src/gallium/auxiliary/os/os_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  * @file
  29  *
  30  * Thread, mutex, condition variable, barrier, semaphore and
  31  * thread-specific data functions.
  32  */
  33
  34
  35 #ifndef OS_THREAD_H_
  36 #define OS_THREAD_H_
  37
  38
  39 #include "pipe/p_compiler.h"
  40 #include "util/u_debug.h" /* for assert */
  41
  42
  43 #if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS) || defined(PIPE_OS_APPLE) || defined(PIPE_OS_HAIKU) || defined(PIPE_OS_EMBEDDED)
  44
  45 #include <pthread.h> /* POSIX threads headers */
  46 #include <stdio.h> /* for perror() */
  47
  48 #define PIPE_THREAD_HAVE_CONDVAR
  49
  50 /* pipe_thread
  51  */
  52 typedef pthread_t pipe_thread;
  53
  54 #define PIPE_THREAD_ROUTINE( name, param ) \
  55    void *name( void *param )
  56
  57 static INLINE pipe_thread pipe_thread_create( void *(* routine)( void *), void *param )
  58 {
  59    pipe_thread thread;
  60    if (pthread_create( &thread, NULL, routine, param ))
  61       return 0;
  62    return thread;
  63 }
  64
  65 static INLINE int pipe_thread_wait( pipe_thread thread )
  66 {
  67    return pthread_join( thread, NULL );
  68 }
  69
  70 static INLINE int pipe_thread_destroy( pipe_thread thread )
  71 {
  72    return pthread_detach( thread );
  73 }
  74
  75
  76 /* pipe_mutex
  77  */
  78 typedef pthread_mutex_t pipe_mutex;
  79
  80 #define pipe_static_mutex(mutex) \
  81    static pipe_mutex mutex = PTHREAD_MUTEX_INITIALIZER
  82
  83 #define pipe_mutex_init(mutex) \
  84    (void) pthread_mutex_init(&(mutex), NULL)
  85
  86 #define pipe_mutex_destroy(mutex) \
  87    pthread_mutex_destroy(&(mutex))
  88
  89 #define pipe_mutex_lock(mutex) \
  90    (void) pthread_mutex_lock(&(mutex))
  91
  92 #define pipe_mutex_unlock(mutex) \
  93    (void) pthread_mutex_unlock(&(mutex))
  94
  95
  96 /* pipe_condvar
  97  */
  98 typedef pthread_cond_t pipe_condvar;
  99
 100 #define pipe_static_condvar(mutex) \
 101    static pipe_condvar mutex = PTHREAD_COND_INITIALIZER
 102
 103 #define pipe_condvar_init(cond) \
 104    pthread_cond_init(&(cond), NULL)
 105
 106 #define pipe_condvar_destroy(cond) \
 107    pthread_cond_destroy(&(cond))
 108
 109 #define pipe_condvar_wait(cond, mutex) \
 110   pthread_cond_wait(&(cond), &(mutex))
 111
 112 #define pipe_condvar_signal(cond) \
 113   pthread_cond_signal(&(cond))
 114
 115 #define pipe_condvar_broadcast(cond) \
 116   pthread_cond_broadcast(&(cond))
 117
 118
 119
 120 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
 121
 122 #include <windows.h>
 123
 124 /* pipe_thread
 125  */
 126 typedef HANDLE pipe_thread;
 127
 128 #define PIPE_THREAD_ROUTINE( name, param ) \
 129    void * WINAPI name( void *param )
 130
 131 static INLINE pipe_thread pipe_thread_create( void *(WINAPI * routine)( void *), void *param )
 132 {
 133    DWORD id;
 134    return CreateThread( NULL, 0, (LPTHREAD_START_ROUTINE) routine, param, 0, &id );
 135 }
 136
 137 static INLINE int pipe_thread_wait( pipe_thread thread )
 138 {
 139    if (WaitForSingleObject( thread, INFINITE ) == WAIT_OBJECT_0)
 140       return 0;
 141    return -1;
 142 }
 143
 144 static INLINE int pipe_thread_destroy( pipe_thread thread )
 145 {
 146    if (CloseHandle( thread ))
 147       return 0;
 148    return -1;
 149 }
 150
 151
 152 /* pipe_mutex
 153  */
 154 typedef CRITICAL_SECTION pipe_mutex;
 155
 156 #define pipe_static_mutex(mutex) \
 157    /*static*/ pipe_mutex mutex = {0,0,0,0,0,0}
 158
 159 #define pipe_mutex_init(mutex) \
 160    InitializeCriticalSection(&mutex)
 161
 162 #define pipe_mutex_destroy(mutex) \
 163    DeleteCriticalSection(&mutex)
 164
 165 #define pipe_mutex_lock(mutex) \
 166    EnterCriticalSection(&mutex)
 167
 168 #define pipe_mutex_unlock(mutex) \
