[apple/libc.git] / pthreads / pthread_internals.h

/*
 * 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 
 *  
 * Permission to use, copy, modify, and distribute this software and 
 * its documentation for any purpose and without fee is hereby granted, 
 * provided that the above copyright notice appears in all copies and 
 * that both the copyright notice and this permission notice appear in 
 * supporting documentation. 
 *  
 * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE 
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
 * FOR A PARTICULAR PURPOSE. 
 *  
 * IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR 
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT, 
 * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION 
 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 
 * 
 */
/*
 * MkLinux
 */

/*
 * POSIX Threads - IEEE 1003.1c
 */

#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 <assert.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <limits.h>
#include <errno.h>
#include <mach/mach.h>
#include <mach/mach_error.h>


#ifndef __POSIX_LIB__
#define __POSIX_LIB__
#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;
/*
 * Compiled-in limits
 */
#undef _POSIX_THREAD_KEYS_MAX
#define _POSIX_THREAD_KEYS_MAX	      128

/*
 * Threads
 */
#define _PTHREAD_T
typedef struct _pthread
{
	long	       sig;	      /* Unique signature for this structure */
	struct __darwin_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 */
#if  !defined(__LP64__)
	int	       pad0;		/* for backwards compatibility */
#endif
	struct sched_param param;
	struct _pthread_mutex *mutexes;
	struct _pthread *joiner;
#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 */
	void	       *(*fun)(void*);/* Thread start routine */
        void	       *arg;	      /* Argment for thread start routine */
	int	       cancel_state;  /* Whether thread can be cancelled */
	int	       err_no;		/* thread-local errno */
	void	       *tsd[_POSIX_THREAD_KEYS_MAX];  /* Thread specific data */
        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 */
#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
 */
struct _pthread_attr_t
{
	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;
	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? */
};

/*
 * Mutex attributes
 */
#define _PTHREAD_MUTEXATTR_T
typedef struct 
{
	long sig;		     /* Unique signature for this structure */
	int prioceiling;
	u_int32_t protocol:2,		/* protocol attribute */
		type:2,			/* mutex type */
		rfu:28;
} pthread_mutexattr_t;

/*
 * 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 */
	u_int32_t      waiters;       /* Count of threads waiting for this mutex */
	pthread_t      owner;	      /* Which thread has this mutex locked */
	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 */
	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 */
	int unsupported;
} pthread_condattr_t;

/*
 * 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 */
	semaphore_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 */
		   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 */
	int             state;
	pthread_cond_t  read_signal;
	pthread_cond_t  write_signal;
	int             blocked_writers;
	int             pshared;
	int		rfu[3];
} pthread_rwlock_t;

#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
#define _PTHREAD_DEFAULT_POLICY		SCHED_OTHER
#define _PTHREAD_DEFAULT_STACKSIZE	0x80000	  /* 512K */

#define _PTHREAD_NO_SIG			0x00000000
#define _PTHREAD_MUTEX_ATTR_SIG		0x4D545841  /* 'MTXA' */
#define _PTHREAD_MUTEX_SIG		0x4D555458  /* 'MUTX' */
#define _PTHREAD_MUTEX_SIG_init		0x32AAABA7  /* [almost] ~'MUTX' */
#define _PTHREAD_COND_ATTR_SIG		0x434E4441  /* 'CNDA' */
#define _PTHREAD_COND_SIG		0x434F4E44  /* 'COND' */
#define _PTHREAD_COND_SIG_init		0x3CB0B1BB  /* [almost] ~'COND' */
#define _PTHREAD_ATTR_SIG		0x54484441  /* 'THDA' */
#define _PTHREAD_ONCE_SIG		0x4F4E4345  /* 'ONCE' */
#define _PTHREAD_ONCE_SIG_init		0x30B1BCBA  /* [almost] ~'ONCE' */
#define _PTHREAD_SIG			0x54485244  /* 'THRD' */
#define _PTHREAD_RWLOCK_ATTR_SIG	0x52574C41  /* 'RWLA' */
#define _PTHREAD_RWLOCK_SIG		0x52574C4B  /* 'RWLK' */
#define _PTHREAD_RWLOCK_SIG_init	0x2DA8B3B4  /* [almost] ~'RWLK' */

