stxxl save and read vector from disk file

0
votes

I'm struggling in trying to use the stxxl library in a way, that I cannot only store the data from their vector structure into a file but also recover it from that file in a rerun of my program.

I found out that you can construct a vector from a file ( http://stxxl.sourceforge.net/tags/master/classstxxl_1_1vector.html#a4d9029657cc11315cb77955fae70b877 ) but the class "file" only contains these functions ( http://stxxl.sourceforge.net/tags/master/classstxxl_1_1file.html ) with no way (that I can see) to actually access an existing file with some given path.

Does someone who worked with this library before have an idea how to do that?

Thanks in advance

1
c++stxxl

1 Answers

0
votes

stxxl::file is an interface base class. Depending on your operating system, you want one of the derived classes

  • stxxl::syscall_file for UNIX, Linux, and Mac OS X using POSIX read and write,
  • stxxl::wincall_file for Windows, or
  • stxxl::linuxaio_file for Linux using the SYS_io_* asynchronous I/O syscalls (see man 7 aio for details). This requires STXXL 1.4.1.

You can use the stxxl::create_file function to decide at runtime which backend to use. Set the io_impl parameter to "syscall", "wincall", or "linuxaio", respectively.