90 lines
2.7 KiB
C++
90 lines
2.7 KiB
C++
/*
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* Copyright (C) 2014 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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#ifndef ART_RUNTIME_GC_TASK_PROCESSOR_H_
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#define ART_RUNTIME_GC_TASK_PROCESSOR_H_
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#include <memory>
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#include <set>
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#include "base/mutex.h"
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#include "runtime_globals.h"
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#include "thread_pool.h"
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namespace art {
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namespace gc {
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class HeapTask : public SelfDeletingTask {
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public:
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explicit HeapTask(uint64_t target_run_time) : target_run_time_(target_run_time) {
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}
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uint64_t GetTargetRunTime() const {
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return target_run_time_;
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}
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private:
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// Update the updated_target_run_time_, the task processor will re-insert the task when it is
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// popped and update the target_run_time_.
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void SetTargetRunTime(uint64_t new_target_run_time) {
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target_run_time_ = new_target_run_time;
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}
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// Time in ns at which we want the task to run.
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uint64_t target_run_time_;
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friend class TaskProcessor;
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DISALLOW_IMPLICIT_CONSTRUCTORS(HeapTask);
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};
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// Used to process GC tasks (heap trim, heap transitions, concurrent GC).
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class TaskProcessor {
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public:
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TaskProcessor();
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virtual ~TaskProcessor();
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void AddTask(Thread* self, HeapTask* task) REQUIRES(!lock_);
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HeapTask* GetTask(Thread* self) REQUIRES(!lock_);
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void Start(Thread* self) REQUIRES(!lock_);
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// Stop tells the RunAllTasks to finish up the remaining tasks as soon as
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// possible then return.
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void Stop(Thread* self) REQUIRES(!lock_);
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void RunAllTasks(Thread* self) REQUIRES(!lock_);
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bool IsRunning() const REQUIRES(!lock_);
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void UpdateTargetRunTime(Thread* self, HeapTask* target_time, uint64_t new_target_time)
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REQUIRES(!lock_);
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Thread* GetRunningThread() const REQUIRES(!lock_);
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private:
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class CompareByTargetRunTime {
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public:
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bool operator()(const HeapTask* a, const HeapTask* b) const {
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return a->GetTargetRunTime() < b->GetTargetRunTime();
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}
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};
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mutable Mutex lock_ DEFAULT_MUTEX_ACQUIRED_AFTER;
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ConditionVariable cond_ GUARDED_BY(lock_);
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bool is_running_ GUARDED_BY(lock_);
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std::multiset<HeapTask*, CompareByTargetRunTime> tasks_ GUARDED_BY(lock_);
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Thread* running_thread_ GUARDED_BY(lock_);
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DISALLOW_COPY_AND_ASSIGN(TaskProcessor);
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};
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} // namespace gc
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} // namespace art
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#endif // ART_RUNTIME_GC_TASK_PROCESSOR_H_
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