Linux Kernel  3.7.1
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atomic-irq.h
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1 #ifndef __ASM_SH_ATOMIC_IRQ_H
2 #define __ASM_SH_ATOMIC_IRQ_H
3 
4 #include <linux/irqflags.h>
5 
6 /*
7  * To get proper branch prediction for the main line, we must branch
8  * forward to code at the end of this object's .text section, then
9  * branch back to restart the operation.
10  */
11 static inline void atomic_add(int i, atomic_t *v)
12 {
13  unsigned long flags;
14 
15  raw_local_irq_save(flags);
16  v->counter += i;
17  raw_local_irq_restore(flags);
18 }
19 
20 static inline void atomic_sub(int i, atomic_t *v)
21 {
22  unsigned long flags;
23 
24  raw_local_irq_save(flags);
25  v->counter -= i;
26  raw_local_irq_restore(flags);
27 }
28 
29 static inline int atomic_add_return(int i, atomic_t *v)
30 {
31  unsigned long temp, flags;
32 
33  raw_local_irq_save(flags);
34  temp = v->counter;
35  temp += i;
36  v->counter = temp;
37  raw_local_irq_restore(flags);
38 
39  return temp;
40 }
41 
42 static inline int atomic_sub_return(int i, atomic_t *v)
43 {
44  unsigned long temp, flags;
45 
46  raw_local_irq_save(flags);
47  temp = v->counter;
48  temp -= i;
49  v->counter = temp;
50  raw_local_irq_restore(flags);
51 
52  return temp;
53 }
54 
55 static inline void atomic_clear_mask(unsigned int mask, atomic_t *v)
56 {
57  unsigned long flags;
58 
59  raw_local_irq_save(flags);
60  v->counter &= ~mask;
61  raw_local_irq_restore(flags);
62 }
63 
64 static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
65 {
66  unsigned long flags;
67 
68  raw_local_irq_save(flags);
69  v->counter |= mask;
70  raw_local_irq_restore(flags);
71 }
72 
73 #endif /* __ASM_SH_ATOMIC_IRQ_H */