diff options
Diffstat (limited to 'thirdparty/libvpx/vpx_util/vpx_thread.h')
| -rw-r--r-- | thirdparty/libvpx/vpx_util/vpx_thread.h | 369 |
1 files changed, 0 insertions, 369 deletions
diff --git a/thirdparty/libvpx/vpx_util/vpx_thread.h b/thirdparty/libvpx/vpx_util/vpx_thread.h deleted file mode 100644 index 2062abd75f..0000000000 --- a/thirdparty/libvpx/vpx_util/vpx_thread.h +++ /dev/null @@ -1,369 +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 7bd451b124ae3b81596abfbcc823e3cb129d3a38 src/utils/thread.h - -#ifndef VPX_THREAD_H_ -#define VPX_THREAD_H_ - -#include "./vpx_config.h" - -#ifdef __cplusplus -extern "C" { -#endif - -// Set maximum decode threads to be 8 due to the limit of frame buffers -// and not enough semaphores in the emulation layer on windows. -#define MAX_DECODE_THREADS 8 - -#if CONFIG_MULTITHREAD - -#if defined(_WIN32) && !HAVE_PTHREAD_H -#include <errno.h> // NOLINT -#include <process.h> // NOLINT -#include <windows.h> // NOLINT -typedef HANDLE pthread_t; -typedef CRITICAL_SECTION pthread_mutex_t; -typedef struct { - HANDLE waiting_sem_; - HANDLE received_sem_; - HANDLE signal_event_; -} pthread_cond_t; - -//------------------------------------------------------------------------------ -// simplistic pthread emulation layer - -// _beginthreadex requires __stdcall -#define THREADFN unsigned int __stdcall -#define THREAD_RETURN(val) (unsigned int)((DWORD_PTR)val) - -static INLINE 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 INLINE int pthread_join(pthread_t thread, void** value_ptr) { - (void)value_ptr; - return (WaitForSingleObject(thread, INFINITE) != WAIT_OBJECT_0 || - CloseHandle(thread) == 0); -} - -// Mutex -static INLINE int pthread_mutex_init(pthread_mutex_t *const mutex, - void* mutexattr) { - (void)mutexattr; - InitializeCriticalSection(mutex); - return 0; -} - -static INLINE int pthread_mutex_trylock(pthread_mutex_t *const mutex) { - return TryEnterCriticalSection(mutex) ? 0 : EBUSY; -} - -static INLINE int pthread_mutex_lock(pthread_mutex_t *const mutex) { - EnterCriticalSection(mutex); - return 0; -} - -static INLINE int pthread_mutex_unlock(pthread_mutex_t *const mutex) { - LeaveCriticalSection(mutex); - return 0; -} - -static INLINE int pthread_mutex_destroy(pthread_mutex_t *const mutex) { - DeleteCriticalSection(mutex); - return 0; -} - -// Condition -static INLINE 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 INLINE int pthread_cond_init(pthread_cond_t *const condition, - void* cond_attr) { - (void)cond_attr; - condition->waiting_sem_ = CreateSemaphore(NULL, 0, MAX_DECODE_THREADS, NULL); - condition->received_sem_ = CreateSemaphore(NULL, 0, MAX_DECODE_THREADS, 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 INLINE 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 INLINE 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; -} -#elif defined(__OS2__) -#define INCL_DOS -#include <os2.h> // NOLINT - -#include <errno.h> // NOLINT -#include <stdlib.h> // NOLINT -#include <sys/builtin.h> // NOLINT - -#define pthread_t TID -#define pthread_mutex_t HMTX - -typedef struct { - HEV event_sem_; - HEV ack_sem_; - volatile unsigned wait_count_; -} pthread_cond_t; - -//------------------------------------------------------------------------------ -// simplistic pthread emulation layer - -#define THREADFN void * -#define THREAD_RETURN(val) (val) - -typedef struct { - void* (*start_)(void*); - void* arg_; -} thread_arg; - -static void thread_start(void* arg) { - thread_arg targ = *(thread_arg *)arg; - free(arg); - - targ.start_(targ.arg_); -} - -static INLINE int pthread_create(pthread_t* const thread, const void* attr, - void* (*start)(void*), - void* arg) { - int tid; - thread_arg *targ = (thread_arg *)malloc(sizeof(*targ)); - if (targ == NULL) return 1; - - (void)attr; - - targ->start_ = start; - targ->arg_ = arg; - tid = (pthread_t)_beginthread(thread_start, NULL, 1024 * 1024, targ); - if (tid == -1) { - free(targ); - return 1; - } - - *thread = tid; - return 0; -} - -static INLINE int pthread_join(pthread_t thread, void** value_ptr) { - (void)value_ptr; - return DosWaitThread(&thread, DCWW_WAIT) != 0; -} - -// Mutex -static INLINE int pthread_mutex_init(pthread_mutex_t *const mutex, - void* mutexattr) { - (void)mutexattr; - return DosCreateMutexSem(NULL, mutex, 0, FALSE) != 0; -} - -static INLINE int pthread_mutex_trylock(pthread_mutex_t *const mutex) { - return DosRequestMutexSem(*mutex, SEM_IMMEDIATE_RETURN) == 0 ? 