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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Scopers help you manage ownership of a pointer, helping you easily manage a | 5 // Scopers help you manage ownership of a pointer, helping you easily manage a |
6 // pointer within a scope, and automatically destroying the pointer at the end | 6 // pointer within a scope, and automatically destroying the pointer at the end |
7 // of a scope. There are two main classes you will use, which correspond to the | 7 // of a scope. There are two main classes you will use, which correspond to the |
8 // operators new/delete and new[]/delete[]. | 8 // operators new/delete and new[]/delete[]. |
9 // | 9 // |
10 // Example usage (scoped_ptr<T>): | 10 // Example usage (scoped_ptr<T>): |
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93 // TODO(dcheng): Clean up these headers, but there are likely lots of existing | 93 // TODO(dcheng): Clean up these headers, but there are likely lots of existing |
94 // IWYU violations. | 94 // IWYU violations. |
95 #include <stddef.h> | 95 #include <stddef.h> |
96 #include <stdlib.h> | 96 #include <stdlib.h> |
97 | 97 |
98 #include <iosfwd> | 98 #include <iosfwd> |
99 #include <memory> | 99 #include <memory> |
100 #include <type_traits> | 100 #include <type_traits> |
101 #include <utility> | 101 #include <utility> |
102 | 102 |
103 #include "base/compiler_specific.h" | |
104 #include "base/logging.h" | 103 #include "base/logging.h" |
105 #include "base/macros.h" | 104 #include "base/macros.h" |
106 #include "base/move.h" | |
107 #include "build/build_config.h" | |
108 | 105 |
109 namespace base { | 106 namespace base { |
110 | 107 |
111 // Function object which invokes 'free' on its parameter, which must be | 108 // Function object which invokes 'free' on its parameter, which must be |
112 // a pointer. Can be used to store malloc-allocated pointers in scoped_ptr: | 109 // a pointer. Can be used to store malloc-allocated pointers in scoped_ptr: |
113 // | 110 // |
114 // scoped_ptr<int, base::FreeDeleter> foo_ptr( | 111 // scoped_ptr<int, base::FreeDeleter> foo_ptr( |
115 // static_cast<int*>(malloc(sizeof(int)))); | 112 // static_cast<int*>(malloc(sizeof(int)))); |
116 struct FreeDeleter { | 113 struct FreeDeleter { |
117 inline void operator()(void* ptr) const { | 114 inline void operator()(void* ptr) const { |
118 free(ptr); | 115 free(ptr); |
119 } | 116 } |
120 }; | 117 }; |
121 | 118 |
122 } // namespace base | 119 } // namespace base |
123 | 120 |
124 template <typename T, typename D = std::default_delete<T>> | 121 template <typename T, typename D = std::default_delete<T>> |
125 using scoped_ptr = std::unique_ptr<T, D>; | 122 using scoped_ptr = std::unique_ptr<T, D>; |
126 | 123 |
127 // A function to convert T* into scoped_ptr<T> | 124 // A function to convert T* into scoped_ptr<T> |
128 // Doing e.g. make_scoped_ptr(new FooBarBaz<type>(arg)) is a shorter notation | 125 // Doing e.g. make_scoped_ptr(new FooBarBaz<type>(arg)) is a shorter notation |
129 // for scoped_ptr<FooBarBaz<type> >(new FooBarBaz<type>(arg)) | 126 // for scoped_ptr<FooBarBaz<type> >(new FooBarBaz<type>(arg)) |
130 template <typename T> | 127 template <typename T> |
131 scoped_ptr<T> make_scoped_ptr(T* ptr) { | 128 scoped_ptr<T> make_scoped_ptr(T* ptr) { |
132 return scoped_ptr<T>(ptr); | 129 return scoped_ptr<T>(ptr); |
133 } | 130 } |
134 | 131 |
135 #endif // BASE_MEMORY_SCOPED_PTR_H_ | 132 #endif // BASE_MEMORY_SCOPED_PTR_H_ |
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