10-17-2005
Quote:
Originally Posted by siegfried
but with a name like "wait", I assume the calling will be blocked until child dies. Correct?
It sounds like what you are describing is a serial approach and I want a parallel approach where all the children are executing in parallel.
Or perhaps I misunderstand...
Your code can have all the children executing in parallel. Write it such that the main parent process will fork children till there are no more left to fork, and then start wait()ing. The execution of the children will be parellel in this case, but the parent process will issue the waits in a serial manner.
Quote:
Originally Posted by siegfried
How would I block with signal handling? Would I have to poll and then sleep and then poll?
What is the name of the function to call so I can block until receiving a signal?
Check the man pages for sigaction and signal.
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LEARN ABOUT HPUX
xtmanagechildren
XtManageChildren(3X) XT FUNCTIONS XtManageChildren(3X)
NAME
XtManageChildren - manage children
SYNTAX
void XtManageChildren(children, num_children)
WidgetList children;
Cardinal num_children;
ARGUMENTS
children Specifies a list of child widgets.
num_children
Specifies the number of children.
DESCRIPTION
The XtManageChildren function performs the following:
o Issues an error if the children do not all have the same parent or if the parent is not a subclass of compositeWidgetClass.
o Returns immediately if the common parent is being destroyed; otherwise, for each unique child on the list, XtManageChildren ignores
the child if it already is managed or is being destroyed and marks it if not.
o If the parent is realized and after all children have been marked, it makes some of the newly managed children viewable:
- Calls the change_managed routine of the widgets' parent.
- Calls XtRealizeWidget on each previously unmanaged child that is unrealized.
- Maps each previously unmanaged child that has map_when_managed True.
Managing children is independent of the ordering of children and independent of creating and deleting children. The layout routine of the
parent should consider children whose managed field is True and should ignore all other children. Note that some composite widgets, espe-
cially fixed boxes, call XtManageChild from their insert_child procedure.
If the parent widget is realized, its change_managed procedure is called to notify it that its set of managed children has changed. The
parent can reposition and resize any of its children. It moves each child as needed by calling XtMoveWidget, which first updates the x and
y fields and then calls XMoveWindow if the widget is realized.
SEE ALSO
XtManageChild(3X), XtUnmanageChildren(3X), XtUnmanageChild(3X), XtChangeManagedSet(3X), XtIsManaged(3X)
X Version 11 Release 6 XtManageChildren(3X)