Read_Writer.rar_读者写者_读者写者问题

#include "windows.h" #include <iostream.h> const MAX_THREAD_NUM = 64; //最大线程数 CRITICAL_SECTION hRead; CRITICAL_SECTION hWrite; int ReaderCount = 0; DWORD WINAPI Reader( LPVOID lpParameter //therad data ); DWORD WINAPI Writer( LPVOID lpParameter //therad data ); void main () { HANDLE ReaderThread[MAX_THREAD_NUM]; HANDLE WriterThread[MAX_THREAD_NUM]; for (int i=0; i<5; i++) { ReaderThread[i] = CreateThread (NULL, 0, Reader, NULL, 0, NULL); CloseHandle(ReaderThread[i]); } for (int j=0; j<3; j++) { WriterThread[j] = CreateThread (NULL, 0, Writer, NULL, 0, NULL); CloseHandle(WriterThread[i]); } InitializeCriticalSection (&hRead); InitializeCriticalSection (&hWrite); Sleep(4000); DeleteCriticalSection (&hRead); DeleteCriticalSection (&hWrite); } DWORD WINAPI Reader (LPVOID lpParameter) { EnterCriticalSection (&hRead); if (ReaderCount == 0) EnterCriticalSection (&hWrite); ReaderCount = ReaderCount + 1; LeaveCriticalSection (&hRead); cout<<"Reader is reading!"<<endl; Sleep (10); cout<<"Reader finish reading!"<<endl; EnterCriticalSection (&hRead); ReaderCount = ReaderCount - 1; if (ReaderCount == 0) LeaveCriticalSection (&hWrite); LeaveCriticalSection (&hRead); return 0; } DWORD WINAPI Writer (LPVOID lpParameter) { EnterCriticalSection (&hWrite); cout<<"Writer is writing!"<<endl; LeaveCriticalSection (&hWrite); return 0; }