| //===-- CFUtils.h -----------------------------------------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // Created by Greg Clayton on 3/5/07. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef __CFUtils_h__ |
| #define __CFUtils_h__ |
| |
| #include <CoreFoundation/CoreFoundation.h> |
| |
| #ifdef __cplusplus |
| |
| // Templatized CF helper class that can own any CF pointer and will |
| // call CFRelease() on any valid pointer it owns unless that pointer is |
| // explicitly released using the release() member function. |
| template <class T> class CFReleaser { |
| public: |
| // Type names for the avlue |
| typedef T element_type; |
| |
| // Constructors and destructors |
| CFReleaser(T ptr = NULL) : _ptr(ptr) {} |
| CFReleaser(const CFReleaser ©) : _ptr(copy.get()) { |
| if (get()) |
| ::CFRetain(get()); |
| } |
| virtual ~CFReleaser() { reset(); } |
| |
| // Assignments |
| CFReleaser &operator=(const CFReleaser<T> ©) { |
| if (copy != *this) { |
| // Replace our owned pointer with the new one |
| reset(copy.get()); |
| // Retain the current pointer that we own |
| if (get()) |
| ::CFRetain(get()); |
| } |
| } |
| // Get the address of the contained type |
| T *ptr_address() { return &_ptr; } |
| |
| // Access the pointer itself |
| const T get() const { return _ptr; } |
| T get() { return _ptr; } |
| |
| // Set a new value for the pointer and CFRelease our old |
| // value if we had a valid one. |
| void reset(T ptr = NULL) { |
| if (ptr != _ptr) { |
| if (_ptr != NULL) |
| ::CFRelease(_ptr); |
| _ptr = ptr; |
| } |
| } |
| |
| // Release ownership without calling CFRelease |
| T release() { |
| T tmp = _ptr; |
| _ptr = NULL; |
| return tmp; |
| } |
| |
| private: |
| element_type _ptr; |
| }; |
| |
| #endif // #ifdef __cplusplus |
| #endif // #ifndef __CFUtils_h__ |
