X-Git-Url: https://git.saurik.com/apple/libc.git/blobdiff_plain/5b2abdfbf4211b6592cdd02b9507555a0ecbb04b..20d7cd4c186bcbb50f0bb56ce882b5680664d965:/pthreads/pthread_internals.h diff --git a/pthreads/pthread_internals.h b/pthreads/pthread_internals.h index 6a26786..b1a947e 100644 --- a/pthreads/pthread_internals.h +++ b/pthreads/pthread_internals.h @@ -1,3 +1,25 @@ +/* + * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved. + * + * @APPLE_LICENSE_HEADER_START@ + * + * This file contains Original Code and/or Modifications of Original Code + * as defined in and that are subject to the Apple Public Source License + * Version 2.0 (the 'License'). You may not use this file except in + * compliance with the License. Please obtain a copy of the License at + * http://www.opensource.apple.com/apsl/ and read it before using this + * file. + * + * The Original Code and all software distributed under the License are + * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, + * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. + * Please see the License for the specific language governing rights and + * limitations under the License. + * + * @APPLE_LICENSE_HEADER_END@ + */ /* * Copyright 1996 1995 by Open Software Foundation, Inc. 1997 1996 1995 1994 1993 1992 1991 * All Rights Reserved @@ -30,20 +52,19 @@ #ifndef _POSIX_PTHREAD_INTERNALS_H #define _POSIX_PTHREAD_INTERNALS_H +// suppress pthread_attr_t typedef in sys/signal.h +#define _PTHREAD_ATTR_T +struct _pthread_attr_t; /* forward reference */ +typedef struct _pthread_attr_t pthread_attr_t; #include -#include +#include +#include +#include +#include +#include +#include #include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include /* For generic MACH support */ #ifndef __POSIX_LIB__ @@ -51,10 +72,13 @@ #endif #include "posix_sched.h" /* For POSIX scheduling policy & parameter */ +#include /* For POSIX scheduling policy & parameter */ #include "pthread_machdep.h" /* Machine-dependent definitions. */ +#include "pthread_spinlock.h" /* spinlock definitions. */ -extern kern_return_t syscall_thread_switch(mach_port_name_t, int, mach_msg_timeout_t); - +LIST_HEAD(__pthread_list, _pthread); +extern struct __pthread_list __pthread_head; /* head of list of open files */ +extern pthread_lock_t _pthread_list_lock; /* * Compiled-in limits */ @@ -64,18 +88,26 @@ extern kern_return_t syscall_thread_switch(mach_port_name_t, int, mach_msg_timeo /* * Threads */ +#define _PTHREAD_T typedef struct _pthread { long sig; /* Unique signature for this structure */ - struct _pthread_handler_rec *cleanup_stack; + struct __darwin_pthread_handler_rec *__cleanup_stack; pthread_lock_t lock; /* Used for internal mutex on structure */ - int detached; - int inherit; - int policy; + u_int32_t detached:8, + inherit:8, + policy:8, + pad:8; + size_t guardsize; /* size in bytes to guard stack overflow */ +#if !defined(__LP64__) + int pad0; /* for backwards compatibility */ +#endif struct sched_param param; struct _pthread_mutex *mutexes; struct _pthread *joiner; - int pad1; +#if !defined(__LP64__) + int pad1; /* for backwards compatibility */ +#endif void *exit_value; semaphore_t death; /* pthread_join() uses this to wait for death's call */ mach_port_t kernel_thread; /* kernel thread this thread is bound to */ @@ -87,30 +119,46 @@ typedef struct _pthread 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) */ 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? */ +#if defined(__LP64__) + int pad2; /* for natural alignment */ +#endif + void *cthread_self; /* cthread_self() if somebody calls cthread_set_self() */ + boolean_t freeStackOnExit; /* Should we free the stack when we're done? */ +#if defined(__LP64__) + int pad3; /* for natural alignment */ +#endif + LIST_ENTRY(_pthread) plist; } *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 */ -typedef struct +struct _pthread_attr_t { long sig; /* Unique signature for this structure */ pthread_lock_t lock; /* Used for internal mutex on structure */ - int detached; - int inherit; - int policy; + u_int32_t detached:8, + inherit:8, + policy:8, + reserved1:8; + size_t guardsize; /* size in bytes to guard stack overflow */ + int reserved2; 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) */ boolean_t freeStackOnExit;/* Should we free the stack when we exit? */ -} pthread_attr_t; +}; /* * Mutex attributes */ +#define _PTHREAD_MUTEXATTR_T typedef struct { long sig; /* Unique signature for this structure */ @@ -123,28 +171,29 @@ typedef struct /* * Mutex variables */ +#define _PTHREAD_MUTEX_T typedef struct _pthread_mutex { long sig; /* Unique signature for this structure */ pthread_lock_t lock; /* Used for internal mutex on structure */ - int waiters:30, /* Count of threads waiting for this mutex */ - def:1, - cond_lock:1; /* Is there a condition locking me? */ + u_int32_t waiters; /* Count of threads waiting for this mutex */ pthread_t owner; /* Which thread has this mutex locked */ - mach_port_t sem; /* Semaphore used for waiting */ + semaphore_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 */ - int prioceiling; - int priority; /* Priority to restore when mutex unlocked */ + int16_t prioceiling; + int16_t priority; /* Priority to restore when mutex unlocked */ + semaphore_t order; } pthread_mutex_t; /* * Condition variable attributes */ +#define _PTHREAD_CONDATTR_T typedef struct { long sig; /* Unique signature for this structure */ @@ -154,32 +203,36 @@ typedef struct /* * Condition variables */ +#define _PTHREAD_COND_T typedef struct _pthread_cond { long sig; /* Unique signature for this structure */ pthread_lock_t lock; /* Used for internal mutex on structure */ - mach_port_t sem; /* Kernel semaphore */ + semaphore_t sem; /* Kernel semaphore */ struct _pthread_cond *next, *prev; /* List of condition variables using mutex */ struct _pthread_mutex *busy; /* mutex associated with variable */ - int waiters:16, /* Number of threads waiting */ + u_int32_t waiters:16, /* Number of threads waiting */ sigspending:16; /* Number of outstanding signals */ } pthread_cond_t; /* * Initialization control (once) variables */ +#define _PTHREAD_ONCE_T typedef struct { long sig; /* Unique signature for this structure */ pthread_lock_t lock; /* Used for internal mutex on structure */ } pthread_once_t; +#define _PTHREAD_RWLOCKATTR_T typedef struct { long sig; /* Unique signature for this structure */ int pshared; int rfu[2]; /* reserved for future use */ } pthread_rwlockattr_t; +#define _PTHREAD_RWLOCK_T typedef struct { long sig; pthread_mutex_t lock; /* monitor lock */ @@ -193,6 +246,26 @@ typedef struct { #include "pthread.h" +#if defined(__i386__) || defined(__ppc64__) +/* + * Inside libSystem, we can use r13 or %gs directly to get access to the + * thread-specific data area. The current thread is in the first slot. + */ +inline static pthread_t __attribute__((__pure__)) +_pthread_self_direct(void) +{ + pthread_t ret; +#if defined(__i386__) + asm("movl %%gs:%P1, %0" : "=r" (ret) : "i" (offsetof(struct _pthread, tsd[0]))); +#elif defined(__ppc64__) + register const pthread_t __pthread_self asm ("r13"); + ret = __pthread_self; +#endif + return ret; +} +#define pthread_self() _pthread_self_direct() +#endif + #define _PTHREAD_DEFAULT_INHERITSCHED PTHREAD_INHERIT_SCHED #define _PTHREAD_DEFAULT_PROTOCOL PTHREAD_PRIO_NONE #define _PTHREAD_DEFAULT_PRIOCEILING 0 @@ -217,41 +290,19 @@ typedef struct { #define _PTHREAD_CREATE_PARENT 4 #define _PTHREAD_EXITED 8 -#define _PTHREAD_CANCEL_STATE_MASK 0xFE -#define _PTHREAD_CANCEL_TYPE_MASK 0xFD +#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 0x01 +#define _PTHREAD_CANCEL_TYPE_MASK 0x02 #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 @@ -265,13 +316,11 @@ do { \ /* 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); __private_extern__ semaphore_t new_sem_from_pool(void); __private_extern__ void restore_sem_to_pool(semaphore_t); +__private_extern__ void _pthread_atfork_queue_init(void); #endif /* _POSIX_PTHREAD_INTERNALS_H */