long test_read(aio_context_t ctx, int fd, long range, int afd) {
long i, n, r, j;
u_int64_t eval;
struct iocb **piocb;
struct iocb *iocb;
struct timespec tmo;
static struct io_event events[NUM_EVENTS];
static char buf[IORTX_SIZE];
n = range / IORTX_SIZE;
iocb = malloc(n * sizeof(struct iocb));
piocb = malloc(n * sizeof(struct iocb *));
if (!iocb || !piocb) {
perror("iocb alloc");
return -1;
}
for (i = 0; i < n; i++) {
piocb[i] = &iocb[i];
asyio_prep_pread(&iocb[i], fd, buf, sizeof(buf),
(n - i - 1) * IORTX_SIZE, afd);
iocb[i].aio_data = (u_int64_t) i + 1;
}
fprintf(stdout, "submitting read request ...\n");
if (io_submit(ctx, n, piocb) <= 0) {
perror("io_submit");
return -1;
}
for (i = 0; i < n;) {
fprintf(stdout, "waiting ... ");
waitasync(afd, -1);
eval = 0;
if (read(afd, &eval, sizeof(eval)) != sizeof(eval))
perror("read");
fprintf(stdout, "done! %llu\n", (unsigned long long) eval);
while (eval > 0) {
tmo.tv_sec = 0;
tmo.tv_nsec = 0;
r = io_getevents(ctx, 1, eval > NUM_EVENTS ? NUM_EVENTS: (long) eval,
events, &tmo);
if (r > 0) {
for (j = 0; j < r; j++) {
}
i += r;
eval -= r;
fprintf(stdout, "test_write got %ld/%ld results so far\n",
i, n);
}
}
}
free(iocb);
free(piocb);
return n;
}
int aio_submit_read(int fd, char * buf, int size, void * data) {
int i, r;// j;
struct iocb **piocb;
struct iocb *iocb;
iocb = malloc(sizeof(struct iocb));
piocb = malloc(sizeof(struct iocb *));
if (!iocb || !piocb) {
return -1;
}
i=0;
off_t offset = lseek( fd, 0, SEEK_CUR );
piocb[i] = &iocb[i];
asyio_prep_pread(&iocb[i], fd, buf, size,
offset, afd, data);
if ((r = io_submit(ctx, 1, piocb)) <= 0) {
return -1;
}
return r;
}
