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Import poll() from NetBSD's libnbcompat

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This commit is contained in:
Arun Thomas 2010-07-26 20:46:04 +00:00
parent 541b5c5c38
commit ee1cabf06c
4 changed files with 164 additions and 2 deletions
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2
include/sys/Makefile
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@ -9,6 +9,6 @@ INCS= asynchio.h dir.h file.h ioc_cmos.h ioc_disk.h \
select.h sem.h shm.h sigcontext.h signal.h socket.h \
soundcard.h statfs.h statvfs.h stat.h svrctl.h timeb.h \
time.h times.h types.h ucontext.h ucred.h uio.h un.h \
utsname.h video.h vm.h wait.h cdefs.h null.h
utsname.h video.h vm.h wait.h cdefs.h null.h poll.h
.include <bsd.kinc.mk>

67
include/sys/poll.h Normal file
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@ -0,0 +1,67 @@
/* $NetBSD: poll.h,v 1.3 2008/04/29 05:46:08 martin Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _NBCOMPAT_POLL_H_
#define _NBCOMPAT_POLL_H_
#include <sys/cdefs.h>
typedef unsigned int nfds_t;
struct pollfd {
int fd; /* file descriptor */
short events; /* events to look for */
short revents; /* events returned */
};
/*
* Testable events (may be specified in events field).
*/
#define POLLIN 0x0001
#define POLLPRI 0x0002
#define POLLOUT 0x0004
#define POLLRDNORM 0x0040
#define POLLWRNORM POLLOUT
#define POLLRDBAND 0x0080
#define POLLWRBAND 0x0100
/*
* Non-testable events (may not be specified in events field).
*/
#define POLLERR 0x0008
#define POLLHUP 0x0010
#define POLLNVAL 0x0020
__BEGIN_DECLS
int poll (struct pollfd *, nfds_t, int);
__END_DECLS
#endif /* !_NBCOMPAT_POLL_H_ */

3
lib/libc/posix/Makefile.inc
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@ -110,4 +110,5 @@ SRCS+= \
priority.c \
pread.c \
pwrite.c \
usleep.c
usleep.c \
poll.c

94
lib/libc/posix/poll.c Normal file
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@ -0,0 +1,94 @@
/* $NetBSD: poll.c,v 1.3 2008/04/29 05:46:08 martin Exp $ */
/*-
* Copyright (c) 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles Blundell.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/time.h>
#include <unistd.h>
#include <sys/poll.h>
#include <errno.h>
int
poll(struct pollfd *p, nfds_t nfds, int timout)
{
fd_set read, write, except;
struct timeval tv;
nfds_t i;
int highfd, rval;
/*
* select cannot tell us much wrt POLL*BAND, POLLPRI, POLLHUP or
* POLLNVAL.
*/
FD_ZERO(&read);
FD_ZERO(&write);
FD_ZERO(&except);
highfd = -1;
for (i = 0; i < nfds; i++) {
if (p[i].fd < 0)
continue;
if (p[i].fd >= FD_SETSIZE) {
errno = EINVAL;
return -1;
}
if (p[i].fd > highfd)
highfd = p[i].fd;
if (p[i].events & (POLLIN|POLLRDNORM|POLLRDBAND|POLLPRI))
FD_SET(p[i].fd, &read);
if (p[i].events & (POLLOUT|POLLWRNORM|POLLWRBAND))
FD_SET(p[i].fd, &write);
FD_SET(p[i].fd, &except);
}
tv.tv_sec = timout / 1000;
tv.tv_usec = (timout % 1000) * 1000;
rval = select(highfd + 1, &read, &write, &except,
timout == -1 ? NULL : &tv);
if (rval <= 0)
return rval;
rval = 0;
for (i = 0; i < nfds; i++) {
p[i].revents = 0;
if (FD_ISSET(p[i].fd, &read))
p[i].revents |= POLLIN|POLLRDNORM|POLLRDBAND|POLLPRI;
if (FD_ISSET(p[i].fd, &write))
p[i].revents |= POLLOUT|POLLWRNORM|POLLWRBAND;
if (FD_ISSET(p[i].fd, &except))
p[i].revents |= POLLERR;
/* XXX: POLLHUP/POLLNVAL? */
if (p[i].revents != 0)
rval++;
}
return rval;
}