void TRI_RemoveBarrierCollectionsAql (TRI_aql_context_t* const context) {
size_t i;
// iterate in reverse order
i = context->_collections._length;
while (i--) {
TRI_aql_collection_t* collection = (TRI_aql_collection_t*) context->_collections._buffer[i];
assert(collection);
assert(collection->_name);
if (! collection->_collection || ! collection->_barrier) {
// don't process collections we weren't able to lock at all
continue;
}
assert(collection->_barrier);
assert(collection->_collection->_collection);
LOG_TRACE("removing barrier for collection '%s'", collection->_name);
TRI_FreeBarrier(collection->_barrier);
collection->_barrier = NULL;
}
}
void TRI_CompactorVocBase (void* data) {
TRI_vocbase_t* vocbase;
TRI_vector_pointer_t collections;
vocbase = data;
assert(vocbase->_state == 1);
TRI_InitVectorPointer(&collections, TRI_UNKNOWN_MEM_ZONE);
while (true) {
int state;
// keep initial _state value as vocbase->_state might change during compaction loop
state = vocbase->_state;
// check if compaction is currently disallowed
if (CheckAndLockCompaction(vocbase)) {
// compaction is currently allowed
size_t i, n;
// copy all collections
TRI_READ_LOCK_COLLECTIONS_VOCBASE(vocbase);
TRI_CopyDataVectorPointer(&collections, &vocbase->_collections);
TRI_READ_UNLOCK_COLLECTIONS_VOCBASE(vocbase);
n = collections._length;
for (i = 0; i < n; ++i) {
TRI_vocbase_col_t* collection;
TRI_primary_collection_t* primary;
TRI_col_type_e type;
bool doCompact;
bool worked;
collection = collections._buffer[i];
if (! TRI_TRY_READ_LOCK_STATUS_VOCBASE_COL(collection)) {
// if we can't acquire the read lock instantly, we continue directly
// we don't want to stall here for too long
continue;
}
primary = collection->_collection;
if (primary == NULL) {
TRI_READ_UNLOCK_STATUS_VOCBASE_COL(collection);
continue;
}
worked = false;
doCompact = primary->base._info._doCompact;
type = primary->base._info._type;
// for document collection, compactify datafiles
if (TRI_IS_DOCUMENT_COLLECTION(type)) {
if (collection->_status == TRI_VOC_COL_STATUS_LOADED && doCompact) {
TRI_barrier_t* ce;
// check whether someone else holds a read-lock on the compaction lock
if (! TRI_TryWriteLockReadWriteLock(&primary->_compactionLock)) {
// someone else is holding the compactor lock, we'll not compact
TRI_READ_UNLOCK_STATUS_VOCBASE_COL(collection);
continue;
}
ce = TRI_CreateBarrierCompaction(&primary->_barrierList);
if (ce == NULL) {
// out of memory
LOG_WARNING("out of memory when trying to create a barrier element");
}
else {
worked = CompactifyDocumentCollection((TRI_document_collection_t*) primary);
TRI_FreeBarrier(ce);
}
// read-unlock the compaction lock
TRI_WriteUnlockReadWriteLock(&primary->_compactionLock);
}
}
TRI_READ_UNLOCK_STATUS_VOCBASE_COL(collection);
if (worked) {
// signal the cleanup thread that we worked and that it can now wake up
TRI_LockCondition(&vocbase->_cleanupCondition);
TRI_SignalCondition(&vocbase->_cleanupCondition);
TRI_UnlockCondition(&vocbase->_cleanupCondition);
}
}
UnlockCompaction(vocbase);
}
if (state != 2 && vocbase->_state == 1) {
// only sleep while server is still running
TRI_LockCondition(&vocbase->_compactorCondition);
TRI_TimedWaitCondition(&vocbase->_compactorCondition, (uint64_t) COMPACTOR_INTERVAL);
TRI_UnlockCondition(&vocbase->_compactorCondition);
}
if (state == 2) {
// server shutdown
break;
}
}
TRI_DestroyVectorPointer(&collections);
LOG_TRACE("shutting down compactor thread");
}
