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class ConcurrentExecution
{
< private members omitted>
public:
ConcurrentExecution(int iMaxNumberOfThreads);
~ConcurrentExecution();
int DoForAllObjects(int iNoOfObjects,long *ObjectArray,
CONCURRENT_EXECUTION_ROUTINE pObjectProcessor,
CONCURRENT_FINISHING_ROUTINE pObjectTerminated);
BOOL DoSerial(int iNoOfObjects, long *ObjectArray,
CONCURRENT_EXECUTION_ROUTINE pObjectProcessor,
CONCURRENT_FINISHING_ROUTINE pObjectTerminated);
};

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ConcurrentExecution::ConcurrentExecution(int iMaxNumber!
OfThread
s)
{
m_iMaxArraySize = min(iMaxNumberOfThreads, MAXIMUM_WAIT_OBJECTS);
m_hThreadArray = (HANDLE *)VirtualAlloc(NULL,m_iMaxArraySize*sizeof(HANDLE),
MEM_COMMIT,PAGE_READWRITE);
m_hObjectArray = (DWORD *)VirtualAlloc(NULL,m_iMaxArraySize*sizeof(DWORD),
MEM_COMMIT,PAGE_READWRITE);
// µ±È»£¬Ò»¸öÕæÕýµÄʵÏÖ±ØÐèÔÚÕâÀïÌṩ¶Ô´íÎóµÄ´¦Àí...
};

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int DoForAllObjects(int iNoOfObjects,long *ObjectArray,
CONCURRENT_EXECUTION_ROUTINE pObjectProcessor,
CONCURRENT_FINISHING_ROUTINE pObjectTerminated);

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typedef DWORD (WINAPI *CONCURRENT_EXECUTION_ROUTINE)
(LPVOID lpParameterBlock);

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typedef DWORD (WINAPI *CONCURRENT_FINISHING_ROUTINE)
(LPVOID lpParameterBlock,LPVOID lpResultCode);

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ConcurrentExecution µÄÄÚ²¿¹¤×÷

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BOOL ConcurrentExecution::DoSerial(int iNoOfObjects,long *ObjectArray,
CONCURRENT_EXECUTION_ROUTINE pProcessor,
CONCURRENT_FINISHING_ROUTINE pTerminator)
{
for (int iLoop=0;iLoop<iNoOfObjects;iLoop++)
{
pTerminator((LPVOID)ObjectArray[iLoop],(LPVOID)pProcessor((LPVOID)ObjectArray[iLoop]));
};
return TRUE;

};

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ÁîÈ˸ÐÐËȤµÄ³ÉÔ±º¯ÊýÊÇ DoForAllObjects¡£Õ§Ò»¿´£¬DoForAllObjects ËùÒª×öµÄҲûÓÐʲôÌرðµÄ--ÇëÇó²Ù×÷ϵͳ´´½¨ÎªÃ¿Ò»¸ö¼ÆËãÒ»¸öỊ̈߳¬²¢ÇÒÈ·±£ÖÕ½áÆ÷º¯ÊýÄܹ»±»ÕýÈ·µØµ÷Óᣵ«ÊÇ£¬!
ÓÐÁ½¸öÎÊÌâʹµÃ DoForAllObjects ±ÈËüµÄ±íÃæÏÖÏóÒª¸´ÔÓ£ºµÚÒ»£¬µ±?
ÆËãµÄÊýÄ
¿¶àÓÚ¿ÉÓõÄÏß³ÌÊýʱ£¬ConcurrentExecution µÄÒ»¸öʵÀýËù´´½¨µÄ"²¢·¢µÄ×î´ó¶ÈÊý"²ÎÊý¿ÉÄÜÐèҪһЩ¸½¼ÓµÄ¼Ç¼(bookkeeping)¡£µÚ¶þ£¬Ã¿Ò»¸ö¼ÆËãµÄÖÕ½áÆ÷º¯Êý¶¼ÊÇÔÚµ÷Óà DoForAllObjects µÄÏ̵߳ÄÉÏÏÂÎÄÖб»µ÷Óõģ¬¶ø²»ÊÇÔڸüÆËãÔËÐÐËù´¦µÄÏß³ÌÉÏÏÂÎÄÖб»µ÷Óõģ»²¢ÇÒ£¬ÖÕ½áÆ÷ÊÇÔÚ´¦ÀíÆ÷½áÊøÖ®ºóÁ¢¿Ì±»µ÷Óõġ£Òª´¦ÀíÕâЩÎÊÌ⻹ÊÇÐèÒªºÜ¶à¼¼Çɵġ£

