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#include <asura-lib-utils/exceptions/exception.h>
#include "mutex.h"
namespace AsuraEngine
{
namespace Threading
{
#define try_create_mutex(impl)\
if (!mImpl) \
{ \
try \
{ \
mImpl = new impl(); \
} \
catch (Exception& e) \
{ \
mImpl = nullptr; \
} \
}
Mutex::Mutex()
: mImpl(nullptr)
{
#if ASURA_MUTEX_WIN32_CRITICLE_SECTION
try_create_mutex(MutexImplWin32_CS);
#endif
#if ASURA_MUTEX_WIN32_KERNAL_MUTEX
try_create_mutex(MutexImplWin32_KM);
#endif
ASSERT(mImpl);
}
Mutex::~Mutex()
{
delete mImpl;
}
void Mutex::Lock()
{
ASSERT(mImpl);
mImpl->Lock();
}
void Mutex::Unlock()
{
ASSERT(mImpl);
mImpl->Unlock();
}
#if ASURA_MUTEX_WIN32_CRITICLE_SECTION
MutexImplWin32_CS::MutexImplWin32_CS()
{
::InitializeCriticalSection(&mMutex);
}
MutexImplWin32_CS::~MutexImplWin32_CS()
{
::DeleteCriticalSection(&mMutex);
}
void MutexImplWin32_CS::Lock()
{
::EnterCriticalSection(&mMutex);
}
void MutexImplWin32_CS::Unlock()
{
::LeaveCriticalSection(&mMutex);
}
#endif // ASURA_MUTEX_WIN32_CRITICLE_SECTION
#if ASURA_MUTEX_WIN32_KERNAL_MUTEX
MutexImplWin32_KM::MutexImplWin32_KM()
{
mHandle = ::CreateMutex(NULL, FALSE, NULL);
if (!mHandle)
throw Exception("Cant use win32 mutex.");
}
MutexImplWin32_KM::~MutexImplWin32_KM()
{
::CloseHandle(mHandle);
mHandle = NULL;
}
void MutexImplWin32_KM::Lock()
{
::WaitForSingleObject(mHandle, INFINITE);
}
void MutexImplWin32_KM::Unlock()
{
::ReleaseMutex(mHandle);
}
#endif // ASURA_MUTEX_WIN32_KERNAL_MUTEX
}
}
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