#include "stdio_impl.h"
#include "pthread_impl.h"
-#define MAYBE_WAITERS 0x40000000
-
void flockfile(FILE *f)
{
- while (ftrylockfile(f)) {
- int owner = f->lock;
- if (!owner) continue;
- a_cas(&f->lock, owner, owner|MAYBE_WAITERS);
- __futexwait(&f->lock, owner|MAYBE_WAITERS, 1);
- }
+ if (!ftrylockfile(f)) return;
+ __lockfile(f);
+ __register_locked_file(f, __pthread_self());
}