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--- Libc/Libc-498/pthreads/pthread.c
+++ Libc/Libc-320.1.3/pthreads/pthread.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
@@ -50,45 +50,26 @@
*/
#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 <sys/syscall.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
-
-
-#ifndef BUILDING_VARIANT /* [ */
-
-__private_extern__ struct __pthread_list __pthread_head = TAILQ_HEAD_INITIALIZER(__pthread_head);
-
-
+
+__private_extern__ struct __pthread_list __pthread_head = LIST_HEAD_INITIALIZER(&__pthread_head);
/* 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);
-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);
@@ -98,15 +79,6 @@
/* 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 */
@@ -118,11 +90,6 @@
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;
@@ -155,74 +122,26 @@
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);
-int _pthread_setcancelstate_internal(int state, int *oldstate, int conforming);
-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 handle_removeitem(pthread_workqueue_t workq, pthread_workitem_t item);
-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 */
-
-__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;
-struct _pthread_workqueue_head __pthread_workq3_head;
-struct _pthread_workqueue_head __pthread_workq4_head;
-pthread_workqueue_head_t __pthread_wq_head_tbl[WQ_NUM_PRIO_QS] = {&__pthread_workq0_head, &__pthread_workq1_head, &__pthread_workq2_head, &__pthread_workq3_head, &__pthread_workq4_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};
-void _pthread_wqthread(pthread_t self, mach_port_t kport, void * stackaddr, pthread_workitem_t item, int reuse);
-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, 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);
-
-/* workq_ops commands */
-#define WQOPS_QUEUE_ADD 1
-#define WQOPS_QUEUE_REMOVE 2
-#define WQOPS_THREAD_RETURN 4
-
-/*
- * Flags filed passed to bsdthread_create and back in pthread_start
-31 <---------------------------------> 0
-_________________________________________
-| flags(8) | policy(8) | importance(16) |
------------------------------------------
-*/
-void _pthread_start(pthread_t self, mach_port_t kport, void *(*fun)(void *), void * funarg, size_t stacksize, unsigned int flags);
-
-#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
-
-extern pthread_t __bsdthread_create(void (*func)(void *), void * func_arg, void * stack, pthread_t thread, unsigned int flags);
-extern int __bsdthread_terminate(void * freeaddr, size_t freesize, mach_port_t kport, mach_port_t joinsem);
-
-#if defined(__ppc__) || defined(__ppc64__)
+/*
+ * [Internal] stack support
+ */
+size_t _pthread_stack_size = 0;
+#define STACK_LOWEST(sp) ((sp) & ~__pthread_stack_mask)
+#define STACK_RESERVED (sizeof (struct _pthread))
+
+
+/* The stack grows towards lower addresses:
+ |<----------------user stack|struct _pthread|
+ ^STACK_LOWEST ^STACK_START ^STACK_BASE
+ ^STACK_SELF */
+
+#define STACK_BASE(sp) (((sp) | __pthread_stack_mask) + 1)
+#define STACK_START(stack_low) (STACK_BASE(stack_low) - STACK_RESERVED)
+#define STACK_SELF(sp) STACK_START(sp)
+
+#if defined(__ppc__)
static const vm_address_t PTHREAD_STACK_HINT = 0xF0000000;
-#elif defined(__i386__) || defined(__x86_64__)
+#elif defined(__i386__)
static const vm_address_t PTHREAD_STACK_HINT = 0xB0000000;
#else
#error Need to define a stack address hint for this architecture
@@ -238,20 +157,19 @@
_pthread_allocate_stack(pthread_attr_t *attrs, void **stack)
{
kern_return_t kr;
- vm_address_t stackaddr;
size_t guardsize;
-
+#if 1
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);
+ assert(((vm_address_t)(attrs->stackaddr) & (vm_page_size - 1)) == 0);
*stack = attrs->stackaddr;
return 0;
}
- guardsize = attrs->guardsize;
- stackaddr = PTHREAD_STACK_HINT;
- kr = vm_map(mach_task_self(), &stackaddr,
+ guardsize = attrs->guardsize;
+ *((vm_address_t *)stack) = PTHREAD_STACK_HINT;
+ kr = vm_map(mach_task_self(), (vm_address_t *)stack,
attrs->stacksize + guardsize,
vm_page_size-1,
VM_MAKE_TAG(VM_MEMORY_STACK)| VM_FLAGS_ANYWHERE , MEMORY_OBJECT_NULL,
@@ -259,7 +177,7 @@
VM_INHERIT_DEFAULT);
if (kr != KERN_SUCCESS)
kr = vm_allocate(mach_task_self(),
- &stackaddr, attrs->stacksize + guardsize,
+ (vm_address_t *)stack, attrs->stacksize + guardsize,
VM_MAKE_TAG(VM_MEMORY_STACK)| VM_FLAGS_ANYWHERE);
if (kr != KERN_SUCCESS) {
return EAGAIN;
@@ -267,166 +185,88 @@
/* 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);
+ kr = vm_protect(mach_task_self(), (vm_address_t)*stack, guardsize, FALSE, VM_PROT_NONE);
+ *stack += attrs->stacksize + guardsize;
+
+#else
+ vm_address_t cur_stack = (vm_address_t)0;
+ if (free_stacks == 0)
+ {
+ /* Allocating guard pages is done by doubling
+ * the actual stack size, since STACK_BASE() needs
+ * to have stacks aligned on stack_size. Allocating just
+ * one page takes as much memory as allocating more pages
+ * since it will remain one entry in the vm map.
+ * Besides, allocating more than one page allows tracking the
+ * overflow pattern when the overflow is bigger than one page.
+ */
+#ifndef NO_GUARD_PAGES
+# define GUARD_SIZE(a) (2*(a))
+# define GUARD_MASK(a) (((a)<<1) | 1)
+#else
+# define GUARD_SIZE(a) (a)
+# define GUARD_MASK(a) (a)
+#endif
+ while (lowest_stack > GUARD_SIZE(__pthread_stack_size))
+ {
+ lowest_stack -= GUARD_SIZE(__pthread_stack_size);
+ /* Ensure stack is there */
+ kr = vm_allocate(mach_task_self(),
+ &lowest_stack,
+ GUARD_SIZE(__pthread_stack_size),
+ FALSE);
+#ifndef NO_GUARD_PAGES
+ if (kr == KERN_SUCCESS) {
+ kr = vm_protect(mach_task_self(),
+ lowest_stack,
+ __pthread_stack_size,
+ FALSE, VM_PROT_NONE);
+ lowest_stack += __pthread_stack_size;
+ if (kr == KERN_SUCCESS)
+ break;
+ }
+#else
+ if (kr == KERN_SUCCESS)
+ break;
+#endif
+ }
+ if (lowest_stack > 0)
+ free_stacks = (vm_address_t *)lowest_stack;
+ else
+ {
+ /* Too bad. We'll just have to take what comes.
