2007-12-07 00:26:56 +00:00
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#include "ThreadMsg.h"
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CThreadMsg::CThreadMsg()
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{
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m_nMessage = false;
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#ifdef WIN32
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m_hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
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#endif
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}
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CThreadMsg::~CThreadMsg()
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{
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#ifdef WIN32
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CloseHandle(m_hEvent);
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#endif
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}
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unsigned int CThreadMsg::SendMessage(unsigned int nMsg, void* pParam)
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{
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#ifdef WIN32
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unsigned long nStatus;
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MSG wmmsg;
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m_Msg.nMsg = nMsg;
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m_Msg.pParam = pParam;
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m_Msg.nRetValue = 0;
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m_nMessage = true;
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ResetEvent(m_hEvent);
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while(1)
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{
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nStatus = MsgWaitForMultipleObjects(1, &m_hEvent, FALSE, INFINITE, QS_SENDMESSAGE);
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if(nStatus == WAIT_OBJECT_0) break;
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//Process the message in queue to prevent a possible deadlock
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if(PeekMessage(&wmmsg, NULL, 0, 0, PM_REMOVE))
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{
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TranslateMessage(&wmmsg);
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DispatchMessage(&wmmsg);
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}
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}
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return m_Msg.nRetValue;
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#endif
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return 0;
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}
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bool CThreadMsg::GetMessage(MESSAGE* pMsg)
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{
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#ifdef WIN32
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if(!m_nMessage) return false;
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if(pMsg != NULL)
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{
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pMsg->nMsg = m_Msg.nMsg;
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pMsg->pParam = m_Msg.pParam;
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}
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#endif
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return true;
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}
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void CThreadMsg::FlushMessage(unsigned int nRetValue)
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{
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#ifdef WIN32
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if(!m_nMessage) return;
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m_nMessage = false;
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m_Msg.nRetValue = nRetValue;
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SetEvent(m_hEvent);
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#endif
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}
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bool CThreadMsg::IsMessagePending()
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{
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return m_nMessage;
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}
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