68 lines
1.8 KiB
C++
68 lines
1.8 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: wx/unix/private/x11ptr.h
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// Purpose: Simple RAII helper for calling XFree() automatically
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// Author: Vadim Zeitlin
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// Created: 2025-04-28
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// Copyright: (c) 2025 Vadim Zeitlin <vadim@wxwidgets.org>
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_UNIX_PRIVATE_X11PTR_H_
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#define _WX_UNIX_PRIVATE_X11PTR_H_
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#include <X11/Xlib.h>
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// ----------------------------------------------------------------------------
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// Convenience class for calling XFree() automatically
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// ----------------------------------------------------------------------------
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template <typename T>
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class wxX11Ptr
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{
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public:
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wxX11Ptr() = default;
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explicit wxX11Ptr(const T *p) : m_ptr(const_cast<T*>(p)) { }
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wxX11Ptr(wxX11Ptr&& other) : m_ptr(other.m_ptr) { other.m_ptr = nullptr; }
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~wxX11Ptr() { reset(); }
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wxX11Ptr& operator=(wxX11Ptr&& other)
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{
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if ( &other != this )
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{
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reset(other.m_ptr);
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other.m_ptr = nullptr;
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}
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return *this;
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}
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const T* get() const { return m_ptr; }
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operator const T*() const { return m_ptr; }
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T* operator->() const { return m_ptr; }
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void reset(T* p = nullptr)
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{
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if ( m_ptr )
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XFree(m_ptr);
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m_ptr = p;
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}
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T** Out()
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{
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wxASSERT_MSG( !m_ptr, wxS("Can't reuse the same object.") );
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return &m_ptr;
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}
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private:
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// We store the pointer as non-const because it avoids casts in the dtor
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// and Out(), but it's actually always handled as a const one.
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T* m_ptr = nullptr;
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wxDECLARE_NO_COPY_CLASS(wxX11Ptr);
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};
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#endif // _WX_UNIX_PRIVATE_X11PTR_H_
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