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author | davidxu <davidxu@FreeBSD.org> | 2010-09-10 01:47:37 +0000 |
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committer | davidxu <davidxu@FreeBSD.org> | 2010-09-10 01:47:37 +0000 |
commit | e129c18a83ef78db5e988b3cae51cdbedb5cf4a1 (patch) | |
tree | 2579648b96446e93c456b7056eb0f82f3e49c059 /lib/libc/sys/sigwait.c | |
parent | b27a644a18fdb284e46c52ec4b91be23562b515e (diff) | |
download | FreeBSD-src-e129c18a83ef78db5e988b3cae51cdbedb5cf4a1.zip FreeBSD-src-e129c18a83ef78db5e988b3cae51cdbedb5cf4a1.tar.gz |
Because POSIX does not allow EINTR to be returned from sigwait(),
add a wrapper for it in libc and rework the code in libthr, the
system call still can return EINTR, we keep this feature.
Discussed on: thread
Reviewed by: jilles
Diffstat (limited to 'lib/libc/sys/sigwait.c')
-rw-r--r-- | lib/libc/sys/sigwait.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/lib/libc/sys/sigwait.c b/lib/libc/sys/sigwait.c new file mode 100644 index 0000000..2fdffdd --- /dev/null +++ b/lib/libc/sys/sigwait.c @@ -0,0 +1,46 @@ +/*- + * Copyright (c) 2010 davidxu@freebsd.org + * + * 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <errno.h> +#include <signal.h> + +int __sys_sigwait(const sigset_t * restrict, int * restrict); + +__weak_reference(__sigwait, sigwait); + +int +__sigwait(const sigset_t * restrict set, int * restrict sig) +{ + int ret; + + /* POSIX does not allow EINTR to be returned */ + do { + ret = __sys_sigwait(set, sig); + } while (ret == EINTR); + return (ret); +} |