vp8/common/threading.h

   1 /*
   2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
   3  *
   4  *  Use of this source code is governed by a BSD-style license
   5  *  that can be found in the LICENSE file in the root of the source
   6  *  tree. An additional intellectual property rights grant can be found
   7  *  in the file PATENTS.  All contributing project authors may
   8  *  be found in the AUTHORS file in the root of the source tree.
   9  */
  10
  11
  12 #ifndef _PTHREAD_EMULATION
  13 #define _PTHREAD_EMULATION
  14
  15 #define VPXINFINITE 10000       /* 10second. */
  16
  17 /* Thread management macros */
  18 #ifdef _WIN32
  19 /* Win32 */
  20 #define _WIN32_WINNT 0x500 /* WINBASE.H - Enable signal_object_and_wait */
  21 #include <process.h>
  22 #include <windows.h>
  23 #define THREAD_FUNCTION DWORD WINAPI
  24 #define THREAD_FUNCTION_RETURN DWORD
  25 #define THREAD_SPECIFIC_INDEX DWORD
  26 #define pthread_t HANDLE
  27 #define pthread_attr_t DWORD
  28 #define pthread_create(thhandle,attr,thfunc,tharg) (int)((*thhandle=(HANDLE)_beginthreadex(NULL,0,(unsigned int (__stdcall *)(void *))thfunc,tharg,0,NULL))==NULL)
  29 #define pthread_join(thread, result) ((WaitForSingleObject((thread),VPXINFINITE)!=WAIT_OBJECT_0) || !CloseHandle(thread))
  30 #define pthread_detach(thread) if(thread!=NULL)CloseHandle(thread)
  31 #define thread_sleep(nms) Sleep(nms)
  32 #define pthread_cancel(thread) terminate_thread(thread,0)
  33 #define ts_key_create(ts_key, destructor) {ts_key = TlsAlloc();};
  34 #define pthread_getspecific(ts_key) TlsGetValue(ts_key)
  35 #define pthread_setspecific(ts_key, value) TlsSetValue(ts_key, (void *)value)
  36 #define pthread_self() GetCurrentThreadId()
  37 #else
  38 #ifdef __APPLE__
  39 #include <mach/semaphore.h>
  40 #include <mach/task.h>
  41 #include <time.h>
  42 #include <unistd.h>
  43
  44 #else
  45 #include <semaphore.h>
  46 #endif
  47
  48 #include <pthread.h>
  49 /* pthreads */
  50 /* Nearly everything is already defined */
  51 #define THREAD_FUNCTION void *
  52 #define THREAD_FUNCTION_RETURN void *
  53 #define THREAD_SPECIFIC_INDEX pthread_key_t
  54 #define ts_key_create(ts_key, destructor) pthread_key_create (&(ts_key), destructor);
  55 #endif
  56
  57 /* Syncrhronization macros: Win32 and Pthreads */
  58 #ifdef _WIN32
  59 #define sem_t HANDLE
  60 #define pause(voidpara) __asm PAUSE
  61 #define sem_init(sem, sem_attr1, sem_init_value) (int)((*sem = CreateEvent(NULL,FALSE,FALSE,NULL))==NULL)
  62 #define sem_wait(sem) (int)(WAIT_OBJECT_0 != WaitForSingleObject(*sem,VPXINFINITE))
  63 #define sem_post(sem) SetEvent(*sem)
  64 #define sem_destroy(sem) if(*sem)((int)(CloseHandle(*sem))==TRUE)
  65 #define thread_sleep(nms) Sleep(nms)
  66
  67 #else
  68
  69 #ifdef __APPLE__
  70 #define sem_t semaphore_t
  71 #define sem_init(X,Y,Z) semaphore_create(mach_task_self(), X, SYNC_POLICY_FIFO, Z)
  72 #define sem_wait(sem) (semaphore_wait(*sem) )
  73 #define sem_post(sem) semaphore_signal(*sem)
  74 #define sem_destroy(sem) semaphore_destroy(mach_task_self(),*sem)
  75 #define thread_sleep(nms) /* { struct timespec ts;ts.tv_sec=0; ts.tv_nsec = 1000*nms;nanosleep(&ts, NULL);} */
  76 #else
  77 #include <unistd.h>
  78 #include <sched.h>
  79 #define thread_sleep(nms) sched_yield();/* {struct timespec ts;ts.tv_sec=0; ts.tv_nsec = 1000*nms;nanosleep(&ts, NULL);} */
  80 #endif
  81 /* Not Windows. Assume pthreads */
  82
  83 #endif
  84
  85 #if ARCH_X86 || ARCH_X86_64
  86 #include "vpx_ports/x86.h"
  87 #else
  88 #define x86_pause_hint()
  89 #endif
  90
  91 #endif