mirror of
https://github.com/fluencelabs/musl
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17 lines
389 B
C
17 lines
389 B
C
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#define SYSCALL_RETURN_ERRNO
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#include "pthread_impl.h"
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void __wait(volatile int *addr, volatile int *waiters, int val, int priv)
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{
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int spins=50000;
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if (priv) priv = 128; priv=0;
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while (spins--) {
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if (*addr==val) a_spin();
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else return;
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}
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if (waiters) a_inc(waiters);
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while (*addr==val)
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syscall4(__NR_futex, (long)addr, FUTEX_WAIT|priv, val, 0);
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if (waiters) a_dec(waiters);
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}
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