715 lines
19 KiB
C++
715 lines
19 KiB
C++
//+-------------------------------------------------------------------------
|
|
//
|
|
// Microsoft Windows
|
|
//
|
|
// Copyright (C) Microsoft Corporation, 1997 - 1999
|
|
//
|
|
// File: dsthread.cpp
|
|
//
|
|
//--------------------------------------------------------------------------
|
|
|
|
|
|
// FILE: dsThread.cpp
|
|
|
|
#include "stdafx.h"
|
|
|
|
#include "dssnap.h" // Note: this has to be before dsthread.h
|
|
#include "dsthread.h"
|
|
|
|
|
|
#ifdef _DEBUG
|
|
#define new DEBUG_NEW
|
|
#undef THIS_FILE
|
|
static char THIS_FILE[] = __FILE__;
|
|
#endif
|
|
|
|
void WaitForThreadShutdown(HANDLE* phThreadArray, DWORD dwCount)
|
|
{
|
|
TRACE(L"entering WaitForThreadShutdown()\n");
|
|
while (TRUE)
|
|
{
|
|
//
|
|
// NOTE: this will block the console. This the intended behavior
|
|
// to keep MMC from breaking on none re-entrant code.
|
|
//
|
|
DWORD dwWaitResult = WaitForMultipleObjectsEx(
|
|
dwCount,
|
|
phThreadArray, // handle array
|
|
TRUE, // wait for all
|
|
INFINITE, // time-out
|
|
FALSE);// signal completion routine
|
|
//TRACE(L"after MsgWaitForMultipleObjects()\n");
|
|
//TRACE(L"dwWaitResult = 0x%x\n", dwWaitResult);
|
|
if (dwWaitResult == WAIT_OBJECT_0 ||
|
|
(WAIT_FAILED == dwWaitResult))
|
|
{
|
|
// woke up because the thread handle got signalled,
|
|
// or because the handle is no longer valid (thread already terminated)
|
|
// can proceed
|
|
TRACE(L"WaitForMultipleObjectsEx() succeeded\n");
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
TRACE(L"WaitForMultipleObjectsEx() return 0x%x\n", dwWaitResult);
|
|
}
|
|
/* Whistler bug #176012 MMC: Assert m_pScopeTree == 0
|
|
This message pump causes the UI not to be blocked which means
|
|
MMC can reach code that is not re-entrant.
|
|
|
|
else
|
|
{
|
|
// woke up because there is a message in the queue
|
|
// need to pump
|
|
MSG msg;
|
|
while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
|
|
{
|
|
TRACE(L"inside while(PeekMessage())\n");
|
|
ASSERT(msg.message != WM_QUIT);
|
|
DispatchMessage(&msg);
|
|
}
|
|
}*/
|
|
} // while
|
|
|
|
TRACE(L"exiting WaitForThreadShutdown()\n");
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// CHiddenWnd
|
|
|
|
const UINT CHiddenWnd::s_ThreadStartNotificationMessage = WM_USER + 1;
|
|
const UINT CHiddenWnd::s_ThreadTooMuchDataNotificationMessage = WM_USER + 2;
|
|
const UINT CHiddenWnd::s_ThreadHaveDataNotificationMessage = WM_USER + 3;
|
|
const UINT CHiddenWnd::s_ThreadDoneNotificationMessage = WM_USER + 4;
|
|
const UINT CHiddenWnd::s_SheetCloseNotificationMessage = WM_DSA_SHEET_CLOSE_NOTIFY; // propcfg.h
|
|
const UINT CHiddenWnd::s_SheetCreateNotificationMessage = WM_DSA_SHEET_CREATE_NOTIFY; // propcfg.h
|
|
const UINT CHiddenWnd::s_RefreshAllNotificationMessage = WM_USER + 7;
|
|
const UINT CHiddenWnd::s_ThreadShutDownNotificationMessage = WM_USER + 8;
|
|
|
|
BOOL CHiddenWnd::Create()
