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git.ipfire.org Git - thirdparty/glibc.git/blob - sysdeps/unix/sysv/linux/sigwaitinfo.c
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1 /* Copyright (C) 1997-2015 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
24 #include <nptl/pthreadP.h>
25 #include <sysdep-cancel.h>
26 #include <sys/syscall.h>
28 #ifdef __NR_rt_sigtimedwait
30 /* Return any pending signal or wait for one for the given time. */
32 __sigwaitinfo (const sigset_t
*set
, siginfo_t
*info
)
37 && (__builtin_expect (__sigismember (set
, SIGCANCEL
), 0)
39 || __builtin_expect (__sigismember (set
, SIGSETXID
), 0)
43 /* Create a temporary mask without the bit for SIGCANCEL set. */
44 // We are not copying more than we have to.
45 memcpy (&tmpset
, set
, _NSIG
/ 8);
46 __sigdelset (&tmpset
, SIGCANCEL
);
48 __sigdelset (&tmpset
, SIGSETXID
);
54 /* XXX The size argument hopefully will have to be changed to the
55 real size of the user-level sigset_t. */
56 int result
= SYSCALL_CANCEL (rt_sigtimedwait
, set
, info
, NULL
, _NSIG
/ 8);
58 /* The kernel generates a SI_TKILL code in si_code in case tkill is
59 used. tkill is transparently used in raise(). Since having
60 SI_TKILL as a code is useful in general we fold the results
62 if (result
!= -1 && info
!= NULL
&& info
->si_code
== SI_TKILL
)
63 info
->si_code
= SI_USER
;
68 libc_hidden_def (__sigwaitinfo
)
69 weak_alias (__sigwaitinfo
, sigwaitinfo
)
71 # include <signal/sigwaitinfo.c>
73 strong_alias (__sigwaitinfo
, __libc_sigwaitinfo
)