newlib-cygwin/newlib/libc/include/pthread.h

/*
 *  Written by Joel Sherrill <joel.sherrill@OARcorp.com>.
 *
 *  COPYRIGHT (c) 1989-2013, 2015.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  Permission to use, copy, modify, and distribute this software for any
 *  purpose without fee is hereby granted, provided that this entire notice
 *  is included in all copies of any software which is or includes a copy
 *  or modification of this software.
 *
 *  THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
 *  WARRANTY.  IN PARTICULAR,  THE AUTHOR MAKES NO REPRESENTATION
 *  OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY OF THIS
 *  SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
 */

#ifndef __PTHREAD_h
#define __PTHREAD_h

#ifdef __cplusplus
extern "C" {
#endif

#include <unistd.h>

#if defined(_POSIX_THREADS)

#include <sys/types.h>
#include <time.h>
#include <sched.h>
#include <sys/cdefs.h>

struct _pthread_cleanup_context {
  void (*_routine)(void *);
  void *_arg;
  int _canceltype;
  struct _pthread_cleanup_context *_previous;
};

/* Register Fork Handlers */
int	_EXFUN(pthread_atfork,(void (*prepare)(void), void (*parent)(void),
                   void (*child)(void)));
          
/* Mutex Initialization Attributes, P1003.1c/Draft 10, p. 81 */

int	_EXFUN(pthread_mutexattr_init, (pthread_mutexattr_t *__attr));
int	_EXFUN(pthread_mutexattr_destroy, (pthread_mutexattr_t *__attr));
int	_EXFUN(pthread_mutexattr_getpshared,
		(_CONST pthread_mutexattr_t *__attr, int  *__pshared));
int	_EXFUN(pthread_mutexattr_setpshared,
		(pthread_mutexattr_t *__attr, int __pshared));

#if defined(_UNIX98_THREAD_MUTEX_ATTRIBUTES)

/* Single UNIX Specification 2 Mutex Attributes types */

int _EXFUN(pthread_mutexattr_gettype,
		(_CONST pthread_mutexattr_t *__attr, int *__kind));
int _EXFUN(pthread_mutexattr_settype,
		(pthread_mutexattr_t *__attr, int __kind));

#endif

/* Initializing and Destroying a Mutex, P1003.1c/Draft 10, p. 87 */

int	_EXFUN(pthread_mutex_init,
	(pthread_mutex_t *__mutex, _CONST pthread_mutexattr_t *__attr));
int	_EXFUN(pthread_mutex_destroy, (pthread_mutex_t *__mutex));

/* This is used to statically initialize a pthread_mutex_t. Example:
  
    pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
 */

#define PTHREAD_MUTEX_INITIALIZER  ((pthread_mutex_t) 0xFFFFFFFF)

/*  Locking and Unlocking a Mutex, P1003.1c/Draft 10, p. 93
    NOTE: P1003.4b/D8 adds pthread_mutex_timedlock(), p. 29 */

int	_EXFUN(pthread_mutex_lock, (pthread_mutex_t *__mutex));
int	_EXFUN(pthread_mutex_trylock, (pthread_mutex_t *__mutex));
int	_EXFUN(pthread_mutex_unlock, (pthread_mutex_t *__mutex));

#if defined(_POSIX_TIMEOUTS)

int	_EXFUN(pthread_mutex_timedlock,
	(pthread_mutex_t *__mutex, _CONST struct timespec *__timeout));

#endif /* _POSIX_TIMEOUTS */

/* Condition Variable Initialization Attributes, P1003.1c/Draft 10, p. 96 */
 
int	_EXFUN(pthread_condattr_init, (pthread_condattr_t *__attr));
int	_EXFUN(pthread_condattr_destroy, (pthread_condattr_t *__attr));

int	_EXFUN(pthread_condattr_getclock,
		(const pthread_condattr_t *__restrict __attr,
              clockid_t *__restrict __clock_id));
int	_EXFUN(pthread_condattr_setclock,
		(pthread_condattr_t *__attr, clockid_t __clock_id));

int	_EXFUN(pthread_condattr_getpshared,
		(_CONST pthread_condattr_t *__attr, int *__pshared));
int	_EXFUN(pthread_condattr_setpshared,
		(pthread_condattr_t *__attr, int __pshared));
 
