IDBObserver: Lifetime Management: Adding Observer

content/browser/indexed_db/indexed_db_dispatcher_host.h

 // 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.
 
 #ifndef CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_DISPATCHER_HOST_H_
 #define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_DISPATCHER_HOST_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 156 matching lines @@
         const IndexedDBHostMsg_DatabaseCreateObjectStore_Params& params);
     void OnDeleteObjectStore(int32_t ipc_database_id,
                              int64_t transaction_id,
                              int64_t object_store_id);
     void OnCreateTransaction(
         const IndexedDBHostMsg_DatabaseCreateTransaction_Params&);
     void OnClose(int32_t ipc_database_id);
     void OnVersionChangeIgnored(int32_t ipc_database_id);
     void OnDestroyed(int32_t ipc_database_id);
 
+    void OnObserve(int32_t ipc_thread_id,
+                   int32_t ipc_database_id,
+                   int64_t transaction_id,
+                   int32_t observer_id);
+    void OnUnobserve(int32_t ipc_thread_id,
+                     int32_t ipc_database_id,
+                     std::vector<int32_t> remove_observers);
     void OnGet(const IndexedDBHostMsg_DatabaseGet_Params& params);
     void OnGetAll(const IndexedDBHostMsg_DatabaseGetAll_Params& params);
     // OnPutWrapper starts on the IO thread so that it can grab BlobDataHandles
     // before posting to the IDB TaskRunner for the rest of the job.
     void OnPutWrapper(const IndexedDBHostMsg_DatabasePut_Params& params);
     void OnPut(const IndexedDBHostMsg_DatabasePut_Params& params,
                std::vector<storage::BlobDataHandle*> handles);
     void OnSetIndexKeys(
         const IndexedDBHostMsg_DatabaseSetIndexKeys_Params& params);
     void OnSetIndexesReady(int32_t ipc_database_id,
@@ skipping 16 matching lines @@
                        int64_t object_store_id,
                        int64_t index_id);
 
     void OnAbort(int32_t ipc_database_id, int64_t transaction_id);
     void OnCommit(int32_t ipc_database_id, int64_t transaction_id);
     void OnGotUsageAndQuotaForCommit(int32_t ipc_database_id,
                                      int64_t transaction_id,
                                      storage::QuotaStatusCode status,
                                      int64_t usage,
                                      int64_t quota);
+    int64_t GenerateObserverAndThreadId(int32_t observer_id,
+                                        int32_t ipc_thread_id);
+    std::vector<int64_t> RemoveObservers(std::vector<int32_t> remove_observers,
+                                         int32_t ipc_thread_id);
 
     IndexedDBDispatcherHost* parent_;
     IDMap<IndexedDBConnection, IDMapOwnPointer> map_;
     WebIDBObjectIDToOriginMap database_origin_map_;
     TransactionIDToSizeMap transaction_size_map_;
     TransactionIDToOriginMap transaction_origin_map_;
     TransactionIDToDatabaseIDMap transaction_database_map_;
+    std::vector<std::pair<int32_t, int64_t>> observers_;
 
     // Weak pointers are used when an asynchronous quota request is made, in
     // case the dispatcher is torn down before the response returns.
     base::WeakPtrFactory<DatabaseDispatcherHost> weak_factory_;
 
    private:
     DISALLOW_COPY_AND_ASSIGN(DatabaseDispatcherHost);
   };
 
   class CursorDispatcherHost {
@@ skipping 62 matching lines @@
   scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
   net::URLRequestContext* request_context_;
   scoped_refptr<IndexedDBContextImpl> indexed_db_context_;
   scoped_refptr<ChromeBlobStorageContext> blob_storage_context_;
 
   BlobDataHandleMap blob_data_handle_map_;
 
   // Only access on IndexedDB thread.
   std::unique_ptr<DatabaseDispatcherHost> database_dispatcher_host_;
   std::unique_ptr<CursorDispatcherHost> cursor_dispatcher_host_;
-
   // Used to set file permissions for blob storage.
   int ipc_process_id_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(IndexedDBDispatcherHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_DISPATCHER_HOST_H_