static void
test_atomic_flag(void)
{
pg_atomic_flag flag;
pg_atomic_init_flag(&flag);
if (!pg_atomic_unlocked_test_flag(&flag))
elog(ERROR, "flag: unexpectedly set");
if (!pg_atomic_test_set_flag(&flag))
elog(ERROR, "flag: couldn't set");
if (pg_atomic_unlocked_test_flag(&flag))
elog(ERROR, "flag: unexpectedly unset");
if (pg_atomic_test_set_flag(&flag))
elog(ERROR, "flag: set spuriously #2");
pg_atomic_clear_flag(&flag);
if (!pg_atomic_unlocked_test_flag(&flag))
elog(ERROR, "flag: unexpectedly set #2");
if (!pg_atomic_test_set_flag(&flag))
elog(ERROR, "flag: couldn't set");
pg_atomic_clear_flag(&flag);
}
void cfs_initialize()
{
cfs_state = (CfsState*)ShmemAlloc(sizeof(CfsState));
pg_atomic_init_flag(&cfs_state->gc_started);
if (cfs_encryption) {
cfs_rc4_init();
}
elog(LOG, "Start CFS version %s compression algorithm %s encryption %s",
CFS_VERSION, cfs_algorithm(), cfs_encryption ? "enabled" : "disabled");
}
/*
* IPCMessageBrokerShmemInit
*/
void
IPCMessageBrokerShmemInit(void)
{
bool found;
Size size = IPCMessageBrokerShmemSize();
LWLockAcquire(IPCMessageBrokerIndexLock, LW_EXCLUSIVE);
broker_meta = ShmemInitStruct("BrokerMeta", size, &found);
if (!found)
{
HASHCTL ctl;
int i;
MemSet(broker_meta, 0, size);
pg_atomic_init_flag(&broker_meta->waiting);
MemSet(&ctl, 0, sizeof(HASHCTL));
ctl.keysize = sizeof(Oid);
ctl.entrysize = broker_db_meta_size;
ctl.hash = oid_hash;
broker_meta->db_meta_hash = ShmemInitHash("BrokerDBMetaHash", 4, 16, &ctl, HASH_ELEM | HASH_FUNCTION);
/* Initialize LWLocks that we'll use for all IPC queues */
broker_meta->tranche_id = LWLockNewTrancheId();
broker_meta->tranche.name = "BrokerMetaLWLocks";
broker_meta->tranche.array_base = (void *) broker_meta->locks;
broker_meta->tranche.array_stride = sizeof(lw_lock_slot);
for (i = 0; i < max_worker_processes; i++)
{
lw_lock_slot *slot = &broker_meta->locks[i];
LWLockInitialize(&slot->lock, broker_meta->tranche_id);
slot->dbid = InvalidOid;
}
}
LWLockRelease(IPCMessageBrokerIndexLock);
LWLockRegisterTranche(broker_meta->tranche_id, &broker_meta->tranche);
}
