upload android base code part6

android/system/extras/simpleperf/InplaceSamplerClient.h

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2017 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_INPLACE_SAMPLER_CLIENT_H_
+#define SIMPLE_PERF_INPLACE_SAMPLER_CLIENT_H_
+
+#include <memory>
+#include <set>
+#include <vector>
+
+#include "event_attr.h"
+#include "record.h"
+#include "UnixSocket.h"
+
+class InplaceSamplerClient {
+ public:
+  static std::unique_ptr<InplaceSamplerClient> Create(const perf_event_attr& attr, pid_t pid,
+                                                      const std::set<pid_t>& tids);
+  uint64_t Id() const;
+  bool IsClosed() {
+    return conn_->IsClosed();
+  }
+  bool StartPolling(IOEventLoop& loop, const std::function<bool(Record*)>& record_callback,
+                    const std::function<bool()>& close_callback);
+  bool StopProfiling(IOEventLoop& loop, const std::function<bool()>& close_callback);
+
+ private:
+  InplaceSamplerClient(const perf_event_attr& attr, pid_t pid, const std::set<pid_t>& tids);
+  bool ConnectServer();
+  bool SendStartProfilingMessage();
+  bool HandleMessage(const UnixSocketMessage& msg);
+
+  const perf_event_attr attr_;
+  const pid_t pid_;
+  const std::set<pid_t> tids_;
+  uint32_t sample_freq_;
+  std::unique_ptr<UnixSocketConnection> conn_;
+  std::function<bool(Record*)> record_callback_;
+  bool got_start_profiling_reply_msg_;
+};
+
+#endif  // SIMPLE_PERF_INPLACE_SAMPLER_CLIENT_H_