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comparison: gfx/skia/trunk/src/lazy/SkDiscardableMemoryPool.h
gfx/skia/trunk/src/lazy/SkDiscardableMemoryPool.h
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:6ba366534b5f |
|---|---|
| 1 /* | |
| 2 * Copyright 2013 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 #ifndef SkDiscardableMemoryPool_DEFINED | |
| 9 #define SkDiscardableMemoryPool_DEFINED | |
| 10 | |
| 11 #include "SkDiscardableMemory.h" | |
| 12 #include "SkTInternalLList.h" | |
| 13 #include "SkThread.h" | |
| 14 | |
| 15 class SkPoolDiscardableMemory; | |
| 16 | |
| 17 #ifdef SK_DEBUG | |
| 18 #define LAZY_CACHE_STATS 1 | |
| 19 #elif !defined(LAZY_CACHE_STATS) | |
| 20 #define LAZY_CACHE_STATS 0 | |
| 21 #endif | |
| 22 | |
| 23 /** | |
| 24 * This non-global pool can be used for unit tests to verify that the | |
| 25 * pool works. | |
| 26 */ | |
| 27 class SkDiscardableMemoryPool : public SkDiscardableMemory::Factory { | |
| 28 public: | |
| 29 /** | |
| 30 * Without mutex, will be not be thread safe. | |
| 31 */ | |
| 32 SkDiscardableMemoryPool(size_t budget, SkBaseMutex* mutex = NULL); | |
| 33 virtual ~SkDiscardableMemoryPool(); | |
| 34 | |
| 35 virtual SkDiscardableMemory* create(size_t bytes) SK_OVERRIDE; | |
| 36 | |
| 37 size_t getRAMUsed(); | |
| 38 void setRAMBudget(size_t budget); | |
| 39 | |
| 40 /** purges all unlocked DMs */ | |
| 41 void dumpPool(); | |
| 42 | |
| 43 #if LAZY_CACHE_STATS | |
| 44 int fCacheHits; | |
| 45 int fCacheMisses; | |
| 46 #endif // LAZY_CACHE_STATS | |
| 47 | |
| 48 private: | |
| 49 SkBaseMutex* fMutex; | |
| 50 size_t fBudget; | |
| 51 size_t fUsed; | |
| 52 SkTInternalLList<SkPoolDiscardableMemory> fList; | |
| 53 | |
| 54 /** Function called to free memory if needed */ | |
| 55 void dumpDownTo(size_t budget); | |
| 56 /** called by SkDiscardableMemoryPool upon destruction */ | |
| 57 void free(SkPoolDiscardableMemory* dm); | |
| 58 /** called by SkDiscardableMemoryPool::lock() */ | |
| 59 bool lock(SkPoolDiscardableMemory* dm); | |
| 60 /** called by SkDiscardableMemoryPool::unlock() */ | |
| 61 void unlock(SkPoolDiscardableMemory* dm); | |
| 62 | |
| 63 friend class SkPoolDiscardableMemory; | |
| 64 | |
| 65 typedef SkDiscardableMemory::Factory INHERITED; | |
| 66 }; | |
| 67 | |
| 68 /** | |
| 69 * Returns (and creates if needed) a threadsafe global | |
| 70 * SkDiscardableMemoryPool. | |
| 71 */ | |
| 72 SkDiscardableMemoryPool* SkGetGlobalDiscardableMemoryPool(); | |
| 73 | |
| 74 #if !defined(SK_DEFAULT_GLOBAL_DISCARDABLE_MEMORY_POOL_SIZE) | |
| 75 #define SK_DEFAULT_GLOBAL_DISCARDABLE_MEMORY_POOL_SIZE (128 * 1024 * 1024) | |
| 76 #endif | |
| 77 | |
| 78 #endif // SkDiscardableMemoryPool_DEFINED |
