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Diffstat (limited to 'thirdparty/libvpx/vp8/common/threading.h')
| -rw-r--r-- | thirdparty/libvpx/vp8/common/threading.h | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/thirdparty/libvpx/vp8/common/threading.h b/thirdparty/libvpx/vp8/common/threading.h new file mode 100644 index 0000000000..183b49b8ff --- /dev/null +++ b/thirdparty/libvpx/vp8/common/threading.h @@ -0,0 +1,232 @@ +/* + * Copyright (c) 2010 The WebM project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + + +#ifndef VP8_COMMON_THREADING_H_ +#define VP8_COMMON_THREADING_H_ + +#include "./vpx_config.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#if CONFIG_OS_SUPPORT && CONFIG_MULTITHREAD + +/* Thread management macros */ +#if defined(_WIN32) && !HAVE_PTHREAD_H +/* Win32 */ +#include <process.h> +#include <windows.h> +#define THREAD_FUNCTION unsigned int __stdcall +#define THREAD_FUNCTION_RETURN DWORD +#define THREAD_SPECIFIC_INDEX DWORD +#define pthread_t HANDLE +#define pthread_attr_t DWORD +#define pthread_detach(thread) if(thread!=NULL)CloseHandle(thread) +#define thread_sleep(nms) Sleep(nms) +#define pthread_cancel(thread) terminate_thread(thread,0) +#define ts_key_create(ts_key, destructor) {ts_key = TlsAlloc();}; +#define pthread_getspecific(ts_key) TlsGetValue(ts_key) +#define pthread_setspecific(ts_key, value) TlsSetValue(ts_key, (void *)value) +#define pthread_self() GetCurrentThreadId() + +#elif defined(__OS2__) +/* OS/2 */ +#define INCL_DOS +#include <os2.h> + +#include <stdlib.h> +#define THREAD_FUNCTION void * +#define THREAD_FUNCTION_RETURN void * +#define THREAD_SPECIFIC_INDEX PULONG +#define pthread_t TID +#define pthread_attr_t ULONG +#define pthread_detach(thread) 0 +#define thread_sleep(nms) DosSleep(nms) +#define pthread_cancel(thread) DosKillThread(thread) +#define ts_key_create(ts_key, destructor) \ + DosAllocThreadLocalMemory(1, &(ts_key)); +#define pthread_getspecific(ts_key) ((void *)(*(ts_key))) +#define pthread_setspecific(ts_key, value) (*(ts_key)=(ULONG)(value)) +#define pthread_self() _gettid() +#else +#ifdef __APPLE__ +#include <mach/mach_init.h> +#include <mach/semaphore.h> +#include <mach/task.h> +#include <time.h> +#include <unistd.h> + +#else +#include <semaphore.h> +#endif + +#include <pthread.h> +/* pthreads */ +/* Nearly everything is already defined */ +#define THREAD_FUNCTION void * +#define THREAD_FUNCTION_RETURN void * +#define THREAD_SPECIFIC_INDEX pthread_key_t +#define ts_key_create(ts_key, destructor) pthread_key_create (&(ts_key), destructor); +#endif + +/* Synchronization macros: Win32 and Pthreads */ +#if defined(_WIN32) && !HAVE_PTHREAD_H +#define sem_t HANDLE +#define pause(voidpara) __asm PAUSE +#define sem_init(sem, sem_attr1, sem_init_value) (int)((*sem = CreateSemaphore(NULL,0,32768,NULL))==NULL) +#define sem_wait(sem) (int)(WAIT_OBJECT_0 != WaitForSingleObject(*sem,INFINITE)) +#define sem_post(sem) ReleaseSemaphore(*sem,1,NULL) +#define sem_destroy(sem) if(*sem)((int)(CloseHandle(*sem))==TRUE) +#define thread_sleep(nms) Sleep(nms) + +#elif