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b40ce4165d
Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
139 lines
3.8 KiB
C
139 lines
3.8 KiB
C
/*
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* Copyright (c) 1995 Steven Wallace
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* IBCS2 message compatibility module.
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*
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/sysproto.h>
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#include <i386/ibcs2/ibcs2_types.h>
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#include <i386/ibcs2/ibcs2_signal.h>
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#include <i386/ibcs2/ibcs2_util.h>
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#include <i386/ibcs2/ibcs2_poll.h>
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#include <i386/ibcs2/ibcs2_proto.h>
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int
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ibcs2_getmsg(td, uap)
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struct thread *td;
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struct ibcs2_getmsg_args *uap;
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{
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return 0; /* fake */
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}
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int
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ibcs2_putmsg(td, uap)
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struct thread *td;
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struct ibcs2_putmsg_args *uap;
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{
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return 0; /* fake */
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}
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int
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ibcs2_poll(td, uap)
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struct thread *td;
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struct ibcs2_poll_args *uap;
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{
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int error, i;
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fd_set *readfds, *writefds, *exceptfds;
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struct timeval *timeout;
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struct ibcs2_poll conv;
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struct select_args tmp_select;
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caddr_t sg = stackgap_init();
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if (uap->nfds > FD_SETSIZE)
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return EINVAL;
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readfds = stackgap_alloc(&sg, sizeof(fd_set *));
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writefds = stackgap_alloc(&sg, sizeof(fd_set *));
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exceptfds = stackgap_alloc(&sg, sizeof(fd_set *));
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timeout = stackgap_alloc(&sg, sizeof(struct timeval *));
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FD_ZERO(readfds);
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FD_ZERO(writefds);
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FD_ZERO(exceptfds);
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if (uap->timeout == -1)
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timeout = NULL;
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else {
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timeout->tv_usec = (uap->timeout % 1000)*1000;
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timeout->tv_sec = uap->timeout / 1000;
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}
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tmp_select.nd = 0;
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tmp_select.in = readfds;
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tmp_select.ou = writefds;
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tmp_select.ex = exceptfds;
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tmp_select.tv = timeout;
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for (i = 0; i < uap->nfds; i++) {
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if ((error = copyin(uap->fds + i*sizeof(struct ibcs2_poll),
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&conv, sizeof(conv))) != 0)
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return error;
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conv.revents = 0;
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if (conv.fd < 0 || conv.fd > FD_SETSIZE)
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continue;
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if (conv.fd >= tmp_select.nd)
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tmp_select.nd = conv.fd + 1;
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if (conv.events & IBCS2_READPOLL)
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FD_SET(conv.fd, readfds);
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if (conv.events & IBCS2_WRITEPOLL)
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FD_SET(conv.fd, writefds);
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FD_SET(conv.fd, exceptfds);
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}
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if ((error = select(td, &tmp_select)) != 0)
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return error;
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if (td->td_retval[0] == 0)
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return 0;
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td->td_retval[0] = 0;
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for (td->td_retval[0] = 0, i = 0; i < uap->nfds; i++) {
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copyin(uap->fds + i*sizeof(struct ibcs2_poll),
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&conv, sizeof(conv));
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conv.revents = 0;
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if (conv.fd < 0 || conv.fd > FD_SETSIZE)
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/* should check for open as well */
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conv.revents |= IBCS2_POLLNVAL;
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else {
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if (FD_ISSET(conv.fd, readfds))
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conv.revents |= IBCS2_POLLIN;
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if (FD_ISSET(conv.fd, writefds))
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conv.revents |= IBCS2_POLLOUT;
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if (FD_ISSET(conv.fd, exceptfds))
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conv.revents |= IBCS2_POLLERR;
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if (conv.revents)
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++td->td_retval[0];
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}
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if ((error = copyout(&conv,
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uap->fds + i*sizeof(struct ibcs2_poll),
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sizeof(conv))) != 0)
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return error;
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}
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return 0;
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}
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