StatusWith<RecordData> KVRecordStore::updateWithDamages( OperationContext* txn,
const RecordId& id,
const RecordData& oldRec,
const char* damageSource,
const mutablebson::DamageVector& damages ) {
const KeyString key(id);
const Slice oldValue(oldRec.data(), oldRec.size());
const KVUpdateWithDamagesMessage message(damageSource, damages);
// updateWithDamages can't change the number or size of records, so we don't need to update
// stats.
const Status s = _db->update(txn, Slice::of(key), oldValue, message);
if (!s.isOK()) {
return StatusWith<RecordData>(s);
}
// We also need to reach in and screw with the old doc's data so that the update system gets
// the new image, because the update system is assuming mmapv1's behavior. Sigh.
for (mutablebson::DamageVector::const_iterator it = damages.begin(); it != damages.end(); it++) {
const mutablebson::DamageEvent &event = *it;
invariant(event.targetOffset + event.size < static_cast<uint32_t>(oldRec.size()));
std::copy(damageSource + event.sourceOffset, damageSource + event.sourceOffset + event.size,
/* eek */
const_cast<char *>(oldRec.data()) + event.targetOffset);
}
return StatusWith<RecordData>(oldRec);
}
Status HeapRecordStore::updateWithDamages( OperationContext* txn,
const DiskLoc& loc,
const RecordData& oldRec,
const char* damageSource,
const mutablebson::DamageVector& damages ) {
HeapRecord* oldRecord = recordFor( loc );
const int len = oldRecord->size;
HeapRecord newRecord(len);
memcpy(newRecord.data.get(), oldRecord->data.get(), len);
txn->recoveryUnit()->registerChange(new RemoveChange(_data, loc, *oldRecord));
*oldRecord = newRecord;
cappedDeleteAsNeeded(txn);
char* root = newRecord.data.get();
mutablebson::DamageVector::const_iterator where = damages.begin();
const mutablebson::DamageVector::const_iterator end = damages.end();
for( ; where != end; ++where ) {
const char* sourcePtr = damageSource + where->sourceOffset;
char* targetPtr = root + where->targetOffset;
std::memcpy(targetPtr, sourcePtr, where->size);
}
*oldRecord = newRecord;
return Status::OK();
}
StatusWith<RecordData> EphemeralForTestRecordStore::updateWithDamages(
OperationContext* opCtx,
const RecordId& loc,
const RecordData& oldRec,
const char* damageSource,
const mutablebson::DamageVector& damages) {
stdx::lock_guard<stdx::recursive_mutex> lock(_data->recordsMutex);
EphemeralForTestRecord* oldRecord = recordFor(loc);
const int len = oldRecord->size;
EphemeralForTestRecord newRecord(len);
memcpy(newRecord.data.get(), oldRecord->data.get(), len);
opCtx->recoveryUnit()->registerChange(new RemoveChange(opCtx, _data, loc, *oldRecord));
*oldRecord = newRecord;
cappedDeleteAsNeeded_inlock(opCtx);
char* root = newRecord.data.get();
mutablebson::DamageVector::const_iterator where = damages.begin();
const mutablebson::DamageVector::const_iterator end = damages.end();
for (; where != end; ++where) {
const char* sourcePtr = damageSource + where->sourceOffset;
char* targetPtr = root + where->targetOffset;
std::memcpy(targetPtr, sourcePtr, where->size);
}
*oldRecord = newRecord;
return newRecord.toRecordData();
}
Status HeapRecordStore::updateWithDamages( OperationContext* txn,
const DiskLoc& loc,
const char* damangeSource,
const mutablebson::DamageVector& damages ) {
HeapRecord* rec = recordFor( loc );
char* root = rec->data();
// All updates were in place. Apply them via durability and writing pointer.
mutablebson::DamageVector::const_iterator where = damages.begin();
const mutablebson::DamageVector::const_iterator end = damages.end();
for( ; where != end; ++where ) {
const char* sourcePtr = damangeSource + where->sourceOffset;
char* targetPtr = root + where->targetOffset;
std::memcpy(targetPtr, sourcePtr, where->size);
}
return Status::OK();
}
StatusWith<RecordData> RecordStoreV1Base::updateWithDamages(
OperationContext* txn,
const RecordId& loc,
const RecordData& oldRec,
const char* damageSource,
const mutablebson::DamageVector& damages) {
MmapV1RecordHeader* rec = recordFor(DiskLoc::fromRecordId(loc));
char* root = rec->data();
// All updates were in place. Apply them via durability and writing pointer.
mutablebson::DamageVector::const_iterator where = damages.begin();
const mutablebson::DamageVector::const_iterator end = damages.end();
for (; where != end; ++where) {
const char* sourcePtr = damageSource + where->sourceOffset;
void* targetPtr = txn->recoveryUnit()->writingPtr(root + where->targetOffset, where->size);
std::memcpy(targetPtr, sourcePtr, where->size);
}
return rec->toRecordData();
}
