1/*
2 * Copyright 2015 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#include "SkSharedMutex.h"
9#include "SkTaskGroup.h"
10
11#include "Test.h"
12
13DEF_TEST(SkSharedMutexBasic, r) {
14    SkSharedMutex sm;
15    sm.acquire();
16    sm.assertHeld();
17    sm.release();
18    sm.acquireShared();
19    sm.assertHeldShared();
20    sm.releaseShared();
21}
22
23DEF_TEST(SkSharedMutexMultiThreaded, r) {
24    SkSharedMutex sm;
25    static const int kSharedSize = 10;
26    int shared[kSharedSize];
27    int value = 0;
28    for (int i = 0; i < kSharedSize; ++i) {
29        shared[i] = 0;
30    }
31    SkTaskGroup().batch(8, [&](int threadIndex) {
32        if (threadIndex % 4 != 0) {
33            for (int c = 0; c < 100000; ++c) {
34                sm.acquireShared();
35                sm.assertHeldShared();
36                int v = shared[0];
37                for (int i = 1; i < kSharedSize; ++i) {
38                    REPORTER_ASSERT(r, v == shared[i]);
39                }
40                sm.releaseShared();
41            }
42        } else {
43            for (int c = 0; c < 100000; ++c) {
44                sm.acquire();
45                sm.assertHeld();
46                value += 1;
47                for (int i = 0; i < kSharedSize; ++i) {
48                    shared[i] = value;
49                }
50                sm.release();
51            }
52        }
53    });
54}
55