From 6f5f2f5fd7ad53b95e3fef6977942edeb70fc1e4 Mon Sep 17 00:00:00 2001 From: ed Date: Mon, 26 Dec 2011 21:51:53 +0000 Subject: Add libstdthreads. This library implements the C11 threads interface on top of the pthreads library. As discussed on the lists, the preferred way to implement this, is as a separate library. It is unlikely that these functions will be used a lot in the future. It would have been easier if the C11 working group standardized (a subset of) pthreads and clock_nanosleep(). Having it as a separate library allows the embedded people to omit it from their system. Discussed on: arch@, threads@ --- lib/libstdthreads/call_once.c | 44 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 lib/libstdthreads/call_once.c (limited to 'lib/libstdthreads/call_once.c') diff --git a/lib/libstdthreads/call_once.c b/lib/libstdthreads/call_once.c new file mode 100644 index 0000000..70ce8de --- /dev/null +++ b/lib/libstdthreads/call_once.c @@ -0,0 +1,44 @@ +/*- + * Copyright (c) 2011 Ed Schouten + * All rights reserved. + * + * 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 AUTHOR 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 AUTHOR 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. + * + * $FreeBSD$ + */ + +#include +__FBSDID("$FreeBSD$"); + +#include + +#include "threads.h" + +void +call_once(once_flag *flag, void (*func)(void)) +{ + + (void)pthread_once((pthread_once_t *)flag, func); +} + +_Static_assert(sizeof(once_flag) == sizeof(pthread_once_t), + "once_flag must be of the same size as pthread_once_t"); -- cgit v1.1