+ Use vm_map instead of vm_allocate so we can
+ specify alignment. */
+ kr = vm_map(mach_task_self(), &lowest_stack,
+ GUARD_SIZE(__pthread_stack_size),
+ GUARD_MASK(__pthread_stack_mask),
+ TRUE /* anywhere */, MEMORY_OBJECT_NULL,
+ 0, FALSE, VM_PROT_DEFAULT, VM_PROT_ALL,
+ VM_INHERIT_DEFAULT);
+ /* This really shouldn't fail and if it does I don't
+ know what to do. */
+#ifndef NO_GUARD_PAGES
+ if (kr == KERN_SUCCESS) {
+ kr = vm_protect(mach_task_self(),
+ lowest_stack,
+ __pthread_stack_size,
+ FALSE, VM_PROT_NONE);
+ lowest_stack += __pthread_stack_size;
+ }
+#endif
+ free_stacks = (vm_address_t *)lowest_stack;
+ lowest_stack = 0;
+ }
+ *free_stacks = 0; /* No other free stacks */
+ }
+ cur_stack = STACK_START((vm_address_t) free_stacks);
+ free_stacks = (vm_address_t *)*free_stacks;
+ cur_stack = _adjust_sp(cur_stack); /* Machine dependent stack fudging */
+#endif
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 WQ_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 WQ_TRACE
- __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 WQ_TRACE
- __kdebug_trace(0x9000020, freeaddr, freesize, kport, 1, 0);
-#endif
- if (thread_count <=0)
- exit(0);
- else
- __bsdthread_terminate(freeaddr, freesize, kport, joinsem);
- abort();
- } else {
-#if WQ_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 WQ_TRACE
- __kdebug_trace(0x9000010, t, 0, 0, 2, 0);
-#endif
- }
- thread_count = --_pthread_count;
- t->childexit = 1;
- UNLOCK(_pthread_list_lock);
-
- if (freestruct) {
-#if WQ_TRACE
- __kdebug_trace(0x9000008, t, 0, 0, 2, 0);
-#endif
- free(t);
- }
-
- freeaddr = 0;
- freesize = 0;
-#if WQ_TRACE
- __kdebug_trace(0x9000020, 0, 0, kport, 2, 0);
-#endif
-
- if (thread_count <=0)
- exit(0);
- else
- __bsdthread_terminate(NULL, 0, kport, joinsem);
- abort();
- } else if (freestruct) {
- t->sig = _PTHREAD_NO_SIG;
-#if WQ_TRACE
- __kdebug_trace(0x9000024, t, 0, 0, 2, 0);
-#endif
- free(t);
- }
- }
- return(res);
-}
-
-
+static pthread_attr_t _pthread_attr_default = {0};
/*
* Destroy a thread attribute structure
@@ -436,8 +276,7 @@
{
if (attr->sig == _PTHREAD_ATTR_SIG)
{
- attr->sig = 0;
- return (0);
+ return (ESUCCESS);
} else
{
return (EINVAL); /* Not an attribute structure! */
@@ -455,7 +294,7 @@
if (attr->sig == _PTHREAD_ATTR_SIG)
{
*detachstate = attr->detached;
- return (0);
+ return (ESUCCESS);
} else
{
return (EINVAL); /* Not an attribute structure! */
@@ -473,7 +312,7 @@
if (attr->sig == _PTHREAD_ATTR_SIG)
{
*inheritsched = attr->inherit;
- return (0);
+ return (ESUCCESS);
} else
{
return (EINVAL); /* Not an attribute structure! */
@@ -491,7 +330,7 @@
if (attr->sig == _PTHREAD_ATTR_SIG)
{
*param = attr->param;
- return (0);
+ return (ESUCCESS);
} else
{
return (EINVAL); /* Not an attribute structure! */
@@ -509,7 +348,7 @@
if (attr->sig == _PTHREAD_ATTR_SIG)
{
*policy = attr->policy;
- return (0);
+ return (ESUCCESS);
} else
{
return (EINVAL); /* Not an attribute structure! */
@@ -524,19 +363,17 @@
int
pthread_attr_init(pthread_attr_t *attr)
{
- attr->stacksize = DEFAULT_STACK_SIZE;
- attr->stackaddr = NULL;
+ 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->freeStackOnExit = TRUE;
attr->guardsize = vm_page_size;
- return (0);
+ return (ESUCCESS);
}
/*
@@ -553,7 +390,7 @@
(detachstate == PTHREAD_CREATE_DETACHED))
{
attr->detached = detachstate;
- return (0);
+ return (ESUCCESS);
} else
{
return (EINVAL);
@@ -578,7 +415,7 @@
(inheritsched == PTHREAD_EXPLICIT_SCHED))
{
attr->inherit = inheritsched;
- return (0);
+ return (ESUCCESS);
} else
{
return (EINVAL);
@@ -601,8 +438,7 @@
{
/* TODO: Validate sched_param fields */
attr->param = *param;
- attr->schedset = 1;
- return (0);
+ return (ESUCCESS);
} else
{
return (EINVAL); /* Not an attribute structure! */
@@ -624,8 +460,7 @@
(policy == SCHED_FIFO))
{
attr->policy = policy;
- attr->schedset = 1;
- return (0);
+ return (ESUCCESS);
} else
{
return (EINVAL);
@@ -647,7 +482,7 @@
if (attr->sig == _PTHREAD_ATTR_SIG) {
if (scope == PTHREAD_SCOPE_SYSTEM) {
/* No attribute yet for the scope */
- return (0);
+ return (ESUCCESS);
} else if (scope == PTHREAD_SCOPE_PROCESS) {
return (ENOTSUP);
}
@@ -660,12 +495,12 @@
* We currently only provide PTHREAD_SCOPE_SYSTEM
*/
int
-pthread_attr_getscope(const pthread_attr_t *attr,
+pthread_attr_getscope(pthread_attr_t *attr,
int *scope)
{
if (attr->sig == _PTHREAD_ATTR_SIG) {
*scope = PTHREAD_SCOPE_SYSTEM;
- return (0);
+ return (ESUCCESS);
}
return (EINVAL); /* Not an attribute structure! */
}
@@ -676,7 +511,7 @@
{
if (attr->sig == _PTHREAD_ATTR_SIG) {
*stackaddr = attr->stackaddr;
- return (0);
+ return (ESUCCESS);
} else {
return (EINVAL); /* Not an attribute structure! */
}
@@ -685,11 +520,10 @@
int
pthread_attr_setstackaddr(pthread_attr_t *attr, void *stackaddr)
{
- if ((attr->sig == _PTHREAD_ATTR_SIG) && (((uintptr_t)stackaddr % vm_page_size) == 0)) {
+ if ((attr->sig == _PTHREAD_ATTR_SIG) && (((vm_offset_t)stackaddr & (vm_page_size - 1)) == 0)) {
attr->stackaddr = stackaddr;
- attr->freeStackOnExit = 0;
- attr->fastpath = 0;
- return (0);
+ attr->freeStackOnExit = FALSE;
+ return (ESUCCESS);
} else {
return (EINVAL); /* Not an attribute structure! */
}
@@ -700,7 +534,7 @@
{
if (attr->sig == _PTHREAD_ATTR_SIG) {
*stacksize = attr->stacksize;
- return (0);
+ return (ESUCCESS);
} else {
return (EINVAL); /* Not an attribute structure! */
}
@@ -711,7 +545,7 @@
{
if ((attr->sig == _PTHREAD_ATTR_SIG) && ((stacksize % vm_page_size) == 0) && (stacksize >= PTHREAD_STACK_MIN)) {
attr->stacksize = stacksize;
- return (0);
+ return (ESUCCESS);
} else {
return (EINVAL); /* Not an attribute structure! */
}
@@ -721,9 +555,12 @@
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);
+ u_int32_t addr = (u_int32_t)attr->stackaddr;
+
+ addr -= attr->stacksize;
+ *stackaddr = (void *)addr;
