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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_EXECUTION_CONTEXT_PRIORITY_ROOT_VOTE_OBSERVER_H_
#define COMPONENTS_PERFORMANCE_MANAGER_EXECUTION_CONTEXT_PRIORITY_ROOT_VOTE_OBSERVER_H_
#include "components/performance_manager/public/execution_context_priority/execution_context_priority.h"
namespace performance_manager {
namespace execution_context_priority {
// The RootVoteObserver acts as the root node of a hierarchy of execution
// context priority voters. It is responsible for taking aggregated votes and
// applying them to the actual nodes in a graph.
class RootVoteObserver : public VoteObserver {
public:
RootVoteObserver();
~RootVoteObserver() override;
RootVoteObserver(const RootVoteObserver&) = delete;
RootVoteObserver& operator=(const RootVoteObserver&) = delete;
// Issues a voting channel (registers the sole incoming voter).
VotingChannel GetVotingChannel();
protected:
// VoteObserver implementation:
void OnVoteSubmitted(VoterId voter_id,
const ExecutionContext* execution_context,
const Vote& vote) override;
void OnVoteChanged(VoterId voter_id,
const ExecutionContext* context,
const Vote& new_vote) override;
void OnVoteInvalidated(VoterId voter_id,
const ExecutionContext* context) override;
// Provides the VotingChannel to our input voter.
VotingChannelFactory voting_channel_factory_{this};
// The ID of the only voting channel we've vended.
VoterId voter_id_;
};
} // namespace execution_context_priority
} // namespace performance_manager
#endif // COMPONENTS_PERFORMANCE_MANAGER_EXECUTION_CONTEXT_PRIORITY_ROOT_VOTE_OBSERVER_H_
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