|
|
{
|
|
RECT rcPos;
|
|
ZeroMemory(&rcPos, sizeof(RECT));
|
|
HWND hWnd = CWindowImpl<CHiddenWnd>::Create( NULL, //HWND hWndParent,
|
|
rcPos, //RECT& rcPos,
|
|
NULL, //LPCTSTR szWindowName = NULL,
|
|
WS_POPUP, //DWORD dwStyle = WS_CHILD | WS_VISIBLE,
|
|
0x0, //DWORD dwExStyle = 0,
|
|
0 //UINT nID = 0
|
|
);
|
|
return hWnd != NULL;
|
|
}
|
|
|
|
|
|
LRESULT CHiddenWnd::OnThreadStartNotification(UINT, WPARAM, LPARAM, BOOL&)
|
|
{
|
|
TRACE(_T("CHiddenWnd::OnThreadStartNotification()\n"));
|
|
ASSERT(m_pCD != NULL);
|
|
|
|
ASSERT(m_pCD->m_pBackgroundThreadInfo->m_state == notStarted);
|
|
ASSERT(m_pCD->m_pBackgroundThreadInfo->m_nThreadID != 0);
|
|
ASSERT(m_pCD->m_pBackgroundThreadInfo->m_hThreadHandle != NULL);
|
|
|
|
m_pCD->m_pBackgroundThreadInfo->m_state = running;
|
|
|
|
return 1;
|
|
}
|
|
|
|
LRESULT CHiddenWnd::OnThreadShutDownNotification(UINT, WPARAM, LPARAM, BOOL&)
|
|
{
|
|
TRACE(_T("CHiddenWnd::OnThreadShutDownNotification()\n"));
|
|
ASSERT(m_pCD != NULL);
|
|
|
|
ASSERT(m_pCD->m_pBackgroundThreadInfo->m_state == shuttingDown);
|
|
m_pCD->m_pBackgroundThreadInfo->m_state = terminated;
|
|
|
|
return 1;
|
|
}
|
|
|
|
LRESULT CHiddenWnd::OnThreadTooMuchDataNotification(UINT, WPARAM wParam, LPARAM, BOOL&)
|
|
{
|
|
TRACE(_T("CHiddenWnd::OnThreadTooMuchDataNotification()\n"));
|
|
ASSERT(m_pCD != NULL);
|
|
|
|
// ingnore if we are shutting down (i.e. not running state)
|
|
if (m_pCD->m_pBackgroundThreadInfo->m_state == running)
|
|
{
|
|
CUINode* pUINode = reinterpret_cast<CUINode*>(wParam);
|
|
m_pCD->_OnTooMuchData(pUINode);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
LRESULT CHiddenWnd::OnThreadHaveDataNotification(UINT, WPARAM wParam, LPARAM lParam, BOOL&)
|
|
{
|
|
TRACE(_T("CHiddenWnd::OnThreadHaveDataNotification()\n"));
|
|
ASSERT(m_pCD != NULL);
|
|
|
|
CUINode* pUINode = reinterpret_cast<CUINode*>(wParam);
|
|
CThreadQueryResult* pResult = reinterpret_cast<CThreadQueryResult*>(lParam);
|
|
|
|
// ingnore if we are shutting down (i.e. not running state)
|
|
if (m_pCD->m_pBackgroundThreadInfo->m_state == running)
|
|
{
|
|
m_pCD->_OnHaveData(pUINode, pResult);
|
|
}
|
|
else
|
|
{
|
|
// going down, eat up data
|
|
if (pResult != NULL)
|
|
delete pResult;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
LRESULT CHiddenWnd::OnThreadDoneNotification(UINT, WPARAM wParam, LPARAM lParam, BOOL&)
|
|
{
|
|
HRESULT ReturnedHr = (HRESULT)lParam;
|
|
ASSERT(m_pCD != NULL);
|
|
|
|
// ingnore if we are shutting down (i.e. not running state)
|
|
if (m_pCD->m_pBackgroundThreadInfo->m_state == running)
|
|
{
|
|
CUINode* pUINode = reinterpret_cast<CUINode*>(wParam);
|
|
m_pCD->_OnDone(pUINode, ReturnedHr);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
LRESULT CHiddenWnd::OnSheetCloseNotification(UINT, WPARAM wParam, LPARAM, BOOL&)
|
|
{
|
|
ASSERT(m_pCD != NULL);
|
|
CUINode* pUINode = reinterpret_cast<CUINode*>(wParam);
|
|
