153a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org// Copyright 2013 Google Inc. All Rights Reserved. 253a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org// 353a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org// Use of this source code is governed by a BSD-style license 453a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org// that can be found in the COPYING file in the root of the source 553a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org// tree. An additional intellectual property rights grant can be found 653a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org// in the file PATENTS. All contributing project authors may 753a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org// be found in the AUTHORS file in the root of the source tree. 853a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org// ----------------------------------------------------------------------------- 953a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org// 1053a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org// Multi-threaded worker 1153a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org// 1253a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org// Original source: 1353a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org// http://git.chromium.org/webm/libwebp.git 14e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org// 100644 blob 7bd451b124ae3b81596abfbcc823e3cb129d3a38 src/utils/thread.h 1553a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org 1653a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org#ifndef VP9_DECODER_VP9_THREAD_H_ 1753a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org#define VP9_DECODER_VP9_THREAD_H_ 1853a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org 19085cab8fbb48aa8b9f7e3e6d5a2694afd0ffe2e0johannkoenig@chromium.org#include "./vpx_config.h" 2053a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org 21dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org#ifdef __cplusplus 2253a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.orgextern "C" { 2353a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org#endif 2453a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org 2553a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org#if CONFIG_MULTITHREAD 2653a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org 2753a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org#if defined(_WIN32) 2876e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org#include <errno.h> // NOLINT 2976e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org#include <process.h> // NOLINT 30085cab8fbb48aa8b9f7e3e6d5a2694afd0ffe2e0johannkoenig@chromium.org#include <windows.h> // NOLINT 3153a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.orgtypedef HANDLE pthread_t; 3253a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.orgtypedef CRITICAL_SECTION pthread_mutex_t; 3353a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.orgtypedef struct { 3453a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org HANDLE waiting_sem_; 3553a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org HANDLE received_sem_; 3653a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org HANDLE signal_event_; 3753a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org} pthread_cond_t; 3853a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org 3976e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org//------------------------------------------------------------------------------ 4076e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org// simplistic pthread emulation layer 4176e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org 4276e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org// _beginthreadex requires __stdcall 4376e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org#define THREADFN unsigned int __stdcall 4476e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org#define THREAD_RETURN(val) (unsigned int)((DWORD_PTR)val) 4576e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org 4676e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.orgstatic INLINE int pthread_create(pthread_t* const thread, const void* attr, 4776e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org unsigned int (__stdcall *start)(void*), 4876e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org void* arg) { 4976e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org (void)attr; 5076e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org *thread = (pthread_t)_beginthreadex(NULL, /* void *security */ 5176e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org 0, /* unsigned stack_size */ 5276e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org start, 5376e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org arg, 5476e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org 0, /* unsigned initflag */ 5576e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org NULL); /* unsigned *thrdaddr */ 5676e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org if (*thread == NULL) return 1; 5776e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org SetThreadPriority(*thread, THREAD_PRIORITY_ABOVE_NORMAL); 5876e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org return 0; 5976e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org} 6076e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org 6176e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.orgstatic INLINE int pthread_join(pthread_t thread, void** value_ptr) { 6276e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org (void)value_ptr; 6376e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org return (WaitForSingleObject(thread, INFINITE) != WAIT_OBJECT_0 || 6476e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org CloseHandle(thread) == 0); 6576e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org} 6676e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org 6776e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org// Mutex 6876e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.orgstatic INLINE int pthread_mutex_init(pthread_mutex_t *const mutex, 6976e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org void* mutexattr) { 7076e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org (void)mutexattr; 7176e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org InitializeCriticalSection(mutex); 7276e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org return 0; 7376e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org} 7476e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org 7576e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.orgstatic INLINE int pthread_mutex_trylock(pthread_mutex_t *const mutex) { 7676e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org return TryEnterCriticalSection(mutex) ? 0 : EBUSY; 7776e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org} 7876e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org 7976e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.orgstatic INLINE int pthread_mutex_lock(pthread_mutex_t *const mutex) { 8076e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org EnterCriticalSection(mutex); 8176e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org return 0; 8276e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org} 8353a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org 8476e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.orgstatic INLINE int pthread_mutex_unlock(pthread_mutex_t *const mutex) { 8576e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org LeaveCriticalSection(mutex); 8676e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org return 0; 8776e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org} 8876e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org 8976e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.orgstatic INLINE int pthread_mutex_destroy(pthread_mutex_t *const mutex) { 9076e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org DeleteCriticalSection(mutex); 9176e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org return 0; 9276e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org} 9376e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org 9476e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org// Condition 9576e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.orgstatic INLINE int pthread_cond_destroy(pthread_cond_t *const condition) { 9676e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org int ok = 1; 9776e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org ok &= (CloseHandle(condition->waiting_sem_) != 0); 9876e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org ok &= (CloseHandle(condition->received_sem_) != 0); 9976e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org ok &= (CloseHandle(condition->signal_event_) != 0); 10076e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org return !ok; 10176e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org} 10276e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org 10376e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.orgstatic INLINE int pthread_cond_init(pthread_cond_t *const condition, 10476e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org void* cond_attr) { 10576e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org (void)cond_attr; 10676e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org condition->waiting_sem_ = CreateSemaphore(NULL, 0, 1, NULL); 10776e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org condition->received_sem_ = CreateSemaphore(NULL, 0, 1, NULL); 10876e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org condition->signal_event_ = CreateEvent(NULL, FALSE, FALSE, NULL); 10976e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org if (condition->waiting_sem_ == NULL || 11076e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org condition->received_sem_ == NULL || 11176e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org condition->signal_event_ == NULL) { 11276e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org pthread_cond_destroy(condition); 11376e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org return 1; 11476e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org } 11576e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org return 0; 11676e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org} 