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int ConcurrentExecution::DoForAllObjects(int iNoOfObjects,long *ObjectArray,
CONCURRENT_EXECUTION_ROUTINE pObjectProcessor,
CONCURRENT_FINISHING_ROUTINE
pObjectTerminated)
{
int iLoop,iEndLoop;
DWORD iThread;
DWORD iArrayIndex;
DWORD dwReturnCode;
DWORD iCurrentArrayLength=0;
BOOL bWeFreedSomething;
char szBuf[70];

m_iCurrentNumberOfThreads=iNoOfObjects;

HANDLE *hPnt=(HANDLE *)VirtualAlloc(NULL,m_iCurrentNumberOfThreads*sizeof(HANDLE)
,MEM_COMMIT,PAGE_READWRITE);
for(iLoo!
p=0;iLoop<m_iCurrentNumberOfThreads;iLoop++)
hPnt[iLoop] = CreateThread(NULL,0,pObjectProcessor,(LPVOID)ObjectArray[iLoop],
CREATE_SUSPENDED,(LPDWORD)&iThread);

Ê×ÏÈ£¬ÎÒÃÇΪÿһ¸ö¶ÔÏó´´½¨µ¥¶ÀµÄÏ̡߳£ÒòΪÎÒÃÇʹÓà CREATE_SUSPENDED À´´´½¨¸ÃỊ̈߳¬ËùÒÔ»¹Ã»ÓÐÏ̱߳»Æô¶¯¡£ÁíÒ»ÖÖ·½·¨ÊÇÔÚÐèҪʱ´´½¨Ã¿Ò»¸öÏ̡߳£ÎÒ¾ö¶¨²»Ê¹ÓÃÕâÖÖÌæ´úµÄ²ßÂÔ£¬ÒòΪÎÒ·¢ÏÖµ±ÔÚÒ»¸öͬʱÔËÐÐÁ˶à¸öÏ̵߳ÄÓ¦ÓóÌÐòÖе÷ÓÃʱ£¬ CreateThread µ÷ÓÃÊǷdz£À˷ѵģ»ÕâÑù£¬Í¬ÔÚÔËÐÐʱ´´½¨Ã¿Ò»¸öÏß³ÌÏà±È£¬ÔÚ´Ëʱ´´½¨Ï̵߳ĿªÏú½«¸ü¼ÓÈÝÒ×½ÓÊÜ£¬

