1 /* Copyright (C) 1997,1998,2000,2002,2003,2004 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
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.
8
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.
13
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/>. */
17
18 #include <pthreadP.h>
19 #include <errno.h>
20 #include <signal.h>
21 #define __need_NULL
22 #include <stddef.h>
23 #include <string.h>
24
25 #include <sysdep-cancel.h>
26 #include <sys/syscall.h>
27
28 #ifdef __NR_rt_sigtimedwait
29
30 static int
do_sigwaitinfo(const sigset_t * set,siginfo_t * info)31 do_sigwaitinfo (const sigset_t *set, siginfo_t *info)
32 {
33 #ifdef SIGCANCEL
34 sigset_t tmpset;
35 if (set != NULL
36 && (__builtin_expect (__sigismember (set, SIGCANCEL), 0)
37 # ifdef SIGSETXID
38 || __builtin_expect (__sigismember (set, SIGSETXID), 0)
39 # endif
40 ))
41 {
42 /* Create a temporary mask without the bit for SIGCANCEL set. */
43 // We are not copying more than we have to.
44 memcpy (&tmpset, set, _NSIG / 8);
45 __sigdelset (&tmpset, SIGCANCEL);
46 # ifdef SIGSETXID
47 __sigdelset (&tmpset, SIGSETXID);
48 # endif
49 set = &tmpset;
50 }
51 #endif
52
53 /* XXX The size argument hopefully will have to be changed to the
54 real size of the user-level sigset_t. */
55 int result = INLINE_SYSCALL (rt_sigtimedwait, 4, set,
56 info, NULL, _NSIG / 8);
57
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
61 here. */
62 if (result != -1 && info != NULL && info->si_code == SI_TKILL)
63 info->si_code = SI_USER;
64
65 return result;
66 }
67
68
69 /* Return any pending signal or wait for one for the given time. */
70 int
__sigwaitinfo(const sigset_t * set,siginfo_t * info)71 __sigwaitinfo (const sigset_t *set, siginfo_t *info)
72 {
73 if (SINGLE_THREAD_P)
74 return do_sigwaitinfo (set, info);
75
76 int oldtype = LIBC_CANCEL_ASYNC ();
77
78 /* XXX The size argument hopefully will have to be changed to the
79 real size of the user-level sigset_t. */
80 int result = do_sigwaitinfo (set, info);
81
82 LIBC_CANCEL_RESET (oldtype);
83
84 return result;
85 }
86 weak_alias (__sigwaitinfo, sigwaitinfo)
87 #endif
88