 169    LeaveCriticalSection(&mutex)
 170
 171
 172 /* pipe_condvar (XXX FIX THIS)
 173  */
 174 typedef unsigned pipe_condvar;
 175
 176 #define pipe_condvar_init(cond) \
 177    (void) cond
 178
 179 #define pipe_condvar_destroy(cond) \
 180    (void) cond
 181
 182 #define pipe_condvar_wait(cond, mutex) \
 183    (void) cond; (void) mutex
 184
 185 #define pipe_condvar_signal(cond) \
 186    (void) cond
 187
 188 #define pipe_condvar_broadcast(cond) \
 189    (void) cond
 190
 191
 192 #else
 193
 194 /** Dummy definitions */
 195
 196 typedef unsigned pipe_thread;
 197
 198 #define PIPE_THREAD_ROUTINE( name, param ) \
 199    void * name( void *param )
 200
 201 static INLINE pipe_thread pipe_thread_create( void *(* routine)( void *), void *param )
 202 {
 203    return 0;
 204 }
 205
 206 static INLINE int pipe_thread_wait( pipe_thread thread )
 207 {
 208    return -1;
 209 }
 210
 211 static INLINE int pipe_thread_destroy( pipe_thread thread )
 212 {
 213    return -1;
 214 }
 215
 216 typedef unsigned pipe_mutex;
 217 typedef unsigned pipe_condvar;
 218
 219 #define pipe_static_mutex(mutex) \
 220    static pipe_mutex mutex = 0
 221
 222 #define pipe_mutex_init(mutex) \
 223    (void) mutex
 224
 225 #define pipe_mutex_destroy(mutex) \
 226    (void) mutex
 227
 228 #define pipe_mutex_lock(mutex) \
 229    (void) mutex
 230
 231 #define pipe_mutex_unlock(mutex) \
 232    (void) mutex
 233
 234 #define pipe_static_condvar(condvar) \
 235    static unsigned condvar = 0
 236
 237 #define pipe_condvar_init(condvar) \
 238    (void) condvar
 239
 240 #define pipe_condvar_destroy(condvar) \
 241    (void) condvar
 242
 243 #define pipe_condvar_wait(condvar, mutex) \
 244    (void) condvar
 245
 246 #define pipe_condvar_signal(condvar) \
 247    (void) condvar
 248
 249 #define pipe_condvar_broadcast(condvar) \
 250    (void) condvar
 251
 252
 253 #endif  /* PIPE_OS_? */
 254
 255
 256 /*
 257  * pipe_barrier
 258  */
 259
 260 #if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS) || defined(PIPE_OS_HAIKU) || defined(PIPE_OS_EMBEDDED)
 261
 262 typedef pthread_barrier_t pipe_barrier;
 263
 264 static INLINE void pipe_barrier_init(pipe_barrier *barrier, unsigned count)
 265 {
 266    pthread_barrier_init(barrier, NULL, count);
 267 }
 268
 269 static INLINE void pipe_barrier_destroy(pipe_barrier *barrier)
 270 {
 271    pthread_barrier_destroy(barrier);
 272 }
 273
 274 static INLINE void pipe_barrier_wait(pipe_barrier *barrier)
 275 {
 276    pthread_barrier_wait(barrier);
 277 }
 278
 279
 280 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
 281
 282 /* XXX FIX THIS */
 283 typedef unsigned pipe_barrier;
 284
 285 static INLINE void pipe_barrier_init(pipe_barrier *barrier, unsigned count)
 286 {
 287    /* XXX we could implement barriers with a mutex and condition var */
 288 }
 289
 290 static INLINE void pipe_barrier_destroy(pipe_barrier *barrier)
 291 {
 292 }
 293
 294 static INLINE void pipe_barrier_wait(pipe_barrier *barrier)
 295 {
 296    assert(0);
 297 }
 298
 299
 300 #else
 301
 302 typedef struct {
 303    unsigned count;
 304    unsigned waiters;
 305    pipe_mutex mutex;
 306    pipe_condvar condvar;
 307 } pipe_barrier;
 308
 309 static INLINE void pipe_barrier_init(pipe_barrier *barrier, unsigned count)
 310 {
 311    barrier->count = count;
 312    barrier->waiters = 0;
 313    pipe_mutex_init(barrier->mutex);
 314    pipe_condvar_init(barrier->condvar);
 315 }
 316
 317 static INLINE void pipe_barrier_destroy(pipe_barrier *barrier)
 318 {
 319    assert(barrier->waiters == 0);
 320    pipe_mutex_destroy(barrier->mutex);
 321    pipe_condvar_destroy(barrier->condvar);
 322 }
 323
 324 static INLINE void pipe_barrier_wait(pipe_barrier *barrier)
 325 {
 326    pipe_mutex_lock(barrier->mutex);
