1*c9945492SAndroid Build Coastguard Worker #include "stdio_impl.h"
2*c9945492SAndroid Build Coastguard Worker #include "pthread_impl.h"
3*c9945492SAndroid Build Coastguard Worker
4*c9945492SAndroid Build Coastguard Worker #ifdef __GNUC__
5*c9945492SAndroid Build Coastguard Worker __attribute__((__noinline__))
6*c9945492SAndroid Build Coastguard Worker #endif
locking_putc(int c,FILE * f)7*c9945492SAndroid Build Coastguard Worker static int locking_putc(int c, FILE *f)
8*c9945492SAndroid Build Coastguard Worker {
9*c9945492SAndroid Build Coastguard Worker if (a_cas(&f->lock, 0, MAYBE_WAITERS-1)) __lockfile(f);
10*c9945492SAndroid Build Coastguard Worker c = putc_unlocked(c, f);
11*c9945492SAndroid Build Coastguard Worker if (a_swap(&f->lock, 0) & MAYBE_WAITERS)
12*c9945492SAndroid Build Coastguard Worker __wake(&f->lock, 1, 1);
13*c9945492SAndroid Build Coastguard Worker return c;
14*c9945492SAndroid Build Coastguard Worker }
15*c9945492SAndroid Build Coastguard Worker
do_putc(int c,FILE * f)16*c9945492SAndroid Build Coastguard Worker static inline int do_putc(int c, FILE *f)
17*c9945492SAndroid Build Coastguard Worker {
18*c9945492SAndroid Build Coastguard Worker int l = f->lock;
19*c9945492SAndroid Build Coastguard Worker if (l < 0 || l && (l & ~MAYBE_WAITERS) == __pthread_self()->tid)
20*c9945492SAndroid Build Coastguard Worker return putc_unlocked(c, f);
21*c9945492SAndroid Build Coastguard Worker return locking_putc(c, f);
22*c9945492SAndroid Build Coastguard Worker }
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