350 lines
14 KiB
C++
350 lines
14 KiB
C++
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// (C) Copyright Ion Gaztanaga 2005-2013. Distributed under the Boost
|
|
// Software License, Version 1.0. (See accompanying file
|
|
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
//
|
|
// See http://www.boost.org/libs/container for documentation.
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef BOOST_CONTAINER_ADAPTIVE_POOL_HPP
|
|
#define BOOST_CONTAINER_ADAPTIVE_POOL_HPP
|
|
|
|
#ifndef BOOST_CONFIG_HPP
|
|
# include <boost/config.hpp>
|
|
#endif
|
|
|
|
#if defined(BOOST_HAS_PRAGMA_ONCE)
|
|
# pragma once
|
|
#endif
|
|
|
|
#include <boost/container/detail/config_begin.hpp>
|
|
#include <boost/container/detail/workaround.hpp>
|
|
#include <boost/container/container_fwd.hpp>
|
|
#include <boost/container/detail/version_type.hpp>
|
|
#include <boost/container/throw_exception.hpp>
|
|
#include <boost/container/detail/adaptive_node_pool.hpp>
|
|
#include <boost/container/detail/multiallocation_chain.hpp>
|
|
#include <boost/container/detail/mpl.hpp>
|
|
#include <boost/container/detail/dlmalloc.hpp>
|
|
#include <boost/container/detail/singleton.hpp>
|
|
#include <boost/container/detail/placement_new.hpp>
|
|
|
|
#include <boost/assert.hpp>
|
|
#include <boost/static_assert.hpp>
|
|
#include <boost/move/utility_core.hpp>
|
|
#include <cstddef>
|
|
|
|
|
|
namespace boost {
|
|
namespace container {
|
|
|
|
//!An STL node allocator that uses a modified DLMalloc as memory
|
|
//!source.
|
|
//!
|
|
//!This node allocator shares a segregated storage between all instances
|
|
//!of adaptive_pool with equal sizeof(T).
|
|
//!
|
|
//!NodesPerBlock is the number of nodes allocated at once when the allocator
|
|
//!needs runs out of nodes. MaxFreeBlocks is the maximum number of totally free blocks
|
|
//!that the adaptive node pool will hold. The rest of the totally free blocks will be
|
|
//!deallocated to the memory manager.
|
|
//!
|
|
//!OverheadPercent is the (approximated) maximum size overhead (1-20%) of the allocator:
|
|
//!(memory usable for nodes / total memory allocated from the memory allocator)
|
|
template < class T
|
|
, std::size_t NodesPerBlock BOOST_CONTAINER_DOCONLY(= ADP_nodes_per_block)
|
|
, std::size_t MaxFreeBlocks BOOST_CONTAINER_DOCONLY(= ADP_max_free_blocks)
|
|
, std::size_t OverheadPercent BOOST_CONTAINER_DOCONLY(= ADP_overhead_percent)
|
|
BOOST_CONTAINER_DOCIGN(BOOST_MOVE_I unsigned Version)
|
|
>
|
|
class adaptive_pool
|
|
{
|
|
//!If Version is 1, the allocator is a STL conforming allocator. If Version is 2,
|
|
//!the allocator offers advanced expand in place and burst allocation capabilities.
|
|
public:
|
|
typedef unsigned int allocation_type;
|
|
typedef adaptive_pool
|
|
<T, NodesPerBlock, MaxFreeBlocks, OverheadPercent
|
|
BOOST_CONTAINER_DOCIGN(BOOST_MOVE_I Version)
|
|
> self_t;
|
|
|
|
static const std::size_t nodes_per_block = NodesPerBlock;
|
|
static const std::size_t max_free_blocks = MaxFreeBlocks;
|
|
static const std::size_t overhead_percent = OverheadPercent;
|
|
static const std::size_t real_nodes_per_block = NodesPerBlock;
|
|
|
|
BOOST_CONTAINER_DOCIGN(BOOST_STATIC_ASSERT((Version <=2)));
|
|
|
|
public:
|
|
//-------
|
|
typedef T value_type;
|
|
typedef T * pointer;
|
|
typedef const T * const_pointer;
|
|
typedef typename ::boost::container::
|
|
container_detail::unvoid_ref<T>::type reference;
|
|
typedef typename ::boost::container::
|
|
container_detail::unvoid_ref<const T>::type const_reference;
|
|
typedef std::size_t size_type;
