sysdeps/ia64/bits/atomic.h

   1 /* Copyright (C) 2003 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <stdint.h>
  20 #include <ia64intrin.h>
  21
  22 typedef int8_t atomic8_t;
  23 typedef uint8_t uatomic8_t;
  24 typedef int_fast8_t atomic_fast8_t;
  25 typedef uint_fast8_t uatomic_fast8_t;
  26
  27 typedef int16_t atomic16_t;
  28 typedef uint16_t uatomic16_t;
  29 typedef int_fast16_t atomic_fast16_t;
  30 typedef uint_fast16_t uatomic_fast16_t;
  31
  32 typedef int32_t atomic32_t;
  33 typedef uint32_t uatomic32_t;
  34 typedef int_fast32_t atomic_fast32_t;
  35 typedef uint_fast32_t uatomic_fast32_t;
  36
  37 typedef int64_t atomic64_t;
  38 typedef uint64_t uatomic64_t;
  39 typedef int_fast64_t atomic_fast64_t;
  40 typedef uint_fast64_t uatomic_fast64_t;
  41
  42 typedef intptr_t atomicptr_t;
  43 typedef uintptr_t uatomicptr_t;
  44 typedef intmax_t atomic_max_t;
  45 typedef uintmax_t uatomic_max_t;
  46
  47
  48 #define __arch_compare_and_exchange_8_acq(mem, newval, oldval) \
  49   (abort (), 0)
  50
  51 #define __arch_compare_and_exchange_16_acq(mem, newval, oldval) \
  52   (abort (), 0)
  53
  54 #define __arch_compare_and_exchange_32_acq(mem, newval, oldval) \
  55   (!__sync_bool_compare_and_swap_si ((int *) (mem), (int) (long) (oldval), \
  56                                      (int) (long) (newval)))
  57
  58 # define __arch_compare_and_exchange_64_acq(mem, newval, oldval) \
  59   (!__sync_bool_compare_and_swap_di ((long *) (mem), (long) (oldval), \
  60                                      (long) (newval)))
  61
  62 #define __arch_compare_and_exchange_32_val_acq(mem, newval, oldval) \
  63   __sync_val_compare_and_swap_si ((int *) (mem), (int) (long) (oldval), \
  64                                   (int) (long) (newval))
  65
  66 # define __arch_compare_and_exchange_64_val_acq(mem, newval, oldval) \
  67   __sync_val_compare_and_swap_di ((long *) (mem), (long) (oldval), \
  68                                   (long) (newval))
  69
  70 # define atomic_exchange_and_add(mem, value) \
  71   ({                                                                          \
  72     __typeof (*mem) __oldval, __val;                                          \
  73     __typeof (mem) __memp = (mem);                                            \
  74     __typeof (*mem) __value = (value);                                        \
  75                                                                               \
  76     __val = *__memp;                                                          \
  77     if (sizeof (*mem) == 4)                                                   \
  78       do                                                                      \
  79         {                                                                     \
  80           __oldval = __val;                                                   \
  81           __val = __arch_compare_and_exchange_32_val_acq (__memp,             \
  82                                                           __oldval + __value, \
  83                                                           __oldval);          \
  84         }                                                                     \
  85       while (__builtin_expect (__val != __oldval, 0));                        \
  86     else if (sizeof (*mem) == 8)                                              \
  87       do                                                                      \
  88         {                                                                     \
  89           __oldval = __val;                                                   \
  90           __val = __arch_compare_and_exchange_64_val_acq (__memp,             \
  91                                                           __oldval + __value, \
  92                                                           __oldval);          \
  93         }                                                                     \
  94       while (__builtin_expect (__val != __oldval, 0));                        \
  95     else                                                                      \
  96       abort ();                                                               \
  97     __oldval + __value; })