1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
/*
* Copyright (C) 2009, 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef CrossThreadCopier_h
#define CrossThreadCopier_h
#include <memory>
#include <wtf/PassOwnPtr.h>
#include <wtf/PassRefPtr.h>
#include <wtf/RefPtr.h>
#include <wtf/Threading.h>
#include <wtf/TypeTraits.h>
namespace WebCore {
class KURL;
class ResourceError;
class ResourceRequest;
class ResourceResponse;
class String;
struct CrossThreadResourceResponseData;
struct CrossThreadResourceRequestData;
struct ThreadableLoaderOptions;
template<typename T> struct CrossThreadCopierPassThrough {
typedef T Type;
static Type copy(const T& parameter)
{
return parameter;
}
};
template<bool isConvertibleToInteger, bool isThreadsafeShared, typename T> struct CrossThreadCopierBase;
// Integers get passed through without any changes.
template<typename T> struct CrossThreadCopierBase<true, false, T> : public CrossThreadCopierPassThrough<T> {
};
// Pointers get passed through without any significant changes.
template<typename T> struct CrossThreadCopierBase<false, false, T*> : public CrossThreadCopierPassThrough<T*> {
};
template<> struct CrossThreadCopierBase<false, false, ThreadableLoaderOptions> : public CrossThreadCopierPassThrough<ThreadableLoaderOptions> {
};
// Custom copy methods.
template<typename T> struct CrossThreadCopierBase<false, true, T> {
typedef typename WTF::RemoveTemplate<T, RefPtr>::Type RefCountedType;
typedef PassRefPtr<RefCountedType> Type;
static Type copy(const T& refPtr)
{
return refPtr.get();
}
};
template<typename T> struct CrossThreadCopierBase<false, false, PassOwnPtr<T> > {
typedef PassOwnPtr<T> Type;
static Type copy(const PassOwnPtr<T>& ownPtr)
{
return PassOwnPtr<T>(static_cast<T*>(ownPtr.release()));
}
};
template<typename T> struct CrossThreadCopierBase<false, false, std::auto_ptr<T> > {
typedef std::auto_ptr<T> Type;
static Type copy(const std::auto_ptr<T>& autoPtr)
{
return std::auto_ptr<T>(*const_cast<std::auto_ptr<T>*>(&autoPtr));
}
};
template<> struct CrossThreadCopierBase<false, false, KURL> {
typedef KURL Type;
static Type copy(const KURL&);
};
template<> struct CrossThreadCopierBase<false, false, String> {
typedef String Type;
static Type copy(const String&);
};
template<> struct CrossThreadCopierBase<false, false, ResourceError> {
typedef ResourceError Type;
static Type copy(const ResourceError&);
};
template<> struct CrossThreadCopierBase<false, false, ResourceRequest> {
typedef std::auto_ptr<CrossThreadResourceRequestData> Type;
static Type copy(const ResourceRequest&);
};
template<> struct CrossThreadCopierBase<false, false, ResourceResponse> {
typedef std::auto_ptr<CrossThreadResourceResponseData> Type;
static Type copy(const ResourceResponse&);
};
template<typename T> struct CrossThreadCopier : public CrossThreadCopierBase<WTF::IsConvertibleToInteger<T>::value,
WTF::IsSubclassOfTemplate<typename WTF::RemoveTemplate<T, RefPtr>::Type, ThreadSafeShared>::value,
T> {
};
} // namespace WebCore
#endif // CrossThreadCopier_h
|
