io_setup - 創建一個異步I / O的上下文

內容簡介

#include <libaio.h>

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描述

int io_setup (int maxevents, io_context_t \ctxp*);

描述

io_setup() creates an asynchronous I/O context capable of receiving at leastmaxevents. ctxp must not yiibai 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.

返回值

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

錯誤

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描述

EINVAL

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

EFAULT

An invalid yiibaier is passed for ctxp.

ENOMEM

Insufficient kernel resources are available.

EAGAIN

The specified maxevents exceeds the user’s limit of available events.

ENOSYS

io_setup() is not implemented on this architecture.

遵循於

io_setup() 是Linux特有的，並應在該旨在是可移植的程序不被使用。

VERSIONS

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

另請參閱

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

注意

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

AUTHOR

Kent Yoder.