Пример #1
0
/*
 * Unregister entry from cleanup list of the cache
 *
 */
static void
Cache_UnregisterCleanup(Cache *cache, CacheEntry *entry)
{
	Assert(NULL != cache);
	Assert(NULL != entry);

	Dlelem *crtElem = DLGetHead(cache->ownedEntries);
	while (NULL != crtElem && DLE_VAL(crtElem) != entry)
	{
		crtElem = DLGetSucc(crtElem);
	}

	Assert(NULL != crtElem && "could not locate element");

	/* Found matching element. Remove and free. Note that entry is untouched */
	DLRemove(crtElem);
	DLFreeElem(crtElem);

}
Пример #2
0
/* remove invalid notifies before returning */
void
PQcleanNotify()
{
  Dlelem *e, *next;
  PQNotifyList *p;

  e = DLGetHead(pqNotifyList);

  while (e) {
    next = DLGetSucc(e);
    p = (PQNotifyList*)DLE_VAL(e);
    if (p->valid == 0)  {
      DLRemove(e);
      DLFreeElem(e);
      pfree(p);
    }
    e = next;
  }
}
Пример #3
0
/*
 * Releases/Surrenders all entries held by this client
 *
 * During normal functionality, client should release all the owned entries
 * and this is a no-op. In case of a client error, this callback makes sure all
 * entries are returned to the cache.
 *
 * This function operates on client data and does not need to be synchronized.
 */
void
Cache_SurrenderClientEntries(Cache *cache)
{
	Assert(NULL != cache);

	uint32 nAcquiredEntries = 0;
	uint32 nCachedEntries = 0;
	Dlelem *elt = NULL;

	/* Surrender all owned entries */
	while (NULL != (elt = DLRemHead(cache->ownedEntries)))
	{
		CacheEntry *entry = DLE_VAL(elt);

		switch(entry->state)
		{
			case CACHE_ENTRY_ACQUIRED:
				Cache_ReleaseAcquired(cache, entry, false /* unregisterCleanup */);
				nAcquiredEntries++;
				break;
			case CACHE_ENTRY_CACHED:
			case CACHE_ENTRY_DELETED:
				Cache_ReleaseCached(cache, entry, false /* unregisterCleanup */);
				nCachedEntries++;
				break;
			default:
				Assert(false && "unexpected cache entry state");
		}

		/* Free linked list element */
		DLFreeElem(elt);
	}

	if (nAcquiredEntries > 0 || nCachedEntries > 0)
	{
		elog(gp_workfile_caching_loglevel, "Cleanup released %u acquired and %u cached entries from client",
			nAcquiredEntries, nCachedEntries);
	}
}