Question

I tried to redirect standart output (cout) to a file, for debugging purposes

std::ofstream traceFile;
traceFile.open("c:/path/file.txt");
std::streambuf* fileBuff = traceFile.rdbuf();

std::cout.rdbuf(fileBuff);

std::cout << std::unitbuff;

std::cout << "disk is written\n";

But calling cout from a new thread make the code stuck on a mutex. (xmtx.c 39: _Mtxlock()).

Have you got an idea, how i could solve it?

Thank you

Answer 1

This example works fine for me, whilst your test case doesn’t. On my machine your code seemed to double free the streambuf from the file, whereas this example swaps it back before the destructors are called.