зеркало из https://github.com/mozilla/gecko-dev.git
101 строка
1.8 KiB
C++
101 строка
1.8 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// Utility functions to help with Apple API calls.
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#ifndef mozilla_AppleUtils_h
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#define mozilla_AppleUtils_h
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#include "mozilla/Attributes.h"
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namespace mozilla {
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// Wrapper class to call CFRelease on reference types
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// when they go out of scope.
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template <class T>
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class AutoCFRelease
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{
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public:
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MOZ_IMPLICIT AutoCFRelease(T aRef)
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: mRef(aRef)
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{
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}
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~AutoCFRelease()
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{
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if (mRef) {
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CFRelease(mRef);
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}
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}
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// Return the wrapped ref so it can be used as an in parameter.
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operator T()
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{
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return mRef;
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}
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// Return a pointer to the wrapped ref for use as an out parameter.
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T* receive()
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{
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return &mRef;
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}
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private:
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// Copy operator isn't supported and is not implemented.
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AutoCFRelease<T>& operator=(const AutoCFRelease<T>&);
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T mRef;
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};
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// CFRefPtr: A CoreFoundation smart pointer.
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template <class T>
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class CFRefPtr
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{
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public:
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explicit CFRefPtr(T aRef)
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: mRef(aRef)
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{
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if (mRef) {
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CFRetain(mRef);
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}
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}
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// Copy constructor.
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CFRefPtr(const CFRefPtr<T>& aCFRefPtr)
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: mRef(aCFRefPtr.mRef)
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{
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if (mRef) {
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CFRetain(mRef);
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}
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}
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// Copy operator
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CFRefPtr<T>& operator=(const CFRefPtr<T>& aCFRefPtr)
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{
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if (mRef == aCFRefPtr.mRef) {
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return;
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}
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if (mRef) {
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CFRelease(mRef);
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}
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mRef = aCFRefPtr.mRef;
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if (mRef) {
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CFRetain(mRef);
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}
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return *this;
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}
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~CFRefPtr()
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{
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if (mRef) {
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CFRelease(mRef);
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}
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}
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// Return the wrapped ref so it can be used as an in parameter.
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operator T()
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{
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return mRef;
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}
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private:
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T mRef;
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};
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} // namespace mozilla
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#endif // mozilla_AppleUtils_h
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