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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 "webkit/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 "webkit/browser/blob/blob_storage_context.h"
#include "webkit/common/blob/blob_data.h"
namespace webkit_blob {
BlobDataHandle::BlobDataHandleShared::BlobDataHandleShared(
BlobData* blob_data,
BlobStorageContext* context,
base::SequencedTaskRunner* task_runner)
: blob_data_(blob_data),
context_(context->AsWeakPtr()) {
context_->IncrementBlobRefCount(blob_data->uuid());
}
BlobData* BlobDataHandle::BlobDataHandleShared::data() const {
return blob_data_;
}
const std::string& BlobDataHandle::BlobDataHandleShared::uuid() const {
return blob_data_->uuid();
}
BlobDataHandle::BlobDataHandleShared::~BlobDataHandleShared() {
if (context_.get())
context_->DecrementBlobRefCount(blob_data_->uuid());
}
BlobDataHandle::BlobDataHandle(BlobData* blob_data,
BlobStorageContext* context,
base::SequencedTaskRunner* task_runner)
: io_task_runner_(task_runner),
shared_(new BlobDataHandleShared(blob_data, context, task_runner)) {
DCHECK(io_task_runner_);
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_ = 0;
io_task_runner_->ReleaseSoon(FROM_HERE, raw);
}
BlobData* BlobDataHandle::data() const {
DCHECK(io_task_runner_->RunsTasksOnCurrentThread());
return shared_->data();
}
std::string BlobDataHandle::uuid() const {
return shared_->uuid();
}
} // namespace webkit_blob
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