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--- Libc/Libc-320/pthreads/pthread_internals.h
+++ Libc/Libc-262.3.2/pthreads/pthread_internals.h
@@ -1,27 +1,3 @@
-/*
- * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
- *
- * 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
@@ -56,11 +32,18 @@
#include <assert.h>
-#include <stddef.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <mach/mach.h>
+#include <mach/port.h>
#include <mach/mach_error.h>
+#include <mach/message.h>
+#include <mach/machine/vm_types.h>
+#include <mach/std_types.h>
+#include <mach/policy.h>
+#include <mach/sync.h>
+#include <mach/sync_policy.h>
+#include <mach/mach_traps.h>
+#include <mach/thread_switch.h>
+#include <mach/mach_host.h>
+#include <mach/mach.h> /* For generic MACH support */
#ifndef __POSIX_LIB__
@@ -68,13 +51,10 @@
#endif
#include "posix_sched.h" /* For POSIX scheduling policy & parameter */
-#include <sys/queue.h> /* For POSIX scheduling policy & parameter */
#include "pthread_machdep.h" /* Machine-dependent definitions. */
-#include "pthread_spinlock.h" /* spinlock definitions. */
-
-LIST_HEAD(__pthread_list, _pthread);
-extern struct __pthread_list __pthread_head; /* head of list of open files */
-extern pthread_lock_t _pthread_list_lock;
+
+extern kern_return_t syscall_thread_switch(mach_port_name_t, int, mach_msg_timeout_t);
+
/*
* Compiled-in limits
*/
@@ -89,12 +69,9 @@
long sig; /* Unique signature for this structure */
struct _pthread_handler_rec *cleanup_stack;
pthread_lock_t lock; /* Used for internal mutex on structure */
- u_int32_t detached:8,
- inherit:8,
- policy:8,
- pad:8;
- size_t guardsize; /* size in bytes to guard stack overflow */
- int pad0;
+ int detached;
+ int inherit;
+ int policy;
struct sched_param param;
struct _pthread_mutex *mutexes;
struct _pthread *joiner;
@@ -111,15 +88,9 @@
size_t stacksize; /* Size of the stack (is a multiple of vm_page_size and >= PTHREAD_STACK_MIN) */
mach_port_t reply_port; /* Cached MiG reply port */
void *cthread_self; /* cthread_self() if somebody calls cthread_set_self() */
- boolean_t freeStackOnExit; /* Should we free the stack when we're done? */
- LIST_ENTRY(_pthread) plist;
+ boolean_t freeStackOnExit;/* Should we free the stack when we're done? */
} *pthread_t;
-/*
- * This will cause a compile-time failure if someone moved the tsd field
- * and we need to change _PTHREAD_TSD_OFFSET in pthread_machdep.h
- */
-typedef char _need_to_change_PTHREAD_TSD_OFFSET[(_PTHREAD_TSD_OFFSET == offsetof(struct _pthread, tsd[0])) ? 0 : -1] ;
/*
* Thread attributes
@@ -128,12 +99,9 @@
{
long sig; /* Unique signature for this structure */
pthread_lock_t lock; /* Used for internal mutex on structure */
- u_int32_t detached:8,
- inherit:8,
- policy:8,
- reserved1:8;
- size_t guardsize; /* size in bytes to guard stack overflow */
- int reserved2;
+ int detached;
+ int inherit;
+ int policy;
struct sched_param param;
void *stackaddr; /* Base of the stack (is aligned on vm_page_size boundary */
size_t stacksize; /* Size of the stack (is a multiple of vm_page_size and >= PTHREAD_STACK_MIN) */
@@ -159,18 +127,19 @@
{
long sig; /* Unique signature for this structure */
