AIO_SUSPEND(3P) POSIX Programmer's Manual AIO_SUSPEND(3P)
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond-
ing 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 (REALTIME)
int aio_suspend(const struct aiocb * const list, int nent,
const struct timespec *timeout);
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.
If the aio_suspend() function returns after one or more asynchronous I/O operations have completed, the function shall return zero. Other-
wise, 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
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.
The aio_suspend() function is part of the Asynchronous Input and Output option and need not be available on all implementations.
aio_read(), aio_write(), lio_listio(), the Base Definitions volume of IEEE Std 1003.1-2001, <aio.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. 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.opengroup.org/unix/online.html .
/The Open Group 2003 AIO_SUSPEND(3P)