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)