AIO_SUSPEND(3)

AIO_SUSPEND(3) | NetBSD Library Functions Manual | AIO_SUSPEND(3)

# NAME

aio_suspend — suspend until asynchronous I/O operations or timeout complete (REALTIME)

# LIBRARY

POSIX Real-time Library (librt, -lrt)

# SYNOPSIS

#include <aio.h>

int
aio_suspend(const struct aiocb * const list[], int nent, const struct timespec * timeout);

# DESCRIPTION

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 struct timeout (see timespec(3)) has passed.

The list argument is an array of nent 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.
[EINTR]
  The suspend was interrupted by a signal.
[EINVAL]
  The list argument contains more than AIO_LISTIO_MAX asynchronous I/O requests, or at least one of the requests is not valid.

# SEE ALSO

aio(3), timespec(3)

# STANDARDS

The aio_suspend() system call is expected to conform to the IEEE Std 1003.1-2001 (“POSIX.1”) standard.

# HISTORY

The aio_suspend() system call first appeared in NetBSD 5.0.

May 17, 2010 | NetBSD 5.99