| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkDiscardableMemoryPool_DEFINED |
| #define SkDiscardableMemoryPool_DEFINED |
| |
| #include "SkDiscardableMemory.h" |
| |
| #ifndef SK_LAZY_CACHE_STATS |
| #ifdef SK_DEBUG |
| #define SK_LAZY_CACHE_STATS 1 |
| #else |
| #define SK_LAZY_CACHE_STATS 0 |
| #endif |
| #endif |
| |
| /** |
| * An implementation of Discardable Memory that manages a fixed-size |
| * budget of memory. When the allocated memory exceeds this size, |
| * unlocked blocks of memory are purged. If all memory is locked, it |
| * can exceed the memory-use budget. |
| */ |
| class SkDiscardableMemoryPool : public SkDiscardableMemory::Factory { |
| public: |
| virtual ~SkDiscardableMemoryPool() { } |
| |
| virtual size_t getRAMUsed() = 0; |
| virtual void setRAMBudget(size_t budget) = 0; |
| virtual size_t getRAMBudget() = 0; |
| |
| /** purges all unlocked DMs */ |
| virtual void dumpPool() = 0; |
| |
| #if SK_LAZY_CACHE_STATS |
| /** |
| * These two values are a count of the number of successful and |
| * failed calls to SkDiscardableMemory::lock() for all DMs managed |
| * by this pool. |
| */ |
| virtual int getCacheHits() = 0; |
| virtual int getCacheMisses() = 0; |
| virtual void resetCacheHitsAndMisses() = 0; |
| #endif |
| |
| /** |
| * This non-global pool can be used for unit tests to verify that |
| * the pool works. |
| * Without mutex, will be not be thread safe. |
| */ |
| static SkDiscardableMemoryPool* Create( |
| size_t size, SkBaseMutex* mutex = NULL); |
| }; |
| |
| /** |
| * Returns (and creates if needed) a threadsafe global |
| * SkDiscardableMemoryPool. |
| */ |
| SkDiscardableMemoryPool* SkGetGlobalDiscardableMemoryPool(); |
| |
| #if !defined(SK_DEFAULT_GLOBAL_DISCARDABLE_MEMORY_POOL_SIZE) |
| #if defined(SK_DEFAULT_RESOURCE_CACHE_MB_LIMIT) && \ |
| SK_DEFAULT_RESOURCE_CACHE_MB_LIMIT > 0 |
| #define SK_DEFAULT_GLOBAL_DISCARDABLE_MEMORY_POOL_SIZE \ |
| (SK_DEFAULT_RESOURCE_CACHE_MB_LIMIT * 1024 * 1024) |
| #else |
| #define SK_DEFAULT_GLOBAL_DISCARDABLE_MEMORY_POOL_SIZE \ |
| (128 * 1024 * 1024) |
| #endif |
| #endif |
| |
| #endif // SkDiscardableMemoryPool_DEFINED |