0 : EBUSY; -} - -static INLINE int pthread_mutex_lock(pthread_mutex_t *const mutex) { - return DosRequestMutexSem(*mutex, SEM_INDEFINITE_WAIT) != 0; -} - -static INLINE int pthread_mutex_unlock(pthread_mutex_t *const mutex) { - return DosReleaseMutexSem(*mutex) != 0; -} - -static INLINE int pthread_mutex_destroy(pthread_mutex_t *const mutex) { - return DosCloseMutexSem(*mutex) != 0; -} - -// Condition -static INLINE int pthread_cond_destroy(pthread_cond_t *const condition) { - int ok = 1; - ok &= DosCloseEventSem(condition->event_sem_) == 0; - ok &= DosCloseEventSem(condition->ack_sem_) == 0; - return !ok; -} - -static INLINE int pthread_cond_init(pthread_cond_t *const condition, - void* cond_attr) { - int ok = 1; - (void)cond_attr; - - ok &= DosCreateEventSem(NULL, &condition->event_sem_, DCE_POSTONE, FALSE) - == 0; - ok &= DosCreateEventSem(NULL, &condition->ack_sem_, DCE_POSTONE, FALSE) == 0; - if (!ok) { - pthread_cond_destroy(condition); - return 1; - } - condition->wait_count_ = 0; - return 0; -} - -static INLINE int pthread_cond_signal(pthread_cond_t *const condition) { - int ok = 1; - - if (!__atomic_cmpxchg32(&condition->wait_count_, 0, 0)) { - ok &= DosPostEventSem(condition->event_sem_) == 0; - ok &= DosWaitEventSem(condition->ack_sem_, SEM_INDEFINITE_WAIT) == 0; - } - - return !ok; -} - -static INLINE int pthread_cond_broadcast(pthread_cond_t *const condition) { - int ok = 1; - - while (!__atomic_cmpxchg32(&condition->wait_count_, 0, 0)) - ok &= pthread_cond_signal(condition) == 0; - - return !ok; -} - -static INLINE int pthread_cond_wait(pthread_cond_t *const condition, - pthread_mutex_t *const mutex) { - int ok = 1; - - __atomic_increment(&condition->wait_count_); - - ok &= pthread_mutex_unlock(mutex) == 0; - - ok &= DosWaitEventSem(condition->event_sem_, SEM_INDEFINITE_WAIT) == 0; - - __atomic_decrement(&condition->wait_count_); - - ok &= DosPostEventSem(condition->ack_sem_) == 0; - - pthread_mutex_lock(mutex); - - return !ok; -} -#else // _WIN32 -#include <pthread.h> // NOLINT -# define THREADFN void* -# define THREAD_RETURN(val) val -#endif - -#endif // CONFIG_MULTITHREAD - -// State of the worker thread object -typedef enum { - NOT_OK = 0, // object is unusable - OK, // ready to work - WORK // busy finishing the current task -} VPxWorkerStatus; - -// Function to be called by the worker thread. Takes two opaque pointers as -// arguments (data1 and data2), and should return false in case of error. -typedef int (*VPxWorkerHook)(void*, void*); - -// Platform-dependent implementation details for the worker. -typedef struct VPxWorkerImpl VPxWorkerImpl; - -// Synchronization object used to launch job in the worker thread -typedef struct { - VPxWorkerImpl *impl_; - VPxWorkerStatus status_; - VPxWorkerHook hook; // hook to call - void *data1; // first argument passed to 'hook' - void *data2; // second argument passed to 'hook' - int had_error; // return value of the last call to 'hook' -} VPxWorker; - -// The interface for all thread-worker related functions. All these functions -// must be implemented. -typedef struct { - // Must be called first, before any other method. - void (*init)(VPxWorker *const worker); - // Must be called to initialize the object and spawn the thread. Re-entrant. - // Will potentially launch the thread. Returns false in case of error. - int (*reset)(VPxWorker *const worker); - // Makes sure the previous work is finished. Returns true if worker->had_error - // was not set and no error condition was triggered by the working thread. - int (*sync)(VPxWorker *const worker); - // Triggers the thread to call hook() with data1 and data2 arguments. These - // hook/data1/data2 values can be changed at any time before calling this - // function, but not be changed afterward until the next call to Sync(). - void (*launch)(VPxWorker *const worker); - // This function is similar to launch() except that it calls the - // hook directly instead of using a thread. Convenient to bypass the thread - // mechanism while still using the VPxWorker structs. sync() must - // still be called afterward (for error reporting). - void (*execute)(VPxWorker *const worker); - // Kill the thread and terminate the object. To use the object again, one - // must call reset() again. - void (*end)(VPxWorker *const worker); -} VPxWorkerInterface; - -// Install a new set of threading functions, overriding the defaults. This -// should be done before any workers are started, i.e., before any encoding or -// decoding takes place. The contents of the interface struct are copied, it -// is safe to free the corresponding memory after this call. This function is -// not thread-safe. Return false in case of invalid pointer or methods. -int vpx_set_worker_interface(const VPxWorkerInterface *const winterface); - -// Retrieve the currently set thread worker interface. -const VPxWorkerInterface *vpx_get_worker_interface(void); - -//------------------------------------------------------------------------------ - -#ifdef __cplusplus -} // extern "C" -#endif - -#endif // VPX_THREAD_H_ |