pthread_lock_t lock; /* Used for internal mutex on structure */
- u_int32_t waiters; /* Count of threads waiting for this mutex */
+ int waiters:30, /* Count of threads waiting for this mutex */
+ def:1,
+ cond_lock:1; /* Is there a condition locking me? */
pthread_t owner; /* Which thread has this mutex locked */
- semaphore_t sem; /* Semaphore used for waiting */
+ mach_port_t sem; /* Semaphore used for waiting */
u_int32_t protocol:2, /* protocol */
type:2, /* mutex type */
rfu:12,
lock_count:16;
struct _pthread_mutex *next, *prev; /* List of other mutexes he owns */
struct _pthread_cond *busy; /* List of condition variables using this mutex */
- int16_t prioceiling;
- int16_t priority; /* Priority to restore when mutex unlocked */
- semaphore_t order;
+ int prioceiling;
+ int priority; /* Priority to restore when mutex unlocked */
} pthread_mutex_t;
/*
@@ -189,10 +158,10 @@
{
long sig; /* Unique signature for this structure */
pthread_lock_t lock; /* Used for internal mutex on structure */
- semaphore_t sem; /* Kernel semaphore */
+ mach_port_t sem; /* Kernel semaphore */
struct _pthread_cond *next, *prev; /* List of condition variables using mutex */
struct _pthread_mutex *busy; /* mutex associated with variable */
- u_int32_t waiters:16, /* Number of threads waiting */
+ int waiters:16, /* Number of threads waiting */
sigspending:16; /* Number of outstanding signals */
} pthread_cond_t;
@@ -248,19 +217,41 @@
#define _PTHREAD_CREATE_PARENT 4
#define _PTHREAD_EXITED 8
-#if defined(DEBUG)
-#define _PTHREAD_MUTEX_OWNER_SELF pthread_self()
-#else
-#define _PTHREAD_MUTEX_OWNER_SELF (pthread_t)0x12141968
-#endif
-#define _PTHREAD_MUTEX_OWNER_SWITCHING (pthread_t)(~0)
-
#define _PTHREAD_CANCEL_STATE_MASK 0xFE
#define _PTHREAD_CANCEL_TYPE_MASK 0xFD
#define _PTHREAD_CANCEL_PENDING 0x10 /* pthread_cancel() has been called for this thread */
extern boolean_t swtch_pri(int);
+/* Number of times to spin when the lock is unavailable and we are on a
+ multiprocessor. On a uniprocessor we yield the processor immediately. */
+#define MP_SPIN_TRIES 1000
+extern int _spin_tries;
+extern int __is_threaded;
+extern int _cpu_has_altivec;
+
+/* Internal mutex locks for data structures */
+#define TRY_LOCK(v) (!__is_threaded || _spin_lock_try((pthread_lock_t *)&(v)))
+#define LOCK(v) \
+do { \
+ if (__is_threaded) { \
+ int tries = _spin_tries; \
+ \
+ while (!_spin_lock_try((pthread_lock_t *)&(v))) { \
+ if (tries-- > 0) \
+ continue; \
+ \
+ syscall_thread_switch(THREAD_NULL, SWITCH_OPTION_DEPRESS, 1); \
+ tries = _spin_tries; \
+ } \
+ } \
+} while (0)
+#define UNLOCK(v) \
+do { \
+ if (__is_threaded) \
+ _spin_unlock((pthread_lock_t *)&(v)); \
+} while (0)
+
#ifndef ESUCCESS
#define ESUCCESS 0
#endif
@@ -274,6 +265,9 @@
/* Functions defined in machine-dependent files. */
extern vm_address_t _sp(void);
extern vm_address_t _adjust_sp(vm_address_t sp);
+extern void _spin_lock(pthread_lock_t *lockp);
+extern int _spin_lock_try(pthread_lock_t *lockp);
+extern void _spin_unlock(pthread_lock_t *lockp);
extern void _pthread_setup(pthread_t th, void (*f)(pthread_t), void *sp, int suspended, int needresume);
extern void _pthread_tsd_cleanup(pthread_t self);