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| 1 /* | |
| 2 * Copyright (C) 2013 Google Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions are | |
| 6 * met: | |
| 7 * | |
| 8 * * Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * * Redistributions in binary form must reproduce the above | |
| 11 * copyright notice, this list of conditions and the following disclaimer | |
| 12 * in the documentation and/or other materials provided with the | |
| 13 * distribution. | |
| 14 * * Neither the name of Google Inc. nor the names of its | |
| 15 * contributors may be used to endorse or promote products derived from | |
| 16 * this software without specific prior written permission. | |
| 17 * | |
| 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 */ | |
| 30 | |
| 31 #ifndef ResourceOwner_h | |
| 32 #define ResourceOwner_h | |
| 33 | |
| 34 #include "core/fetch/Resource.h" | |
| 35 #include "platform/heap/Handle.h" | |
| 36 | |
| 37 namespace blink { | |
| 38 | |
| 39 template <class R, class C> | |
| 40 class GC_PLUGIN_IGNORE("https://crbug.com/652966") ResourceOwner; | |
| 41 | |
| 42 template <class R, class C = typename R::ClientType> | |
| 43 class ResourceOwner : public C { | |
| 44 USING_PRE_FINALIZER(ResourceOwner, clearResource); | |
| 45 | |
| 46 public: | |
| 47 using ResourceType = R; | |
| 48 ~ResourceOwner() override {} | |
| 49 ResourceType* resource() const { return m_resource; } | |
| 50 | |
| 51 DEFINE_INLINE_TRACE() { | |
| 52 visitor->trace(m_resource); | |
| 53 C::trace(visitor); | |
| 54 } | |
| 55 | |
| 56 protected: | |
| 57 ResourceOwner() {} | |
| 58 | |
| 59 void setResource( | |
| 60 ResourceType*, | |
| 61 Resource::PreloadReferencePolicy = Resource::MarkAsReferenced); | |
| 62 void clearResource() { setResource(nullptr); } | |
| 63 | |
| 64 private: | |
| 65 Member<ResourceType> m_resource; | |
| 66 }; | |
| 67 | |
| 68 template <class R, class C> | |
| 69 inline void ResourceOwner<R, C>::setResource( | |
| 70 R* newResource, | |
| 71 Resource::PreloadReferencePolicy preloadReferencePolicy) { | |
| 72 if (newResource == m_resource) | |
| 73 return; | |
| 74 | |
| 75 // Some ResourceClient implementations reenter this so | |
| 76 // we need to prevent double removal. | |
| 77 if (ResourceType* oldResource = m_resource.release()) | |
| 78 oldResource->removeClient(this); | |
| 79 | |
| 80 if (newResource) { | |
| 81 m_resource = newResource; | |
| 82 m_resource->addClient(this, preloadReferencePolicy); | |
| 83 } | |
| 84 } | |
| 85 | |
| 86 } // namespace blink | |
| 87 | |
| 88 #endif | |
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Chromium Code Reviews
Issue 2584423002:
Loading: move core/fetch to platform/loader/fetch (Closed)
