flockfile.c\stdio\src - musl - musl - an implementation of the standard library for Linux-based systems

#include "stdio_impl.h"
#include "pthread_impl.h"
void flockfile(FILE *f)
{
	if (!ftrylockfile(f)) return;
	__lockfile(f);
	__register_locked_file(f, __pthread_self());
}