Adding upstream version 14.2.upstream/14.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 235 insertions, 0 deletions

diff --git a/src/pulsecore/poll-posix.c b/src/pulsecore/poll-posix.c
new file mode 100644
index 0000000..e232295
--- /dev/null
+++ b/src/pulsecore/poll-posix.c
@@ -0,0 +1,235 @@
+
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio 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
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+/***
+   Based on work for the GNU C Library.
+   Copyright (C) 1994, 1996, 1997 Free Software Foundation, Inc.
+***/
+
+/* 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
+
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+
+#include <errno.h>
+#include <fcntl.h>
+
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+
+#include <pulsecore/socket.h>
+#include <pulsecore/core-util.h>
+#include <pulse/util.h>
+
+#include "poll.h"
+
+/* Mac OSX fails to implement poll() in a working way since 10.4. IOW, for
+ * several years. We need to enable a dirty workaround and emulate that call
+ * with select(), just like for Windows. sic! */
+
+#if !defined(HAVE_POLL_H) || defined(OS_IS_DARWIN)
+
+int pa_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;
+#ifdef OS_IS_WIN32
+    char data[64];
+#endif
+
+    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(maxfd + 1, &rset, &wset, &xset, (timeout == -1 ? NULL : &tv));
+
+    if ((ready == -1) && (errno == EBADF)) {
+        ready = 0;
+        maxfd = -1;
+
+#ifdef OS_IS_WIN32
+        /*
+         * Windows has no fcntl(), so we have to trick around with more
+         * select() calls to find out what went wrong
+         */
+
+        FD_ZERO (&rset);
+        FD_ZERO (&wset);
+        FD_ZERO (&xset);
+
+        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(f->fd, &rset, &wset, &xset, &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;
+                }
+            }
+        }
+
+#else /* !OS_IS_WIN32 */
+
+        for (f = fds; f < &fds[nfds]; f++)
+            if (f->fd != -1) {
+                /* use fcntl() to find out whether the descriptor is valid */
+                if (fcntl(f->fd, F_GETFL) != -1) {
+                    if (f->fd > maxfd && (f->events & (POLLIN|POLLOUT|POLLPRI))) {
+                        maxfd = f->fd;
+                        ready++;
+                    }
+                } else {
+                    FD_CLR(f->fd, &rset);
+                    FD_CLR(f->fd, &wset);
+                    FD_CLR(f->fd, &xset);
+                }
+            }
+
+#endif
+
+        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(maxfd + 1, &rset, &wset, &xset, (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! */
+#ifdef OS_IS_DARWIN
+                    /* There is a bug in Mac OS X that causes it to ignore MSG_PEEK
+                     * for some kinds of descriptors.  Detect if this descriptor is a
+                     * connected socket, a server socket, or something else using a
+                     * 0-byte recv, and use ioctl(2) to detect POLLHUP.  */
+                    int r = recv(f->fd, NULL, 0, MSG_PEEK);
+                    if (r == 0 || (r < 0 && errno == ENOTSOCK))
+                        ioctl(f->fd, FIONREAD, &r);
+
+                    if (r == 0)
+                        f->revents |= POLLHUP;
+#else /* !OS_IS_DARWIN */
+                    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;
+                        }
+                    }
+#endif
+
+                    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 */