libc/sysdeps/linux/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, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <stdint.h>
  19 #include <ia64intrin.h>
  20
  21 typedef int8_t atomic8_t;
  22 typedef uint8_t uatomic8_t;
  23 typedef int_fast8_t atomic_fast8_t;
  24 typedef uint_fast8_t uatomic_fast8_t;
  25
  26 typedef int16_t atomic16_t;
  27 typedef uint16_t uatomic16_t;
  28 typedef int_fast16_t atomic_fast16_t;
  29 typedef uint_fast16_t uatomic_fast16_t;
  30
  31 typedef int32_t atomic32_t;
  32 typedef uint32_t uatomic32_t;
  33 typedef int_fast32_t atomic_fast32_t;
  34 typedef uint_fast32_t uatomic_fast32_t;
  35
  36 typedef int64_t atomic64_t;
  37 typedef uint64_t uatomic64_t;
  38 typedef int_fast64_t atomic_fast64_t;
  39 typedef uint_fast64_t uatomic_fast64_t;
  40
  41 typedef intptr_t atomicptr_t;
  42 typedef uintptr_t uatomicptr_t;
  43 typedef intmax_t atomic_max_t;
  44 typedef uintmax_t uatomic_max_t;
  45
  46
  47 #define __arch_compare_and_exchange_bool_8_acq(mem, newval, oldval) \
  48   (abort (), 0)
  49
  50 #define __arch_compare_and_exchange_bool_16_acq(mem, newval, oldval) \
  51   (abort (), 0)
  52
  53 #define __arch_compare_and_exchange_bool_32_acq(mem, newval, oldval) \
  54   (!__sync_bool_compare_and_swap ((mem), (int) (long) (oldval), \
  55                                   (int) (long) (newval)))
  56
  57 #define __arch_compare_and_exchange_bool_64_acq(mem, newval, oldval) \
  58   (!__sync_bool_compare_and_swap ((mem), (long) (oldval), \
  59                                   (long) (newval)))
  60
  61 #define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \
  62   (abort (), (__typeof (*mem)) 0)
  63
  64 #define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \
  65   (abort (), (__typeof (*mem)) 0)
  66
  67 #define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \
  68   __sync_val_compare_and_swap ((mem), (int) (long) (oldval), \
  69                                (int) (long) (newval))
  70
  71 #define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
  72   __sync_val_compare_and_swap ((mem), (long) (oldval), (long) (newval))
  73
  74 /* Atomically store newval and return the old value.  */
  75 #define atomic_exchange_acq(mem, value) \
  76   __sync_lock_test_and_set (mem, value)
  77
  78 #define atomic_exchange_rel(mem, value) \
  79   (__sync_synchronize (), __sync_lock_test_and_set (mem, value))
  80
  81 #define atomic_exchange_and_add(mem, value) \
  82   ({ __typeof (*mem) __result;                                                \
  83      __result = __sync_fetch_and_add ((mem), (int) (value));                  \
  84      __result; })
  85
  86 #define atomic_decrement_if_positive(mem) \
  87   ({ __typeof (*mem) __oldval, __val;                                         \
  88      __typeof (mem) __memp = (mem);                                           \
  89                                                                               \
  90      __val = (*__memp);                                                       \
  91      do                                                                       \
  92        {                                                                      \
  93          __oldval = __val;                                                    \
  94          if (__builtin_expect (__val <= 0, 0))                                \
  95            break;                                                             \
  96          __val = atomic_compare_and_exchange_val_acq (__memp,   __oldval - 1, \
  97                                                       __oldval);              \
  98        }                                                                      \
  99      while (__builtin_expect (__val != __oldval, 0));                         \
 100      __oldval; })
 101
 102 #define atomic_bit_test_set(mem, bit) \
 103   ({ __typeof (*mem) __oldval, __val;                                         \
 104      __typeof (mem) __memp = (mem);                                           \
 105      __typeof (*mem) __mask = ((__typeof (*mem)) 1 << (bit));                 \
 106                                                                               \
 107      __val = (*__memp);                                                       \
 108      do                                                                       \
 109        {                                                                      \
 110          __oldval = __val;                                                    \
 111          __val = atomic_compare_and_exchange_val_acq (__memp,                 \
 112                                                       __oldval | __mask,      \
 113                                                       __oldval);              \
 114        }                                                                      \
 115      while (__builtin_expect (__val != __oldval, 0));                         \
 116      __oldval & __mask; })
 117
 118 #define atomic_full_barrier() __sync_synchronize ()