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/*
* Copyright (C) 2015 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 SIMPLE_PERF_WORKLOAD_H_
#define SIMPLE_PERF_WORKLOAD_H_
#include <sys/types.h>
#include <chrono>
#include <string>
#include <vector>
#include <base/macros.h>
class Workload {
private:
enum WorkState {
NotYetCreateNewProcess,
NotYetStartNewProcess,
Started,
Finished,
};
public:
static std::unique_ptr<Workload> CreateWorkload(const std::vector<std::string>& args);
~Workload();
bool Start();
bool IsFinished();
void WaitFinish();
pid_t GetPid() {
return work_pid_;
}
private:
Workload(const std::vector<std::string>& args)
: work_state_(NotYetCreateNewProcess),
args_(args),
work_pid_(-1),
start_signal_fd_(-1),
exec_child_fd_(-1) {
}
bool CreateNewProcess();
void WaitChildProcess(bool no_hang);
WorkState work_state_;
std::vector<std::string> args_;
pid_t work_pid_;
int start_signal_fd_; // The parent process writes 1 to start workload in the child process.
int exec_child_fd_; // The child process writes 1 to notify that execvp() failed.
DISALLOW_COPY_AND_ASSIGN(Workload);
};
#endif // SIMPLE_PERF_WORKLOAD_H_