Dear Reader,
Is is necessary to attach / dettach the shared memory segments for write operations , if more than one program is accessing same shared memory segments..
I have used semaphore mutex and still I'm getting segmentation fault when I write to the segment when other program is already... (1 Reply)
I am running HP-UX B.11.11.
I'm increasing a parameter for a database engine so that it uses more memory to buffer the disk drive (to speed up performance). I have over 5GB of memory not being used.
But when I try to start the DB with the increased buffer parameter I get told.
"Not... (1 Reply)
Hi all :confused: ,
I am new to unix.I have been asked to implement shared memory in user's mode.What does this mean?What is the difference it makes in kernel mode and in users mode?What are the advantages of this impemenation(user's mode)?
And also i would like to know why exactly shared... (0 Replies)
hi all
I have been asked to implement shared memory in user mode?But :rolleyes: im not understanding how to do this.And what does it mean in user mode?Is it that we need to simulate what kernal does...like attaching ,detaching memory..etc...?
And would also like to know why shared memory is... (3 Replies)
hi,
this is the problem: i want to swap a linked list between 4 processes (unrelated), is there any way i can do that just by sending a pointer to a structure?
//example
typedef struct node
{
int x;
char c;
struct node *next;
} node;
or i should send the items ( x,c ) by... (9 Replies)
I need to create a shared library to access an in memory DB. The DB is not huge, but big enough to make it cumbersome to carry around in every single process using the shared library. Luckily, it is pretty static information, so I don't need to worry much about synchronizing the data between... (12 Replies)
I am writing a shared library in Linux (but compatible with other UNIXes) and I want to allow multiple instances to share a piece of memory -- 1 byte is enough. What's the "best" way to do this? I want to optimize for speed and portability.
Obviously, I'll have to worry about mutual exclusion. (0 Replies)
Hello.
I am new to this forum and I would like to ask for advice about low level POSIX programming.
I have to implement a POSIX compliant C shared library.
A file will have some variables and the shared library will have some functions which need those variables.
There is one special... (5 Replies)
Discussion started by: iamjag
5 Replies
LEARN ABOUT REDHAT
xmscrollvisible
XmScrollVisible(library call) XmScrollVisible(library call)
NAME
XmScrollVisible -- A ScrolledWindow function that makes an invisible
descendant of a ScrolledWindow work area visible
SYNOPSIS
#include <Xm/ScrolledW.h>
void XmScrollVisible(
Widget scrollw_widget,
Widget widget,
Dimension left_right_margin,
Dimension top_bottom_margin);
DESCRIPTION
XmScrollVisible makes an obscured or partially obscured widget or gadget descendant of a ScrolledWindow work area visible. The function re-
positions the work area and sets the specified margins between the widget and the nearest viewport boundary. The widget's location relative
to the viewport determines whether one or both of the margins must be adjusted. This function requires that the XmNscrollingPolicy of the
ScrolledWindow widget be set to XmAUTOMATIC.
scrollw_widget
Specifies the ID of the ScrolledWindow widget whose work area window contains an obscured descendant.
widget Specifies the ID of the widget to be made visible.
left_right_margin
Specifies the margin to establish between the left or right edge of the widget and the associated edge of the viewport. This
margin is established only if the widget must be moved horizontally to make it visible.
top_bottom_margin
Specifies the margin to establish between the top or bottom edge of the widget and the associated edge of the viewport. This
margin is established only if the widget must be moved vertically to make it visible.
For a complete definition of ScrolledWindow and its associated resources, see XmScrolledWindow(3)RELATED XmScrolledWindow(3).
XmScrollVisible(library call)