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random.cpp
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C/C++ Source or Header
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1998-04-02
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3KB
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121 lines
// Random.cpp : Implementation of CConnectApp and DLL registration.
#include "preconn.h"
#include "Connect.h"
#include "Random.h"
/////////////////////////////////////////////////////////////////////////////
//
STDMETHODIMP CRandom::InterfaceSupportsErrorInfo(REFIID riid)
{
if (riid == IID_IRandom)
return S_OK;
return S_FALSE;
}
/////////////////////////////////////////////////////////////////////////////
//
DWORD WINAPI RandomSessionThreadEntry(void* pv)
{
CRandom::RandomSessionData* pS = (CRandom::RandomSessionData*)pv;
CRandom* p = pS->pRandom;
while (WaitForSingleObject(pS->m_hEvent, 0) != WAIT_OBJECT_0)
p->Fire(pS->m_nID);
return 0;
}
CRandom::~CRandom()
{
StopAll();
}
void CRandom::CreateRandomSession(RandomSessionData& rs)
{
DWORD dwThreadID = 0;
_ASSERTE(rs.m_hEvent == NULL);
_ASSERTE(rs.m_hThread == NULL);
rs.pRandom = this;
rs.m_hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
rs.m_hThread = CreateThread(NULL, 0, &RandomSessionThreadEntry, &rs, 0, &dwThreadID);
}
STDMETHODIMP CRandom::get_Start(long* pnID)
{
if (pnID == NULL)
return E_POINTER;
*pnID = 0;
HRESULT hRes = S_OK;
m_cs.Lock();
for (long i=0;i<nMaxSessions;i++)
{
if (m_rsArray[i].m_hEvent == NULL)
{
m_rsArray[i].m_nID = i;
CreateRandomSession(m_rsArray[i]);
*pnID = i;
break;
}
}
if (i == nMaxSessions) //fell through
hRes = E_FAIL;
m_cs.Unlock();
return hRes;
}
STDMETHODIMP CRandom::put_Stop(long nID)
{
HRESULT hRes = S_OK;
m_cs.Lock();
if (m_rsArray[nID].m_hEvent != NULL)
{
SetEvent(m_rsArray[nID].m_hEvent);
WaitForSingleObject(m_rsArray[nID].m_hThread, INFINITE);
CloseHandle(m_rsArray[nID].m_hThread);
memset(&m_rsArray[nID], 0, sizeof(RandomSessionData));
}
else
hRes = E_INVALIDARG;
m_cs.Unlock();
return hRes;
}
STDMETHODIMP CRandom::StopAll()
{
m_cs.Lock();
for (long i=0;i<nMaxSessions;i++)
{
if (m_rsArray[i].m_hEvent != NULL)
{
SetEvent(m_rsArray[i].m_hEvent);
WaitForSingleObject(m_rsArray[i].m_hThread, INFINITE);
CloseHandle(m_rsArray[i].m_hThread);
memset(&m_rsArray[i], 0, sizeof(RandomSessionData));
}
}
m_cs.Unlock();
return S_OK;
}
// broadcast to all the objects
HRESULT CRandom::Fire(long nID)
{
IConnectionPointImpl<CRandom, &IID_IRandomEvent, CComDynamicUnkArray>* p = this;
Lock();
HRESULT hr = S_OK;
IUnknown** pp = p->m_vec.begin();
while (pp < p->m_vec.end() && hr == S_OK)
{
if (*pp != NULL)
{
IRandomEvent* pIRandomEvent = (IRandomEvent*)*pp;
hr = pIRandomEvent->put_Fire(nID);
}
pp++;
}
Unlock();
return hr;
}