Bug in linux version of function boost::interprocess::set_file_pointer

[im.valdik@…]

inline bool set_file_pointer(file_handle_t hnd, offset_t off, file_pos_t pos)
{  return off == ::lseek(hnd, off, (int)pos); }

Comparision "off == ::lseek(...)" is correct only if user is setting pointer from the begining of the file 'file_begin'. But if user is setting file pointer to zero from 'file_end' (setting file pointer to the end of file) set_file_pointer function will return false, even if lseek didn't failed.

I think its better to change code to something like this

inline bool set_file_pointer(file_handle_t hnd, offset_t off, file_pos_t pos)
{  return -1 != ::lseek(hnd, off, (int)pos); }

[Ion Gaztañaga]

Fixed for Boost 1.45 in release branch