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//////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Ion Gaztanaga 2008-2012. 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/interprocess for documentation.
//
//////////////////////////////////////////////////////////////////////////////
#ifndef BOOST_INTERPROCESS_MANAGED_XSI_SHARED_MEMORY_HPP
#define BOOST_INTERPROCESS_MANAGED_XSI_SHARED_MEMORY_HPP
#ifndef BOOST_CONFIG_HPP
# include <boost/config.hpp>
#endif
#
#if defined(BOOST_HAS_PRAGMA_ONCE)
# pragma once
#endif
#include <boost/interprocess/detail/config_begin.hpp>
#include <boost/interprocess/detail/workaround.hpp>
#if !defined(BOOST_INTERPROCESS_XSI_SHARED_MEMORY_OBJECTS)
#error "This header can't be used in operating systems without XSI (System V) shared memory support"
#endif
#include <boost/interprocess/detail/managed_memory_impl.hpp>
#include <boost/interprocess/detail/managed_open_or_create_impl.hpp>
#include <boost/interprocess/detail/xsi_shared_memory_file_wrapper.hpp>
#include <boost/interprocess/creation_tags.hpp>
//These includes needed to fulfill default template parameters of
//predeclarations in interprocess_fwd.hpp
#include <boost/interprocess/mem_algo/rbtree_best_fit.hpp>
#include <boost/interprocess/sync/mutex_family.hpp>
#include <boost/interprocess/indexes/iset_index.hpp>
namespace boost {
namespace interprocess {
namespace ipcdetail {
template<class AllocationAlgorithm>
struct xsishmem_open_or_create
{
typedef ipcdetail::managed_open_or_create_impl //!FileBased, StoreDevice
< xsi_shared_memory_file_wrapper, AllocationAlgorithm::Alignment, false, true> type;
};
} //namespace ipcdetail {
//!A basic X/Open System Interface (XSI) shared memory named object creation class. Initializes the
//!shared memory segment. Inherits all basic functionality from
//!basic_managed_memory_impl<CharType, AllocationAlgorithm, IndexType>
template
<
class CharType,
class AllocationAlgorithm,
template<class IndexConfig> class IndexType
>
class basic_managed_xsi_shared_memory
: public ipcdetail::basic_managed_memory_impl
<CharType, AllocationAlgorithm, IndexType
,ipcdetail::xsishmem_open_or_create<AllocationAlgorithm>::type::ManagedOpenOrCreateUserOffset>
, private ipcdetail::xsishmem_open_or_create<AllocationAlgorithm>::type
{
#if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
public:
typedef xsi_shared_memory_file_wrapper device_type;
public:
typedef typename ipcdetail::xsishmem_open_or_create<AllocationAlgorithm>::type base2_t;
typedef ipcdetail::basic_managed_memory_impl
<CharType, AllocationAlgorithm, IndexType,
base2_t::ManagedOpenOrCreateUserOffset> base_t;
typedef ipcdetail::create_open_func<base_t> create_open_func_t;
basic_managed_xsi_shared_memory *get_this_pointer()
{ return this; }
private:
typedef typename base_t::char_ptr_holder_t char_ptr_holder_t;
BOOST_MOVABLE_BUT_NOT_COPYABLE(basic_managed_xsi_shared_memory)
#endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED
public: //functions
typedef typename base_t::size_type size_type;
//!Destroys *this and indicates that the calling process is finished using
//!the resource. The destructor function will deallocate
//!any system resources allocated by the system for use by this process for
//!this resource. The resource can still be opened again calling
//!the open constructor overload. To erase the resource from the system
//!use remove().
~basic_managed_xsi_shared_memory()
{}
//!Default constructor. Does nothing.
//!Useful in combination with move semantics
basic_managed_xsi_shared_memory()
{}
//!Creates shared memory and creates and places the segment manager.
