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  • Timer to find elapsed time in a function call in C

    - by Mohit Nanda
    I want to calculate time elapsed during a function call in C, to the precision of 1 nanosecond. Is there a timer function available in C to do it? If yes please provide a sample code-snippet. Pseudo code Timer.Start() foo(); Timer.Stop() Display time elapsed in execution of foo() Environment details: - using gcc 3.4 compiler on a RHEL machine

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  • Computer to act as keyboard

    - by Joe
    Title explains it. Imagine this example, Host computer connects to a Client computer via male/male usb connection. Client computer acknowledges this connection as a new device, in this case a keyboard. The host computer can now send key events to the client computer and the client computer would process them as a normal keyboard event. I did a whole lot of searching in the internet and really have drove down many dead ends. Any tips would be appreciated. Note* this is a physical connection. The client computer should not have to install any software for this to function (The host will completely spoof as a keyboard).

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  • SimpleDB as Denormalized DB

    - by Max
    In an environment where you have a relational database which handles all business transactions is it a good idea to utilise SimpleDB for all data queries to have faster and more lightweight search? So the master data storage would be a relational DB which is "replicated"/"transformed" into SimpleDB to provide very fast read only queries since no JOINS and complicated subselects are needed.

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  • tomcat startup.sh trouble finding JAVA_HOME

    - by peter
    I am a bit puzzled by this strange behavior on CentOs 5.4 when starting Tomcat 6.0 as a service I've added a script at /etc/init.d/tomcat that can start/stop/restart Apache Tomcat 6.0 with user 'tomcat', and registered it as service. The problem with the service is that I am getting a 'Neither the JAVA_HOME nor the JRE_HOME environment variable is defined'. But when type 'sudo -u tomcat echo $JAVA_HOME' I get '/usr/java/jdk1.5.0_22' which is correct since I am using that JDK. What can I do about this?

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  • Windows Load Balancing Services and File Shares

    - by cbkadel
    We are using Windows Load Balancing Services (WLBS). One of the things that I do notice, is that if I create a File Share on one of the physical hosts, I am able browse to that file share using the clustered-ip address. This might be a 'opinion' question, but I haven't been able to find much literature on file shares in particular with wlbs. Is this a recommendation configuration? Are there any limitations? What about when the share contains different sets of content on both hosts? For instance: Three 'hostnames' - host1 (physical1), host2 (physical2), and cluster. I create the following shares: \physical1\myshare \physical2\myshare What I notice is that i can see: \cluster\myshare I'm guessing that this is read-only, and that there's no file synchronization. But what happens if they are in fact out of sync, what would a network browser see then? Thanks for your time!

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  • Implication of (not) rethrowing exception after logging

    - by dotnetdev
    Hi, In a team environment, if I handle an exception (like so): protected void Page_Load(object sender, EventArgs e) { this.exTest(); } public void exTest() { try { throw new Exception("sjsj"); } catch (Exception ex) { string s = ex.Message; throw; } } What is the implication of not rethrowing the exception (throw)? Even without the keyword the custom error settings in web.config are used (redirection to specified page). Thanks

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  • Working on a cross platform library...

    - by Alon
    What are the best practices on writing a cross platform library in C++? My development environment is Eclipse CDT on Linux, but my library should have the possibility to compile natively on Windows either (from Visual C++ for example).

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  • Wireless option grayed out in Windows Mobility Center

    - by thomasvdb
    We currently have a Lenovo ThinkPad L512 which can't connect to wireless networks. He simply indicates he can't find any networks. Other notebooks (also ThinkPad L512-notebooks) in the company do find the network so nothings wrong with the configuration of the wireless router. As indicated on answer.microsoft.com, I should check Windows Mobility Center and enable the entry "Turn Wireless On". Unfortunately this option has been grayed out. How can I enable this option? There isn't a physical switch on the laptop to turn on the wireless.

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  • Viewing and edditing embeded resources

    - by Bluephlame
    I am moving an assembly with an embedded resource into a test environment, I am having issues with some of the details in an embedded XML file and need to check if they are correct. Are there any tools that will allow me to look at the embedded resources in the .NET assembly? Even better if there is one that i can edit and drop back in.

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  • Will "Programming in the Cloud" Ever Take off?

    - by Pierreten
    Just got a chance to try out a cloud programming environment that let's you develop .net apps within the browser (http://coderun.com/ide/) I found it pretty interesting, since I was able to develop a mockup ASP.net site on an IPad. With javascript engines in browsers becoming faster and faster, cheap server infrastructure to compile on; will the cloud become the IDE platform of the future?

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  • Standalone application in C, a good idea?

    - by chutsu
    The term has several definition according to Wikipedia, however what I'm really interested in is creating a program that has all its needed dependencies included within the source folder, so the end user doesn't need to install additional libraries for the app to install. For example, how Mac apps has all its dependencies all within the program itself already... or is there a function that autotools does this? I'm programming in the Linux environment...

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  • SQL Server 2008 error message from store procedure

    - by George2
    Hello everyone, When we met with such error message from store procedure, Message 1205, Level 13, State 52, the process Pr_FooV2, Line 9 Services (Process ID 111) and another process is deadlock in the lock | communication buffer resources, and has been chosen as the deadlock victim. Rerun the transaction. I am wondering whether such messages are stored in log files? I searched log folder of my SQL Server 2008 installation root (in my environment, it is C:\Program Files\Microsoft SQL Server\MSSQL10.MSSQLSERVER\MSSQL\Log), but can not find such files. thanks in avdance, George

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  • Hard drive partition size wrong. How do I resize without loss of data?

