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/* 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
/* 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")));
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