Danny Robson
f6056153e3
This places, at long last, the core library code into the same namespace as the extended library code.
71 lines
1.7 KiB
C++
71 lines
1.7 KiB
C++
/*
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* 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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*
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* Copyright 2015 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef CRUFT_UTIL_ALLOC_RAW_NULL_HPP
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#define CRUFT_UTIL_ALLOC_RAW_NULL_HPP
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#include "../../view.hpp"
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#include <cstddef>
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namespace cruft::alloc::raw {
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// allocator that always fails, throwing bad_alloc. deallocate will
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// succeed with nullptr as with delete, but is undefined with other values
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// (it is likely to at least assert).
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class null {
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public:
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null () = default;
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null (const null&) = delete;
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null& operator= (const null&) = delete;
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template <typename T>
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cruft::view<T*>
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allocate (size_t count)
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{
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return allocate<T> (count, alignof (T));
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}
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template <typename T>
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cruft::view<T*>
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allocate (size_t count, size_t align)
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{
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(void)count;
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(void)align;
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throw std::bad_alloc ();
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}
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template <typename T>
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void
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deallocate (cruft::view<T*> ptr)
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{
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(void)ptr;
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CHECK_EQ (ptr.data (), static_cast<const void*> (nullptr));
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}
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cruft::view<std::byte*> data (void);
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cruft::view<const std::byte*> data (void) const;
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std::byte* begin (void);
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const std::byte* begin (void) const;
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std::byte* end (void);
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const std::byte* end (void) const;
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size_t offset (const void*) const;
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void reset (void);
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size_t capacity (void) const;
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size_t used (void) const;
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size_t remain (void) const;
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};
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}
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#endif
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