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/*
* This file is part of mpv.
*
* mpv 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.
*
* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <errno.h>
#include <process.h>
#include <windows.h>
#include "common/common.h"
#include "timer.h"
typedef struct {
char use_cs;
union {
CRITICAL_SECTION cs;
SRWLOCK srw;
};
} mp_mutex;
typedef CONDITION_VARIABLE mp_cond;
typedef INIT_ONCE mp_once;
typedef mp_mutex mp_static_mutex;
typedef HANDLE mp_thread;
typedef DWORD mp_thread_id;
#define MP_STATIC_COND_INITIALIZER CONDITION_VARIABLE_INIT
#define MP_STATIC_MUTEX_INITIALIZER { .srw = SRWLOCK_INIT }
#define MP_STATIC_ONCE_INITIALIZER INIT_ONCE_STATIC_INIT
static inline int mp_mutex_init_type_internal(mp_mutex *mutex, enum mp_mutex_type mtype)
{
mutex->use_cs = mtype == MP_MUTEX_RECURSIVE;
if (mutex->use_cs)
return !InitializeCriticalSectionEx(&mutex->cs, 0, 0);
InitializeSRWLock(&mutex->srw);
return 0;
}
static inline int mp_mutex_destroy(mp_mutex *mutex)
{
if (mutex->use_cs)
DeleteCriticalSection(&mutex->cs);
return 0;
}
static inline int mp_mutex_lock(mp_mutex *mutex)
{
if (mutex->use_cs) {
EnterCriticalSection(&mutex->cs);
} else {
AcquireSRWLockExclusive(&mutex->srw);
}
return 0;
}
static inline int mp_mutex_trylock(mp_mutex *mutex)
{
if (mutex->use_cs)
return !TryEnterCriticalSection(&mutex->cs);
return !TryAcquireSRWLockExclusive(&mutex->srw);
}
static inline int mp_mutex_unlock(mp_mutex *mutex)
{
if (mutex->use_cs) {
LeaveCriticalSection(&mutex->cs);
} else {
ReleaseSRWLockExclusive(&mutex->srw);
}
return 0;
}
static inline int mp_cond_init(mp_cond *cond)
{
InitializeConditionVariable(cond);
return 0;
}
static inline int mp_cond_destroy(mp_cond *cond)
{
// condition variables are not destroyed
(void) cond;
return 0;
}
static inline int mp_cond_broadcast(mp_cond *cond)
{
WakeAllConditionVariable(cond);
return 0;
}
static inline int mp_cond_signal(mp_cond *cond)
{
WakeConditionVariable(cond);
return 0;
}
static inline int mp_cond_timedwait(mp_cond *cond, mp_mutex *mutex, int64_t timeout)
{
timeout = MPCLAMP(timeout, 0, MP_TIME_MS_TO_NS(INFINITE)) / MP_TIME_MS_TO_NS(1);
int ret = 0;
int64_t hrt = mp_start_hires_timers(MP_TIME_MS_TO_NS(timeout));
BOOL bRet;
if (mutex->use_cs) {
bRet = SleepConditionVariableCS(cond, &mutex->cs, timeout);
} else {
bRet = SleepConditionVariableSRW(cond, &mutex->srw, timeout, 0);
}
if (bRet == FALSE)
ret = GetLastError() == ERROR_TIMEOUT ? ETIMEDOUT : EINVAL;
mp_end_hires_timers(hrt);
return ret;
}
static inline int mp_cond_wait(mp_cond *cond, mp_mutex *mutex)
{
return mp_cond_timedwait(cond, mutex, MP_TIME_MS_TO_NS(INFINITE));
}
static inline int mp_cond_timedwait_until(mp_cond *cond, mp_mutex *mutex, int64_t until)
{
return mp_cond_timedwait(cond, mutex, until - mp_time_ns());
}
static inline int mp_exec_once(mp_once *once, void (*init_routine)(void))
{
BOOL pending;
if (!InitOnceBeginInitialize(once, 0, &pending, NULL))
abort();
if (pending) {
init_routine();
InitOnceComplete(once, 0, NULL);
}
return 0;
}
#define MP_THREAD_VOID unsigned __stdcall
#define MP_THREAD_RETURN() return 0
static inline int mp_thread_create(mp_thread *thread,
MP_THREAD_VOID (*fun)(void *),
void *__restrict arg)
{
*thread = (HANDLE) _beginthreadex(NULL, 0, fun, arg, 0, NULL);
return *thread ? 0 : -1;
}
static inline int mp_thread_join(mp_thread thread)
{
DWORD ret = WaitForSingleObject(thread, INFINITE);
if (ret != WAIT_OBJECT_0)
return ret == WAIT_ABANDONED ? EINVAL : EDEADLK;
CloseHandle(thread);
return 0;
}
static inline int mp_thread_join_id(mp_thread_id id)
{
mp_thread thread = OpenThread(SYNCHRONIZE, FALSE, id);
if (!thread)
return ESRCH;
int ret = mp_thread_join(thread);
if (ret)
CloseHandle(thread);
return ret;
}
static inline int mp_thread_detach(mp_thread thread)
{
return CloseHandle(thread) ? 0 : EINVAL;
}
#define mp_thread_current_id GetCurrentThreadId
#define mp_thread_id_equal(a, b) ((a) == (b))
#define mp_thread_get_id(thread) GetThreadId(thread)
// declared in io.h, which we don't want to pull in everywhere
wchar_t *mp_from_utf8(void *talloc_ctx, const char *s);
static inline void mp_thread_set_name(const char *name)
{
HRESULT (WINAPI *pSetThreadDescription)(HANDLE, PCWSTR);
#if !HAVE_UWP
HMODULE kernel32 = GetModuleHandleW(L"kernel32.dll");
if (!kernel32)
return;
pSetThreadDescription = (void *) GetProcAddress(kernel32, "SetThreadDescription");
if (!pSetThreadDescription)
return;
#else
WINBASEAPI HRESULT WINAPI
SetThreadDescription(HANDLE hThread, PCWSTR lpThreadDescription);
pSetThreadDescription = &SetThreadDescription;
#endif
wchar_t *wname = mp_from_utf8(NULL, name);
pSetThreadDescription(GetCurrentThread(), wname);
talloc_free(wname);
}
static inline int64_t mp_thread_cpu_time_ns(mp_thread_id thread)
{
(void) thread;
return 0;
}
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