devpoll.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* 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) 1998 by Sun Microsystems, Inc.
* All rights reserved.
*/
#ifndef _SYS_DEVPOLL_H
#define _SYS_DEVPOLL_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/poll_impl.h>
#include <sys/types32.h>
#ifdef __cplusplus
extern "C" {
#endif
/* /dev/poll ioctl */
#define DPIOC (0xD0 << 8)
#define DP_POLL (DPIOC | 1) /* poll on fds in cached in /dev/poll */
#define DP_ISPOLLED (DPIOC | 2) /* is this fd cached in /dev/poll */
#define DEVPOLLSIZE 1000 /* /dev/poll table size increment */
/*
* /dev/poll DP_POLL ioctl format
*/
typedef struct dvpoll {
pollfd_t *dp_fds; /* pollfd array */
nfds_t dp_nfds; /* num of pollfd's in dp_fds[] */
int dp_timeout; /* time out in milisec */
} dvpoll_t;
typedef struct dvpoll32 {
caddr32_t dp_fds; /* pollfd array */
uint32_t dp_nfds; /* num of pollfd's in dp_fds[] */
int32_t dp_timeout; /* time out in milisec */
} dvpoll32_t;
#ifdef _KERNEL
typedef struct dp_entry {
kmutex_t dpe_lock; /* protect a devpoll entry */
pollcache_t *dpe_pcache; /* a ptr to pollcache */
int dpe_refcnt; /* no. of ioctl lwp on the dpe */
int dpe_writerwait; /* no. of waits on write */
int dpe_flag; /* see below */
kcondvar_t dpe_cv;
} dp_entry_t;
#define DP_WRITER_PRESENT 0x1 /* a write is in progress */
#define DP_REFRELE(dpep) { \
mutex_enter(&(dpep)->dpe_lock); \
ASSERT((dpep)->dpe_refcnt > 0); \
(dpep)->dpe_refcnt--; \
if ((dpep)->dpe_refcnt == 0) { \
cv_broadcast(&(dpep)->dpe_cv); \
} \
mutex_exit(&(dpep)->dpe_lock); \
}
#endif /* _KERNEL */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_DEVPOLL_H */