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IO_DESTROY(2) Linux Programmer's Manual IO_DESTROY(2)
NAME
io_destroy - destroy an asynchronous I/O context
SYNOPSIS
#include <linux/aio_abi.h> /* Definition of aio_context_t */
#include <sys/syscall.h> /* Definition of SYS_* constants */
#include <unistd.h>
int syscall(SYS_io_destroy, aio_context_t ctx_id);
Note: glibc provides no wrapper for io_destroy(), necessitating the use of syscall(2).
DESCRIPTION
Note: this page describes the raw Linux system call interface. The wrapper function provided by libaio uses a different type for the ctx_id argument. See
NOTES.
The io_destroy() system call will attempt to cancel all outstanding asynchronous I/O operations against ctx_id, will block on the completion of all operations
that could not be canceled, and will destroy the ctx_id.
RETURN VALUE
On success, io_destroy() returns 0. For the failure return, see NOTES.
ERRORS
EFAULT The context pointed to is invalid.
EINVAL The AIO context specified by ctx_id is invalid.
ENOSYS io_destroy() is not implemented on this architecture.
VERSIONS
The asynchronous I/O system calls first appeared in Linux 2.5.
CONFORMING TO
io_destroy() is Linux-specific and should not be used in programs that are intended to be portable.
NOTES
You probably want to use the io_destroy() wrapper function provided by libaio.
Note that the libaio wrapper function uses a different type (io_context_t) for the ctx_id argument. Note also that the libaio wrapper does not follow the usual
C library conventions for indicating errors: on error it returns a negated error number (the negative of one of the values listed in ERRORS). If the system call
is invoked via syscall(2), then the return value follows the usual conventions for indicating an error: -1, with errno set to a (positive) value that indicates
the error.
SEE ALSO
io_cancel(2), io_getevents(2), io_setup(2), io_submit(2), aio(7)
Linux 2021-03-22 IO_DESTROY(2)