NAME¶

iom_add - add event to I/O multiplexer

SYNTAX¶

#include <libowfat/io.h>

int iom_add(iomux_t* c, int64 fd, unsigned int events);

DESCRIPTION¶

iom_add adds an event you are interested in to an I/O multiplexer.

fd is the file descriptor (usually a socket) you are interested in, and events is the operation you want to do. It can be IOM_READ or IOM_WRITE.

If that operation becomes possible on that descriptor, and some thread is calling iom_wait at the time, it will return and tell you the fd and the event.

Note that the event registration is removed from the iomux_t context if it occurs. You will have to call iom_wait again after you handled the event, if you are still interested in it.

Closing a file descriptor with registered events will discard the event registration.

LINKING¶

You may have to add -lpthread to the command line in the linking step.

RETURN VALUE¶

iom_add returns 0 on success and -1 on error, setting errno.

SEE ALSO¶

iom_init, iom_wait, iom_abort