e198683d04
We no longer need to process SwapOut messages on the IO thread, and we no longer pass browser-internal request IDs to the renderer to be echoed back. This paves the way to support transferring navigations using CrossSiteResourceHandler. BUG=238331 TEST=No behavior change. Review URL: https://chromiumcodereview.appspot.com/15682009 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@206354 0039d316-1c4b-4281-b951-d872f2087c98
65 lines
2.4 KiB
C++
65 lines
2.4 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef CONTENT_BROWSER_CROSS_SITE_REQUEST_MANAGER_H_
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#define CONTENT_BROWSER_CROSS_SITE_REQUEST_MANAGER_H_
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#include <set>
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#include <utility>
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#include "base/basictypes.h"
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#include "base/synchronization/lock.h"
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template <typename T> struct DefaultSingletonTraits;
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namespace content {
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// CrossSiteRequestManager is used to handle bookkeeping for cross-site
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// requests and responses between the UI and IO threads. Such requests involve
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// a transition from one RenderViewHost to another within WebContentsImpl, and
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// involve coordination with ResourceDispatcherHost.
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//
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// CrossSiteRequestManager is a singleton that may be used on any thread.
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//
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class CrossSiteRequestManager {
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public:
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// Returns the singleton instance.
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static CrossSiteRequestManager* GetInstance();
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// Returns whether the RenderViewHost specified by the given IDs currently
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// has a pending cross-site request. If so, we will have to delay the
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// response until the previous RenderViewHost runs its onunload handler.
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// Called by ResourceDispatcherHost on the IO thread and RenderViewHost on
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// the UI thread.
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bool HasPendingCrossSiteRequest(int renderer_id, int render_view_id);
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// Sets whether the RenderViewHost specified by the given IDs currently has a
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// pending cross-site request. Called by RenderViewHost on the UI thread.
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void SetHasPendingCrossSiteRequest(int renderer_id,
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int render_view_id,
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bool has_pending);
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private:
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friend struct DefaultSingletonTraits<CrossSiteRequestManager>;
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typedef std::set<std::pair<int, int> > RenderViewSet;
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CrossSiteRequestManager();
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~CrossSiteRequestManager();
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// You must acquire this lock before reading or writing any members of this
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// class. You must not block while holding this lock.
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base::Lock lock_;
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// Set of (render_process_host_id, render_view_id) pairs of all
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// RenderViewHosts that have pending cross-site requests. Used to pass
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// information about the RenderViewHosts between the UI and IO threads.
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RenderViewSet pending_cross_site_views_;
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DISALLOW_COPY_AND_ASSIGN(CrossSiteRequestManager);
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};
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} // namespace content
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#endif // CONTENT_BROWSER_CROSS_SITE_REQUEST_MANAGER_H_
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