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haiku/headers/posix/pthread.h
Dmytro Shynkevych 0e0f49e799 libroot: Implemented pthread barriers 
This is an implementation of pthread barriers pursuant to the relevant specification.

Barriers are essentially a special case of conditional variables,
such that all threads waiting on one are woken up when the number of
waiters reaches a number provided at the initialization of the barrier.
In view of that, this implementation mimics the implementation of pthread_cond,
except it is more specialized and self-contained.

Signed-off-by: Jérôme Duval <jerome.duval@gmail.com>
2016-12-30 11:32:04 +01:00

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/*
* Copyright 2001-2011 Haiku, Inc. All Rights Reserved.
* Distributed under the terms of the Haiku License.
*/
#ifndef _PTHREAD_H_
#define _PTHREAD_H_
#include <sched.h>
#include <stdint.h>
#include <sys/types.h>
#include <time.h>
#define PTHREAD_MUTEX_DEFAULT 0
#define PTHREAD_MUTEX_NORMAL 1
#define PTHREAD_MUTEX_ERRORCHECK 2
#define PTHREAD_MUTEX_RECURSIVE 3
#define PTHREAD_PROCESS_PRIVATE 0
#define PTHREAD_PROCESS_SHARED 1
/*
* Flags for threads and thread attributes.
*/
#define PTHREAD_DETACHED 0x1
#define PTHREAD_SCOPE_SYSTEM 0x2
#define PTHREAD_INHERIT_SCHED 0x4
#define PTHREAD_NOFLOAT 0x8
#define PTHREAD_CREATE_DETACHED PTHREAD_DETACHED
#define PTHREAD_CREATE_JOINABLE 0
#define PTHREAD_SCOPE_PROCESS 0
#define PTHREAD_EXPLICIT_SCHED 0
/*
* Flags for cancelling threads
*/
#define PTHREAD_CANCEL_ENABLE 0
#define PTHREAD_CANCEL_DISABLE 1
#define PTHREAD_CANCEL_DEFERRED 0
#define PTHREAD_CANCEL_ASYNCHRONOUS 2
#define PTHREAD_CANCELED ((void *) 1)
#define PTHREAD_ONCE_INIT { -1 }
#define PTHREAD_BARRIER_SERIAL_THREAD -1
#define PTHREAD_PRIO_NONE 0
#define PTHREAD_PRIO_INHERIT 1
#define PTHREAD_PRIO_PROTECT 2
/* private structure */
struct __pthread_cleanup_handler {
struct __pthread_cleanup_handler *previous;
void (*function)(void *argument);
void *argument;
};
#define pthread_cleanup_push(func, arg) \
do { \
struct __pthread_cleanup_handler __handler; \
__handler.function = (func); \
__handler.argument = (arg); \
__pthread_cleanup_push_handler(&__handler);
#define pthread_cleanup_pop(execute) \
if (execute) \
__handler.function(__handler.argument); \
__pthread_cleanup_pop_handler(); \
} while (0)
#ifdef __cplusplus
extern "C" {
#endif
#define PTHREAD_MUTEX_INITIALIZER \
{ PTHREAD_MUTEX_DEFAULT, 0, -42, -1, 0 }
#define PTHREAD_RECURSIVE_MUTEX_INITIALIZER \
{ PTHREAD_MUTEX_RECURSIVE, 0, -42, -1, 0 }
#define PTHREAD_COND_INITIALIZER \
{ 0, -42, NULL, 0, 0 }
/* mutex functions */
extern int pthread_mutex_destroy(pthread_mutex_t *mutex);
extern int pthread_mutex_getprioceiling(pthread_mutex_t *mutex,
int *_priorityCeiling);
extern int pthread_mutex_init(pthread_mutex_t *mutex,
const pthread_mutexattr_t *attr);
extern int pthread_mutex_lock(pthread_mutex_t *mutex);
extern int pthread_mutex_setprioceiling(pthread_mutex_t *mutex,
int newPriorityCeiling, int *_oldPriorityCeiling);
extern int pthread_mutex_timedlock(pthread_mutex_t *mutex,
const struct timespec *spec);
extern int pthread_mutex_trylock(pthread_mutex_t *mutex);
extern int pthread_mutex_unlock(pthread_mutex_t *mutex);
/* mutex attribute functions */
extern int pthread_mutexattr_destroy(pthread_mutexattr_t *mutexAttr);
extern int pthread_mutexattr_getprioceiling(pthread_mutexattr_t *mutexAttr,
int *_priorityCeiling);
extern int pthread_mutexattr_getprotocol(pthread_mutexattr_t *mutexAttr,
