diff options
Diffstat (limited to 'third_party/aom/aom_util/aom_thread.c')
| -rw-r--r-- | third_party/aom/aom_util/aom_thread.c | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/third_party/aom/aom_util/aom_thread.c b/third_party/aom/aom_util/aom_thread.c deleted file mode 100644 index cae9f5e25..000000000 --- a/third_party/aom/aom_util/aom_thread.c +++ /dev/null @@ -1,184 +0,0 @@ -/* - * Copyright (c) 2016, Alliance for Open Media. All rights reserved - * - * This source code is subject to the terms of the BSD 2 Clause License and - * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License - * was not distributed with this source code in the LICENSE file, you can - * obtain it at www.aomedia.org/license/software. If the Alliance for Open - * Media Patent License 1.0 was not distributed with this source code in the - * PATENTS file, you can obtain it at www.aomedia.org/license/patent. - */ -// -// Multi-threaded worker -// -// Original source: -// https://chromium.googlesource.com/webm/libwebp - -#include <assert.h> -#include <string.h> // for memset() - -#include "aom_mem/aom_mem.h" -#include "aom_util/aom_thread.h" - -#if CONFIG_MULTITHREAD - -struct AVxWorkerImpl { - pthread_mutex_t mutex_; - pthread_cond_t condition_; - pthread_t thread_; -}; - -//------------------------------------------------------------------------------ - -static void execute(AVxWorker *const worker); // Forward declaration. - -static THREADFN thread_loop(void *ptr) { - AVxWorker *const worker = (AVxWorker *)ptr; - int done = 0; - while (!done) { - pthread_mutex_lock(&worker->impl_->mutex_); - while (worker->status_ == OK) { // wait in idling mode - pthread_cond_wait(&worker->impl_->condition_, &worker->impl_->mutex_); - } - if (worker->status_ == WORK) { - execute(worker); - worker->status_ = OK; - } else if (worker->status_ == NOT_OK) { // finish the worker - done = 1; - } - // signal to the main thread that we're done (for sync()) - pthread_cond_signal(&worker->impl_->condition_); - pthread_mutex_unlock(&worker->impl_->mutex_); - } - return THREAD_RETURN(NULL); // Thread is finished -} - -// main thread state control -static void change_state(AVxWorker *const worker, AVxWorkerStatus new_status) { - // No-op when attempting to change state on a thread that didn't come up. - // Checking status_ without acquiring the lock first would result in a data - // race. - if (worker->impl_ == NULL) return; - - pthread_mutex_lock(&worker->impl_->mutex_); - if (worker->status_ >= OK) { - // wait for the worker to finish - while (worker->status_ != OK) { - pthread_cond_wait(&worker->impl_->condition_, &worker->impl_->mutex_); - } - // assign new status and release the working thread if needed - if (new_status != OK) { - worker->status_ = new_status; - pthread_cond_signal(&worker->impl_->condition_); - } - } - pthread_mutex_unlock(&worker->impl_->mutex_); -} - -#endif // CONFIG_MULTITHREAD - -//------------------------------------------------------------------------------ - -static void init(AVxWorker *const worker) { - memset(worker, 0, sizeof(*worker)); - worker->status_ = NOT_OK; -} - -static int sync(AVxWorker *const worker) { -#if CONFIG_MULTITHREAD - change_state(worker, OK); -#endif - assert(worker->status_ <= OK); - return !worker->had_error; -} - -static int reset(AVxWorker *const worker) { - int ok = 1; - worker->had_error = 0; - if (worker->status_ < OK) { -#if CONFIG_MULTITHREAD - worker->impl_ = (AVxWorkerImpl *)aom_calloc(1, sizeof(*worker->impl_)); - if (worker->impl_ == NULL) { - return 0; - } - if (pthread_mutex_init(&worker->impl_->mutex_, NULL)) { - goto Error; - } - if (pthread_cond_init(&worker->impl_->condition_, NULL)) { - pthread_mutex_destroy(&worker->impl_->mutex_); - goto Error; - } - pthread_mutex_lock(&worker->impl_->mutex_); - ok = !pthread_create(&worker->impl_->thread_, NULL, thread_loop, worker); - if (ok) worker->status_ = OK; - pthread_mutex_unlock(&worker->impl_->mutex_); - if (!ok) { - pthread_mutex_destroy(&worker->impl_->mutex_); - pthread_cond_destroy(&worker->impl_->condition_); - Error: - aom_free(worker->impl_); - worker->impl_ = NULL; - return 0; - } -#else - worker->status_ = OK; -#endif - } else if (worker->status_ > OK) { - ok = sync(worker); - } - assert(!ok || (worker->status_ == OK)); - return ok; -} - -static void execute(AVxWorker *const worker) { - if (worker->hook != NULL) { - worker->had_error |= !worker->hook(worker->data1, worker->data2); - } -} - -static void launch(AVxWorker *const worker) { -#if CONFIG_MULTITHREAD - change_state(worker, WORK); -#else - execute(worker); -#endif -} - -static void end(AVxWorker *const worker) { -#if CONFIG_MULTITHREAD - if (worker->impl_ != NULL) { - change_state(worker, NOT_OK); - pthread_join(worker->impl_->thread_, NULL); - pthread_mutex_destroy(&worker->impl_->mutex_); - pthread_cond_destroy(&worker->impl_->condition_); - aom_free(worker->impl_); - worker->impl_ = NULL; - } -#else - worker->status_ = NOT_OK; - assert(worker->impl_ == NULL); -#endif - assert(worker->status_ == NOT_OK); -} - -//------------------------------------------------------------------------------ - -static AVxWorkerInterface g_worker_interface = { init, reset, sync, - launch, execute, end }; - -int aom_set_worker_interface(const AVxWorkerInterface *const winterface) { - if (winterface == NULL || winterface->init == NULL || - winterface->reset == NULL || winterface->sync == NULL || - winterface->launch == NULL || winterface->execute == NULL || - winterface->end == NULL) { - return 0; - } - g_worker_interface = *winterface; - return 1; -} - -const AVxWorkerInterface *aom_get_worker_interface(void) { - return &g_worker_interface; -} - -//------------------------------------------------------------------------------ |