poll.h File Reference

Poll, select wrappers. More...

#include <stddef.h>
#include <yaz/yconfig.h>

Go to the source code of this file.

Data Structures
struct	yaz_poll_fd
	select/poll fd info More...

Macros
#define	yaz_poll_add(var, value)   var = (enum yaz_poll_mask ) ((int) var | value)

Enumerations
enum	yaz_poll_mask {   yaz_poll_none = 0 , yaz_poll_read = 1 , yaz_poll_write = 2 , yaz_poll_except = 4 ,   yaz_poll_timeout = 8 }
	select/poll masks .. timeout is "output" only More...

Functions
int	yaz_poll (struct yaz_poll_fd *fds, int num_fds, int sec, int nsec)
	poll wrapper for poll or select

Detailed Description

Poll, select wrappers.

Definition in file poll.h.

Macro Definition Documentation

yaz_poll_add

#define yaz_poll_add	(		var,
			value
	)		var = (enum yaz_poll_mask ) ((int) var | value)

Definition at line 76 of file poll.h.

Enumeration Type Documentation

yaz_poll_mask

enum yaz_poll_mask

select/poll masks .. timeout is "output" only

Enumerator
yaz_poll_none
yaz_poll_read
yaz_poll_write
yaz_poll_except
yaz_poll_timeout

Definition at line 41 of file poll.h.

Function Documentation

yaz_poll()

int yaz_poll	(	struct yaz_poll_fd *	fds,
		int	num_fds,
		int	sec,
		int	nsec
	)

poll wrapper for poll or select

Parameters

fds	array of sockets to be polled
num_fds	size of fds array (number of sockets)
sec	number of seconds to wait (-1 for no timeout)
nsec	nano seconds to wait

Return values

-1	error
0	timeout
>0	event occur on one or more sockets

This functions calls yaz_poll_poll on systems where poll is available and yaz_poll_select where it it unavailable.

Definition at line 161 of file poll.c.

References yaz_poll_select().

Referenced by iochan_event_loop(), iochan_is_alive(), yaz_url_exec(), and ZOOM_event_sys_yaz_poll().