SkThread.h revision e3f84f3911d6ab1c99030fef3200199755251d51 
1
2/*
3 * Copyright 2006 The Android Open Source Project
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9
10#ifndef SkThread_DEFINED
11#define SkThread_DEFINED
12
13#include "SkTypes.h"
14#include "SkThread_platform.h"
15
16/****** SkThread_platform needs to define the following...
17
18int32_t sk_atomic_inc(int32_t*);
19int32_t sk_atomic_add(int32_t*, int32_t);
20int32_t sk_atomic_dec(int32_t*);
21int32_t sk_atomic_conditional_inc(int32_t*);
22
23class SkMutex {
24public:
25    SkMutex();
26    ~SkMutex();
27
28    void    acquire();
29    void    release();
30};
31
32****************/
33
34class SkAutoMutexAcquire : SkNoncopyable {
35public:
36    explicit SkAutoMutexAcquire(SkBaseMutex& mutex) : fMutex(&mutex) {
37        SkASSERT(fMutex != NULL);
38        mutex.acquire();
39    }
40
41    SkAutoMutexAcquire(SkBaseMutex* mutex) : fMutex(mutex) {
42        if (mutex) {
43            mutex->acquire();
44        }
45    }
46
47    /** If the mutex has not been release, release it now.
48    */
49    ~SkAutoMutexAcquire() {
50        if (fMutex) {
51            fMutex->release();
52        }
53    }
54
55    /** If the mutex has not been release, release it now.
56    */
57    void release() {
58        if (fMutex) {
59            fMutex->release();
60            fMutex = NULL;
61        }
62    }
63
64private:
65    SkBaseMutex* fMutex;
66};
67
68#endif
69