|
|
typedef std::ptrdiff_t difference_type;
|
|
|
|
typedef boost::container::container_detail::
|
|
version_type<self_t, Version> version;
|
|
|
|
#ifndef BOOST_CONTAINER_DOXYGEN_INVOKED
|
|
typedef boost::container::container_detail::
|
|
basic_multiallocation_chain<void*> multiallocation_chain_void;
|
|
typedef boost::container::container_detail::
|
|
transform_multiallocation_chain
|
|
<multiallocation_chain_void, T> multiallocation_chain;
|
|
#endif //#ifndef BOOST_CONTAINER_DOXYGEN_INVOKED
|
|
|
|
//!Obtains adaptive_pool from
|
|
//!adaptive_pool
|
|
template<class T2>
|
|
struct rebind
|
|
{
|
|
typedef adaptive_pool
|
|
< T2
|
|
, NodesPerBlock
|
|
, MaxFreeBlocks
|
|
, OverheadPercent
|
|
BOOST_CONTAINER_DOCIGN(BOOST_MOVE_I Version)
|
|
> other;
|
|
};
|
|
|
|
#ifndef BOOST_CONTAINER_DOXYGEN_INVOKED
|
|
private:
|
|
//!Not assignable from related adaptive_pool
|
|
template<class T2, unsigned Version2, std::size_t N2, std::size_t F2>
|
|
adaptive_pool& operator=
|
|
(const adaptive_pool<T2, Version2, N2, F2>&);
|
|
|
|
#endif //#ifndef BOOST_CONTAINER_DOXYGEN_INVOKED
|
|
|
|
public:
|
|
//!Default constructor
|
|
adaptive_pool() BOOST_NOEXCEPT_OR_NOTHROW
|
|
{}
|
|
|
|
//!Copy constructor from other adaptive_pool.
|
|
adaptive_pool(const adaptive_pool &) BOOST_NOEXCEPT_OR_NOTHROW
|
|
{}
|
|
|
|
//!Copy constructor from related adaptive_pool.
|
|
template<class T2>
|
|
adaptive_pool
|
|
(const adaptive_pool<T2, NodesPerBlock, MaxFreeBlocks, OverheadPercent
|
|
BOOST_CONTAINER_DOCIGN(BOOST_MOVE_I Version)> &) BOOST_NOEXCEPT_OR_NOTHROW
|
|
{}
|
|
|
|
//!Destructor
|
|
~adaptive_pool() BOOST_NOEXCEPT_OR_NOTHROW
|
|
{}
|
|
|
|
//!Returns the number of elements that could be allocated.
|
|
//!Never throws
|
|
size_type max_size() const BOOST_NOEXCEPT_OR_NOTHROW
|
|
{ return size_type(-1)/sizeof(T); }
|
|
|
|
//!Allocate memory for an array of count elements.
|
|
//!Throws std::bad_alloc if there is no enough memory
|
|
pointer allocate(size_type count, const void * = 0)
|
|
{
|
|
if(BOOST_UNLIKELY(count > this->max_size()))
|
|
boost::container::throw_bad_alloc();
|
|
|
|
if(Version == 1 && count == 1){
|
|
typedef typename container_detail::shared_adaptive_node_pool
|
|
<sizeof(T), NodesPerBlock, MaxFreeBlocks, OverheadPercent> shared_pool_t;
|
|
typedef container_detail::singleton_default<shared_pool_t> singleton_t;
|
|
return pointer(static_cast<T*>(singleton_t::instance().allocate_node()));
|
|
}
|
|
else{
|
|
return static_cast<pointer>(dlmalloc_malloc(count*sizeof(T)));
|
|
}
|
|
}
|
|
|
|
//!Deallocate allocated memory.
|
|
//!Never throws
|
|
void deallocate(const pointer &ptr, size_type count) BOOST_NOEXCEPT_OR_NOTHROW
|
|
{
|
|
(void)count;
|
|
if(Version == 1 && count == 1){
|
|
typedef container_detail::shared_adaptive_node_pool
|
|
<sizeof(T), NodesPerBlock, MaxFreeBlocks, OverheadPercent> shared_pool_t;
|
|
typedef container_detail::singleton_default<shared_pool_t> singleton_t;
|
|
singleton_t::instance().deallocate_node(ptr);
|
|
}
|
|
else{
|
|
dlmalloc_free(ptr);
|
|
}
|
|
}
|
|
|
|
pointer allocation_command(allocation_type command,
|
|
size_type limit_size,
|
|
size_type &prefer_in_recvd_out_size,
|
|
pointer &reuse)
|
|
{
|
|
pointer ret = this->priv_allocation_command(command, limit_size, prefer_in_recvd_out_size, reuse);
|
|
if(BOOST_UNLIKELY(!ret && !(command & BOOST_CONTAINER_NOTHROW_ALLOCATION)))
|
|
boost::container::throw_bad_alloc();
|
|
return ret;
|
|
}
|
|
|
|
//!Returns maximum the number of objects the previously allocated memory
|
|
//!pointed by p can hold.
