| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "webkit/dom_storage/dom_storage_namespace.h" |
| |
| #include "base/basictypes.h" |
| #include "base/logging.h" |
| #include "webkit/dom_storage/dom_storage_area.h" |
| #include "webkit/dom_storage/dom_storage_task_runner.h" |
| #include "webkit/dom_storage/dom_storage_types.h" |
| |
| namespace dom_storage { |
| |
| DomStorageNamespace::DomStorageNamespace( |
| const FilePath& directory, |
| DomStorageTaskRunner* task_runner) |
| : namespace_id_(kLocalStorageNamespaceId), |
| directory_(directory), |
| task_runner_(task_runner) { |
| } |
| |
| DomStorageNamespace::DomStorageNamespace( |
| int64 namespace_id, |
| DomStorageTaskRunner* task_runner) |
| : namespace_id_(namespace_id), |
| task_runner_(task_runner) { |
| DCHECK_NE(kLocalStorageNamespaceId, namespace_id); |
| } |
| |
| DomStorageNamespace::~DomStorageNamespace() { |
| } |
| |
| DomStorageArea* DomStorageNamespace::OpenStorageArea(const GURL& origin) { |
| if (AreaHolder* holder = GetAreaHolder(origin)) { |
| ++(holder->open_count_); |
| return holder->area_; |
| } |
| DomStorageArea* area = new DomStorageArea(namespace_id_, origin, |
| directory_, task_runner_); |
| areas_[origin] = AreaHolder(area, 1); |
| return area; |
| } |
| |
| void DomStorageNamespace::CloseStorageArea(DomStorageArea* area) { |
| AreaHolder* holder = GetAreaHolder(area->origin()); |
| DCHECK(holder); |
| DCHECK_EQ(holder->area_.get(), area); |
| --(holder->open_count_); |
| // TODO(michaeln): Clean up areas that aren't needed in memory anymore. |
| // The in-process-webkit based impl didn't do this either, but would be nice. |
| } |
| |
| DomStorageNamespace* DomStorageNamespace::Clone(int64 clone_namespace_id) { |
| DCHECK_NE(kLocalStorageNamespaceId, namespace_id_); |
| DCHECK_NE(kLocalStorageNamespaceId, clone_namespace_id); |
| DomStorageNamespace* clone = |
| new DomStorageNamespace(clone_namespace_id, task_runner_); |
| AreaMap::const_iterator it = areas_.begin(); |
| for (; it != areas_.end(); ++it) { |
| DomStorageArea* area = it->second.area_->ShallowCopy(clone_namespace_id); |
| clone->areas_[it->first] = AreaHolder(area, 0); |
| } |
| return clone; |
| } |
| |
| void DomStorageNamespace::DeleteOrigin(const GURL& origin) { |
| AreaHolder* holder = GetAreaHolder(origin); |
| if (holder) { |
| holder->area_->DeleteOrigin(); |
| return; |
| } |
| if (!directory_.empty()) { |
| scoped_refptr<DomStorageArea> area = |
| new DomStorageArea(namespace_id_, origin, directory_, task_runner_); |
| area->DeleteOrigin(); |
| } |
| } |
| |
| void DomStorageNamespace::PurgeMemory() { |
| if (directory_.empty()) |
| return; // We can't purge w/o backing on disk. |
| AreaMap::iterator it = areas_.begin(); |
| while (it != areas_.end()) { |
| // Leave it alone if changes are pending |
| if (it->second.area_->HasUncommittedChanges()) { |
| ++it; |
| continue; |
| } |
| |
| // If not in use, we can shut it down and remove |
| // it from our collection entirely. |
| if (it->second.open_count_ == 0) { |
| it->second.area_->Shutdown(); |
| areas_.erase(it++); |
| continue; |
| } |
| |
| // Otherwise, we can clear caches and such. |
| it->second.area_->PurgeMemory(); |
| ++it; |
| } |
| } |
| |
| void DomStorageNamespace::Shutdown() { |
| AreaMap::const_iterator it = areas_.begin(); |
| for (; it != areas_.end(); ++it) |
| it->second.area_->Shutdown(); |
| } |
| |
| |
| DomStorageNamespace::AreaHolder* |
| DomStorageNamespace::GetAreaHolder(const GURL& origin) { |
| AreaMap::iterator found = areas_.find(origin); |
| if (found == areas_.end()) |
| return NULL; |
| return &(found->second); |
| } |
| |
| // AreaHolder |
| |
| DomStorageNamespace::AreaHolder::AreaHolder() |
| : open_count_(0) { |
| } |
| |
| DomStorageNamespace::AreaHolder::AreaHolder( |
| DomStorageArea* area, int count) |
| : area_(area), open_count_(count) { |
| } |
| |
| DomStorageNamespace::AreaHolder::~AreaHolder() { |
| } |
| |
| } // namespace dom_storage |