nptl/sysdeps/unix/sysv/linux/timer_delete.c

   1 /* Copyright (C) 2003 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public License as
   7    published by the Free Software Foundation; either version 2.1 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #include <errno.h>
  21 #include <stdlib.h>
  22 #include <time.h>
  23 #include <sysdep.h>
  24 #include <kernel-features.h>
  25 #include "kernel-posix-timers.h"
  26
  27
  28 #ifdef __NR_timer_delete
  29 # ifndef __ASSUME_POSIX_TIMERS
  30 static int compat_timer_delete (timer_t timerid);
  31 #  define timer_delete static compat_timer_delete
  32 #  include <nptl/sysdeps/pthread/timer_delete.c>
  33 #  undef timer_delete
  34 # endif
  35
  36 # ifdef timer_delete_alias
  37 #  define timer_delete timer_delete_alias
  38 # endif
  39
  40
  41 int
  42 timer_delete (timerid)
  43      timer_t timerid;
  44 {
  45 # undef timer_delete
  46 # ifndef __ASSUME_POSIX_TIMERS
  47   if (__no_posix_timers >= 0)
  48 # endif
  49     {
  50       struct timer *kt = (struct timer *) timerid;
  51
  52       /* Delete the kernel timer object.  */
  53       int res = INLINE_SYSCALL (timer_delete, 1, kt->ktimerid);
  54
  55       if (res == 0)
  56         {
  57 # ifndef __ASSUME_POSIX_TIMERS
  58           /* We know the syscall support is available.  */
  59           __no_posix_timers = 1;
  60 # endif
  61
  62           /* Free the memory.  */
  63           (void) free (kt);
  64
  65           return 0;
  66         }
  67
  68       /* The kernel timer is not known or something else bad happened.
  69          Return the error.  */
  70 # ifndef __ASSUME_POSIX_TIMERS
  71       if (errno != ENOSYS)
  72         {
  73           __no_posix_timers = 1;
  74 # endif
  75           return -1;
  76 # ifndef __ASSUME_POSIX_TIMERS
  77         }
  78
  79       __no_posix_timers = -1;
  80 # endif
  81     }
  82
  83 # ifndef __ASSUME_POSIX_TIMERS
  84   return compat_timer_delete (timerid);
  85 # endif
  86 }
  87 #else
  88 # ifdef timer_delete_alias
  89 #  define timer_delete timer_delete_alias
  90 # endif
  91 /* The new system calls are not available.  Use the userlevel
  92    implementation.  */
  93 # include <nptl/sysdeps/pthread/timer_delete.c>
  94 #endif