src/gallium/include/pipe/p_thread.h

   1 /**************************************************************************
   2  *
   3  * Copyright 1999-2006 Brian Paul
   4  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  **************************************************************************/
  25
  26
  27 /**
  28  * Thread, mutex, condition var and thread-specific data functions.
  29  */
  30
  31
  32 #ifndef _P_THREAD2_H_
  33 #define _P_THREAD2_H_
  34
  35
  36 #include "pipe/p_compiler.h"
  37
  38
  39 #if defined(PIPE_OS_LINUX)
  40
  41 #include <pthread.h> /* POSIX threads headers */
  42 #include <stdio.h> /* for perror() */
  43
  44
  45 typedef pthread_t pipe_thread;
  46 typedef pthread_mutex_t pipe_mutex;
  47 typedef pthread_cond_t pipe_condvar;
  48
  49 #define pipe_static_mutex(mutex) \
  50    static pipe_mutex mutex = PTHREAD_MUTEX_INITIALIZER
  51
  52 #define pipe_mutex_init(mutex) \
  53    pthread_mutex_init(&(mutex), NULL)
  54
  55 #define pipe_mutex_destroy(mutex) \
  56    pthread_mutex_destroy(&(mutex))
  57
  58 #define pipe_mutex_lock(mutex) \
  59    (void) pthread_mutex_lock(&(mutex))
  60
  61 #define pipe_mutex_unlock(mutex) \
  62    (void) pthread_mutex_unlock(&(mutex))
  63
  64 #define pipe_static_condvar(mutex) \
  65    static pipe_condvar mutex = PTHREAD_COND_INITIALIZER
  66
  67 #define pipe_condvar_init(cond) \
  68    pthread_cond_init(&(cond), NULL)
  69
  70 #define pipe_condvar_destroy(cond) \
  71    pthread_cond_destroy(&(cond))
  72
  73 #define pipe_condvar_wait(cond, mutex) \
  74   pthread_cond_wait(&(cond), &(mutex))
  75
  76 #define pipe_condvar_signal(cond) \
  77   pthread_cond_signal(&(cond))
  78
  79 #define pipe_condvar_broadcast(cond) \
  80   pthread_cond_broadcast(&(cond))
  81
  82
  83 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
  84
  85 #include <windows.h>
  86
  87 typedef HANDLE pipe_thread;
  88 typedef CRITICAL_SECTION pipe_mutex;
  89
  90 #define pipe_static_mutex(name) \
  91    /*static*/ pipe_mutex name = {0,0,0,0,0,0}
  92
  93 #define pipe_mutex_init(name) \
  94    InitializeCriticalSection(&name)
  95
  96 #define pipe_mutex_destroy(name) \
  97    DeleteCriticalSection(&name)
  98
  99 #define pipe_mutex_lock(name) \
 100    EnterCriticalSection(&name)
 101
 102 #define pipe_mutex_unlock(name) \
 103    LeaveCriticalSection(&name)
 104
 105 /* XXX: dummy definitions, make it compile */
 106
 107 typedef unsigned pipe_condvar;
 108
 109 #define pipe_condvar_init(condvar) \
 110    (void) condvar
 111
 112 #define pipe_condvar_broadcast(condvar) \
 113    (void) condvar
 114
 115 #else
 116
 117 /** Dummy definitions */
 118
 119 typedef unsigned pipe_thread;
 120 typedef unsigned pipe_mutex;
 121 typedef unsigned pipe_condvar;
 122
 123 #define pipe_static_mutex(mutex) \
 124    static pipe_mutex mutex = 0
 125
 126 #define pipe_mutex_init(mutex) \
 127    (void) mutex
 128
 129 #define pipe_mutex_destroy(mutex) \
 130    (void) mutex
 131
 132 #define pipe_mutex_lock(mutex) \
 133    (void) mutex
 134
 135 #define pipe_mutex_unlock(mutex) \
 136    (void) mutex
 137
 138 #define pipe_static_condvar(condvar) \
 139    static unsigned condvar = 0
 140
 141 #define pipe_condvar_init(condvar) \
 142    (void) condvar
 143
 144 #define pipe_condvar_destroy(condvar) \
 145    (void) condvar
 146
 147 #define pipe_condvar_wait(condvar, mutex) \
 148    (void) condvar
 149
 150 #define pipe_condvar_signal(condvar) \
 151    (void) condvar
 152
 153 #define pipe_condvar_broadcast(condvar) \
 154    (void) condvar
 155
 156
 157 #endif  /* PIPE_OS_? */
 158
 159
 160
 161 /*
 162  * Thread-specific data.
 163  */
 164
 165 typedef struct {
 166 #if defined(PIPE_OS_LINUX)
 167    pthread_key_t key;
 168 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
 169    DWORD key;
 170 #endif
 171    int initMagic;
 172 } pipe_tsd;
 173
 174
 175 #define PIPE_TSD_INIT_MAGIC 0xff8adc98
 176
 177
 178 static INLINE void
 179 pipe_tsd_init(pipe_tsd *tsd)
 180 {
 181 #if defined(PIPE_OS_LINUX)
 182    if (pthread_key_create(&tsd->key, NULL/*free*/) != 0) {
 183       perror("pthread_key_create(): failed to allocate key for thread specific data");
 184       exit(-1);
 185    }
 186 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
 187    assert(0);
 188 #endif
 189    tsd->initMagic = PIPE_TSD_INIT_MAGIC;
 190 }
 191
 192 static INLINE void *
 193 pipe_tsd_get(pipe_tsd *tsd)
 194 {
 195    if (tsd->initMagic != (int) PIPE_TSD_INIT_MAGIC) {
 196       pipe_tsd_init(tsd);
 197    }
 198 #if defined(PIPE_OS_LINUX)
 199    return pthread_getspecific(tsd->key);
 200 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
 201    assert(0);
 202    return NULL;
 203 #else
 204    assert(0);
 205    return NULL;
 206 #endif
 207 }
 208
 209 static INLINE void
 210 pipe_tsd_set(pipe_tsd *tsd, void *value)
 211 {
 212    if (tsd->initMagic != (int) PIPE_TSD_INIT_MAGIC) {
 213       pipe_tsd_init(tsd);
 214    }
 215 #if defined(PIPE_OS_LINUX)
 216    if (pthread_setspecific(tsd->key, value) != 0) {
 217       perror("pthread_set_specific() failed");
 218       exit(-1);
 219    }
 220 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
 221    assert(0);
 222 #else
 223    assert(0);
 224 #endif
 225 }
 226
 227
 228
 229 #endif /* _P_THREAD2_H_ */