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// Copyright (c) 2013 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 "storage/browser/blob/blob_data_handle.h"
#include "base/bind.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/sequenced_task_runner.h"
#include "storage/browser/blob/blob_data_snapshot.h"
#include "storage/browser/blob/blob_storage_context.h"
namespace storage {
BlobDataHandle::BlobDataHandleShared::BlobDataHandleShared(
const std::string& uuid,
BlobStorageContext* context,
base::SequencedTaskRunner* task_runner)
: uuid_(uuid), context_(context->AsWeakPtr()) {
context_->IncrementBlobRefCount(uuid);
}
scoped_ptr<BlobDataSnapshot>
BlobDataHandle::BlobDataHandleShared::CreateSnapshot() const {
return context_->CreateSnapshot(uuid_).Pass();
}
const std::string& BlobDataHandle::BlobDataHandleShared::uuid() const {
return uuid_;
}
BlobDataHandle::BlobDataHandleShared::~BlobDataHandleShared() {
if (context_.get())
context_->DecrementBlobRefCount(uuid_);
}
BlobDataHandle::BlobDataHandle(const std::string& uuid,
BlobStorageContext* context,
base::SequencedTaskRunner* task_runner)
: io_task_runner_(task_runner),
shared_(new BlobDataHandleShared(uuid, context, task_runner)) {
DCHECK(io_task_runner_.get());
DCHECK(io_task_runner_->RunsTasksOnCurrentThread());
}
BlobDataHandle::BlobDataHandle(const BlobDataHandle& other) {
io_task_runner_ = other.io_task_runner_;
shared_ = other.shared_;
}
BlobDataHandle::~BlobDataHandle() {
BlobDataHandleShared* raw = shared_.get();
raw->AddRef();
shared_ = nullptr;
io_task_runner_->ReleaseSoon(FROM_HERE, raw);
}
scoped_ptr<BlobDataSnapshot> BlobDataHandle::CreateSnapshot() const {
DCHECK(io_task_runner_->RunsTasksOnCurrentThread());
return shared_->CreateSnapshot().Pass();
}
const std::string& BlobDataHandle::uuid() const {
return shared_->uuid();
}
} // namespace storage
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