1 #include "stdio_impl.h"
2 #include "pthread_impl.h"
4 int __lockfile(FILE *f)
6 int owner, tid = __pthread_self()->tid;
9 while ((owner = a_cas(&f->lock, 0, tid)))
10 __wait(&f->lock, &f->waiters, owner, 1);
14 void __unlockfile(FILE *f)
17 if (f->waiters) __wake(&f->lock, 1, 1);