| ////////////////////////////////////////////////////////////////////////////// |
| // |
| // (C) Copyright Ion Gaztanaga 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_XSI_KEY_HPP |
| #define BOOST_INTERPROCESS_XSI_KEY_HPP |
| |
| #include <boost/interprocess/detail/config_begin.hpp> |
| #include <boost/interprocess/detail/workaround.hpp> |
| #include <boost/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/creation_tags.hpp> |
| #include <boost/interprocess/exceptions.hpp> |
| #include <boost/interprocess/detail/utilities.hpp> |
| #include <boost/interprocess/detail/move.hpp> |
| #include <boost/interprocess/detail/os_file_functions.hpp> |
| #include <boost/interprocess/interprocess_fwd.hpp> |
| #include <boost/interprocess/exceptions.hpp> |
| #include <sys/types.h> |
| #include <sys/ipc.h> |
| #include <cstddef> |
| #include <boost/cstdint.hpp> |
| |
| //!\file |
| //!Describes a class representing a xsi key type. |
| |
| namespace boost { |
| namespace interprocess { |
| |
| //!A class that wraps XSI (System V) key_t type. |
| //!This type calculates key_t from path and id using ftok |
| //!or sets key to IPC_PRIVATE using the default constructor. |
| class xsi_key |
| { |
| public: |
| |
| //!Default constructor. |
| //!Represents a private xsi_key. |
| xsi_key() |
| : m_key(IPC_PRIVATE) |
| {} |
| |
| //!Creates a new XSI shared memory with a key obtained from a call to ftok (with path |
| //!"path" and id "id"), of size "size" and permissions "perm". |
| //!If the shared memory previously exists, throws an error. |
| xsi_key(const char *path, boost::uint8_t id) |
| { |
| key_t key; |
| if(path){ |
| key = ::ftok(path, id); |
| if(((key_t)-1) == key){ |
| error_info err = system_error_code(); |
| throw interprocess_exception(err); |
| } |
| } |
| else{ |
| key = IPC_PRIVATE; |
| } |
| m_key = key; |
| } |
| |
| //!Returns the internal key_t value |
| key_t get_key() const |
| { return m_key; } |
| |
| /// @cond |
| private: |
| key_t m_key; |
| /// @endcond |
| }; |
| |
| } //namespace interprocess { |
| } //namespace boost { |
| |
| #include <boost/interprocess/detail/config_end.hpp> |
| |
| #endif //BOOST_INTERPROCESS_XSI_KEY_HPP |