bff2e53fb3
* Renaming classes to be more descriptive. * Changing smart pointers to reflect strict ownership model. * Adding pointers to facilitate future resource swapping. * Remove renderer-side dependency on blob_data.h This patch makes all of the far-reaching changes that effect everyone that uses the blob storage context. Subsequent changes should only effect the blob infrastructure. https://bit.ly/AutoBlobToDisk BUG=375297 Review URL: https://codereview.chromium.org/810403004 Cr-Commit-Position: refs/heads/master@{#312800}
75 lines
2.5 KiB
C++
75 lines
2.5 KiB
C++
// Copyright 2014 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.
|
|
|
|
#ifndef CONTENT_BROWSER_FILEAPI_STORAGE_HOST_H_
|
|
#define CONTENT_BROWSER_FILEAPI_STORAGE_HOST_H_
|
|
|
|
#include <map>
|
|
#include <set>
|
|
#include <string>
|
|
|
|
#include "base/compiler_specific.h"
|
|
#include "base/memory/weak_ptr.h"
|
|
#include "content/common/content_export.h"
|
|
#include "storage/common/data_element.h"
|
|
|
|
class GURL;
|
|
|
|
namespace storage {
|
|
class BlobDataHandle;
|
|
class BlobStorageHost;
|
|
class BlobStorageContext;
|
|
}
|
|
|
|
namespace content {
|
|
|
|
// This class handles the logistics of blob storage for a single child process.
|
|
// There is one instance per child process. When the child process
|
|
// terminates all blob references attibutable to that process go away upon
|
|
// destruction of the instance. The class is single threaded and should
|
|
// only be used on the IO thread.
|
|
class CONTENT_EXPORT BlobStorageHost {
|
|
public:
|
|
explicit BlobStorageHost(storage::BlobStorageContext* context);
|
|
~BlobStorageHost();
|
|
|
|
// Methods to support the IPC message protocol.
|
|
// A false return indicates a problem with the inputs
|
|
// like a non-existent or pre-existent uuid or url.
|
|
bool StartBuildingBlob(const std::string& uuid) WARN_UNUSED_RESULT;
|
|
bool AppendBlobDataItem(const std::string& uuid,
|
|
const storage::DataElement& data_item)
|
|
WARN_UNUSED_RESULT;
|
|
bool CancelBuildingBlob(const std::string& uuid) WARN_UNUSED_RESULT;
|
|
bool FinishBuildingBlob(const std::string& uuid,
|
|
const std::string& type) WARN_UNUSED_RESULT;
|
|
bool IncrementBlobRefCount(const std::string& uuid) WARN_UNUSED_RESULT;
|
|
bool DecrementBlobRefCount(const std::string& uuid) WARN_UNUSED_RESULT;
|
|
bool RegisterPublicBlobURL(const GURL& blob_url,
|
|
const std::string& uuid) WARN_UNUSED_RESULT;
|
|
bool RevokePublicBlobURL(const GURL& blob_url) WARN_UNUSED_RESULT;
|
|
|
|
private:
|
|
typedef std::map<std::string, int> BlobReferenceMap;
|
|
|
|
bool IsInUseInHost(const std::string& uuid);
|
|
bool IsBeingBuiltInHost(const std::string& uuid);
|
|
bool IsUrlRegisteredInHost(const GURL& blob_url);
|
|
|
|
// Collection of blob ids and a count of how many usages
|
|
// of that id are attributable to this consumer.
|
|
BlobReferenceMap blobs_inuse_map_;
|
|
|
|
// The set of public blob urls coined by this consumer.
|
|
std::set<GURL> public_blob_urls_;
|
|
|
|
base::WeakPtr<storage::BlobStorageContext> context_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(BlobStorageHost);
|
|
};
|
|
|
|
} // namespace content
|
|
|
|
#endif // CONTENT_BROWSER_FILEAPI_STORAGE_HOST_H_
|