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