linuxthreads/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 #define mutex_init(m)           \
  32   __libc_maybe_call2 (pthread_mutex_init, (m, NULL), (*(int *)(m) = 0))
  33 #define mutex_lock(m)           \
  34   __libc_maybe_call2 (pthread_mutex_lock, (m), ((*(int *)(m) = 1), 0))
  35 #define mutex_trylock(m)        \
  36   __libc_maybe_call2 (pthread_mutex_trylock, (m), \
  37                       (*(int *)(m) ? 1 : ((*(int *)(m) = 1), 0)))
  38 #define mutex_unlock(m)         \
  39   __libc_maybe_call2 (pthread_mutex_unlock, (m), (*(int *)(m) = 0))
  40
  41 /* This is defined by newer gcc version unique for each module.  */
  42 extern void *__dso_handle __attribute__ ((__weak__));
  43
  44 #include <fork.h>
  45
  46 #ifdef SHARED
  47 # define thread_atfork(prepare, parent, child) \
  48    __register_atfork (prepare, parent, child, __dso_handle)
  49 #else
  50 # define thread_atfork(prepare, parent, child) \
  51    __register_atfork (prepare, parent, child,                                 \
  52                       &__dso_handle == NULL ? NULL : __dso_handle)
  53 #endif
  54
  55 /* thread specific data for glibc */
  56
  57 #include <bits/libc-tsd.h>
  58
  59 typedef int tsd_key_t[1];       /* no key data structure, libc magic does it */
  60 __libc_tsd_define (static, MALLOC)      /* declaration/common definition */
  61 #define tsd_key_create(key, destr)      ((void) (key))
  62 #define tsd_setspecific(key, data)      __libc_tsd_set (MALLOC, (data))
  63 #define tsd_getspecific(key, vptr)      ((vptr) = __libc_tsd_get (MALLOC))
  64
  65 #include <sysdeps/generic/malloc-machine.h>
  66
  67 #endif /* !defined(_MALLOC_MACHINE_H) */