io_setup: Vytvořit asynchronní I / O kontext

Originální popis anglicky: io_setup - Create an asynchronous I/O context

Návod, kniha: Linux Programmer's Manual

STRUČNĚ

#include <linux/aio.h>

POPIS / INSTRUKCE

io_setup creates an asynchronous I/O context capable of receiving at least nr_events. ctxp must not point to an AIO context that already exists, and must be initialized to 0 prior to the call. On successful creation of the AIO context, *ctxp is filled in with the resulting handle.

NÁVRATOVÁ HODNOTA

io_setup returns 0 on success; otherwise, one of the errors listed in the "Errors" section is returned.

CHYBY / ERRORY

EINVAL

ctxp is not initialized, or the specified nr_events exceeds internal limits. nr_events should be greater than 0.

 

EFAULT

An invalid pointer is passed for ctxp.

 

ENOMEM

Insufficient kernel resources are available.

 

EAGAIN

The specified nr_events exceeds the user's limit of available events.

 

ENOSYS

io_setup is not implemented on this architecture.

 

ODPOVÍDAJÍCÍ

io_setup is Linux specific and should not be used in programs that are intended to be portable.

VERSIONS

The asynchronous I/O system calls first appeared in Linux 2.5, August 2002.

SOUVISEJÍCÍ

io_destroy(2), io_getevents(2), io_submit(2), io_cancel(2).

NOTES

The asynchronous I/O system calls were written by Benjamin LaHaise.

AUTHOR

Kent Yoder.