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Diffstat (limited to 'drivers/webpold/utils/thread.c')
-rw-r--r--drivers/webpold/utils/thread.c247
1 files changed, 0 insertions, 247 deletions
diff --git a/drivers/webpold/utils/thread.c b/drivers/webpold/utils/thread.c
deleted file mode 100644
index ce89cf9dc7..0000000000
--- a/drivers/webpold/utils/thread.c
+++ /dev/null
@@ -1,247 +0,0 @@
-// Copyright 2011 Google Inc. All Rights Reserved.
-//
-// This code is licensed under the same terms as WebM:
-// Software License Agreement: http://www.webmproject.org/license/software/
-// Additional IP Rights Grant: http://www.webmproject.org/license/additional/
-// -----------------------------------------------------------------------------
-//
-// Multi-threaded worker
-//
-// Author: Skal (pascal.massimino@gmail.com)
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <assert.h>
-#include <string.h> // for memset()
-#include "./thread.h"
-
-#if defined(__cplusplus) || defined(c_plusplus)
-extern "C" {
-#endif
-
-#ifdef WEBP_USE_THREAD
-
-#if defined(_WIN32)
-
-//------------------------------------------------------------------------------
-// simplistic pthread emulation layer
-
-#include <process.h>
-
-// _beginthreadex requires __stdcall
-#define THREADFN unsigned int __stdcall
-#define THREAD_RETURN(val) (unsigned int)((DWORD_PTR)val)
-
-static int pthread_create(pthread_t* const thread, const void* attr,
- unsigned int (__stdcall *start)(void*), void* arg) {
- (void)attr;
- *thread = (pthread_t)_beginthreadex(NULL, /* void *security */
- 0, /* unsigned stack_size */
- start,
- arg,
- 0, /* unsigned initflag */
- NULL); /* unsigned *thrdaddr */
- if (*thread == NULL) return 1;
- SetThreadPriority(*thread, THREAD_PRIORITY_ABOVE_NORMAL);
- return 0;
-}
-
-static int pthread_join(pthread_t thread, void** value_ptr) {
- (void)value_ptr;
- return (WaitForSingleObject(thread, INFINITE) != WAIT_OBJECT_0 ||
- CloseHandle(thread) == 0);
-}
-
-// Mutex
-static int pthread_mutex_init(pthread_mutex_t* const mutex, void* mutexattr) {
- (void)mutexattr;
- InitializeCriticalSection(mutex);
- return 0;
-}
-
-static int pthread_mutex_lock(pthread_mutex_t* const mutex) {
- EnterCriticalSection(mutex);
- return 0;
-}
-
-static int pthread_mutex_unlock(pthread_mutex_t* const mutex) {
- LeaveCriticalSection(mutex);
- return 0;
-}
-
-static int pthread_mutex_destroy(pthread_mutex_t* const mutex) {
- DeleteCriticalSection(mutex);
- return 0;
-}
-
-// Condition
-static int pthread_cond_destroy(pthread_cond_t* const condition) {
- int ok = 1;
- ok &= (CloseHandle(condition->waiting_sem_) != 0);
- ok &= (CloseHandle(condition->received_sem_) != 0);
- ok &= (CloseHandle(condition->signal_event_) != 0);
- return !ok;
-}
-
-static int pthread_cond_init(pthread_cond_t* const condition, void* cond_attr) {
- (void)cond_attr;
- condition->waiting_sem_ = CreateSemaphore(NULL, 0, 1, NULL);
- condition->received_sem_ = CreateSemaphore(NULL, 0, 1, NULL);
- condition->signal_event_ = CreateEvent(NULL, FALSE, FALSE, NULL);
- if (condition->waiting_sem_ == NULL ||
- condition->received_sem_ == NULL ||
- condition->signal_event_ == NULL) {
- pthread_cond_destroy(condition);
- return 1;
- }
- return 0;
-}
-
-static int pthread_cond_signal(pthread_cond_t* const condition) {
- int ok = 1;
- if (WaitForSingleObject(condition->waiting_sem_, 0) == WAIT_OBJECT_0) {
- // a thread is waiting in pthread_cond_wait: allow it to be notified
- ok = SetEvent(condition->signal_event_);
- // wait until the event is consumed so the signaler cannot consume
- // the event via its own pthread_cond_wait.
