+ /* Also barrier when nothing is there needs to be handled */
+ /* Nothing to wait for */
+ if (workq->kq_count != 0) {
+ witem->flags |= PTH_WQITEM_APPLIED;
+ workq->flags |= PTHREAD_WORKQ_BARRIER_ON;
+ workq->barrier_count = workq->kq_count;
+#if WQ_TRACE
+ __kdebug_trace(0x9000064, 1, workq->barrier_count, 0, 0, 0);
+#endif
+ return(1);
+ } else {
+#if WQ_TRACE
+ __kdebug_trace(0x9000064, 2, workq->barrier_count, 0, 0, 0);
+#endif
+ if (witem->func != NULL) {
+ /* since we are going to drop list lock */
+ witem->flags |= PTH_WQITEM_APPLIED;
+ workq->flags |= PTHREAD_WORKQ_BARRIER_ON;
+ workqueue_list_unlock();
+ func = (void (*)(pthread_workqueue_t, void *))witem->func;
+ (*func)(workq, witem->func_arg);
+#if WQ_TRACE
+ __kdebug_trace(0x9000064, 3, workq->barrier_count, 0, 0, 0);
+#endif
+ workqueue_list_lock();
+ workq->flags &= ~PTHREAD_WORKQ_BARRIER_ON;
+ }
+ TAILQ_REMOVE(&workq->item_listhead, witem, item_entry);
+#if WQ_LISTTRACE
+ __kdebug_trace(0x90080a8, workq, &workq->item_listhead, workq->item_listhead.tqh_first, workq->item_listhead.tqh_last, 0);
+#endif
+ witem->flags = 0;
+ free_workitem(witem);
+#if WQ_TRACE
+ __kdebug_trace(0x9000064, 4, workq->barrier_count, 0, 0, 0);
+#endif
+ return(1);
+ }
+ } else if ((witem->flags & PTH_WQITEM_DESTROY) == PTH_WQITEM_DESTROY) {
+#if WQ_TRACE
+ __kdebug_trace(0x9000068, 1, workq->kq_count, 0, 0, 0);
+#endif
+ if ((witem->flags & PTH_WQITEM_APPLIED) != 0) {
+ return(0);
+ }
+ witem->flags |= PTH_WQITEM_APPLIED;
+ workq->flags |= (PTHREAD_WORKQ_BARRIER_ON | PTHREAD_WORKQ_TERM_ON);
+ workq->barrier_count = workq->kq_count;
+ workq->term_callback = (void (*)(struct _pthread_workqueue *,void *))witem->func;
+ workq->term_callarg = witem->func_arg;
+ TAILQ_REMOVE(&workq->item_listhead, witem, item_entry);
+#if WQ_LISTTRACE
+ __kdebug_trace(0x90080a8, workq, &workq->item_listhead, workq->item_listhead.tqh_first, workq->item_listhead.tqh_last, 0);
+#endif
+ if ((TAILQ_EMPTY(&workq->item_listhead)) && (workq->kq_count == 0)) {
+ if (!(TAILQ_EMPTY(&workq->item_kernhead))) {
+#if WQ_TRACE
+ __kdebug_trace(0x900006c, workq, workq->kq_count, 0, 0xff, 0);
+#endif
+ }
+ witem->flags = 0;
+ free_workitem(witem);
+ workq->flags |= PTHREAD_WORKQ_DESTROYED;
+#if WQ_TRACE
+ __kdebug_trace(0x900006c, workq, workq->kq_count, 0, 1, 0);
+#endif
+ headp = __pthread_wq_head_tbl[workq->queueprio];
+ if (headp->next_workq == workq) {
+ headp->next_workq = TAILQ_NEXT(workq, wq_list);
+ if (headp->next_workq == NULL) {
+ headp->next_workq = TAILQ_FIRST(&headp->wqhead);
+ if (headp->next_workq == workq)
+ headp->next_workq = NULL;
+ }
+ }
+ workq->sig = 0;
+ TAILQ_REMOVE(&headp->wqhead, workq, wq_list);
+ if (workq->term_callback != NULL) {
+ workqueue_list_unlock();
+ (*workq->term_callback)(workq, workq->term_callarg);
+ workqueue_list_lock();
+ }
+ free_workqueue(workq);
+ return(1);
+ } else {
+ TAILQ_INSERT_HEAD(&workq->item_listhead, witem, item_entry);
+#if WQ_LISTTRACE
+ __kdebug_trace(0x90080b0, workq, &workq->item_listhead, workq->item_listhead.tqh_first, workq->item_listhead.tqh_last, 0);
