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| 1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 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 #ifndef BASE_SCOPED_VARIANT_WIN_H_ | 5 #ifndef BASE_SCOPED_VARIANT_WIN_H_ |
| 6 #define BASE_SCOPED_VARIANT_WIN_H_ | 6 #define BASE_SCOPED_VARIANT_WIN_H_ |
| 7 #pragma once | 7 #pragma once |
| 8 | 8 |
| 9 #include <windows.h> | 9 #include <windows.h> |
| 10 #include <oleauto.h> | 10 #include <oleauto.h> |
| 11 | 11 |
| 12 #include "base/basictypes.h" // needed to pick up OS_WIN | 12 #include "base/basictypes.h" |
| 13 #include "base/logging.h" | 13 #include "build/build_config.h" |
| 14 | 14 |
| 15 // Scoped VARIANT class for automatically freeing a COM VARIANT at the | 15 // Scoped VARIANT class for automatically freeing a COM VARIANT at the |
| 16 // end of a scope. Additionally provides a few functions to make the | 16 // end of a scope. Additionally provides a few functions to make the |
| 17 // encapsulated VARIANT easier to use. | 17 // encapsulated VARIANT easier to use. |
| 18 // Instead of inheriting from VARIANT, we take the containment approach | 18 // Instead of inheriting from VARIANT, we take the containment approach |
| 19 // in order to have more control over the usage of the variant and guard | 19 // in order to have more control over the usage of the variant and guard |
| 20 // against memory leaks. | 20 // against memory leaks. |
| 21 class ScopedVariant { | 21 class ScopedVariant { |
| 22 public: | 22 public: |
| 23 // Declaration of a global variant variable that's always VT_EMPTY | 23 // Declaration of a global variant variable that's always VT_EMPTY |
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| 152 | 152 |
| 153 private: | 153 private: |
| 154 // Comparison operators for ScopedVariant are not supported at this point. | 154 // Comparison operators for ScopedVariant are not supported at this point. |
| 155 // Use the Compare method instead. | 155 // Use the Compare method instead. |
| 156 bool operator==(const ScopedVariant& var) const; | 156 bool operator==(const ScopedVariant& var) const; |
| 157 bool operator!=(const ScopedVariant& var) const; | 157 bool operator!=(const ScopedVariant& var) const; |
| 158 DISALLOW_COPY_AND_ASSIGN(ScopedVariant); | 158 DISALLOW_COPY_AND_ASSIGN(ScopedVariant); |
| 159 }; | 159 }; |
| 160 | 160 |
| 161 #endif // BASE_SCOPED_VARIANT_WIN_H_ | 161 #endif // BASE_SCOPED_VARIANT_WIN_H_ |
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