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Diffstat (limited to 'boost/interprocess/detail/xsi_shared_memory_device.hpp')
| -rw-r--r-- | boost/interprocess/detail/xsi_shared_memory_device.hpp | 401 |
1 files changed, 0 insertions, 401 deletions
diff --git a/boost/interprocess/detail/xsi_shared_memory_device.hpp b/boost/interprocess/detail/xsi_shared_memory_device.hpp deleted file mode 100644 index 2f256a5f6c..0000000000 --- a/boost/interprocess/detail/xsi_shared_memory_device.hpp +++ /dev/null @@ -1,401 +0,0 @@ -////////////////////////////////////////////////////////////////////////////// -// -// (C) Copyright Ion Gaztanaga 2009-2012. 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_XSI_SHARED_MEMORY_DEVICE_HPP -#define BOOST_INTERPROCESS_XSI_SHARED_MEMORY_DEVICE_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> -#include <boost/detail/workaround.hpp> - -#if defined(BOOST_INTERPROCESS_WINDOWS) -#error "This header can't be used in Windows operating systems" -#endif - -#include <boost/interprocess/creation_tags.hpp> -#include <boost/interprocess/exceptions.hpp> -#include <boost/interprocess/detail/utilities.hpp> -#include <boost/interprocess/detail/os_file_functions.hpp> -#include <boost/interprocess/detail/shared_dir_helpers.hpp> -#include <boost/interprocess/detail/simple_swap.hpp> -#include <boost/interprocess/interprocess_fwd.hpp> -#include <boost/interprocess/exceptions.hpp> - -#include <boost/interprocess/xsi_shared_memory.hpp> -#include <boost/interprocess/sync/xsi/xsi_named_mutex.hpp> -#include <boost/interprocess/mapped_region.hpp> -#include <boost/interprocess/sync/scoped_lock.hpp> -#include <cstddef> -#include <boost/cstdint.hpp> -#include <string> -#include <cstring> - -//!\file -//!Describes a class representing a native xsi shared memory. - -namespace boost { -namespace interprocess { - -class xsi_shared_memory_device -{ - #if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED) - BOOST_MOVABLE_BUT_NOT_COPYABLE(xsi_shared_memory_file_wrapper) - #endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED - - public: - - xsi_shared_memory_device(); - - xsi_shared_memory_device(create_only_t, const char *name, mode_t mode, std::size_t size) - { this->priv_open_or_create_name_only(ipcdetail::DoCreate, name, mode, size); } - - xsi_shared_memory_device(open_or_create_t, const char *name, mode_t mode, std::size_t size) - { this->priv_open_or_create_name_only(ipcdetail::DoOpenOrCreate, name, mode, size); } - - xsi_shared_memory_device(open_only_t, const char *name, mode_t mode) - { this->priv_open_or_create_name_only(ipcdetail::DoOpen, name, mode, 0); } - - xsi_shared_memory_device(create_only_t, const char *filepath, boost::uint8_t id, mode_t mode, std::size_t size) - { this->priv_open_or_create_name_id(ipcdetail::DoCreate, name, id, mode, size); } - - xsi_shared_memory_device(open_or_create_t, const char *filepath, boost::uint8_t id, mode_t mode, std::size_t size) - { this->priv_open_or_create_name_id(ipcdetail::DoOpenOrCreate, id, name, mode, size); } - - xsi_shared_memory_device(open_only_t, const char *filepath, boost::uint8_t id, mode_t mode) - { this->priv_open_or_create_name_id(ipcdetail::DoOpen, name, id, mode, 0); } - - xsi_shared_memory_device(BOOST_RV_REF(xsi_shared_memory_device) moved) - { this->swap(moved); } - - xsi_shared_memory_device &operator=(BOOST_RV_REF(xsi_shared_memory_device) moved) - { - xsi_shared_memory_device tmp(boost::move(moved)); - this->swap(tmp); - return *this; - } - - //!Swaps two xsi_shared_memory_device. Does not throw - void swap(xsi_shared_memory_device &other); - - //!Destroys *this. The shared memory won't be destroyed, just - //!this connection to it. Use remove() to destroy the shared memory. - ~xsi_shared_memory_device(); - - //!Returns the name of the - //!shared memory. - const char *get_name() const; - - //!Returns the shared memory ID that - //!identifies the shared memory - int get_shmid() const; - - //!Returns access - //!permissions - mode_t get_mode() const; - - //!Returns the mapping handle. - //!Never throws - mapping_handle_t get_mapping_handle() const; - - //!Erases a XSI shared memory object identified by shmname - //!from the system. - //!Returns false on error. Never throws - static bool remove(const char *shmname); - - //!Erases the XSI shared memory object identified by shmid - //!from the system. - //!Returns false on error. Never throws - static bool remove(int shmid); - - #if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED) - private: - template<int Dummy> - struct info_constants_t - { - static const std::size_t MaxName = 32; - static const std::size_t FirstID = 2; - static const std::size_t LastID = 256; - static const std::size_t NumID = LastID - FirstID; - }; - - struct info_t - { - struct names_t - { - char buf[info_constants_t<0>::MaxName]; - } names[info_constants_t<0>::NumID]; - }; - - static void priv_obtain_index(mapped_region &m, xsi_named_mutex &m, std::string &path); - static bool priv_remove_dead_memory(info_t *info, const char *path); - - bool priv_open_or_create_name_only( ipcdetail::create_enum_t type - , const char *shmname - , mode_t mode - , std::size_t size); - bool priv_open_or_create_name_id( ipcdetail::create_enum_t type - , const char *shmname - , boost::uint8_t id - , mode_t mode - , std::size_t size); - xsi_shared_memory m_shm; - mode_t m_mode; - std::string m_name; - #endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED -}; - -template<int Dummy> -const std::size_t xsi_shared_memory_device::info_constants_t<Dummy>::MaxName; - -template<int Dummy> -const std::size_t xsi_shared_memory_device::info_constants_t<Dummy>::FirstID; - -template<int Dummy> -const std::size_t xsi_shared_memory_device::info_constants_t<Dummy>::LastID; - -template<int Dummy> -const std::size_t xsi_shared_memory_device::info_constants_t<Dummy>::NumID; - -#if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED) - -inline xsi_shared_memory_device::xsi_shared_memory_device() - : m_shm(), m_mode(invalid_mode), m_name() -{} - -inline xsi_shared_memory_device::~xsi_shared_memory_device() -{} - -inline const char *xsi_shared_memory_device::get_name() const -{ return m_name.c_str(); } - -inline void xsi_shared_memory_device::swap(xsi_shared_memory_device &other) -{ - m_shm.swap(other.m_shm); - (simple_swap)(m_mode, other.m_mode); - m_name.swap(other.m_name); -} - -inline mapping_handle_t xsi_shared_memory_device::get_mapping_handle() const -{ return m_shm.get_mapping_handle(); } - -inline mode_t xsi_shared_memory_device::get_mode() const -{ return m_mode; } - -inline int xsi_shared_memory::get_shmid() const -{ return m_shm.get_shmid(); } - -inline void xsi_shared_memory_device::priv_obtain_index - (mapped_region ®, xsi_named_mutex &mut, std::string &path) -{ - const char *const filename = "xsi_shm_emulation_file"; - permissions p; - p.set_unrestricted(); - std::string xsi_shm_emulation_file_path; - ipcdetail::create_shared_dir_cleaning_old_and_get_filepath(filename, xsi_shm_emulation_file_path); - ipcdetail::create_or_open_file(xsi_shm_emulation_file_path.c_str(), read_write, p); - const std::size_t MemSize = sizeof(info_t); - - xsi_shared_memory index_shm(open_or_create, xsi_shm_emulation_file_path.c_str(), 1, MemSize, 0666); - mapped_region r(index_shm, read_write, 0, MemSize, 0); - xsi_named_mutex m(open_or_create, xsi_shm_emulation_file_path.c_str(), 2, 0666); - reg = boost::move(r); - mut = boost::move(m); - path.swap(xsi_shm_emulation_file_path); -} - -inline bool xsi_shared_memory_device::priv_remove_dead_memory - (xsi_shared_memory_device::info_t *info, const char *path) -{ - bool removed = false; - for(std::size_t i = 0; i != info_constants_t<0>::NumID; ++i){ - if(info->names[i].buf[0]){ - try{ - xsi_shared_memory temp( open_only, path, i+info_constants_t<0>::FirstID, 0600); - } - catch(interprocess_exception &e){ - if(e.get_error_code() == not_found_error){ - std::memset(info->names[i].buf, 0, info_constants_t<0>::MaxName); - removed = true; - } - } - } - } - return removed; -} - -inline bool xsi_shared_memory_device::priv_open_or_create_name_id - (ipcdetail::create_enum_t type, const char *filepath, mode_t mode, std::size_t size) -{ - //Set accesses - if (mode != read_write && mode != read_only){ - error_info err = other_error; - throw interprocess_exception(err); - } - - int perm = (mode == read_only) ? (0444) : (0666); - - if(type == ipcdetail::DoOpen){ - if(!found){ - error_info err = not_found_error; - throw