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.
aio_suspend — wait for an asynchronous I/O request
int aio_suspend(const struct aiocb *const list, int nent,
const struct timespec * timeout);
() 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
is not NULL, until the time interval specified by
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
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
(). This array may contain null pointers, which are ignored.
If this array contains pointers that refer to aiocb
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
passes before any of the I/O operations referenced by
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.
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
The application may determine which asynchronous I/O completed by scanning the
associated error and return status using aio_error
() function shall fail if:
- No asynchronous I/O indicated in the list referenced by
list completed in the time interval indicated by
The following sections are informative.
- 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 Base Definitions volume of POSIX.1‐2008, <aio.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2013 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
7, Copyright (C) 2013 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. (This is POSIX.1-2008 with the 2013
Technical Corrigendum 1 applied.) In the event of any discrepancy between this
version and the original IEEE and The Open Group Standard, the original IEEE
and The Open Group Standard is the referee document. The original Standard can
be obtained online at http://www.unix.org/online.html .
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