/* Initializing and Destroying a Condition Variable, P1003.1c/Draft 10, p. 87 */
 
int	_EXFUN(pthread_cond_init,
	(pthread_cond_t *__cond, _CONST pthread_condattr_t *__attr));
int	_EXFUN(pthread_cond_destroy, (pthread_cond_t *__mutex));
 
/* This is used to statically initialize a pthread_cond_t. Example:
  
    pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
 */
 
#define PTHREAD_COND_INITIALIZER  ((pthread_cond_t) 0xFFFFFFFF)
 
/* Broadcasting and Signaling a Condition, P1003.1c/Draft 10, p. 101 */
 
int	_EXFUN(pthread_cond_signal, (pthread_cond_t *__cond));
int	_EXFUN(pthread_cond_broadcast, (pthread_cond_t *__cond));
 
/* Waiting on a Condition, P1003.1c/Draft 10, p. 105 */
 
int	_EXFUN(pthread_cond_wait,
	(pthread_cond_t *__cond, pthread_mutex_t *__mutex));
 
int	_EXFUN(pthread_cond_timedwait,
		(pthread_cond_t *__cond, pthread_mutex_t *__mutex,
		_CONST struct timespec *__abstime));
 
#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)

/* Thread Creation Scheduling Attributes, P1003.1c/Draft 10, p. 120 */

int	_EXFUN(pthread_attr_setscope,
		(pthread_attr_t *__attr, int __contentionscope));
int	_EXFUN(pthread_attr_getscope,
	(_CONST pthread_attr_t *__attr, int *__contentionscope));
int	_EXFUN(pthread_attr_setinheritsched,
	(pthread_attr_t *__attr, int __inheritsched));
int	_EXFUN(pthread_attr_getinheritsched,
	(_CONST pthread_attr_t *__attr, int *__inheritsched));
int	_EXFUN(pthread_attr_setschedpolicy,
	(pthread_attr_t *__attr, int __policy));
int	_EXFUN(pthread_attr_getschedpolicy,
	(_CONST pthread_attr_t *__attr, int *__policy));

#endif /* defined(_POSIX_THREAD_PRIORITY_SCHEDULING) */

int	_EXFUN(pthread_attr_setschedparam,
	(pthread_attr_t *__attr, _CONST struct sched_param *__param));
int	_EXFUN(pthread_attr_getschedparam,
	(_CONST pthread_attr_t *__attr, struct sched_param *__param));

#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)

/* Dynamic Thread Scheduling Parameters Access, P1003.1c/Draft 10, p. 124 */

int	_EXFUN(pthread_getschedparam,
	(pthread_t __pthread, int *__policy, struct sched_param *__param));
int	_EXFUN(pthread_setschedparam,
	(pthread_t __pthread, int __policy, struct sched_param *__param));

/* Set Scheduling Priority of a Thread */
int	_EXFUN(pthread_setschedprio, (pthread_t thread, int prio));

#endif /* defined(_POSIX_THREAD_PRIORITY_SCHEDULING) */

#if defined(_POSIX_THREAD_PRIO_INHERIT) || defined(_POSIX_THREAD_PRIO_PROTECT)

/* Mutex Initialization Scheduling Attributes, P1003.1c/Draft 10, p. 128 */
 
int	_EXFUN(pthread_mutexattr_setprotocol,
	(pthread_mutexattr_t *__attr, int __protocol));
int	_EXFUN(pthread_mutexattr_getprotocol,
	(_CONST pthread_mutexattr_t *__attr, int *__protocol));
int	_EXFUN(pthread_mutexattr_setprioceiling,
	(pthread_mutexattr_t *__attr, int __prioceiling));
int	_EXFUN(pthread_mutexattr_getprioceiling,
	(_CONST pthread_mutexattr_t *__attr, int *__prioceiling));

