Implement vlc_poll() on OS/2

Modified-and...
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

configure.ac

@@ -566,7 +566,7 @@ dnl Check for poll
 AC_SEARCH_LIBS(poll, [poll], [
   AC_DEFINE(HAVE_POLL, 1, [Define to 1 if the OS has poll().])
 ], [
-  AS_IF([test "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"], [
+  AS_IF([test "${SYS}" != "mingw32" -a "${SYS}" != "mingwce" -a "${SYS}" != "os2"], [
     AC_MSG_ERROR([poll() is required.])
   ])
 ])

src/Makefile.am

@@ -281,6 +281,7 @@ SOURCES_libvlc_os2 = \
 	misc/atomic.c \
 	posix/filesystem.c \
 	posix/plugin.c \
+	os2/poll.c \
 	os2/thread.c \
 	os2/specific.c \
 	$(NULL)

src/os2/poll.c

@@ -0,0 +1,109 @@
+/*****************************************************************************
+ * poll.c: poll() emulation for OS/2
+ *****************************************************************************
+ * Copyright © 2011 KO Myung-Hun <komh@chollian.et>
+ * Copyright © 2007 Rémi Denis-Courmont
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/time.h>
+
+#include <vlc_common.h>
+#include <vlc_network.h>
+
+int vlc_poll (struct pollfd *fds, unsigned nfds, int timeout)
+{
+    fd_set rdset;
+    fd_set wrset;
+    fd_set exset;
+    struct timeval tv = { 0, 0 };
+    int val;
+
+resume:
+    val = -1;
+    vlc_testcancel ();
+
+    FD_ZERO (&rdset);
+    FD_ZERO (&wrset);
+    FD_ZERO (&exset);
+    for (unsigned i = 0; i < nfds; i++)
+    {
+        int fd = fds[i].fd;
+
+        if (fds[i].fd >= FD_SETSIZE)
+        {
+            errno = EINVAL;
+            return -1;
+        }
+
+        if (val < fd)
+            val = fd;
+
+        if (fds[i].events & POLLIN)
+            FD_SET (fd, &rdset);
+        if (fds[i].events & POLLOUT)
+            FD_SET (fd, &wrset);
+        if (fds[i].events & POLLPRI)
+            FD_SET (fd, &exset);
+    }
+
+#ifndef HAVE_ALERTABLE_SELECT
+# warning FIXME! Fix cancellation and remove this crap.
+    if ((timeout < 0) || (timeout > 50))
+    {
+        tv.tv_sec = 0;
+        tv.tv_usec = 50000;
+    }
+    else
+#endif
+    if (timeout >= 0)
+    {
+        div_t d = div (timeout, 1000);
+        tv.tv_sec = d.quot;
+        tv.tv_usec = d.rem * 1000;
+    }
+
+    val = select (val + 1, &rdset, &wrset, &exset, &tv);
+
+#ifndef HAVE_ALERTABLE_SELECT
+    if (val == 0)
+    {
+        if (timeout > 0)
+            timeout -= (timeout > 50) ? 50 : timeout;
+        if (timeout != 0)
+            goto resume;
+    }
+#endif
+
+    if (val == -1)
+        return -1;
+
+    for (unsigned i = 0; i < nfds; i++)
+    {
+        int fd = fds[i].fd;
+        fds[i].revents = (FD_ISSET (fd, &rdset) ? POLLIN : 0)
+                       | (FD_ISSET (fd, &wrset) ? POLLOUT : 0)
+                       | (FD_ISSET (fd, &exset) ? POLLPRI : 0);
+    }
+    return val;
+}

src/win32/poll.c

@@ -35,12 +35,6 @@
 #define FD_SETSIZE 0
 #include <vlc_network.h>
 
-#ifdef __OS2__
-#include <sys/time.h>
-#include <sys/select.h>
-#define SOCKET unsigned
-#endif
-
 int vlc_poll (struct pollfd *fds, unsigned nfds, int timeout)
 {
     size_t setsize = sizeof (fd_set) + nfds * sizeof (SOCKET);