1/*
2 * Copyright (C) 2006 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 SkThread_DEFINED
18#define SkThread_DEFINED
19
20#include "SkTypes.h"
21#include "SkThread_platform.h"
22
23/****** SkThread_platform needs to define the following...
24
25int32_t sk_atomic_inc(int32_t*);
26int32_t sk_atomic_dec(int32_t*);
27
28class SkMutex {
29public:
30    SkMutex();
31    ~SkMutex();
32
33    void    acquire();
34    void    release();
35};
36
37****************/
38
39class SkAutoMutexAcquire : SkNoncopyable {
40public:
41    explicit SkAutoMutexAcquire(SkMutex& mutex) : fMutex(&mutex)
42    {
43        SkASSERT(fMutex != NULL);
44        mutex.acquire();
45    }
46    /** If the mutex has not been release, release it now.
47    */
48    ~SkAutoMutexAcquire()
49    {
50        if (fMutex)
51            fMutex->release();
52    }
53    /** If the mutex has not been release, release it now.
54    */
55    void release()
56    {
57        if (fMutex)
58        {
59            fMutex->release();
60            fMutex = NULL;
61        }
62    }
63
64private:
65    SkMutex* fMutex;
66};
67
68#endif
69