genfio: Splitting gen_template in 2 parts
[fio.git] / io_u_queue.c
1 #include <stdlib.h>
2 #include "io_u_queue.h"
3
4 int io_u_qinit(struct io_u_queue *q, unsigned int nr)
5 {
6         q->io_us = calloc(sizeof(struct io_u *), nr);
7         if (!q->io_us)
8                 return 1;
9
10         q->nr = 0;
11         return 0;
12 }
13
14 void io_u_qexit(struct io_u_queue *q)
15 {
16         free(q->io_us);
17 }
18
19 int io_u_rinit(struct io_u_ring *ring, unsigned int nr)
20 {
21         ring->max = nr + 1;
22         if (ring->max & (ring->max - 1)) {
23                 ring->max--;
24                 ring->max |= ring->max >> 1;
25                 ring->max |= ring->max >> 2;
26                 ring->max |= ring->max >> 4;
27                 ring->max |= ring->max >> 8;
28                 ring->max |= ring->max >> 16;
29                 ring->max++;
30         }
31
32         ring->ring = calloc(sizeof(struct io_u *), ring->max);
33         if (!ring->ring)
34                 return 1;
35
36         ring->head = ring->tail = 0;
37         return 0;
38 }
39
40 void io_u_rexit(struct io_u_ring *ring)
41 {
42         free(ring->ring);
43 }