Initial commit

Signed-off-by: Jens Axboe <axboe@kernel.dk>

src/liburing.h

@@ -0,0 +1,57 @@
+#ifndef LIB_URING_H
+#define LIB_URING_H
+
+#include <sys/uio.h>
+#include "io_uring.h"
+
+/*
+ * Library interface to io_uring
+ */
+struct io_uring_sq {
+	unsigned *khead;
+	unsigned *ktail;
+	unsigned *kring_mask;
+	unsigned *kring_entries;
+	unsigned *kflags;
+	unsigned *kdropped;
+	unsigned *array;
+	struct io_uring_iocb *iocbs;
+
+	unsigned iocb_head;
+	unsigned iocb_tail;
+
+	size_t ring_sz;
+};
+
+struct io_uring_cq {
+	unsigned *khead;
+	unsigned *ktail;
+	unsigned *kring_mask;
+	unsigned *kring_entries;
+	unsigned *koverflow;
+	struct io_uring_event *events;
+
+	size_t ring_sz;
+};
+
+/*
+ * System calls
+ */
+extern int io_uring_setup(unsigned entries, struct iovec *iovecs,
+	struct io_uring_params *p);
+extern int io_uring_enter(unsigned fd, unsigned to_submit,
+	unsigned min_complete, unsigned flags);
+
+/*
+ * 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 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);
+
+#endif