io_setup(3)                Library Functions Manual                io_setup(3)

NAME
       io_setup - create an asynchronous I/O context

LIBRARY
       Asynchronous I/O library (libaio, -laio)

SYNOPSIS
       #include <libaio.h>

       long io_setup(unsigned int n, io_context_t *ctx_idp);

DESCRIPTION
       io_setup() creates an asynchronous I/O context suitable for
       concurrently processing n operations.

RETURN VALUE
       On success, io_setup() returns 0.  On error, a negative error code is
       returned to indicate the error.

ERRORS
       See io_setup(2).

STANDARDS
       libaio.

HISTORY
       libaio.

SEE ALSO
       io_setup(2), io(3), aio(7)

Linux man-pages 6.18              2026-04-11                       io_setup(3)