Question

I am looking for a way to create a program in unmanaged c++ that waits until a file is unlocked (as in it is no longer in use) and than does something. I have had no luck locating how to do this, any help would be appreciated!

UPDATE: I may have answered my own question, see below and tell me what you think..

UPDATE: All that really matters is that the file is writable, it doesn’t matter if it is still in use.

Answer 1

Here is one possible solution to my problem, does anyone see a problem with this?

#include <iostream>
#include <fstream>
#include <windows.h>
using namespace std;
void main(int argc, char ** argv) {
    if (argc < 2 || argc > 2) {
        return;
    }

    ofstream myfile;
    myfile.open(argv[1], ios_base::app);
    while (!myfile.is_open()) { Sleep(100); myfile.open(argv[1], ios_base::app); }
    myfile.close();

    // file should now be unlocked..
}

Thanks again!

UPDATE: Changed the code to be more complete.