NAME

       io_wantwrite - signal that you want to write to a descriptor

SYNTAX

       #include <io.h>

       void io_wantwrite(int64 fd);

DESCRIPTION

       io_wantwrite  tells  the  next  io_wait() that you want to write to this descriptor.  Call
       io_dontwantwrite() again if you change your mind.

       The next time you call io_wait(), it will look whether this descriptor becomes  writeable,
       too.  You can then use io_canwrite() to check whether the descriptor has become writable.

       You  have  to have called io_fd on the descriptor first (io_pipe and io_socketpair do this
       for you).  Waiting on descriptors only works for sockets, fifos and pipes.   It  may  also
       work on devices and TTYs, but that is platform dependent -- you should not rely on that.

SEE ALSO

       io_wait(3), io_canwrite(3), io_wantwrite(3), io_fd(3)

                                                                                  io_wantwrite(3)