blob: 6c441617072d28cb87f1e9bf250ded9932e87bcc [file] [log] [blame]
reed9d93c2e2014-10-08 05:17:12 -07001/*
2 * Copyright 2014 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 "SkCachedData.h"
9#include "SkDiscardableMemoryPool.h"
10#include "Test.h"
11
12enum LockedState {
13 kUnlocked,
14 kLocked,
15};
16
17enum CachedState {
18 kNotInCache,
19 kInCache,
20};
21
22static void check_data(skiatest::Reporter* reporter, SkCachedData* data,
23 int refcnt, CachedState cacheState, LockedState lockedState) {
24 REPORTER_ASSERT(reporter, data->testing_only_getRefCnt() == refcnt);
25 REPORTER_ASSERT(reporter, data->testing_only_isInCache() == (kInCache == cacheState));
26 REPORTER_ASSERT(reporter, data->testing_only_isLocked() == (lockedState == kLocked));
27}
28
29static SkCachedData* make_data(size_t size, SkDiscardableMemoryPool* pool) {
30 if (pool) {
31 SkDiscardableMemory* dm = pool->create(size);
32 // the pool "can" return null, but it shouldn't in these controlled conditions
djsollenf2b340f2016-01-29 08:51:04 -080033 SkASSERT_RELEASE(dm);
halcanary385fe4d2015-08-26 13:07:48 -070034 return new SkCachedData(size, dm);
reed9d93c2e2014-10-08 05:17:12 -070035 } else {
halcanary385fe4d2015-08-26 13:07:48 -070036 return new SkCachedData(sk_malloc_throw(size), size);
reed9d93c2e2014-10-08 05:17:12 -070037 }
38}
39
40// returns with the data locked by client and cache
41static SkCachedData* test_locking(skiatest::Reporter* reporter,
42 size_t size, SkDiscardableMemoryPool* pool) {
43 SkCachedData* data = make_data(size, pool);
44
45 memset(data->writable_data(), 0x80, size); // just to use writable_data()
46
47 check_data(reporter, data, 1, kNotInCache, kLocked);
48
49 data->ref();
50 check_data(reporter, data, 2, kNotInCache, kLocked);
51 data->unref();
52 check_data(reporter, data, 1, kNotInCache, kLocked);
53
54 data->attachToCacheAndRef();
55 check_data(reporter, data, 2, kInCache, kLocked);
56
57 data->unref();
58 check_data(reporter, data, 1, kInCache, kUnlocked);
59
60 data->ref();
61 check_data(reporter, data, 2, kInCache, kLocked);
62
63 return data;
64}
65
66/*
67 * SkCachedData behaves differently (regarding its locked/unlocked state) depending on
68 * when it is in the cache or not. Being in the cache is signaled by calling attachToCacheAndRef()
69 * instead of ref(). (and balanced by detachFromCacheAndUnref).
70 *
71 * Thus, among other things, we test the end-of-life behavior when the client is the last owner
72 * and when the cache is.
73 */
74DEF_TEST(CachedData, reporter) {
75 SkAutoTUnref<SkDiscardableMemoryPool> pool(SkDiscardableMemoryPool::Create(1000));
76
77 for (int useDiscardable = 0; useDiscardable <= 1; ++useDiscardable) {
78 const size_t size = 100;
79
80 // test with client as last owner
halcanary96fcdcc2015-08-27 07:41:13 -070081 SkCachedData* data = test_locking(reporter, size, useDiscardable ? pool.get() : nullptr);
reed9d93c2e2014-10-08 05:17:12 -070082 check_data(reporter, data, 2, kInCache, kLocked);
83 data->detachFromCacheAndUnref();
84 check_data(reporter, data, 1, kNotInCache, kLocked);
85 data->unref();
86
87 // test with cache as last owner
halcanary96fcdcc2015-08-27 07:41:13 -070088 data = test_locking(reporter, size, useDiscardable ? pool.get() : nullptr);
reed9d93c2e2014-10-08 05:17:12 -070089 check_data(reporter, data, 2, kInCache, kLocked);
90 data->unref();
91 check_data(reporter, data, 1, kInCache, kUnlocked);
92 data->detachFromCacheAndUnref();
93 }
94}
95