#include "pch.h"#include#include //线程同步：消息、事件、临界区（不是内核对象）、互斥体//创建互斥体对象，守护程序利用OpenMutex()函数检测对方的互斥体对象是否存在，不存在则创建进程//线程回调函数//参数：程序名称DWORD WINAPI ThreadCheckProc(LPVOID lParam) { STARTUPINFOA si = { sizeof(si) }; PROCESS_INFORMATION pi = { 0 }; HANDLE hMutex; while (true) { hMutex = OpenMutexA(MUTEX_ALL_ACCESS, FALSE, (LPCSTR)lParam); if (!hMutex) { //unicode下，用W版会失败 CreateProcessA( (LPCSTR)lParam, NULL, NULL, NULL, FALSE, CREATE_NEW_CONSOLE, NULL, NULL, &si, &pi); WaitForSingleObject(pi.hProcess, INFINITE); CloseHandle(pi.hProcess); CloseHandle(pi.hThread); } else { CloseHandle(hMutex); } Sleep(500); }}int main(){ DWORD Tid; //创建自己的互斥体对象 CreateMutexA(NULL, TRUE, (LPCSTR)"p1.exe"); //创建线程检测对方的互斥体 CreateThread(NULL, 0, ThreadCheckProc, (LPVOID*)"p2.exe", 0, &Tid); while (1) { Sleep(500); }; return 0;}
#include "pch.h"#include#include /线程回调函数//参数：程序名称DWORD WINAPI ThreadCheckProc(LPVOID lParam) { STARTUPINFOA si = { sizeof(si) }; PROCESS_INFORMATION pi = { 0 }; HANDLE hMutex; while (true) { hMutex = OpenMutexA(MUTEX_ALL_ACCESS, FALSE, (LPCSTR)lParam); if (!hMutex) { //unicode下，用W版会失败 CreateProcessA( (LPCSTR)lParam, NULL, NULL, NULL, FALSE, CREATE_NEW_CONSOLE, NULL, NULL, &si, &pi); WaitForSingleObject(pi.hProcess, INFINITE); CloseHandle(pi.hProcess); CloseHandle(pi.hThread); } else { CloseHandle(hMutex); } Sleep(500); }}int main(){ DWORD Tid; //创建自己的互斥体对象 CreateMutexA(NULL, TRUE, (LPCSTR)"p2.exe"); //创建线程检测对方的互斥体 CreateThread(NULL, 0, ThreadCheckProc, (LPVOID*)"p1.exe", 0, &Tid); while (1) { Sleep(500); }; return 0;}
编译环境：vs2017 unicode
修改生成的程序为p1.exe，p2.exe，并且p1.exe，p2.exe在同一路径下，可以实现简单的双进程守护。
挂起其中的一个进程，可以实现全部关闭。或者，迅速关闭p1.exe，p2.exe亦可。