cpp/liburing
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Add sqe prep helpers

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Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe
2019-01-17 18:12:22 -07:00
parent 980cc0f025
commit 5789a6351a
5 changed files with 67 additions and 49 deletions
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49
src/liburing.h
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@@ -62,4 +62,53 @@ extern int io_uring_wait_completion(struct io_uring *ring,
extern int io_uring_submit(struct io_uring *ring);
extern struct io_uring_sqe *io_uring_get_sqe(struct io_uring *ring);
/*
* Command prep helpers
*/
static inline void io_uring_sqe_set_data(struct io_uring_sqe *sqe, void *data)
{
sqe->user_data = (unsigned long) data;
}
static inline void io_uring_prep_readv(struct io_uring_sqe *sqe, int fd,
struct iovec *iovecs, unsigned nr_vecs,
off_t offset)
{
memset(sqe, 0, sizeof(*sqe));
sqe->opcode = IORING_OP_READV;
sqe->fd = fd;
sqe->off = offset;
sqe->addr = (unsigned long) iovecs;
sqe->len = 1;
}
static inline void io_uring_prep_writev(struct io_uring_sqe *sqe, int fd,
struct iovec *iovecs, unsigned nr_vecs,
off_t offset)
{
memset(sqe, 0, sizeof(*sqe));
sqe->opcode = IORING_OP_WRITEV;
sqe->fd = fd;
sqe->off = offset;
sqe->addr = (unsigned long) iovecs;
sqe->len = 1;
}
static inline void io_uring_prep_poll(struct io_uring_sqe *sqe, int fd,
short poll_mask)
{
memset(sqe, 0, sizeof(*sqe));
sqe->opcode = IORING_OP_POLL;
sqe->fd = fd;
sqe->poll_events = poll_mask;
}
static inline void io_uring_prep_poll_cancel(struct io_uring_sqe *sqe,
void *user_data)
{
memset(sqe, 0, sizeof(*sqe));
sqe->opcode = IORING_OP_POLL_CANCEL;
sqe->addr = (unsigned long) user_data;
}
#endif