m_pCD->_OnSheetClose(pUINode);
|
|
return 1;
|
|
}
|
|
|
|
LRESULT CHiddenWnd::OnSheetCreateNotification(UINT, WPARAM wParam, LPARAM, BOOL&)
|
|
{
|
|
ASSERT(m_pCD != NULL);
|
|
PDSA_SEC_PAGE_INFO pDsaSecondaryPageInfo = reinterpret_cast<PDSA_SEC_PAGE_INFO>(wParam);
|
|
ASSERT(pDsaSecondaryPageInfo != NULL);
|
|
|
|
// ingnore if we are shutting down (i.e. not running state)
|
|
if (m_pCD->m_pBackgroundThreadInfo->m_state == running)
|
|
{
|
|
m_pCD->_OnSheetCreate(pDsaSecondaryPageInfo);
|
|
}
|
|
|
|
::LocalFree(pDsaSecondaryPageInfo);
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
LRESULT CHiddenWnd::OnRefreshAllNotification(UINT, WPARAM, LPARAM, BOOL&)
|
|
{
|
|
ASSERT(m_pCD != NULL);
|
|
// ingnore if we are shutting down (i.e. not running state)
|
|
if (m_pCD->m_pBackgroundThreadInfo->m_state == running)
|
|
{
|
|
m_pCD->ForceRefreshAll();
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// CBackgroundThreadBase
|
|
|
|
CBackgroundThreadBase::CBackgroundThreadBase()
|
|
{
|
|
m_bAutoDelete = TRUE;
|
|
m_hWnd = NULL;
|
|
m_pCD = NULL;
|
|
}
|
|
|
|
CBackgroundThreadBase::~CBackgroundThreadBase()
|
|
{
|
|
}
|
|
|
|
|
|
BOOL CBackgroundThreadBase::Start(HWND hWnd, CDSComponentData* pCD)
|
|
{
|
|
// this function executes in the context of the parent thread
|
|
AFX_MANAGE_STATE(AfxGetStaticModuleState());
|
|
|
|
ASSERT(::IsWindow(hWnd));
|
|
m_hWnd = hWnd;
|
|
m_pCD = pCD;
|
|
|
|
return CreateThread();
|
|
}
|
|
|
|
BOOL CBackgroundThreadBase::InitInstance()
|
|
{
|
|
// this function executes in the context of the child thread
|
|
|
|
HRESULT hr = ::CoInitialize(NULL);
|
|
if (FAILED(hr))
|
|
return FALSE;
|
|
|
|
return SUCCEEDED(hr);
|
|
}
|
|
|
|
int CBackgroundThreadBase::ExitInstance()
|
|
{
|
|
::CoUninitialize();
|
|
|
|
PostExitNotification();
|
|
|
|
// Sleep(1000);
|
|
return CWinThread::ExitInstance();
|
|
}
|
|
|
|
|
|
BOOL CBackgroundThreadBase::PostMessageToWnd(UINT msg, WPARAM wParam, LPARAM lParam)
|
|
{
|
|
ASSERT(::IsWindow(m_hWnd));
|
|
return ::PostMessage(m_hWnd, msg, wParam, lParam);
|
|
}
|
|
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// CDispatcherThread
|
|
|
|
#define WORKER_THREAD_COUNT 2
|
|
|
|
CDispatcherThread::CDispatcherThread()
|
|
{
|
|
m_nArrCount = WORKER_THREAD_COUNT;
|
|
m_pThreadInfoArr = (CBackgroundThreadInfo*)malloc(m_nArrCount*sizeof(CBackgroundThreadInfo));
|
|
if (m_pThreadInfoArr != NULL)
|
|
{
|
|
ZeroMemory(m_pThreadInfoArr, m_nArrCount*sizeof(CBackgroundThreadInfo));
|
|
}
|
|
}
|
|
|
|
|
|
CDispatcherThread::~CDispatcherThread()
|
|
{
|
|
free(m_pThreadInfoArr);
|
|
}
|
|
|
|
int CDispatcherThread::Run()
|
|
{
|
|
TRACE(_T("CDispatcherThread::Run() starting\n"));
|
|
|
|
BOOL bShuttingDown = FALSE;
|
|
MSG msg;
|
|
// initialize the message pump
|
|
::PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE);
|
|
|
|
// get let the main thread know we are entering the loop
|
|
