读者写者问题实验报告3

1、 printf(Reader%disReadingtheSharedBuffer.n,pPerson-m_nID);printf(nn*n);while(g_CurrentTimem_nStartTime+pPerson-m_nWorkTime)printf(Reader%disExit.n,pPerson-m_nID);printf(nn*n);WaitForSingleObject(g_hReadSemaphore,INFINITE);g_NumOfReading-;if(g_NumOfReading=0)ReleaseSemaphore(g_hWriteSemaphore,l,NULL)

2、/此时没有读者，可以写ReleaseSemaphore(g_hReadSemaphore,l,NULL);if(pPerson-m_nID=4)finished=true;/所有的读写完成ExitThread(0);return0;DWORDWINAPIWriterProc(LPVOIDlpParam)Person*pPerson=(Person*)lpParam;/waitforthestarttimewhile(g_CurrentTime!=pPerson-m_nStartTime)printf(Writer%disRequesting.n,pPerson-m_nID);printf(nn

3、*n);WaitForSingleObject(g_hWriteSemaphore,INFINITE);/modifythewritersrealstarttimepPerson-m_nStartTime=g_CurrentTime;printf(Writer%disWrittingtheSharedBuffer.n,pPerson-m_nID);while(g_CurrentTimem_nStartTime+pPerson-m_nWorkTime)printf(Writer%disExit.n,pPerson-m_nID);printf(nn*n);/g_NumOfWriteRequest-

4、;ReleaseSemaphore(g_hWriteSemaphore,1,NULL);if(pPerson-m_nID=4)finished=true;/所有的读写完成ExitThread(0);return0;boolCreateReader(intStartTime,intWorkTime,intID)DWORDdwThreadID;if(g_NumPerson=MAX_PERSON)returnfalse;Person*pPerson=&g_Personsg_NumPerson;pPerson-m_nID=ID;pPerson-m_nStartTime=StartTime;pPerso

5、n-m_nWorkTime=WorkTime;pPerson-m_nType=READER;g_NumPerson+;/CreateanNewThreadpPerson-m_hThread=CreateThread(NULL,0,ReaderProc,(LPVOID)pPerson,0,&dwThreadID);if(pPerson-m_hThread=NULL)returnfalse;returntrue;boolCreateWriter(intStartTime,intWorkTime,intID)DWORDdwThreadID;if(g_NumPerson=MAX_PERSON)returnfalse;Person*pPerson=&g_Personsg_NumPerson;pPerson-m_nID=ID;pPerson-m_nStartTime=StartTime;pPerson-m_nWorkTime=WorkTime;pPerson-m_nType=WRITER;g_NumPerson+;/CreateanNewThreadpPerson-m_hThread=CreateThread(NULL,0,W