nptl/sysdeps/pthread/malloc-machine.h

   1 /* Basic platform-independent macro definitions for mutexes,
   2    thread-specific data and parameters for malloc.
   3    Copyright (C) 2003 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, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #ifndef _MALLOC_MACHINE_H
  22 #define _MALLOC_MACHINE_H
  23
  24 #undef thread_atfork_static
  25
  26 #include <atomic.h>
  27 #include <bits/libc-lock.h>
  28
  29 __libc_lock_define (typedef, mutex_t)
  30
  31 /* Assume NPTL.  */
  32
  33 #define mutex_init(m)           __libc_lock_init (*(m))
  34 #define mutex_lock(m)           __libc_lock_lock (*(m))
  35 #define mutex_trylock(m)        __libc_lock_trylock (*(m))
  36 #define mutex_unlock(m)         __libc_lock_unlock (*(m))
  37
  38 /* This is defined by newer gcc version unique for each module.  */
  39 extern void *__dso_handle __attribute__ ((__weak__));
  40
  41 #include <fork.h>
  42
  43 #ifdef SHARED
  44 # define thread_atfork(prepare, parent, child) \
  45    __register_atfork (prepare, parent, child, __dso_handle)
  46 #else
  47 # define thread_atfork(prepare, parent, child) \
  48    __register_atfork (prepare, parent, child,                                 \
  49                       &__dso_handle == NULL ? NULL : __dso_handle)
  50 #endif
  51
  52 /* thread specific data for glibc */
  53
  54 #include <bits/libc-tsd.h>
  55
  56 typedef int tsd_key_t[1];       /* no key data structure, libc magic does it */
  57 __libc_tsd_define (static, MALLOC)      /* declaration/common definition */
  58 #define tsd_key_create(key, destr)      ((void) (key))
  59 #define tsd_setspecific(key, data)      __libc_tsd_set (MALLOC, (data))
  60 #define tsd_getspecific(key, vptr)      ((vptr) = __libc_tsd_get (MALLOC))
  61
  62 #include <sysdeps/generic/malloc-machine.h>
  63
  64 #endif /* !defined(_MALLOC_MACHINE_H) */