*stacksize = attr->stacksize;
- return (0);
+ return (ESUCCESS);
} else {
return (EINVAL); /* Not an attribute structure! */
}
@@ -736,13 +573,15 @@
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);
+ (((vm_offset_t)stackaddr & (vm_page_size - 1)) == 0) &&
+ ((stacksize % vm_page_size) == 0) && (stacksize >= PTHREAD_STACK_MIN)) {
+ u_int32_t addr = (u_int32_t)stackaddr;
+
+ addr += stacksize;
+ attr->stackaddr = (void *)addr;
attr->stacksize = stacksize;
- attr->freeStackOnExit = 0;
- attr->fastpath = 0;
- return (0);
+ attr->freeStackOnExit = FALSE;
+ return (ESUCCESS);
} else {
return (EINVAL); /* Not an attribute structure! */
}
@@ -760,8 +599,7 @@
/* Guardsize of 0 is valid, ot means no guard */
if ((guardsize % vm_page_size) == 0) {
attr->guardsize = guardsize;
- attr->fastpath = 0;
- return (0);
+ return (ESUCCESS);
} else
return(EINVAL);
}
@@ -777,7 +615,7 @@
{
if (attr->sig == _PTHREAD_ATTR_SIG) {
*guardsize = attr->guardsize;
- return (0);
+ return (ESUCCESS);
}
return (EINVAL); /* Not an attribute structure! */
}
@@ -791,62 +629,7 @@
_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 = self;
- _pthread_struct_init(self, attrs, stackaddr, stacksize, 1, 1);
- 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
- 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 WQ_TRACE
- __kdebug_trace(0x900000c, self, 0, 0, 3, 0);
-#endif
- _pthread_count++;
- }
- self->childrun = 1;
- UNLOCK(_pthread_list_lock);
-#if defined(__i386__) || defined(__x86_64__)
- _pthread_set_self(self);
-#endif
-
-#if WQ_DEBUG
- pself = pthread_self();
- if (self != pself)
- abort();
-#endif
-#if WQ_TRACE
- __kdebug_trace(0x9000030, self, pflags, 0, 0, 0);
-#endif
-
- _pthread_exit(self, (self->fun)(self->arg));
+ pthread_exit((self->fun)(self->arg));
}
int
@@ -856,19 +639,12 @@
const mach_port_t kernel_thread)
{
int res;
- res = 0;
+ res = ESUCCESS;
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;
@@ -877,16 +653,16 @@
t->inherit = attrs->inherit;
t->policy = attrs->policy;
t->param = attrs->param;
- t->freeStackOnExit = attrs->freeStackOnExit;
+ 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->plist.le_next = (struct _pthread *)0;
+ t->plist.le_prev = (struct _pthread **)0;
t->cancel_state = PTHREAD_CANCEL_ENABLE | PTHREAD_CANCEL_DEFERRED;
- t->__cleanup_stack = (struct __darwin_pthread_handler_rec *)NULL;
+ t->cleanup_stack = (struct _pthread_handler_rec *)NULL;
t->death = SEMAPHORE_NULL;
if (kernel_thread != MACH_PORT_NULL)
@@ -895,59 +671,6 @@
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)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)t;
-
- /* if allocated from kernel set values appropriately */
- t->stacksize = stacksize;
- t->stackaddr = stackaddr;
- t->freeStackOnExit = 1;
- t->freeaddr = 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)
@@ -969,67 +692,25 @@
mach_port_t
pthread_mach_thread_np(pthread_t t)
{
- mach_port_t kport = MACH_PORT_NULL;
-
- if (_pthread_lookup_thread(t, &kport, 0) != 0)
- return(NULL);
-
- 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;
+ thread_t kernel_thread;
+
+ /* Wait for the creator to initialize it */
+ while ((kernel_thread = t->kernel_thread) == MACH_PORT_NULL)
+ sched_yield();
+
+ return kernel_thread;
}
size_t
pthread_get_stacksize_np(pthread_t t)
{
- int ret;
- size_t size = 0;
-
- if (t == NULL)
- return(ESRCH);
-
- 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);
+ return t->stacksize;
}
void *
pthread_get_stackaddr_np(pthread_t t)
{
- int ret;
- void * addr = NULL;
-
- if (t == NULL)
- return(ESRCH);
-
- LOCK(_pthread_list_lock);
-
- if ((ret = _pthread_find_thread(t)) != 0) {
- UNLOCK(_pthread_list_lock);
- return(ret);
- }
- addr = t->stackaddr;
- UNLOCK(_pthread_list_lock);
-
- return(addr);
+ return t->stackaddr;
}
mach_port_t
@@ -1046,184 +727,6 @@
pthread_t self = pthread_self();
return ((self->detached & _PTHREAD_CREATE_PARENT) == _PTHREAD_CREATE_PARENT);
-}
-
-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;
- 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 WQ_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 WQ_TRACE
- __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 WQ_TRACE
- __kdebug_trace(0x9000004, t, flags, 0, 0, 0);
-#endif
-
- if ((t = __bsdthread_create(start_routine, arg, stack, t, flags)) == -1) {
- _pthread_free_pthread_onstack(t, 1, 0);
- return (EAGAIN);
- }
- 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 WQ_TRACE
- __kdebug_trace(0x9000008, t, 0, 0, 1, 0);
-#endif
- free(t);
- } else if (t->childrun == 0) {
- TAILQ_INSERT_TAIL(&__pthread_head, t, plist);
- _pthread_count++;
-#if WQ_TRACE
- __kdebug_trace(0x900000c, t, 0, 0, 1, 0);
-#endif
- UNLOCK(_pthread_list_lock);
- } else
- UNLOCK(_pthread_list_lock);
-
- *thread = t;
-
-#if WQ_TRACE
- __kdebug_trace(0x9000014, t, 0, 0, 1, 0);
-#endif
- return (0);
-
- } else {
- /* kernel allocation */
-#if WQ_TRACE
- __kdebug_trace(0x9000018, flags, 0, 0, 0, 0);
-#endif
- if ((t = __bsdthread_create(start_routine, arg, attrs->stacksize, NULL, flags)) == -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 WQ_TRACE
- __kdebug_trace(0x9000008, t, pthreadsize, 0, 2, 0);
-#endif
- vm_deallocate(self, t, pthreadsize);
- } else if (t->childrun == 0) {
- TAILQ_INSERT_TAIL(&__pthread_head, t, plist);
- _pthread_count++;
-#if WQ_TRACE
- __kdebug_trace(0x900000c, t, 0, 0, 2, 0);
-#endif
- UNLOCK(_pthread_list_lock);
- } else
- UNLOCK(_pthread_list_lock);
-
- *thread = t;
-
-#if WQ_TRACE
- __kdebug_trace(0x9000014, t, 0, 0, 2, 0);
-#endif
- return(0);
- }
- }
}
static int
@@ -1247,7 +750,7 @@
} else if (attrs->sig != _PTHREAD_ATTR_SIG) {
return EINVAL;
}
- res = 0;
+ res = ESUCCESS;
/* In default policy (ie SCHED_OTHER) only sched_priority is used. Check for
* any change in priority or policy is needed here.
