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11 * The above copyright notice and this permission notice (including the next
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25 * u_vector is a vector based queue for storing arbitrary
26 * sized arrays of objects without using a linked list.
34 #include "util/macros.h"
36 /* TODO - move to u_math.h - name it better etc */
37 static inline uint32_t
38 u_align_u32(uint32_t v, uint32_t a)
40 assert(a != 0 && a == (a & -((int32_t) a)));
41 return (v + a - 1) & ~(a - 1);
47 uint32_t element_size;
52 int u_vector_init(struct u_vector *queue, uint32_t element_size, uint32_t size);
53 void *u_vector_add(struct u_vector *queue);
54 void *u_vector_remove(struct u_vector *queue);
57 u_vector_length(struct u_vector *queue)
59 return (queue->head - queue->tail) / queue->element_size;
63 u_vector_head(struct u_vector *vector)
65 assert(vector->tail < vector->head);
66 return (void *)((char *)vector->data +
67 ((vector->head - vector->element_size) &
72 u_vector_tail(struct u_vector *vector)
74 return (void *)((char *)vector->data + (vector->tail & (vector->size - 1)));
78 u_vector_finish(struct u_vector *queue)
83 #define u_vector_foreach(elem, queue) \
84 STATIC_ASSERT(__builtin_types_compatible_p(__typeof__(queue), struct u_vector *)); \
85 for (uint32_t __u_vector_offset = (queue)->tail; \
86 elem = (void *)((char *)(queue)->data + (__u_vector_offset & ((queue)->size - 1))), __u_vector_offset < (queue)->head; \
87 __u_vector_offset += (queue)->element_size)