sysdeps/unix/sysv/linux/hppa/linuxthreads/malloc-machine.h

   1 /* HP-PARISC macro definitions for mutexes, thread-specific data
   2    and parameters for malloc.
   3    Copyright (C) 2003 Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5    Contributed by Carlos O'Donell <carlos@baldric.uwo.ca>, 2003.
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Lesser General Public
   9    License as published by the Free Software Foundation; either
  10    version 2.1 of the License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with the GNU C Library; if not, write to the Free
  19    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  20    02111-1307 USA.  */
  21
  22 #ifndef _MALLOC_MACHINE_H
  23 #define _MALLOC_MACHINE_H
  24
  25 #undef thread_atfork_static
  26
  27 #include <atomic.h>
  28 #include <bits/libc-lock.h>
  29
  30 __libc_lock_define (typedef, mutex_t)
  31
  32 /* Since our lock structure does not tolerate being initialized to zero, we must
  33    modify the standard function calls made by malloc */
  34 #  define mutex_init(m)         \
  35         __libc_maybe_call (__pthread_mutex_init, (m, NULL), \
  36                 (((m)->__m_lock.__spinlock = __LT_SPINLOCK_INIT),(*(int *)(m))) )
  37 #  define mutex_lock(m)         \
  38         __libc_maybe_call (__pthread_mutex_lock, (m), \
  39                         (__load_and_clear(&((m)->__m_lock.__spinlock)), 0))
  40 #  define mutex_trylock(m)      \
  41         __libc_maybe_call (__pthread_mutex_trylock, (m), \
  42                         (*(int *)(m) ? 1 : (__load_and_clear(&((m)->__m_lock.__spinlock)), 0)))
  43 #  define mutex_unlock(m)       \
  44         __libc_maybe_call (__pthread_mutex_unlock, (m), \
  45                         (((m)->__m_lock.__spinlock = __LT_SPINLOCK_INIT), (*(int *)(m))) )
  46
  47 /* This is defined by newer gcc version unique for each module.  */
  48 extern void *__dso_handle __attribute__ ((__weak__));
  49
  50 #include <fork.h>
  51
  52 #ifdef SHARED
  53 # define thread_atfork(prepare, parent, child) \
  54    __register_atfork (prepare, parent, child, __dso_handle)
  55 #else
  56 # define thread_atfork(prepare, parent, child) \
  57    __register_atfork (prepare, parent, child,                                 \
  58                       &__dso_handle == NULL ? NULL : __dso_handle)
  59 #endif
  60
  61 /* thread specific data for glibc */
  62
  63 #include <bits/libc-tsd.h>
  64
  65 typedef int tsd_key_t[1];       /* no key data structure, libc magic does it */
  66 __libc_tsd_define (static, void *, MALLOC)      /* declaration/common definition */
  67 #define tsd_key_create(key, destr)      ((void) (key))
  68 #define tsd_setspecific(key, data)      __libc_tsd_set (void *, MALLOC, (data))
  69 #define tsd_getspecific(key, vptr)      ((vptr) = __libc_tsd_get (void *, MALLOC))
  70
  71 #include <sysdeps/generic/malloc-machine.h>
  72
  73 #endif /* !defined(_MALLOC_MACHINE_H) */