@@ -1289,10 +792,7 @@
t->fun = start_routine;
/* Now set it up to execute */
LOCK(_pthread_list_lock);
- TAILQ_INSERT_TAIL(&__pthread_head, t, plist);
-#if WQ_TRACE
- __kdebug_trace(0x900000c, t, 0, 0, 5, 0);
-#endif
+ LIST_INSERT_HEAD(&__pthread_head, t, plist);
_pthread_count++;
UNLOCK(_pthread_list_lock);
_pthread_setup(t, _pthread_body, stack, suspended, needresume);
@@ -1306,7 +806,7 @@
void *(*start_routine)(void *),
void *arg)
{
- return _new_pthread_create_suspended(thread, attr, start_routine, arg, 0);
+ return _pthread_create_suspended(thread, attr, start_routine, arg, 0);
}
int
@@ -1324,22 +824,16 @@
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) {
+ if (thread->sig == _PTHREAD_SIG)
+ {
+ LOCK(thread->lock);
+ if (thread->detached & PTHREAD_CREATE_JOINABLE)
+ {
+ if (thread->detached & _PTHREAD_EXITED) {
+ UNLOCK(thread->lock);
+ pthread_join(thread, NULL);
+ return ESUCCESS;
+ } else {
semaphore_t death = thread->death;
thread->detached &= ~PTHREAD_CREATE_JOINABLE;
@@ -1347,22 +841,14 @@
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 (ESUCCESS);
}
- return(0);
+ } else {
+ UNLOCK(thread->lock);
+ return (EINVAL);
}
} else {
- UNLOCK(thread->lock);
- return (EINVAL);
+ return (ESRCH); /* Not a valid thread */
}
}
@@ -1379,19 +865,18 @@
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 */
-
- error = __pthread_kill(kport, sig);
-
- if (error == -1)
- error = errno;
- return(error);
+ if (th && (th->sig == _PTHREAD_SIG)) {
+ error = __pthread_kill(pthread_mach_thread_np(th), sig);
+ if (error == -1)
+ error = errno;
+ return(error);
+ }
+ else
+ return(ESRCH);
}
/* Announce that there are pthread resources ready to be reclaimed in a */
@@ -1399,7 +884,7 @@
/* thread underneath is terminated right away. */
static
void _pthread_become_available(pthread_t thread, mach_port_t kernel_thread) {
- pthread_reap_msg_t msg;
+ mach_msg_empty_rcv_t msg;
kern_return_t ret;
msg.header.msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_MAKE_SEND,
@@ -1407,15 +892,14 @@
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;
+ msg.header.msgh_id = (int)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) {
+static
+int _pthread_reap_thread(pthread_t th, mach_port_t kernel_thread, void **value_ptr) {
mach_port_type_t ptype;
kern_return_t ret;
task_t self;
@@ -1460,44 +944,36 @@
}
}
-
- if (value_ptr)
+ 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 = PTHREAD_CANCELED;
- th->sig = _PTHREAD_NO_SIG;
- }
-
if (th != &_thread)
free(th);
- return 0;
+ return ESUCCESS;
}
static
void _pthread_reap_threads(void)
{
- pthread_reap_msg_t msg;
+ mach_msg_empty_rcv_t msg;
kern_return_t ret;
ret = mach_msg(&msg.header, MACH_RCV_MSG|MACH_RCV_TIMEOUT, 0,
- sizeof msg, thread_recycle_port,
+ sizeof(mach_msg_empty_rcv_t), 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;
-
- if (_pthread_reap_thread(thread, kernel_thread, (void **)0, 0) == EAGAIN)
+ pthread_t thread = (pthread_t)msg.header.msgh_id;
+
+ if (_pthread_reap_thread(thread, kernel_thread, (void **)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,
+ sizeof(mach_msg_empty_rcv_t), thread_recycle_port,
MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
}
}
@@ -1512,111 +988,123 @@
/*
* Terminate a thread.
*/
-int __disable_threadsignal(int);
-
-static void
-_pthread_exit(pthread_t self, void *value_ptr)
-{
- struct __darwin_pthread_handler_rec *handler;
+void
+pthread_exit(void *value_ptr)
+{
+ struct _pthread_handler_rec *handler;
+ pthread_t self = pthread_self();
kern_return_t kern_res;
int thread_count;
- int newstyle = self->newstyle;
/* Make this thread not to receive any signals */
- __disable_threadsignal(1);
-
-#if WQ_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;
+ syscall(331,1);
+
+ 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));
+ _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);
+ LIST_REMOVE(self, plist);
+ thread_count = --_pthread_count;
+ UNLOCK(_pthread_list_lock);
+ /* with no joiner, we let become available consume our cached ref */
+ _pthread_become_available(self, pthread_mach_thread_np(self));
+ }
+
+ 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));
+ abort();
+}
+
+/*
+ * Wait for a thread to terminate and obtain its exit value.
