sysdeps/nptl/malloc-machine.h

   1 /* Basic platform-independent macro definitions for mutexes,
   2    thread-specific data and parameters for malloc.
   3    Copyright (C) 2003-2016 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    <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef _MALLOC_MACHINE_H
  21 #define _MALLOC_MACHINE_H
  22
  23 #undef thread_atfork_static
  24
  25 #include <atomic.h>
  26 #include <libc-lock.h>
  27
  28 __libc_lock_define (typedef, mutex_t)
  29
  30 #define mutex_init(m)           __libc_lock_init (*(m))
  31 #define mutex_lock(m)           __libc_lock_lock (*(m))
  32 #define mutex_trylock(m)        __libc_lock_trylock (*(m))
  33 #define mutex_unlock(m)         __libc_lock_unlock (*(m))
  34
  35 /* This is defined by newer gcc version unique for each module.  */
  36 extern void *__dso_handle __attribute__ ((__weak__));
  37
  38 #include <fork.h>
  39
  40 #define ATFORK_MEM static struct fork_handler atfork_mem
  41
  42 #ifdef SHARED
  43 # define thread_atfork(prepare, parent, child) \
  44   atfork_mem.prepare_handler = prepare;                                       \
  45   atfork_mem.parent_handler = parent;                                         \
  46   atfork_mem.child_handler = child;                                           \
  47   atfork_mem.dso_handle = __dso_handle;                                       \
  48   atfork_mem.refcntr = 1;                                                     \
  49   __linkin_atfork (&atfork_mem)
  50 #else
  51 # define thread_atfork(prepare, parent, child) \
  52   atfork_mem.prepare_handler = prepare;                                       \
  53   atfork_mem.parent_handler = parent;                                         \
  54   atfork_mem.child_handler = child;                                           \
  55   atfork_mem.dso_handle = &__dso_handle == NULL ? NULL : __dso_handle;        \
  56   atfork_mem.refcntr = 1;                                                     \
  57   __linkin_atfork (&atfork_mem)
  58 #endif
  59
  60 #include <sysdeps/generic/malloc-machine.h>
  61
  62 #endif /* !defined(_MALLOC_MACHINE_H) */