root/lang/c/msgpack/trunk/cpp/zone.cpp @ 18782

//
// MessagePack for C++ memory pool
//
// Copyright (C) 2008 FURUHASHI Sadayuki
//
//    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.
//
#include "zone.hpp"

namespace msgpack {


void* zone::alloc()
{
        if(m_pool.size()*ZONE_CHUNK_SIZE <= m_used) {
                cell_t* chunk = (cell_t*)malloc(sizeof(cell_t)*ZONE_CHUNK_SIZE);
                if(!chunk) { throw std::bad_alloc(); }
                try {
                        m_pool.push_back(chunk);
                } catch (...) {
                        free(chunk);
                        throw;
                }
        }
        void* data = m_pool[m_used/ZONE_CHUNK_SIZE][m_used%ZONE_CHUNK_SIZE].data;
        ++m_used;
        return data;
}

void zone::clear()
{
        if(!m_pool.empty()) {
                for(size_t b=0; b < m_used/ZONE_CHUNK_SIZE; ++b) {
                        cell_t* c(m_pool[b]);
                        for(size_t e=0; e < ZONE_CHUNK_SIZE; ++e) {
                                reinterpret_cast<object_class*>(c[e].data)->~object_class();
                        }
                }
                cell_t* c(m_pool.back());
                for(size_t e=0; e < m_used%ZONE_CHUNK_SIZE; ++e) {
                        reinterpret_cast<object_class*>(c[e].data)->~object_class();
                }

                for(pool_t::iterator it(m_pool.begin()), it_end(m_pool.end());
                                it != it_end;
                                ++it) {
                        free(*it);
                }
                m_pool.clear();
        }
        m_used = 0;

        for(user_finalizer_t::reverse_iterator it(m_user_finalizer.rbegin()), it_end(m_user_finalizer.rend());
                        it != it_end;
                        ++it) {
                it->call();
        }
        m_user_finalizer.clear();
}


}  // namespace msgpack