+#endif
+ }
+#if WQ_TRACE
+ __kdebug_trace(0x9000068, 2, workq->barrier_count, 0, 0, 0);
+#endif
+ return(1);
+ } else {
+#if WQ_TRACE
+ __kdebug_trace(0x9000060, witem, workq, witem->func_arg, 0xfff, 0);
+#endif
+ TAILQ_REMOVE(&workq->item_listhead, witem, item_entry);
+#if WQ_LISTTRACE
+ __kdebug_trace(0x90080a8, workq, &workq->item_listhead, workq->item_listhead.tqh_first, workq->item_listhead.tqh_last, 0);
+#endif
+ TAILQ_INSERT_TAIL(&workq->item_kernhead, witem, item_entry);
+ if ((witem->flags & PTH_WQITEM_KERN_COUNT) == 0) {
+ workq->kq_count++;
+ witem->flags |= PTH_WQITEM_KERN_COUNT;
+ }
+ OSAtomicIncrement32(&kernel_workq_count);
+ workqueue_list_unlock();
+
+ prio = workq->queueprio;
+ if (workq->overcommit != 0) {
+ prio |= WORKQUEUE_OVERCOMMIT;
+ }
+
+ if (( error =__workq_kernreturn(WQOPS_QUEUE_ADD, witem, workq->affinity, prio)) == -1) {
+ OSAtomicDecrement32(&kernel_workq_count);
+ workqueue_list_lock();
+#if WQ_TRACE
+ __kdebug_trace(0x900007c, witem, workq, witem->func_arg, workq->kq_count, 0);
+#endif
+ TAILQ_REMOVE(&workq->item_kernhead, witem, item_entry);
+ TAILQ_INSERT_HEAD(&workq->item_listhead, witem, item_entry);
+#if WQ_LISTTRACE
+ __kdebug_trace(0x90080b0, workq, &workq->item_listhead, workq->item_listhead.tqh_first, workq->item_listhead.tqh_last, 0);
+#endif
+ if ((workq->flags & (PTHREAD_WORKQ_BARRIER_ON | PTHREAD_WORKQ_TERM_ON)) != 0)
+ workq->flags |= PTHREAD_WORKQ_REQUEUED;
+ } else
+ workqueue_list_lock();
+#if WQ_TRACE
+ __kdebug_trace(0x9000060, witem, workq, witem->func_arg, workq->kq_count, 0);
+#endif
+ return(1);
+ }
+ /* noone should come here */
+#if 1
+ printf("error in logic for next workitem\n");
+ LIBC_ABORT("error in logic for next workitem");
+#endif
+ return(0);
+}
+
+void
+_pthread_wqthread(pthread_t self, mach_port_t kport, void * stackaddr, pthread_workitem_t item, int reuse)
+{
+ int ret;
+ pthread_attr_t *attrs = &_pthread_attr_default;
+ pthread_workqueue_t workq;
+#if WQ_DEBUG
+ pthread_t pself;
+#endif
+
+
+ workq = item->workq;
+ if (reuse == 0) {
+ /* reuse is set to 0, when a thread is newly created to run a workitem */
+ _pthread_struct_init(self, attrs, stackaddr, DEFAULT_STACK_SIZE, 1, 1);
+ self->wqthread = 1;
+ self->wqkillset = 0;
+ self->parentcheck = 1;
+
+ /* These are not joinable threads */
+ self->detached &= ~PTHREAD_CREATE_JOINABLE;
+ self->detached |= PTHREAD_CREATE_DETACHED;
+#if defined(__i386__) || defined(__x86_64__)
+ _pthread_set_self(self);
+#endif
+#if WQ_TRACE
+ __kdebug_trace(0x9000050, self, item, item->func_arg, 0, 0);
+#endif
+ self->kernel_thread = kport;
+ self->fun = (void *(*)(void *))item->func;
+ self->arg = item->func_arg;
+ /* Add to the pthread list */
+ LOCK(_pthread_list_lock);
+ TAILQ_INSERT_TAIL(&__pthread_head, self, plist);
+#if PTH_LISTTRACE
+ __kdebug_trace(0x900000c, self, 0, 0, 10, 0);
+#endif
+ _pthread_count++;
+ UNLOCK(_pthread_list_lock);
+
+#if defined(__i386__) || defined(__x86_64__) || defined(__arm__)
+ if( (self->thread_id = __thread_selfid()) == (__uint64_t)-1)
