mach/spin-solid.c

   1 /* Copyright (C) 1994-2021 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 <spin-lock.h>
  19 #include <mach/mach_traps.h>
  20
  21 void
  22 __spin_lock_solid (spin_lock_t *lock)
  23 {
  24   while (__spin_lock_locked (lock) || ! __spin_try_lock (lock))
  25     /* Yield to another thread (system call).  */
  26     __swtch_pri (0);
  27 }
  28 weak_alias (__spin_lock_solid, spin_lock_solid);
  29 libc_hidden_def (__spin_lock_solid)