mach/mutex-solid.c

   1 /* Copyright (C) 1994 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 Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 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 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include <lock-intern.h>
  20 #include <cthreads.h>
  21
  22 /* If cthreads is linked in, it will define these variables with values
  23    that point to its mutex functions.  */
  24 void (*_cthread_mutex_lock_routine) (struct mutex *);
  25 void (*_cthread_mutex_unlock_routine) (struct mutex *);
  26
  27 void
  28 __mutex_lock_solid (void *lock)
  29 {
  30   if (_cthread_mutex_lock_routine)
  31     (*_cthread_mutex_lock_routine) (lock);
  32   else
  33     __spin_lock_solid (lock);
  34 }
  35
  36 void
  37 __mutex_unlock_solid (void *lock)
  38 {
  39   if (_cthread_mutex_unlock_routine)
  40     (*_cthread_mutex_unlock_routine) (lock);
  41 }
  42
  43 void
  44 __mutex_init (void *lock)
  45 {
  46   /* This happens to be name space-safe because it is a macro.
  47      It invokes only spin_lock_init, which is a macro for __spin_lock_init;
  48      and cthread_queue_init, which is a macro for some simple code.  */
  49   mutex_init ((struct mutex *) lock);
  50 }