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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/indexed_db/instance/active_blob_registry.h"
#include "base/containers/contains.h"
#include "base/functional/bind.h"
#include "base/location.h"
#include "base/task/task_runner.h"
#include "content/browser/indexed_db/indexed_db_leveldb_coding.h"
namespace content::indexed_db {
ActiveBlobRegistry::ActiveBlobRegistry(
ReportOutstandingBlobsCallback report_outstanding_blobs,
ReportUnusedBlobCallback report_unused_blob)
: report_outstanding_blobs_(std::move(report_outstanding_blobs)),
report_unused_blob_(std::move(report_unused_blob)) {}
ActiveBlobRegistry::~ActiveBlobRegistry() {}
bool ActiveBlobRegistry::MarkDatabaseDeletedAndCheckIfReferenced(
int64_t database_id) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(KeyPrefix::IsValidDatabaseId(database_id));
auto db_pair = blob_reference_tracker_.find(database_id);
if (db_pair == blob_reference_tracker_.end()) {
return false;
}
deleted_dbs_.insert(database_id);
return true;
}
bool ActiveBlobRegistry::MarkBlobInfoDeletedAndCheckIfReferenced(
int64_t database_id,
int64_t blob_number) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK_NE(blob_number, DatabaseMetaDataKey::kAllBlobsNumber);
DCHECK(KeyPrefix::IsValidDatabaseId(database_id));
auto db_pair = blob_reference_tracker_.find(database_id);
if (db_pair == blob_reference_tracker_.end()) {
return false;
}
SingleDBMap& single_db = db_pair->second;
auto iter = single_db.find(blob_number);
if (iter == single_db.end()) {
return false;
}
iter->second = BlobState::kUnlinked;
return true;
}
base::RepeatingClosure ActiveBlobRegistry::GetFinalReleaseCallback(
int64_t database_id,
int64_t blob_number) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
return base::BindRepeating(&ActiveBlobRegistry::MarkBlobInactive,
weak_factory_.GetWeakPtr(), database_id,
blob_number);
}
base::RepeatingClosure ActiveBlobRegistry::GetMarkBlobActiveCallback(
int64_t database_id,
int64_t blob_number) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
return base::BindRepeating(&ActiveBlobRegistry::MarkBlobActive,
weak_factory_.GetWeakPtr(), database_id,
blob_number);
}
void ActiveBlobRegistry::ForceShutdown() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
weak_factory_.InvalidateWeakPtrs();
blob_reference_tracker_.clear();
report_outstanding_blobs_.Reset();
report_unused_blob_.Reset();
}
void ActiveBlobRegistry::MarkBlobActive(int64_t database_id,
int64_t blob_number) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(report_outstanding_blobs_);
DCHECK(report_unused_blob_);
DCHECK(KeyPrefix::IsValidDatabaseId(database_id));
DCHECK(DatabaseMetaDataKey::IsValidBlobNumber(blob_number));
DCHECK(!base::Contains(deleted_dbs_, database_id));
bool outstanding_blobs_in_backing_store = !blob_reference_tracker_.empty();
SingleDBMap& blobs_in_db = blob_reference_tracker_[database_id];
auto iter = blobs_in_db.find(blob_number);
if (iter == blobs_in_db.end()) {
blobs_in_db[blob_number] = BlobState::kLinked;
if (!outstanding_blobs_in_backing_store) {
report_outstanding_blobs_.Run(true);
}
} else {
DCHECK(outstanding_blobs_in_backing_store);
// You can't add a reference once it's been deleted.
DCHECK(iter->second == BlobState::kLinked);
}
}
void ActiveBlobRegistry::MarkBlobInactive(int64_t database_id,
int64_t blob_number) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(report_outstanding_blobs_);
DCHECK(report_unused_blob_);
DCHECK(KeyPrefix::IsValidDatabaseId(database_id));
DCHECK(DatabaseMetaDataKey::IsValidBlobNumber(blob_number));
auto db_pair = blob_reference_tracker_.find(database_id);
if (db_pair == blob_reference_tracker_.end()) {
NOTREACHED();
}
SingleDBMap& blobs_in_db = db_pair->second;
auto blob_in_db_it = blobs_in_db.find(blob_number);
if (blob_in_db_it == blobs_in_db.end()) {
NOTREACHED();
}
bool delete_blob_in_backend = false;
auto deleted_database_it = deleted_dbs_.find(database_id);
bool db_marked_for_deletion = deleted_database_it != deleted_dbs_.end();
// Don't bother deleting the file if we're going to delete its whole
// database directory soon.
delete_blob_in_backend =
blob_in_db_it->second == BlobState::kUnlinked && !db_marked_for_deletion;
blobs_in_db.erase(blob_in_db_it);
if (blobs_in_db.empty()) {
blob_reference_tracker_.erase(db_pair);
if (db_marked_for_deletion) {
delete_blob_in_backend = true;
blob_number = DatabaseMetaDataKey::kAllBlobsNumber;
deleted_dbs_.erase(deleted_database_it);
}
}
if (delete_blob_in_backend) {
report_unused_blob_.Run(database_id, blob_number);
}
if (blob_reference_tracker_.empty()) {
report_outstanding_blobs_.Run(false);
}
}
} // namespace content::indexed_db
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