io_getevents: Čtěte asynchronní I / O události z fronty dokončení

Originální popis anglicky: io_getevents - Read asynchronous I/O events from the completion queue

Návod, kniha: Linux Programmer's Manual

STRUČNĚ

#include <linux/time.h> #include <linux/aio.h>

POPIS / INSTRUKCE

io_getevents attempts to read at least min_nr events and up to nr events from the completion queue of the AIO context specified by ctx_id. timeout specifies the amount of time to wait for events, where a NULL timeout waits until at least min_nr events have been seen. Note that timeout is relative and will be updated if not NULL and the operation blocks.

NÁVRATOVÁ HODNOTA

io_getevents returns the number of events read: 0 if no events are available or < min_nr if the timeout has elapsed.

CHYBY / ERRORY

EINVAL

ctx_id is invalid. min_nr is out of range or nr is out of range.

 

EFAULT

Either events or timeout is an invalid pointer.

 

ENOSYS

io_getevents is not implemented on this architecture.

 

ODPOVÍDAJÍCÍ

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

NOTES

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

AUTHOR

Kent Yoder.