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[/] [c0or1k/] [trunk/] [include/] [l4/] [lib/] [spinlock.h] - Blame information for rev 2

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#ifndef __LIB_SPINLOCK_H__
#define __LIB_SPINLOCK_H__
 
#include <l4/lib/string.h>
#include <l4/generic/preempt.h>
#include INC_ARCH(irq.h)
#include INC_ARCH(mutex.h)
 
struct spinlock {
        unsigned int lock;
};
 
#define DECLARE_SPINLOCK(lockname)      \
        struct spinlock lockname = {    \
                .lock = 0,               \
        }
 
void spin_lock_record_check(void *lock_addr);
void spin_unlock_delete_check(void *lock_addr);
 
static inline void spin_lock_init(struct spinlock *s)
{
        memset(s, 0, sizeof(struct spinlock));
}
 
/*
 * - Guards from deadlock against local processes, but not local irqs.
 * - To be used for synchronising against processes on *other* cpus.
 */
static inline void spin_lock(struct spinlock *s)
{
        preempt_disable();      /* This must disable local preempt */
#if defined(CONFIG_SMP)
 
#if defined (CONFIG_DEBUG_SPINLOCKS)
        spin_lock_record_check(s);
#endif
        __spin_lock(&s->lock);
#endif
}
 
static inline void spin_unlock(struct spinlock *s)
{
#if defined(CONFIG_SMP)
 
#if defined (CONFIG_DEBUG_SPINLOCKS)
        spin_unlock_delete_check(s);
#endif
        __spin_unlock(&s->lock);
#endif
        preempt_enable();
}
 
/*
 * - Guards from deadlock against local processes *and* local irqs.
 * - To be used for synchronising against processes and irqs
 *   on other cpus.
 */
static inline void spin_lock_irq(struct spinlock *s,
                                 unsigned long *state)
{
        irq_local_disable_save(state);
#if defined(CONFIG_SMP)
#if defined (CONFIG_DEBUG_SPINLOCKS)
        spin_lock_record_check(s);
#endif
 
        __spin_lock(&s->lock);
#endif
}
 
static inline void spin_unlock_irq(struct spinlock *s,
                                   unsigned long state)
{
#if defined(CONFIG_SMP)
 
#if defined (CONFIG_DEBUG_SPINLOCKS)
        spin_unlock_delete_check(s);
#endif
 
        __spin_unlock(&s->lock);
#endif
        irq_local_restore(state);
}
#endif /* __LIB__SPINLOCK_H__ */

Line No.	Rev	Author	Line
1	2	drasko	`#ifndef __LIB_SPINLOCK_H__`
2			`#define __LIB_SPINLOCK_H__`
3
4			`#include <l4/lib/string.h>`
5			`#include <l4/generic/preempt.h>`
6			`#include INC_ARCH(irq.h)`
7			`#include INC_ARCH(mutex.h)`
8
9			`struct spinlock {`
10			`unsigned int lock;`
11			`};`
12
13			`#define DECLARE_SPINLOCK(lockname) \`
14			`struct spinlock lockname = { \`
15			`.lock = 0, \`
16			`}`
17
18			`void spin_lock_record_check(void *lock_addr);`
19			`void spin_unlock_delete_check(void *lock_addr);`
20
21			`static inline void spin_lock_init(struct spinlock *s)`
22			`{`
23			`memset(s, 0, sizeof(struct spinlock));`
24			`}`
25
26			`/*`
27			`* - Guards from deadlock against local processes, but not local irqs.`
28			`* - To be used for synchronising against processes on other cpus.`
29			`*/`
30			`static inline void spin_lock(struct spinlock *s)`
31			`{`
32			`preempt_disable(); /* This must disable local preempt */`
33			`#if defined(CONFIG_SMP)`
34
35			`#if defined (CONFIG_DEBUG_SPINLOCKS)`
36			`spin_lock_record_check(s);`
37			`#endif`
38			`__spin_lock(&s->lock);`
39			`#endif`
40			`}`
41
42			`static inline void spin_unlock(struct spinlock *s)`
43			`{`
44			`#if defined(CONFIG_SMP)`
45
46			`#if defined (CONFIG_DEBUG_SPINLOCKS)`
47			`spin_unlock_delete_check(s);`
48			`#endif`
49			`__spin_unlock(&s->lock);`
50			`#endif`
51			`preempt_enable();`
52			`}`
53
54			`/*`
55			`* - Guards from deadlock against local processes and local irqs.`
56			`* - To be used for synchronising against processes and irqs`
57			`* on other cpus.`
58			`*/`
59			`static inline void spin_lock_irq(struct spinlock *s,`
60			`unsigned long *state)`
61			`{`
62			`irq_local_disable_save(state);`
63			`#if defined(CONFIG_SMP)`
64			`#if defined (CONFIG_DEBUG_SPINLOCKS)`
65			`spin_lock_record_check(s);`
66			`#endif`
67
68			`__spin_lock(&s->lock);`
69			`#endif`
70			`}`
71
72			`static inline void spin_unlock_irq(struct spinlock *s,`
73			`unsigned long state)`
74			`{`
75			`#if defined(CONFIG_SMP)`
76
77			`#if defined (CONFIG_DEBUG_SPINLOCKS)`
78			`spin_unlock_delete_check(s);`
79			`#endif`
80
81			`__spin_unlock(&s->lock);`
82			`#endif`
83			`irq_local_restore(state);`
84			`}`
85			`#endif /* __LIB__SPINLOCK_H__ */`

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[/] [c0or1k/] [trunk/] [include/] [l4/] [lib/] [spinlock.h] - Blame information for rev 2