Index: source/libvpx/vp9/decoder/vp9_thread.c |
=================================================================== |
--- source/libvpx/vp9/decoder/vp9_thread.c (revision 282873) |
+++ source/libvpx/vp9/decoder/vp9_thread.c (working copy) |
@@ -1,183 +0,0 @@ |
-// Copyright 2013 Google Inc. All Rights Reserved. |
-// |
-// Use of this source code is governed by a BSD-style license |
-// that can be found in the COPYING 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. |
-// ----------------------------------------------------------------------------- |
-// |
-// Multi-threaded worker |
-// |
-// Original source: |
-// http://git.chromium.org/webm/libwebp.git |
-// 100644 blob 08ad4e1fecba302bf1247645e84a7d2779956bc3 src/utils/thread.c |
- |
-#include <assert.h> |
-#include <string.h> // for memset() |
-#include "./vp9_thread.h" |
-#include "vpx_mem/vpx_mem.h" |
- |
-#if CONFIG_MULTITHREAD |
- |
-struct VP9WorkerImpl { |
- pthread_mutex_t mutex_; |
- pthread_cond_t condition_; |
- pthread_t thread_; |
-}; |
- |
-//------------------------------------------------------------------------------ |
- |
-static void execute(VP9Worker *const worker); // Forward declaration. |
- |
-static THREADFN thread_loop(void *ptr) { |
- VP9Worker *const worker = (VP9Worker*)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(VP9Worker *const worker, |
- VP9WorkerStatus 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(VP9Worker *const worker) { |
- memset(worker, 0, sizeof(*worker)); |
- worker->status_ = NOT_OK; |
-} |
- |
-static int sync(VP9Worker *const worker) { |
-#if CONFIG_MULTITHREAD |
- change_state(worker, OK); |
-#endif |
- assert(worker->status_ <= OK); |
- return !worker->had_error; |
-} |
- |
-static int reset(VP9Worker *const worker) { |
- int ok = 1; |
- worker->had_error = 0; |
- if (worker->status_ < OK) { |
-#if CONFIG_MULTITHREAD |
- worker->impl_ = (VP9WorkerImpl*)vpx_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: |
- vpx_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(VP9Worker *const worker) { |
- if (worker->hook != NULL) { |
- worker->had_error |= !worker->hook(worker->data1, worker->data2); |
- } |
-} |
- |
-static void launch(VP9Worker *const worker) { |
-#if CONFIG_MULTITHREAD |
- change_state(worker, WORK); |
-#else |
- execute(worker); |
-#endif |
-} |
- |
-static void end(VP9Worker *const worker) { |
- if (worker->status_ >= OK) { |
-#if CONFIG_MULTITHREAD |
- change_state(worker, NOT_OK); |
- pthread_join(worker->impl_->thread_, NULL); |
- pthread_mutex_destroy(&worker->impl_->mutex_); |
- pthread_cond_destroy(&worker->impl_->condition_); |
-#else |
- worker->status_ = NOT_OK; |
-#endif |
- } |
- vpx_free(worker->impl_); |
- worker->impl_ = NULL; |
- assert(worker->status_ == NOT_OK); |
-} |
- |
-//------------------------------------------------------------------------------ |
- |
-static VP9WorkerInterface g_worker_interface = { |
- init, reset, sync, launch, execute, end |
-}; |
- |
-int vp9_set_worker_interface(const VP9WorkerInterface* 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 VP9WorkerInterface *vp9_get_worker_interface(void) { |
- return &g_worker_interface; |
-} |
- |
-//------------------------------------------------------------------------------ |