12 #define SMP_CACHE_BYTES 64
13 #define cache_line_size() SMP_CACHE_BYTES
14 #define ____cacheline_aligned_in_smp __attribute__ ((aligned (SMP_CACHE_BYTES)))
15 #define unlikely(x) (__builtin_expect(!!(x), 0))
16 #define likely(x) (__builtin_expect(!!(x), 1))
17 #define ALIGN(x, a) (((x) + (a) - 1) / (a) * (a))
18 typedef pthread_spinlock_t spinlock_t;
21 static void *kmalloc(unsigned size, gfp_t gfp)
23 return memalign(64, size);
26 static void *kzalloc(unsigned size, gfp_t gfp)
28 void *p = memalign(64, size);
36 static void kfree(void *p)
42 static void spin_lock_init(spinlock_t *lock)
44 int r = pthread_spin_init(lock, 0);
48 static void spin_lock(spinlock_t *lock)
50 int ret = pthread_spin_lock(lock);
54 static void spin_unlock(spinlock_t *lock)
56 int ret = pthread_spin_unlock(lock);
60 static void spin_lock_bh(spinlock_t *lock)
65 static void spin_unlock_bh(spinlock_t *lock)
70 static void spin_lock_irq(spinlock_t *lock)
75 static void spin_unlock_irq(spinlock_t *lock)
80 static void spin_lock_irqsave(spinlock_t *lock, unsigned long f)
85 static void spin_unlock_irqrestore(spinlock_t *lock, unsigned long f)
90 #include "../../../include/linux/ptr_ring.h"
92 static unsigned long long headcnt, tailcnt;
93 static struct ptr_ring array ____cacheline_aligned_in_smp;
95 /* implemented by ring */
98 int ret = ptr_ring_init(&array, ring_size, 0);
103 int add_inbuf(unsigned len, void *buf, void *datap)
107 ret = __ptr_ring_produce(&array, buf);
117 * ptr_ring API provides no way for producer to find out whether a given
118 * buffer was consumed. Our tests merely require that a successful get_buf
119 * implies that add_inbuf succeed in the past, and that add_inbuf will succeed,
120 * fake it accordingly.
122 void *get_buf(unsigned *lenp, void **bufp)
126 if (tailcnt == headcnt || __ptr_ring_full(&array))
138 return (tailcnt == headcnt || __ptr_ring_full(&array));
151 void kick_available(void)
169 return !__ptr_ring_peek(&array);
172 bool use_buf(unsigned *lenp, void **bufp)
176 ptr = __ptr_ring_consume(&array);