41b6d83e6a
It can be difficult to correctly parse the syntax for copy/move and the associated assignment operators. Provide helpers as syntactic sugar to facilitate disabling either the copy constructor, and copy assignment operator, and the move constructor and move assignment operator in a way which is explicit and clear. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
106 lines
1.9 KiB
C++
106 lines
1.9 KiB
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2020, Google Inc.
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*
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* class.h - Utilities and helpers for classes
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*/
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#ifndef __LIBCAMERA_CLASS_H__
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#define __LIBCAMERA_CLASS_H__
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#include <memory>
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namespace libcamera {
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#ifndef __DOXYGEN__
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#define LIBCAMERA_DISABLE_COPY(klass) \
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klass(const klass &) = delete; \
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klass &operator=(const klass &) = delete;
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#define LIBCAMERA_DISABLE_MOVE(klass) \
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klass(klass &&) = delete; \
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klass &operator=(klass &&) = delete;
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#define LIBCAMERA_DISABLE_COPY_AND_MOVE(klass) \
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LIBCAMERA_DISABLE_COPY(klass) \
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LIBCAMERA_DISABLE_MOVE(klass)
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#else
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#define LIBCAMERA_DISABLE_COPY(klass)
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#define LIBCAMERA_DISABLE_MOVE(klass)
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#define LIBCAMERA_DISABLE_COPY_AND_MOVE(klass)
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#endif
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#ifndef __DOXYGEN__
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#define LIBCAMERA_DECLARE_PRIVATE(klass) \
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public: \
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class Private; \
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friend class Private;
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#define LIBCAMERA_DECLARE_PUBLIC(klass) \
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friend class klass; \
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using Public = klass;
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#define LIBCAMERA_D_PTR() \
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_d<Private>();
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#define LIBCAMERA_O_PTR() \
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_o<Public>();
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#else
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#define LIBCAMERA_DECLARE_PRIVATE(klass)
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#define LIBCAMERA_DECLARE_PUBLIC(klass)
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#define LIBCAMERA_D_PTR(klass)
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#define LIBCAMERA_O_PTR(klass)
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#endif
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class Extensible
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{
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public:
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class Private
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{
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public:
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Private(Extensible *o);
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virtual ~Private();
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#ifndef __DOXYGEN__
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template<typename T>
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const T *_o() const
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{
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return static_cast<const T *>(o_);
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}
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template<typename T>
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T *_o()
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{
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return static_cast<T *>(o_);
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}
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#endif
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private:
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Extensible *const o_;
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};
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Extensible(Private *d);
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protected:
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#ifndef __DOXYGEN__
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template<typename T>
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const T *_d() const
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{
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return static_cast<const T *>(d_.get());
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}
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template<typename T>
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T *_d()
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{
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return static_cast<T *>(d_.get());
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}
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#endif
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private:
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const std::unique_ptr<Private> d_;
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};
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} /* namespace libcamera */
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#endif /* __LIBCAMERA_CLASS_H__ */
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