程式回圈去讀取資料，但是每次都要CreateProcess創建管道讀取資料
問題：
能不能只創建一次，后面一直去讀取。因為看CreateProcess每次創建都浪費200-300多ms時間。
SECURITY_ATTRIBUTES sa;
HANDLE hRead,hWrite;
sa.nLength = sizeof(SECURITY_ATTRIBUTES);
sa.lpSecurityDescriptor = NULL;
sa.bInheritHandle = TRUE;
if (!CreatePipe(&hRead,&hWrite,&sa,0)) {
ShowLocalizedMsg("Error On CreatePipe()");
return 0;
}
STARTUPINFO si;
PROCESS_INFORMATION pi;
si.cb = sizeof(STARTUPINFO);
GetStartupInfo(&si);
si.hStdError = hWrite;
si.hStdOutput = hWrite;
si.wShowWindow = SW_HIDE;
si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
if (!CreateProcess(NULL,
"c:\\Windows\\system32\\cmd.exe",
NULL,
NULL,
TRUE,
NULL,
NULL,
NULL,
&si,
&pi)
) {
ShowLocalizedMsg("Error on CreateProcess()");
return 0;
}
CloseHandle(hWrite);
char buffer[4096] = {0};
DWORD bytesRead;
while (true) {
if (ReadFile(hRead,buffer,4095,&bytesRead,NULL) == NULL)
break;
printf("%s\n", buffer);
Sleep(200);
}
return 0;
uj5u.com熱心網友回復：
可以一次創建，永久使用，要管理好句柄轉載請註明出處，本文鏈接：https://www.uj5u.com/gongcheng/133838.html
標籤：進程/線程/DLL
上一篇：為什么要對影像經行亮度補償