static TRI_datafile_t* CreateCompactor (TRI_document_collection_t* document,
TRI_voc_fid_t fid,
TRI_voc_size_t maximalSize) {
TRI_collection_t* collection;
TRI_datafile_t* compactor;
collection = &document->base.base;
// reserve room for one additional entry
if (TRI_ReserveVectorPointer(&collection->_compactors, 1) != TRI_ERROR_NO_ERROR) {
// could not get memory, exit early
return NULL;
}
TRI_LOCK_JOURNAL_ENTRIES_DOC_COLLECTION(document);
compactor = TRI_CreateCompactorPrimaryCollection(&document->base, fid, maximalSize);
if (compactor != NULL) {
int res = TRI_PushBackVectorPointer(&collection->_compactors, compactor);
// we have reserved space before, so we can be sure the push succeeds
assert(res == TRI_ERROR_NO_ERROR);
}
// we still must wake up the other thread from time to time, otherwise we'll deadlock
TRI_BROADCAST_JOURNAL_ENTRIES_DOC_COLLECTION(document);
TRI_UNLOCK_JOURNAL_ENTRIES_DOC_COLLECTION(document);
return compactor;
}
static bool CheckCompactorDocumentCollection (TRI_document_collection_t* sim) {
TRI_collection_t* base;
TRI_datafile_t* compactor;
bool worked;
size_t i;
size_t n;
worked = false;
base = &sim->base.base;
// .............................................................................
// the only thread MODIFYING the _compactor variable is this thread,
// therefore no locking is required to access the _compactors
// .............................................................................
n = base->_compactors._length;
for (i = 0; i < n;) {
compactor = base->_compactors._buffer[i];
if (compactor->_full) {
worked = true;
LOG_DEBUG("closing full compactor '%s'", compactor->_filename);
TRI_LOCK_JOURNAL_ENTRIES_DOC_COLLECTION(sim);
TRI_CloseCompactorPrimaryCollection(&sim->base, i);
TRI_UNLOCK_JOURNAL_ENTRIES_DOC_COLLECTION(sim);
n = base->_compactors._length;
i = 0;
}
else {
++i;
}
}
if (base->_compactors._length == 0) {
TRI_LOCK_JOURNAL_ENTRIES_DOC_COLLECTION(sim);
compactor = TRI_CreateCompactorPrimaryCollection(&sim->base);
if (compactor != NULL) {
worked = true;
LOG_DEBUG("created new compactor '%s'", compactor->_filename);
TRI_BROADCAST_JOURNAL_ENTRIES_DOC_COLLECTION(sim);
}
else {
// an error occurred when creating the compactor file
LOG_ERROR("could not create compactor file");
}
TRI_UNLOCK_JOURNAL_ENTRIES_DOC_COLLECTION(sim);
}
return worked;
}