+ printf("Failed to set thread_id in pthread_wqthread\n");
+#endif
+
+ } else {
+ /* reuse is set to 1, when a thread is resued to run another work item */
+#if WQ_TRACE
+ __kdebug_trace(0x9000054, self, item, item->func_arg, 0, 0);
+#endif
+ /* reset all tsd from 1 to KEYS_MAX */
+ if (self == NULL)
+ LIBC_ABORT("_pthread_wqthread: pthread %p setup to be NULL", self);
+
+ self->fun = (void *(*)(void *))item->func;
+ self->arg = item->func_arg;
+ }
+
+#if WQ_DEBUG
+ if (reuse == 0) {
+ pself = pthread_self();
+ if (self != pself) {
+#if WQ_TRACE
+ __kdebug_trace(0x9000078, self, pself, item->func_arg, 0, 0);
+#endif
+ printf("pthread_self not set: pself %p, passed in %p\n", pself, self);
+ _pthread_set_self(self);
+ pself = pthread_self();
+ if (self != pself)
+ printf("(2)pthread_self not set: pself %p, passed in %p\n", pself, self);
+ pself = self;
+ }
+ } else {
+ pself = pthread_self();
+ if (self != pself) {
+ printf("(3)pthread_self not set in reuse: pself %p, passed in %p\n", pself, self);
+ LIBC_ABORT("(3)pthread_self not set in reuse: pself %p, passed in %p", pself, self);
+ }
+ }
+#endif /* WQ_DEBUG */
+
+ self->cur_workq = workq;
+ self->cur_workitem = item;
+ OSAtomicDecrement32(&kernel_workq_count);
+
+ ret = (int)(intptr_t)(*self->fun)(self->arg);
+
+ /* If we reach here without going through the above initialization path then don't go through
+ * with the teardown code path ( e.g. setjmp/longjmp ). Instead just exit this thread.
+ */
+ if(self != pthread_self()) {
+ pthread_exit(PTHREAD_CANCELED);
+ }
+
+ workqueue_exit(self, workq, item);
+
+}
+
+static void
+workqueue_exit(pthread_t self, pthread_workqueue_t workq, pthread_workitem_t item)
+{
+ pthread_attr_t *attrs = &_pthread_attr_default;
+ pthread_workitem_t baritem;
+ pthread_workqueue_head_t headp;
+ void (*func)(pthread_workqueue_t, void *);
+
+ workqueue_list_lock();
+
+ TAILQ_REMOVE(&workq->item_kernhead, item, item_entry);
+ workq->kq_count--;
+#if WQ_TRACE
+ __kdebug_trace(0x9000070, self, 1, item->func_arg, workq->kq_count, 0);
+#endif
+ item->flags = 0;
+ free_workitem(item);
+
+ if ((workq->flags & PTHREAD_WORKQ_BARRIER_ON) == PTHREAD_WORKQ_BARRIER_ON) {
+ workq->barrier_count--;
+#if WQ_TRACE
+ __kdebug_trace(0x9000084, self, workq->barrier_count, workq->kq_count, 1, 0);
+#endif
+ if (workq->barrier_count <= 0 ) {
+ /* Need to remove barrier item from the list */
+ baritem = TAILQ_FIRST(&workq->item_listhead);
+#if WQ_DEBUG
+ if ((baritem->flags & (PTH_WQITEM_BARRIER | PTH_WQITEM_DESTROY| PTH_WQITEM_APPLIED)) == 0)
+ printf("Incorect bar item being removed in barrier processing\n");
+#endif /* WQ_DEBUG */
+ /* if the front item is a barrier and call back is registered, run that */
+ if (((baritem->flags & PTH_WQITEM_BARRIER) == PTH_WQITEM_BARRIER) && (baritem->func != NULL)) {
+ workqueue_list_unlock();
+ func = (void (*)(pthread_workqueue_t, void *))baritem->func;
+ (*func)(workq, baritem->func_arg);
+ workqueue_list_lock();
+ }
+ TAILQ_REMOVE(&workq->item_listhead, baritem, item_entry);
+#if WQ_LISTTRACE
