1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/lazy/SkDiscardableMemoryPool.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,78 @@
1.4 +/*
1.5 + * Copyright 2013 Google Inc.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +#ifndef SkDiscardableMemoryPool_DEFINED
1.12 +#define SkDiscardableMemoryPool_DEFINED
1.13 +
1.14 +#include "SkDiscardableMemory.h"
1.15 +#include "SkTInternalLList.h"
1.16 +#include "SkThread.h"
1.17 +
1.18 +class SkPoolDiscardableMemory;
1.19 +
1.20 +#ifdef SK_DEBUG
1.21 + #define LAZY_CACHE_STATS 1
1.22 +#elif !defined(LAZY_CACHE_STATS)
1.23 + #define LAZY_CACHE_STATS 0
1.24 +#endif
1.25 +
1.26 +/**
1.27 + * This non-global pool can be used for unit tests to verify that the
1.28 + * pool works.
1.29 + */
1.30 +class SkDiscardableMemoryPool : public SkDiscardableMemory::Factory {
1.31 +public:
1.32 + /**
1.33 + * Without mutex, will be not be thread safe.
1.34 + */
1.35 + SkDiscardableMemoryPool(size_t budget, SkBaseMutex* mutex = NULL);
1.36 + virtual ~SkDiscardableMemoryPool();
1.37 +
1.38 + virtual SkDiscardableMemory* create(size_t bytes) SK_OVERRIDE;
1.39 +
1.40 + size_t getRAMUsed();
1.41 + void setRAMBudget(size_t budget);
1.42 +
1.43 + /** purges all unlocked DMs */
1.44 + void dumpPool();
1.45 +
1.46 + #if LAZY_CACHE_STATS
1.47 + int fCacheHits;
1.48 + int fCacheMisses;
1.49 + #endif // LAZY_CACHE_STATS
1.50 +
1.51 +private:
1.52 + SkBaseMutex* fMutex;
1.53 + size_t fBudget;
1.54 + size_t fUsed;
1.55 + SkTInternalLList<SkPoolDiscardableMemory> fList;
1.56 +
1.57 + /** Function called to free memory if needed */
1.58 + void dumpDownTo(size_t budget);
1.59 + /** called by SkDiscardableMemoryPool upon destruction */
1.60 + void free(SkPoolDiscardableMemory* dm);
1.61 + /** called by SkDiscardableMemoryPool::lock() */
1.62 + bool lock(SkPoolDiscardableMemory* dm);
1.63 + /** called by SkDiscardableMemoryPool::unlock() */
1.64 + void unlock(SkPoolDiscardableMemory* dm);
1.65 +
1.66 + friend class SkPoolDiscardableMemory;
1.67 +
1.68 + typedef SkDiscardableMemory::Factory INHERITED;
1.69 +};
1.70 +
1.71 +/**
1.72 + * Returns (and creates if needed) a threadsafe global
1.73 + * SkDiscardableMemoryPool.
1.74 + */
1.75 +SkDiscardableMemoryPool* SkGetGlobalDiscardableMemoryPool();
1.76 +
1.77 +#if !defined(SK_DEFAULT_GLOBAL_DISCARDABLE_MEMORY_POOL_SIZE)
1.78 +#define SK_DEFAULT_GLOBAL_DISCARDABLE_MEMORY_POOL_SIZE (128 * 1024 * 1024)
1.79 +#endif
1.80 +
1.81 +#endif // SkDiscardableMemoryPool_DEFINED