PostMessageToWnd(CHiddenWnd::s_ThreadStartNotificationMessage,0,0);
|
|
|
|
BOOL bQuit = FALSE;
|
|
while(!bQuit && ::GetMessage(&msg, NULL, 0, 0))
|
|
{
|
|
switch(msg.message)
|
|
{
|
|
case DISPATCH_THREAD_RUN_MSG:
|
|
{
|
|
if (bShuttingDown)
|
|
{
|
|
// going down, eat up the message
|
|
CDSThreadQueryInfo* pQueryInfo = reinterpret_cast<CDSThreadQueryInfo*>(msg.lParam);
|
|
|
|
// reclaim memory in the queue
|
|
delete pQueryInfo;
|
|
}
|
|
else
|
|
{
|
|
// get a thread from the thread pool
|
|
UINT nEntry = GetThreadEntryFromPool();
|
|
ASSERT(m_pThreadInfoArr[nEntry].m_nThreadID != 0);
|
|
ASSERT(m_pThreadInfoArr[nEntry].m_state == running);
|
|
|
|
// forward the processing request to the thread from the pool
|
|
::PostThreadMessage(m_pThreadInfoArr[nEntry].m_nThreadID,
|
|
DISPATCH_THREAD_RUN_MSG, msg.wParam, msg.lParam);
|
|
|
|
// move the thread to a busy state
|
|
m_pThreadInfoArr[nEntry].m_state = busy;
|
|
}
|
|
}
|
|
break;
|
|
case DISPATCH_THREAD_DONE_MSG:
|
|
{
|
|
UINT nThreadID = (UINT)(msg.wParam);
|
|
ReturnThreadToPool(nThreadID);
|
|
}
|
|
break;
|
|
case THREAD_SHUTDOWN_MSG:
|
|
{
|
|
TRACE(L"CDispatcherThread got THREAD_SHUTDOWN_MSG\n");
|
|
|
|
ASSERT(!bShuttingDown);
|
|
|
|
// asked to shut down
|
|
bShuttingDown = TRUE;
|
|
// if no threads running, we go down immediately
|
|
// otherwise we have to wait for them to terminate
|
|
bQuit = BroadcastShutDownAllThreads();
|
|
|
|
TRACE(L"BroadcastShutDownAllThreads() returned bQuit = %d\n", bQuit);
|
|
}
|
|
break;
|
|
case THREAD_SHUTDOWN_ACK_MSG:
|
|
{
|
|
TRACE(L"CDispatcherThread got THREAD_SHUTDOWN_ACK_MSG\n");
|
|
|
|
ASSERT(bShuttingDown);
|
|
|
|
// worker thread has gone down
|
|
UINT nThreadID = (UINT)(msg.wParam);
|
|
bQuit = MarkThreadAsTerminated(nThreadID);
|
|
TRACE(L"MarkThreadAsTerminated() returned bQuit = %d\n", bQuit);
|
|
}
|
|
break;
|
|
default:
|
|
{
|
|
// unknown message, just let it through
|
|
::DispatchMessage(&msg);
|
|
} // default
|
|
} //switch
|
|
} // while
|
|
|
|
ASSERT(bShuttingDown);
|
|
|
|
// wait now for all the thread handles to become signalled
|
|
WaitForAllWorkerThreadsToExit();
|
|
|
|
TRACE(_T("CDispatcherThread::Run() is terminating\n"));
|
|
|
|
return ExitInstance();
|
|
}
|
|
|
|
void CDispatcherThread::PostExitNotification()
|
|
{
|
|
// we are finally done shutting down, let the main thread know
|
|
// that we are going down
|
|
PostMessageToWnd(CHiddenWnd::s_ThreadShutDownNotificationMessage, 0, 0);
|
|
TRACE(_T("CDispatcherThread::PostExitNotification() posted thread shutdown notification\n"));
|
|
|
|
}
|
|
|
|
|
|
UINT CDispatcherThread::_GetEntryFromArray()
|
|
{
|
|
UINT nFreeSlot = m_nArrCount; // set as "not found"
|
|
for (UINT k=0; k<m_nArrCount; k++)
|
|
{
|
|
if ( (m_pThreadInfoArr[k].m_nThreadID == 0) && (nFreeSlot == m_nArrCount))
|
|
nFreeSlot = k; // remember the first free slot
|
|
if ((m_pThreadInfoArr[k].m_nThreadID != 0) && (m_pThreadInfoArr[k].m_state == running))
