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//////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Ion Gaztanaga 2007-2014. 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_DETAIL_SHARED_DIR_HELPERS_HPP
#define BOOST_INTERPROCESS_DETAIL_SHARED_DIR_HELPERS_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/interprocess/detail/os_file_functions.hpp>
#include <boost/interprocess/errors.hpp>
#include <boost/interprocess/exceptions.hpp>
#include <string>
#if defined(BOOST_INTERPROCESS_HAS_KERNEL_BOOTTIME) && defined(BOOST_INTERPROCESS_WINDOWS)
#include <boost/interprocess/detail/windows_intermodule_singleton.hpp>
#endif
namespace boost {
namespace interprocess {
namespace ipcdetail {
#if defined(BOOST_INTERPROCESS_HAS_KERNEL_BOOTTIME)
#if defined(BOOST_INTERPROCESS_WINDOWS)
//This type will initialize the stamp
struct windows_bootstamp
{
windows_bootstamp()
{
//Throw if bootstamp not available
if(!winapi::get_last_bootup_time(stamp)){
error_info err = system_error_code();
throw interprocess_exception(err);
}
}
//Use std::string. Even if this will be constructed in shared memory, all
//modules/dlls are from this process so internal raw pointers to heap are always valid
std::string stamp;
};
inline void get_bootstamp(std::string &s, bool add = false)
{
const windows_bootstamp &bootstamp = windows_intermodule_singleton<windows_bootstamp>::get();
if(add){
s += bootstamp.stamp;
}
else{
s = bootstamp.stamp;
}
}
#elif defined(BOOST_INTERPROCESS_HAS_BSD_KERNEL_BOOTTIME)
inline void get_bootstamp(std::string &s, bool add = false)
{
// FreeBSD specific: sysctl "kern.boottime"
int request[2] = { CTL_KERN, KERN_BOOTTIME };
struct ::timeval result;
std::size_t result_len = sizeof result;
if (::sysctl (request, 2, &result, &result_len, 0, 0) < 0)
return;
char bootstamp_str[256];
const char Characters [] =
{ '0', '1', '2', '3', '4', '5', '6', '7'
, '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
std::size_t char_counter = 0;
//32 bit values to allow 32 and 64 bit process IPC
boost::uint32_t fields[2] = { boost::uint32_t(result.tv_sec), boost::uint32_t(result.tv_usec) };
for(std::size_t field = 0; field != 2; ++field){
for(std::size_t i = 0; i != sizeof(fields[0]); ++i){
const char *ptr = (const char *)&fields[field];
bootstamp_str[char_counter++] = Characters[(ptr[i]&0xF0)>>4];
bootstamp_str[char_counter++] = Characters[(ptr[i]&0x0F)];
}
}
bootstamp_str[char_counter] = 0;
if(add){
s += bootstamp_str;
}
else{
s = bootstamp_str;
}
}
#else
#error "BOOST_INTERPROCESS_HAS_KERNEL_BOOTTIME defined with no known implementation"
#endif
#endif //#if defined(BOOST_INTERPROCESS_HAS_KERNEL_BOOTTIME)
inline void get_shared_dir_root(std::string &dir_path)
{
#if defined (BOOST_INTERPROCESS_WINDOWS)
winapi::get_shared_documents_folder(dir_path);
#else
dir_path = "/tmp";
#endif
//We always need this path, so throw on error
if(dir_path.empty()){
error_info err = system_error_code();
throw interprocess_exception(err);
}
//Remove final null.
dir_path += "/boost_interprocess";
}
#if defined(BOOST_INTERPROCESS_SHARED_DIR_FUNC) && defined(BOOST_INTERPROCESS_SHARED_DIR_PATH)
#error "Error: Both BOOST_INTERPROCESS_SHARED_DIR_FUNC and BOOST_INTERPROCESS_SHARED_DIR_PATH defined!"
#endif
#ifdef BOOST_INTERPROCESS_SHARED_DIR_FUNC
namespace boost {
namespace interprocess {
namespace ipcdetail {
// When BOOST_INTERPROCESS_SHARED_DIR_FUNC is defined, users have to implement
// get_shared_dir
void get_shared_dir(std::string &shared_dir);
}
}
}
#else
inline void get_shared_dir(std::string &shared_dir)
{
#if defined(BOOST_INTERPROCESS_SHARED_DIR_PATH)
shared_dir = BOOST_INTERPROCESS_SHARED_DIR_PATH;
#else
get_shared_dir_root(shared_dir);
#if defined(BOOST_INTERPROCESS_HAS_KERNEL_BOOTTIME)
shared_dir += "/";
get_bootstamp(shared_dir, true);
#endif
#endif
}
#endif
inline void shared_filepath(const char *filename, std::string &filepath)
{
get_shared_dir(filepath);
filepath += "/";
filepath += filename;
}
inline void create_shared_dir_and_clean_old(std::string &shared_dir)
{
#if defined(BOOST_INTERPROCESS_SHARED_DIR_PATH) || defined(BOOST_INTERPROCESS_SHARED_DIR_FUNC)
get_shared_dir(shared_dir);
#else
//First get the temp directory
std::string root_shared_dir;
get_shared_dir_root(root_shared_dir);
//If fails, check that it's because already exists
if(!create_directory(root_shared_dir.c_str())){
error_info info(system_error_code());
if(info.get_error_code() != already_exists_error){
throw interprocess_exception(info);
}
}
#if defined(BOOST_INTERPROCESS_HAS_KERNEL_BOOTTIME)
get_shared_dir(shared_dir);
//If fails, check that it's because already exists
if(!create_directory(shared_dir.c_str())){
error_info info(system_error_code());
if(info.get_error_code() != already_exists_error){
throw interprocess_exception(info);
}
}
//Now erase all old directories created in the previous boot sessions
std::string subdir = shared_dir;
subdir.erase(0, root_shared_dir.size()+1);
delete_subdirectories(root_shared_dir, subdir.c_str());
#else
shared_dir = root_shared_dir;
#endif
#endif
}
inline void create_shared_dir_cleaning_old_and_get_filepath(const char *filename, std::string &shared_dir)
{
create_shared_dir_and_clean_old(shared_dir);
shared_dir += "/";
shared_dir += filename;
}
inline void add_leading_slash(const char *name, std::string &new_name)
{
if(name[0] != '/'){
new_name = '/';
}
new_name += name;
}
} //namespace boost{
} //namespace interprocess {
} //namespace ipcdetail {
#include <boost/interprocess/detail/config_end.hpp>
#endif //ifndef BOOST_INTERPROCESS_DETAIL_SHARED_DIR_HELPERS_HPP
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