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128 lines
2.6 KiB
Plaintext
128 lines
2.6 KiB
Plaintext
//
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// MessagePack for C++ memory pool
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//
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// Copyright (C) 2008-2009 FURUHASHI Sadayuki
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//
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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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#ifndef MSGPACK_ZONE_HPP__
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#define MSGPACK_ZONE_HPP__
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#include "msgpack/object.hpp"
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#include "msgpack/zone.h"
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#include <cstdlib>
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#include <vector>
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<% GENERATION_LIMIT = 15 %>
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namespace msgpack {
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class zone : public msgpack_zone {
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public:
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zone(size_t chunk_size = MSGPACK_ZONE_CHUNK_SIZE);
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~zone();
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public:
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void* malloc(size_t size);
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void push_finalizer(void (*func)(void*), void* data);
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void clear();
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<%0.upto(GENERATION_LIMIT) {|i|%>
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template <typename T<%1.upto(i) {|j|%>, typename A<%=j%><%}%>>
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T* allocate(<%=(1..i).map{|j|"A#{j} a#{j}"}.join(', ')%>);
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<%}%>
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private:
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void undo_malloc(size_t size);
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template <typename T>
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static void object_destructor(void* obj);
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typedef msgpack_zone base;
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private:
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zone(const zone&);
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};
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inline zone::zone(size_t chunk_size)
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{
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msgpack_zone_init(this, chunk_size);
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}
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inline zone::~zone()
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{
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msgpack_zone_destroy(this);
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}
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inline void* zone::malloc(size_t size)
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{
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void* ptr = msgpack_zone_malloc(this, size);
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if(!ptr) {
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throw std::bad_alloc();
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}
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return ptr;
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}
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inline void zone::push_finalizer(void (*func)(void*), void* data)
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{
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if(!msgpack_zone_push_finalizer(this, func, data)) {
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throw std::bad_alloc();
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}
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}
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inline void zone::clear()
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{
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msgpack_zone_clear(this);
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}
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template <typename T>
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void zone::object_destructor(void* obj)
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{
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reinterpret_cast<T*>(obj)->~T();
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}
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inline void zone::undo_malloc(size_t size)
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{
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msgpack_zone_chunk* chunk = base::chunk_array.tail;
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chunk->ptr -= size;
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chunk->free += size;
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}
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<%0.upto(GENERATION_LIMIT) {|i|%>
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template <typename T<%1.upto(i) {|j|%>, typename A<%=j%><%}%>>
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T* zone::allocate(<%=(1..i).map{|j|"A#{j} a#{j}"}.join(', ')%>)
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{
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void* x = malloc(sizeof(T));
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if(!msgpack_zone_push_finalizer(this, &zone::object_destructor<T>, x)) {
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undo_malloc(sizeof(T));
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throw std::bad_alloc();
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}
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try {
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return new (x) T(<%=(1..i).map{|j|"a#{j}"}.join(', ')%>);
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} catch (...) {
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--base::finalizer_array.tail;
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undo_malloc(sizeof(T));
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throw;
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}
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}
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<%}%>
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} // namespace msgpack
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#endif /* msgpack/zone.hpp */
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