| /* |
| * 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() { |
| if (start_signal_fd_ != -1) { |
| close(start_signal_fd_); |
| } |
| if (exec_child_fd_ != -1) { |
| close(exec_child_fd_); |
| } |
| } |
| |
| bool Start(); |
| bool IsFinished(); |
| void WaitFinish(); |
| pid_t GetWorkPid() { |
| 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_ |