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Diffstat (limited to 'media/ffvpx/compat/w32pthreads.h')
| -rw-r--r-- | media/ffvpx/compat/w32pthreads.h | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/media/ffvpx/compat/w32pthreads.h b/media/ffvpx/compat/w32pthreads.h new file mode 100644 index 0000000000..005d4e4757 --- /dev/null +++ b/media/ffvpx/compat/w32pthreads.h @@ -0,0 +1,197 @@ +/* + * Copyright (C) 2010-2011 x264 project + * + * Authors: Steven Walters <kemuri9@gmail.com> + * Pegasys Inc. <http://www.pegasys-inc.com> + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * w32threads to pthreads wrapper + */ + +#ifndef COMPAT_W32PTHREADS_H +#define COMPAT_W32PTHREADS_H + +/* Build up a pthread-like API using underlying Windows API. Have only static + * methods so as to not conflict with a potentially linked in pthread-win32 + * library. + * As most functions here are used without checking return values, + * only implement return values as necessary. */ + +#include <windows.h> +#include <process.h> +#include <time.h> + +#include "libavutil/attributes.h" +#include "libavutil/common.h" +#include "libavutil/internal.h" +#include "libavutil/mem.h" +#include "libavutil/fftime.h" + +typedef struct pthread_t { + void *handle; + void *(*func)(void* arg); + void *arg; + void *ret; +} pthread_t; + +/* use light weight mutex/condition variable API for Windows Vista and later */ +typedef SRWLOCK pthread_mutex_t; +typedef CONDITION_VARIABLE pthread_cond_t; + +#define PTHREAD_MUTEX_INITIALIZER SRWLOCK_INIT +#define PTHREAD_COND_INITIALIZER CONDITION_VARIABLE_INIT + +#define InitializeCriticalSection(x) InitializeCriticalSectionEx(x, 0, 0) +#define WaitForSingleObject(a, b) WaitForSingleObjectEx(a, b, FALSE) + +#define PTHREAD_CANCEL_ENABLE 1 +#define PTHREAD_CANCEL_DISABLE 0 + +#if HAVE_WINRT +#define THREADFUNC_RETTYPE DWORD +#else +#define THREADFUNC_RETTYPE unsigned +#endif + +static av_unused THREADFUNC_RETTYPE +__stdcall attribute_align_arg win32thread_worker(void *arg) +{ + pthread_t *h = (pthread_t*)arg; + h->ret = h->func(h->arg); + return 0; +} + +static av_unused int pthread_create(pthread_t *thread, const void *unused_attr, + void *(*start_routine)(void*), void *arg) +{ + thread->func = start_routine; + thread->arg = arg; +#if HAVE_WINRT + thread->handle = (void*)CreateThread(NULL, 0, win32thread_worker, thread, + 0, NULL); +#else + thread->handle = (void*)_beginthreadex(NULL, 0, win32thread_worker, thread, + 0, NULL); +#endif + return !thread->handle; +} + +static av_unused int pthread_join(pthread_t thread, void **value_ptr) +{ + DWORD ret = WaitForSingleObject(thread.handle, INFINITE); + if (ret != WAIT_OBJECT_0) { + if (ret == WAIT_ABANDONED) + return EINVAL; + else + return EDEADLK; + } + if (value_ptr) + *value_ptr = thread.ret; + CloseHandle(thread.handle); + return 0; +} + +static inline int pthread_mutex_init(pthread_mutex_t *m, void* attr) +{ + InitializeSRWLock(m); + return 0; +} +static inline int pthread_mutex_destroy(pthread_mutex_t *m) +{ + /* Unlocked SWR locks use no resources */ + return 0; +} +static inline int pthread_mutex_lock(pthread_mutex_t *m) +{ + AcquireSRWLockExclusive(m); + return 0; +} +static inline int pthread_mutex_unlock(pthread_mutex_t *m) +{ + ReleaseSRWLockExclusive(m); + return 0; +} + +typedef INIT_ONCE pthread_once_t; +#define PTHREAD_ONCE_INIT INIT_ONCE_STATIC_INIT + +static av_unused int pthread_once(pthread_once_t *once_control, void (*init_routine)(void)) +{ + BOOL pending = FALSE; + InitOnceBeginInitialize(once_control, 0, &pending, NULL); + if (pending) + init_routine(); + InitOnceComplete(once_control, 0, NULL); + return 0; +} + +static inline int pthread_cond_init(pthread_cond_t *cond, const void *unused_attr) +{ + InitializeConditionVariable(cond); + return 0; +} + +/* native condition variables do not destroy */ +static inline int pthread_cond_destroy(pthread_cond_t *cond) +{ + return 0; +} + +static inline int pthread_cond_broadcast(pthread_cond_t *cond) +{ + WakeAllConditionVariable(cond); + return 0; +} + +static inline int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex) +{ + SleepConditionVariableSRW(cond, mutex, INFINITE, 0); + return 0; +} + +static inline int pthread_cond_timedwait(pthread_cond_t *cond, pthread_mutex_t *mutex, + const struct timespec *abstime) +{ + int64_t abs_milli = abstime->tv_sec * 1000LL + abstime->tv_nsec / 1000000; + DWORD t = av_clip64(abs_milli - av_gettime() / 1000, 0, UINT32_MAX); + + if (!SleepConditionVariableSRW(cond, mutex, t, 0)) { + DWORD err = GetLastError(); + if (err == ERROR_TIMEOUT) + return ETIMEDOUT; + else + return EINVAL; + } + return 0; +} + +static inline int pthread_cond_signal(pthread_cond_t *cond) +{ + WakeConditionVariable(cond); + return 0; +} + +static inline int pthread_setcancelstate(int state, int *oldstate) +{ + return 0; +} + +#endif /* COMPAT_W32PTHREADS_H */ |