//!This can throw.
basic_managed_xsi_shared_memory(create_only_t, const xsi_key &key,
std::size_t size, const void *addr = 0, const permissions& perm = permissions())
: base_t()
, base2_t(create_only, key, size, read_write, addr,
create_open_func_t(get_this_pointer(), ipcdetail::DoCreate), perm)
{}
//!Creates shared memory and creates and places the segment manager if
//!segment was not created. If segment was created it connects to the
//!segment.
//!This can throw.
basic_managed_xsi_shared_memory (open_or_create_t,
const xsi_key &key, std::size_t size,
const void *addr = 0, const permissions& perm = permissions())
: base_t()
, base2_t(open_or_create, key, size, read_write, addr,
create_open_func_t(get_this_pointer(),
ipcdetail::DoOpenOrCreate), perm)
{}
//!Connects to a created shared memory and its segment manager.
//!in read-only mode.
//!This can throw.
basic_managed_xsi_shared_memory (open_read_only_t, const xsi_key &key,
const void *addr = 0)
: base_t()
, base2_t(open_only, key, read_only, addr,
create_open_func_t(get_this_pointer(),
ipcdetail::DoOpen))
{}
//!Connects to a created shared memory and its segment manager.
//!This can throw.
basic_managed_xsi_shared_memory (open_only_t, const xsi_key &key,
const void *addr = 0)
: base_t()
, base2_t(open_only, key, read_write, addr,
create_open_func_t(get_this_pointer(),
ipcdetail::DoOpen))
{}
//!Moves the ownership of "moved"'s managed memory to *this.
//!Does not throw
basic_managed_xsi_shared_memory(BOOST_RV_REF(basic_managed_xsi_shared_memory) moved)
{
basic_managed_xsi_shared_memory tmp;
this->swap(moved);
tmp.swap(moved);
}
//!Moves the ownership of "moved"'s managed memory to *this.
//!Does not throw
basic_managed_xsi_shared_memory &operator=(BOOST_RV_REF(basic_managed_xsi_shared_memory) moved)
{
basic_managed_xsi_shared_memory tmp(boost::move(moved));
this->swap(tmp);
return *this;
}
//!Swaps the ownership of the managed shared memories managed by *this and other.
//!Never throws.
void swap(basic_managed_xsi_shared_memory &other)
{
base_t::swap(other);
base2_t::swap(other);
}
//!Erases a XSI shared memory object identified by shmid
//!from the system.
//!Returns false on error. Never throws
static bool remove(int shmid)
{ return device_type::remove(shmid); }
int get_shmid() const
{ return base2_t::get_device().get_shmid(); }
#if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
//!Tries to find a previous named allocation address. Returns a memory
//!buffer and the object count. If not found returned pointer is 0.
//!Never throws.
template <class T>
std::pair<T*, std::size_t> find (char_ptr_holder_t name)
{
if(base2_t::get_mapped_region().get_mode() == read_only){
return base_t::template find_no_lock<T>(name);
}
else{
return base_t::template find<T>(name);
}
}
#endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED
};
#ifdef BOOST_INTERPROCESS_DOXYGEN_INVOKED
//!Typedef for a default basic_managed_xsi_shared_memory
//!of narrow characters
typedef basic_managed_xsi_shared_memory
<char
,rbtree_best_fit<mutex_family>
,iset_index>
managed_xsi_shared_memory;
//!Typedef for a default basic_managed_xsi_shared_memory
//!of wide characters
typedef basic_managed_xsi_shared_memory
<wchar_t
,rbtree_best_fit<mutex_family>
,iset_index>
wmanaged_xsi_shared_memory;
#endif //#ifdef BOOST_INTERPROCESS_DOXYGEN_INVOKED
} //namespace interprocess {
} //namespace boost {
#include <boost/interprocess/detail/config_end.hpp>
#endif //BOOST_INTERPROCESS_MANAGED_XSI_SHARED_MEMORY_HPP
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