AIOCANCEL(3C) Standard C Library Functions AIOCANCEL(3C)

NAME

aiocancel - cancel an asynchronous operation

SYNOPSIS

#include <sys/asynch.h>

int aiocancel(aio_result_t *resultp);

DESCRIPTION

aiocancel() cancels the asynchronous operation associated with the
result buffer pointed to by resultp. It may not be possible to
immediately cancel an operation which is in progress and in this
case, aiocancel() will not wait to cancel it.


Upon successful completion, aiocancel() returns 0 and the requested
operation is cancelled. The application will not receive the SIGIO
completion signal for an asynchronous operation that is successfully
cancelled.

RETURN VALUES

Upon successful completion, aiocancel() returns 0. Upon failure,
aiocancel() returns -1 and sets errno to indicate the error.

ERRORS

aiocancel() will fail if any of the following are true:

EACCES
The parameter resultp does not correspond to any
outstanding asynchronous operation, although there is at
least one currently outstanding.


EFAULT
resultp points to an address outside the address space of
the requesting process. See NOTES.


EINVAL
There are not any outstanding requests to cancel.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+---------------+-----------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+-----------------+
|MT-Level | Safe |
+---------------+-----------------+

SEE ALSO

aioread(3C), aiowait(3C), attributes(7)

NOTES

Passing an illegal address as resultp will result in setting errno to
EFAULT only if it is detected by the application process.

February 5, 1997 AIOCANCEL(3C)