#ifndef WITHOUT_URING
bool anything_to_submit = true;
while (pending_reads > 0) {
- io_uring_cqe *cqes[queue_depth];
- int num_sqes = io_uring_peek_batch_cqe(&ring, cqes, queue_depth);
- if (num_sqes == 0) {
+ io_uring_cqe *cqe;
+ if (io_uring_peek_cqe(&ring, &cqe) != 0) {
if (anything_to_submit) {
// Nothing ready, so submit whatever is pending and then do a blocking wait.
- int ret = io_uring_submit(&ring);
+ int ret = io_uring_submit_and_wait(&ring, 1);
if (ret < 0) {
fprintf(stderr, "io_uring_submit(queued): %s\n", strerror(-ret));
exit(1);
}
anything_to_submit = false;
+ } else {
+ int ret = io_uring_wait_cqe(&ring, &cqe);
+ if (ret < 0) {
+ fprintf(stderr, "io_uring_wait_cqe: %s\n", strerror(-ret));
+ exit(1);
+ }
}
- int ret = io_uring_wait_cqe(&ring, &cqes[0]);
- if (ret < 0) {
- fprintf(stderr, "io_uring_wait_cqe: %s\n", strerror(-ret));
- exit(1);
- }
- num_sqes = 1;
}
- for (int sqe_idx = 0; sqe_idx < num_sqes; ++sqe_idx) {
- io_uring_cqe *cqe = cqes[sqe_idx];
+ unsigned head;
+ io_uring_for_each_cqe(&ring, head, cqe) {
PendingRead *pending = reinterpret_cast<PendingRead *>(cqe->user_data);
if (cqe->res <= 0) {
fprintf(stderr, "async read failed: %s\n", strerror(-cqe->res));
anything_to_submit = true;
}
}
+ }
- // See if there are any queued reads we can submit now.
- while (!queued_reads.empty() && pending_reads < queue_depth) {
- io_uring_sqe *sqe = io_uring_get_sqe(&ring);
- if (sqe == nullptr) {
- fprintf(stderr, "io_uring_get_sqe: %s\n", strerror(errno));
- exit(1);
- }
- QueuedRead &qr = queued_reads.front();
- submit_read_internal(sqe, qr.fd, qr.len, qr.offset, move(qr.cb));
- queued_reads.pop();
- anything_to_submit = true;
+ // See if there are any queued reads we can submit now.
+ while (!queued_reads.empty() && pending_reads < queue_depth) {
+ io_uring_sqe *sqe = io_uring_get_sqe(&ring);
+ if (sqe == nullptr) {
+ fprintf(stderr, "io_uring_get_sqe: %s\n", strerror(errno));
+ exit(1);
}
+ QueuedRead &qr = queued_reads.front();
+ submit_read_internal(sqe, qr.fd, qr.len, qr.offset, move(qr.cb));
+ queued_reads.pop();
+ anything_to_submit = true;
}
}
#endif