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// Copyright 2023 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_BROWSER_CHILD_PROCESS_HOST_PROXY_H_
#define COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_BROWSER_CHILD_PROCESS_HOST_PROXY_H_
#include "components/performance_manager/public/browser_child_process_host_id.h"
#include "content/public/browser/child_process_host.h"
namespace content {
class BrowserChildProcessHost;
} // namespace content
namespace performance_manager {
// A BrowserChildProcessHostProxy is used to post messages out of the
// performance manager sequence that are bound for a BrowserChildProcessHost
// running on the UI thread. The object is bound to the UI thread. A
// BrowserChildProcessHostProxy is conceputally equivalent to a
// WeakPtr<BrowserChildProcessHost>. Copy and assignment are explicitly allowed
// for this object.
class BrowserChildProcessHostProxy {
public:
BrowserChildProcessHostProxy();
BrowserChildProcessHostProxy(const BrowserChildProcessHostProxy& other);
~BrowserChildProcessHostProxy();
BrowserChildProcessHostProxy& operator=(
const BrowserChildProcessHostProxy& other);
// Allows resolving this proxy to the underlying BrowserChildProcessHost. This
// must only be called on the UI thread. Returns nullptr if the
// BrowserChildProcessHost no longer exists.
content::BrowserChildProcessHost* Get() const;
// Returns true iff the proxy has a valid BrowserChildProcessHostId (not 0 or
// ChildProcessHost::kInvalidUniqueId).
bool is_valid() const { return !browser_child_process_host_id_.is_null(); }
// Returns the routing id of the BrowserChildProcessHost (from
// BrowserChildProcessHost::GetID).
BrowserChildProcessHostId browser_child_process_host_id() const {
return browser_child_process_host_id_;
}
static BrowserChildProcessHostProxy CreateForTesting(
BrowserChildProcessHostId browser_child_process_host_id);
protected:
friend class BrowserChildProcessWatcher;
explicit BrowserChildProcessHostProxy(
BrowserChildProcessHostId browser_child_process_host_id);
private:
BrowserChildProcessHostId browser_child_process_host_id_ =
BrowserChildProcessHostId(content::ChildProcessHost::kInvalidUniqueID);
};
} // namespace performance_manager
#endif // COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_BROWSER_CHILD_PROCESS_HOST_PROXY_H_
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