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 bee8175..a04665e 100644 (file)
--- a/usr/src/sys/sys/cdefs.h
+++ b/usr/src/sys/sys/cdefs.h
@@ -1,37 +1,94 @@
 /*
 /*

- * Copyright (c) 1988 The Regents of the University of California.
- * All rights reserved.
+ * Copyright (c) 1991, 1993
+ *     The Regents of the University of California.  All rights reserved.

  *
  *

- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by the University of California, Berkeley.  The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ * 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     7.1 (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_
+#define        _CDEFS_H_
+
+#if defined(__cplusplus)
+#define        __BEGIN_DECLS   extern "C" {
+#define        __END_DECLS     };
+#else
+#define        __BEGIN_DECLS
+#define        __END_DECLS
+#endif
+

 /*
 /*

- * This file is designed to ease the porting from standard C to ANSI C.
- * It will eventually go away.
- * Questions to K. Bostic.
+ * The __CONCAT macro is used to concatenate parts of symbol names, e.g.
+ * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
+ * The __CONCAT macro is a bit tricky -- make sure you don't put spaces
+ * in between its arguments.  __CONCAT can also concatenate double-quoted
+ * strings produced by the __STRING macro, but this only works with ANSI C.

  */
  */

+#if defined(__STDC__) || defined(__cplusplus)
+#define        __P(protos)     protos          /* full-blown ANSI C */
+#define        __CONCAT(x,y)   x ## y
+#define        __STRING(x)     #x

 
 

-#ifdef __STDC__
-#define        CONCAT(x,y)     x ## y
-#define        PROTOTYPE(p)    p
-#define        STRING(x)       #x
-#else
-#define        const
-#define        volatile
+#else  /* !(__STDC__ || __cplusplus) */
+#define        __P(protos)     ()              /* traditional C preprocessor */
+#define        __CONCAT(x,y)   x/**/y
+#define        __STRING(x)     "x"
+
+#ifdef __GNUC__
+#define        const           __const         /* GCC: ANSI C with -traditional */
+#define        inline          __inline
+#define        signed          __signed
+#define        volatile        __volatile
+
+#else  /* !__GNUC__ */
+#define        const                           /* delete ANSI C keywords */
+#define        inline

 #define        signed
 #define        signed

-#define        CONCAT(x,y)     x/**/y
-#define        PROTOTYPE(p)    ()
-#define        STRING(x)       "x"
+#define        volatile
+#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

+
+#endif /* !_CDEFS_H_ */