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#if defined(__WXMSW__)
#ifndef __equeue_win_h__
#define __equeue_win_h__
#include <windows.h>
#include <list>
template <class T>
class eQueueImpl
{
protected:
CRITICAL_SECTION m_cs;
HANDLE m_event;
std::list<T> m_queue;
public:
eQueueImpl();
virtual ~eQueueImpl();
bool put(const T& item);
bool get(T& item, long timeout);
};
//----------------------------
// Implementation
//----------------------------
template<class T>
eQueueImpl<T>::eQueueImpl()
{
// Create a manual reset event initially signalled.
// This event will be signalled and shall remain so whenever there is data in the queue and
// it shall be reset as long as queue is empty
InitializeCriticalSection(&m_cs);
m_event = CreateEvent(NULL, TRUE, FALSE, NULL);
}
template<class T>
eQueueImpl<T>::~eQueueImpl()
{
DeleteCriticalSection(&m_cs);
CloseHandle(m_event);
m_queue.clear();
}
template<class T>
bool eQueueImpl<T>::get(T& item, long timeout)
{
bool cont ( true );
while (cont) {
DWORD dwRet = WaitForSingleObject(m_event, timeout);
switch (dwRet) {
case WAIT_OBJECT_0:
// we have something on the queue, test it
EnterCriticalSection( &m_cs );
if (m_queue.empty()) {
// probably another thread beat us to this portion of the code
// keep on waiting
cont = true;
LeaveCriticalSection( &m_cs );
break;
} else {
cont = false;
// we got an item from the queue, copy and extract it
item = m_queue.front();
m_queue.pop_front();
// if the queue is empty reset the event to 'non-signaled' state
if (m_queue.empty()) {
ResetEvent(m_event);
}
LeaveCriticalSection( &m_cs );
return true;
}
default:
// timeout or other error occurred here
return false;
}
}
return false;
}
template<class T>
bool eQueueImpl<T>::put(const T& item)
{
EnterCriticalSection( &m_cs );
m_queue.push_back(item);
SetEvent(m_event);
LeaveCriticalSection( &m_cs );
return true;
}
#endif // __equeue_win_h__
#endif
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