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| 1 /* |
| 2 * Copyright (C) 2009 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 CrossThreadCopier_h |
| 32 #define CrossThreadCopier_h |
| 33 |
| 34 #if ENABLE(WORKERS) |
| 35 |
| 36 #include <memory> |
| 37 #include <wtf/PassRefPtr.h> |
| 38 #include <wtf/RefPtr.h> |
| 39 #include <wtf/Threading.h> |
| 40 #include <wtf/TypeTraits.h> |
| 41 |
| 42 namespace WebCore { |
| 43 |
| 44 class ResourceError; |
| 45 class ResourceRequest; |
| 46 class ResourceResponse; |
| 47 class String; |
| 48 struct CrossThreadResourceResponseData; |
| 49 struct CrossThreadResourceRequestData; |
| 50 |
| 51 template<typename T> struct CrossThreadCopierPassThrough { |
| 52 typedef T Type; |
| 53 static Type copy(const T& parameter) |
| 54 { |
| 55 return parameter; |
| 56 } |
| 57 }; |
| 58 |
| 59 template<bool isConvertibleToInteger, typename T> struct CrossThreadCopierBa
se; |
| 60 |
| 61 // Integers get passed through without any changes. |
| 62 template<typename T> struct CrossThreadCopierBase<true, T> : public CrossThr
eadCopierPassThrough<T> { |
| 63 }; |
| 64 |
| 65 // Pointers get passed through without any significant changes. |
| 66 template<typename T> struct CrossThreadCopierBase<false, T*> : public CrossT
hreadCopierPassThrough<T*> { |
| 67 }; |
| 68 |
| 69 // Custom copy methods. |
| 70 template<typename T> struct CrossThreadCopierBase<false, RefPtr<ThreadSafeSh
ared<T> > > { |
| 71 typedef PassRefPtr<T> Type; |
| 72 static Type copy(const RefPtr<ThreadSafeShared<T> >& refPtr) |
| 73 { |
| 74 return PassRefPtr<T>(static_cast<T*>(refPtr.get())); |
| 75 } |
| 76 }; |
| 77 |
| 78 template<typename T> struct CrossThreadCopierBase<false, std::auto_ptr<T> >
{ |
| 79 typedef std::auto_ptr<T> Type; |
| 80 static Type copy(const std::auto_ptr<T>& autoPtr) |
| 81 { |
| 82 return std::auto_ptr<T>(*const_cast<std::auto_ptr<T>*>(&autoPtr)); |
| 83 } |
| 84 }; |
| 85 |
| 86 template<> struct CrossThreadCopierBase<false, String> { |
| 87 typedef String Type; |
| 88 static Type copy(const String&); |
| 89 }; |
| 90 |
| 91 template<> struct CrossThreadCopierBase<false, ResourceError> { |
| 92 typedef ResourceError Type; |
| 93 static Type copy(const ResourceError&); |
| 94 }; |
| 95 |
| 96 template<> struct CrossThreadCopierBase<false, ResourceRequest> { |
| 97 typedef std::auto_ptr<CrossThreadResourceRequestData> Type; |
| 98 static Type copy(const ResourceRequest&); |
| 99 }; |
| 100 |
| 101 template<> struct CrossThreadCopierBase<false, ResourceResponse> { |
| 102 typedef std::auto_ptr<CrossThreadResourceResponseData> Type; |
| 103 static Type copy(const ResourceResponse&); |
| 104 }; |
| 105 |
| 106 template<typename T> struct CrossThreadCopier : public CrossThreadCopierBase
<WTF::IsConvertibleToInteger<T>::value, T> { |
| 107 }; |
| 108 |
| 109 } // namespace WebCore |
| 110 |
| 111 #endif // ENABLE(WORKERS) |
| 112 |
| 113 #endif // CrossThreadCopier_h |
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