DESCRIPTION

The aio_suspend() function suspends the calling thread until one of the following occurs:

The nitems argument specifies the number of items in aiocb_list. Each item in the list pointed to by aiocb_list must be either NULL (and then is ignored), or a pointer to a control block on which I/O was initiated using aio_read(3), aio_write(3), or lio_listio(3). (See aio(7) for a description of the aiocb structure.)

If CLOCK_MONOTONIC is supported, this clock is used to measure the timeout interval (see clock_gettime(2)).

RETURN VALUE

If this function returns after completion of one of the I/O requests specified in aiocb_list, 0 is returned. Otherwise, −1 is returned, and errno is set to indicate the error.

ERRORS

VERSIONS

The aio_suspend() function is available since glibc 2.1.

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).

CONFORMING TO

POSIX.1-2001, POSIX.1-2008.

POSIX doesn't specify the parameters to be restrict; that is specific to glibc.

NOTES

One can achieve polling by using a non-NULL timeout that specifies a zero time interval.

If one or more of the asynchronous I/O operations specified in aiocb_list has already completed at the time of the call to aio_suspend(), then the call returns immediately.

To determine which I/O operations have completed after a successful return from aio_suspend(), use aio_error(3) to scan the list of aiocb structures pointed to by aiocb_list.

BUGS

The glibc implementation of aio_suspend() is not async-signal-safe, in violation of the requirements of POSIX.1.

SEE ALSO

aio_cancel(3), aio_error(3), aio_fsync(3), aio_read(3), aio_return(3), aio_write(3), lio_listio(3), aio(7), time(7)