511 lines
12 KiB
C
511 lines
12 KiB
C
/**************************************************************************
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*
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* Copyright 1999-2006 Brian Paul
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* Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/**
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* @file
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*
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* Thread, mutex, condition variable, barrier, semaphore and
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* thread-specific data functions.
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*/
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#ifndef OS_THREAD_H_
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#define OS_THREAD_H_
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#include "pipe/p_compiler.h"
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#include "util/u_debug.h" /* for assert */
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#if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS) || defined(PIPE_OS_APPLE) || defined(PIPE_OS_HAIKU) || defined(PIPE_OS_CYGWIN)
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#include <pthread.h> /* POSIX threads headers */
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#include <stdio.h> /* for perror() */
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#include <signal.h>
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/* pipe_thread
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*/
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typedef pthread_t pipe_thread;
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#define PIPE_THREAD_ROUTINE( name, param ) \
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void *name( void *param )
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static INLINE pipe_thread pipe_thread_create( void *(* routine)( void *), void *param )
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{
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pipe_thread thread;
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sigset_t saved_set, new_set;
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int ret;
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sigfillset(&new_set);
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pthread_sigmask(SIG_SETMASK, &new_set, &saved_set);
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ret = pthread_create( &thread, NULL, routine, param );
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pthread_sigmask(SIG_SETMASK, &saved_set, NULL);
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if (ret)
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return 0;
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return thread;
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}
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static INLINE int pipe_thread_wait( pipe_thread thread )
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{
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return pthread_join( thread, NULL );
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}
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static INLINE int pipe_thread_destroy( pipe_thread thread )
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{
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return pthread_detach( thread );
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}
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/* pipe_mutex
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*/
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typedef pthread_mutex_t pipe_mutex;
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#define pipe_static_mutex(mutex) \
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static pipe_mutex mutex = PTHREAD_MUTEX_INITIALIZER
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#define pipe_mutex_init(mutex) \
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(void) pthread_mutex_init(&(mutex), NULL)
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#define pipe_mutex_destroy(mutex) \
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pthread_mutex_destroy(&(mutex))
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#define pipe_mutex_lock(mutex) \
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(void) pthread_mutex_lock(&(mutex))
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#define pipe_mutex_unlock(mutex) \
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(void) pthread_mutex_unlock(&(mutex))
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/* pipe_condvar
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*/
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typedef pthread_cond_t pipe_condvar;
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#define pipe_static_condvar(mutex) \
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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)
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#define pipe_condvar_destroy(cond) \
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pthread_cond_destroy(&(cond))
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#define pipe_condvar_wait(cond, mutex) \
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pthread_cond_wait(&(cond), &(mutex))
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#define pipe_condvar_signal(cond) \
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pthread_cond_signal(&(cond))
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#define pipe_condvar_broadcast(cond) \
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pthread_cond_broadcast(&(cond))
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#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
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#include <windows.h>
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/* pipe_thread
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*/
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typedef HANDLE pipe_thread;
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#define PIPE_THREAD_ROUTINE( name, param ) \
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void * WINAPI name( void *param )
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static INLINE pipe_thread pipe_thread_create( void *(WINAPI * routine)( void *), void *param )
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{
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DWORD id;
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return CreateThread( NULL, 0, (LPTHREAD_START_ROUTINE) routine, param, 0, &id );
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}
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static INLINE int pipe_thread_wait( pipe_thread thread )
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{
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if (WaitForSingleObject( thread, INFINITE ) == WAIT_OBJECT_0)
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return 0;
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return -1;
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}
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static INLINE int pipe_thread_destroy( pipe_thread thread )
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{
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if (CloseHandle( thread ))
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return 0;
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return -1;
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}
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/* pipe_mutex
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*/
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typedef CRITICAL_SECTION pipe_mutex;
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/* http://locklessinc.com/articles/pthreads_on_windows/ */
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#define pipe_static_mutex(mutex) \
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static pipe_mutex mutex = {(PCRITICAL_SECTION_DEBUG)-1, -1, 0, 0, 0, 0}
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#define pipe_mutex_init(mutex) \
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InitializeCriticalSection(&mutex)
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#define pipe_mutex_destroy(mutex) \
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DeleteCriticalSection(&mutex)
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#define pipe_mutex_lock(mutex) \
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EnterCriticalSection(&mutex)
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#define pipe_mutex_unlock(mutex) \
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LeaveCriticalSection(&mutex)
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/* TODO: Need a macro to declare "I don't care about WinXP compatibilty" */
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#if 0 && defined (_WIN32_WINNT) && (_WIN32_WINNT >= 0x0600)
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/* CONDITION_VARIABLE is only available on newer versions of Windows
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* (Server 2008/Vista or later).
