aio_suspend2
Suspend until asynchronous i/o operations or timeout complete (realtime)
Usage
#include <aio.h>
int
aio_suspend(const struct aiocb *const iocbs[], int niocb, const struct timespec *timeout);
Library
Standard C Library (libc, -lc)
Overview
The aio_suspend() system call suspends the calling process until at least one of the specified asynchronous I/O requests have completed, a signal is delivered, or the timeout has passed.
The iocbs argument is an array of niocb pointers to asynchronous I/O requests. Array members containing null pointers will be silently ignored.
If timeout is not a null pointer, it specifies a maximum interval to suspend. If timeout is a null pointer, the suspend blocks indefinitely. To effect a poll, the timeout should point to a zero-value timespec structure.
Return values
If one or more of the specified asynchronous I/O requests have completed, aio_suspend() returns 0. Otherwise it returns -1 and sets errno to indicate the error, as enumerated below.
Errors
The aio_suspend() system call will fail if:
- [EAGAIN]
-
the timeout expired before any I/O requests completed.
- [EINVAL]
-
The iocbs argument contains more asynchronous I/O requests than the vfs.aio.max_aio_queue_per_proc sysctl(8) variable, or at least one of the requests is not valid.
- [EINTR]
-
the suspend was interrupted by a signal.
Releases
74 releases since FreeBSD 3.3-RELEASE; the text changed 43 times.