int PREFIXED(setspecific) (tsd * key, void * value) {
pthread_t self = pthread_self();
int hash_val = HASH(self);
volatile tse * entry = (volatile tse *)MALLOC_CLEAR(sizeof (tse));
GC_ASSERT(self != INVALID_THREADID);
if (0 == entry) return ENOMEM;
pthread_mutex_lock(&(key -> lock));
/* Could easily check for an existing entry here. */
entry -> next = key -> hash[hash_val];
entry -> thread = self;
entry -> value = value;
GC_ASSERT(entry -> qtid == INVALID_QTID);
/* There can only be one writer at a time, but this needs to be */
/* atomic with respect to concurrent readers. */
*(volatile tse **)(key -> hash + hash_val) = entry;
pthread_mutex_unlock(&(key -> lock));
return 0;
}
int PREFIXED(key_create) (tsd ** key_ptr, void (* destructor)(void *)) {
int i;
tsd * result = (tsd *)MALLOC_CLEAR(sizeof (tsd));
/* A quick alignment check, since we need atomic stores */
GC_ASSERT((unsigned long)(&invalid_tse.next) % sizeof(tse *) == 0);
if (0 == result) return ENOMEM;
pthread_mutex_init(&(result -> lock), NULL);
for (i = 0; i < TS_CACHE_SIZE; ++i) {
result -> cache[i] = &invalid_tse;
}
# ifdef GC_ASSERTIONS
for (i = 0; i < TS_HASH_SIZE; ++i) {
GC_ASSERT(result -> hash[i] == 0);
}
# endif
*key_ptr = result;
return 0;
}
GC_INNER int GC_key_create_inner(tsd ** key_ptr)
{
int i;
tsd * result = (tsd *)MALLOC_CLEAR(sizeof(tsd));
/* A quick alignment check, since we need atomic stores */
GC_ASSERT((word)(&invalid_tse.next) % sizeof(tse *) == 0);
if (0 == result) return ENOMEM;
pthread_mutex_init(&(result -> lock), NULL);
for (i = 0; i < TS_CACHE_SIZE; ++i) {
result -> cache[i] = (/* no const */ tse *)&invalid_tse;
}
# ifdef GC_ASSERTIONS
for (i = 0; i < TS_HASH_SIZE; ++i) {
GC_ASSERT(result -> hash[i].p == 0);
}
# endif
*key_ptr = result;
return 0;
}
/* Called with the lock held. */
GC_INNER int GC_setspecific(tsd * key, void * value)
{
pthread_t self = pthread_self();
int hash_val = HASH(self);
volatile tse * entry;
GC_ASSERT(self != INVALID_THREADID);
GC_dont_gc++; /* disable GC */
entry = (volatile tse *)MALLOC_CLEAR(sizeof(tse));
GC_dont_gc--;
if (0 == entry) return ENOMEM;
pthread_mutex_lock(&(key -> lock));
/* Could easily check for an existing entry here. */
entry -> next = key->hash[hash_val].p;
entry -> thread = self;
entry -> value = value;
GC_ASSERT(entry -> qtid == INVALID_QTID);
/* There can only be one writer at a time, but this needs to be */
/* atomic with respect to concurrent readers. */
AO_store_release(&key->hash[hash_val].ao, (AO_t)entry);
pthread_mutex_unlock(&(key -> lock));
return 0;
}
