diff options
Diffstat (limited to 'polyp/poll.c')
| -rw-r--r-- | polyp/poll.c | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/polyp/poll.c b/polyp/poll.c deleted file mode 100644 index 193fc812..00000000 --- a/polyp/poll.c +++ /dev/null @@ -1,190 +0,0 @@ -/* $Id$ */ - -/*** - Copyright (C) 1994, 1996, 1997 Free Software Foundation, Inc. - Copyright (C) 2005, Cendio AB. - This file is part of polypaudio. - Based on work for the GNU C Library. - - polypaudio is free software; you can redistribute it and/or modify it - under the terms of the GNU Library General Public License as published - by the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - polypaudio is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with polypaudio; If not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, - USA. -***/ - -/* Poll the file descriptors described by the NFDS structures starting at - FDS. If TIMEOUT is nonzero and not -1, allow TIMEOUT milliseconds for - an event to occur; if TIMEOUT is -1, block until an event occurs. - Returns the number of file descriptors with events, zero if timed out, - or -1 for errors. */ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#include <errno.h> - -#ifdef HAVE_SYS_SELECT_H -#include <sys/select.h> -#endif - -#include "winsock.h" - -#ifndef HAVE_SYS_POLL_H - -#include "util.h" -#include "poll.h" - -int poll (struct pollfd *fds, unsigned long int nfds, int timeout) { - struct timeval tv; - fd_set rset, wset, xset; - struct pollfd *f; - int ready; - int maxfd = 0; - char data[64]; - - FD_ZERO (&rset); - FD_ZERO (&wset); - FD_ZERO (&xset); - - if (nfds == 0) { - if (timeout >= 0) { - pa_msleep(timeout); - return 0; - } - -#ifdef OS_IS_WIN32 - /* - * Windows does not support signals properly so waiting for them would - * mean a deadlock. - */ - pa_msleep(100); - return 0; -#else - return select(0, NULL, NULL, NULL, NULL); -#endif - } - - for (f = fds; f < &fds[nfds]; ++f) { - if (f->fd != -1) { - if (f->events & POLLIN) - FD_SET (f->fd, &rset); - if (f->events & POLLOUT) - FD_SET (f->fd, &wset); - if (f->events & POLLPRI) - FD_SET (f->fd, &xset); - if (f->fd > maxfd && (f->events & (POLLIN|POLLOUT|POLLPRI))) - maxfd = f->fd; - } - } - - tv.tv_sec = timeout / 1000; - tv.tv_usec = (timeout % 1000) * 1000; - - ready = select ((SELECT_TYPE_ARG1) maxfd + 1, SELECT_TYPE_ARG234 &rset, - SELECT_TYPE_ARG234 &wset, SELECT_TYPE_ARG234 &xset, - SELECT_TYPE_ARG5 (timeout == -1 ? NULL : &tv)); - if ((ready == -1) && (errno == EBADF)) { - ready = 0; - - FD_ZERO (&rset); - FD_ZERO (&wset); - FD_ZERO (&xset); - - maxfd = -1; - - for (f = fds; f < &fds[nfds]; ++f) { - if (f->fd != -1) { - fd_set sngl_rset, sngl_wset, sngl_xset; - - FD_ZERO (&sngl_rset); - FD_ZERO (&sngl_wset); - FD_ZERO (&sngl_xset); - - if (f->events & POLLIN) - FD_SET (f->fd, &sngl_rset); - if (f->events & POLLOUT) - FD_SET (f->fd, &sngl_wset); - if (f->events & POLLPRI) - FD_SET (f->fd, &sngl_xset); - if (f->events & (POLLIN|POLLOUT|POLLPRI)) { - struct timeval singl_tv; - - singl_tv.tv_sec = 0; - singl_tv.tv_usec = 0; - - if (select((SELECT_TYPE_ARG1) f->fd, SELECT_TYPE_ARG234 &rset, - SELECT_TYPE_ARG234 &wset, SELECT_TYPE_ARG234 &xset, - SELECT_TYPE_ARG5 &singl_tv) != -1) { - if (f->events & POLLIN) - FD_SET (f->fd, &rset); - if (f->events & POLLOUT) - FD_SET (f->fd, &wset); - if (f->events & POLLPRI) - FD_SET (f->fd, &xset); - if (f->fd > maxfd && (f->events & (POLLIN|POLLOUT|POLLPRI))) - maxfd = f->fd; - ++ready; - } else if (errno == EBADF) - f->revents |= POLLNVAL; - } - } - } - - if (ready) { - /* Linux alters the tv struct... but it shouldn't matter here ... - * as we're going to be a little bit out anyway as we've just eaten - * more than a couple of cpu cycles above */ - ready = select ((SELECT_TYPE_ARG1) maxfd + 1, SELECT_TYPE_ARG234 &rset, - SELECT_TYPE_ARG234 &wset, SELECT_TYPE_ARG234 &xset, - SELECT_TYPE_ARG5 (timeout == -1 ? NULL : &tv)); - } - } - -#ifdef OS_IS_WIN32 - errno = WSAGetLastError(); -#endif - - if (ready > 0) { - ready = 0; - for (f = fds; f < &fds[nfds]; ++f) { - f->revents = 0; - if (f->fd != -1) { - if (FD_ISSET (f->fd, &rset)) { - /* support for POLLHUP. An hung up descriptor does not - increase the return value! */ - if (recv (f->fd, data, 64, MSG_PEEK) == -1) { - if (errno == ESHUTDOWN || errno == ECONNRESET || - errno == ECONNABORTED || errno == ENETRESET) { - fprintf(stderr, "Hangup\n"); - f->revents |= POLLHUP; - } - } - - if (f->revents == 0) - f->revents |= POLLIN; - } - if (FD_ISSET (f->fd, &wset)) - f->revents |= POLLOUT; - if (FD_ISSET (f->fd, &xset)) - f->revents |= POLLPRI; - } - if (f->revents) - ready++; - } - } - - return ready; -} - -#endif /* HAVE_SYS_POLL_H */ |