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Diffstat (limited to 'ports/sysdeps/tile/bits/atomic.h')
| -rw-r--r-- | ports/sysdeps/tile/bits/atomic.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/ports/sysdeps/tile/bits/atomic.h b/ports/sysdeps/tile/bits/atomic.h new file mode 100644 index 0000000000..cb96004fc8 --- /dev/null +++ b/ports/sysdeps/tile/bits/atomic.h @@ -0,0 +1,86 @@ +/* Copyright (C) 2011 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <http://www.gnu.org/licenses/>. */ + +/* The sub-architecture headers provide definitions for these macros + that work for "int" and "long" size values only: + + atomic_compare_and_exchange_val_acq() + atomic_exchange_acq() + atomic_exchange_and_add() + atomic_and_val() + atomic_or_val() + atomic_decrement_if_positive() [tilegx only] + + Here we provide generic definitions true for all Tilera chips. */ + +#include <stdint.h> +#include <features.h> + +typedef int32_t atomic32_t; +typedef uint32_t uatomic32_t; +typedef int_fast32_t atomic_fast32_t; +typedef uint_fast32_t uatomic_fast32_t; + +typedef int64_t atomic64_t; +typedef uint64_t uatomic64_t; +typedef int_fast64_t atomic_fast64_t; +typedef uint_fast64_t uatomic_fast64_t; + +typedef intptr_t atomicptr_t; +typedef uintptr_t uatomicptr_t; +typedef intmax_t atomic_max_t; +typedef uintmax_t uatomic_max_t; + +/* Barrier macro. */ +#define atomic_full_barrier() __sync_synchronize() + +/* APIs with "release" semantics. */ +#define atomic_compare_and_exchange_val_rel(mem, n, o) \ + ({ \ + atomic_full_barrier (); \ + atomic_compare_and_exchange_val_acq ((mem), (n), (o)); \ + }) +#define atomic_compare_and_exchange_bool_rel(mem, n, o) \ + ({ \ + atomic_full_barrier (); \ + atomic_compare_and_exchange_bool_acq ((mem), (n), (o)); \ + }) +#define atomic_exchange_rel(mem, n) \ + ({ \ + atomic_full_barrier (); \ + atomic_exchange_acq ((mem), (n)); \ + }) + +/* Various macros that should just be synonyms. */ +#define catomic_exchange_and_add atomic_exchange_and_add +#define atomic_and(mem, mask) ((void) atomic_and_val ((mem), (mask))) +#define catomic_and atomic_and +#define atomic_or(mem, mask) ((void) atomic_or_val ((mem), (mask))) +#define catomic_or atomic_or + +/* atomic_bit_test_set in terms of atomic_or_val. */ +#define atomic_bit_test_set(mem, bit) \ + ({ __typeof (*(mem)) __att0_mask = ((__typeof (*(mem))) 1 << (bit)); \ + atomic_or_val ((mem), __att0_mask) & __att0_mask; }) + +/* + * This non-existent symbol is called for unsupporrted sizes, + * indicating a bug in the caller. + */ +extern int __atomic_error_bad_argument_size(void) + __attribute__ ((warning ("bad sizeof atomic argument"))); |