92 lines
2.0 KiB
C
92 lines
2.0 KiB
C
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#include "pthread_impl.h"
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volatile size_t __pthread_tsd_size = sizeof(void *) * PTHREAD_KEYS_MAX;
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void *__pthread_tsd_main[PTHREAD_KEYS_MAX] = { 0 };
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static void (*keys[PTHREAD_KEYS_MAX])(void *);
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static pthread_rwlock_t key_lock = PTHREAD_RWLOCK_INITIALIZER;
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static pthread_key_t next_key;
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static void nodtor(void *dummy)
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{
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}
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static void dummy_0(void)
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{
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}
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weak_alias(dummy_0, __tl_lock);
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weak_alias(dummy_0, __tl_unlock);
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int __pthread_key_create(pthread_key_t *k, void (*dtor)(void *))
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{
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pthread_t self = __pthread_self();
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/* This can only happen in the main thread before
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* pthread_create has been called. */
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if (!self->tsd) self->tsd = __pthread_tsd_main;
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/* Purely a sentinel value since null means slot is free. */
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if (!dtor) dtor = nodtor;
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__pthread_rwlock_wrlock(&key_lock);
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pthread_key_t j = next_key;
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do {
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if (!keys[j]) {
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keys[next_key = *k = j] = dtor;
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__pthread_rwlock_unlock(&key_lock);
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return 0;
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}
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} while ((j=(j+1)%PTHREAD_KEYS_MAX) != next_key);
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__pthread_rwlock_unlock(&key_lock);
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return EAGAIN;
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}
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int __pthread_key_delete(pthread_key_t k)
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{
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sigset_t set;
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pthread_t self = __pthread_self(), td=self;
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__block_app_sigs(&set);
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__pthread_rwlock_wrlock(&key_lock);
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__tl_lock();
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do td->tsd[k] = 0;
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while ((td=td->next)!=self);
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__tl_unlock();
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keys[k] = 0;
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__pthread_rwlock_unlock(&key_lock);
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__restore_sigs(&set);
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return 0;
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}
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void __pthread_tsd_run_dtors()
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{
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pthread_t self = __pthread_self();
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int i, j;
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for (j=0; self->tsd_used && j<PTHREAD_DESTRUCTOR_ITERATIONS; j++) {
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__pthread_rwlock_rdlock(&key_lock);
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self->tsd_used = 0;
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for (i=0; i<PTHREAD_KEYS_MAX; i++) {
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void *val = self->tsd[i];
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void (*dtor)(void *) = keys[i];
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self->tsd[i] = 0;
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if (val && dtor && dtor != nodtor) {
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__pthread_rwlock_unlock(&key_lock);
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dtor(val);
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__pthread_rwlock_rdlock(&key_lock);
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}
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}
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__pthread_rwlock_unlock(&key_lock);
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}
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}
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weak_alias(__pthread_key_create, pthread_key_create);
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weak_alias(__pthread_key_delete, pthread_key_delete);
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