-#pragma once
-
-/******************************************************************************
-*
-* Copyright (c) 2019 AT&T Intellectual Property.
-* Copyright (c) 2018-2019 Nokia.
-*
-* 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.
-*
-******************************************************************************/
-
-// Standard Includes: ANSI C/C++, MSA, and Third-Party Libraries
-#include <new>
-#include <memory>
-
-// Local Includes: Application specific classes, functions, and libraries
-
-namespace asn
-{
-
-struct allocator
-{
- allocator() = default;
-
- allocator(void* data, size_t size) { reset(data, size); }
-
- template <typename T, std::size_t SZ>
- explicit allocator(T (&buf)[SZ]) : allocator(buf, SZ * sizeof(T)) { }
-
- void reset(void* data, size_t size)
- {
- std::size_t space = size;
- m_begin = static_cast<uint8_t*>(std::align(alignment, size, data, space));
- m_end = m_begin ? m_begin + space : nullptr;
- m_current = m_begin;
- m_ref_counter = 0;
- }
-
- uint8_t* alloc_bytes(std::size_t size)
- {
- std::size_t const esize = (size + alignment - 1) & -alignment;
- if (m_current + esize > m_end) { return nullptr; } //throw std::bad_alloc();
-
- uint8_t* const rval = m_current;
- m_current += esize;
- return rval;
- }
-
- size_t add_ref() { return ++m_ref_counter; }
- size_t release()
- {
- if (m_ref_counter) --m_ref_counter;
- if (m_ref_counter == 0) reset();
- return m_ref_counter;
- }
- size_t ref_counter() const { return m_ref_counter; }
-private:
- //called by last release() when m_ref_counter becomes 0
- void reset()
- {
- m_current = m_begin;
- }
-
-
- enum : std::size_t
- {
- alignment = alignof(std::size_t)
- };
-
- uint8_t* m_begin { nullptr }; //set in reset()
- uint8_t* m_current { nullptr }; //changed by alloc_bytes
- uint8_t* m_end { nullptr };
-
- size_t m_ref_counter {0};
-};
-
-} //namespace asn
-