ResourceCache.cpp revision 5a4690bf26932c0d6940e4af8516d920e09ae81a
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#include "ResourceCache.h" 18#include "Caches.h" 19 20namespace android { 21 22using namespace uirenderer; 23ANDROID_SINGLETON_STATIC_INSTANCE(ResourceCache); 24 25namespace uirenderer { 26 27/////////////////////////////////////////////////////////////////////////////// 28// Resource cache 29/////////////////////////////////////////////////////////////////////////////// 30 31void ResourceCache::logCache() { 32 ALOGD("ResourceCache: cacheReport:"); 33 for (size_t i = 0; i < mCache->size(); ++i) { 34 ResourceReference* ref = mCache->valueAt(i); 35 ALOGD(" ResourceCache: mCache(%zu): resource, ref = 0x%p, 0x%p", 36 i, mCache->keyAt(i), mCache->valueAt(i)); 37 ALOGD(" ResourceCache: mCache(%zu): refCount, destroyed, type = %d, %d, %d", 38 i, ref->refCount, ref->destroyed, ref->resourceType); 39 } 40} 41 42ResourceCache::ResourceCache() { 43 Mutex::Autolock _l(mLock); 44 mCache = new KeyedVector<const void*, ResourceReference*>(); 45} 46 47ResourceCache::~ResourceCache() { 48 Mutex::Autolock _l(mLock); 49 delete mCache; 50} 51 52void ResourceCache::lock() { 53 mLock.lock(); 54} 55 56void ResourceCache::unlock() { 57 mLock.unlock(); 58} 59 60void ResourceCache::incrementRefcount(void* resource, ResourceType resourceType) { 61 Mutex::Autolock _l(mLock); 62 incrementRefcountLocked(resource, resourceType); 63} 64 65void ResourceCache::incrementRefcount(const Res_png_9patch* patchResource) { 66 incrementRefcount((void*) patchResource, kNinePatch); 67} 68 69void ResourceCache::incrementRefcountLocked(void* resource, ResourceType resourceType) { 70 ssize_t index = mCache->indexOfKey(resource); 71 ResourceReference* ref = index >= 0 ? mCache->valueAt(index) : nullptr; 72 if (ref == nullptr || mCache->size() == 0) { 73 ref = new ResourceReference(resourceType); 74 mCache->add(resource, ref); 75 } 76 ref->refCount++; 77} 78 79void ResourceCache::decrementRefcount(void* resource) { 80 Mutex::Autolock _l(mLock); 81 decrementRefcountLocked(resource); 82} 83 84void ResourceCache::decrementRefcount(const Res_png_9patch* patchResource) { 85 decrementRefcount((void*) patchResource); 86} 87 88void ResourceCache::decrementRefcountLocked(void* resource) { 89 ssize_t index = mCache->indexOfKey(resource); 90 ResourceReference* ref = index >= 0 ? mCache->valueAt(index) : nullptr; 91 if (ref == nullptr) { 92 // Should not get here - shouldn't get a call to decrement if we're not yet tracking it 93 return; 94 } 95 ref->refCount--; 96 if (ref->refCount == 0) { 97 deleteResourceReferenceLocked(resource, ref); 98 } 99} 100 101void ResourceCache::decrementRefcountLocked(const Res_png_9patch* patchResource) { 102 decrementRefcountLocked((void*) patchResource); 103} 104 105void ResourceCache::destructor(Res_png_9patch* resource) { 106 Mutex::Autolock _l(mLock); 107 destructorLocked(resource); 108} 109 110void ResourceCache::destructorLocked(Res_png_9patch* resource) { 111 ssize_t index = mCache->indexOfKey(resource); 112 ResourceReference* ref = index >= 0 ? mCache->valueAt(index) : nullptr; 113 if (ref == nullptr) { 114 // If we're not tracking this resource, just delete it 115 if (Caches::hasInstance()) { 116 Caches::getInstance().patchCache.removeDeferred(resource); 117 } else { 118 // A Res_png_9patch is actually an array of byte that's larger 119 // than sizeof(Res_png_9patch). It must be freed as an array. 120 delete[] (int8_t*) resource; 121 } 122 return; 123 } 124 ref->destroyed = true; 125 if (ref->refCount == 0) { 126 deleteResourceReferenceLocked(resource, ref); 127 } 128} 129 130/** 131 * This method should only be called while the mLock mutex is held (that mutex is grabbed 132 * by the various destructor() and recycle() methods which call this method). 133 */ 134void ResourceCache::deleteResourceReferenceLocked(const void* resource, ResourceReference* ref) { 135 if (ref->destroyed) { 136 switch (ref->resourceType) { 137 case kNinePatch: { 138 if (Caches::hasInstance()) { 139 Caches::getInstance().patchCache.removeDeferred((Res_png_9patch*) resource); 140 } else { 141 // A Res_png_9patch is actually an array of byte that's larger 142 // than sizeof(Res_png_9patch). It must be freed as an array. 143 int8_t* patch = (int8_t*) resource; 144 delete[] patch; 145 } 146 } 147 break; 148 } 149 } 150 mCache->removeItem(resource); 151 delete ref; 152} 153 154}; // namespace uirenderer 155}; // namespace android 156