New module poll, from Paolo Bonzini <bonzini@gnu.org>.

[gnulib.git] / lib / poll_.h

diff --git a/lib/poll_.h b/lib/poll_.h
new file mode 100644 (file)
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--- /dev/null
+++ b/lib/poll_.h
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+/* Header for poll(2) emulation
+   Contributed by Paolo Bonzini.
+
+   Copyright 2001, 2002, 2003 Free Software Foundation, Inc.
+
+   This file is part of gnulib.
+
+   gnulib 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, or (at your option)
+   any later version.
+
+   gnulib 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 Lesser General Public
+   License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with gnulib; see the file COPYING.LIB.  If not, write to the Free
+   Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+   USA.  
+ */
+
+#ifndef GNULIB_POLL_H
+#define GNULIB_POLL_H
+
+/* fake a poll(2) environment */
+#define POLLIN      0x0001     /* any readable data available   */
+#define POLLPRI     0x0002     /* OOB/Urgent readable data      */
+#define POLLOUT     0x0004     /* file descriptor is writeable  */
+#define POLLERR     0x0008     /* some poll error occurred      */
+#define POLLHUP     0x0010     /* file descriptor was "hung up" */
+#define POLLNVAL    0x0020     /* requested events "invalid"    */
+#define POLLRDNORM  0x0040
+#define POLLRDBAND  0x0080
+#define POLLWRNORM  0x0100
+#define POLLWRBAND  0x0200
+
+struct pollfd
+{
+  int fd;                      /* which file descriptor to poll */
+  short events;                        /* events we are interested in   */
+  short revents;               /* events found on return        */
+};
+
+typedef unsigned long nfds_t;
+
+extern int poll (struct pollfd *pfd, nfds_t nfd, int timeout);
+
+/* Define INFTIM only if doing so conforms to POSIX.  */
+#if !defined (_POSIX_C_SOURCE) && !defined (_XOPEN_SOURCE)
+#define INFTIM (-1)
+#endif
+
+#endif