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65 lines
1.7 KiB
65 lines
1.7 KiB
/*
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* Copyright 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <utils/Timers.h>
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#include <functional>
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namespace android::scheduler {
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class Clock {
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public:
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virtual ~Clock();
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/*
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* Returns the SYSTEM_TIME_MONOTONIC, used by testing infra to stub time.
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*/
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virtual nsecs_t now() const = 0;
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protected:
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Clock() = default;
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Clock(Clock const&) = delete;
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Clock& operator=(Clock const&) = delete;
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};
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/*
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* TimeKeeper is the interface for a single-shot timer primitive.
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*/
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class TimeKeeper : public Clock {
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public:
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virtual ~TimeKeeper();
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/*
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* Arms callback to fired when time is current based on CLOCK_MONOTONIC
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* There is only one timer, and subsequent calls will reset the callback function and the time.
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*/
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virtual void alarmAt(std::function<void()> const& callback, nsecs_t time) = 0;
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/*
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* Cancels an existing pending callback
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*/
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virtual void alarmCancel() = 0;
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virtual void dump(std::string& result) const = 0;
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protected:
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TimeKeeper(TimeKeeper const&) = delete;
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TimeKeeper& operator=(TimeKeeper const&) = delete;
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TimeKeeper() = default;
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};
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} // namespace android::scheduler
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