/Src/Dependencies/Boost/boost/interprocess/managed_mapped_file.hpp
http://hadesmem.googlecode.com/ · C++ Header · 206 lines · 119 code · 29 blank · 58 comment · 3 complexity · 05ee7ac4b106e2212ead8615ab517190 MD5 · raw file
- //////////////////////////////////////////////////////////////////////////////
- //
- // (C) Copyright Ion Gaztanaga 2005-2009. 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_MAPPED_FILE_HPP
- #define BOOST_INTERPROCESS_MANAGED_MAPPED_FILE_HPP
- #if (defined _MSC_VER) && (_MSC_VER >= 1200)
- # pragma once
- #endif
- #include <boost/interprocess/detail/config_begin.hpp>
- #include <boost/interprocess/detail/workaround.hpp>
- #include <boost/interprocess/detail/managed_open_or_create_impl.hpp>
- #include <boost/interprocess/detail/managed_memory_impl.hpp>
- #include <boost/interprocess/creation_tags.hpp>
- #include <boost/interprocess/detail/file_wrapper.hpp>
- #include <boost/interprocess/detail/move.hpp>
- #include <boost/interprocess/file_mapping.hpp>
- #include <boost/interprocess/permissions.hpp>
- namespace boost {
- namespace interprocess {
- //!A basic mapped file named object creation class. Initializes the
- //!mapped file. 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_mapped_file
- : public detail::basic_managed_memory_impl
- <CharType, AllocationAlgorithm, IndexType
- ,detail::managed_open_or_create_impl<detail::file_wrapper>::ManagedOpenOrCreateUserOffset>
- {
- /// @cond
- public:
- typedef detail::basic_managed_memory_impl
- <CharType, AllocationAlgorithm, IndexType,
- detail::managed_open_or_create_impl<detail::file_wrapper>::ManagedOpenOrCreateUserOffset> base_t;
- typedef detail::file_wrapper device_type;
- private:
- typedef detail::create_open_func<base_t> create_open_func_t;
- typedef detail::managed_open_or_create_impl<detail::file_wrapper> managed_open_or_create_type;
- basic_managed_mapped_file *get_this_pointer()
- { return this; }
- private:
- typedef typename base_t::char_ptr_holder_t char_ptr_holder_t;
- BOOST_INTERPROCESS_MOVABLE_BUT_NOT_COPYABLE(basic_managed_mapped_file)
- /// @endcond
- public: //functions
- //!Creates mapped file and creates and places the segment manager.
- //!This can throw.
- basic_managed_mapped_file()
- {}
- //!Creates mapped file and creates and places the segment manager.
- //!This can throw.
- basic_managed_mapped_file(create_only_t create_only, const char *name,
- std::size_t size, const void *addr = 0, const permissions &perm = permissions())
- : m_mfile(create_only, name, size, read_write, addr,
- create_open_func_t(get_this_pointer(), detail::DoCreate), perm)
- {}
- //!Creates mapped file 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_mapped_file (open_or_create_t open_or_create,
- const char *name, std::size_t size,
- const void *addr = 0, const permissions &perm = permissions())
- : m_mfile(open_or_create, name, size, read_write, addr,
- create_open_func_t(get_this_pointer(),
- detail::DoOpenOrCreate), perm)
- {}
- //!Connects to a created mapped file and its segment manager.
- //!This can throw.
- basic_managed_mapped_file (open_only_t open_only, const char* name,
- const void *addr = 0)
- : m_mfile(open_only, name, read_write, addr,
- create_open_func_t(get_this_pointer(),
- detail::DoOpen))
- {}
- //!Connects to a created mapped file and its segment manager
- //!in copy_on_write mode.
- //!This can throw.
- basic_managed_mapped_file (open_copy_on_write_t, const char* name,
- const void *addr = 0)
- : m_mfile(open_only, name, copy_on_write, addr,
- create_open_func_t(get_this_pointer(),
- detail::DoOpen))
- {}
- //!Connects to a created mapped file and its segment manager
- //!in read-only mode.
- //!This can throw.
- basic_managed_mapped_file (open_read_only_t, const char* name,
- const void *addr = 0)
- : m_mfile(open_only, name, read_only, addr,
- create_open_func_t(get_this_pointer(),
- detail::DoOpen))
- {}
- //!Moves the ownership of "moved"'s managed memory to *this.
- //!Does not throw
- basic_managed_mapped_file(BOOST_INTERPROCESS_RV_REF(basic_managed_mapped_file) moved)
- {
- this->swap(moved);
- }
- //!Moves the ownership of "moved"'s managed memory to *this.
- //!Does not throw
- basic_managed_mapped_file &operator=(BOOST_INTERPROCESS_RV_REF(basic_managed_mapped_file) moved)
- {
- basic_managed_mapped_file tmp(boost::interprocess::move(moved));
- this->swap(tmp);
- return *this;
- }
- //!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_mapped_file()
- {}
- //!Swaps the ownership of the managed mapped memories managed by *this and other.
- //!Never throws.
- void swap(basic_managed_mapped_file &other)
- {
- base_t::swap(other);
- m_mfile.swap(other.m_mfile);
- }
- //!Flushes cached data to file.
- //!Never throws
- bool flush()
- { return m_mfile.flush(); }
- //!Tries to resize mapped file so that we have room for
- //!more objects.
- //!
- //!This function is not synchronized so no other thread or process should
- //!be reading or writing the file
- static bool grow(const char *filename, std::size_t extra_bytes)
- {
- return base_t::template grow
- <basic_managed_mapped_file>(filename, extra_bytes);
- }
- //!Tries to resize mapped file to minimized the size of the file.
- //!
- //!This function is not synchronized so no other thread or process should
- //!be reading or writing the file
- static bool shrink_to_fit(const char *filename)
- {
- return base_t::template shrink_to_fit
- <basic_managed_mapped_file>(filename);
- }
- /// @cond
- //!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(m_mfile.get_mapped_region().get_mode() == read_only){
- return base_t::template find_no_lock<T>(name);
- }
- else{
- return base_t::template find<T>(name);
- }
- }
- private:
- managed_open_or_create_type m_mfile;
- /// @endcond
- };
- } //namespace interprocess {
- } //namespace boost {
- #include <boost/interprocess/detail/config_end.hpp>
- #endif //BOOST_INTERPROCESS_MANAGED_MAPPED_FILE_HPP