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* http://msdn.microsoft.com/en-us/library/ms682052(VS.85).aspx
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*
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* pipe_condvar
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*/
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typedef CONDITION_VARIABLE pipe_condvar;
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#define pipe_static_condvar(cond) \
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/*static*/ pipe_condvar cond = CONDITION_VARIABLE_INIT
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#define pipe_condvar_init(cond) \
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InitializeConditionVariable(&(cond))
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#define pipe_condvar_destroy(cond) \
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(void) cond /* nothing to do */
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#define pipe_condvar_wait(cond, mutex) \
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SleepConditionVariableCS(&(cond), &(mutex), INFINITE)
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#define pipe_condvar_signal(cond) \
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WakeConditionVariable(&(cond))
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#define pipe_condvar_broadcast(cond) \
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WakeAllConditionVariable(&(cond))
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#else /* need compatibility with pre-Vista Win32 */
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/* pipe_condvar (XXX FIX THIS)
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* See http://www.cs.wustl.edu/~schmidt/win32-cv-1.html
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* for potential pitfalls in implementation.
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*/
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typedef DWORD pipe_condvar;
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#define pipe_static_condvar(cond) \
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/*static*/ pipe_condvar cond = 1
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#define pipe_condvar_init(cond) \
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(void) (cond = 1)
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#define pipe_condvar_destroy(cond) \
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(void) cond
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/* Poor man's pthread_cond_wait():
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Just release the mutex and sleep for one millisecond.
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The caller's while() loop does all the work. */
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#define pipe_condvar_wait(cond, mutex) \
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do { pipe_mutex_unlock(mutex); \
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Sleep(cond); \
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pipe_mutex_lock(mutex); \
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} while (0)
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#define pipe_condvar_signal(cond) \
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(void) cond
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#define pipe_condvar_broadcast(cond) \
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(void) cond
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#endif /* pre-Vista win32 */
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#else
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#include "os/os_time.h"
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/** Dummy definitions */
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typedef unsigned pipe_thread;
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#define PIPE_THREAD_ROUTINE( name, param ) \
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void * name( void *param )
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static INLINE pipe_thread pipe_thread_create( void *(* routine)( void *), void *param )
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{
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return 0;
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}
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static INLINE int pipe_thread_wait( pipe_thread thread )
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{
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return -1;
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}
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static INLINE int pipe_thread_destroy( pipe_thread thread )
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{
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return -1;
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}
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typedef unsigned pipe_mutex;
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#define pipe_static_mutex(mutex) \
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static pipe_mutex mutex = 0
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#define pipe_mutex_init(mutex) \
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(void) mutex
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#define pipe_mutex_destroy(mutex) \
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(void) mutex
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#define pipe_mutex_lock(mutex) \
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(void) mutex
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#define pipe_mutex_unlock(mutex) \
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(void) mutex
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typedef int64_t pipe_condvar;
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#define pipe_static_condvar(condvar) \
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static pipe_condvar condvar = 1000
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#define pipe_condvar_init(condvar) \
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(void) (condvar = 1000)
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#define pipe_condvar_destroy(condvar) \
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(void) condvar
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/* Poor man's pthread_cond_wait():
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Just release the mutex and sleep for one millisecond.
