mirror of
https://github.com/fluencelabs/musl
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26 lines
582 B
C
26 lines
582 B
C
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#include "pthread_impl.h"
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const size_t __pthread_tsd_size = sizeof(void *) * PTHREAD_KEYS_MAX;
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static void nodtor(void *dummy)
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{
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}
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int pthread_key_create(pthread_key_t *k, void (*dtor)(void *))
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{
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static void (*keys[PTHREAD_KEYS_MAX])(void *);
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int i = (uintptr_t)&k / 16 % PTHREAD_KEYS_MAX;
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int j = i;
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libc.tsd_keys = keys;
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if (!dtor) dtor = nodtor;
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/* Cheap trick - &k cannot match any destructor pointer */
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while (a_cas_p(keys+j, 0, &k)
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&& (j=(j+1)%PTHREAD_KEYS_MAX) != i);
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if (keys[j] != (void (*)(void *))&k)
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return EAGAIN;
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keys[j] = dtor;
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*k = j;
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return 0;
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}
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