| 1 | //===-- CFUtils.h -----------------------------------------------*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // Created by Greg Clayton on 3/5/07. |
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| 10 | // |
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| 11 | //===----------------------------------------------------------------------===// |
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| 12 | |
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| 13 | #ifndef LLDB_TOOLS_DEBUGSERVER_SOURCE_MACOSX_CFUTILS_H |
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| 14 | #define LLDB_TOOLS_DEBUGSERVER_SOURCE_MACOSX_CFUTILS_H |
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| 15 | |
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| 16 | #include <CoreFoundation/CoreFoundation.h> |
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| 17 | |
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| 18 | // Templatized CF helper class that can own any CF pointer and will |
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| 19 | // call CFRelease() on any valid pointer it owns unless that pointer is |
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| 20 | // explicitly released using the release() member function. |
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| 21 | template <class T> class CFReleaser { |
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| 22 | public: |
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| 23 | // Type names for the value |
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| 24 | typedef T element_type; |
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| 25 | |
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| 26 | // Constructors and destructors |
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| 27 | CFReleaser(T ptr = NULL) : _ptr(ptr) {} |
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| 28 | CFReleaser(const CFReleaser ©) : _ptr(copy.get()) { |
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| 29 | if (get()) |
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| 30 | ::CFRetain(get()); |
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| 31 | } |
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| 32 | virtual ~CFReleaser() { reset(); } |
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| 33 | |
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| 34 | // Assignments |
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| 35 | CFReleaser &operator=(const CFReleaser<T> ©) { |
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| 36 | if (copy != *this) { |
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| 37 | // Replace our owned pointer with the new one |
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| 38 | reset(ptr: copy.get()); |
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| 39 | // Retain the current pointer that we own |
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| 40 | if (get()) |
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| 41 | ::CFRetain(get()); |
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| 42 | } |
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| 43 | } |
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| 44 | // Get the address of the contained type |
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| 45 | T *ptr_address() { return &_ptr; } |
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| 46 | |
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| 47 | // Access the pointer itself |
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| 48 | const T get() const { return _ptr; } |
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| 49 | T get() { return _ptr; } |
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| 50 | |
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| 51 | // Set a new value for the pointer and CFRelease our old |
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| 52 | // value if we had a valid one. |
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| 53 | void reset(T ptr = NULL) { |
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| 54 | if (ptr != _ptr) { |
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| 55 | if (_ptr != NULL) |
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| 56 | ::CFRelease(_ptr); |
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| 57 | _ptr = ptr; |
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| 58 | } |
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| 59 | } |
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| 60 | |
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| 61 | // Release ownership without calling CFRelease |
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| 62 | T release() { |
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| 63 | T tmp = _ptr; |
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| 64 | _ptr = NULL; |
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| 65 | return tmp; |
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| 66 | } |
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| 67 | |
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| 68 | private: |
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| 69 | element_type _ptr; |
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| 70 | }; |
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| 71 | |
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| 72 | #endif // LLDB_TOOLS_DEBUGSERVER_SOURCE_MACOSX_CFUTILS_H |
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| 73 | |
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