62 lines
2.0 KiB
C++
62 lines
2.0 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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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 util::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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util::view<std::byte*> allocate (size_t bytes);
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util::view<std::byte*> allocate (size_t bytes, size_t align);
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void deallocate (util::view<std::byte*> ptr) { return deallocate (ptr.data (), ptr.size ()); }
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void deallocate (util::view<std::byte*> ptr, size_t alignment) { return deallocate (ptr.data (), ptr.size (), alignment); }
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void deallocate (void *ptr, size_t bytes);
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void deallocate (void *ptr, size_t bytes, size_t align);
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util::view<std::byte*> data (void);
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util::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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