Question

如果我多次使用CreateProcess()，可以分享PROCESS_INFORMATION和STARTUPINFO变量吗？或者这是非常糟糕的做法？我已经阅读了相当多的文档，但是我找不到任何关于不止一次处理CreateProcess()次调用的示例。

举个例子，假设我有以下虚假功能：

    int SampleClass::sampleFn1(){ 
        //Variables
        STARTUPINFOW siStartInfo; 
        PROCESS_INFORMATION piProcInfo; 
        memset(&siStartInfo, 0, sizeof(siStartInfo)); 
        memset(&piProcInfo, 0, sizeof(piProcInfo)); 
        siStartInfo.cb = sizeof(siStartInfo); 

        //let us assume cmdPath = cmd.exe directory, and cmdTxtPtr has correct text
        if(!CreateProcess(cmdPath, cmdTxtPtr, NULL, NULL, false, 0, 
        NULL, NULL, &siStartInfo, &piProcInfo)){
            return 1; //failed at step 1
        }
        if(!CreateProcess(cmdPath,_T("/C ant debug"),NULL,NULL,false,0,NULL,
        (LPCTSTR)directory,&siStartInfo,&piProcInfo)){
            return 2; //failed at debug
        }
        WaitForSingleObject(piProcInfo.hProcess,10000);
        result = GetExitCodeProcess(piProcInfo.hProcess,&exitCode);
        CloseHandle(piProcInfo.hProcess);
        CloseHandle(piProcInfo.hThread);
        return 0;//finished
    }

类似的功能恰好在我的程序中有效，但我希望尽可能安全。

或者......我应该做类似下面代码的事情：

    int SampleClass::sampleFn2(){   
        //Variables
        STARTUPINFOW siStartInfo; 
        PROCESS_INFORMATION piProcInfo; 
        memset(&siStartInfo, 0, sizeof(siStartInfo)); 
        memset(&piProcInfo, 0, sizeof(piProcInfo)); 
        siStartInfo.cb = sizeof(siStartInfo); 

        //let us assume cmdPath = cmd.exe directory, and cmdTxtPtr has correct text
        if(!CreateProcess(cmdPath, cmdTxtPtr, NULL, NULL, false, 
        0, NULL, NULL, &siStartInfo, &piProcInfo)){
            return 1; //failed at update project
        }
        WaitForSingleObject(piProcInfo.hProcess,10000);
        result = GetExitCodeProcess(piProcInfo.hProcess,&exitCode);
        CloseHandle(piProcInfo.hProcess);
        CloseHandle(piProcInfo.hThread);

        memset(&siStartInfo, 0, sizeof(siStartInfo)); 
        memset(&piProcInfo, 0, sizeof(piProcInfo)); 
        siStartInfo.cb = sizeof(siStartInfo); 
        if(!CreateProcess(cmdPath,_T("/C ant debug"),NULL,NULL,
        false,0,NULL,(LPCTSTR)directory,&siStartInfo,&piProcInfo)){
            return 2; //failed at debug
        }
        WaitForSingleObject(piProcInfo.hProcess,10000);
        result = GetExitCodeProcess(piProcInfo.hProcess,&exitCode);
        CloseHandle(piProcInfo.hProcess);
        CloseHandle(piProcInfo.hThread);
        return 0;//finished
    }

或者他们两个都处理不好？谢谢。

Answer 1

AFAIK CreateProcess函数写入STARTUPINFO和PROCESSINFO结构，所以除非你不关心任何我认为应该的信息，否则你可以做第二个例子。

通过将memset设为0，可以将结构中的所有数据重置为0.

我不确定这是非常好的做法，但也许其他人可以提供更多见解。

可以单独调用两个CreateProcess（）共享相同的启动和进程信息吗？

1 个答案: