2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
78 lines
2.1 KiB
C++
78 lines
2.1 KiB
C++
//===-- CFUtils.h -----------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Created by Greg Clayton on 3/5/07.
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//
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//===----------------------------------------------------------------------===//
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#ifndef __CFUtils_h__
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#define __CFUtils_h__
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#include <CoreFoundation/CoreFoundation.h>
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#ifdef __cplusplus
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//----------------------------------------------------------------------
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// Templatized CF helper class that can own any CF pointer and will
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// call CFRelease() on any valid pointer it owns unless that pointer is
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// explicitly released using the release() member function.
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//----------------------------------------------------------------------
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template <class T> class CFReleaser {
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public:
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// Type names for the avlue
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typedef T element_type;
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// Constructors and destructors
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CFReleaser(T ptr = NULL) : _ptr(ptr) {}
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CFReleaser(const CFReleaser ©) : _ptr(copy.get()) {
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if (get())
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::CFRetain(get());
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}
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virtual ~CFReleaser() { reset(); }
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// Assignments
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CFReleaser &operator=(const CFReleaser<T> ©) {
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if (copy != *this) {
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// Replace our owned pointer with the new one
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reset(copy.get());
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// Retain the current pointer that we own
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if (get())
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::CFRetain(get());
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}
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}
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// Get the address of the contained type
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T *ptr_address() { return &_ptr; }
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// Access the pointer itself
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const T get() const { return _ptr; }
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T get() { return _ptr; }
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// Set a new value for the pointer and CFRelease our old
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// value if we had a valid one.
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void reset(T ptr = NULL) {
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if (ptr != _ptr) {
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if (_ptr != NULL)
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::CFRelease(_ptr);
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_ptr = ptr;
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}
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}
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// Release ownership without calling CFRelease
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T release() {
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T tmp = _ptr;
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_ptr = NULL;
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return tmp;
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}
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private:
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element_type _ptr;
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};
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#endif // #ifdef __cplusplus
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#endif // #ifndef __CFUtils_h__
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