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io_getevents()函數(shù) Unix/Linux

io_getevents - 讀取異步I/ O事件從隊(duì)列中完成

內(nèi)容簡(jiǎn)介

#include <linux/time.h>

#include <libaio.h>

標(biāo)簽 描述
long io_getevents (aio_context_t ctx_id, long min_nr, long nr, struct io_event*events, struct timespec *timeout);

描述

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_idtimeout 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.

返回值

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

錯(cuò)誤

標(biāo)簽 描述
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 yiibaier.

 

ENOSYS io_getevents() is not implemented on this architecture.

 

遵循于

io_getevents() 是Linux特有的,并應(yīng)在該旨在是可移植的程序不被使用。

版本

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

另請(qǐng)參閱

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

注意

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

作者

Kent Yoder.