xnu-2050.24.15.tar.gz

[apple/xnu.git] / bsd / sys / poll.h

diff --git a/bsd/sys/poll.h b/bsd/sys/poll.h
index 2a8985c329d3f23f53272cd34db9dbe0f2f325b4..03e44923a81dd5661dc9534f083fa838801fc9c7 100644 (file)
--- a/bsd/sys/poll.h
+++ b/bsd/sys/poll.h
@@ -1,23 +1,29 @@
 /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
  * 
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*-
  * Copyright (c) 1997 Peter Wemm <peter@freebsd.org>
@@ -52,18 +58,12 @@
 #define        _SYS_POLL_H_
 
 /*
- * This file is intended to be compatable with the traditional poll.h.
+ * This file is intended to be compatible with the traditional poll.h.
  */
 
 /*
  * Requestable events.  If poll(2) finds any of these set, they are
  * copied to revents on return.
- * XXX Note that FreeBSD doesn't make much distinction between POLLPRI
- * and POLLRDBAND since none of the file types have distinct priority
- * bands - and only some have an urgent "mode".
- * XXX Note POLLIN isn't really supported in true SVSV terms.  Under SYSV
- * POLLIN includes all of normal, band and urgent data.  Most poll handlers
- * on FreeBSD only treat it as "normal" data.
  */
 #define        POLLIN          0x0001          /* any readable data available */
 #define        POLLPRI         0x0002          /* OOB/Urgent readable data */
@@ -75,7 +75,7 @@
 
 /*
  * FreeBSD extensions: polling on a regular file might return one
- * of these events (currently only supported on UFS).
+ * of these events (currently only supported on local filesystems).
  */
 #define        POLLEXTEND      0x0200          /* file may have been extended */
 #define        POLLATTRIB      0x0400          /* file attributes may have changed */
@@ -93,5 +93,29 @@
 #define        POLLSTANDARD    (POLLIN|POLLPRI|POLLOUT|POLLRDNORM|POLLRDBAND|\
                         POLLWRBAND|POLLERR|POLLHUP|POLLNVAL)
 
+struct pollfd
+{
+       int     fd;
+       short   events;
+       short   revents;
+};
+
+typedef unsigned int nfds_t;
+
+#if !defined(KERNEL)
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+/*
+ * This is defined here (instead of <poll.h>) because this is where
+ * traditional SVR4 code will look to find it.
+ */
+extern int poll (struct pollfd *, nfds_t, int) __DARWIN_ALIAS_C(poll);
+
+__END_DECLS
+
+#endif /* !KERNEL */
 
 #endif /* !_SYS_POLL_H_ */