1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 23*0Sstevel@tonic-gate /* All Rights Reserved */ 24*0Sstevel@tonic-gate 25*0Sstevel@tonic-gate 26*0Sstevel@tonic-gate /* 27*0Sstevel@tonic-gate * Copyright (c) 1995, 1998 by Sun Microsystems, Inc. 28*0Sstevel@tonic-gate * All rights reserved. 29*0Sstevel@tonic-gate */ 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate #ifndef _SYS_POLL_H 32*0Sstevel@tonic-gate #define _SYS_POLL_H 33*0Sstevel@tonic-gate 34*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 11.9 */ 35*0Sstevel@tonic-gate 36*0Sstevel@tonic-gate #ifdef __cplusplus 37*0Sstevel@tonic-gate extern "C" { 38*0Sstevel@tonic-gate #endif 39*0Sstevel@tonic-gate 40*0Sstevel@tonic-gate /* 41*0Sstevel@tonic-gate * Structure of file descriptor/event pairs supplied in 42*0Sstevel@tonic-gate * the poll arrays. 43*0Sstevel@tonic-gate */ 44*0Sstevel@tonic-gate typedef struct pollfd { 45*0Sstevel@tonic-gate int fd; /* file desc to poll */ 46*0Sstevel@tonic-gate short events; /* events of interest on fd */ 47*0Sstevel@tonic-gate short revents; /* events that occurred on fd */ 48*0Sstevel@tonic-gate } pollfd_t; 49*0Sstevel@tonic-gate 50*0Sstevel@tonic-gate typedef unsigned long nfds_t; 51*0Sstevel@tonic-gate 52*0Sstevel@tonic-gate /* 53*0Sstevel@tonic-gate * Testable select events 54*0Sstevel@tonic-gate */ 55*0Sstevel@tonic-gate #define POLLIN 0x0001 /* fd is readable */ 56*0Sstevel@tonic-gate #define POLLPRI 0x0002 /* high priority info at fd */ 57*0Sstevel@tonic-gate #define POLLOUT 0x0004 /* fd is writeable (won't block) */ 58*0Sstevel@tonic-gate #define POLLRDNORM 0x0040 /* normal data is readable */ 59*0Sstevel@tonic-gate #define POLLWRNORM POLLOUT 60*0Sstevel@tonic-gate #define POLLRDBAND 0x0080 /* out-of-band data is readable */ 61*0Sstevel@tonic-gate #define POLLWRBAND 0x0100 /* out-of-band data is writeable */ 62*0Sstevel@tonic-gate 63*0Sstevel@tonic-gate #define POLLNORM POLLRDNORM 64*0Sstevel@tonic-gate 65*0Sstevel@tonic-gate /* 66*0Sstevel@tonic-gate * Non-testable poll events (may not be specified in events field, 67*0Sstevel@tonic-gate * but may be returned in revents field). 68*0Sstevel@tonic-gate */ 69*0Sstevel@tonic-gate #define POLLERR 0x0008 /* fd has error condition */ 70*0Sstevel@tonic-gate #define POLLHUP 0x0010 /* fd has been hung up on */ 71*0Sstevel@tonic-gate #define POLLNVAL 0x0020 /* invalid pollfd entry */ 72*0Sstevel@tonic-gate 73*0Sstevel@tonic-gate #define POLLREMOVE 0x0800 /* remove a cached poll fd from /dev/poll */ 74*0Sstevel@tonic-gate 75*0Sstevel@tonic-gate #ifdef _KERNEL 76*0Sstevel@tonic-gate 77*0Sstevel@tonic-gate /* 78*0Sstevel@tonic-gate * Additional private poll flags supported only by strpoll(). 79*0Sstevel@tonic-gate * Must be bit-wise distinct from the above POLL flags. 