for (iLoop = 0; iLoop < m_iCurrentNumberOfThreads; iLoop++)
{
HANDLE hNewThread;
bWeFreedSomething=FALSE;
// Èç¹ûÊý×éΪ¿Õ£¬·ÖÅäÒ»¸ö slot ºÍ boogie¡£
if (!iCurrentArrayLength)
{
iArrayIndex = 0;
iCurrentArrayLength=1;
}
else
{
// Ê×ÏÈ£¬¼ì²éÎÒÃÇÊÇ·ñ¿ÉÒÔÖظ´Ê¹ÓÃÈÎºÎµÄ slot¡£ÎÒÃÇÏ£ÍûÔÚ²éÕÒÒ»¸öÐ嵀 slot ֮ǰÊ×ÏÈ// ×öÕâÏ×÷£¬ÕâÑùÎÒÃǾͿÉÒÔÁ¢¿Ìµ÷ÓøþÍÏ̵߳ÄÖÕ½áÆ÷...
iArrayIndex=WaitForMultipleObjects(iCurrentArrayLength,
m_hThrea!
dArray,FALSE,0);
if (iArrayIndex==WAIT_TIMEOUT) // no slot !
free...<
br>{
{
if (iCurrentArrayLength >= m_iMaxArraySize)
{
iArrayIndex= WaitForMultipleObjects(iCurrentArrayLength,
m_hThreadArray,FALSE,INFINITE);
bWeFreedSomething=TRUE;
}
else // ÎÒÃÇ¿ÉÒÔÊÍ·Åij´¦µÄÒ»¸ö slot£¬ÏÖÔÚ¾ÍÕâô×ö...
{
iCurrentArrayLength++;
iArrayIndex=iCurrentArrayLength-1;
}; // Else iArrayIndex points to a thread that has been nuked
};
}
else bWeFreedSomething = TRUE;
}; // ÔÚÕâÀiArrayIndex °üº¬Ò»¸öÓÐЧµÄË÷ÒýÒԴ洢еÄÏ̡߳£
hNewThread = hPnt[iLoop];
ResumeThread(hNewThread);
if (bWeFreedSomething)
{
GetExitCodeThread(m_hThreadArray[iArrayIndex],&dwReturnCode); //´íÎó
CloseHandle(m_hThreadArray[iArrayIndex]);
pObjectTerminated((void *)m_hObjectArray[iArrayIndex],(void *)dwReturnCode);
};
m_hThreadArray[iArrayIndex] = hNewThread;
m_hObjectArray[iArrayIndex] = ObjectArray[iLoop];
}; // Ñ­»·½áÊø

DoForAllObjects µÄºËÐÄÊÇ hPnt£¬ËüÊÇÒ»¸ö¶ÔÏóÊý×飬ÕâЩ¶ÔÏóÊǵ± ConcurrentExecution ¶Ô?
ó±»¹¹Ôìʱ·ÖÅäµÄ¡£¸ÃÊý×éÄܹ»ÈÝÄÉ×î´óÊýÄ¿µÄỊ̈߳¬´Ë×î´óÊýÄ¿ÓëÔÚ¹¹Ô캯ÊýÖÐÖ¸¶¨µÄ×î´ó²¢·¢¶ÈÊýÏà¶ÔÓ¦£»Òò´Ë£¬¸ÃÊý×éÖеÄÿһ¸öÔªËض¼ÊÇÒ»¸?quot;slot"£¬²¢ÓÐÒ»¸ö¼ÆËã¾ÓÓÚÖ®ÖС£

¹ØÓÚ¾ö¶¨ÈçºÎÌî³äºÍÊÍ·ÅµÄ slots Ëã·¨ÈçÏ£º¸Ã¶ÔÏóÊý×éÊÇ´ÓÍ·µ½Î²±éÀúµÄ£¬²¢ÇÒ¶ÔÓÚÿһ¸ö¶ÔÏó£¬ÎÒÃǶ¼×öÈçϵÄÊÂÇ飺Èç¹ûÉÐδÓÐ slot ÒѾ­±»Ìî³ä£¬ÎÒÃÇʹÓõ±Ç°µÄ¶ÔÏóÀ´Ìî³ä¸ÃÊý×éÖеĵÚÒ»¸ö slot£¬²¢ÇÒ¼ÌÐøÖ´Ðн«Òª´¦Àíµ±Ç°¶ÔÏóµÄÏ̡߳£Èç¹ûÖÁÉÙÓÐÒ»¸ö slot ±»Ê¹Óã¬ÎÒÃÇʹÓà WaitForMultipleObjects º¯ÊýÀ´¾ö¶¨ÊÇ·ñÓÐÕýÔÚÔËÐеÄÈκμÆËãÒѾ­½áÊø£»Èç¹ûÊÇ£¬ÎÒÃÇÔڸöÔÏóÉϵ÷ÓÃÖÕ½áÆ÷£¬²¢ÇÒΪжÔÏó"ÖØÓÃ"¸Ã slot¡£Çë×¢Ò⣬ÎÒÃÇÒ²¿ÉÒÔÊ×ÏÈÌî³äÿһ¸ö¿ÕÏÐµÄ slot£¬Ö±µ½Ã»ÓÐÊ£ÓàµÄ slots Ϊֹ£¬È»ºó¿ªÊ¼Ìî³ä¿ÕµÄ slot¡£µ«ÊÇ£¬Èç¹ûÎÒÃÇÕâÑù×öÁË£¬ÄÇô¿Õ³ö slot µÄÖÕ½áÆ÷º¯Êý½«²»»á±»µ÷Óã¬Ö±µ½ËùÓÐµÄ slot ¶¼ÒѾ­±»Ìî³ä£¬ÕâÑù¾ÍÎ¥·´ÁËÎÒÃÇÓйص±´¦ÀíÆ÷½áÊøÒ»¸ö¶ÔÏóʱ£¬ÖÕ½áÆ÷Á¢¿Ì±»µ÷ÓõÄÒªÇó¡£

