mirror of
https://github.com/checkpoint-restore/criu
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7ce8f56be2
This patch only adds the support but does not enable it for building. Reviewed-by: Alice Frosi <alice@linux.vnet.ibm.com> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Reviewed-by: Dmitry Safonov <dsafonov@virtuozzo.com> Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
68 lines
1.4 KiB
C
68 lines
1.4 KiB
C
#ifndef __ARCH_S390_ATOMIC__
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#define __ARCH_S390_ATOMIC__
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#include "common/arch/s390/asm/atomic_ops.h"
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#include "common/compiler.h"
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#define ATOMIC_INIT(i) { (i) }
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typedef struct {
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int counter;
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} atomic_t;
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static inline int atomic_read(const atomic_t *v)
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{
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int c;
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asm volatile(
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" l %0,%1\n"
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: "=d" (c) : "Q" (v->counter));
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return c;
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}
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static inline void atomic_set(atomic_t *v, int i)
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{
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asm volatile(
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" st %1,%0\n"
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: "=Q" (v->counter) : "d" (i));
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}
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static inline int atomic_add_return(int i, atomic_t *v)
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{
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return __atomic_add_barrier(i, &v->counter) + i;
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}
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static inline void atomic_add(int i, atomic_t *v)
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{
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__atomic_add(i, &v->counter);
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}
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#define atomic_inc(_v) atomic_add(1, _v)
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#define atomic_inc_return(_v) atomic_add_return(1, _v)
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#define atomic_sub(_i, _v) atomic_add(-(int)(_i), _v)
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#define atomic_sub_return(_i, _v) atomic_add_return(-(int)(_i), _v)
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#define atomic_dec(_v) atomic_sub(1, _v)
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#define atomic_dec_return(_v) atomic_sub_return(1, _v)
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#define atomic_dec_and_test(_v) (atomic_sub_return(1, _v) == 0)
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#define ATOMIC_OPS(op) \
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static inline void atomic_##op(int i, atomic_t *v) \
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{ \
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__atomic_##op(i, &v->counter); \
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} \
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ATOMIC_OPS(and)
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ATOMIC_OPS(or)
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ATOMIC_OPS(xor)
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#undef ATOMIC_OPS
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static inline int atomic_cmpxchg(atomic_t *v, int old, int new)
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{
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return __atomic_cmpxchg(&v->counter, old, new);
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}
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#endif /* __ARCH_S390_ATOMIC__ */
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