11776e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org 11876e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.orgstatic INLINE int pthread_cond_signal(pthread_cond_t *const condition) { 11976e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org int ok = 1; 12076e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org if (WaitForSingleObject(condition->waiting_sem_, 0) == WAIT_OBJECT_0) { 12176e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org // a thread is waiting in pthread_cond_wait: allow it to be notified 12276e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org ok = SetEvent(condition->signal_event_); 12376e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org // wait until the event is consumed so the signaler cannot consume 12476e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org // the event via its own pthread_cond_wait. 12576e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org ok &= (WaitForSingleObject(condition->received_sem_, INFINITE) != 12676e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org WAIT_OBJECT_0); 12776e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org } 12876e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org return !ok; 12976e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org} 13076e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org 13176e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.orgstatic INLINE int pthread_cond_wait(pthread_cond_t *const condition, 13276e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org pthread_mutex_t *const mutex) { 13376e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org int ok; 13476e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org // note that there is a consumer available so the signal isn't dropped in 13576e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org // pthread_cond_signal 13676e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org if (!ReleaseSemaphore(condition->waiting_sem_, 1, NULL)) 13776e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org return 1; 13876e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org // now unlock the mutex so pthread_cond_signal may be issued 13976e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org pthread_mutex_unlock(mutex); 14076e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org ok = (WaitForSingleObject(condition->signal_event_, INFINITE) == 14176e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org WAIT_OBJECT_0); 14276e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org ok &= ReleaseSemaphore(condition->received_sem_, 1, NULL); 14376e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org pthread_mutex_lock(mutex); 14476e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org return !ok; 14576e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org} 14676e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org#else // _WIN32 147085cab8fbb48aa8b9f7e3e6d5a2694afd0ffe2e0johannkoenig@chromium.org#include <pthread.h> // NOLINT 14876e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org# define THREADFN void* 14976e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org# define THREAD_RETURN(val) val 15076e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org#endif 15153a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org 15276e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org#endif // CONFIG_MULTITHREAD 15353a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org 15453a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org// State of the worker thread object 15553a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.orgtypedef enum { 15653a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org NOT_OK = 0, // object is unusable 15753a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org OK, // ready to work 15853a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org WORK // busy finishing the current task 15953a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org} VP9WorkerStatus; 16053a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org 16153a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org// Function to be called by the worker thread. Takes two opaque pointers as 16253a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org// arguments (data1 and data2), and should return false in case of error. 16353a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.orgtypedef int (*VP9WorkerHook)(void*, void*); 16453a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org 165e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org// Platform-dependent implementation details for the worker. 166e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.orgtypedef struct VP9WorkerImpl VP9WorkerImpl; 167e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org 168e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org// Synchronization object used to launch job in the worker thread 16953a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.orgtypedef struct { 170e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org VP9WorkerImpl *impl_; 17153a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org VP9WorkerStatus status_; 17253a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org VP9WorkerHook hook; // hook to call 173e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org void *data1; // first argument passed to 'hook' 174e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org void *data2; // second argument passed to 'hook' 17553a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org int had_error; // return value of the last call to 'hook' 17653a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org} VP9Worker; 17753a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org 178e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org// The interface for all thread-worker related functions. All these functions 179e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org// must be implemented. 180e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.orgtypedef struct { 181e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org // Must be called first, before any other method. 182e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org void (*init)(VP9Worker *const worker); 183e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org // Must be called to initialize the object and spawn the thread. Re-entrant. 184e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org // Will potentially launch the thread. Returns false in case of error. 185e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org int (*reset)(VP9Worker *const worker); 186e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org // Makes sure the previous work is finished. Returns true if worker->had_error 187e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org // was not set and no error condition was triggered by the working thread. 188e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org int (*sync)(VP9Worker *const worker); 189e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org // Triggers the thread to call hook() with data1 and data2 arguments. These 190e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org // hook/data1/data2 values can be changed at any time before calling this 191e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org // function, but not be changed afterward until the next call to Sync(). 192e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org void (*launch)(VP9Worker *const worker); 193e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org // This function is similar to launch() except that it calls the 194e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org // hook directly instead of using a thread. Convenient to bypass the thread 195e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org // mechanism while still using the VP9Worker structs. sync() must 196e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org // still be called afterward (for error reporting). 197e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org void (*execute)(VP9Worker *const worker); 198e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org // Kill the thread and terminate the object. To use the object again, one 199e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org // must call reset() again. 200e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org void (*end)(VP9Worker *const worker); 201e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org} VP9WorkerInterface; 202e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org 203e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org// Install a new set of threading functions, overriding the defaults. This 204e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org// should be done before any workers are started, i.e., before any encoding or 205e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org// decoding takes place. The contents of the interface struct are copied, it 206e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org// is safe to free the corresponding memory after this call. This function is 207e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org// not thread-safe. Return false in case of invalid pointer or methods. 208e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.orgint vp9_set_worker_interface(const VP9WorkerInterface *const winterface); 209e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org 210e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.org// Retrieve the currently set thread worker interface. 211e2064011d36b2008099446503f28e64d445060ecjohannkoenig@chromium.orgconst VP9WorkerInterface *vp9_get_worker_interface(void); 21253a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org 21353a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org//------------------------------------------------------------------------------ 21453a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org 215dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org#ifdef __cplusplus 21653a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org} // extern "C" 21753a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org#endif 21853a13f1fa964820f7a8f9d3932a6f3c0433f8bf5fgalligan@chromium.org 219085cab8fbb48aa8b9f7e3e6d5a2694afd0ffe2e0johannkoenig@chromium.org#endif // VP9_DECODER_VP9_THREAD_H_ 220