* sysdeps/unix/sysv/linux/bits/sched.h: Declare sched_getcpu.
[glibc.git] / sysdeps / unix / sysv / linux / sigwaitinfo.c
blob80790df9eb08d388b8d154eece94295aa727ae28
1 /* Copyright (C) 1997,1998,2000,2002,2003,2004, 2005 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, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #include <errno.h>
20 #include <signal.h>
21 #define __need_NULL
22 #include <stddef.h>
23 #include <string.h>
25 #include <sysdep-cancel.h>
26 #include <sys/syscall.h>
27 #include <bp-checks.h>
29 #ifdef __NR_rt_sigtimedwait
31 static int
32 do_sigwaitinfo (const sigset_t *set, siginfo_t *info)
34 #ifdef SIGCANCEL
35 sigset_t tmpset;
36 if (set != NULL
37 && (__builtin_expect (__sigismember (set, SIGCANCEL), 0)
38 # ifdef SIGSETXID
39 || __builtin_expect (__sigismember (set, SIGSETXID), 0)
40 # endif
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);
47 # ifdef SIGSETXID
48 __sigdelset (&tmpset, SIGSETXID);
49 # endif
50 set = &tmpset;
52 #endif
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 = INLINE_SYSCALL (rt_sigtimedwait, 4, CHECK_SIGSET (set),
57 CHECK_1 (info), NULL, _NSIG / 8);
59 /* The kernel generates a SI_TKILL code in si_code in case tkill is
60 used. tkill is transparently used in raise(). Since having
61 SI_TKILL as a code is useful in general we fold the results
62 here. */
63 if (result != -1 && info != NULL && info->si_code == SI_TKILL)
64 info->si_code = SI_USER;
66 return result;
70 /* Return any pending signal or wait for one for the given time. */
71 int
72 __sigwaitinfo (set, info)
73 const sigset_t *set;
74 siginfo_t *info;
76 if (SINGLE_THREAD_P)
77 return do_sigwaitinfo (set, info);
79 int oldtype = LIBC_CANCEL_ASYNC ();
81 /* XXX The size argument hopefully will have to be changed to the
82 real size of the user-level sigset_t. */
83 int result = do_sigwaitinfo (set, info);
85 LIBC_CANCEL_RESET (oldtype);
87 return result;
89 libc_hidden_def (__sigwaitinfo)
90 weak_alias (__sigwaitinfo, sigwaitinfo)
91 #else
92 # include <signal/sigwaitinfo.c>
93 #endif
94 strong_alias (__sigwaitinfo, __libc_sigwaitinfo)