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authorkamil <kamil@NetBSD.org>2016-10-02 13:09:24 +0000
committerkamil <kamil@NetBSD.org>2016-10-02 13:09:24 +0000
commitcc983abfa2fe1f464c33e467a6784298554f92d0 (patch)
tree9a07e493c3ea6d89a655c02659f45139a7a7bda7 /include
parent5552443b347985acbf69eca8c76f1731bab0b0d8 (diff)
Import <stdnoreturn.h>
This header conforms to the C11 standard Reference: ISO/IEC 9899:201x 7.23 _Noreturn <stdnoreturn.h> According to ISO/IEC 9899:201x (draft) <stdnoreturn.> defines the noreturn macro which expands to _Noreturn. The _Noreturn keyword appears in a function declaration and specifies that the function does not return by reaching the end of the function body. Design choices: - don't implicitly break C++ code including this header with #error C++11 offers [[noreturn]] which conflicts with C11 _Noreturn - don't check for __STDC_VERSION__, everybody is free to reuse it with a nonstandard compiler not conforming to C11 but supporting _Noreturn gcc(1) and clang(1) support _Noreturn in -std=c99 and older standards this follows <stdbool.h> choice for not checking for C99 - follow <stdbool.h> and declare the __noreturn_is_defined guard - use a standard header guard (_STDNORETURN_H_), similar to <stdbool.h> Reviewed by <pgoyette> and <joerg>
Diffstat (limited to 'include')
-rw-r--r--include/Makefile9
-rw-r--r--include/stdnoreturn.h42
2 files changed, 47 insertions, 4 deletions
diff --git a/include/Makefile b/include/Makefile
index 039e3f056d4..00ff404bdc5 100644
--- a/include/Makefile
+++ b/include/Makefile
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.141 2015/07/29 00:10:26 christos Exp $
+# $NetBSD: Makefile,v 1.142 2016/10/02 13:09:24 kamil Exp $
# @(#)Makefile 8.2 (Berkeley) 1/4/94
# Doing a make includes builds /usr/include
@@ -19,9 +19,10 @@ INCS= a.out.h aio.h ar.h assert.h atomic.h \
paths.h pwd.h quota.h randomid.h ranlib.h re_comp.h regex.h regexp.h \
resolv.h res_update.h rmt.h sched.h search.h semaphore.h setjmp.h \
string.h sgtty.h signal.h spawn.h stab.h stddef.h stdio.h \
- stdlib.h strings.h stringlist.h struct.h sysexits.h tar.h time.h \
- ttyent.h tzfile.h ucontext.h ulimit.h unistd.h util.h utime.h utmp.h \
- utmpx.h uuid.h vis.h wchar.h wctype.h wordexp.h
+ stdlib.h stdnoreturn.h strings.h stringlist.h struct.h sysexits.h \
+ tar.h time.h ttyent.h tzfile.h \
+ ucontext.h ulimit.h unistd.h util.h utime.h utmp.h utmpx.h uuid.h \
+ vis.h wchar.h wctype.h wordexp.h
INCS+= arpa/ftp.h arpa/inet.h arpa/nameser.h arpa/nameser_compat.h \
arpa/telnet.h arpa/tftp.h
INCS+= protocols/dumprestore.h protocols/routed.h protocols/rwhod.h \
diff --git a/include/stdnoreturn.h b/include/stdnoreturn.h
new file mode 100644
index 00000000000..91a79a5cab7
--- /dev/null
+++ b/include/stdnoreturn.h
@@ -0,0 +1,42 @@
+/* $NetBSD: stdnoreturn.h,v 1.1 2016/10/02 13:09:24 kamil Exp $ */
+
+/*-
+ * Copyright (c) 2016 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Kamil Rytarowski.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ */
+
+#ifndef _STDNORETURN_H_
+#define _STDNORETURN_H_
+
+/* ISO/IEC 9899:201x 7.23 _Noreturn <stdnoreturn.h> */
+
+#ifndef __noreturn_is_defined
+#define noreturn _Noreturn
+#define __noreturn_is_defined
+#endif /* __noreturn_is_defined */
+
+#endif