#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   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);

#ifndef ESUCCESS
#define ESUCCESS 0
#endif

#ifndef PTHREAD_MACH_CALL
#define	PTHREAD_MACH_CALL(expr, ret) (ret) = (expr)
#endif

/* Prototypes. */

/* Functions defined in machine-dependent files. */
extern vm_address_t _sp(void);
extern vm_address_t _adjust_sp(vm_address_t sp);
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 */
Commit	Line	Data
9385eb3d A	1	/*
	2	* Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
9385eb3d A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. Please obtain a copy of the License at
	10	* http://www.opensource.apple.com/apsl/ and read it before using this
	11	* file.
	12	*
	13	* The Original Code and all software distributed under the License are
	14	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	15	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	16	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	17	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	18	* Please see the License for the specific language governing rights and
	19	* limitations under the License.
	20	*
	21	* @APPLE_LICENSE_HEADER_END@
	22	*/
e9ce8d39 A	23	/*
	24	* Copyright 1996 1995 by Open Software Foundation, Inc. 1997 1996 1995 1994 1993 1992 1991
	25	* All Rights Reserved
	26	*
	27	* Permission to use, copy, modify, and distribute this software and
	28	* its documentation for any purpose and without fee is hereby granted,
	29	* provided that the above copyright notice appears in all copies and
	30	* that both the copyright notice and this permission notice appear in
	31	* supporting documentation.
	32	*
	33	* OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
	34	* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
	35	* FOR A PARTICULAR PURPOSE.
	36	*
	37	* IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
	38	* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
	39	* LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
	40	* NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
	41	* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	42	*
	43	*/
	44	/*
	45	* MkLinux
	46	*/
	47
	48	/*
	49	* POSIX Threads - IEEE 1003.1c
	50	*/
	51
	52	#ifndef _POSIX_PTHREAD_INTERNALS_H
	53	#define _POSIX_PTHREAD_INTERNALS_H
	54
3d9156a7 A	55	// suppress pthread_attr_t typedef in sys/signal.h
	56	#define _PTHREAD_ATTR_T
	57	struct _pthread_attr_t; /* forward reference */
	58	typedef struct _pthread_attr_t pthread_attr_t;
e9ce8d39 A	59
e9ce8d39 A	60	#include <assert.h>
9385eb3d A	61	#include <stddef.h>
	62	#include <stdint.h>
	63	#include <stdlib.h>
3d9156a7 A	64	#include <limits.h>
3d9156a7 A	65	#include <errno.h>
9385eb3d	66	#include <mach/mach.h>
e9ce8d39	67	#include <mach/mach_error.h>
e9ce8d39 A	68
	69
	70	#ifndef __POSIX_LIB__
	71	#define __POSIX_LIB__
	72	#endif
	73
	74	#include "posix_sched.h" /* For POSIX scheduling policy & parameter */
9385eb3d	75	#include <sys/queue.h> /* For POSIX scheduling policy & parameter */
e9ce8d39	76	#include "pthread_machdep.h" /* Machine-dependent definitions. */
9385eb3d	77	#include "pthread_spinlock.h" /* spinlock definitions. */
e9ce8d39	78
