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| 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 |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef BASE_SCOPED_AEDESC_H_ |
| 6 #define BASE_SCOPED_AEDESC_H_ |
| 7 #pragma once |
| 8 |
| 9 #import <CoreServices/CoreServices.h> |
| 10 |
| 11 #include "base/basictypes.h" |
| 12 |
| 13 // The scoped_aedesc is used to scope AppleEvent descriptors. On creation, |
| 14 // it will store a NULL descriptor. On destruction, it will dispose of the |
| 15 // descriptor. |
| 16 // |
| 17 // This class is parameterized for additional type safety checks. You can use |
| 18 // the generic AEDesc type by not providing a template parameter: |
| 19 // scoped_aedesc<> desc; |
| 20 template <typename AEDescType = AEDesc> |
| 21 class scoped_aedesc { |
| 22 public: |
| 23 scoped_aedesc() { |
| 24 AECreateDesc(typeNull, NULL, 0, &desc_); |
| 25 } |
| 26 |
| 27 ~scoped_aedesc() { |
| 28 AEDisposeDesc(&desc_); |
| 29 } |
| 30 |
| 31 // Used for in parameters. |
| 32 operator const AEDescType*() { |
| 33 return &desc_; |
| 34 } |
| 35 |
| 36 // Used for out parameters. |
| 37 AEDescType* OutPointer() { |
| 38 return &desc_; |
| 39 } |
| 40 |
| 41 private: |
| 42 AEDescType desc_; |
| 43 |
| 44 DISALLOW_COPY_AND_ASSIGN(scoped_aedesc); |
| 45 }; |
| 46 |
| 47 #endif // BASE_SCOPED_AEDESC_H_ |
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