gfx/skia/trunk/src/lazy/SkDiscardableMemoryPool.h@6474c204b198 (annotated)
gfx/skia/trunk/src/lazy/SkDiscardableMemoryPool.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* |
| michael@0 | 2 | * Copyright 2013 Google Inc. |
| michael@0 | 3 | * |
| michael@0 | 4 | * Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 5 | * found in the LICENSE file. |
| michael@0 | 6 | */ |
| michael@0 | 7 | |
| michael@0 | 8 | #ifndef SkDiscardableMemoryPool_DEFINED |
| michael@0 | 9 | #define SkDiscardableMemoryPool_DEFINED |
| michael@0 | 10 | |
| michael@0 | 11 | #include "SkDiscardableMemory.h" |
| michael@0 | 12 | #include "SkTInternalLList.h" |
| michael@0 | 13 | #include "SkThread.h" |
| michael@0 | 14 | |
| michael@0 | 15 | class SkPoolDiscardableMemory; |
| michael@0 | 16 | |
| michael@0 | 17 | #ifdef SK_DEBUG |
| michael@0 | 18 | #define LAZY_CACHE_STATS 1 |
| michael@0 | 19 | #elif !defined(LAZY_CACHE_STATS) |
| michael@0 | 20 | #define LAZY_CACHE_STATS 0 |
| michael@0 | 21 | #endif |
| michael@0 | 22 | |
| michael@0 | 23 | /** |
| michael@0 | 24 | * This non-global pool can be used for unit tests to verify that the |
| michael@0 | 25 | * pool works. |
| michael@0 | 26 | */ |
| michael@0 | 27 | class SkDiscardableMemoryPool : public SkDiscardableMemory::Factory { |
| michael@0 | 28 | public: |
| michael@0 | 29 | /** |
| michael@0 | 30 | * Without mutex, will be not be thread safe. |
| michael@0 | 31 | */ |
| michael@0 | 32 | SkDiscardableMemoryPool(size_t budget, SkBaseMutex* mutex = NULL); |
| michael@0 | 33 | virtual ~SkDiscardableMemoryPool(); |
| michael@0 | 34 | |
| michael@0 | 35 | virtual SkDiscardableMemory* create(size_t bytes) SK_OVERRIDE; |
| michael@0 | 36 | |
| michael@0 | 37 | size_t getRAMUsed(); |
| michael@0 | 38 | void setRAMBudget(size_t budget); |
| michael@0 | 39 | |
| michael@0 | 40 | /** purges all unlocked DMs */ |
| michael@0 | 41 | void dumpPool(); |
| michael@0 | 42 | |
| michael@0 | 43 | #if LAZY_CACHE_STATS |
| michael@0 | 44 | int fCacheHits; |
| michael@0 | 45 | int fCacheMisses; |
| michael@0 | 46 | #endif // LAZY_CACHE_STATS |
| michael@0 | 47 | |
| michael@0 | 48 | private: |
| michael@0 | 49 | SkBaseMutex* fMutex; |
| michael@0 | 50 | size_t fBudget; |
| michael@0 | 51 | size_t fUsed; |
| michael@0 | 52 | SkTInternalLList<SkPoolDiscardableMemory> fList; |
| michael@0 | 53 | |
| michael@0 | 54 | /** Function called to free memory if needed */ |
| michael@0 | 55 | void dumpDownTo(size_t budget); |
| michael@0 | 56 | /** called by SkDiscardableMemoryPool upon destruction */ |
| michael@0 | 57 | void free(SkPoolDiscardableMemory* dm); |
| michael@0 | 58 | /** called by SkDiscardableMemoryPool::lock() */ |
| michael@0 | 59 | bool lock(SkPoolDiscardableMemory* dm); |
| michael@0 | 60 | /** called by SkDiscardableMemoryPool::unlock() */ |
| michael@0 | 61 | void unlock(SkPoolDiscardableMemory* dm); |
| michael@0 | 62 | |
| michael@0 | 63 | friend class SkPoolDiscardableMemory; |
| michael@0 | 64 | |
| michael@0 | 65 | typedef SkDiscardableMemory::Factory INHERITED; |
| michael@0 | 66 | }; |
| michael@0 | 67 | |
| michael@0 | 68 | /** |
| michael@0 | 69 | * Returns (and creates if needed) a threadsafe global |
| michael@0 | 70 | * SkDiscardableMemoryPool. |
| michael@0 | 71 | */ |
| michael@0 | 72 | SkDiscardableMemoryPool* SkGetGlobalDiscardableMemoryPool(); |
| michael@0 | 73 | |
| michael@0 | 74 | #if !defined(SK_DEFAULT_GLOBAL_DISCARDABLE_MEMORY_POOL_SIZE) |
| michael@0 | 75 | #define SK_DEFAULT_GLOBAL_DISCARDABLE_MEMORY_POOL_SIZE (128 * 1024 * 1024) |
| michael@0 | 76 | #endif |
| michael@0 | 77 | |
| michael@0 | 78 | #endif // SkDiscardableMemoryPool_DEFINED |
