BSD 4_4 release

[unix-history] / usr / src / sys / sys / cdefs.h

diff --git a/usr/src/sys/sys/cdefs.h b/usr/src/sys/sys/cdefs.h
index 3bf74c9..a04665e 100644 (file)
--- a/usr/src/sys/sys/cdefs.h
+++ b/usr/src/sys/sys/cdefs.h
@@ -1,10 +1,36 @@
 /*
 /*

- * Copyright (c) 1991 The Regents of the University of California.
- * All rights reserved.
+ * Copyright (c) 1991, 1993
+ *     The Regents of the University of California.  All rights reserved.

  *
  *

- * %sccs.include.redist.c%
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed by the University of
+ *     California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.

  *
  *

- *     @(#)cdefs.h     7.6 (Berkeley) %G%
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *     @(#)cdefs.h     8.1 (Berkeley) 6/2/93

  */
 
 #ifndef        _CDEFS_H_
  */
 
 #ifndef        _CDEFS_H_


@@ -49,4 +75,20 @@
 #endif /* !__GNUC__ */
 #endif /* !(__STDC__ || __cplusplus) */
 
 #endif /* !__GNUC__ */
 #endif /* !(__STDC__ || __cplusplus) */
 

+/*
+ * GCC has extensions for declaring functions as `pure' (always returns
+ * the same value given the same inputs, i.e., has no external state and
+ * no side effects) and `dead' (nonreturning).  These mainly affect
+ * optimization and warnings.  Unfortunately, GCC complains if these are
+ * used under strict ANSI mode (`gcc -ansi -pedantic'), hence we need to
+ * define them only if compiling without this.
+ */
+#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
+#define __dead __volatile
+#define __pure __const
+#else
+#define __dead
+#define __pure
+#endif
+

 #endif /* !_CDEFS_H_ */
 #endif /* !_CDEFS_H_ */