interprocess_exception(err); - } - xsi_shared_memory temp(open_only, filepath, id, perm); - m_shm = boost::move(temp); - } - else if(type == ipcdetail::DoCreate){ - //Try to reuse slot - xsi_shared_memory temp(create_only, filepath, id, size, perm); - std::strcpy(info->names[target_entry].buf, shmname); - m_shm = boost::move(temp); - } - else{ // if(type == ipcdetail::DoOpenOrCreate){ - xsi_shared_memory temp(open_or_create, filepath, id, size, perm); - m_shm = boost::move(temp); - } - - m_mode = mode; - m_name.clear(); - return true; -} - -inline bool xsi_shared_memory_device::priv_open_or_create_name_only - (ipcdetail::create_enum_t type, const char *shmname, mode_t mode, std::size_t size) -{ - //Set accesses - if (mode != read_write && mode != read_only){ - error_info err = other_error; - throw interprocess_exception(err); - } - - if (std::strlen(shmname) >= (info_constants_t<0>::MaxName)){ - error_info err = other_error; - throw interprocess_exception(err); - } - - { - //Obtain index and index lock - mapped_region region; - xsi_named_mutex mut; - std::string xsi_shm_emulation_file_path; - priv_obtain_index(region, mut, xsi_shm_emulation_file_path); - info_t *info = static_cast<info_t *>(region.get_address()); - scoped_lock<xsi_named_mutex> lock(mut); - - //Find the correct entry or the first empty index - bool found = false; - int target_entry = -1; - int tries = 2; - while(tries--){ - for(std::size_t i = 0; i != info_constants_t<0>::NumID; ++i){ - if(target_entry < 0 && !info->names[i].buf[0]){ - target_entry = static_cast<int>(i); - } - else if(0 == std::strcmp(info->names[i].buf, shmname)){ - found = true; - target_entry = static_cast<int>(i); - break; - } - } - if(target_entry < 0){ - if(!tries || !priv_remove_dead_memory(info, xsi_shm_emulation_file_path.c_str())){ - error_info err = out_of_resource_error; - throw interprocess_exception(err); - } - } - } - //Now handle the result - int perm = (mode == read_only) ? (0444) : (0666); - if(type == ipcdetail::DoOpen){ - if(!found){ - error_info err = not_found_error; - throw interprocess_exception(err); - } - xsi_shared_memory temp( open_only, xsi_shm_emulation_file_path.c_str() - , target_entry+info_constants_t<0>::FirstID, perm); - m_shm = boost::move(temp); - } - else{ - - if(type == ipcdetail::DoCreate){ - //Try to reuse slot - xsi_shared_memory temp( create_only, xsi_shm_emulation_file_path.c_str() - , target_entry+info_constants_t<0>::FirstID, size, perm); - std::strcpy(info->names[target_entry].buf, shmname); - m_shm = boost::move(temp); - } - else{ // if(type == ipcdetail::DoOpenOrCreate){ - xsi_shared_memory temp( open_or_create, xsi_shm_emulation_file_path.c_str() - , target_entry+info_constants_t<0>::FirstID, size, perm); - if(!found){ - std::memset(info->names[target_entry].buf, 0, info_constants_t<0>::MaxName); - std::strcpy(info->names[target_entry].buf, shmname); - } - m_shm = boost::move(temp); - } - } - } - - m_mode = mode; - m_name = shmname; - return true; -} - -inline bool xsi_shared_memory_device::remove(const char *shmname) -{ - try{ - //Obtain index and index lockss - mapped_region region; - xsi_named_mutex mut; - std::string xsi_shm_emulation_file_path; - priv_obtain_index(region, mut, xsi_shm_emulation_file_path); - scoped_lock<xsi_named_mutex> lock(mut); - info_t *info = static_cast<info_t *>(region.get_address()); - - //Now check and remove - bool removed = false; - - for(std::size_t i = 0; i != info_constants_t<0>::NumID; ++i){ - if(0 == std::strcmp(info->names[i].buf, name)){ - xsi_shared_memory temp( open_only, xsi_shm_emulation_file_path.c_str() - , i+info_constants_t<0>::FirstID); - if(!xsi_shared_memory::remove(temp.get_shmid()) && (system_error_code() != invalid_argument)){ - return false; - } - std::memset(info->names[i].buf, 0, info_constants_t<0>::MaxName); - removed = true; - break; - } - } - return removed; - } - catch(...){ - return false; - } -} - -inline bool xsi_shared_memory_device::remove(int shmid) -{ return xsi_shared_memory::remove(shmid); } - -#endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED - -} //namespace interprocess { -} //namespace boost { - -#include <boost/interprocess/detail/config_end.hpp> - -#endif //BOOST_INTERPROCESS_XSI_SHARED_MEMORY_DEVICE_HPP |