/* Copyright (C) 1997-2018 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <errno.h>
#include <signal.h>
#include <string.h>
//#include <stdint.h>

//#include <nptl/pthreadP.h>
#include <sysdep-cancel.h>
#include <y2038-support.h>

int
__sigtimedwait (const sigset_t *set, siginfo_t *info,
		const struct timespec *timeout)
{
  /* XXX The size argument hopefully will have to be changed to the
     real size of the user-level sigset_t.  */
  int result = SYSCALL_CANCEL (rt_sigtimedwait, 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;
}
libc_hidden_def (__sigtimedwait)
weak_alias (__sigtimedwait, sigtimedwait)

/* 64-bit time version */

int
__sigtimedwait_time64 (const sigset_t *set, siginfo_t *info,
		const struct __timespec64 *timeout)
{
  int result;
  struct timespec ts32;
#ifdef __NR_rt_sigtimedwait_time64
  struct __timespec64 ts64;
#endif

#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.  */
#ifdef __NR_rt_sigtimedwait_time64
  if (__y2038_linux_support > 0)
    {
      if (timeout)
        {
          ts64.tv_sec = timeout->tv_sec;
          ts64.tv_nsec = timeout->tv_nsec;
          ts64.tv_pad = 0;
          result = SYSCALL_CANCEL (rt_sigtimedwait_time64, set, info, &ts64, _NSIG / 8);
          if (result == -1 && errno==ENOSYS)
	    {
	      __y2038_linux_support = -1;
	    }
        }
      else
        result = SYSCALL_CANCEL (rt_sigtimedwait, set, info, NULL, _NSIG / 8);
    }
  else
#endif
    {
      if (timeout)
        {
          if (! timespec64_to_timespec(timeout, &ts32))
            {
              errno = EOVERFLOW;
              return -1;
            }
          result = SYSCALL_CANCEL (rt_sigtimedwait, set, info, &ts32, _NSIG / 8);
        }
      else
        result = SYSCALL_CANCEL (rt_sigtimedwait, set, info, NULL, _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;
}