1  /* Copyright (C) 1992-2023 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     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <signal.h>
      19  #include <time.h>
      20  #include <unistd.h>
      21  #include <mach.h>
      22  #include <sysdep-cancel.h>
      23  
      24  /* Make the process sleep for SECONDS seconds, or until a signal arrives
      25     and is not ignored.  The function returns the number of seconds less
      26     than SECONDS which it actually slept (zero if it slept the full time).
      27     There is no return value to indicate error, but if `sleep' returns
      28     SECONDS, it probably didn't work.  */
      29  unsigned int
      30  __sleep (unsigned int seconds)
      31  {
      32    time_t before, after;
      33    mach_port_t recv;
      34    int cancel_oldtype;
      35  
      36    recv = __mach_reply_port ();
      37  
      38    before = time_now ();
      39    cancel_oldtype = LIBC_CANCEL_ASYNC();
      40    (void) __mach_msg (NULL, MACH_RCV_MSG|MACH_RCV_TIMEOUT|MACH_RCV_INTERRUPT,
      41  		     0, 0, recv, seconds * 1000, MACH_PORT_NULL);
      42    LIBC_CANCEL_RESET (cancel_oldtype);
      43    after = time_now ();
      44    __mach_port_destroy (__mach_task_self (), recv);
      45  
      46    return seconds - (after - before);
      47  }
      48  weak_alias (__sleep, sleep)