9385eb3d A	79	LIST_HEAD(__pthread_list, _pthread);
	80	extern struct __pthread_list __pthread_head; /* head of list of open files */
	81	extern pthread_lock_t _pthread_list_lock;
e9ce8d39 A	82	/*
	83	* Compiled-in limits
	84	*/
	85	#undef _POSIX_THREAD_KEYS_MAX
	86	#define _POSIX_THREAD_KEYS_MAX 128
	87
	88	/*
	89	* Threads
	90	*/
3d9156a7	91	#define _PTHREAD_T
e9ce8d39 A	92	typedef struct _pthread
	93	{
	94	long sig; /* Unique signature for this structure */
3d9156a7	95	struct __darwin_pthread_handler_rec *__cleanup_stack;
e9ce8d39	96	pthread_lock_t lock; /* Used for internal mutex on structure */
9385eb3d A	97	u_int32_t detached:8,
	98	inherit:8,
	99	policy:8,
	100	pad:8;
	101	size_t guardsize; /* size in bytes to guard stack overflow */
3d9156a7 A	102	#if !defined(__LP64__)
	103	int pad0; /* for backwards compatibility */
	104	#endif
e9ce8d39 A	105	struct sched_param param;
e9ce8d39 A	106	struct _pthread_mutex *mutexes;
5b2abdfb	107	struct _pthread *joiner;
3d9156a7 A	108	#if !defined(__LP64__)
	109	int pad1; /* for backwards compatibility */
	110	#endif
5b2abdfb A	111	void *exit_value;
5b2abdfb A	112	semaphore_t death; /* pthread_join() uses this to wait for death's call */
e9ce8d39 A	113	mach_port_t kernel_thread; /* kernel thread this thread is bound to */
	114	void (fun)(void);/ Thread start routine */
	115	void arg; / Argment for thread start routine */
	116	int cancel_state; /* Whether thread can be cancelled */
5b2abdfb	117	int err_no; /* thread-local errno */
e9ce8d39 A	118	void tsd[_POSIX_THREAD_KEYS_MAX]; / Thread specific data */
	119	void stackaddr; / Base of the stack (is aligned on vm_page_size boundary */
	120	size_t stacksize; /* Size of the stack (is a multiple of vm_page_size and >= PTHREAD_STACK_MIN) */
	121	mach_port_t reply_port; /* Cached MiG reply port */
3d9156a7 A	122	#if defined(__LP64__)
	123	int pad2; /* for natural alignment */
	124	#endif
	125	void cthread_self; / cthread_self() if somebody calls cthread_set_self() */
9385eb3d	126	boolean_t freeStackOnExit; /* Should we free the stack when we're done? */
3d9156a7 A	127	#if defined(__LP64__)
	128	int pad3; /* for natural alignment */
	129	#endif
9385eb3d	130	LIST_ENTRY(_pthread) plist;
e9ce8d39 A	131	} *pthread_t;
e9ce8d39 A	132
9385eb3d A	133	/*
	134	* This will cause a compile-time failure if someone moved the tsd field
	135	* and we need to change _PTHREAD_TSD_OFFSET in pthread_machdep.h
	136	*/
	137	typedef char _need_to_change_PTHREAD_TSD_OFFSET[(_PTHREAD_TSD_OFFSET == offsetof(struct _pthread, tsd[0])) ? 0 : -1] ;
e9ce8d39 A	138
	139	/*
	140	* Thread attributes
	141	*/
3d9156a7	142	struct _pthread_attr_t
e9ce8d39 A	143	{
	144	long sig; /* Unique signature for this structure */
	145	pthread_lock_t lock; /* Used for internal mutex on structure */
9385eb3d A	146	u_int32_t detached:8,
	147	inherit:8,
	148	policy:8,
	149	reserved1:8;
	150	size_t guardsize; /* size in bytes to guard stack overflow */
	151	int reserved2;
e9ce8d39 A	152	struct sched_param param;
	153	void stackaddr; / Base of the stack (is aligned on vm_page_size boundary */
	154	size_t stacksize; /* Size of the stack (is a multiple of vm_page_size and >= PTHREAD_STACK_MIN) */
