1 #include "stdio_impl.h" 2 #include "pthread.h" 3 __lockfile(FILE * f)4int __lockfile(FILE *f) 5 { 6 return pthread_mutex_lock((pthread_mutex_t *)f->lock); 7 } 8 __unlockfile(FILE * f)9int __unlockfile(FILE *f) 10 { 11 return pthread_mutex_unlock((pthread_mutex_t *)f->lock); 12 } 13