|
|
return k; // found an idle running thread
|
|
}
|
|
// not found any idle thread, return an empty slot
|
|
if (nFreeSlot == m_nArrCount)
|
|
{
|
|
// no free space anymore, need to reallocate array
|
|
int nAlloc = m_nArrCount*2;
|
|
m_pThreadInfoArr = (CBackgroundThreadInfo*)realloc(m_pThreadInfoArr, sizeof(CBackgroundThreadInfo)*nAlloc);
|
|
::ZeroMemory(&m_pThreadInfoArr[m_nArrCount], sizeof(CBackgroundThreadInfo)*m_nArrCount);
|
|
nFreeSlot = m_nArrCount; // first free in new block
|
|
m_nArrCount = nAlloc;
|
|
}
|
|
return nFreeSlot;
|
|
}
|
|
|
|
UINT CDispatcherThread::GetThreadEntryFromPool()
|
|
{
|
|
UINT nEntry = _GetEntryFromArray();
|
|
|
|
// if the entry is empty, need to
|
|
// spawn a thread and wait it is running
|
|
if (m_pThreadInfoArr[nEntry].m_nThreadID == 0)
|
|
{
|
|
// create the thread
|
|
CWorkerThread* pThreadObj = new CWorkerThread(m_nThreadID);
|
|
ASSERT(pThreadObj != NULL);
|
|
if (pThreadObj == NULL)
|
|
return 0;
|
|
|
|
// start the the thread
|
|
ASSERT(m_pThreadInfoArr[nEntry].m_hThreadHandle == NULL);
|
|
ASSERT(m_pThreadInfoArr[nEntry].m_state == notStarted);
|
|
|
|
ASSERT(pThreadObj->m_bAutoDelete);
|
|
|
|
if (!pThreadObj->Start(GetHiddenWnd(),GetCD()))
|
|
return 0;
|
|
|
|
|
|
ASSERT(pThreadObj->m_nThreadID != 0);
|
|
ASSERT(pThreadObj->m_hThread != NULL);
|
|
|
|
// copy the thread info we need from the thread object
|
|
m_pThreadInfoArr[nEntry].m_hThreadHandle = pThreadObj->m_hThread;
|
|
m_pThreadInfoArr[nEntry].m_nThreadID = pThreadObj->m_nThreadID;
|
|
|
|
// wait for the thread to start
|
|
MSG msg;
|
|
while(TRUE)
|
|
{
|
|
if (::PeekMessage(&msg,(HWND)-1,WORKER_THREAD_START_MSG, WORKER_THREAD_START_MSG,
|
|
PM_REMOVE))
|
|
{
|
|
TRACE(_T("CDispatcherThread::GetThreadFromPool() got WORKER_THREAD_START_MSG\n"));
|
|
m_pThreadInfoArr[nEntry].m_state = running;
|
|
break;
|
|
}
|
|
} // while
|
|
|
|
} // if
|
|
|
|
ASSERT(m_pThreadInfoArr[nEntry].m_state == running);
|
|
ASSERT(m_pThreadInfoArr[nEntry].m_nThreadID != 0);
|
|
|
|
return nEntry;
|
|
}
|
|
|
|
void CDispatcherThread::ReturnThreadToPool(UINT nThreadID)
|
|
{
|
|
ASSERT(nThreadID != 0);
|
|
for (UINT k=0; k<m_nArrCount; k++)
|
|
{
|
|
if (m_pThreadInfoArr[k].m_nThreadID == nThreadID)
|
|
{
|
|
// return the thread to a busy state
|
|
m_pThreadInfoArr[k].m_state = running;
|
|
return;
|
|
}
|
|
}
|
|
ASSERT(FALSE); // should never get here
|
|
}
|
|
|
|
BOOL CDispatcherThread::BroadcastShutDownAllThreads()
|
|
{
|
|
BOOL bQuit = TRUE;
|
|
for (UINT k=0; k<m_nArrCount; k++)
|
|
{
|
|
if (m_pThreadInfoArr[k].m_nThreadID != 0)
|
|
{
|
|
::PostThreadMessage(m_pThreadInfoArr[k].m_nThreadID, THREAD_SHUTDOWN_MSG,0,0);
|
|
bQuit = FALSE;
|
|
}
|
|
}
|
|
TRACE(L"CDispatcherThread::BroadcastShutDownAllThreads() returning %d\n", bQuit);
|
|
return bQuit;
|
|
}
|
|
|
|
|
|
BOOL CDispatcherThread::MarkThreadAsTerminated(UINT nThreadID)
