libcruft-util/alloc/null.hpp

41 lines
1.3 KiB
C++

/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Copyright 2015 Danny Robson <danny@nerdcruft.net>
*/
#ifndef __UTIL_ALLOC_NULL_HPP
#define __UTIL_ALLOC_NULL_HPP
#include <cstddef>
namespace util { namespace alloc {
// allocator that always fails, throwing bad_alloc. deallocate will
// succeed with nullptr as with delete, but is undefined with other values
// (it is likely to at least assert).
class null {
public:
void* allocate (size_t bytes, size_t align = alignof (std::max_align_t));
void deallocate (void *ptr, size_t bytes, size_t align = alignof (std::max_align_t));
void reset (void) { ; }
constexpr size_t capacity (void) const { return 0u; }
constexpr size_t used (void) const { return 0u; }
constexpr size_t remain (void) const { return 0u; }
};
} }
#endif