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The caller's while() loop does all the work. */
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#define pipe_condvar_wait(condvar, mutex) \
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do { pipe_mutex_unlock(mutex); \
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os_time_sleep(condvar); \
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pipe_mutex_lock(mutex); \
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} while (0)
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#define pipe_condvar_signal(condvar) \
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(void) condvar
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#define pipe_condvar_broadcast(condvar) \
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(void) condvar
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#endif /* PIPE_OS_? */
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/*
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* pipe_barrier
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*/
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#if (defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS)) && !defined(PIPE_OS_ANDROID)
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typedef pthread_barrier_t pipe_barrier;
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static INLINE void pipe_barrier_init(pipe_barrier *barrier, unsigned count)
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{
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pthread_barrier_init(barrier, NULL, count);
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}
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static INLINE void pipe_barrier_destroy(pipe_barrier *barrier)
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{
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pthread_barrier_destroy(barrier);
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}
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static INLINE void pipe_barrier_wait(pipe_barrier *barrier)
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{
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pthread_barrier_wait(barrier);
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}
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#else /* If the OS doesn't have its own, implement barriers using a mutex and a condvar */
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typedef struct {
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unsigned count;
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unsigned waiters;
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uint64_t sequence;
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pipe_mutex mutex;
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pipe_condvar condvar;
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} pipe_barrier;
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static INLINE void pipe_barrier_init(pipe_barrier *barrier, unsigned count)
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{
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barrier->count = count;
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barrier->waiters = 0;
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barrier->sequence = 0;
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pipe_mutex_init(barrier->mutex);
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pipe_condvar_init(barrier->condvar);
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}
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static INLINE void pipe_barrier_destroy(pipe_barrier *barrier)
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{
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assert(barrier->waiters == 0);
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pipe_mutex_destroy(barrier->mutex);
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pipe_condvar_destroy(barrier->condvar);
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}
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static INLINE void pipe_barrier_wait(pipe_barrier *barrier)
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{
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pipe_mutex_lock(barrier->mutex);
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assert(barrier->waiters < barrier->count);
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barrier->waiters++;
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if (barrier->waiters < barrier->count) {
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uint64_t sequence = barrier->sequence;
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do {
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pipe_condvar_wait(barrier->condvar, barrier->mutex);
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} while (sequence == barrier->sequence);
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} else {
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barrier->waiters = 0;
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barrier->sequence++;
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pipe_condvar_broadcast(barrier->condvar);
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}
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pipe_mutex_unlock(barrier->mutex);
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}
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#endif
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/*
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* Semaphores
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*/
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typedef struct
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{
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pipe_mutex mutex;
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pipe_condvar cond;
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int counter;
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} pipe_semaphore;
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static INLINE void
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pipe_semaphore_init(pipe_semaphore *sema, int init_val)
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{
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pipe_mutex_init(sema->mutex);
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pipe_condvar_init(sema->cond);
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sema->counter = init_val;
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}
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static INLINE void
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pipe_semaphore_destroy(pipe_semaphore *sema)
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{
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pipe_mutex_destroy(sema->mutex);
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pipe_condvar_destroy(sema->cond);
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}
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/** Signal/increment semaphore counter */
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static INLINE void
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pipe_semaphore_signal(pipe_semaphore *sema)
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{
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pipe_mutex_lock(sema->mutex);
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sema->counter++;
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pipe_condvar_signal(sema->cond);
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pipe_mutex_unlock(sema->mutex);
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}
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/** Wait for semaphore counter to be greater than zero */
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static INLINE void
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pipe_semaphore_wait(pipe_semaphore *sema)
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{
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pipe_mutex_lock(sema->mutex);
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while (sema->counter <= 0) {
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pipe_condvar_wait(sema->cond, sema->mutex);
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}
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sema->counter--;
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pipe_mutex_unlock(sema->mutex);
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}
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/*
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* Thread-specific data.
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*/
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typedef struct {
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#if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS) || defined(PIPE_OS_APPLE) || defined(PIPE_OS_HAIKU) || defined(PIPE_OS_CYGWIN)
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pthread_key_t key;
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#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
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DWORD key;
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#endif
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int initMagic;
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} pipe_tsd;
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#define PIPE_TSD_INIT_MAGIC 0xff8adc98
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static INLINE void
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pipe_tsd_init(pipe_tsd *tsd)
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{
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#if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS) || defined(PIPE_OS_APPLE) || defined(PIPE_OS_HAIKU) || defined(PIPE_OS_CYGWIN)
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if (pthread_key_create(&tsd->key, NULL/*free*/) != 0) {
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perror("pthread_key_create(): failed to allocate key for thread specific data");
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exit(-1);
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}
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#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
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assert(0);
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#endif
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tsd->initMagic = PIPE_TSD_INIT_MAGIC;
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}
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static INLINE void *
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pipe_tsd_get(pipe_tsd *tsd)
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{
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if (tsd->initMagic != (int) PIPE_TSD_INIT_MAGIC) {
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pipe_tsd_init(tsd);
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}
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#if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS) || defined(PIPE_OS_APPLE) || defined(PIPE_OS_HAIKU) || defined(PIPE_OS_CYGWIN)
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return pthread_getspecific(tsd->key);
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#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
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assert(0);
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return NULL;
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#else
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assert(0);
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return NULL;
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#endif
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}
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static INLINE void
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pipe_tsd_set(pipe_tsd *tsd, void *value)
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{
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if (tsd->initMagic != (int) PIPE_TSD_INIT_MAGIC) {
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pipe_tsd_init(tsd);
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}
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#if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS) || defined(PIPE_OS_APPLE) || defined(PIPE_OS_HAIKU) || defined(PIPE_OS_CYGWIN)
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if (pthread_setspecific(tsd->key, value) != 0) {
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perror("pthread_set_specific() failed");
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exit(-1);
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}
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#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
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assert(0);
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#else
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assert(0);
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#endif
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}
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#endif /* OS_THREAD_H_ */
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