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57874cab33
Improve structure of the module sys. Problems within this module prevents from linking others. Signed-off-by: Marcin Smoczyński <smoczynski.marcin@gmail.com>
44 lines
1.7 KiB
C++
44 lines
1.7 KiB
C++
// Copyright (c) 2017-2021, Mudita Sp. z.o.o. All rights reserved.
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// For licensing, see https://github.com/mudita/MuditaOS/LICENSE.md
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#pragma once
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#include <Service/Service.hpp>
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#include <bsp/common.hpp>
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#include <string>
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#include <functional>
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namespace sys
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{
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/// Each sentinel manages the requests, i.e. when it is needed it sends messages to CpuGovernor with the required
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/// minimum CPU frequency to perform the task (e.g. screen redraw). Furthermore, every sentinel is informed
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/// immediately after changing the frequency. This allows it to invoke a callback to the service to update their
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/// resources (e.g. PWM filling). Every sentinel must register itself on startup to CpuGovernor by sending
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/// "SentinelRegistrationMessage".
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class CpuSentinel
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{
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public:
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explicit CpuSentinel(std::string name,
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sys::Service *service,
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std::function<void(bsp::CpuFrequencyHz)> callback = nullptr);
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~CpuSentinel() = default;
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[[nodiscard]] auto GetName() const noexcept -> std::string;
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void HoldMinimumFrequency(bsp::CpuFrequencyHz frequencyToHold);
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void ReleaseMinimumFrequency();
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void CpuFrequencyHasChanged(bsp::CpuFrequencyHz newFrequency);
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protected:
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const std::string name;
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bsp::CpuFrequencyHz currentFrequencyToHold{bsp::CpuFrequencyHz::Level_1};
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sys::Service *owner{nullptr};
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/// function called from the PowerManager context
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/// to update resources immediately
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/// critical section or mutex support necessary
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std::function<void(bsp::CpuFrequencyHz)> callback;
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};
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} // namespace sys
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