 327
 328    assert(barrier->waiters < barrier->count);
 329    barrier->waiters++;
 330
 331    if (barrier->waiters < barrier->count) {
 332       pipe_condvar_wait(barrier->condvar, barrier->mutex);
 333    } else {
 334       barrier->waiters = 0;
 335       pipe_condvar_broadcast(barrier->condvar);
 336    }
 337
 338    pipe_mutex_unlock(barrier->mutex);
 339 }
 340
 341
 342 #endif
 343
 344
 345 /*
 346  * Semaphores
 347  */
 348
 349 typedef struct
 350 {
 351    pipe_mutex mutex;
 352    pipe_condvar cond;
 353    int counter;
 354 } pipe_semaphore;
 355
 356
 357 static INLINE void
 358 pipe_semaphore_init(pipe_semaphore *sema, int init_val)
 359 {
 360    pipe_mutex_init(sema->mutex);
 361    pipe_condvar_init(sema->cond);
 362    sema->counter = init_val;
 363 }
 364
 365 static INLINE void
 366 pipe_semaphore_destroy(pipe_semaphore *sema)
 367 {
 368    pipe_mutex_destroy(sema->mutex);
 369    pipe_condvar_destroy(sema->cond);
 370 }
 371
 372 /** Signal/increment semaphore counter */
 373 static INLINE void
 374 pipe_semaphore_signal(pipe_semaphore *sema)
 375 {
 376    pipe_mutex_lock(sema->mutex);
 377    sema->counter++;
 378    pipe_condvar_signal(sema->cond);
 379    pipe_mutex_unlock(sema->mutex);
 380 }
 381
 382 /** Wait for semaphore counter to be greater than zero */
 383 static INLINE void
 384 pipe_semaphore_wait(pipe_semaphore *sema)
 385 {
 386    pipe_mutex_lock(sema->mutex);
 387    while (sema->counter <= 0) {
 388       pipe_condvar_wait(sema->cond, sema->mutex);
 389    }
 390    sema->counter--;
 391    pipe_mutex_unlock(sema->mutex);
 392 }
 393
 394
 395
 396 /*
 397  * Thread-specific data.
 398  */
 399
 400 typedef struct {
 401 #if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS) || defined(PIPE_OS_APPLE) || defined(PIPE_OS_HAIKU) || defined(PIPE_OS_EMBEDDED)
 402    pthread_key_t key;
 403 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
 404    DWORD key;
 405 #endif
 406    int initMagic;
 407 } pipe_tsd;
 408
 409
 410 #define PIPE_TSD_INIT_MAGIC 0xff8adc98
 411
 412
 413 static INLINE void
 414 pipe_tsd_init(pipe_tsd *tsd)
 415 {
 416 #if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS) || defined(PIPE_OS_APPLE) || defined(PIPE_OS_HAIKU) || defined(PIPE_OS_EMBEDDED)
 417    if (pthread_key_create(&tsd->key, NULL/*free*/) != 0) {
 418       perror("pthread_key_create(): failed to allocate key for thread specific data");
 419       exit(-1);
 420    }
 421 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
 422    assert(0);
 423 #endif
 424    tsd->initMagic = PIPE_TSD_INIT_MAGIC;
 425 }
 426
 427 static INLINE void *
 428 pipe_tsd_get(pipe_tsd *tsd)
 429 {
 430    if (tsd->initMagic != (int) PIPE_TSD_INIT_MAGIC) {
 431       pipe_tsd_init(tsd);
 432    }
 433 #if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS) || defined(PIPE_OS_APPLE) || defined(PIPE_OS_HAIKU) || defined(PIPE_OS_EMBEDDED)
 434    return pthread_getspecific(tsd->key);
 435 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
 436    assert(0);
 437    return NULL;
 438 #else
 439    assert(0);
 440    return NULL;
 441 #endif
 442 }
 443
 444 static INLINE void
 445 pipe_tsd_set(pipe_tsd *tsd, void *value)
 446 {
 447    if (tsd->initMagic != (int) PIPE_TSD_INIT_MAGIC) {
 448       pipe_tsd_init(tsd);
 449    }
 450 #if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS) || defined(PIPE_OS_APPLE) || defined(PIPE_OS_HAIKU) || defined(PIPE_OS_EMBEDDED)
 451    if (pthread_setspecific(tsd->key, value) != 0) {
 452       perror("pthread_set_specific() failed");
 453       exit(-1);
 454    }
 455 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
 456    assert(0);
 457 #else
 458    assert(0);
 459 #endif
 460 }
 461
 462
 463
 464 #endif /* OS_THREAD_H_ */