#endif /* _POSIX_THREAD_PRIO_INHERIT || _POSIX_THREAD_PRIO_PROTECT */

#if defined(_POSIX_THREAD_PRIO_PROTECT)

/* Change the Priority Ceiling of a Mutex, P1003.1c/Draft 10, p. 131 */

int	_EXFUN(pthread_mutex_setprioceiling,
	(pthread_mutex_t *__mutex, int __prioceiling, int *__old_ceiling));
int	_EXFUN(pthread_mutex_getprioceiling,
	(pthread_mutex_t *__mutex, int *__prioceiling));

#endif /* _POSIX_THREAD_PRIO_PROTECT */

/* Thread Creation Attributes, P1003.1c/Draft 10, p, 140 */

int	_EXFUN(pthread_attr_init, (pthread_attr_t *__attr));
int	_EXFUN(pthread_attr_destroy, (pthread_attr_t *__attr));
int	_EXFUN(pthread_attr_setstack, (pthread_attr_t *attr,
	void *__stackaddr, size_t __stacksize));
int	_EXFUN(pthread_attr_getstack, (_CONST pthread_attr_t *attr,
	void **__stackaddr, size_t *__stacksize));
int	_EXFUN(pthread_attr_getstacksize,
	(_CONST pthread_attr_t *__attr, size_t *__stacksize));
int	_EXFUN(pthread_attr_setstacksize,
	(pthread_attr_t *__attr, size_t __stacksize));
int	_EXFUN(pthread_attr_getstackaddr,
	(_CONST pthread_attr_t *__attr, void **__stackaddr));
int	_EXFUN(pthread_attr_setstackaddr,
	(pthread_attr_t  *__attr, void *__stackaddr));
int	_EXFUN(pthread_attr_getdetachstate,
	(_CONST pthread_attr_t *__attr, int *__detachstate));
int	_EXFUN(pthread_attr_setdetachstate,
	(pthread_attr_t *__attr, int __detachstate));
int	_EXFUN(pthread_attr_getguardsize,
	(_CONST pthread_attr_t *__attr, size_t *__guardsize));
int	_EXFUN(pthread_attr_setguardsize,
	(pthread_attr_t *__attr, size_t __guardsize));

/* POSIX thread APIs beyond the POSIX standard but provided 
 * in GNU/Linux. They may be provided by other OSes for
 * compatibility.
 */
#if __GNU_VISIBLE
#if defined(__rtems__) 
int	_EXFUN(pthread_attr_setaffinity_np,
	(pthread_attr_t *__attr, size_t __cpusetsize, 
	const cpu_set_t *__cpuset));
int 	_EXFUN(pthread_attr_getaffinity_np,
	(const pthread_attr_t *__attr, size_t __cpusetsize,
	cpu_set_t *__cpuset));

int	_EXFUN(pthread_setaffinity_np,
	(pthread_t __id, size_t __cpusetsize, const cpu_set_t *__cpuset));
int	_EXFUN(pthread_getaffinity_np,
	(const pthread_t __id, size_t __cpusetsize, cpu_set_t *__cpuset));

int	_EXFUN(pthread_getattr_np,
	(pthread_t __id, pthread_attr_t *__attr));
#endif /* defined(__rtems__) */
#endif /* __GNU_VISIBLE */

/* Thread Creation, P1003.1c/Draft 10, p. 144 */

int	_EXFUN(pthread_create,
	(pthread_t *__pthread, _CONST pthread_attr_t  *__attr,
	void *(*__start_routine)( void * ), void *__arg));

/* Wait for Thread Termination, P1003.1c/Draft 10, p. 147 */

int	_EXFUN(pthread_join, (pthread_t __pthread, void **__value_ptr));

/* Detaching a Thread, P1003.1c/Draft 10, p. 149 */

int	_EXFUN(pthread_detach, (pthread_t __pthread));

/* Thread Termination, p1003.1c/Draft 10, p. 150 */

void	_EXFUN(pthread_exit, (void *__value_ptr)) __dead2;

/* Get Calling Thread's ID, p1003.1c/Draft 10, p. XXX */

pthread_t	_EXFUN(pthread_self, (void));