	155	boolean_t freeStackOnExit;/* Should we free the stack when we exit? */
3d9156a7	156	};
59e0d9fe	157
e9ce8d39 A	158	/*
	159	* Mutex attributes
	160	*/
3d9156a7	161	#define _PTHREAD_MUTEXATTR_T
e9ce8d39 A	162	typedef struct
	163	{
	164	long sig; /* Unique signature for this structure */
	165	int prioceiling;
5b2abdfb A	166	u_int32_t protocol:2, /* protocol attribute */
	167	type:2, /* mutex type */
	168	rfu:28;
e9ce8d39 A	169	} pthread_mutexattr_t;
	170
	171	/*
	172	* Mutex variables
	173	*/
3d9156a7	174	#define _PTHREAD_MUTEX_T
e9ce8d39 A	175	typedef struct _pthread_mutex
	176	{
	177	long sig; /* Unique signature for this structure */
	178	pthread_lock_t lock; /* Used for internal mutex on structure */
9385eb3d	179	u_int32_t waiters; /* Count of threads waiting for this mutex */
e9ce8d39	180	pthread_t owner; /* Which thread has this mutex locked */
9385eb3d	181	semaphore_t sem; /* Semaphore used for waiting */
5b2abdfb A	182	u_int32_t protocol:2, /* protocol */
	183	type:2, /* mutex type */
	184	rfu:12,
	185	lock_count:16;
e9ce8d39 A	186	struct _pthread_mutex next, prev; /* List of other mutexes he owns */
e9ce8d39 A	187	struct _pthread_cond busy; / List of condition variables using this mutex */
9385eb3d A	188	int16_t prioceiling;
	189	int16_t priority; /* Priority to restore when mutex unlocked */
	190	semaphore_t order;
e9ce8d39 A	191	} pthread_mutex_t;
	192
	193	/*
	194	* Condition variable attributes
	195	*/
3d9156a7	196	#define _PTHREAD_CONDATTR_T
e9ce8d39 A	197	typedef struct
	198	{
	199	long sig; /* Unique signature for this structure */
	200	int unsupported;
	201	} pthread_condattr_t;
	202
	203	/*
	204	* Condition variables
	205	*/
3d9156a7	206	#define _PTHREAD_COND_T
e9ce8d39 A	207	typedef struct _pthread_cond
	208	{
	209	long sig; /* Unique signature for this structure */
	210	pthread_lock_t lock; /* Used for internal mutex on structure */
9385eb3d	211	semaphore_t sem; /* Kernel semaphore */
e9ce8d39 A	212	struct _pthread_cond next, prev; /* List of condition variables using mutex */
e9ce8d39 A	213	struct _pthread_mutex busy; / mutex associated with variable */
9385eb3d	214	u_int32_t waiters:16, /* Number of threads waiting */
e9ce8d39 A	215	sigspending:16; /* Number of outstanding signals */
	216	} pthread_cond_t;
	217
	218	/*
	219	* Initialization control (once) variables
	220	*/
3d9156a7	221	#define _PTHREAD_ONCE_T
e9ce8d39 A	222	typedef struct
	223	{
	224	long sig; /* Unique signature for this structure */
	225	pthread_lock_t lock; /* Used for internal mutex on structure */
	226	} pthread_once_t;
	227
3d9156a7	228	#define _PTHREAD_RWLOCKATTR_T
5b2abdfb A	229	typedef struct {
	230	long sig; /* Unique signature for this structure */
	231	int pshared;
	232	int rfu[2]; /* reserved for future use */
	233	} pthread_rwlockattr_t;
	234
3d9156a7	235	#define _PTHREAD_RWLOCK_T
5b2abdfb A	236	typedef struct {
	237	long sig;
	238	pthread_mutex_t lock; /* monitor lock */
	239	int state;
	240	pthread_cond_t read_signal;
	241	pthread_cond_t write_signal;
	242	int blocked_writers;
	243	int pshared;
	244	int rfu[3];
	245	} pthread_rwlock_t;
	246
e9ce8d39 A	247	#include "pthread.h"
e9ce8d39 A	248
3d9156a7 A	249	#if defined(__i386__) \|\| defined(__ppc64__)