+ */
+int
+pthread_join(pthread_t thread,
+ void **value_ptr)
+{
+ kern_return_t kern_res;
+ int res = ESUCCESS;
+
+ if (thread->sig == _PTHREAD_SIG)
+ {
+ semaphore_t death = new_sem_from_pool(); /* in case we need it */
+
+ LOCK(thread->lock);
+ if ((thread->detached & PTHREAD_CREATE_JOINABLE) &&
+ thread->death == SEMAPHORE_NULL)
+ {
+ pthread_t self = pthread_self();
+
+ assert(thread->joiner == NULL);
+ if (thread != self && (self == NULL || self->joiner != thread))
+ {
+ int already_exited = (thread->detached & _PTHREAD_EXITED);
+
+ thread->death = death;
+ thread->joiner = self;
+ UNLOCK(thread->lock);
+
+ if (!already_exited)
+ {
+ /* Wait for it to signal... */
+ do {
+ PTHREAD_MACH_CALL(semaphore_wait(death), kern_res);
+ } while (kern_res != KERN_SUCCESS);
+ }
+
+ LOCK(_pthread_list_lock);
+ LIST_REMOVE(thread, plist);
+ UNLOCK(_pthread_list_lock);
+ /* ... and wait for it to really be dead */
+ while ((res = _pthread_reap_thread(thread,
+ thread->kernel_thread,
+ value_ptr)) == EAGAIN)
+ {
+ sched_yield();
+ }
+ } else {
+ UNLOCK(thread->lock);
+ res = EDEADLK;
}
- 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 WQ_TRACE
- __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 == NULL) && (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 == NULL) {
- 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);
- }
- }
- abort();
-}
-
-void
-pthread_exit(void *value_ptr)
-{
- pthread_t self = pthread_self();
- if (self->wqthread != 0)
- workqueue_exit(self, self->cur_workq, self->cur_workitem);
- else
- _pthread_exit(self, value_ptr);
+ UNLOCK(thread->lock);
+ res = EINVAL;
+ }
+ restore_sem_to_pool(death);
+ return res;
+ }
+ return ESRCH;
}
/*
@@ -1627,24 +1115,15 @@
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);
+ if (thread->sig == _PTHREAD_SIG)
+ {
+ *policy = thread->policy;
+ *param = thread->param;
+ return (ESUCCESS);
+ } else
+ {
+ return (ESRCH); /* Not a valid thread structure */
+ }
}
/*
@@ -1660,8 +1139,10 @@
mach_msg_type_number_t count;
kern_return_t ret;
- switch (policy)
- {
+ if (thread->sig == _PTHREAD_SIG)
+ {
+ switch (policy)
+ {
case SCHED_OTHER:
bases.ts.base_priority = param->sched_priority;
base = (policy_base_t)&bases.ts;
@@ -1681,13 +1162,19 @@
break;
default:
return (EINVAL);
- }
- ret = thread_policy(pthread_mach_thread_np(thread), policy, base, count, TRUE);
- if (ret != KERN_SUCCESS)
+ }
+ ret = thread_policy(pthread_mach_thread_np(thread), policy, base, count, TRUE);
+ if (ret != KERN_SUCCESS)
+ {
return (EINVAL);
- thread->policy = policy;
- thread->param = *param;
- return (0);
+ }
+ thread->policy = policy;
+ thread->param = *param;
+ return (ESUCCESS);
+ } else
+ {
+ return (ESRCH); /* Not a valid thread structure */
+ }
}
/*
@@ -1751,17 +1238,6 @@
}
/*
- * 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
@@ -1771,35 +1247,97 @@
_spin_lock(&once_control->lock);
if (once_control->sig == _PTHREAD_ONCE_SIG_init)
{
- pthread_cleanup_push(__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! */
+ return (ESUCCESS); /* Spec defines no possible errors! */
+}
+
+/*
+ * Cancel a thread
+ */
+int
+pthread_cancel(pthread_t thread)
+{
+ if (thread->sig == _PTHREAD_SIG)
+ {
+ thread->cancel_state |= _PTHREAD_CANCEL_PENDING;
+ return (ESUCCESS);
+ } else
+ {
+ return (ESRCH);
+ }
}
/*
* Insert a cancellation point in a thread.
*/
-__private_extern__ void
-_pthread_testcancel(pthread_t thread, int isconforming)
+static void
+_pthread_testcancel(pthread_t thread)
{
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);
+ pthread_exit(0);
}
UNLOCK(thread->lock);
}
-
+void
+pthread_testcancel(void)
+{
+ pthread_t self = pthread_self();
+ _pthread_testcancel(self);
+}
+
+/*
+ * Query/update the cancelability 'state' of a thread
+ */
+int
+pthread_setcancelstate(int state, int *oldstate)
+{
+ pthread_t self = pthread_self();
+ int err = ESUCCESS;
+ LOCK(self->lock);
+ if (oldstate)
+ *oldstate = self->cancel_state & ~_PTHREAD_CANCEL_STATE_MASK;
+ if ((state == PTHREAD_CANCEL_ENABLE) || (state == PTHREAD_CANCEL_DISABLE))
+ {
+ self->cancel_state = (self->cancel_state & _PTHREAD_CANCEL_STATE_MASK) | state;
+ } else
+ {
+ err = EINVAL;
+ }
+ UNLOCK(self->lock);
+ _pthread_testcancel(self); /* See if we need to 'die' now... */
+ return (err);
+}
+
+/*
+ * Query/update the cancelability 'type' of a thread
+ */
+int
+pthread_setcanceltype(int type, int *oldtype)
+{
+ pthread_t self = pthread_self();
+ int err = ESUCCESS;
+ LOCK(self->lock);
+ if (oldtype)
+ *oldtype = self->cancel_state & ~_PTHREAD_CANCEL_TYPE_MASK;
+ if ((type == PTHREAD_CANCEL_DEFERRED) || (type == PTHREAD_CANCEL_ASYNCHRONOUS))
+ {
+ self->cancel_state = (self->cancel_state & _PTHREAD_CANCEL_TYPE_MASK) | type;
+ } else
+ {
+ err = EINVAL;
+ }
+ UNLOCK(self->lock);
+ _pthread_testcancel(self); /* See if we need to 'die' now... */
+ return (err);
+}
int
pthread_getconcurrency(void)
@@ -1810,22 +1348,21 @@
int
pthread_setconcurrency(int new_level)
{
- if (new_level < 0)
- return EINVAL;
pthread_concurrency = new_level;
- return(0);
+ return(ESUCCESS);
}
/*
* Perform package initialization - called automatically when application starts
*/
-__private_extern__ int
+static int
pthread_init(void)
{
pthread_attr_t *attrs;
pthread_t thread;
kern_return_t kr;
+ host_basic_info_data_t basic_info;
host_priority_info_data_t priority_info;
host_info_t info;
host_flavor_t flavor;
@@ -1833,10 +1370,9 @@
mach_msg_type_number_t count;
int mib[2];
size_t len;
- void *stackaddr;
-
- pthreadsize = round_page(sizeof (struct _pthread));
- count = HOST_PRIORITY_INFO_COUNT;
+ int numcpus;
+
+ count = HOST_PRIORITY_INFO_COUNT;
info = (host_info_t)&priority_info;
flavor = HOST_PRIORITY_INFO;
host = mach_host_self();
@@ -1851,60 +1387,54 @@
attrs = &_pthread_attr_default;
pthread_attr_init(attrs);
