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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef CPU_CPU_CACHE_H_
#define CPU_CPU_CACHE_H_
#include <cstdint>
#include <memory>
#include <mutex>
#include <vector>
#include "proto/cpu_profiler_data.pb.h"
namespace profiler {
class CpuCache {
public:
// Special value of argument |app_id| in method |Retrieve| indicating any app.
static const int32_t kAnyApp = -1;
// Adds |datum| to the cache.
void Add(const profiler::proto::CpuProfilerData& datum);
// Retrieves data of |app_id| with timestamps in interval (|from|, |to|].
// |app_id| being |kAnyApp| means all apps in the cache.
std::vector<profiler::proto::CpuProfilerData> Retrieve(int32_t app_id,
int64_t from,
int64_t to);
private:
// TODO: Utilize something like a circular buffer. The size is unbounded for
// now.
std::vector<profiler::proto::CpuProfilerData> cache_;
// Protects |cache_|.
std::mutex cache_mutex_;
};
} // namespace profiler
#endif // CPU_CPU_CACHE_H_
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