/* Compare Thread IDs, p1003.1c/Draft 10, p. 153 */

int	_EXFUN(pthread_equal, (pthread_t __t1, pthread_t __t2));

/* Retrieve ID of a Thread's CPU Time Clock */
int	_EXFUN(pthread_getcpuclockid,
		(pthread_t thread, clockid_t *clock_id));

/* Get/Set Current Thread's Concurrency Level */
int	_EXFUN(pthread_setconcurrency, (int new_level));
int	_EXFUN(pthread_getconcurrency, (void));

/* Dynamic Package Initialization */

/* This is used to statically initialize a pthread_once_t. Example:
  
    pthread_once_t once = PTHREAD_ONCE_INIT;
  
    NOTE:  This is named inconsistently -- it should be INITIALIZER.  */
 
#define PTHREAD_ONCE_INIT  { 1, 0 }  /* is initialized and not run */
 
int	_EXFUN(pthread_once,
	(pthread_once_t *__once_control, void (*__init_routine)(void)));

/* Thread-Specific Data Key Create, P1003.1c/Draft 10, p. 163 */

int	_EXFUN(pthread_key_create,
	(pthread_key_t *__key, void (*__destructor)( void * )));

/* Thread-Specific Data Management, P1003.1c/Draft 10, p. 165 */

int	_EXFUN(pthread_setspecific,
	(pthread_key_t __key, _CONST void *__value));
void *	_EXFUN(pthread_getspecific, (pthread_key_t __key));

/* Thread-Specific Data Key Deletion, P1003.1c/Draft 10, p. 167 */

int	_EXFUN(pthread_key_delete, (pthread_key_t __key));

/* Execution of a Thread, P1003.1c/Draft 10, p. 181 */

#define PTHREAD_CANCEL_ENABLE  0
#define PTHREAD_CANCEL_DISABLE 1

#define PTHREAD_CANCEL_DEFERRED 0
#define PTHREAD_CANCEL_ASYNCHRONOUS 1

#define PTHREAD_CANCELED ((void *) -1)

int	_EXFUN(pthread_cancel, (pthread_t __pthread));

/* Setting Cancelability State, P1003.1c/Draft 10, p. 183 */

int	_EXFUN(pthread_setcancelstate, (int __state, int *__oldstate));
int	_EXFUN(pthread_setcanceltype, (int __type, int *__oldtype));
void 	_EXFUN(pthread_testcancel, (void));

/* Establishing Cancellation Handlers, P1003.1c/Draft 10, p. 184 */

void	_EXFUN(_pthread_cleanup_push,
	(struct _pthread_cleanup_context *_context,
	void (*_routine)(void *), void *_arg));

void	_EXFUN(_pthread_cleanup_pop,
	(struct _pthread_cleanup_context *_context,
	int _execute));

/* It is intentional to open and close the scope in two different macros */
#define pthread_cleanup_push(_routine, _arg) \
  do { \
    struct _pthread_cleanup_context _pthread_clup_ctx; \
    _pthread_cleanup_push(&_pthread_clup_ctx, (_routine), (_arg))

#define pthread_cleanup_pop(_execute) \
    _pthread_cleanup_pop(&_pthread_clup_ctx, (_execute)); \
  } while (0)

#if __GNU_VISIBLE
void	_EXFUN(_pthread_cleanup_push_defer,
	(struct _pthread_cleanup_context *_context,
	void (*_routine)(void *), void *_arg));

void	_EXFUN(_pthread_cleanup_pop_restore,
	(struct _pthread_cleanup_context *_context,
	int _execute));

/* It is intentional to open and close the scope in two different macros */
#define pthread_cleanup_push_defer_np(_routine, _arg) \
  do { \
    struct _pthread_cleanup_context _pthread_clup_ctx; \
    _pthread_cleanup_push_defer(&_pthread_clup_ctx, (_routine), (_arg))

#define pthread_cleanup_pop_restore_np(_execute) \
    _pthread_cleanup_pop_restore(&_pthread_clup_ctx, (_execute)); \
  } while (0)
#endif /* __GNU_VISIBLE */

#if defined(_POSIX_THREAD_CPUTIME)
 