	250	/*
	251	* Inside libSystem, we can use r13 or %gs directly to get access to the
	252	* thread-specific data area. The current thread is in the first slot.
	253	*/
	254	inline static pthread_t __attribute__((__pure__))
	255	_pthread_self_direct(void)
	256	{
	257	pthread_t ret;
	258	#if defined(__i386__)
	259	asm("movl %%gs:%P1, %0" : "=r" (ret) : "i" (offsetof(struct _pthread, tsd[0])));
	260	#elif defined(__ppc64__)
	261	register const pthread_t __pthread_self asm ("r13");
	262	ret = __pthread_self;
	263	#endif
	264	return ret;
	265	}
	266	#define pthread_self() _pthread_self_direct()
	267	#endif
	268
e9ce8d39 A	269	#define _PTHREAD_DEFAULT_INHERITSCHED PTHREAD_INHERIT_SCHED
	270	#define _PTHREAD_DEFAULT_PROTOCOL PTHREAD_PRIO_NONE
	271	#define _PTHREAD_DEFAULT_PRIOCEILING 0
	272	#define _PTHREAD_DEFAULT_POLICY SCHED_OTHER
	273	#define _PTHREAD_DEFAULT_STACKSIZE 0x80000 /* 512K */
	274
	275	#define _PTHREAD_NO_SIG 0x00000000
	276	#define _PTHREAD_MUTEX_ATTR_SIG 0x4D545841 /* 'MTXA' */
	277	#define _PTHREAD_MUTEX_SIG 0x4D555458 /* 'MUTX' */
	278	#define _PTHREAD_MUTEX_SIG_init 0x32AAABA7 /* [almost] ~'MUTX' */
5b2abdfb	279	#define _PTHREAD_COND_ATTR_SIG 0x434E4441 /* 'CNDA' */
e9ce8d39 A	280	#define _PTHREAD_COND_SIG 0x434F4E44 /* 'COND' */
	281	#define _PTHREAD_COND_SIG_init 0x3CB0B1BB /* [almost] ~'COND' */
	282	#define _PTHREAD_ATTR_SIG 0x54484441 /* 'THDA' */
	283	#define _PTHREAD_ONCE_SIG 0x4F4E4345 /* 'ONCE' */
	284	#define _PTHREAD_ONCE_SIG_init 0x30B1BCBA /* [almost] ~'ONCE' */
	285	#define _PTHREAD_SIG 0x54485244 /* 'THRD' */
5b2abdfb A	286	#define _PTHREAD_RWLOCK_ATTR_SIG 0x52574C41 /* 'RWLA' */
	287	#define _PTHREAD_RWLOCK_SIG 0x52574C4B /* 'RWLK' */
	288	#define _PTHREAD_RWLOCK_SIG_init 0x2DA8B3B4 /* [almost] ~'RWLK' */
e9ce8d39	289
e9ce8d39	290	#define _PTHREAD_CREATE_PARENT 4
5b2abdfb	291	#define _PTHREAD_EXITED 8
e9ce8d39	292
9385eb3d A	293	#if defined(DEBUG)
	294	#define _PTHREAD_MUTEX_OWNER_SELF pthread_self()
	295	#else
	296	#define _PTHREAD_MUTEX_OWNER_SELF (pthread_t)0x12141968
	297	#endif
	298	#define _PTHREAD_MUTEX_OWNER_SWITCHING (pthread_t)(~0)
	299
3d9156a7 A	300	#define _PTHREAD_CANCEL_STATE_MASK 0x01
3d9156a7 A	301	#define _PTHREAD_CANCEL_TYPE_MASK 0x02
e9ce8d39 A	302	#define _PTHREAD_CANCEL_PENDING 0x10 /* pthread_cancel() has been called for this thread */
	303
	304	extern boolean_t swtch_pri(int);
	305
e9ce8d39 A	306	#ifndef ESUCCESS
	307	#define ESUCCESS 0
	308	#endif
	309
	310	#ifndef PTHREAD_MACH_CALL
	311	#define PTHREAD_MACH_CALL(expr, ret) (ret) = (expr)
	312	#endif
	313
	314	/* Prototypes. */
	315
	316	/* Functions defined in machine-dependent files. */
	317	extern vm_address_t _sp(void);
	318	extern vm_address_t _adjust_sp(vm_address_t sp);
5b2abdfb	319	extern void _pthread_setup(pthread_t th, void (f)(pthread_t), void sp, int suspended, int needresume);
e9ce8d39 A	320
	321	extern void _pthread_tsd_cleanup(pthread_t self);
	322
	323	__private_extern__ semaphore_t new_sem_from_pool(void);
	324	__private_extern__ void restore_sem_to_pool(semaphore_t);
3d9156a7	325	__private_extern__ void _pthread_atfork_queue_init(void);
e9ce8d39	326	#endif /* _POSIX_PTHREAD_INTERNALS_H */