線程同步 互斥

互斥對象 一、建立一個 HANDLE 類型變數   HANDLE hMutex;

二、hMutex=CreateMutex(NULL,TRUE,"Ticket"); CreateMutex 建立互斥對象

(在建立成功後要及時調用ReleaseMutex(hMutex);   去讓計數減一. ) 

三、 WaitForSingleObject(hMutex,INFINITE);  使用在需要同步的地方使用這個函數.實現同步

四、 ReleaseMutex(hMutex);  在使用等待對象後，得使用這個函數去釋放互斥鎖.樣本#include <windows.h>#include <iostream.h>  DWORD WINAPI fun1Proc(              LPVOIDlpParameter   // thread data);DWORD WINAPI fun2Proc(                                     LPVOID lpParameter   // thread data                                     );int ticket=100;HANDLE hMutex;void main(){       HANDLE handle1;       HANDLE handle2;          handle1=CreateThread(NULL,0,fun1Proc,NULL,0,NULL);       handle2=CreateThread(NULL,0,fun2Proc,NULL,0,NULL);       CloseHandle(handle1);       CloseHandle(handle2);       hMutex=CreateMutex(NULL,TRUE,"Ticket");       if (hMutex)       {              if(ERROR_ALREADY_EXISTS==GetLastError()){                     cout<<"Thereis already have a Instance runing!!!"<<endl;                     return;              }       } //   WaitForSingleObject(hMutex,INFINITE);  //        ReleaseMutex(hMutex);  ReleaseMutex(hMutex); Sleep(4000);} DWORD WINAPI fun1Proc(                                     LPVOID lpParameter   // thread data                                     ){      while (true)       {              WaitForSingleObject(hMutex,INFINITE);              if(ticket>0){                     Sleep(1);                     cout<<"Thisis fun1Proc sell "<< ticket --<<endl;              }              else{                     break;              }              ReleaseMutex(hMutex);       }       WaitForSingleObject(hMutex,INFINITE);       cout<<"fun1Procrunning"<<endl;       ReleaseMutex(hMutex);       return 0;} DWORD WINAPI fun2Proc(                                     LPVOID lpParameter   // thread data                                     ){        while (TRUE)       {              WaitForSingleObject(hMutex,INFINITE);              if(ticket>0){                     Sleep(1);                     cout<<"Thisis fun2Proc sell "<<ticket --<<endl;              }              else{                     break;              }              ReleaseMutex(hMutex);       }       WaitForSingleObject(hMutex,INFINITE);       cout<<"fun2Procrunning"<<endl;       ReleaseMutex(hMutex);       return 0;}