upload android base code part6

android/system/extras/memory_replay/Thread.h

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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 _MEMORY_REPLAY_THREAD_H
+#define _MEMORY_REPLAY_THREAD_H
+
+#include <pthread.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+class Action;
+class Pointers;
+
+constexpr size_t ACTION_MEMORY_SIZE = 128;
+
+class Thread {
+ public:
+  Thread();
+  virtual ~Thread();
+
+  void WaitForReady();
+  void WaitForPending();
+  void SetPending();
+  void ClearPending();
+
+  Action* CreateAction(uintptr_t key_pointer, const char* type, const char* line);
+  void AddTimeNsecs(uint64_t nsecs) { total_time_nsecs_ += nsecs; }
+
+  void set_pointers(Pointers* pointers) { pointers_ = pointers; }
+  Pointers* pointers() { return pointers_; }
+
+  Action* GetAction() { return reinterpret_cast<Action*>(action_memory_); }
+
+ private:
+  pthread_mutex_t mutex_ = PTHREAD_MUTEX_INITIALIZER;
+  pthread_cond_t cond_;
+  bool pending_ = false;
+
+  pthread_t thread_id_;
+  pid_t tid_ = 0;
+  uint64_t total_time_nsecs_ = 0;
+
+  Pointers* pointers_ = nullptr;
+
+  // Per thread memory for an Action. Only one action can be processed.
+  // at a time.
+  static constexpr size_t ACTION_SIZE = 128;
+  uint8_t action_memory_[ACTION_SIZE];
+
+  friend class Threads;
+};
+
+#endif // _MEMORY_REPLAY_THREAD_H