1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 1998 by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 #ifndef _SYS_DEVPOLL_H 28 #define _SYS_DEVPOLL_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include <sys/poll_impl.h> 33 #include <sys/types32.h> 34 35 #ifdef __cplusplus 36 extern "C" { 37 #endif 38 39 40 /* /dev/poll ioctl */ 41 #define DPIOC (0xD0 << 8) 42 #define DP_POLL (DPIOC | 1) /* poll on fds in cached in /dev/poll */ 43 #define DP_ISPOLLED (DPIOC | 2) /* is this fd cached in /dev/poll */ 44 45 #define DEVPOLLSIZE 1000 /* /dev/poll table size increment */ 46 47 /* 48 * /dev/poll DP_POLL ioctl format 49 */ 50 typedef struct dvpoll { 51 pollfd_t *dp_fds; /* pollfd array */ 52 nfds_t dp_nfds; /* num of pollfd's in dp_fds[] */ 53 int dp_timeout; /* time out in milisec */ 54 } dvpoll_t; 55 56 typedef struct dvpoll32 { 57 caddr32_t dp_fds; /* pollfd array */ 58 uint32_t dp_nfds; /* num of pollfd's in dp_fds[] */ 59 int32_t dp_timeout; /* time out in milisec */ 60 } dvpoll32_t; 61 62 #ifdef _KERNEL 63 64 typedef struct dp_entry { 65 kmutex_t dpe_lock; /* protect a devpoll entry */ 66 pollcache_t *dpe_pcache; /* a ptr to pollcache */ 67 int dpe_refcnt; /* no. of ioctl lwp on the dpe */ 68 int dpe_writerwait; /* no. of waits on write */ 69 int dpe_flag; /* see below */ 70 kcondvar_t dpe_cv; 71 } dp_entry_t; 72 73 #define DP_WRITER_PRESENT 0x1 /* a write is in progress */ 74 75 #define DP_REFRELE(dpep) { \ 76 mutex_enter(&(dpep)->dpe_lock); \ 77 ASSERT((dpep)->dpe_refcnt > 0); \ 78 (dpep)->dpe_refcnt--; \ 79 if ((dpep)->dpe_refcnt == 0) { \ 80 cv_broadcast(&(dpep)->dpe_cv); \ 81 } \ 82 mutex_exit(&(dpep)->dpe_lock); \ 83 } 84 #endif /* _KERNEL */ 85 86 #ifdef __cplusplus 87 } 88 #endif 89 90 #endif /* _SYS_DEVPOLL_H */ 91