defined(__OS2__) +typedef struct +{ + HEV event; + HMTX wait_mutex; + HMTX count_mutex; + int count; +} sem_t; + +static inline int sem_init(sem_t *sem, int pshared, unsigned int value) +{ + DosCreateEventSem(NULL, &sem->event, pshared ? DC_SEM_SHARED : 0, + value > 0 ? TRUE : FALSE); + DosCreateMutexSem(NULL, &sem->wait_mutex, 0, FALSE); + DosCreateMutexSem(NULL, &sem->count_mutex, 0, FALSE); + + sem->count = value; + + return 0; +} + +static inline int sem_wait(sem_t * sem) +{ + DosRequestMutexSem(sem->wait_mutex, -1); + + DosWaitEventSem(sem->event, -1); + + DosRequestMutexSem(sem->count_mutex, -1); + + sem->count--; + if (sem->count == 0) + { + ULONG post_count; + + DosResetEventSem(sem->event, &post_count); + } + + DosReleaseMutexSem(sem->count_mutex); + + DosReleaseMutexSem(sem->wait_mutex); + + return 0; +} + +static inline int sem_post(sem_t * sem) +{ + DosRequestMutexSem(sem->count_mutex, -1); + + if (sem->count < 32768) + { + sem->count++; + DosPostEventSem(sem->event); + } + + DosReleaseMutexSem(sem->count_mutex); + + return 0; +} + +static inline int sem_destroy(sem_t * sem) +{ + DosCloseEventSem(sem->event); + DosCloseMutexSem(sem->wait_mutex); + DosCloseMutexSem(sem->count_mutex); + + return 0; +} + +#define thread_sleep(nms) DosSleep(nms) + +#else + +#ifdef __APPLE__ +#define sem_t semaphore_t +#define sem_init(X,Y,Z) semaphore_create(mach_task_self(), X, SYNC_POLICY_FIFO, Z) +#define sem_wait(sem) (semaphore_wait(*sem) ) +#define sem_post(sem) semaphore_signal(*sem) +#define sem_destroy(sem) semaphore_destroy(mach_task_self(),*sem) +#define thread_sleep(nms) /* { struct timespec ts;ts.tv_sec=0; ts.tv_nsec = 1000*nms;nanosleep(&ts, NULL);} */ +#else +#include <unistd.h> +#include <sched.h> +#define thread_sleep(nms) sched_yield();/* {struct timespec ts;ts.tv_sec=0; ts.tv_nsec = 1000*nms;nanosleep(&ts, NULL);} */ +#endif +/* Not Windows. Assume pthreads */ + +#endif + +#if ARCH_X86 || ARCH_X86_64 +#include "vpx_ports/x86.h" +#else +#define x86_pause_hint() +#endif + +#include "vpx_util/vpx_thread.h" + +static INLINE void mutex_lock(pthread_mutex_t *const mutex) { + const int kMaxTryLocks = 4000; + int locked = 0; + int i; + + for (i = 0; i < kMaxTryLocks; ++i) { + if (!pthread_mutex_trylock(mutex)) { + locked = 1; + break; + } + } + + if (!locked) + pthread_mutex_lock(mutex); +} + +static INLINE int protected_read(pthread_mutex_t *const mutex, const int *p) { + int ret; + mutex_lock(mutex); + ret = *p; + pthread_mutex_unlock(mutex); + return ret; +} + +static INLINE void sync_read(pthread_mutex_t *const mutex, int mb_col, + const int *last_row_current_mb_col, + const int nsync) { + while (mb_col > (protected_read(mutex, last_row_current_mb_col) - nsync)) { + x86_pause_hint(); + thread_sleep(0); + } +} + +static INLINE void protected_write(pthread_mutex_t *mutex, int *p, int v) { + mutex_lock(mutex); + *p = v; + pthread_mutex_unlock(mutex); +} + +#endif /* CONFIG_OS_SUPPORT && CONFIG_MULTITHREAD */ + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif // VP8_COMMON_THREADING_H_ |