+ __kdebug_trace(0x90080a8, workq, &workq->item_listhead, workq->item_listhead.tqh_first, workq->item_listhead.tqh_last, 0);
+#endif
+ baritem->flags = 0;
+ free_workitem(baritem);
+ workq->flags &= ~PTHREAD_WORKQ_BARRIER_ON;
+#if WQ_TRACE
+ __kdebug_trace(0x9000058, self, item, item->func_arg, 0, 0);
+#endif
+ if ((workq->flags & PTHREAD_WORKQ_TERM_ON) != 0) {
+ headp = __pthread_wq_head_tbl[workq->queueprio];
+ workq->flags |= PTHREAD_WORKQ_DESTROYED;
+#if WQ_TRACE
+ __kdebug_trace(0x900006c, workq, workq->kq_count, 0, 2, 0);
+#endif
+ if (headp->next_workq == workq) {
+ headp->next_workq = TAILQ_NEXT(workq, wq_list);
+ if (headp->next_workq == NULL) {
+ headp->next_workq = TAILQ_FIRST(&headp->wqhead);
+ if (headp->next_workq == workq)
+ headp->next_workq = NULL;
+ }
+ }
+ TAILQ_REMOVE(&headp->wqhead, workq, wq_list);
+ workq->sig = 0;
+ if (workq->term_callback != NULL) {
+ workqueue_list_unlock();
+ (*workq->term_callback)(workq, workq->term_callarg);
+ workqueue_list_lock();
+ }
+ free_workqueue(workq);
+ } else {
+ /* if there are higher prio schedulabel item reset to wqreadyprio */
+ if ((workq->queueprio < wqreadyprio) && (!(TAILQ_EMPTY(&workq->item_listhead))))
+ wqreadyprio = workq->queueprio;
+ }
+ }
+ }
+#if WQ_TRACE
+ else {
+ __kdebug_trace(0x9000070, self, 2, item->func_arg, workq->barrier_count, 0);
+ }
+
+ __kdebug_trace(0x900005c, self, item, 0, 0, 0);
+#endif
+ pick_nextworkqueue_droplock();
+ _pthread_workq_return(self);
+}
+
+static void
+_pthread_workq_return(pthread_t self)
+{
+ __workq_kernreturn(WQOPS_THREAD_RETURN, NULL, 0, 0);
+
+ /* This is the way to terminate the thread */
+ _pthread_exit(self, NULL);
+}
+
+
+/* XXXXXXXXXXXXX Pthread Workqueue functions XXXXXXXXXXXXXXXXXX */
+
+int
+pthread_workqueue_create_np(pthread_workqueue_t * workqp, const pthread_workqueue_attr_t * attr)
+{
+ pthread_workqueue_t wq;
+ pthread_workqueue_head_t headp;
+
+#if defined(__arm__)
+ /* not supported under arm */
+ return(ENOTSUP);
+#endif
+#if defined(__ppc__)
+ IF_ROSETTA() {
+ return(ENOTSUP);
+ }
+#endif
+ if ((attr != NULL) && (attr->sig != PTHREAD_WORKQUEUE_ATTR_SIG)) {
+ return(EINVAL);
+ }
+
+ if (__is_threaded == 0)
+ __is_threaded = 1;
+
+ workqueue_list_lock();
+ if (kernel_workq_setup == 0) {
+ int ret = _pthread_work_internal_init();
+ if (ret != 0) {
+ workqueue_list_unlock();
+ return(ret);
+ }
+ }
+
+ wq = alloc_workqueue();
+
+ _pthread_workq_init(wq, attr);
+
+ headp = __pthread_wq_head_tbl[wq->queueprio];
+ TAILQ_INSERT_TAIL(&headp->wqhead, wq, wq_list);
+ if (headp->next_workq == NULL) {
+ headp->next_workq = TAILQ_FIRST(&headp->wqhead);
+ }
+
+ workqueue_list_unlock();
+
+ *workqp = wq;
+
+ return(0);
+}
+
+int
+pthread_workqueue_additem_np(pthread_workqueue_t workq, void ( *workitem_func)(void *), void * workitem_arg, pthread_workitem_handle_t * itemhandlep, unsigned int *gencountp)
+{
+ pthread_workitem_t witem;
+
+ if (valid_workq(workq) == 0) {
+ return(EINVAL);
+ }
+
+ workqueue_list_lock();
+
+ /*
+ * Allocate the workitem here as it can drop the lock.