- TAILQ_INIT(&__pthread_head);
+ LIST_INIT(&__pthread_head);
LOCK_INIT(_pthread_list_lock);
thread = &_thread;
- TAILQ_INSERT_HEAD(&__pthread_head, thread, plist);
+ LIST_INSERT_HEAD(&__pthread_head, thread, plist);
_pthread_set_self(thread);
-
- /* 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());
+ _pthread_create(thread, attrs, (void *)USRSTACK, mach_thread_self());
thread->detached = PTHREAD_CREATE_JOINABLE|_PTHREAD_CREATE_PARENT;
- _init_cpu_capabilities();
- if (_NumCPUs() > 1)
- _spin_tries = MP_SPIN_TRIES;
+ /* See if we're on a multiprocessor and set _spin_tries if so. */
+ mib[0] = CTL_HW;
+ mib[1] = HW_NCPU;
+ len = sizeof(numcpus);
+ if (sysctl(mib, 2, &numcpus, &len, NULL, 0) == 0) {
+ if (numcpus > 1) {
+ _spin_tries = MP_SPIN_TRIES;
+ }
+ } else {
+ count = HOST_BASIC_INFO_COUNT;
+ info = (host_info_t)&basic_info;
+ flavor = HOST_BASIC_INFO;
+ kr = host_info(host, flavor, info, &count);
+ if (kr != KERN_SUCCESS)
+ printf("host_info failed (%d)\n", kr);
+ else {
+ if (basic_info.avail_cpus > 1)
+ _spin_tries = MP_SPIN_TRIES;
+ }
+ }
mach_port_deallocate(mach_task_self(), host);
+ _init_cpu_capabilities();
+
#if defined(__ppc__)
- IF_ROSETTA() {
- __oldstyle = 1;
- }
+
+ /* Use fsqrt instruction in sqrt() if available. */
+ if (_cpu_capabilities & kHasFsqrt) {
+ extern size_t hw_sqrt_len;
+ extern double sqrt( double );
+ extern double hw_sqrt( double );
+ extern void sys_icache_invalidate(void *, size_t);
+
+ memcpy ( (void *)sqrt, (void *)hw_sqrt, hw_sqrt_len );
+ sys_icache_invalidate((void *)sqrt, hw_sqrt_len);
+ }
#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)));
-#else
- __bsdthread_register(_pthread_start, _pthread_wqthread, round_page(sizeof(struct _pthread)));
-#endif
- }
return 0;
}
@@ -1914,9 +1444,8 @@
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;
+/* This is the "magic" that gets the initialization routine called when the application starts */
+int (*_cthread_init_routine)(void) = pthread_init;
/* Get a semaphore from the pool, growing it if necessary */
@@ -1960,1414 +1489,9 @@
/* No need to hold the pthread_list_lock as no one other than this
* thread is present at this time
*/
- TAILQ_INIT(&__pthread_head);
+ LIST_INIT(&__pthread_head);
LOCK_INIT(_pthread_list_lock);
- TAILQ_INSERT_HEAD(&__pthread_head, p, plist);
+ LIST_INSERT_HEAD(&__pthread_head, p, plist);
_pthread_count = 1;
}
-/*
- * 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 WQ_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 WQ_TRACE
- __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 = 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 WQ_TRACE
- __kdebug_trace(0x9000028, thread, 0, 0, 2, 0);
-#endif
- vm_deallocate(mach_task_self(), thread, pthreadsize);
- } else {
- thread->sig = _PTHREAD_NO_SIG;
-#if WQ_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->stacksize = DEFAULT_STACK_SIZE;
- attrp->istimeshare = 1;
- attrp->importance = 0;
- attrp->affinity = 0;
- attrp->queueprio = WORK_QUEUE_NORMALIZER;
- attrp->sig = PTHEAD_WRKQUEUE_ATTR_SIG;
- return(0);
-}
-
-int
-pthread_workqueue_attr_destroy_np(pthread_workqueue_attr_t * attr)
-{
- if (attr->sig == PTHEAD_WRKQUEUE_ATTR_SIG)
- {
- return (0);
- } else
- {
- return (EINVAL); /* Not an attribute structure! */
- }
-}
-
-#ifdef NOTYET /* [ */
-int
-pthread_workqueue_attr_getstacksize_np(const pthread_workqueue_attr_t * attr, size_t * stacksizep)
-{
- if (attr->sig == PTHEAD_WRKQUEUE_ATTR_SIG) {
- *stacksizep = attr->stacksize;
- return (0);
- } else {
- return (EINVAL); /* Not an attribute structure! */
- }
-}
-
-int
-pthread_workqueue_attr_setstacksize_np(pthread_workqueue_attr_t * attr, size_t stacksize)
-{
- if ((attr->sig == PTHEAD_WRKQUEUE_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_workqueue_attr_getthreadtimeshare_np(const pthread_workqueue_attr_t * attr, int * istimesahrep)
-{
- if (attr->sig == PTHEAD_WRKQUEUE_ATTR_SIG) {
- *istimesahrep = attr->istimeshare;
- return (0);
- } else {
- return (EINVAL); /* Not an attribute structure! */
- }
-}
-
-int
-pthread_workqueue_attr_settthreadtimeshare_np(pthread_workqueue_attr_t * attr, int istimeshare)
-{
- if (attr->sig == PTHEAD_WRKQUEUE_ATTR_SIG) {
- if (istimeshare != 0)
- attr->istimeshare = istimeshare;
- else
- attr->istimeshare = 0;
- return (0);
- } else {
- return (EINVAL); /* Not an attribute structure! */
- }
-}
-
-int
-pthread_workqueue_attr_getthreadimportance_np(const pthread_workqueue_attr_t * attr, int * importancep)
-{
- if (attr->sig == PTHEAD_WRKQUEUE_ATTR_SIG) {
- *importancep = attr->importance;
- return (0);
- } else {
- return (EINVAL); /* Not an attribute structure! */
- }
-}
-
-int
-pthread_workqueue_attr_settthreadimportance_np(pthread_workqueue_attr_t * attr, int importance)
-{
- if (attr->sig == PTHEAD_WRKQUEUE_ATTR_SIG){
- attr->importance = importance;
- return (0);
- } else {
- return (EINVAL); /* Not an attribute structure! */
- }
-}
-
-int
-pthread_workqueue_attr_getthreadaffinity_np(const pthread_workqueue_attr_t * attr, int * affinityp)
-{
- if (attr->sig == PTHEAD_WRKQUEUE_ATTR_SIG) {
- *affinityp = attr->affinity;
- return (0);
- } else {
- return (EINVAL); /* Not an attribute structure! */
- }
-}
-
-int
-pthread_workqueue_attr_settthreadaffinity_np(pthread_workqueue_attr_t * attr, int affinity)
-{
- if (attr->sig == PTHEAD_WRKQUEUE_ATTR_SIG){
- attr->affinity = affinity;
- return (0);
- } else {
- return (EINVAL); /* Not an attribute structure! */
- }
-}
-
-#endif /* NOTYET ] */
-
-int
-pthread_workqueue_attr_getqueuepriority_np(const pthread_workqueue_attr_t * attr, int * qpriop)
-{
- if (attr->sig == PTHEAD_WRKQUEUE_ATTR_SIG) {
- *qpriop = (attr->queueprio - WORK_QUEUE_NORMALIZER);
- return (0);
- } else {
- return (EINVAL); /* Not an attribute structure! */
- }
-}
-
-int
