Hashtable + shared memory Post: 302485121

10 More Discussions You Might Find Interesting

1. Programming

Shared memory

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...

2. UNIX for Advanced & Expert Users

Shared memory shortage but lots of unused memory

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...

3. Linux

all about shared memory

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...

4. Programming

help with shared memory

what i want to do is have an int that can been written into by 2 processes but my code doesn't seem to work. #include <sys/types.h> #include <sys/ipc.h> #include <sys/sem.h> #include <sys/shm.h> #include<stdio.h> #define KEY1 (1492) int main() { int shmid; volatile int * addr;...

5. Programming

memory sharing - not shared memory -

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...

6. Programming

Shared memory in shared library

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...

7. Programming

Shared memory for shared library

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.

8. UNIX for Advanced & Expert Users

Shared Memory

Hi, Using ipcs we can see shared memory, etc.. details. How can I add/remove shared memory(command name)? Thanks, Naga:cool:

9. AIX

shared memory

1.How to know wich process is using the shared memory? 2.How to flush (release) the process from the shared memory?

10. Programming

Shared library with acces to shared memory.

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...

LEARN ABOUT XFREE86

crystal

crystal(6x)                                                     XScreenSaver manual                                                    crystal(6x)

NAME

       crystal - kaleidescope.

SYNOPSIS

       crystal  [-display  host:display.screen]  [-visual visual] [-window] [-root] [-grid] [-no-cell] [-centre] [-nx number] [-ny number] [-count
       number] [-delay number] [-ncolors number] [-fps]

DESCRIPTION

       Moving polygons, similar to a kaleidescope (more like a kaleidescope than the hack called `kaleid,' actually.)

OPTIONS

       -visual visual
               Specify which visual to use.  Legal values are the name of a visual class, or the id number (decimal or hex) of a specific visual.

       -window Draw on a newly-created window.  This is the default.

       -root   Draw on the root window.

       -grid | -no-grid
               Whether to draw grid.

       -cell | -no-cell
               Whether to draw the cell.

       -centre | -no-centre
               Whether to center on screen

       -nx number
               Horizontal Symmetries.   -10 - 10.  Default: -3.

       -ny number
               Vertical Symmetries.  -10 - 10.  Default: -3.

       -count number
               Count.    -5000 - 5000.  Default: -500.

       -delay number
               Per-frame delay, in microseconds.  Default: 60000 (0.06 seconds.).

       -ncolors number
               Number of Colors.  Default: 100.

       -fps    Display the current frame rate and CPU load.

ENVIRONMENT

       DISPLAY to get the default host and display number.

       XENVIRONMENT
               to get the name of a resource file that overrides the global resources stored in the RESOURCE_MANAGER property.

SEE ALSO

       X(1), xscreensaver(1)

COPYRIGHT

       Copyright (C) 2002 by Jouk Jansen.  Permission to use, copy, modify, distribute, and sell this software and its documentation for any  pur-
       pose  is  hereby granted without fee, provided that the above copyright notice appear in all copies and that both that copyright notice and
       this permission notice appear in supporting documentation.  No representations are made about the suitability of this software for any pur-
       pose.  It is provided "as is" without express or implied warranty.

AUTHOR

       Jouk Jansen.

X Version 11                                                    5.15 (28-Sep-2011)                                                     crystal(6x)

10 More Discussions You Might Find Interesting

1. Programming

Shared memory

Discussion started by: joseph_shibu

2. UNIX for Advanced & Expert Users

Shared memory shortage but lots of unused memory

Discussion started by: cjcamaro

3. Linux

all about shared memory

Discussion started by: vijaya2006

4. Programming

help with shared memory

Discussion started by: ddx08