+ * Also we can evaluate the workqueue state only once.
+ */
+ witem = alloc_workitem();
+ witem->func = workitem_func;
+ witem->func_arg = workitem_arg;
+ witem->flags = 0;
+ witem->workq = workq;
+ witem->item_entry.tqe_next = 0;
+ witem->item_entry.tqe_prev = 0;
+
+ /* alloc workitem can drop the lock, check the state */
+ if ((workq->flags & (PTHREAD_WORKQ_IN_TERMINATE | PTHREAD_WORKQ_DESTROYED)) != 0) {
+ free_workitem(witem);
+ workqueue_list_unlock();
+ *itemhandlep = 0;
+ return(ESRCH);
+ }
+
+ if (itemhandlep != NULL)
+ *itemhandlep = (pthread_workitem_handle_t *)witem;
+ if (gencountp != NULL)
+ *gencountp = witem->gencount;
+#if WQ_TRACE
+ __kdebug_trace(0x9008090, witem, witem->func, witem->func_arg, workq, 0);
+#endif
+ TAILQ_INSERT_TAIL(&workq->item_listhead, witem, item_entry);
+#if WQ_LISTTRACE
+ __kdebug_trace(0x90080a4, workq, &workq->item_listhead, workq->item_listhead.tqh_first, workq->item_listhead.tqh_last, 0);
+#endif
+
+ if (((workq->flags & PTHREAD_WORKQ_BARRIER_ON) == 0) && (workq->queueprio < wqreadyprio))
+ wqreadyprio = workq->queueprio;
+
+ pick_nextworkqueue_droplock();
+
+ return(0);
+}
+
+int
+pthread_workqueue_getovercommit_np(pthread_workqueue_t workq, unsigned int *ocommp)
+{
+ pthread_workitem_t witem;
+
+ if (valid_workq(workq) == 0) {
+ return(EINVAL);
+ }
+
+ if (ocommp != NULL)
+ *ocommp = workq->overcommit;
+ return(0);
+}
+
+
+/* DEPRECATED
+int pthread_workqueue_removeitem_np(pthread_workqueue_t workq, pthread_workitem_handle_t itemhandle, unsigned int gencount)
+int pthread_workqueue_addbarrier_np(pthread_workqueue_t workq, void (* callback_func)(pthread_workqueue_t, void *), void * callback_arg, pthread_workitem_handle_t *itemhandlep, unsigned int *gencountp)
+int pthread_workqueue_suspend_np(pthread_workqueue_t workq)
+int pthread_workqueue_resume_np(pthread_workqueue_t workq)
+*/
+
+#else /* !BUILDING_VARIANT ] [ */
+extern int __unix_conforming;
+extern int _pthread_count;
+extern pthread_lock_t _pthread_list_lock;
+extern void _pthread_testcancel(pthread_t thread, int isconforming);
+extern int _pthread_reap_thread(pthread_t th, mach_port_t kernel_thread, void **value_ptr, int conforming);
+
+#endif /* !BUILDING_VARIANT ] */
+
+#if __DARWIN_UNIX03
+
+__private_extern__ void
+__posix_join_cleanup(void *arg)
+{
+ pthread_t thread = (pthread_t)arg;
+ int already_exited, res;
+ void * dummy;
+ semaphore_t death;
+ mach_port_t joinport;
+ int newstyle = 0;
+
+ LOCK(thread->lock);
+ already_exited = (thread->detached & _PTHREAD_EXITED);
+
+ newstyle = thread->newstyle;
+
+#if WQ_TRACE
+ __kdebug_trace(0x900002c, thread, newstyle, 0, 0, 0);
+#endif
+ if (newstyle == 0) {
+ death = thread->death;
+ if (!already_exited){
+ thread->joiner = (struct _pthread *)NULL;
+ UNLOCK(thread->lock);
+ restore_sem_to_pool(death);
+ } else {
+ UNLOCK(thread->lock);
+ while ((res = _pthread_reap_thread(thread,
+ thread->kernel_thread,
+ &dummy, 1)) == EAGAIN)
+ {
+ sched_yield();
+ }
+ restore_sem_to_pool(death);
+
+ }
+
+ } else {
+ /* leave another thread to join */
+ thread->joiner = (struct _pthread *)NULL;
+ UNLOCK(thread->lock);
+ }
+}
+
+#endif /* __DARWIN_UNIX03 */
+
+
+/*
+ * Wait for a thread to terminate and obtain its exit value.
