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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 <functional>
#include <string>
#include <vector>
#include <android-base/macros.h>
namespace simpleperf {
class Workload {
private:
enum WorkState {
NotYetCreateNewProcess,
NotYetStartNewProcess,
Started,
Finished,
};
public:
static std::unique_ptr<Workload> CreateWorkload(const std::vector<std::string>& args);
static std::unique_ptr<Workload> CreateWorkload(const std::function<void()>& function);
static bool RunCmd(const std::vector<std::string>& args, bool report_error = true);
~Workload();
bool SetCpuAffinity(int cpu);
bool Start();
bool IsStarted() { return work_state_ == Started; }
pid_t GetPid() { return work_pid_; }
bool WaitChildProcess(bool wait_forever, int* exit_code);
// Set the function used to kill the workload process in ~Workload().
void SetKillFunction(const std::function<void(pid_t)>& kill_function) {
kill_function_ = kill_function;
}
private:
explicit Workload(const std::vector<std::string>& args, const std::function<void()>& function);
bool CreateNewProcess();
void ChildProcessFn(int start_signal_fd, int exec_child_fd);
bool WaitChildProcess(bool wait_forever, bool is_child_killed, int* exit_code);
WorkState work_state_;
// The child process either executes child_proc_args or run child_proc_function.
std::vector<std::string> child_proc_args_;
std::function<void()> child_proc_function_;
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.
std::function<void(pid_t)> kill_function_;
DISALLOW_COPY_AND_ASSIGN(Workload);
};
} // namespace simpleperf
#endif // SIMPLE_PERF_WORKLOAD_H_
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