no_synchronization.h revision b83ad73794088498d6d38cd3b4fc9311f505d051 
1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef FRAMEWORKS_EX_VARIABLESPEED_JNI_NO_SYNCHRONIZATION_H_
18#define FRAMEWORKS_EX_VARIABLESPEED_JNI_NO_SYNCHRONIZATION_H_
19
20#include <macros.h>
21
22// We don't need any synchronization at the moment.
23// The sola_time_scaler (which is the code that uses this mutex class) is
24// currently being used in a single-threaded manner, driven from the main
25// PlayFromThisSource method in variablespeed.
26// As such no locking is actually required, and so this class contains a
27// fake mutex that does nothing.
28
29class Mutex {
30 public:
31  Mutex() {}
32  virtual ~Mutex() {}
33  void Lock() {}
34  void Unlock() {}
35
36 private:
37  DISALLOW_COPY_AND_ASSIGN(Mutex);
38};
39
40class MutexLock {
41 public:
42  explicit MutexLock(Mutex* mu) : mu_(mu) {}
43  virtual ~MutexLock() {}
44
45 private:
46  Mutex* const mu_;
47  DISALLOW_COPY_AND_ASSIGN(MutexLock);
48};
49
50#endif  // FRAMEWORKS_EX_VARIABLESPEED_JNI_NO_SYNCHRONIZATION_H_
51