×îºó£¬»¹ÓÐûÓпÕÏÐ slot µÄÇé¿ö£¨¾ÍÊÇ˵£¬µ±Ç°¼¤»îµÄÏß³ÌÊýµÈÓÚ ConcurrentExecution ¶ÔÏóËùÔÊÐíµÄ×î´ó²¢·¢¶ÈÊý£©¡£ÔÚÕâÖÖÇé¿öÏ£¬WaitForMultipleObjects ½«?
»Ôٴε÷ÓÃÒÔʹµ?DoForAllObjects ´¦ÓÚ"˯Ãß"״̬£¬Ö±µ½!
ÓÐÒ»¸ö s
lot ¿Õ³ö£»Ö»ÒªÕâÖÖÇé¿öÒ»·¢Éú£¬ÖÕ½áÆ÷¾Í±»ÔÚ¿Õ³ö slot µÄ¶ÔÏóÉϵ÷Ó㬲¢ÇÒ¹¤×÷ÓÚµ±Ç°¶ÔÏóµÄÏ̱߳»¼ÌÐøÖ´ÐС£

ÖÕÓÚ£¬ËùÓеļÆËãҪô¶¼ÒѾ­½áÊø£¬ÒªÃ´½«Õ¼ÓжÔÏóÊý×éÖÐµÄ slot¡£ÏÂÁеĴúÂ뽫»á´¦ÀíËùÓÐÊ£ÓàµÄỊ̈߳º

iEndLoop = iCurrentArrayLength;
for (iLoop=iEndLoop;iLoop>0;iLoop--)
{
iArrayIndex=WaitForMultipleObjects(iLoop, m_hThreadArray,FALSE,INFINITE);
if (iArrayIndex==WAIT_FAILED)
{
GetLastError();
_asm int 3; // ÕâÀïÒª×öһЩ´ÏÃ÷µÄÊÂ...
};
GetExitCodeThread(m_hThreadArray[iArrayIndex],&dwReturnCode); // ´íÎó£¿
if (!CloseHandle(m_hThreadArray[iArrayIndex]))
MessageBox(GetFocus(),"Cant delete thread!","",MB_OK); // ʹËü¸üºÃ...

pObjectTerminated((void *)m_hObjectArray[iArrayIndex],
(void *)dwReturnCode);
if (iArrayIndex==iLoop-1) continue; // ÕâÀïºÜºÃ£¬Ã»ÓÐÐèÒªÏòºóÌî³ä
m_hThreadArray[iArrayIndex]=m_hThreadArray[iLoop-1];
m_hObjectArray[iArrayIndex]=m_hObjectArray[iLoop-1];
};

×îºó£¬Çå³ý£º
!

if (hPnt) VirtualFree(hPnt,m_iCurrentNumberOfThreads*sizeof(HANDLE),
MEM_DECOMMIT);

return iCurrentArrayLength;

};

