mesa/src/gallium/include/pipe/p_thread.h

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/**************************************************************************
*
* Copyright 1999-2006 Brian Paul
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* Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
**************************************************************************/
/**
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* @file
*
* Thread, mutex, condition variable, barrier, semaphore and
* thread-specific data functions.
*/
#ifndef _P_THREAD2_H_
#define _P_THREAD2_H_
#include "pipe/p_compiler.h"
#include "util/u_debug.h" /* for assert */
#if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS) || defined(PIPE_OS_APPLE) || defined(PIPE_OS_HAIKU)
#include <pthread.h> /* POSIX threads headers */
#include <stdio.h> /* for perror() */
#define PIPE_THREAD_HAVE_CONDVAR
typedef pthread_t pipe_thread;
#define PIPE_THREAD_ROUTINE( name, param ) \
void *name( void *param )
static INLINE pipe_thread pipe_thread_create( void *(* routine)( void *), void *param )
{
pipe_thread thread;
if (pthread_create( &thread, NULL, routine, param ))
return 0;
return thread;
}
static INLINE int pipe_thread_wait( pipe_thread thread )
{
return pthread_join( thread, NULL );
}
static INLINE int pipe_thread_destroy( pipe_thread thread )
{
return pthread_detach( thread );
}
typedef pthread_mutex_t pipe_mutex;
typedef pthread_cond_t pipe_condvar;
#define pipe_static_mutex(mutex) \
static pipe_mutex mutex = PTHREAD_MUTEX_INITIALIZER
#define pipe_mutex_init(mutex) \
(void) pthread_mutex_init(&(mutex), NULL)
#define pipe_mutex_destroy(mutex) \
pthread_mutex_destroy(&(mutex))
#define pipe_mutex_lock(mutex) \
(void) pthread_mutex_lock(&(mutex))
#define pipe_mutex_unlock(mutex) \
(void) pthread_mutex_unlock(&(mutex))
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#define pipe_static_condvar(mutex) \
static pipe_condvar mutex = PTHREAD_COND_INITIALIZER
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#define pipe_condvar_init(cond) \
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pthread_cond_init(&(cond), NULL)
#define pipe_condvar_destroy(cond) \
pthread_cond_destroy(&(cond))
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#define pipe_condvar_wait(cond, mutex) \
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pthread_cond_wait(&(cond), &(mutex))
#define pipe_condvar_signal(cond) \
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pthread_cond_signal(&(cond))
#define pipe_condvar_broadcast(cond) \
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pthread_cond_broadcast(&(cond))
typedef pthread_barrier_t pipe_barrier;
static INLINE void pipe_barrier_init(pipe_barrier *barrier, unsigned count)
{
pthread_barrier_init(barrier, NULL, count);
}
static INLINE void pipe_barrier_destroy(pipe_barrier *barrier)
{
pthread_barrier_destroy(barrier);
}
static INLINE void pipe_barrier_wait(pipe_barrier *barrier)
{
pthread_barrier_wait(barrier);
}
#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
#include <windows.h>
typedef HANDLE pipe_thread;
#define PIPE_THREAD_ROUTINE( name, param ) \
void * WINAPI name( void *param )
static INLINE pipe_thread pipe_thread_create( void *(WINAPI * routine)( void *), void *param )
{
DWORD id;
return CreateThread( NULL, 0, (LPTHREAD_START_ROUTINE) routine, param, 0, &id );
}
static INLINE int pipe_thread_wait( pipe_thread thread )
{
if (WaitForSingleObject( thread, INFINITE ) == WAIT_OBJECT_0)
return 0;
return -1;
}
static INLINE int pipe_thread_destroy( pipe_thread thread )
{
if (CloseHandle( thread ))
return 0;
return -1;
}
typedef CRITICAL_SECTION pipe_mutex;
#define pipe_static_mutex(mutex) \
/*static*/ pipe_mutex mutex = {0,0,0,0,0,0}
#define pipe_mutex_init(mutex) \
InitializeCriticalSection(&mutex)
#define pipe_mutex_destroy(mutex) \
DeleteCriticalSection(&mutex)
#define pipe_mutex_lock(mutex) \
EnterCriticalSection(&mutex)
#define pipe_mutex_unlock(mutex) \
LeaveCriticalSection(&mutex)
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/* XXX: dummy definitions, make it compile */
typedef unsigned pipe_condvar;
#define pipe_condvar_init(condvar) \
(void) condvar
#define pipe_condvar_broadcast(condvar) \
