mirror of
https://github.com/pineappleEA/pineapple-src.git
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192 lines
5.2 KiB
C
Executable File
192 lines
5.2 KiB
C
Executable File
/*
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* Copyright (C) 2010-2011 x264 project
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*
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* Authors: Steven Walters <kemuri9@gmail.com>
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* Pegasys Inc. <http://www.pegasys-inc.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* w32threads to pthreads wrapper
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*/
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#ifndef COMPAT_W32PTHREADS_H
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#define COMPAT_W32PTHREADS_H
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/* Build up a pthread-like API using underlying Windows API. Have only static
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* methods so as to not conflict with a potentially linked in pthread-win32
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* library.
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* As most functions here are used without checking return values,
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* only implement return values as necessary. */
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <process.h>
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#include <time.h>
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#include "libavutil/attributes.h"
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#include "libavutil/common.h"
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#include "libavutil/internal.h"
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#include "libavutil/mem.h"
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#include "libavutil/time.h"
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typedef struct pthread_t {
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void *handle;
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void *(*func)(void* arg);
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void *arg;
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void *ret;
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} pthread_t;
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/* use light weight mutex/condition variable API for Windows Vista and later */
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typedef SRWLOCK pthread_mutex_t;
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typedef CONDITION_VARIABLE pthread_cond_t;
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#define PTHREAD_MUTEX_INITIALIZER SRWLOCK_INIT
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#define PTHREAD_COND_INITIALIZER CONDITION_VARIABLE_INIT
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#define InitializeCriticalSection(x) InitializeCriticalSectionEx(x, 0, 0)
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#define WaitForSingleObject(a, b) WaitForSingleObjectEx(a, b, FALSE)
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#define PTHREAD_CANCEL_ENABLE 1
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#define PTHREAD_CANCEL_DISABLE 0
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static av_unused unsigned __stdcall attribute_align_arg win32thread_worker(void *arg)
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{
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pthread_t *h = (pthread_t*)arg;
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h->ret = h->func(h->arg);
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return 0;
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}
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static av_unused int pthread_create(pthread_t *thread, const void *unused_attr,
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void *(*start_routine)(void*), void *arg)
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{
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thread->func = start_routine;
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thread->arg = arg;
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#if HAVE_WINRT
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thread->handle = (void*)CreateThread(NULL, 0, win32thread_worker, thread,
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0, NULL);
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#else
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thread->handle = (void*)_beginthreadex(NULL, 0, win32thread_worker, thread,
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0, NULL);
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#endif
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return !thread->handle;
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}
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static av_unused int pthread_join(pthread_t thread, void **value_ptr)
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{
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DWORD ret = WaitForSingleObject(thread.handle, INFINITE);
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if (ret != WAIT_OBJECT_0) {
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if (ret == WAIT_ABANDONED)
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return EINVAL;
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else
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return EDEADLK;
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}
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if (value_ptr)
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*value_ptr = thread.ret;
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CloseHandle(thread.handle);
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return 0;
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}
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static inline int pthread_mutex_init(pthread_mutex_t *m, void* attr)
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{
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InitializeSRWLock(m);
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return 0;
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}
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static inline int pthread_mutex_destroy(pthread_mutex_t *m)
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{
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/* Unlocked SWR locks use no resources */
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return 0;
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}
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static inline int pthread_mutex_lock(pthread_mutex_t *m)
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{
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AcquireSRWLockExclusive(m);
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return 0;
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}
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static inline int pthread_mutex_unlock(pthread_mutex_t *m)
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{
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ReleaseSRWLockExclusive(m);
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return 0;
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}
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typedef INIT_ONCE pthread_once_t;
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#define PTHREAD_ONCE_INIT INIT_ONCE_STATIC_INIT
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static av_unused int pthread_once(pthread_once_t *once_control, void (*init_routine)(void))
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{
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BOOL pending = FALSE;
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InitOnceBeginInitialize(once_control, 0, &pending, NULL);
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if (pending)
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init_routine();
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InitOnceComplete(once_control, 0, NULL);
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return 0;
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}
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static inline int pthread_cond_init(pthread_cond_t *cond, const void *unused_attr)
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{
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InitializeConditionVariable(cond);
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return 0;
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}
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/* native condition variables do not destroy */
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static inline int pthread_cond_destroy(pthread_cond_t *cond)
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{
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return 0;
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}
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static inline int pthread_cond_broadcast(pthread_cond_t *cond)
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{
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WakeAllConditionVariable(cond);
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return 0;
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}
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static inline int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
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{
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SleepConditionVariableSRW(cond, mutex, INFINITE, 0);
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return 0;
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}
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static inline int pthread_cond_timedwait(pthread_cond_t *cond, pthread_mutex_t *mutex,
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const struct timespec *abstime)
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{
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int64_t abs_milli = abstime->tv_sec * 1000LL + abstime->tv_nsec / 1000000;
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DWORD t = av_clip64(abs_milli - av_gettime() / 1000, 0, UINT32_MAX);
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if (!SleepConditionVariableSRW(cond, mutex, t, 0)) {
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DWORD err = GetLastError();
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if (err == ERROR_TIMEOUT)
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return ETIMEDOUT;
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else
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return EINVAL;
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}
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return 0;
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}
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static inline int pthread_cond_signal(pthread_cond_t *cond)
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{
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WakeConditionVariable(cond);
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return 0;
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}
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static inline int pthread_setcancelstate(int state, int *oldstate)
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{
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return 0;
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}
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#endif /* COMPAT_W32PTHREADS_H */
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