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| 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef BASE_SCOPED_CFTYPEREF_H_ | |
| 6 #define BASE_SCOPED_CFTYPEREF_H_ | |
| 7 #pragma once | |
| 8 | |
| 9 #include <CoreFoundation/CoreFoundation.h> | |
| 10 #include "base/basictypes.h" | |
| 11 #include "base/compiler_specific.h" | |
| 12 | |
| 13 // scoped_cftyperef<> is patterned after scoped_ptr<>, but maintains ownership | |
| 14 // of a CoreFoundation object: any object that can be represented as a | |
| 15 // CFTypeRef. Style deviations here are solely for compatibility with | |
| 16 // scoped_ptr<>'s interface, with which everyone is already familiar. | |
| 17 // | |
| 18 // When scoped_cftyperef<> takes ownership of an object (in the constructor or | |
| 19 // in reset()), it takes over the caller's existing ownership claim. The | |
| 20 // caller must own the object it gives to scoped_cftyperef<>, and relinquishes | |
| 21 // an ownership claim to that object. scoped_cftyperef<> does not call | |
| 22 // CFRetain(). | |
| 23 template<typename CFT> | |
| 24 class scoped_cftyperef { | |
| 25 public: | |
| 26 typedef CFT element_type; | |
| 27 | |
| 28 explicit scoped_cftyperef(CFT object = NULL) | |
| 29 : object_(object) { | |
| 30 } | |
| 31 | |
| 32 ~scoped_cftyperef() { | |
| 33 if (object_) | |
| 34 CFRelease(object_); | |
| 35 } | |
| 36 | |
| 37 void reset(CFT object = NULL) { | |
| 38 if (object_) | |
| 39 CFRelease(object_); | |
| 40 object_ = object; | |
| 41 } | |
| 42 | |
| 43 bool operator==(CFT that) const { | |
| 44 return object_ == that; | |
| 45 } | |
| 46 | |
| 47 bool operator!=(CFT that) const { | |
| 48 return object_ != that; | |
| 49 } | |
| 50 | |
| 51 operator CFT() const { | |
| 52 return object_; | |
| 53 } | |
| 54 | |
| 55 CFT get() const { | |
| 56 return object_; | |
| 57 } | |
| 58 | |
| 59 void swap(scoped_cftyperef& that) { | |
| 60 CFT temp = that.object_; | |
| 61 that.object_ = object_; | |
| 62 object_ = temp; | |
| 63 } | |
| 64 | |
| 65 // scoped_cftyperef<>::release() is like scoped_ptr<>::release. It is NOT | |
| 66 // a wrapper for CFRelease(). To force a scoped_cftyperef<> object to call | |
| 67 // CFRelease(), use scoped_cftyperef<>::reset(). | |
| 68 CFT release() WARN_UNUSED_RESULT { | |
| 69 CFT temp = object_; | |
| 70 object_ = NULL; | |
| 71 return temp; | |
| 72 } | |
| 73 | |
| 74 private: | |
| 75 CFT object_; | |
| 76 | |
| 77 DISALLOW_COPY_AND_ASSIGN(scoped_cftyperef); | |
| 78 }; | |
| 79 | |
| 80 #endif // BASE_SCOPED_CFTYPEREF_H_ | |
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Chromium Code Reviews
Issue 3855001:
Move scoped_cftyperef from base to base/mac, use the new namespace, and name ... (Closed)
Base URL: svn://chrome-svn/chrome/trunk/src/