/* Accessing a Thread CPU-time Clock, P1003.4b/D8, p. 58 */
 
int	_EXFUN(pthread_getcpuclockid,
	(pthread_t __pthread_id, clockid_t *__clock_id));
 
#endif /* defined(_POSIX_THREAD_CPUTIME) */


#endif /* defined(_POSIX_THREADS) */

#if defined(_POSIX_BARRIERS)

int	_EXFUN(pthread_barrierattr_init, (pthread_barrierattr_t *__attr));
int	_EXFUN(pthread_barrierattr_destroy, (pthread_barrierattr_t *__attr));
int	_EXFUN(pthread_barrierattr_getpshared,
	(_CONST pthread_barrierattr_t *__attr, int *__pshared));
int	_EXFUN(pthread_barrierattr_setpshared,
	(pthread_barrierattr_t *__attr, int __pshared));

#define PTHREAD_BARRIER_SERIAL_THREAD -1

int	_EXFUN(pthread_barrier_init,
	(pthread_barrier_t *__barrier,
	_CONST pthread_barrierattr_t *__attr, unsigned __count));
int	_EXFUN(pthread_barrier_destroy, (pthread_barrier_t *__barrier));
int	_EXFUN(pthread_barrier_wait,(pthread_barrier_t *__barrier));

#endif /* defined(_POSIX_BARRIERS) */

#if defined(_POSIX_SPIN_LOCKS)

int	_EXFUN(pthread_spin_init,
	(pthread_spinlock_t *__spinlock, int __pshared));
int	_EXFUN(pthread_spin_destroy, (pthread_spinlock_t *__spinlock));
int	_EXFUN(pthread_spin_lock, (pthread_spinlock_t *__spinlock));
int	_EXFUN(pthread_spin_trylock, (pthread_spinlock_t *__spinlock));
int	_EXFUN(pthread_spin_unlock, (pthread_spinlock_t *__spinlock));

#endif /* defined(_POSIX_SPIN_LOCKS) */

#if defined(_POSIX_READER_WRITER_LOCKS)

/* This is used to statically initialize a pthread_rwlock_t. Example:
  
    pthread_mutex_t mutex = PTHREAD_RWLOCK_INITIALIZER;
 */

#define PTHREAD_RWLOCK_INITIALIZER  ((pthread_rwlock_t) 0xFFFFFFFF)

int	_EXFUN(pthread_rwlockattr_init, (pthread_rwlockattr_t *__attr));
int	_EXFUN(pthread_rwlockattr_destroy, (pthread_rwlockattr_t *__attr));
int	_EXFUN(pthread_rwlockattr_getpshared,
	(_CONST pthread_rwlockattr_t *__attr, int *__pshared));
int	_EXFUN(pthread_rwlockattr_setpshared,
	(pthread_rwlockattr_t *__attr, int __pshared));

int	_EXFUN(pthread_rwlock_init,
	(pthread_rwlock_t *__rwlock, _CONST pthread_rwlockattr_t *__attr));
int	_EXFUN(pthread_rwlock_destroy, (pthread_rwlock_t *__rwlock));
int	_EXFUN(pthread_rwlock_rdlock,(pthread_rwlock_t *__rwlock));
int	_EXFUN(pthread_rwlock_tryrdlock,(pthread_rwlock_t *__rwlock));
int	_EXFUN(pthread_rwlock_timedrdlock,
        (pthread_rwlock_t *__rwlock, _CONST struct timespec *__abstime));
int	_EXFUN(pthread_rwlock_unlock,(pthread_rwlock_t *__rwlock));
int	_EXFUN(pthread_rwlock_wrlock,(pthread_rwlock_t *__rwlock));
int	_EXFUN(pthread_rwlock_trywrlock,(pthread_rwlock_t *__rwlock));
int	_EXFUN(pthread_rwlock_timedwrlock,
        (pthread_rwlock_t *__rwlock, _CONST struct timespec *__abstime));

#endif /* defined(_POSIX_READER_WRITER_LOCKS) */


#ifdef __cplusplus
}
#endif

#endif
/* end of include file */