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-rw-r--r--src/main/jni/libwebp/utils/thread.c309
1 files changed, 0 insertions, 309 deletions
diff --git a/src/main/jni/libwebp/utils/thread.c b/src/main/jni/libwebp/utils/thread.c
deleted file mode 100644
index 264210ba2..000000000
--- a/src/main/jni/libwebp/utils/thread.c
+++ /dev/null
@@ -1,309 +0,0 @@
-// Copyright 2011 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
-//
-// Author: Skal (pascal.massimino@gmail.com)
-
-#include <assert.h>
-#include <string.h> // for memset()
-#include "./thread.h"
-#include "./utils.h"
-
-#ifdef WEBP_USE_THREAD
-
-#if defined(_WIN32)
-
-#include <windows.h>
-typedef HANDLE pthread_t;
-typedef CRITICAL_SECTION pthread_mutex_t;
-typedef struct {
- HANDLE waiting_sem_;
- HANDLE received_sem_;
- HANDLE signal_event_;
-} pthread_cond_t;
-
-#else // !_WIN32
-
-#include <pthread.h>
-
-#endif // _WIN32
-
-struct WebPWorkerImpl {
- pthread_mutex_t mutex_;
- pthread_cond_t condition_;
- pthread_t 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 // _WIN32
-
-//------------------------------------------------------------------------------
-
-static void Execute(WebPWorker* const worker); // Forward declaration.
-
-static THREADFN ThreadLoop(void* ptr) {
- WebPWorker* const worker = (WebPWorker*)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 ChangeState(WebPWorker* const worker,
- WebPWorkerStatus 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 // WEBP_USE_THREAD
-
-//------------------------------------------------------------------------------
-
-static void Init(WebPWorker* const worker) {
- memset(worker, 0, sizeof(*worker));
- worker->status_ = NOT_OK;
-}
-
-static int Sync(WebPWorker* const worker) {
-#ifdef WEBP_USE_THREAD
- ChangeState(worker, OK);
-#endif
- assert(worker->status_ <= OK);
- return !worker->had_error;
-}
-
-static int Reset(WebPWorker* const worker) {
- int ok = 1;
- worker->had_error = 0;
- if (worker->status_ < OK) {
-#ifdef WEBP_USE_THREAD
- worker->impl_ = (WebPWorkerImpl*)WebPSafeCalloc(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, ThreadLoop, 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:
- WebPSafeFree(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(WebPWorker* const worker) {
- if (worker->hook != NULL) {
- worker->had_error |= !worker->hook(worker->data1, worker->data2);
- }
-}
-
-static void Launch(WebPWorker* const worker) {
-#ifdef WEBP_USE_THREAD
- ChangeState(worker, WORK);
-#else
- Execute(worker);
-#endif
-}
-
-static void End(WebPWorker* const worker) {
-#ifdef WEBP_USE_THREAD
- if (worker->impl_ != NULL) {
- ChangeState(worker, NOT_OK);
- pthread_join(worker->impl_->thread_, NULL);
- pthread_mutex_destroy(&worker->impl_->mutex_);
- pthread_cond_destroy(&worker->impl_->condition_);
- WebPSafeFree(worker->impl_);
- worker->impl_ = NULL;
- }
-#else
- worker->status_ = NOT_OK;
- assert(worker->impl_ == NULL);
-#endif
- assert(worker->status_ == NOT_OK);
-}
-
-//------------------------------------------------------------------------------
-
-static WebPWorkerInterface g_worker_interface = {
- Init, Reset, Sync, Launch, Execute, End
-};
-
-int WebPSetWorkerInterface(const WebPWorkerInterface* 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 WebPWorkerInterface* WebPGetWorkerInterface(void) {
- return &g_worker_interface;
-}
-
-//------------------------------------------------------------------------------
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-02 12:52:57 +0000