- ok &= (WaitForSingleObject(condition->received_sem_, INFINITE) !=
- WAIT_OBJECT_0);
- }
- return !ok;
-}
-
-static int pthread_cond_wait(pthread_cond_t* const condition,
- pthread_mutex_t* const mutex) {
- int ok;
- // note that there is a consumer available so the signal isn't dropped in
- // pthread_cond_signal
- if (!ReleaseSemaphore(condition->waiting_sem_, 1, NULL))
- return 1;
- // now unlock the mutex so pthread_cond_signal may be issued
- pthread_mutex_unlock(mutex);
- ok = (WaitForSingleObject(condition->signal_event_, INFINITE) ==
- WAIT_OBJECT_0);
- ok &= ReleaseSemaphore(condition->received_sem_, 1, NULL);
- pthread_mutex_lock(mutex);
- return !ok;
-}
-
-#else // _WIN32
-# define THREADFN void*
-# define THREAD_RETURN(val) val
-#endif
-
-//------------------------------------------------------------------------------
-
-static THREADFN WebPWorkerThreadLoop(void *ptr) { // thread loop
- WebPWorker* const worker = (WebPWorker*)ptr;
- int done = 0;
- while (!done) {
- pthread_mutex_lock(&worker->mutex_);
- while (worker->status_ == OK) { // wait in idling mode
- pthread_cond_wait(&worker->condition_, &worker->mutex_);
- }
- if (worker->status_ == WORK) {
- if (worker->hook) {
- worker->had_error |= !worker->hook(worker->data1, worker->data2);
- }
- 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->condition_);
- pthread_mutex_unlock(&worker->mutex_);
- }
- return THREAD_RETURN(NULL); // Thread is finished
-}
-
-// main thread state control
-static void WebPWorkerChangeState(WebPWorker* const worker,
- WebPWorkerStatus new_status) {
- // no-op when attempting to change state on a thread that didn't come up
- if (worker->status_ < OK) return;
-
- pthread_mutex_lock(&worker->mutex_);
- // wait for the worker to finish
- while (worker->status_ != OK) {
- pthread_cond_wait(&worker->condition_, &worker->mutex_);
- }
- // assign new status and release the working thread if needed
- if (new_status != OK) {
- worker->status_ = new_status;
- pthread_cond_signal(&worker->condition_);
- }
- pthread_mutex_unlock(&worker->mutex_);
-}
-
-#endif
-
-//------------------------------------------------------------------------------
-
-void WebPWorkerInit(WebPWorker* const worker) {
- memset(worker, 0, sizeof(*worker));
- worker->status_ = NOT_OK;
-}
-
-int WebPWorkerSync(WebPWorker* const worker) {
-#ifdef WEBP_USE_THREAD
- WebPWorkerChangeState(worker, OK);
-#endif
- assert(worker->status_ <= OK);
- return !worker->had_error;
-}
-
-int WebPWorkerReset(WebPWorker* const worker) {
- int ok = 1;
- worker->had_error = 0;
- if (worker->status_ < OK) {
-#ifdef WEBP_USE_THREAD
- if (pthread_mutex_init(&worker->mutex_, NULL) ||
- pthread_cond_init(&worker->condition_, NULL)) {
- return 0;
- }
- pthread_mutex_lock(&worker->mutex_);
- ok = !pthread_create(&worker->thread_, NULL, WebPWorkerThreadLoop, worker);
- if (ok) worker->status_ = OK;
- pthread_mutex_unlock(&worker->mutex_);
-#else
- worker->status_ = OK;
-#endif
- } else if (worker->status_ > OK) {
- ok = WebPWorkerSync(worker);
- }
- assert(!ok || (worker->status_ == OK));
- return ok;
-}
-
-void WebPWorkerLaunch(WebPWorker* const worker) {
-#ifdef WEBP_USE_THREAD
- WebPWorkerChangeState(worker, WORK);
-#else
- if (worker->hook)
- worker->had_error |= !worker->hook(worker->data1, worker->data2);
-#endif
-}
-
-void WebPWorkerEnd(WebPWorker* const worker) {
- if (worker->status_ >= OK) {
-#ifdef WEBP_USE_THREAD
- WebPWorkerChangeState(worker, NOT_OK);
- pthread_join(worker->thread_, NULL);
- pthread_mutex_destroy(&worker->mutex_);
- pthread_cond_destroy(&worker->condition_);
-#else
- worker->status_ = NOT_OK;
-#endif
- }
- assert(worker->status_ == NOT_OK);
-}
-
-//------------------------------------------------------------------------------
-
-#if defined(__cplusplus) || defined(c_plusplus)
-} // extern "C"
-#endif
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