c++ - WaitForSingleObject不等待过程结束

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Why those two different behaviors with WaitForSingleObject function in CPP
                            
                                （2个答案）
                            
                    
                2年前关闭。
        

    

我想等待进程执行结束（calc.exe），但是它不起作用。
我的程序快速完成/现在完成，而我的进程（calc.exe）继续运行（我没有停止它）。

WaitForSingleObject立即返回WAIT_OBJECT_0。

ps：我禁用了软件防病毒（AVIRA）

int main(int argc, char** arv)
{
STARTUPINFO si;
PROCESS_INFORMATION pi;

ZeroMemory(&si, sizeof(si));
si.cb = sizeof(si);
ZeroMemory(&pi, sizeof(pi));

const char * calcPrgm = "C:\\\\Windows\\System32\\calc.exe";
LPSTR calcPrgmLpstr = const_cast<LPSTR>(calcPrgm);

// Start the child process.
if (!CreateProcess(NULL,   // No module name (use command line)
    calcPrgmLpstr,        // Command line
    NULL,           // Process handle not inheritable
    NULL,           // Thread handle not inheritable
    FALSE,          // Set handle inheritance to FALSE
    0,              // No creation flags
    NULL,           // Use parent's environment block
    NULL,           // Use parent's starting directory
    &si,            // Pointer to STARTUPINFO structure
    &pi)           // Pointer to PROCESS_INFORMATION structure
    )
{
    printf("CreateProcess failed (%d).\n", GetLastError());
    return -1;
}

// Wait until child process exits.
auto ret = WaitForSingleObject(pi.hProcess, INFINITE);
printf("WaitForSingleObject ret = %x\n", ret);
if (ret == WAIT_OBJECT_0)
{
    printf("WaitForSingleObject ret ret == WAIT_OBJECT_0\n");
}
BOOL b = FALSE;
DWORD n = 0;
b = GetExitCodeProcess(pi.hProcess, &n);

// Close process and thread handles.
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
printf("WaitForSingleObject end\n");
return 0;
}

最佳答案

我发现了错误。 “ calc.exe”在退出之前创建另一个进程。我使用“ Sleep（60 * 1000）;”主代码中的1行代码创建/调用了自己的程序。没关系:)

关于c++ - WaitForSingleObject不等待过程结束，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/51674939/