LQR_CARVER_CANCEL(3)
NAME
lqr_carver_cancel - cancel ongoing operations on a LqrCarver object
SYNOPSIS
#include <lqr.h> LqrRetVal lqr_carver_cancel(LqrCarver* carver);
DESCRIPTION
The function lqr_carver_cancel can be used to cancel an ongoing
operation which is currently being performed on the the LqrCarver
object pointed to by carver. It must be used asynchronouly, from within
an independent thread.
If an operation is in fact cancelled by this function, the function
which was performing the operation will return the value LQR_USRCANCEL,
and so will do any other operation successively called on the same
LqrCarver object whose return type is LqrRetVal; otherwise it will have
no effect.
Whenever a function returns LQR_USRCANCEL, it means that the LqrCarver
object is in an inconsistent state, and, since there is currently no
way to recover from this situation, any further operation on that
object must be avoided, and it must be destroyed.
This function will fail if invoked over attached LqrCarver objects.
RETURN VALUE
The return value follows the Liquid Rescale library signalling system.
However, it can be called multiple times, so it will never return
LQR_USRCANCEL itself.
SEE ALSO
LqrRetVal(3), lqr_carver_resize(3), lqr_carver_flatten(3)
COPYRIGHT
- Copyright (C) 2007-2009 Carlo Baldassi