casynchronouswinapistdiniocp

Win32: Impossible to use iocp with stdin handle

I want to make asynchronous read on stdin in Windows with I/O Completion Ports but this code doesn't works :

#include <windows.h>
#include <stdio.h>

#pragma comment(lib, "Kernel32.lib")

int main() {
    HANDLE handle = GetStdHandle(STD_INPUT_HANDLE);
    DWORD number;

    HANDLE iocp = CreateIoCompletionPort(handle, NULL, 0, 0);

    if(iocp == NULL) {
        printf("error : %d\n", GetLastError());
    }
}

I get the error 87 : ERROR_INVALID_PARAMETER

Solution

  • CreateIOCompletionPort cannot be used directly with stdin/stdout. Check this. Either use a thread, or redirect stdin/stdout to named pipes.