int *_protocol);
extern int pthread_mutexattr_getpshared(pthread_mutexattr_t *mutexAttr,
int *_processShared);
extern int pthread_mutexattr_gettype(pthread_mutexattr_t *mutexAttr,
int *_type);
extern int pthread_mutexattr_init(pthread_mutexattr_t *mutexAttr);
extern int pthread_mutexattr_setprioceiling(pthread_mutexattr_t *mutexAttr,
int priorityCeiling);
extern int pthread_mutexattr_setprotocol(pthread_mutexattr_t *mutexAttr,
int protocol);
extern int pthread_mutexattr_setpshared(pthread_mutexattr_t *mutexAttr,
int processShared);
extern int pthread_mutexattr_settype(pthread_mutexattr_t *mutexAttr, int type);
/* barrier functions */
extern int pthread_barrier_init(pthread_barrier_t *barrier,
const pthread_barrierattr_t *attr, unsigned count);
extern int pthread_barrier_destroy(pthread_barrier_t *barrier);
extern int pthread_barrier_wait(pthread_barrier_t *barrier);
/* barrier attribute functions */
extern int pthread_barrierattr_destroy(pthread_barrierattr_t *attr);
extern int pthread_barrierattr_getpshared(const pthread_barrierattr_t *attr,
int *shared);
extern int pthread_barrierattr_init(pthread_barrierattr_t *attr);
extern int pthread_barrierattr_setpshared(pthread_barrierattr_t *attr,
int shared);
/* condition variable functions */
extern int pthread_cond_destroy(pthread_cond_t *cond);
extern int pthread_cond_init(pthread_cond_t *cond,
const pthread_condattr_t *attr);
extern int pthread_cond_broadcast(pthread_cond_t *cond);
extern int pthread_cond_signal(pthread_cond_t *cond);
extern int pthread_cond_timedwait(pthread_cond_t *cond, pthread_mutex_t *mutex,
const struct timespec *abstime);
extern int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex);
/* condition variable attribute functions */
extern int pthread_condattr_destroy(pthread_condattr_t *condAttr);
extern int pthread_condattr_init(pthread_condattr_t *condAttr);
extern int pthread_condattr_getpshared(const pthread_condattr_t *condAttr,
int *processShared);
extern int pthread_condattr_setpshared(pthread_condattr_t *condAttr,
int processShared);
extern int pthread_condattr_getclock(const pthread_condattr_t *condAttr,
clockid_t *clockID);
extern int pthread_condattr_setclock(pthread_condattr_t *condAttr,
clockid_t clockID);
/* rwlock functions */
extern int pthread_rwlock_init(pthread_rwlock_t *lock,
const pthread_rwlockattr_t *attr);
extern int pthread_rwlock_destroy(pthread_rwlock_t *lock);
extern int pthread_rwlock_rdlock(pthread_rwlock_t *lock);
extern int pthread_rwlock_tryrdlock(pthread_rwlock_t *lock);
extern int pthread_rwlock_timedrdlock(pthread_rwlock_t *lock,
const struct timespec *timeout);
extern int pthread_rwlock_wrlock(pthread_rwlock_t *lock);
extern int pthread_rwlock_trywrlock(pthread_rwlock_t *lock);
extern int pthread_rwlock_timedwrlock(pthread_rwlock_t *lock,
const struct timespec *timeout);
extern int pthread_rwlock_unlock(pthread_rwlock_t *lock);
/* rwlock attribute functions */
extern int pthread_rwlockattr_init(pthread_rwlockattr_t *attr);
extern int pthread_rwlockattr_destroy(pthread_rwlockattr_t *attr);
extern int pthread_rwlockattr_getpshared(const pthread_rwlockattr_t *attr,
int *shared);
extern int pthread_rwlockattr_setpshared(pthread_rwlockattr_t *attr,
int shared);
/* spinlock functions */
extern int pthread_spin_init(pthread_spinlock_t* spinlock, int pshared);
extern int pthread_spin_destroy(pthread_spinlock_t* spinlock);
extern int pthread_spin_lock(pthread_spinlock_t* spinlock);
