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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Generic implementation of 64-bit atomics using spinlocks,
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* useful on processors that don't have 64-bit atomic instructions.
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*
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* Copyright © 2009 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
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*/
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#ifndef _ASM_GENERIC_ATOMIC64_H
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#define _ASM_GENERIC_ATOMIC64_H
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#include <linux/types.h>
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typedef struct {
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long long counter;
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} atomic64_t;
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#define ATOMIC64_INIT(i) { (i) }
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extern long long atomic64_read(const atomic64_t *v);
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extern void atomic64_set(atomic64_t *v, long long i);
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#define atomic64_set_release(v, i) atomic64_set((v), (i))
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#define ATOMIC64_OP(op) \
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extern void atomic64_##op(long long a, atomic64_t *v);
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#define ATOMIC64_OP_RETURN(op) \
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extern long long atomic64_##op##_return(long long a, atomic64_t *v);
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#define ATOMIC64_FETCH_OP(op) \
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extern long long atomic64_fetch_##op(long long a, atomic64_t *v);
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#define ATOMIC64_OPS(op) ATOMIC64_OP(op) ATOMIC64_OP_RETURN(op) ATOMIC64_FETCH_OP(op)
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ATOMIC64_OPS(add)
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ATOMIC64_OPS(sub)
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#undef ATOMIC64_OPS
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#define ATOMIC64_OPS(op) ATOMIC64_OP(op) ATOMIC64_FETCH_OP(op)
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ATOMIC64_OPS(and)
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ATOMIC64_OPS(or)
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ATOMIC64_OPS(xor)
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#undef ATOMIC64_OPS
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#undef ATOMIC64_FETCH_OP
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#undef ATOMIC64_OP_RETURN
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#undef ATOMIC64_OP
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extern long long atomic64_dec_if_positive(atomic64_t *v);
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#define atomic64_dec_if_positive atomic64_dec_if_positive
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extern long long atomic64_cmpxchg(atomic64_t *v, long long o, long long n);
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extern long long atomic64_xchg(atomic64_t *v, long long new);
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extern long long atomic64_fetch_add_unless(atomic64_t *v, long long a, long long u);
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#define atomic64_fetch_add_unless atomic64_fetch_add_unless
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#endif /* _ASM_GENERIC_ATOMIC64_H */
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