How to check if a file has been opened by another application in C++?

Question

I know, that there\'s the is_open() function in C++, but I want one program to check if a file hasn\'t been opened by another application. Is there any way to d

Answer 1

Perhaps you could just try and get a full write lock? It'll fail if anyone else has it open for reading or writing.

fopen("myfile.txt", "r+")

If it's not cross platform and is Win32, then you can request even more fine-grained set of locks.

See here and look at dwShareMode, value of 0, as well as the other parameters.