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Change API to provide io_uring struct abstraction

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This is cleaner than having the app juggle an SQ and CQ ring,
just wrap them in struct io_uring and have the API always take
that. This means the app doesn't need to worry about the different
types of rings, and that we only need to pass in one argument
for setup/teardown.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe
2019-01-08 15:31:35 -07:00
parent f47f24cea7
commit 7f7a66e385
3 changed files with 34 additions and 28 deletions
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22
src/liburing.h
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@@ -34,6 +34,11 @@ struct io_uring_cq {
size_t ring_sz;
};
struct io_uring {
struct io_uring_sq sq;
struct io_uring_cq cq;
};
/*
* System calls
*/
@@ -46,20 +51,19 @@ extern int io_uring_enter(unsigned fd, unsigned to_submit,
* Library interface
*/
extern int io_uring_queue_init(unsigned entries, struct io_uring_params *p,
struct iovec *iovecs, struct io_uring_sq *sq, struct io_uring_cq *cq);
extern void io_uring_queue_exit(int fd, struct io_uring_sq *sq,
struct io_uring_cq *cq);
extern int io_uring_get_completion(int fd, struct io_uring_cq *cq,
struct iovec *iovecs, struct io_uring *ring);
extern void io_uring_queue_exit(int fd, struct io_uring *ring);
extern int io_uring_get_completion(int fd, struct io_uring *ring,
struct io_uring_event **ev_ptr);
extern int io_uring_wait_completion(int fd, struct io_uring_cq *cq,
extern int io_uring_wait_completion(int fd, struct io_uring *ring,
struct io_uring_event **ev_ptr);
extern int io_uring_submit(int fd, struct io_uring_sq *sq);
extern struct io_uring_iocb *io_uring_get_iocb(struct io_uring_sq *sq);
extern int io_uring_submit(int fd, struct io_uring *ring);
extern struct io_uring_iocb *io_uring_get_iocb(struct io_uring *ring);
static inline struct io_uring_iocb *
io_uring_iocb_from_ev(struct io_uring_sq *sq, struct io_uring_event *ev)
io_uring_iocb_from_ev(struct io_uring *ring, struct io_uring_event *ev)
{
return &sq->iocbs[ev->index];
return &ring->sq.iocbs[ev->index];
}
#endif