|
|
{
|
|
TRACE(L"CDispatcherThread::MarkThreadAsTerminated()\n");
|
|
|
|
ASSERT(nThreadID != 0);
|
|
for (UINT k=0; k<m_nArrCount; k++)
|
|
{
|
|
if (m_pThreadInfoArr[k].m_nThreadID == nThreadID)
|
|
{
|
|
// mark the thread as done
|
|
TRACE(L"marking thread k = %d as terminated\n", k);
|
|
ASSERT(m_pThreadInfoArr[k].m_state == running);
|
|
m_pThreadInfoArr[k].m_state = terminated;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// check if all the threads are terminated
|
|
for (k=0; k<m_nArrCount; k++)
|
|
{
|
|
if ((m_pThreadInfoArr[k].m_nThreadID != 0) &&
|
|
(m_pThreadInfoArr[k].m_state != terminated))
|
|
{
|
|
// at least one thread is still running
|
|
return FALSE;
|
|
}
|
|
}
|
|
// all the threads are gone (terminated state)
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
void CDispatcherThread::WaitForAllWorkerThreadsToExit()
|
|
{
|
|
TRACE(L"CDispatcherThread::WaitForAllWorkerThreadsToExit()\n");
|
|
|
|
// wait for the dispatcher thread handle to become signalled
|
|
|
|
DWORD nCount = 0;
|
|
|
|
HANDLE* pHandles = new HANDLE[m_nArrCount];
|
|
if (!pHandles)
|
|
{
|
|
TRACE(L"Failed to allocate space for the handles\n");
|
|
return;
|
|
}
|
|
|
|
::ZeroMemory(pHandles, sizeof(HANDLE)*m_nArrCount);
|
|
|
|
for (UINT k=0; k<m_nArrCount; k++)
|
|
{
|
|
if (m_pThreadInfoArr[k].m_nThreadID != 0)
|
|
{
|
|
TRACE(L"m_pThreadInfoArr[%d].m_state = %d\n", k, m_pThreadInfoArr[k].m_state);
|
|
|
|
ASSERT(m_pThreadInfoArr[k].m_state == terminated);
|
|
ASSERT(m_pThreadInfoArr[k].m_hThreadHandle != NULL);
|
|
pHandles[nCount++] = m_pThreadInfoArr[k].m_hThreadHandle;
|
|
}
|
|
}
|
|
|
|
if (nCount == 0)
|
|
{
|
|
TRACE(L"WARNING: no worker threads to wait for!!!\n");
|
|
return;
|
|
}
|
|
|
|
TRACE(L"before WaitForThreadShutdown() loop on %d worker threads\n", nCount);
|
|
|
|
WaitForThreadShutdown(pHandles, nCount);
|
|
|
|
TRACE(L"after WaitForThreadShutdown() loop on worker threads\n");
|
|
|
|
|
|
#if (FALSE)
|
|
|
|
TRACE(L"before WaitForMultipleObjects() on worker threads\n");
|
|
|
|
WaitForMultipleObjects(nCount, pHandles, TRUE /*fWaitAll*/, INFINITE);
|
|
|
|
TRACE(L"after WaitForMultipleObjects() on worker threads\n");
|
|
#endif
|
|
|
|
delete[] pHandles;
|
|
pHandles = 0;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// CWorkerThread
|
|
|
|
CWorkerThread::CWorkerThread(UINT nParentThreadID)
|
|
: m_nMaxQueueLength(49)
|
|
{
|
|
ASSERT(nParentThreadID != 0);
|
|
m_nParentThreadID = nParentThreadID;
|
|
m_bQuit = FALSE;
|
|
|
|
m_pCurrentQueryResult = NULL;
|
|
m_currWParamCookie = 0;
|
|
}
|
|
|
|
CWorkerThread::~CWorkerThread()
|
|
{
|
|
ASSERT(m_pCurrentQueryResult == NULL);
|
|
|
|
}
|
|
|
|
int CWorkerThread::Run()
|
|
{
|
|
HRESULT hr = S_OK;
|
|
TRACE(_T("CWorkerThread::Run() starting\n"));
|
|
MSG msg;
|
|
// initialize the message pump
|
|
::PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE);
|
|
|
|
