44 lines
1.4 KiB
C++
44 lines
1.4 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 __UTIL_ALLOC_NULL_HPP
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#define __UTIL_ALLOC_NULL_HPP
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#include <cstddef>
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namespace util::alloc {
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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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void* allocate (size_t bytes, size_t align = alignof (std::max_align_t));
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void deallocate (void *ptr, size_t bytes, size_t align = alignof (std::max_align_t));
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constexpr void* base (void) { return nullptr; }
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constexpr size_t offset (const void*) const { return 0; }
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void reset (void) { ; }
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constexpr size_t capacity (void) const { return 0u; }
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constexpr size_t used (void) const { return 0u; }
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constexpr size_t remain (void) const { return 0u; }
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};
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}
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#endif
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