-pthread_workqueue_attr_setqueuepriority_np(pthread_workqueue_attr_t * attr, int qprio)
-{
- /* only -2 to +2 is valid */
- if ((attr->sig == PTHEAD_WRKQUEUE_ATTR_SIG) && (qprio <= 2) && (qprio >= -2)) {
- attr->queueprio = (qprio + WORK_QUEUE_NORMALIZER);
- return (0);
- } else {
- return (EINVAL); /* Not an attribute structure! */
- }
-}
-
-/* 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);
-}
-
-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)));
-#else
- __bsdthread_register(_pthread_start, _pthread_wqthread, round_page(sizeof(struct _pthread)));
-#endif
-
- _pthread_wq_attr_default.stacksize = DEFAULT_STACK_SIZE;
- _pthread_wq_attr_default.istimeshare = 1;
- _pthread_wq_attr_default.importance = 0;
- _pthread_wq_attr_default.affinity = 0;
- _pthread_wq_attr_default.queueprio = WORK_QUEUE_NORMALIZER;
- _pthread_wq_attr_default.sig = PTHEAD_WRKQUEUE_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));
- 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)
-{
- 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->stacksize = attr->stacksize;
- wq->istimeshare = attr->istimeshare;
- wq->importance = attr->importance;
- wq->affinity = attr->affinity;
- wq->queueprio = attr->queueprio;
- } else {
- wq->stacksize = DEFAULT_STACK_SIZE;
- wq->istimeshare = 1;
- wq->importance = 0;
- wq->affinity = 0;
- wq->queueprio = WORK_QUEUE_NORMALIZER;
- }
- LOCK_INIT(wq->lock);
- wq->flags = 0;
- TAILQ_INIT(&wq->item_listhead);
- TAILQ_INIT(&wq->item_kernhead);
- wq->wq_list.tqe_next = 0;
- wq->wq_list.tqe_prev = 0;
- wq->sig = PTHEAD_WRKQUEUE_SIG;
- wq->headp = __pthread_wq_head_tbl[wq->queueprio];
-}
-
-int
-valid_workq(pthread_workqueue_t workq)
-{
- if (workq->sig == PTHEAD_WRKQUEUE_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;
-
-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);
- 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;
- 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 (TAILQ_EMPTY(&workq->item_listhead)) {
- return(0);
- }
- witem = TAILQ_FIRST(&workq->item_listhead);
- headp = workq->headp;
- if ((witem->flags & PTH_WQITEM_BARRIER) == PTH_WQITEM_BARRIER) {
-
- 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) {
- workqueue_list_unlock();
- func = witem->func;
- (*func)(workq, witem->func_arg);
- workqueue_list_lock();
- }
- TAILQ_REMOVE(&workq->item_listhead, witem, item_entry);
- witem->flags = 0;
- free_workitem(witem);
- 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 = witem->func;
- workq->term_callarg = witem->func_arg;
- TAILQ_REMOVE(&workq->item_listhead, witem, item_entry);
- 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_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);
- 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();
- if (( error =__workq_ops(WQOPS_QUEUE_ADD, witem, 0)) == -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 ((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");
- abort();
-#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;
- pthread_t pself;
-
-
- 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->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 = item->func;
- self->arg = item->func_arg;
- /* Add to the pthread list */
- LOCK(_pthread_list_lock);
- TAILQ_INSERT_TAIL(&__pthread_head, self, plist);
-#if WQ_TRACE
- __kdebug_trace(0x900000c, self, 0, 0, 10, 0);
-#endif
- _pthread_count++;
- UNLOCK(_pthread_list_lock);
- } 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 */
- _pthread_tsd_reinit(self);
-
- self->fun = 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);
- abort();
- }
- }
-#endif /* WQ_DEBUG */
-
- self->cur_workq = workq;
- self->cur_workitem = item;
- OSAtomicDecrement32(&kernel_workq_count);
-
- ret = (*self->fun)(self->arg);
-
- 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 = baritem->func;
- (*func)(workq, baritem->func_arg);
- workqueue_list_lock();
- }
- TAILQ_REMOVE(&workq->item_listhead, baritem, item_entry);
- 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)
-{
- struct __darwin_pthread_handler_rec *handler;
- int value = 0;
- int * value_ptr=&value;
-
- /* set cancel state to disable and type to deferred */
- _pthread_setcancelstate_exit(self, value_ptr, __unix_conforming);
-
- /* Make this thread not to receive any signals */
- __disable_threadsignal(1);
-
- while ((handler = self->__cleanup_stack) != 0)
- {
- (handler->__routine)(handler->__arg);
- self->__cleanup_stack = handler->__next;
- }
- _pthread_tsd_cleanup(self);
-
- __workq_ops(WQOPS_THREAD_RETURN, NULL, 0);
-
- /* This is the way to terminate the thread */
- _pthread_exit(self, NULL);
-}
-
-
-/* returns 0 if it handles it, otherwise 1 */
-static int
-handle_removeitem(pthread_workqueue_t workq, pthread_workitem_t item)
-{
- pthread_workitem_t baritem;
- pthread_workqueue_head_t headp;
- void (*func)(pthread_workqueue_t, void *);
-
- if ((workq->flags & PTHREAD_WORKQ_BARRIER_ON) == PTHREAD_WORKQ_BARRIER_ON) {
- workq->barrier_count--;
- 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 = baritem->func;
- (*func)(workq, baritem->func_arg);
- workqueue_list_lock();
- }
- TAILQ_REMOVE(&workq->item_listhead, baritem, item_entry);
- baritem->flags = 0;
- free_workitem(baritem);
- item->flags = 0;
- free_workitem(item);
- workq->flags &= ~PTHREAD_WORKQ_BARRIER_ON;
-#if WQ_TRACE
- __kdebug_trace(0x9000058, pthread_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);
- pick_nextworkqueue_droplock();
- return(0);
- } else {
- /* if there are higher prio schedulabel item reset to wqreadyprio */
- if ((workq->queueprio < wqreadyprio) && (!(TAILQ_EMPTY(&workq->item_listhead))))
- wqreadyprio = workq->queueprio;
- free_workitem(item);
- pick_nextworkqueue_droplock();
- return(0);
- }
- }
- }
- return(1);
-}
