| #include "stdio_impl.h" | |
| #include "pthread_impl.h" | |
| #ifdef __GNUC__ | |
| __attribute__((__noinline__)) | |
| #endif | |
| static int locking_putc(int c, FILE *f) | |
| { | |
| if (a_cas(&f->lock, 0, MAYBE_WAITERS-1)) __lockfile(f); | |
| c = putc_unlocked(c, f); | |
| if (a_swap(&f->lock, 0) & MAYBE_WAITERS) | |
| __wake(&f->lock, 1, 1); | |
| return c; | |
| } | |
| static inline int do_putc(int c, FILE *f) | |
| { | |
| int l = f->lock; | |
| if (l < 0 || l && (l & ~MAYBE_WAITERS) == __pthread_self()->tid) | |
| return putc_unlocked(c, f); | |
| return locking_putc(c, f); | |
| } |