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/*
* This file is part of libplacebo.
*
* libplacebo 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.
*
* libplacebo 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 libplacebo. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <windows.h>
#include <process.h>
#include <stdint.h>
#include <errno.h>
#include <pl_assert.h>
typedef CRITICAL_SECTION pl_mutex;
typedef CONDITION_VARIABLE pl_cond;
static inline int pl_mutex_init_type_internal(pl_mutex *mutex, enum pl_mutex_type mtype)
{
(void) mtype;
return !InitializeCriticalSectionEx(mutex, 0, 0);
}
#define pl_mutex_init_type(mutex, mtype) \
pl_assert(!pl_mutex_init_type_internal(mutex, mtype))
static inline int pl_mutex_destroy(pl_mutex *mutex)
{
DeleteCriticalSection(mutex);
return 0;
}
static inline int pl_mutex_lock(pl_mutex *mutex)
{
EnterCriticalSection(mutex);
return 0;
}
static inline int pl_mutex_unlock(pl_mutex *mutex)
{
LeaveCriticalSection(mutex);
return 0;
}
static inline int pl_cond_init(pl_cond *cond)
{
InitializeConditionVariable(cond);
return 0;
}
static inline int pl_cond_destroy(pl_cond *cond)
{
// condition variables are not destroyed
(void) cond;
return 0;
}
static inline int pl_cond_broadcast(pl_cond *cond)
{
WakeAllConditionVariable(cond);
return 0;
}
static inline int pl_cond_signal(pl_cond *cond)
{
WakeConditionVariable(cond);
return 0;
}
static inline int pl_cond_wait(pl_cond *cond, pl_mutex *mutex)
{
return !SleepConditionVariableCS(cond, mutex, INFINITE);
}
static inline int pl_cond_timedwait(pl_cond *cond, pl_mutex *mutex, uint64_t timeout)
{
if (timeout == UINT64_MAX)
return pl_cond_wait(cond, mutex);
timeout /= UINT64_C(1000000);
if (timeout > INFINITE - 1)
timeout = INFINITE - 1;
BOOL bRet = SleepConditionVariableCS(cond, mutex, timeout);
if (bRet == FALSE)
{
if (GetLastError() == ERROR_TIMEOUT)
return ETIMEDOUT;
else
return EINVAL;
}
return 0;
}
typedef SRWLOCK pl_static_mutex;
#define PL_STATIC_MUTEX_INITIALIZER SRWLOCK_INIT
static inline int pl_static_mutex_lock(pl_static_mutex *mutex)
{
AcquireSRWLockExclusive(mutex);
return 0;
}
static inline int pl_static_mutex_unlock(pl_static_mutex *mutex)
{
ReleaseSRWLockExclusive(mutex);
return 0;
}
typedef HANDLE pl_thread;
#define PL_THREAD_VOID unsigned __stdcall
#define PL_THREAD_RETURN() return 0
static inline int pl_thread_create(pl_thread *thread,
PL_THREAD_VOID (*fun)(void *),
void *__restrict arg)
{
*thread = (HANDLE) _beginthreadex(NULL, 0, fun, arg, 0, NULL);
return *thread ? 0 : -1;
}
static inline int pl_thread_join(pl_thread thread)
{
DWORD ret = WaitForSingleObject(thread, INFINITE);
if (ret != WAIT_OBJECT_0)
return ret == WAIT_ABANDONED ? EINVAL : EDEADLK;
CloseHandle(thread);
return 0;
}
static inline bool pl_thread_sleep(double t)
{
// Time is expected in 100 nanosecond intervals.
// Negative values indicate relative time.
LARGE_INTEGER time = { .QuadPart = -(LONGLONG) (t * 1e7) };
if (time.QuadPart >= 0)
return true;
bool ret = false;
#ifndef CREATE_WAITABLE_TIMER_HIGH_RESOLUTION
# define CREATE_WAITABLE_TIMER_HIGH_RESOLUTION 0x2
#endif
HANDLE timer = CreateWaitableTimerEx(NULL, NULL,
CREATE_WAITABLE_TIMER_HIGH_RESOLUTION,
TIMER_ALL_ACCESS);
// CREATE_WAITABLE_TIMER_HIGH_RESOLUTION is supported in Windows 10 1803+,
// retry without it.
if (!timer)
timer = CreateWaitableTimerEx(NULL, NULL, 0, TIMER_ALL_ACCESS);
if (!timer)
goto end;
if (!SetWaitableTimer(timer, &time, 0, NULL, NULL, 0))
goto end;
if (WaitForSingleObject(timer, INFINITE) != WAIT_OBJECT_0)
goto end;
ret = true;
end:
if (timer)
CloseHandle(timer);
return ret;
}
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