Chris@102: //////////////////////////////////////////////////////////////////////////////
Chris@102: //
Chris@102: // (C) Copyright Ion Gaztanaga 2005-2013. Distributed under the Boost
Chris@102: // Software License, Version 1.0. (See accompanying file
Chris@102: // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@102: //
Chris@102: // See http://www.boost.org/libs/container for documentation.
Chris@102: //
Chris@102: //////////////////////////////////////////////////////////////////////////////
Chris@102: 
Chris@102: #ifndef BOOST_CONTAINER_DETAIL_NODE_POOL_HPP
Chris@102: #define BOOST_CONTAINER_DETAIL_NODE_POOL_HPP
Chris@102: 
Chris@102: #ifndef BOOST_CONFIG_HPP
Chris@102: #  include <boost/config.hpp>
Chris@102: #endif
Chris@102: 
Chris@102: #if defined(BOOST_HAS_PRAGMA_ONCE)
Chris@102: #  pragma once
Chris@102: #endif
Chris@102: 
Chris@102: #include <boost/container/detail/config_begin.hpp>
Chris@102: #include <boost/container/detail/workaround.hpp>
Chris@102: 
Chris@102: #include <boost/container/detail/mutex.hpp>
Chris@102: #include <boost/container/detail/pool_common_alloc.hpp>
Chris@102: #include <boost/container/detail/node_pool_impl.hpp>
Chris@102: #include <boost/container/detail/mutex.hpp>
Chris@102: #include <boost/move/utility_core.hpp>
Chris@102: #include <cstddef>
Chris@102: #include <cassert>
Chris@102: 
Chris@102: namespace boost {
Chris@102: namespace container {
Chris@102: namespace container_detail {
Chris@102: 
Chris@102: //!Pooled memory allocator using single segregated storage. Includes
Chris@102: //!a reference count but the class does not delete itself, this is
Chris@102: //!responsibility of user classes. Node size (NodeSize) and the number of
Chris@102: //!nodes allocated per block (NodesPerBlock) are known at compile time
Chris@102: template< std::size_t NodeSize, std::size_t NodesPerBlock >
Chris@102: class private_node_pool
Chris@102:    //Inherit from the implementation to avoid template bloat
Chris@102:    :  public boost::container::container_detail::
Chris@102:          private_node_pool_impl<fake_segment_manager>
Chris@102: {
Chris@102:    typedef boost::container::container_detail::
Chris@102:       private_node_pool_impl<fake_segment_manager>   base_t;
Chris@102:    //Non-copyable
Chris@102:    private_node_pool(const private_node_pool &);
Chris@102:    private_node_pool &operator=(const private_node_pool &);
Chris@102: 
Chris@102:    public:
Chris@102:    typedef typename base_t::multiallocation_chain multiallocation_chain;
Chris@102:    static const std::size_t nodes_per_block = NodesPerBlock;
Chris@102: 
Chris@102:    //!Constructor from a segment manager. Never throws
Chris@102:    private_node_pool()
Chris@102:       :  base_t(0, NodeSize, NodesPerBlock)
Chris@102:    {}
Chris@102: 
Chris@102: };
Chris@102: 
Chris@102: template< std::size_t NodeSize
Chris@102:         , std::size_t NodesPerBlock
Chris@102:         >
Chris@102: class shared_node_pool
Chris@102:    : public private_node_pool<NodeSize, NodesPerBlock>
Chris@102: {
Chris@102:    private:
Chris@102:    typedef private_node_pool<NodeSize, NodesPerBlock> private_node_allocator_t;
Chris@102: 
Chris@102:    public:
Chris@102:    typedef typename private_node_allocator_t::free_nodes_t  free_nodes_t;
Chris@102:    typedef typename private_node_allocator_t::multiallocation_chain multiallocation_chain;
Chris@102: 
Chris@102:    //!Constructor from a segment manager. Never throws
Chris@102:    shared_node_pool()
Chris@102:    : private_node_allocator_t(){}
Chris@102: 
Chris@102:    //!Destructor. Deallocates all allocated blocks. Never throws
Chris@102:    ~shared_node_pool()
Chris@102:    {}
Chris@102: 
Chris@102:    //!Allocates array of count elements. Can throw std::bad_alloc
Chris@102:    void *allocate_node()
Chris@102:    {
Chris@102:       //-----------------------
Chris@102:       scoped_lock<default_mutex> guard(mutex_);
Chris@102:       //-----------------------
Chris@102:       return private_node_allocator_t::allocate_node();
Chris@102:    }
Chris@102: 
Chris@102:    //!Deallocates an array pointed by ptr. Never throws
Chris@102:    void deallocate_node(void *ptr)
Chris@102:    {
Chris@102:       //-----------------------
Chris@102:       scoped_lock<default_mutex> guard(mutex_);
Chris@102:       //-----------------------
Chris@102:       private_node_allocator_t::deallocate_node(ptr);
Chris@102:    }
Chris@102: 
Chris@102:    //!Allocates a singly linked list of n nodes ending in null pointer.
Chris@102:    //!can throw std::bad_alloc
Chris@102:    void allocate_nodes(const std::size_t n, multiallocation_chain &chain)
Chris@102:    {
Chris@102:       //-----------------------
Chris@102:       scoped_lock<default_mutex> guard(mutex_);
Chris@102:       //-----------------------
Chris@102:       return private_node_allocator_t::allocate_nodes(n, chain);
Chris@102:    }
Chris@102: 
Chris@102:    void deallocate_nodes(multiallocation_chain &chain)
Chris@102:    {
Chris@102:       //-----------------------
Chris@102:       scoped_lock<default_mutex> guard(mutex_);
Chris@102:       //-----------------------
Chris@102:       private_node_allocator_t::deallocate_nodes(chain);
Chris@102:    }
Chris@102: 
Chris@102:    //!Deallocates all the free blocks of memory. Never throws
Chris@102:    void deallocate_free_blocks()
Chris@102:    {
Chris@102:       //-----------------------
Chris@102:       scoped_lock<default_mutex> guard(mutex_);
Chris@102:       //-----------------------
Chris@102:       private_node_allocator_t::deallocate_free_blocks();
Chris@102:    }
Chris@102: 
Chris@102:    //!Deallocates all blocks. Never throws
Chris@102:    void purge_blocks()
Chris@102:    {
Chris@102:       //-----------------------
Chris@102:       scoped_lock<default_mutex> guard(mutex_);
Chris@102:       //-----------------------
Chris@102:       private_node_allocator_t::purge_blocks();
Chris@102:    }
Chris@102: 
Chris@102:    std::size_t num_free_nodes()
Chris@102:    {
Chris@102:       //-----------------------
Chris@102:       scoped_lock<default_mutex> guard(mutex_);
Chris@102:       //-----------------------
Chris@102:       return private_node_allocator_t::num_free_nodes();
Chris@102:    }
Chris@102: 
Chris@102:    private:
Chris@102:    default_mutex mutex_;
Chris@102: };
Chris@102: 
Chris@102: }  //namespace container_detail {
Chris@102: }  //namespace container {
Chris@102: }  //namespace boost {
Chris@102: 
Chris@102: #include <boost/container/detail/config_end.hpp>
Chris@102: 
Chris@102: #endif   //#ifndef BOOST_CONTAINER_DETAIL_NODE_POOL_HPP