1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CONTENT_BROWSER_CROSS_SITE_REQUEST_MANAGER_H_ 6 #define CONTENT_BROWSER_CROSS_SITE_REQUEST_MANAGER_H_ 7 8 #include <set> 9 #include <utility> 10 11 #include "base/basictypes.h" 12 #include "base/synchronization/lock.h" 13 14 template <typename T> struct DefaultSingletonTraits; 15 16 namespace content { 17 18 // CrossSiteRequestManager is used to handle bookkeeping for cross-site 19 // requests and responses between the UI and IO threads. Such requests involve 20 // a transition from one RenderViewHost to another within WebContentsImpl, and 21 // involve coordination with ResourceDispatcherHost. 22 // 23 // CrossSiteRequestManager is a singleton that may be used on any thread. 24 // 25 class CrossSiteRequestManager { 26 public: 27 // Returns the singleton instance. 28 static CrossSiteRequestManager* GetInstance(); 29 30 // Returns whether the RenderViewHost specified by the given IDs currently 31 // has a pending cross-site request. If so, we will have to delay the 32 // response until the previous RenderViewHost runs its onunload handler. 33 // Called by ResourceDispatcherHost on the IO thread and RenderViewHost on 34 // the UI thread. 35 bool HasPendingCrossSiteRequest(int renderer_id, int render_view_id); 36 37 // Sets whether the RenderViewHost specified by the given IDs currently has a 38 // pending cross-site request. Called by RenderViewHost on the UI thread. 39 void SetHasPendingCrossSiteRequest(int renderer_id, 40 int render_view_id, 41 bool has_pending); 42 43 private: 44 friend struct DefaultSingletonTraits<CrossSiteRequestManager>; 45 typedef std::set<std::pair<int, int> > RenderViewSet; 46 47 CrossSiteRequestManager(); 48 ~CrossSiteRequestManager(); 49 50 // You must acquire this lock before reading or writing any members of this 51 // class. You must not block while holding this lock. 52 base::Lock lock_; 53 54 // Set of (render_process_host_id, render_view_id) pairs of all 55 // RenderViewHosts that have pending cross-site requests. Used to pass 56 // information about the RenderViewHosts between the UI and IO threads. 57 RenderViewSet pending_cross_site_views_; 58 59 DISALLOW_COPY_AND_ASSIGN(CrossSiteRequestManager); 60 }; 61 62 } // namespace content 63 64 #endif // CONTENT_BROWSER_CROSS_SITE_REQUEST_MANAGER_H_ 65
