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 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 23 /* All Rights Reserved */ 24 25 26 /* 27 * Copyright (c) 1995, 1998 by Sun Microsystems, Inc. 28 * All rights reserved. 29 */ 30 31 #ifndef _SYS_POLL_H 32 #define _SYS_POLL_H 33 34 #pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 11.9 */ 35 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 40 /* 41 * Structure of file descriptor/event pairs supplied in 42 * the poll arrays. 43 */ 44 typedef struct pollfd { 45 int fd; /* file desc to poll */ 46 short events; /* events of interest on fd */ 47 short revents; /* events that occurred on fd */ 48 } pollfd_t; 49 50 typedef unsigned long nfds_t; 51 52 /* 53 * Testable select events 54 */ 55 #define POLLIN 0x0001 /* fd is readable */ 56 #define POLLPRI 0x0002 /* high priority info at fd */ 57 #define POLLOUT 0x0004 /* fd is writeable (won't block) */ 58 #define POLLRDNORM 0x0040 /* normal data is readable */ 59 #define POLLWRNORM POLLOUT 60 #define POLLRDBAND 0x0080 /* out-of-band data is readable */ 61 #define POLLWRBAND 0x0100 /* out-of-band data is writeable */ 62 63 #define POLLNORM POLLRDNORM 64 65 /* 66 * Non-testable poll events (may not be specified in events field, 67 * but may be returned in revents field). 68 */ 69 #define POLLERR 0x0008 /* fd has error condition */ 70 #define POLLHUP 0x0010 /* fd has been hung up on */ 71 #define POLLNVAL 0x0020 /* invalid pollfd entry */ 72 73 #define POLLREMOVE 0x0800 /* remove a cached poll fd from /dev/poll */ 74 75 #ifdef _KERNEL 76 77 /* 78 * Additional private poll flags supported only by strpoll(). 79 * Must be bit-wise distinct from the above POLL flags. 80 */ 81 #define POLLRDDATA 0x0200 /* Wait for M_DATA; ignore M_PROTO only msgs */ 82 #define POLLNOERR 0x0400 /* Ignore POLLERR conditions */ 83 84 #define POLLCLOSED 0x8000 /* a (cached) poll fd has been closed */ 85 86 #endif /* _KERNEL */ 87 88 #if defined(_KERNEL) || defined(_KMEMUSER) 89 90 #include <sys/thread.h> 91 92 /* 93 * XXX We are forced to use a forward reference here because including 94 * file.h here will break i386 build. The real solution is to fix the 95 * broken parts in usr/src/stand/lib/fs. 96 */ 97 struct fpollinfo; 98 99 /* 100 * Poll list head structure. A pointer to this is passed to 101 * pollwakeup() from the caller indicating an event has occurred. 102 * Only the ph_list field is used, but for DDI compliance, we can't 103 * change the size of the structure. 104 */ 105 typedef struct pollhead { 106 struct polldat *ph_list; /* list of pollers */ 107 void *ph_pad1; /* unused -- see above */ 108 short ph_pad2; /* unused -- see above */ 109 } pollhead_t; 110 111 #if defined(_KERNEL) 112 113 /* 114 * Routine called to notify a process of the occurrence 115 * of an event. 116 */ 117 extern void pollwakeup(pollhead_t *, short); 118 119 /* 120 * Internal routines. 121 */ 122 extern void polllock(pollhead_t *, kmutex_t *); 123 extern int pollunlock(void); 124 extern void pollrelock(int); 125 extern void pollcleanup(void); 126 extern void pollblockexit(struct fpollinfo *); 127 extern void pollcacheclean(struct fpollinfo *, int); 128 129 /* 130 * public poll head interface: 131 * 132 * pollhead_clean clean up all polldats on a pollhead list 133 */ 134 extern void pollhead_clean(pollhead_t *); 135 136 #endif /* defined(_KERNEL) */ 137 138 #endif /* defined(_KERNEL) || defined(_KMEMUSER) */ 139 140 #if !defined(_KERNEL) 141 #if defined(__STDC__) 142 int poll(struct pollfd *, nfds_t, int); 143 #else 144 int poll(); 145 #endif /* __STDC__ */ 146 #endif /* !_KERNEL */ 147 148 #ifdef __cplusplus 149 } 150 #endif 151 152 #endif /* _SYS_POLL_H */ 153