id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
6054,Reading Shared Memory from x86 to x64 and vice versa on OSX,tibdewal.rahulkumar@…,Ion Gaztañaga,"
If I create a SM from 64 bit application and open it on 32 bit application it fails.

//for 64 bit
    shared_memory_object( create_only, ""test"" , read_write) ; 
// for 32 bit
    shared_memory_object (open_only, ""test"", read_write);
file created by 64bit application is at path as below:

/private/tmp/boost_interprocess/AD21A54E000000000000000000000000/test
where as file searched by 32 bit application is at path

/private/tmp/boost_interprocess/AD21A54E00000000/test
Thus 32 bit applications cannot read the file.

I am using boost 1.47.0 on Mac OS X. Is it a bug? Do I have to do some settings use some Macros in order to fix it? Has any one encountered this problem before?




This Bug is present in tmp_dir_helpers.hpp file.

 
{{{
       inline void get_bootstamp(std::string &s, bool add = false)
        {
          ...
           std::size_t char_counter = 0;
           long  fields[2] = { result.tv_sec, result.tv_usec };
           for(std::size_t field = 0; field != 2; ++field){
              for(std::size_t i = 0; i != sizeof(long); ++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)];
              }
           ...
        }
}}}


Where as it should have been some thing like this..

 
{{{
   '''long long''' fields[2] = { result.tv_sec, result.tv_usec };
               for(std::size_t field = 0; field != 2; ++field){
                  for(std::size_t i = 0; i != sizeof('''long long'''); ++i)

}}}
",Bugs,closed,To Be Determined,interprocess,Boost 1.47.0,Showstopper,fixed,,