+ */
+/*
+int
+pthread_join(pthread_t thread,
+ void **value_ptr)
+
+moved to pthread_cancelable.c */
+
+/*
+ * Cancel a thread
+ */
+int
+pthread_cancel(pthread_t thread)
+{
+#if __DARWIN_UNIX03
+ if (__unix_conforming == 0)
+ __unix_conforming = 1;
+#endif /* __DARWIN_UNIX03 */
+
+ if (_pthread_lookup_thread(thread, NULL, 0) != 0)
+ return(ESRCH);
+
+ /* if the thread is a workqueue thread, then return error */
+ if (thread->wqthread != 0) {
+ return(ENOTSUP);
+ }
+#if __DARWIN_UNIX03
+ int state;
+
+ LOCK(thread->lock);
+ state = thread->cancel_state |= _PTHREAD_CANCEL_PENDING;
+ UNLOCK(thread->lock);
+ if (state & PTHREAD_CANCEL_ENABLE)
+ __pthread_markcancel(thread->kernel_thread);
+#else /* __DARWIN_UNIX03 */
+ thread->cancel_state |= _PTHREAD_CANCEL_PENDING;
+#endif /* __DARWIN_UNIX03 */
+ return (0);
+}
+
+void
+pthread_testcancel(void)
+{
+ pthread_t self = pthread_self();
+
+#if __DARWIN_UNIX03
+ if (__unix_conforming == 0)
+ __unix_conforming = 1;
+ _pthread_testcancel(self, 1);
+#else /* __DARWIN_UNIX03 */
+ _pthread_testcancel(self, 0);
+#endif /* __DARWIN_UNIX03 */
+
+}
+
+
+/*
+ * Query/update the cancelability 'state' of a thread
+ */
+int
+pthread_setcancelstate(int state, int *oldstate)
+{
+#if __DARWIN_UNIX03
+ if (__unix_conforming == 0) {
+ __unix_conforming = 1;
+ }
+ return (_pthread_setcancelstate_internal(state, oldstate, 1));
+#else /* __DARWIN_UNIX03 */
+ return (_pthread_setcancelstate_internal(state, oldstate, 0));
+#endif /* __DARWIN_UNIX03 */
+
+}
+
+
+
+/*
+ * Query/update the cancelability 'type' of a thread
+ */
+int
+pthread_setcanceltype(int type, int *oldtype)
+{
+ pthread_t self = pthread_self();
+
+#if __DARWIN_UNIX03
+ if (__unix_conforming == 0)
+ __unix_conforming = 1;
+#endif /* __DARWIN_UNIX03 */
+
+ if ((type != PTHREAD_CANCEL_DEFERRED) &&
+ (type != PTHREAD_CANCEL_ASYNCHRONOUS))
+ return EINVAL;
+ self = pthread_self();
+ LOCK(self->lock);
+ if (oldtype)
+ *oldtype = self->cancel_state & _PTHREAD_CANCEL_TYPE_MASK;
+ self->cancel_state &= ~_PTHREAD_CANCEL_TYPE_MASK;
+ self->cancel_state |= type;
+ UNLOCK(self->lock);
+#if !__DARWIN_UNIX03
+ _pthread_testcancel(self, 0); /* See if we need to 'die' now... */
+#endif /* __DARWIN_UNIX03 */
+ return (0);
+}
+
+int
+pthread_sigmask(int how, const sigset_t * set, sigset_t * oset)
+{
+#if __DARWIN_UNIX03
+ int err = 0;
+
+ if (__pthread_sigmask(how, set, oset) == -1) {
+ err = errno;
+ }
+ return(err);
+#else /* __DARWIN_UNIX03 */
+ return(__pthread_sigmask(how, set, oset));
+#endif /* __DARWIN_UNIX03 */
+}
+
+/*
+int
+sigwait(const sigset_t * set, int * sig)
+
+moved to pthread_cancelable.c */