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
|
// Copyright 2008, 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 BASE_SCOPED_CFTYPEREF_H_
#define BASE_SCOPED_CFTYPEREF_H_
#include <CoreFoundation/CoreFoundation.h>
#include "base/basictypes.h"
// scoped_cftyperef<> is patterned after scoped_ptr<>, but maintains ownership
// of a CoreFoundation object: any object that can be represented as a
// CFTypeRef. Style deviations here are solely for compatibility with
// scoped_ptr<>'s interface, with which everyone is already familiar.
template<typename CFT>
class scoped_cftyperef {
public:
typedef CFT element_type;
explicit scoped_cftyperef(CFT object = NULL)
: object_(object) {
}
~scoped_cftyperef() {
if (object_)
CFRelease(object_);
}
void reset(CFT object = NULL) {
if (object_ && object_ != object) {
CFRelease(object_);
object_ = object;
}
}
bool operator==(CFT that) const {
return object_ == that;
}
bool operator!=(CFT that) const {
return object_ != that;
}
operator CFT() const {
return object_;
}
CFT get() const {
return object_;
}
void swap(scoped_cftyperef& that) {
CFT temp = that.object_;
that.object_ = object_;
object_ = temp;
}
// scoped_cftyperef<>::release() is like scoped_ptr<>::release. It is NOT
// a wrapper for CFRelease(). To force a scoped_cftyperef<> object to call
// CFRelease(), use scoped_cftyperef<>::reset().
CFT release() {
CFT temp = object_;
object_ = NULL;
return temp;
}
private:
CFT object_;
DISALLOW_COPY_AND_ASSIGN(scoped_cftyperef);
};
#endif // BASE_SCOPED_CFTYPEREF_H_
|
