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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_RENDER_FRAME_HOST_PROXY_H_
#define COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_RENDER_FRAME_HOST_PROXY_H_
#include "content/public/browser/global_routing_id.h"
namespace content {
class RenderFrameHost;
} // namespace content
namespace performance_manager {
class FrameNodeImpl;
// A RenderFrameHostProxy is used to post messages out of the performance
// manager sequence that are bound for a RenderFrameHost running on the UI
// thread. The object is bound to the UI thread. A RenderFrameHostProxy is
// conceptually equivalent to a WeakPtr<RenderFrameHost>. Copy and assignment
// are explicitly allowed for this object.
class RenderFrameHostProxy {
public:
RenderFrameHostProxy();
RenderFrameHostProxy(const RenderFrameHostProxy& other);
~RenderFrameHostProxy();
RenderFrameHostProxy& operator=(const RenderFrameHostProxy& other);
// Allows resolving this proxy to the underlying RenderFrameHost. This must
// only be called on the UI thread. Returns nullptr if the RenderFrameHost
// no longer exists.
content::RenderFrameHost* Get() const;
// Returns true iff the proxy has a valid GlobalRenderFrameHostId (whose
// operator::bool returns true).
bool is_valid() const { return static_cast<bool>(global_frame_routing_id_); }
// Returns the global routing ID.
const content::GlobalRenderFrameHostId& global_frame_routing_id() const {
return global_frame_routing_id_;
}
protected:
friend class FrameNodeImpl;
explicit RenderFrameHostProxy(
const content::GlobalRenderFrameHostId& global_frame_routing_id);
private:
content::GlobalRenderFrameHostId global_frame_routing_id_;
};
} // namespace performance_manager
#endif // COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_RENDER_FRAME_HOST_PROXY_H_
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