| // 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_ |