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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkCachedData.h"
#include "SkDiscardableMemoryPool.h"
#include "Test.h"
enum LockedState {
kUnlocked,
kLocked,
};
enum CachedState {
kNotInCache,
kInCache,
};
static void check_data(skiatest::Reporter* reporter, SkCachedData* data,
int refcnt, CachedState cacheState, LockedState lockedState) {
REPORTER_ASSERT(reporter, data->testing_only_getRefCnt() == refcnt);
REPORTER_ASSERT(reporter, data->testing_only_isInCache() == (kInCache == cacheState));
REPORTER_ASSERT(reporter, data->testing_only_isLocked() == (lockedState == kLocked));
}
static SkCachedData* make_data(size_t size, SkDiscardableMemoryPool* pool) {
if (pool) {
SkDiscardableMemory* dm = pool->create(size);
// the pool "can" return null, but it shouldn't in these controlled conditions
SK_ALWAYSBREAK(dm);
return SkNEW_ARGS(SkCachedData, (size, dm));
} else {
return SkNEW_ARGS(SkCachedData, (sk_malloc_throw(size), size));
}
}
// returns with the data locked by client and cache
static SkCachedData* test_locking(skiatest::Reporter* reporter,
size_t size, SkDiscardableMemoryPool* pool) {
SkCachedData* data = make_data(size, pool);
memset(data->writable_data(), 0x80, size); // just to use writable_data()
check_data(reporter, data, 1, kNotInCache, kLocked);
data->ref();
check_data(reporter, data, 2, kNotInCache, kLocked);
data->unref();
check_data(reporter, data, 1, kNotInCache, kLocked);
data->attachToCacheAndRef();
check_data(reporter, data, 2, kInCache, kLocked);
data->unref();
check_data(reporter, data, 1, kInCache, kUnlocked);
data->ref();
check_data(reporter, data, 2, kInCache, kLocked);
return data;
}
/*
* SkCachedData behaves differently (regarding its locked/unlocked state) depending on
* when it is in the cache or not. Being in the cache is signaled by calling attachToCacheAndRef()
* instead of ref(). (and balanced by detachFromCacheAndUnref).
*
* Thus, among other things, we test the end-of-life behavior when the client is the last owner
* and when the cache is.
*/
DEF_TEST(CachedData, reporter) {
SkAutoTUnref<SkDiscardableMemoryPool> pool(SkDiscardableMemoryPool::Create(1000));
for (int useDiscardable = 0; useDiscardable <= 1; ++useDiscardable) {
const size_t size = 100;
// test with client as last owner
SkCachedData* data = test_locking(reporter, size, useDiscardable ? pool.get() : NULL);
check_data(reporter, data, 2, kInCache, kLocked);
data->detachFromCacheAndUnref();
check_data(reporter, data, 1, kNotInCache, kLocked);
data->unref();
// test with cache as last owner
data = test_locking(reporter, size, useDiscardable ? pool.get() : NULL);
check_data(reporter, data, 2, kInCache, kLocked);
data->unref();
check_data(reporter, data, 1, kInCache, kUnlocked);
data->detachFromCacheAndUnref();
}
}
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