-/* 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 ((attr != NULL) && (attr->sig != PTHEAD_WRKQUEUE_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_destroy_np(pthread_workqueue_t workq, void (* callback_func)(pthread_workqueue_t, void *), void * callback_arg)
-{
- pthread_workitem_t witem;
- pthread_workqueue_head_t headp;
-
- 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->item_entry.tqe_next = 0;
- witem->item_entry.tqe_prev = 0;
- witem->func = callback_func;
- witem->func_arg = callback_arg;
- witem->flags = PTH_WQITEM_DESTROY;
-
- if ((workq->flags & (PTHREAD_WORKQ_IN_TERMINATE | PTHREAD_WORKQ_TERM_ON | PTHREAD_WORKQ_DESTROYED)) == 0) {
- workq->flags |= PTHREAD_WORKQ_IN_TERMINATE;
- /* If nothing queued or running, destroy now */
- if ((TAILQ_EMPTY(&workq->item_listhead)) && (TAILQ_EMPTY(&workq->item_kernhead))) {
- workq->flags |= (PTHREAD_WORKQ_TERM_ON | PTHREAD_WORKQ_DESTROYED);
- headp = __pthread_wq_head_tbl[workq->queueprio];
- workq->term_callback = callback_func;
- workq->term_callarg = callback_arg;
- 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;
- free_workitem(witem);
- if (workq->term_callback != NULL) {
- workqueue_list_unlock();
- (*workq->term_callback)(workq, workq->term_callarg);
- workqueue_list_lock();
- }
-#if WQ_TRACE
- __kdebug_trace(0x900006c, workq, workq->kq_count, 0, 3, 0);
-#endif
- free_workqueue(workq);
- workqueue_list_unlock();
- return(0);
- }
- TAILQ_INSERT_TAIL(&workq->item_listhead, witem, item_entry);
- } else {
- free_workitem(witem);
- workqueue_list_unlock();
- return(EINPROGRESS);
- }
- workqueue_list_unlock();
- return(0);
-}
-
-
-int
-pthread_workqueue_additem_np(pthread_workqueue_t workq, void ( *workitem_func)(void *), void * workitem_arg, pthread_workitem_handle_t * itemhandlep)
-{
- 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;
- TAILQ_INSERT_TAIL(&workq->item_listhead, witem, item_entry);
- if (((workq->flags & PTHREAD_WORKQ_BARRIER_ON) == 0) && (workq->queueprio < wqreadyprio))
- wqreadyprio = workq->queueprio;
-
- pick_nextworkqueue_droplock();
-
- return(0);
-}
-
-int
-pthread_workqueue_removeitem_np(pthread_workqueue_t workq, pthread_workitem_handle_t itemhandle)
-{
- pthread_workitem_t item, baritem;
- pthread_workqueue_head_t headp;
- int error;
-
- if (valid_workq(workq) == 0) {
- return(EINVAL);
- }
-
- workqueue_list_lock();
- if ((workq->flags & (PTHREAD_WORKQ_IN_TERMINATE | PTHREAD_WORKQ_DESTROYED)) != 0) {
- workqueue_list_unlock();
- return(ESRCH);
- }
-
- TAILQ_FOREACH(item, &workq->item_listhead, item_entry) {
- if (item == (pthread_workitem_t)itemhandle) {
- TAILQ_REMOVE(&workq->item_listhead, item, item_entry);
- if ((item->flags & (PTH_WQITEM_BARRIER | PTH_WQITEM_APPLIED)) == (PTH_WQITEM_BARRIER | PTH_WQITEM_APPLIED)) {
- workq->flags &= ~PTHREAD_WORKQ_BARRIER_ON;
- workq->barrier_count = 0;
- if ((workq->queueprio < wqreadyprio) && (!(TAILQ_EMPTY(&workq->item_listhead)))) {
- wqreadyprio = workq->queueprio;
- }
- } else if ((item->flags & PTH_WQITEM_KERN_COUNT) == PTH_WQITEM_KERN_COUNT) {
- workq->kq_count--;
- item->flags |= PTH_WQITEM_REMOVED;
- if (handle_removeitem(workq, item) == 0)
- return(0);
- }
- item->flags |= PTH_WQITEM_NOTINLIST;
- free_workitem(item);
- workqueue_list_unlock();
- return(0);
- }
- }
-
- TAILQ_FOREACH(item, &workq->item_kernhead, item_entry) {
- if (item == (pthread_workitem_t)itemhandle) {
- workqueue_list_unlock();
- if ((error = __workq_ops(WQOPS_QUEUE_REMOVE, item, 0)) == 0) {
- workqueue_list_lock();
- TAILQ_REMOVE(&workq->item_kernhead, item, item_entry);
- OSAtomicDecrement32(&kernel_workq_count);
- workq->kq_count--;
- item->flags |= PTH_WQITEM_REMOVED;
- if (handle_removeitem(workq, item) != 0) {
- free_workitem(item);
- pick_nextworkqueue_droplock();
- }
- return(0);
- } else {
- workqueue_list_unlock();
- return(EBUSY);
- }
- }
- }
- workqueue_list_unlock();
- return(EINVAL);
-}
-
-
-int
-pthread_workqueue_addbarrier_np(pthread_workqueue_t workq, void (* callback_func)(pthread_workqueue_t, void *), void * callback_arg, __unused int waitforcallback, pthread_workitem_handle_t *itemhandlep)
-{
- 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->item_entry.tqe_next = 0;
- witem->item_entry.tqe_prev = 0;
- witem->func = callback_func;
- witem->func_arg = callback_arg;
- witem->flags = PTH_WQITEM_BARRIER;
-
- /* 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();
- return(ESRCH);
- }
-
- if (itemhandlep != NULL)
- *itemhandlep = (pthread_workitem_handle_t *)witem;
-
- TAILQ_INSERT_TAIL(&workq->item_listhead, witem, item_entry);
- if (((workq->flags & PTHREAD_WORKQ_BARRIER_ON) == 0) && (workq->queueprio < wqreadyprio))
- wqreadyprio = workq->queueprio;
-
- pick_nextworkqueue_droplock();
-
- return(0);
-}
-
-int
-pthread_workqueue_suspend_np(pthread_workqueue_t workq)
-{
- if (valid_workq(workq) == 0) {
- return(EINVAL);
- }
- workqueue_list_lock();
- if ((workq->flags & (PTHREAD_WORKQ_IN_TERMINATE | PTHREAD_WORKQ_DESTROYED)) != 0) {
- workqueue_list_unlock();
- return(ESRCH);
- }
-
- workq->flags |= PTHREAD_WORKQ_SUSPEND;
- workq->suspend_count++;
- workqueue_list_unlock();
- return(0);
-}
-
-int
-pthread_workqueue_resume_np(pthread_workqueue_t workq)
-{
- if (valid_workq(workq) == 0) {
- return(EINVAL);
- }
- workqueue_list_lock();
- if ((workq->flags & (PTHREAD_WORKQ_IN_TERMINATE | PTHREAD_WORKQ_DESTROYED)) != 0) {
- workqueue_list_unlock();
- return(ESRCH);
- }
-
- workq->suspend_count--;
- if (workq->suspend_count <= 0) {
- workq->flags &= ~PTHREAD_WORKQ_SUSPEND;
- if (((workq->flags & PTHREAD_WORKQ_BARRIER_ON) == 0) && (workq->queueprio < wqreadyprio))
- wqreadyprio = workq->queueprio;
-
- pick_nextworkqueue_droplock();
- } else
- workqueue_list_unlock();
-
-
- return(0);
-}
-
-#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 __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 */