extern int pthread_spin_trylock(pthread_spinlock_t* spinlock);
extern int pthread_spin_unlock(pthread_spinlock_t* spinlock);
/* misc. functions */
extern int pthread_atfork(void (*prepare)(void), void (*parent)(void),
void (*child)(void));
extern int pthread_once(pthread_once_t *once_control,
void (*init_routine)(void));
/* thread attributes functions */
extern int pthread_attr_destroy(pthread_attr_t *attr);
extern int pthread_attr_init(pthread_attr_t *attr);
extern int pthread_attr_getdetachstate(const pthread_attr_t *attr,
int *detachstate);
extern int pthread_attr_setdetachstate(pthread_attr_t *attr, int detachstate);
extern int pthread_attr_getstacksize(const pthread_attr_t *attr,
size_t *stacksize);
extern int pthread_attr_setstacksize(pthread_attr_t *attr, size_t stacksize);
extern int pthread_attr_getscope(const pthread_attr_t *attr,
int *contentionScope);
extern int pthread_attr_setscope(pthread_attr_t *attr, int contentionScope);
extern int pthread_attr_getschedparam(const pthread_attr_t *attr,
struct sched_param *param);
extern int pthread_attr_setschedparam(pthread_attr_t *attr,
const struct sched_param *param);
extern int pthread_attr_getguardsize(const pthread_attr_t *attr,
size_t *guardsize);
extern int pthread_attr_setguardsize(pthread_attr_t *attr, size_t guardsize);
#if 0 /* Unimplemented attribute functions: */
/* [TPS] */
extern int pthread_attr_getinheritsched(const pthread_attr_t *attr,
int *inheritsched);
extern int pthread_attr_setinheritsched(pthread_attr_t *attr, int inheritsched);
extern int pthread_attr_getschedpolicy(const pthread_attr_t *attr,
int *policy);
extern int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy);
/* [TSA] */
extern int pthread_attr_getstackaddr(const pthread_attr_t *attr,
void **stackaddr);
extern int pthread_attr_setstackaddr(pthread_attr_t *attr, void *stackaddr);
/* [TSA TSS] */
extern int pthread_attr_getstack(const pthread_attr_t *attr,
void **stackaddr, size_t *stacksize);
extern int pthread_attr_setstack(pthread_attr_t *attr, void *stackaddr, size_t stacksize);
#endif /* 0 */
/* thread functions */
extern int pthread_create(pthread_t *thread, const pthread_attr_t *attr,
void *(*start_routine)(void*), void *arg);
extern int pthread_detach(pthread_t thread);
extern int pthread_equal(pthread_t t1, pthread_t t2);
extern void pthread_exit(void *value_ptr);
extern int pthread_join(pthread_t thread, void **_value);
extern pthread_t pthread_self(void);
extern int pthread_getconcurrency(void);
extern int pthread_setconcurrency(int newLevel);
extern int pthread_cancel(pthread_t thread);
extern int pthread_setcancelstate(int state, int *_oldState);
extern int pthread_setcanceltype(int type, int *_oldType);
extern void pthread_testcancel(void);
extern int pthread_getschedparam(pthread_t thread, int *policy,
struct sched_param *param);
extern int pthread_setschedparam(pthread_t thread, int policy,
const struct sched_param *param);
/* thread specific data functions */
extern int pthread_key_create(pthread_key_t *key,
void (*destructorFunc)(void*));
extern int pthread_key_delete(pthread_key_t key);
extern void *pthread_getspecific(pthread_key_t key);
extern int pthread_setspecific(pthread_key_t key, const void *value);
/* private functions */
extern void __pthread_cleanup_push_handler(
struct __pthread_cleanup_handler *handler);
extern struct __pthread_cleanup_handler *__pthread_cleanup_pop_handler(void);
#ifdef __cplusplus
}
#endif
#endif /* _PTHREAD_ */
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