(void) condvar
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typedef unsigned pipe_barrier;
static INLINE void pipe_barrier_init(pipe_barrier *barrier, unsigned count)
{
/* XXX we could implement barriers with a mutex and condition var */
assert(0);
}
static INLINE void pipe_barrier_destroy(pipe_barrier *barrier)
{
assert(0);
}
static INLINE void pipe_barrier_wait(pipe_barrier *barrier)
{
assert(0);
}
#else
/** Dummy definitions */
typedef unsigned pipe_thread;
typedef unsigned pipe_mutex;
typedef unsigned pipe_condvar;
typedef unsigned pipe_barrier;
#define pipe_static_mutex(mutex) \
static pipe_mutex mutex = 0
#define pipe_mutex_init(mutex) \
(void) mutex
#define pipe_mutex_destroy(mutex) \
(void) mutex
#define pipe_mutex_lock(mutex) \
(void) mutex
#define pipe_mutex_unlock(mutex) \
(void) mutex
#define pipe_static_condvar(condvar) \
static unsigned condvar = 0
#define pipe_condvar_init(condvar) \
(void) condvar
#define pipe_condvar_destroy(condvar) \
(void) condvar
#define pipe_condvar_wait(condvar, mutex) \
(void) condvar
#define pipe_condvar_signal(condvar) \
(void) condvar
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#define pipe_condvar_broadcast(condvar) \
(void) condvar
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static INLINE void pipe_barrier_init(pipe_barrier *barrier, unsigned count)
{
/* XXX we could implement barriers with a mutex and condition var */
assert(0);
}
static INLINE void pipe_barrier_destroy(pipe_barrier *barrier)
{
assert(0);
}
static INLINE void pipe_barrier_wait(pipe_barrier *barrier)
{
assert(0);
}
#endif /* PIPE_OS_? */
/*
* Semaphores
*/
typedef struct
{
pipe_mutex mutex;
pipe_condvar cond;
int counter;
} pipe_semaphore;
static INLINE void
pipe_semaphore_init(pipe_semaphore *sema, int init_val)
{
pipe_mutex_init(sema->mutex);
pipe_condvar_init(sema->cond);
sema->counter = init_val;
}
static INLINE void
pipe_semaphore_destroy(pipe_semaphore *sema)
{
pipe_mutex_destroy(sema->mutex);
pipe_condvar_destroy(sema->cond);
}
/** Signal/increment semaphore counter */
static INLINE void
pipe_semaphore_signal(pipe_semaphore *sema)
{
pipe_mutex_lock(sema->mutex);
sema->counter++;
pipe_condvar_signal(sema->cond);
pipe_mutex_unlock(sema->mutex);
}
/** Wait for semaphore counter to be greater than zero */
static INLINE void
pipe_semaphore_wait(pipe_semaphore *sema)
{
pipe_mutex_lock(sema->mutex);
while (sema->counter <= 0) {
pipe_condvar_wait(sema->cond, sema->mutex);
}
sema->counter--;
pipe_mutex_unlock(sema->mutex);
}
/*
* Thread-specific data.
*/
typedef struct {
#if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS) || defined(PIPE_OS_APPLE) || defined(PIPE_OS_HAIKU)
pthread_key_t key;
#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
DWORD key;
#endif
int initMagic;
} pipe_tsd;
#define PIPE_TSD_INIT_MAGIC 0xff8adc98
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static INLINE void
pipe_tsd_init(pipe_tsd *tsd)
{
#if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS) || defined(PIPE_OS_APPLE) || defined(PIPE_OS_HAIKU)
if (pthread_key_create(&tsd->key, NULL/*free*/) != 0) {
perror("pthread_key_create(): failed to allocate key for thread specific data");
exit(-1);
}
#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
assert(0);
#endif
tsd->initMagic = PIPE_TSD_INIT_MAGIC;
}
static INLINE void *
pipe_tsd_get(pipe_tsd *tsd)
{
if (tsd->initMagic != (int) PIPE_TSD_INIT_MAGIC) {
pipe_tsd_init(tsd);
}
#if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS) || defined(PIPE_OS_APPLE) || defined(PIPE_OS_HAIKU)
return pthread_getspecific(tsd->key);
#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
assert(0);
return NULL;
#else
assert(0);
return NULL;
#endif
}
static INLINE void
pipe_tsd_set(pipe_tsd *tsd, void *value)
{
if (tsd->initMagic != (int) PIPE_TSD_INIT_MAGIC) {
pipe_tsd_init(tsd);
}
#if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS) || defined(PIPE_OS_APPLE) || defined(PIPE_OS_HAIKU)
if (pthread_setspecific(tsd->key, value) != 0) {
perror("pthread_set_specific() failed");
exit(-1);
}
#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
assert(0);
#else
assert(0);
#endif
}
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#endif /* _P_THREAD2_H_ */