d1ab8cd588
hardware/google/pixel/power-libperfmgr from android11-release Signed-off-by: Subhajeet Muhuri <subhajeet.muhuri@gmail.com>
104 lines
3.9 KiB
C++
104 lines
3.9 KiB
C++
/*
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* Copyright (C) 2017 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 specic language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_LIBPERFMGR_NODELOOPERTHREAD_H_
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#define ANDROID_LIBPERFMGR_NODELOOPERTHREAD_H_
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#include <utils/Thread.h>
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#include <cstddef>
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#include <memory>
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#include <string>
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#include <utility>
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#include <vector>
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#include "perfmgr/Node.h"
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namespace android {
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namespace perfmgr {
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// The NodeAction specifies the sysfs node, the value to be assigned, and the
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// timeout for this action:
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struct NodeAction {
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NodeAction(std::size_t node_index, std::size_t value_index,
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std::chrono::milliseconds timeout_ms)
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: node_index(node_index),
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value_index(value_index),
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timeout_ms(timeout_ms) {}
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std::size_t node_index;
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std::size_t value_index;
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std::chrono::milliseconds timeout_ms; // 0ms for forever
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};
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// The NodeLooperThread is responsible for managing each of the sysfs nodes
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// specified in the configuration. At initialization, the NodeLooperThrea holds
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// a vector containing the nodes defined in the configuration. The NodeManager
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// gets powerhint requests and cancellations from the HintManager, maintains
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// state about the current set of powerhint requests on each sysfs node, and
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// decides how to apply the requests. The NodeLooperThread contains a ThreadLoop
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// to maintain the sysfs nodes, and that thread is woken up both to handle
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// powerhint requests and when the timeout expires for an in-progress powerhint.
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class NodeLooperThread : public ::android::Thread {
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public:
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explicit NodeLooperThread(std::vector<std::unique_ptr<Node>> nodes)
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: Thread(false), nodes_(std::move(nodes)) {}
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virtual ~NodeLooperThread() { Stop(); }
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// Need call Stop() as the threadloop will hold a strong pointer
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// itself and wait for Condition fired or timeout (60s) before
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// the out looper can call deconstructor to Stop() thread
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void Stop();
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// Return true when successfully adds request from actions for the hint_type
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// in each individual node. Return false if any of the actions has either
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// invalid node index or value index.
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bool Request(const std::vector<NodeAction>& actions,
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const std::string& hint_type);
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// Return when successfully cancels request from actions for the hint_type
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// in each individual node. Return false if any of the actions has invalid
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// node index.
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bool Cancel(const std::vector<NodeAction>& actions,
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const std::string& hint_type);
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// Dump all nodes to fd
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void DumpToFd(int fd);
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// Return true when successfully started the looper thread
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bool Start();
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private:
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NodeLooperThread(NodeLooperThread const&) = delete;
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void operator=(NodeLooperThread const&) = delete;
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bool threadLoop() override;
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static constexpr auto kMaxUpdatePeriod = std::chrono::milliseconds::max();
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std::vector<std::unique_ptr<Node>> nodes_; // parsed from Config
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// conditional variable from C++ standard library can be affected by wall
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// time change as it is using CLOCK_REAL (b/35756266). The component should
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// not be impacted by wall time, thus need use Android specific Condition
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// class for waking up threadloop.
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::android::Condition wake_cond_;
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// lock to protect nodes_
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::android::Mutex lock_;
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};
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} // namespace perfmgr
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} // namespace android
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#endif // ANDROID_LIBPERFMGR_NODELOOPERTHREAD_H_
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