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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Copyright 2014 Garrett D'Amore <garrett@damore.org>
*
* Copyright (c) 1995, 1998 by Sun Microsystems, Inc.
* All rights reserved.
*/
/*
* Copyright 2015, Joyent, Inc.
*/
#ifndef _SYS_POLL_H
#define _SYS_POLL_H
#ifdef __cplusplus
extern "C" {
#endif
/*
* Structure of file descriptor/event pairs supplied in
* the poll arrays.
*/
typedef struct pollfd {
int fd; /* file desc to poll */
short events; /* events of interest on fd */
short revents; /* events that occurred on fd */
} pollfd_t;
typedef unsigned long nfds_t;
/*
* Testable select events
*/
#define POLLIN 0x0001 /* fd is readable */
#define POLLPRI 0x0002 /* high priority info at fd */
#define POLLOUT 0x0004 /* fd is writeable (won't block) */
#define POLLRDNORM 0x0040 /* normal data is readable */
#define POLLWRNORM POLLOUT
#define POLLRDBAND 0x0080 /* out-of-band data is readable */
#define POLLWRBAND 0x0100 /* out-of-band data is writeable */
#define POLLRDHUP 0x4000 /* read-side hangup */
#define POLLNORM POLLRDNORM
/*
* Non-testable poll events (may not be specified in events field,
* but may be returned in revents field).
*/
#define POLLERR 0x0008 /* fd has error condition */
#define POLLHUP 0x0010 /* fd has been hung up on */
#define POLLNVAL 0x0020 /* invalid pollfd entry */
/*
* These events will never be specified in revents, but may be specified in
* events to control /dev/poll behavior.
*/
#define POLLREMOVE 0x0800 /* remove cached /dev/poll fd */
#define POLLONESHOT 0x1000 /* /dev/poll should one-shot this fd */
#define POLLET 0x2000 /* edge-triggered /dev/poll fd */
#ifdef _KERNEL
/*
* Additional private poll flags supported only by strpoll().
* Must be bit-wise distinct from the above POLL flags.
*/
#define POLLRDDATA 0x0200 /* Wait for M_DATA; ignore M_PROTO only msgs */
#define POLLNOERR 0x0400 /* Ignore POLLERR conditions */
#define POLLCLOSED 0x8000 /* a (cached) poll fd has been closed */
#endif /* _KERNEL */
#if defined(_KERNEL) || defined(_FAKE_KERNEL) || defined(_KMEMUSER)
#include <sys/thread.h>
/*
* XXX We are forced to use a forward reference here because including
* file.h here will break i386 build. The real solution is to fix the
* broken parts in usr/src/stand/lib/fs.
*/
struct fpollinfo;
/*
* Poll list head structure. A pointer to this is passed to
* pollwakeup() from the caller indicating an event has occurred.
* Only the ph_list field is used, but for DDI compliance, we can't
* change the size of the structure.
*/
typedef struct pollhead {
struct polldat *ph_list; /* list of pollers */
void *ph_pad1; /* unused -- see above */
short ph_pad2; /* unused -- see above */
} pollhead_t;
#if defined(_KERNEL)
/*
* Routine called to notify a process of the occurrence
* of an event.
*/
extern void pollwakeup(pollhead_t *, short);
/*
* Internal routines.
*/
extern int polllock(pollhead_t *, kmutex_t *);
extern int pollunlock(int *);
extern void pollrelock(int);
extern void pollcleanup(void);
extern void pollblockexit(struct fpollinfo *);
extern void pollcacheclean(struct fpollinfo *, int);
/*
* public poll head interface:
*
* pollhead_clean clean up all polldats on a pollhead list
*/
extern void pollhead_clean(pollhead_t *);
#endif /* defined(_KERNEL) */
#endif /* defined(_KERNEL) || defined(_KMEMUSER) */
#if !defined(_KERNEL)
int poll(struct pollfd *, nfds_t, int);
#endif /* !_KERNEL */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_POLL_H */
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