ʹÓà ConcurrentExecution À´ÊÔÑéÏß³ÌÐÔÄÜ

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ʹÓà ConcurrentExecution ÀàÀ´ÊÕ¼¯ÐÔÄÜÊý¾ÝµÄ´úÂëλÓÚ Threadlibtestview.cpp ÖС£Ê¾ÀýÓ¦ÓóÌÐò±¾Éí (Threadlibtest.exe) ÊÇÒ»¸öÕæÕýµÄµ¥Îĵµ½çÃæ (SDI) µÄ MFC Ó¦ÓóÌÐò¡£ËùÓÐÓëʾÀýÓйصĴúÂ붼פÁôÔÚ view ÀàµÄʵÏÖ CThreadLibTestView ÖУ¬ËüÊÇ´Ó CEasyOutputView ¼Ì³Ð¶øÀ´µÄ¡££¨ÓйضԸÃÀàµÄÌÖÂÛ£¬Çë²Î¿¼"Windows NT Security in Theory and Practice"¡££©ÕâÀï²¢²»°üº¬¸ÃÀàÖÐËùÓеÄÓÐȤ´úÂ룬Ëù°üº¬µÄ´ó²¿·ÖÊÇÆäÊý×Öͳ¼Æ²¿·ÖºÍÓû§½çÃæ´¦Àí²¿·Ö¡£Ö´ÐвâÊÔÖÐµÄ "meat" ÔÚ !
CThreadLibTestView::ExecuteTest ÖУ¬½«Ö´ÐÐÒ»¸ö²âÊÔÔËÐÐÖÜÆÚ¡£ÏÂÃæÊÇÓÐ¹Ø CThreadLibTestView::ExecuteTest µÄ¼òÂÔ´úÂ룺

void CThreadlibtestView::ExecuteTest()
{
ConcurrentExecution *ce;
bCPUBound=((m_iCompType&CT_IOBOUND)==0); // È«¾Ö...
ce = new ConcurrentExecution(25);
if (!QueryPerformanceCounter(&m_liOldVal)) return; // »ñµÃµ±Ç°Ê±¼ä¡£
if (!m_iCompType&CT_IOBOUND) timeBeginPeriod(1);
if (m_iCompType&CT_CONCURRENT)
m_iThreadsUsed=ce->DoForAllObjects(m_iNumberOfThreads,
(long *)m_iNumbers,
(CONCURRENT_EXECUTION_ROUTINE)pProcessor,
(CONCURRENT_FINISHING_ROUTINE)pTerminator);
else
ce->DoSerial(m_iNumberOfThreads,
(long *)m_iNumbers,
(CONCURRENT_EXECUTION_ROUTINE)pProcessor,
(CONCURRENT_FINISHING_ROUTINE)pTerminator);
if (!m_iCompType&CT_IOBOUND) timeEndPeriod(1);
delete(ce);
< ÆäËûµÄ´úÂëÔÚÒ»¸öÊý×éÖÐÅÅÐò½á¹û£¬ÒÔ¹© Excel ´¦Àí...>
}

¸Ã¶Î´úÂëÊ×ÏÈ´´½¨Ò»¸ö ConcurrentExecution ÀàµÄ¶ÔÏó£¬È»ºó£¬È¡Ñùµ±Ç°Ê±¼ä£¬£¨!
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Ö´Ðл¹ÊÇ
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extern "C"
{
long WINAPI pProcessor(long iArg)
{
PTHREADBLOCKSTRUCT ptArg=(PTHREADBLOCKSTRUCT)iArg;
BOOL bResult=TRUE;
int iDelay=(ptArg->iDelay);
if (bCPUBound)
{
int iLoopCount;
iLoopCount=(int)(((float)iDelay/1000.0)*ptArg->tbOutputTarget->m_iBiasFactor);
QueryPerformanceCounter(&ptArg->liStart);
for (int iCounter=0; iCounter<iLoopCount; iCounter++);
}
else
{
QueryPerformanceCounter(&ptArg->liStart);
Sleep(ptArg->iDelay);
};
return bResult;
}

long WINAPI pTerminator(long iArg, long iReturnCode)
{
PTHREADBLOCKSTRUCT ptArg=(PTHREADBLOCKSTRUCT)iArg;
QueryPerformanceCounter(&ptArg->liFini!
sh);
ptArg->iEndOrder=iEndIndex++;
return(0);
}

}

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