1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_HWUI_RESOURCE_CACHE_H 18 #define ANDROID_HWUI_RESOURCE_CACHE_H 19 20 #include <cutils/compiler.h> 21 22 #include <SkBitmap.h> 23 #include <SkPixelRef.h> 24 25 #include <utils/KeyedVector.h> 26 #include <utils/Singleton.h> 27 28 #include <androidfw/ResourceTypes.h> 29 30 namespace android { 31 namespace uirenderer { 32 33 class Layer; 34 35 /** 36 * Type of Resource being cached 37 */ 38 enum ResourceType { 39 kNinePatch, 40 }; 41 42 class ResourceReference { 43 public: 44 ResourceReference(ResourceType type)45 explicit ResourceReference(ResourceType type) { 46 refCount = 0; destroyed = false; resourceType = type; 47 } 48 49 int refCount; 50 bool destroyed; 51 ResourceType resourceType; 52 }; 53 54 class ANDROID_API ResourceCache: public Singleton<ResourceCache> { 55 ResourceCache(); 56 ~ResourceCache(); 57 58 friend class Singleton<ResourceCache>; 59 60 public: 61 62 /** 63 * When using these two methods, make sure to only invoke the *Locked() 64 * variants of increment/decrementRefcount(), recyle() and destructor() 65 */ 66 void lock(); 67 void unlock(); 68 69 void incrementRefcount(const Res_png_9patch* resource); 70 71 void decrementRefcount(const Res_png_9patch* resource); 72 73 void decrementRefcountLocked(const Res_png_9patch* resource); 74 75 void destructor(Res_png_9patch* resource); 76 77 void destructorLocked(Res_png_9patch* resource); 78 79 private: 80 void deleteResourceReferenceLocked(const void* resource, ResourceReference* ref); 81 82 void incrementRefcount(void* resource, ResourceType resourceType); 83 void incrementRefcountLocked(void* resource, ResourceType resourceType); 84 85 void decrementRefcount(void* resource); 86 void decrementRefcountLocked(void* resource); 87 88 void logCache(); 89 90 /** 91 * Used to increment, decrement, and destroy. Incrementing is generally accessed on the UI 92 * thread, but destroying resources may be called from the GC thread, the finalizer thread, 93 * or a reference queue finalization thread. 94 */ 95 mutable Mutex mLock; 96 97 KeyedVector<const void*, ResourceReference*>* mCache; 98 }; 99 100 }; // namespace uirenderer 101 }; // namespace android 102 103 #endif // ANDROID_HWUI_RESOURCE_CACHE_H 104