|
|
size_type size(pointer p) const BOOST_NOEXCEPT_OR_NOTHROW
|
|
{ return dlmalloc_size(p); }
|
|
|
|
//!Allocates just one object. Memory allocated with this function
|
|
//!must be deallocated only with deallocate_one().
|
|
//!Throws bad_alloc if there is no enough memory
|
|
pointer allocate_one()
|
|
{
|
|
typedef container_detail::shared_adaptive_node_pool
|
|
<sizeof(T), NodesPerBlock, MaxFreeBlocks, OverheadPercent> shared_pool_t;
|
|
typedef container_detail::singleton_default<shared_pool_t> singleton_t;
|
|
return (pointer)singleton_t::instance().allocate_node();
|
|
}
|
|
|
|
//!Allocates many elements of size == 1.
|
|
//!Elements must be individually deallocated with deallocate_one()
|
|
void allocate_individual(std::size_t num_elements, multiallocation_chain &chain)
|
|
{
|
|
typedef container_detail::shared_adaptive_node_pool
|
|
<sizeof(T), NodesPerBlock, MaxFreeBlocks, OverheadPercent> shared_pool_t;
|
|
typedef container_detail::singleton_default<shared_pool_t> singleton_t;
|
|
singleton_t::instance().allocate_nodes(num_elements, static_cast<typename shared_pool_t::multiallocation_chain&>(chain));
|
|
//typename shared_pool_t::multiallocation_chain ch;
|
|
//singleton_t::instance().allocate_nodes(num_elements, ch);
|
|
//chain.incorporate_after
|
|
//(chain.before_begin(), (T*)&*ch.begin(), (T*)&*ch.last(), ch.size());
|
|
}
|
|
|
|
//!Deallocates memory previously allocated with allocate_one().
|
|
//!You should never use deallocate_one to deallocate memory allocated
|
|
//!with other functions different from allocate_one(). Never throws
|
|
void deallocate_one(pointer p) BOOST_NOEXCEPT_OR_NOTHROW
|
|
{
|
|
typedef container_detail::shared_adaptive_node_pool
|
|
<sizeof(T), NodesPerBlock, MaxFreeBlocks, OverheadPercent> shared_pool_t;
|
|
typedef container_detail::singleton_default<shared_pool_t> singleton_t;
|
|
singleton_t::instance().deallocate_node(p);
|
|
}
|
|
|
|
void deallocate_individual(multiallocation_chain &chain) BOOST_NOEXCEPT_OR_NOTHROW
|
|
{
|
|
typedef container_detail::shared_adaptive_node_pool
|
|
<sizeof(T), NodesPerBlock, MaxFreeBlocks, OverheadPercent> shared_pool_t;
|
|
typedef container_detail::singleton_default<shared_pool_t> singleton_t;
|
|
//typename shared_pool_t::multiallocation_chain ch(&*chain.begin(), &*chain.last(), chain.size());
|
|
//singleton_t::instance().deallocate_nodes(ch);
|
|
singleton_t::instance().deallocate_nodes(chain);
|
|
}
|
|
|
|
//!Allocates many elements of size elem_size.
|
|
//!Elements must be individually deallocated with deallocate()
|
|
void allocate_many(size_type elem_size, std::size_t n_elements, multiallocation_chain &chain)
|
|
{
|
|
BOOST_STATIC_ASSERT(( Version > 1 ));/*
|
|
dlmalloc_memchain ch;
|
|
BOOST_CONTAINER_MEMCHAIN_INIT(&ch);
|
|
if(BOOST_UNLIKELY(!dlmalloc_multialloc_nodes(n_elements, elem_size*sizeof(T), DL_MULTIALLOC_DEFAULT_CONTIGUOUS, &ch))){
|
|
boost::container::throw_bad_alloc();
|
|
}
|
|
chain.incorporate_after(chain.before_begin()
|
|
,(T*)BOOST_CONTAINER_MEMCHAIN_FIRSTMEM(&ch)
|
|
,(T*)BOOST_CONTAINER_MEMCHAIN_LASTMEM(&ch)
|
|
,BOOST_CONTAINER_MEMCHAIN_SIZE(&ch) );*/
|
|
if(BOOST_UNLIKELY(!dlmalloc_multialloc_nodes
|
|
(n_elements, elem_size*sizeof(T), DL_MULTIALLOC_DEFAULT_CONTIGUOUS, reinterpret_cast<dlmalloc_memchain *>(&chain)))){
|
|
boost::container::throw_bad_alloc();
|
|
}
|
|
}
|
|
|
|
//!Allocates n_elements elements, each one of size elem_sizes[i]
