[src/trunk]: src/lib/libpthread Drop error path from C11 call_once

[kamil <kamil%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/64c7cc861619
branches:  trunk
changeset: 456144:64c7cc861619
user:      kamil <kamil%NetBSD.org@localhost>
date:      Wed Apr 24 21:41:15 2019 +0000

description:
Drop error path from C11 call_once

The original implementation of C11 threads(3) contained check for error
paths, but it was stripped in the calls that are documented to return
no status from an operation. Do the same in call_once(3).

diffstat:

 lib/libpthread/call_once.c |  14 ++++++--------
 1 files changed, 6 insertions(+), 8 deletions(-)

diffs (36 lines):

diff -r e8c185c97e66 -r 64c7cc861619 lib/libpthread/call_once.c
--- a/lib/libpthread/call_once.c        Wed Apr 24 20:53:10 2019 +0000
+++ b/lib/libpthread/call_once.c        Wed Apr 24 21:41:15 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: call_once.c,v 1.1 2019/04/24 11:43:19 kamil Exp $      */
+/*     $NetBSD: call_once.c,v 1.2 2019/04/24 21:41:15 kamil Exp $      */
 
 /*-
  * Copyright (c) 2016 The NetBSD Foundation, Inc.
@@ -30,12 +30,10 @@
  */
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: call_once.c,v 1.1 2019/04/24 11:43:19 kamil Exp $");
+__RCSID("$NetBSD: call_once.c,v 1.2 2019/04/24 21:41:15 kamil Exp $");
 
 #include <assert.h>
-#include <err.h>
 #include <pthread.h>
-#include <stdlib.h>
 #include <threads.h>
 
 void
@@ -45,8 +43,8 @@
        _DIAGASSERT(flag != NULL);
        _DIAGASSERT(func != NULL);
 
-       /* The call_once(3) function returns no value, this forces this code to
-        * break as there is nothing better available. */
-       if (pthread_once(flag, func) != 0)
-               errx(EXIT_FAILURE, "pthread_once failed");
+       /*
+        * The call_once(3) function that conforms to C11 returns no value.
+        */
+       (void)pthread_once(flag, func);
 }