80*0Sstevel@tonic-gate */ 81*0Sstevel@tonic-gate #define POLLRDDATA 0x0200 /* Wait for M_DATA; ignore M_PROTO only msgs */ 82*0Sstevel@tonic-gate #define POLLNOERR 0x0400 /* Ignore POLLERR conditions */ 83*0Sstevel@tonic-gate 84*0Sstevel@tonic-gate #define POLLCLOSED 0x8000 /* a (cached) poll fd has been closed */ 85*0Sstevel@tonic-gate 86*0Sstevel@tonic-gate #endif /* _KERNEL */ 87*0Sstevel@tonic-gate 88*0Sstevel@tonic-gate #if defined(_KERNEL) || defined(_KMEMUSER) 89*0Sstevel@tonic-gate 90*0Sstevel@tonic-gate #include <sys/thread.h> 91*0Sstevel@tonic-gate 92*0Sstevel@tonic-gate /* 93*0Sstevel@tonic-gate * XXX We are forced to use a forward reference here because including 94*0Sstevel@tonic-gate * file.h here will break i386 build. The real solution is to fix the 95*0Sstevel@tonic-gate * broken parts in usr/src/stand/lib/fs. 96*0Sstevel@tonic-gate */ 97*0Sstevel@tonic-gate struct fpollinfo; 98*0Sstevel@tonic-gate 99*0Sstevel@tonic-gate /* 100*0Sstevel@tonic-gate * Poll list head structure. A pointer to this is passed to 101*0Sstevel@tonic-gate * pollwakeup() from the caller indicating an event has occurred. 102*0Sstevel@tonic-gate * Only the ph_list field is used, but for DDI compliance, we can't 103*0Sstevel@tonic-gate * change the size of the structure. 104*0Sstevel@tonic-gate */ 105*0Sstevel@tonic-gate typedef struct pollhead { 106*0Sstevel@tonic-gate struct polldat *ph_list; /* list of pollers */ 107*0Sstevel@tonic-gate void *ph_pad1; /* unused -- see above */ 108*0Sstevel@tonic-gate short ph_pad2; /* unused -- see above */ 109*0Sstevel@tonic-gate } pollhead_t; 110*0Sstevel@tonic-gate 111*0Sstevel@tonic-gate #if defined(_KERNEL) 112*0Sstevel@tonic-gate 113*0Sstevel@tonic-gate /* 114*0Sstevel@tonic-gate * Routine called to notify a process of the occurrence 115*0Sstevel@tonic-gate * of an event. 116*0Sstevel@tonic-gate */ 117*0Sstevel@tonic-gate extern void pollwakeup(pollhead_t *, short); 118*0Sstevel@tonic-gate 119*0Sstevel@tonic-gate /* 120*0Sstevel@tonic-gate * Internal routines. 121*0Sstevel@tonic-gate */ 122*0Sstevel@tonic-gate extern void polllock(pollhead_t *, kmutex_t *); 123*0Sstevel@tonic-gate extern int pollunlock(void); 124*0Sstevel@tonic-gate extern void pollrelock(int); 125*0Sstevel@tonic-gate extern void pollcleanup(void); 126*0Sstevel@tonic-gate extern void pollblockexit(struct fpollinfo *); 127*0Sstevel@tonic-gate extern void pollcacheclean(struct fpollinfo *, int); 128*0Sstevel@tonic-gate 129*0Sstevel@tonic-gate /* 130*0Sstevel@tonic-gate * public poll head interface: 131*0Sstevel@tonic-gate * 132*0Sstevel@tonic-gate * pollhead_clean clean up all polldats on a pollhead list 133*0Sstevel@tonic-gate */ 134*0Sstevel@tonic-gate extern void pollhead_clean(pollhead_t *); 135*0Sstevel@tonic-gate 136*0Sstevel@tonic-gate #endif /* defined(_KERNEL) */ 137*0Sstevel@tonic-gate 138*0Sstevel@tonic-gate #endif /* defined(_KERNEL) || defined(_KMEMUSER) */ 139*0Sstevel@tonic-gate 140*0Sstevel@tonic-gate #if !defined(_KERNEL) 141*0Sstevel@tonic-gate #if defined(__STDC__) 142*0Sstevel@tonic-gate int poll(struct pollfd *, nfds_t, int); 143*0Sstevel@tonic-gate #else 144*0Sstevel@tonic-gate int poll(); 145*0Sstevel@tonic-gate #endif /* __STDC__ */ 146*0Sstevel@tonic-gate #endif /* !_KERNEL */ 147*0Sstevel@tonic-gate 148*0Sstevel@tonic-gate #ifdef __cplusplus 149*0Sstevel@tonic-gate } 150*0Sstevel@tonic-gate #endif 151*0Sstevel@tonic-gate 152*0Sstevel@tonic-gate #endif /* _SYS_POLL_H */ 153