blob: 20411402107c25c382a17d67a1efb91d7ee25877 (
plain)
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
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_SCOPED_NSOBJECT_H_
#define BASE_SCOPED_NSOBJECT_H_
#import <Foundation/Foundation.h>
#include "base/basictypes.h"
// scoped_nsobject<> is patterned after scoped_ptr<>, but maintains ownership
// of an NSObject subclass object. Style deviations here are solely for
// compatibility with scoped_ptr<>'s interface, with which everyone is already
// familiar.
//
// When scoped_nsobject<> takes ownership of an object (in the constructor or
// in reset()), it takes over the caller's existing ownership claim. The
// caller must own the object it gives to scoped_nsobject<>, and relinquishes
// an ownership claim to that object. scoped_nsobject<> does not call
// -retain.
template<typename NST>
class scoped_nsobject {
public:
typedef NST* element_type;
explicit scoped_nsobject(NST* object = nil)
: object_(object) {
}
~scoped_nsobject() {
[object_ release];
}
void reset(NST* object = nil) {
[object_ release];
object_ = object;
}
bool operator==(NST* that) const {
return object_ == that;
}
bool operator!=(NST* that) const {
return object_ != that;
}
operator NST*() const {
return object_;
}
NST* get() const {
return object_;
}
void swap(scoped_nsobject& that) {
NST* temp = that.object_;
that.object_ = object_;
object_ = temp;
}
// scoped_nsobject<>::release() is like scoped_ptr<>::release. It is NOT
// a wrapper for [object_ release]. To force a scoped_nsobject<> object to
// call [object_ release], use scoped_nsobject<>::reset().
NST* release() {
NST* temp = object_;
object_ = nil;
return temp;
}
private:
NST* object_;
DISALLOW_COPY_AND_ASSIGN(scoped_nsobject);
};
#endif // BASE_SCOPED_NSOBJECT_H_
|
