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