mirror of
https://github.com/freebsd/freebsd-src.git
synced 2024-11-28 15:32:45 +00:00
663fc9cc7c
poll(2), readv(2), select(2), wait4(2), writev(2). PR: bin/37658 Reviewed by: deischen MFC after: 1 week
112 lines
3.4 KiB
C
112 lines
3.4 KiB
C
/*
|
|
* Copyright (c) 1999 Daniel Eischen <eischen@vigrid.com>
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Daniel Eischen.
|
|
* 4. Neither the name of the author nor the names of any co-contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY DANIEL EISCHEN 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 AUTHOR 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <poll.h>
|
|
#include <sys/types.h>
|
|
#include <sys/time.h>
|
|
#include <sys/fcntl.h>
|
|
#include <pthread.h>
|
|
#include "pthread_private.h"
|
|
|
|
__weak_reference(__poll, poll);
|
|
|
|
int
|
|
_poll(struct pollfd *fds, unsigned int nfds, int timeout)
|
|
{
|
|
struct pthread *curthread = _get_curthread();
|
|
struct timespec ts;
|
|
int numfds = nfds;
|
|
int i, ret = 0;
|
|
struct pthread_poll_data data;
|
|
|
|
if (numfds > _thread_dtablesize) {
|
|
numfds = _thread_dtablesize;
|
|
}
|
|
/* Check if a timeout was specified: */
|
|
if (timeout == INFTIM) {
|
|
/* Wait for ever: */
|
|
_thread_kern_set_timeout(NULL);
|
|
} else if (timeout > 0) {
|
|
/* Convert the timeout in msec to a timespec: */
|
|
ts.tv_sec = timeout / 1000;
|
|
ts.tv_nsec = (timeout % 1000) * 1000000;
|
|
|
|
/* Set the wake up time: */
|
|
_thread_kern_set_timeout(&ts);
|
|
} else if (timeout < 0) {
|
|
/* a timeout less than zero but not == INFTIM is invalid */
|
|
errno = EINVAL;
|
|
return (-1);
|
|
}
|
|
|
|
if (((ret = __sys_poll(fds, numfds, 0)) == 0) && (timeout != 0)) {
|
|
data.nfds = numfds;
|
|
data.fds = fds;
|
|
|
|
/*
|
|
* Clear revents in case of a timeout which leaves fds
|
|
* unchanged:
|
|
*/
|
|
for (i = 0; i < numfds; i++) {
|
|
fds[i].revents = 0;
|
|
}
|
|
|
|
curthread->data.poll_data = &data;
|
|
curthread->interrupted = 0;
|
|
_thread_kern_sched_state(PS_POLL_WAIT, __FILE__, __LINE__);
|
|
if (curthread->interrupted) {
|
|
errno = EINTR;
|
|
ret = -1;
|
|
} else {
|
|
ret = data.nfds;
|
|
}
|
|
}
|
|
|
|
return (ret);
|
|
}
|
|
|
|
int
|
|
__poll(struct pollfd *fds, unsigned int nfds, int timeout)
|
|
{
|
|
int ret;
|
|
|
|
_thread_enter_cancellation_point();
|
|
ret = _poll(fds, nfds, timeout);
|
|
_thread_leave_cancellation_point();
|
|
|
|
return ret;
|
|
}
|