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/* vi: set sw=4 ts=4: */
/*
* __rt_sigtimedwait() for uClibc
*
* Copyright (C) 2006 by Steven Hill <sjhill@realitydiluted.com>
* Copyright (C) 2000-2004 by Erik Andersen <andersen@codepoet.org>
*
* GNU Library General Public License (LGPL) version 2 or later.
*/
#include <sys/syscall.h>
#include <signal.h>
#include <string.h>
#ifdef __NR_rt_sigtimedwait
# ifdef __UCLIBC_HAS_THREADS_NATIVE__
# include <sysdep-cancel.h>
static int do_sigtimedwait(const sigset_t *set, siginfo_t *info,
const struct timespec *timeout)
{
# ifdef SIGCANCEL
sigset_t tmpset;
if (set != NULL && (__builtin_expect (__sigismember (set, SIGCANCEL), 0)
# ifdef SIGSETXID
|| __builtin_expect (__sigismember (set, SIGSETXID), 0)
# endif
))
{
/* Create a temporary mask without the bit for SIGCANCEL set. */
// We are not copying more than we have to.
memcpy (&tmpset, set, _NSIG / 8);
__sigdelset (&tmpset, SIGCANCEL);
# ifdef SIGSETXID
__sigdelset (&tmpset, SIGSETXID);
# endif
set = &tmpset;
}
# endif
/* XXX The size argument hopefully will have to be changed to the
real size of the user-level sigset_t. */
int result = INLINE_SYSCALL (rt_sigtimedwait, 4, set, info,
timeout, _NSIG / 8);
/* The kernel generates a SI_TKILL code in si_code in case tkill is
used. tkill is transparently used in raise(). Since having
SI_TKILL as a code is useful in general we fold the results
here. */
if (result != -1 && info != NULL && info->si_code == SI_TKILL)
info->si_code = SI_USER;
return result;
}
/* Return any pending signal or wait for one for the given time. */
int __sigtimedwait(const sigset_t *set, siginfo_t *info,
const struct timespec *timeout)
{
if(SINGLE_THREAD_P)
return do_sigtimedwait(set, info, timeout);
int oldtype = LIBC_CANCEL_ASYNC();
/* XXX The size argument hopefully will have to be changed to the
real size of the user-level sigset_t. */
int result = do_sigtimedwait(set, info, timeout);
LIBC_CANCEL_RESET(oldtype);
return result;
}
# else
# define __need_NULL
# include <stddef.h>
# define __NR___rt_sigtimedwait __NR_rt_sigtimedwait
static _syscall4(int, __rt_sigtimedwait, const sigset_t *, set,
siginfo_t *, info, const struct timespec *, timeout,
size_t, setsize);
int __sigtimedwait(const sigset_t * set, siginfo_t * info,
const struct timespec *timeout)
{
return __rt_sigtimedwait(set, info, timeout, _NSIG / 8);
}
# endif /* !__UCLIBC_HAS_THREADS_NATIVE__ */
weak_alias(__sigtimedwait,sigtimedwait)
#endif
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