// get let the main thread know we are entering the loop
|
|
::PostThreadMessage(m_nParentThreadID, WORKER_THREAD_START_MSG, 0,0);
|
|
|
|
ASSERT(m_bQuit == FALSE);
|
|
|
|
while(!m_bQuit && ::GetMessage(&msg, NULL, 0, 0))
|
|
{
|
|
if(msg.message == DISPATCH_THREAD_RUN_MSG)
|
|
{
|
|
m_currWParamCookie = msg.wParam;
|
|
//::MessageBox(NULL, _T("Wait"), _T("Thread"), MB_OK);
|
|
CThreadQueryInfo* pQueryInfo = reinterpret_cast<CThreadQueryInfo*>(msg.lParam);
|
|
hr = GetCD()->QueryFromWorkerThread(pQueryInfo, this);
|
|
|
|
// make sure we flush the result set
|
|
SendCurrentQueryResult();
|
|
|
|
// if we had to many items, let the hidden window know
|
|
if (pQueryInfo->m_bTooMuchData)
|
|
{
|
|
PostMessageToWnd(CHiddenWnd::s_ThreadTooMuchDataNotificationMessage,
|
|
m_currWParamCookie, (LPARAM)0);
|
|
}
|
|
delete pQueryInfo; // not needed anymore
|
|
|
|
// tell the hidden window we are done
|
|
PostMessageToWnd(CHiddenWnd::s_ThreadDoneNotificationMessage,
|
|
m_currWParamCookie, (LPARAM)hr);
|
|
// tell the dispatcher thread we are done processing
|
|
::PostThreadMessage(m_nParentThreadID, DISPATCH_THREAD_DONE_MSG, m_nThreadID,0);
|
|
m_currWParamCookie = 0; // reset
|
|
}
|
|
else if (msg.message == THREAD_SHUTDOWN_MSG)
|
|
{
|
|
TRACE(_T("CWorkerThread::Run() got THREAD_SHUTDOWN_MSG\n"));
|
|
m_bQuit = TRUE;
|
|
}
|
|
else
|
|
{
|
|
// unknown message, just let it through
|
|
::DispatchMessage(&msg);
|
|
}
|
|
} // while
|
|
|
|
TRACE(_T("CWorkerThread::Run() is terminating\n"));
|
|
return ExitInstance();
|
|
}
|
|
|
|
void CWorkerThread::PostExitNotification()
|
|
{
|
|
// we are finally done shutting down, let the main thread know
|
|
// that we are going down
|
|
::PostThreadMessage(m_nParentThreadID, THREAD_SHUTDOWN_ACK_MSG, m_nThreadID,0);
|
|
TRACE(_T("CWorkerThread::PostExitNotification() posted THREAD_SHUTDOWN_ACK_MSG, m_nThreadID = 0x%x\n"),
|
|
m_nThreadID);
|
|
}
|
|
|
|
void CWorkerThread::AddToQueryResult(CUINode* pUINode)
|
|
{
|
|
ASSERT(!m_bQuit);
|
|
|
|
if (m_pCurrentQueryResult == NULL)
|
|
{
|
|
m_pCurrentQueryResult = new CThreadQueryResult;
|
|
}
|
|
ASSERT(m_pCurrentQueryResult != NULL);
|
|
m_pCurrentQueryResult->m_nodeList.AddTail(pUINode);
|
|
if (m_pCurrentQueryResult->m_nodeList.GetCount() > m_nMaxQueueLength)
|
|
SendCurrentQueryResult();
|
|
|
|
|
|
// check to see if we are forced to abort
|
|
MSG msg;
|
|
if (::PeekMessage(&msg,(HWND)-1,THREAD_SHUTDOWN_MSG, THREAD_SHUTDOWN_MSG,
|
|
PM_REMOVE))
|
|
{
|
|
TRACE(_T("CWorkerThread::AddToQueryResult() got THREAD_SHUTDOWN_MSG\n"));
|
|
m_bQuit = TRUE;
|
|
}
|
|
|
|
}
|
|
|
|
void CWorkerThread::SendCurrentQueryResult()
|
|
{
|
|
if(m_pCurrentQueryResult != NULL)
|
|
{
|
|
// wParam has the cookie, that we just ship back
|
|
PostMessageToWnd(CHiddenWnd::s_ThreadHaveDataNotificationMessage,
|
|
m_currWParamCookie, reinterpret_cast<LPARAM>(m_pCurrentQueryResult));
|
|
m_pCurrentQueryResult = NULL;
|
|
}
|
|
}
|