1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
/* atomic.h: These really suck for now.
*
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
*/
#ifndef __ARCH_SPARC_ATOMIC__
#define __ARCH_SPARC_ATOMIC__
#ifdef __SMP__
#include <asm/smp.h>
#include <asm/smp_lock.h>
#endif
typedef int atomic_t;
static __inline__ void atomic_add(atomic_t i, atomic_t *v)
{
unsigned long flags;
save_flags(flags); cli();
*v += i;
restore_flags(flags);
}
static __inline__ void atomic_sub(atomic_t i, atomic_t *v)
{
unsigned long flags;
save_flags(flags); cli();
*v -= i;
restore_flags(flags);
}
static __inline__ int atomic_sub_and_test(atomic_t i, atomic_t *v)
{
unsigned long flags, result;
save_flags(flags); cli();
*v -= i;
result = (*v == 0);
restore_flags(flags);
return result;
}
static __inline__ void atomic_inc(atomic_t *v)
{
atomic_add(1, v);
}
static __inline__ void atomic_dec(atomic_t *v)
{
atomic_sub(1, v);
}
static __inline__ int atomic_dec_and_test(atomic_t *v)
{
return atomic_sub_and_test(1, v);
}
#endif /* !(__ARCH_SPARC_ATOMIC__) */
|
