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| 1 // Copyright 2012, Google Inc. |
| 2 // 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 #include "config.h" |
| 31 #include "bindings/core/dart/DartStringCache.h" |
| 32 |
| 33 #include "bindings/core/dart/DartDOMData.h" |
| 34 #include "bindings/core/dart/DartUtilities.h" |
| 35 |
| 36 namespace blink { |
| 37 |
| 38 DartStringCache::DartStringCache() |
| 39 { |
| 40 m_lastStringImpl = nullptr; |
| 41 m_lastDartString = 0; |
| 42 } |
| 43 |
| 44 void DartStringCache::clearWeakHandles() |
| 45 { |
| 46 Dart_Isolate isolate = Dart_CurrentIsolate(); |
| 47 for (StringCache::iterator it = m_stringCache.begin(); it != m_stringCache.e
nd(); ++it) { |
| 48 it->key->deref(); |
| 49 Dart_DeleteWeakPersistentHandle(isolate, it->value); |
| 50 } |
| 51 m_stringCache.clear(); |
| 52 m_lastStringImpl = nullptr; |
| 53 m_lastDartString = 0; |
| 54 } |
| 55 |
| 56 Dart_WeakPersistentHandle DartStringCache::getSlow(StringImpl* stringImpl, bool
autoDartScope) |
| 57 { |
| 58 ASSERT(stringImpl); |
| 59 |
| 60 Dart_WeakPersistentHandle cachedString = m_stringCache.get(stringImpl); |
| 61 if (cachedString) { |
| 62 m_lastStringImpl = stringImpl; |
| 63 m_lastDartString = cachedString; |
| 64 return cachedString; |
| 65 } |
| 66 |
| 67 if (!autoDartScope) |
| 68 Dart_EnterScope(); |
| 69 |
| 70 ASSERT(stringImpl); |
| 71 Dart_Handle newString = DartUtilities::stringImplToDartString(stringImpl); |
| 72 ASSERT(!Dart_IsError(newString)); |
| 73 |
| 74 intptr_t peerSize = stringImpl->sizeInBytes(); |
| 75 Dart_WeakPersistentHandle wrapper = Dart_NewWeakPersistentHandle(newString,
stringImpl, peerSize, handleFinalizer); |
| 76 |
| 77 stringImpl->ref(); |
| 78 m_stringCache.set(stringImpl, wrapper); |
| 79 |
| 80 m_lastStringImpl = stringImpl; |
| 81 m_lastDartString = wrapper; |
| 82 |
| 83 if (!autoDartScope) |
| 84 Dart_ExitScope(); |
| 85 |
| 86 return wrapper; |
| 87 } |
| 88 |
| 89 void DartStringCache::handleFinalizer(void* isolateCallbackData, Dart_WeakPersis
tentHandle handle, void* peer) |
| 90 { |
| 91 StringImpl* stringImpl = reinterpret_cast<StringImpl*>(peer); |
| 92 DartDOMData* domData = reinterpret_cast<DartDOMData*>(isolateCallbackData); |
| 93 DartStringCache& stringCache = domData->stringCache(); |
| 94 Dart_WeakPersistentHandle ALLOW_UNUSED cached = stringCache.m_stringCache.ta
ke(stringImpl); |
| 95 ASSERT(handle == cached); |
| 96 if (stringCache.m_lastDartString == handle) { |
| 97 stringCache.m_lastStringImpl = nullptr; |
| 98 stringCache.m_lastDartString = 0; |
| 99 } |
| 100 stringImpl->deref(); |
| 101 } |
| 102 |
| 103 } |
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