|
|
//!Elements must be individually deallocated with deallocate()
|
|
void allocate_many(const size_type *elem_sizes, size_type n_elements, multiallocation_chain &chain)
|
|
{
|
|
BOOST_STATIC_ASSERT(( Version > 1 ));/*
|
|
dlmalloc_memchain ch;
|
|
BOOST_CONTAINER_MEMCHAIN_INIT(&ch);
|
|
if(BOOST_UNLIKELY(!dlmalloc_multialloc_arrays(n_elements, elem_sizes, sizeof(T), DL_MULTIALLOC_DEFAULT_CONTIGUOUS, &ch))){
|
|
boost::container::throw_bad_alloc();
|
|
}
|
|
chain.incorporate_after(chain.before_begin()
|
|
,(T*)BOOST_CONTAINER_MEMCHAIN_FIRSTMEM(&ch)
|
|
,(T*)BOOST_CONTAINER_MEMCHAIN_LASTMEM(&ch)
|
|
,BOOST_CONTAINER_MEMCHAIN_SIZE(&ch) );*/
|
|
if(BOOST_UNLIKELY(!dlmalloc_multialloc_arrays
|
|
(n_elements, elem_sizes, sizeof(T), DL_MULTIALLOC_DEFAULT_CONTIGUOUS, reinterpret_cast<dlmalloc_memchain *>(&chain)))){
|
|
boost::container::throw_bad_alloc();
|
|
}
|
|
}
|
|
|
|
void deallocate_many(multiallocation_chain &chain) BOOST_NOEXCEPT_OR_NOTHROW
|
|
{/*
|
|
dlmalloc_memchain ch;
|
|
void *beg(&*chain.begin()), *last(&*chain.last());
|
|
size_t size(chain.size());
|
|
BOOST_CONTAINER_MEMCHAIN_INIT_FROM(&ch, beg, last, size);
|
|
dlmalloc_multidealloc(&ch);*/
|
|
dlmalloc_multidealloc(reinterpret_cast<dlmalloc_memchain *>(&chain));
|
|
}
|
|
|
|
//!Deallocates all free blocks of the pool
|
|
static void deallocate_free_blocks() BOOST_NOEXCEPT_OR_NOTHROW
|
|
{
|
|
typedef container_detail::shared_adaptive_node_pool
|
|
<sizeof(T), NodesPerBlock, MaxFreeBlocks, OverheadPercent> shared_pool_t;
|
|
typedef container_detail::singleton_default<shared_pool_t> singleton_t;
|
|
singleton_t::instance().deallocate_free_blocks();
|
|
}
|
|
|
|
//!Swaps allocators. Does not throw. If each allocator is placed in a
|
|
//!different memory segment, the result is undefined.
|
|
friend void swap(adaptive_pool &, adaptive_pool &) BOOST_NOEXCEPT_OR_NOTHROW
|
|
{}
|
|
|
|
//!An allocator always compares to true, as memory allocated with one
|
|
//!instance can be deallocated by another instance
|
|
friend bool operator==(const adaptive_pool &, const adaptive_pool &) BOOST_NOEXCEPT_OR_NOTHROW
|
|
{ return true; }
|
|
|
|
//!An allocator always compares to false, as memory allocated with one
|
|
//!instance can be deallocated by another instance
|
|
friend bool operator!=(const adaptive_pool &, const adaptive_pool &) BOOST_NOEXCEPT_OR_NOTHROW
|
|
{ return false; }
|
|
|
|
private:
|
|
pointer priv_allocation_command
|
|
(allocation_type command, std::size_t limit_size
|
|
,size_type &prefer_in_recvd_out_size, pointer &reuse_ptr)
|
|
{
|
|
std::size_t const preferred_size = prefer_in_recvd_out_size;
|
|
dlmalloc_command_ret_t ret = {0 , 0};
|
|
if(BOOST_UNLIKELY(limit_size > this->max_size() || preferred_size > this->max_size())){
|
|
return pointer();
|
|
}
|
|
std::size_t l_size = limit_size*sizeof(T);
|
|
std::size_t p_size = preferred_size*sizeof(T);
|
|
std::size_t r_size;
|
|
{
|
|
void* reuse_ptr_void = reuse_ptr;
|
|
ret = dlmalloc_allocation_command(command, sizeof(T), l_size, p_size, &r_size, reuse_ptr_void);
|
|
reuse_ptr = ret.second ? static_cast<T*>(reuse_ptr_void) : 0;
|
|
}
|
|
prefer_in_recvd_out_size = r_size/sizeof(T);
|
|
return (pointer)ret.first;
|
|
}
|
|
};
|
|
|
|
} //namespace container {
|
|
} //namespace boost {
|
|
|
|
#include <boost/container/detail/config_end.hpp>
|
|
|
|
#endif //#ifndef BOOST_CONTAINER_ADAPTIVE_POOL_HPP
|