jammy (3) io_uring_queue_init.3.gz

NAME

       io_uring_queue_init - setup io_uring submission and completion queues

SYNOPSIS

       #include <liburing.h>

       int io_uring_queue_init(unsigned entries, struct io_uring *ring,
                               unsigned flags);

DESCRIPTION

       The  io_uring_queue_init()  function executes the io_uring_setup syscall to initialize the submission and
       completion queues in the kernel with at least entries entries and then maps the resulting file descriptor
       to memory shared between the application and the kernel.

       On  success  io_uring_queue_init()  returns  0  and  ring  will point to the shared memory containing the
       io_uring queues. On failure -errno is returned.

       flags will be passed through to the io_uring_setup syscall (see io_uring_setup(2)).

       On  success,  the  resources  held  by  ring  should  be   released   via   a   corresponding   call   to
       io_uring_queue_exit(3).

RETURN VALUE

       io_uring_queue_init(3) returns 0 on success and -errno on failure.

SEE ALSO

       io_uring_setup(2), mmap(2), io_uring_queue_exit(3)