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_MAC_SCOPED_AEDESC_H_ 6 #define BASE_MAC_SCOPED_AEDESC_H_ 7 #pragma once 8 9 #import <CoreServices/CoreServices.h> 10 11 #include "base/basictypes.h" 12 13 namespace base { 14 namespace mac { 15 16 // The ScopedAEDesc is used to scope AppleEvent descriptors. On creation, 17 // it will store a NULL descriptor. On destruction, it will dispose of the 18 // descriptor. 19 // 20 // This class is parameterized for additional type safety checks. You can use 21 // the generic AEDesc type by not providing a template parameter: 22 // ScopedAEDesc<> desc; 23 template <typename AEDescType = AEDesc> 24 class ScopedAEDesc { 25 public: ScopedAEDesc()26 ScopedAEDesc() { 27 AECreateDesc(typeNull, NULL, 0, &desc_); 28 } 29 ~ScopedAEDesc()30 ~ScopedAEDesc() { 31 AEDisposeDesc(&desc_); 32 } 33 34 // Used for in parameters. 35 operator const AEDescType*() { 36 return &desc_; 37 } 38 39 // Used for out parameters. OutPointer()40 AEDescType* OutPointer() { 41 return &desc_; 42 } 43 44 private: 45 AEDescType desc_; 46 47 DISALLOW_COPY_AND_ASSIGN(ScopedAEDesc); 48 }; 49 50 } // namespace mac 51 } // namespace base 52 53 #endif // BASE_MAC_SCOPED_AEDESC_H_ 54