ждать запроса асинхронного ввода-вывода (wait for an asynchronous I/O request)
Пролог (Prolog)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
Имя (Name)
aio_suspend — wait for an asynchronous I/O request
Синопсис (Synopsis)
#include <aio.h>
int aio_suspend(const struct aiocb *const list[], int nent,
const struct timespec *timeout);
Описание (Description)
The aio_suspend() function shall suspend the calling thread until
at least one of the asynchronous I/O operations referenced by the
list argument has completed, until a signal interrupts the
function, or, if timeout is not NULL, until the time interval
specified by timeout has passed. If any of the aiocb structures
in the list correspond to completed asynchronous I/O operations
(that is, the error status for the operation is not equal to
[EINPROGRESS]) at the time of the call, the function shall return
without suspending the calling thread. The list argument is an
array of pointers to asynchronous I/O control blocks. The nent
argument indicates the number of elements in the array. Each
aiocb structure pointed to has been used in initiating an
asynchronous I/O request via aio_read(), aio_write(), or
lio_listio(). This array may contain null pointers, which are
ignored. If this array contains pointers that refer to aiocb
structures that have not been used in submitting asynchronous
I/O, the effect is undefined.
If the time interval indicated in the timespec structure pointed
to by timeout passes before any of the I/O operations referenced
by list are completed, then aio_suspend() shall return with an
error. If the Monotonic Clock option is supported, the clock
that shall be used to measure this time interval shall be the
CLOCK_MONOTONIC clock.
Возвращаемое значение (Return value)
If the aio_suspend() function returns after one or more
asynchronous I/O operations have completed, the function shall
return zero. Otherwise, the function shall return a value of -1
and set errno to indicate the error.
The application may determine which asynchronous I/O completed by
scanning the associated error and return status using aio_error()
and aio_return(), respectively.
Ошибки (Error)
The aio_suspend() function shall fail if:
EAGAIN No asynchronous I/O indicated in the list referenced by
list completed in the time interval indicated by timeout.
EINTR A signal interrupted the aio_suspend() function. Note
that, since each asynchronous I/O operation may possibly
provoke a signal when it completes, this error return may
be caused by the completion of one (or more) of the very
I/O operations being awaited.
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
aio_read(3p), aio_write(3p), lio_listio(3p)
The Base Definitions volume of POSIX.1‐2017, aio.h(0p)
