sysdeps/generic/malloc-machine.h

   1 /* Basic platform-independent macro definitions for mutexes,
   2    thread-specific data and parameters for malloc.
   3    Copyright (C) 2003-2022 Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <https://www.gnu.org/licenses/>.  */
  19
  20 #ifndef _GENERIC_MALLOC_MACHINE_H
  21 #define _GENERIC_MALLOC_MACHINE_H
  22
  23 #include <atomic.h>
  24
  25 #ifndef atomic_full_barrier
  26 # define atomic_full_barrier() __asm ("" ::: "memory")
  27 #endif
  28
  29 #ifndef atomic_read_barrier
  30 # define atomic_read_barrier() atomic_full_barrier ()
  31 #endif
  32
  33 #ifndef atomic_write_barrier
  34 # define atomic_write_barrier() atomic_full_barrier ()
  35 #endif
  36
  37 #ifndef DEFAULT_TOP_PAD
  38 # define DEFAULT_TOP_PAD 131072
  39 #endif
  40
  41 #endif /* !defined(_GENERIC_MALLOC_MACHINE_H) */