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#ifndef __PLATFORMSEMAPHORE_H
#define __PLATFORMSEMAPHORE_H
#if SUPPORT_THREADS
#include "Runtime/Utilities/NonCopyable.h"
class PlatformSemaphore : public NonCopyable
{
friend class Semaphore;
protected:
void Create();
void Destroy();
void WaitForSignal();
void Signal();
private:
HANDLE m_Semaphore;
};
inline void PlatformSemaphore::Create()
{
#if UNITY_WINRT
m_Semaphore = CreateSemaphoreExW(NULL, 0, 256, NULL, 0, (STANDARD_RIGHTS_REQUIRED | SEMAPHORE_MODIFY_STATE | SYNCHRONIZE));
#else
m_Semaphore = CreateSemaphoreA( NULL, 0, 256, NULL );
#endif
}
inline void PlatformSemaphore::Destroy(){ if( m_Semaphore ) CloseHandle(m_Semaphore); }
inline void PlatformSemaphore::WaitForSignal()
{
#if UNITY_WINRT // ?!-
WaitForSingleObjectEx(m_Semaphore, INFINITE, FALSE);
#else
while (1)
{
DWORD result = WaitForSingleObjectEx( m_Semaphore, INFINITE, TRUE );
switch (result)
{
case WAIT_OBJECT_0:
// We got the signal
return;
case WAIT_IO_COMPLETION:
// Allow thread to run IO completion task
Sleep(1);
break;
default:
Assert(false);
break;
}
}
#endif
}
inline void PlatformSemaphore::Signal() { ReleaseSemaphore( m_Semaphore, 1, NULL ); }
#endif // SUPPORT_THREADS
#endif // __PLATFORMSEMAPHORE_H
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