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 ART_RUNTIME_OBJECT_LOCK_H_
18 #define ART_RUNTIME_OBJECT_LOCK_H_
19 
20 #include "base/locks.h"
21 #include "base/macros.h"
22 #include "handle.h"
23 
24 namespace art {
25 
26 class Thread;
27 
28 template <typename T>
29 class ObjectLock {
30  public:
31   ObjectLock(Thread* self, Handle<T> object) REQUIRES_SHARED(Locks::mutator_lock_);
32 
33   ~ObjectLock() REQUIRES_SHARED(Locks::mutator_lock_);
34 
35   void WaitIgnoringInterrupts() REQUIRES_SHARED(Locks::mutator_lock_);
36 
37   void Notify() REQUIRES_SHARED(Locks::mutator_lock_);
38 
39   void NotifyAll() REQUIRES_SHARED(Locks::mutator_lock_);
40 
41  private:
42   Thread* const self_;
43   Handle<T> const obj_;
44 
45   DISALLOW_COPY_AND_ASSIGN(ObjectLock);
46 };
47 
48 template <typename T>
49 class ObjectTryLock {
50  public:
51   ObjectTryLock(Thread* self, Handle<T> object) REQUIRES_SHARED(Locks::mutator_lock_);
52 
53   ~ObjectTryLock() REQUIRES_SHARED(Locks::mutator_lock_);
54 
Acquired()55   bool Acquired() const {
56     return acquired_;
57   }
58 
59  private:
60   Thread* const self_;
61   Handle<T> const obj_;
62   bool acquired_;
63 
64 
65   DISALLOW_COPY_AND_ASSIGN(ObjectTryLock);
66 };
67 
68 
69 }  // namespace art
70 
71 #endif  // ART_RUNTIME_OBJECT_LOCK_H_
72