mirror of
https://github.com/fluencelabs/musl
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20 lines
406 B
C
20 lines
406 B
C
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#include "stdio_impl.h"
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#include "pthread_impl.h"
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void __lockfile(FILE *f)
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{
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int spins;
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if (f->owner < 0) return;
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if (f->owner && f->owner == __pthread_self()->tid) {
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while (f->lockcount == INT_MAX);
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f->lockcount++;
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return;
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}
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spins = 100000;
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while (a_swap(&f->lock, 1))
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if (spins) spins--, a_spin();
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else syscall0(__NR_sched_yield);
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f->owner = __pthread_self()->tid;
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f->lockcount = 1;
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}
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