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// Copyright 2019 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_PROCESS_HOST_PROXY_H_
#define COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_RENDER_PROCESS_HOST_PROXY_H_
#include "components/performance_manager/public/render_process_host_id.h"
#include "content/public/browser/child_process_host.h"
namespace content {
class RenderProcessHost;
} // namespace content
namespace performance_manager {
// A RenderProcessHostProxy is used to post messages out of the performance
// manager sequence that are bound for a RenderProcessHost running on the UI
// thread. The object is bound to the UI thread. A RenderProcessHostProxy is
// conceputally equivalent to a WeakPtr<RenderProcessHost>. Copy and assignment
// are explicitly allowed for this object.
class RenderProcessHostProxy {
public:
RenderProcessHostProxy();
RenderProcessHostProxy(const RenderProcessHostProxy& other);
~RenderProcessHostProxy();
RenderProcessHostProxy& operator=(const RenderProcessHostProxy& other);
// Allows resolving this proxy to the underlying RenderProcessHost. This must
// only be called on the UI thread. Returns nullptr if the RenderProcessHost
// no longer exists.
content::RenderProcessHost* Get() const;
// Returns true iff the proxy has a valid RenderProcessHostId (not 0 or
// ChildProcessHost::kInvalidUniqueId).
bool is_valid() const { return !render_process_host_id_.is_null(); }
// Returns the routing id of the render process (from
// RenderProcessHost::GetID()).
RenderProcessHostId render_process_host_id() const {
return render_process_host_id_;
}
static RenderProcessHostProxy CreateForTesting(
RenderProcessHostId render_process_host_id);
protected:
friend class RenderProcessUserData;
explicit RenderProcessHostProxy(RenderProcessHostId render_process_host_id);
private:
RenderProcessHostId render_process_host_id_;
};
} // namespace performance_manager
#endif // COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_RENDER_PROCESS_HOST_PROXY_H_
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