    - by BreezyChick89
    $ fsck fsck from util-linux 2.20.1 e2fsck 1.42 (29-Nov-2011) The filesystem size (according to the superblock) is 610471680 blocks The physical size of the device is 536870911 blocks Either the superblock or the partition table is likely to be corrupt! It should be 1 partition but it now shows 2.2tb partitioned and .3tb unpartitioned How do I make the first partition correctly be 2.5tb without destroying whatever is in either partition? I did not raid or anything. My devices have been getting repeatedly corrupt by thunderstorms. Looks like people recommend doing something like in other places. sudo resize2fs /dev/sdc1 610471680

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  • Load Balancing and High Availability for Web Site

    - by nzgirl
    We've developing a database driven (70%/30% read/write load) website using C#.NET, IIS and MS SQL Server 2008 to be hosted on Windows 2008. Due to contractual reasons our setup has to be hosted on our own physical/virtual servers instead of a cloud solution at this stage. Could someone outline or link to some best practices that would provide both high availability (priority at the moment) and eventually load balancing for our site. We're probably looking at some sort of 2 SQL server mirrored system and 2 ISS web servers to start with. Thanks in advance.

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  • Trouble loading an ISO

    - by crocyson
    I've created a boot disk and ISO image with paragon. I boot up the Virtual pc with the disk in and I get to my recovery page. When I am supposed to select an ISO image? My Virtual PC doesn't acknowledge any of my physical hard drives on my host PC. I've also tried copy/paste the files into my datastore and they do not show up. I've tried the option during the set up to start with the ISO but again I am not able to browse to my external hard drive that I have stored the ISO on. VMWare will acknowledge it and say that it is connected but I can't browse to it. Am I doing something wrong? I created the back up disk and ISO image on the external with paragon.

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  • Singleton & Multithreading in Java

    - by vivek jagtap
    What is the preferred way to work with Singleton class in multithreaded environment? Suppose if I have 3 thread, and all they try to access getInstance() method of singleton class at the same time - What would happen if no synchronization is maintained? Is it good practice to use synchronized getInstance() method or use synchronized block inside getInstance(). Please advise if there is any other way out.

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  • Creating a multiplatform webapp with HTML5 and Google maps

    - by Bart L.
    I'm struggling how to develop a webapp for Android and iOS. My first app was a simple todo app which was easy to test in my browser and it only used html, javascript and css. However, I have to create an app which uses Google Maps Api to get the location. I created a simple html5 page to test which places a marker on a map. It works fine when testing it on my local server. But when I create an .apk file for Android, the app doesn't work. So I'm wondering, isn't it possible to use it like this? Do I have the use the phonegap libraries to use their geolocation library? And if so, how do you handle the development of a webapp in phonegap for multiple OS? Do you have to install an Android environment and an iOS environment to each include the right phonegap library and to test them properly? Update: I use the following code on my webserver and it works perfectly. When I upload it in a zip-folder to the photogap cloud and install the APK file on my phone, it doesn't work. <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Simple Geo test</title> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8/jquery.min.js"></script> </head> <body> <script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=true"></script> <script> function success(position) { var mapcanvas = document.createElement('div'); mapcanvas.id = 'mapcontainer'; mapcanvas.style.height = '200px'; mapcanvas.style.width = '200px'; document.querySelector('article').appendChild(mapcanvas); var coords = new google.maps.LatLng(position.coords.latitude, position.coords.longitude); var options = { zoom: 15, center: coords, mapTypeControl: false, navigationControlOptions: { style: google.maps.NavigationControlStyle.SMALL }, mapTypeId: google.maps.MapTypeId.ROADMAP }; var map = new google.maps.Map(document.getElementById("mapcontainer"), options); var marker = new google.maps.Marker({ position: coords, map: map, title:"You are here!" }); } if (navigator.geolocation) { navigator.geolocation.getCurrentPosition(success); } else { error('Geo Location is not supported'); } </script> <article></article> </body> </html>

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  • Device that connects to a switch via RJ45, that emulates a PC

    - by Mike Christiansen
    One of my co-workers once saw a device that plugged into a RJ45 jack, that emulated a PC. It could be configured with an IP address, and respond to pings. I was wondering if anyone knew about these, or even what they are called? This will be used to simulate a PC in a classroom environment. Thanks in advance. Edit: This is a CCNA classroom, we are looking to simulate a PC connected to an ethernet port on a router. These will be on different subnets, etc. This might be doable with a VM through VLANs and virtual switches, but then we are getting away from configuring the physical ports on the router the way we want to.

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  • Why does 99.99 / 100 = 0.9998999999999999

    - by the-locster
    Whereas 99.99 * 0.01 = 0.99 Clearly this is the age old floating point rounding issue, however the rounding error in this case seems quite large to me; what I mean is I might have expected a result of 0.99990000001 or some similar 'close' result. And for the record I got the same answer in a JavaVM and in a .Net environment.

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  • As a programmer, how much time do you spend churning?

    - by Chinnery
    I recently went through a period of frustration, "churning" as I tried to set up my environment to work effectively on a task. By the time I broke through and started to make actual progress, I felt tired and kind of angry. (I'll admit: in this case, it took me several days of banging my head and ultimately starting from scratch to finally get around the problems.) This experience made me wonder: When a roadblock happens to other programmers, how long do they churn before finally becoming productive and beginning what feels like actual work?

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  • xen virtual machines get to many porcentages of cpus

    - by ki0
    Hi everyone, This is my question. I have one Xen server with 8 CPU's and 6 virtual machine running, each virtual hard disk are running in diferent physical hardisk. Everything worked fine but sometimes one virtual machine get almost whole CPU, if the Domain-0 is 90% that is normal, the virtual machine is 500% usage of CPU. I have improved that it is not depends who are working with the VM even when nobody are working with the server this still happens. I dont know what happen. Anyone have any idea?¿ or anyone have happened the same?¿

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  • Equalizer for Toshiba Satellite Pro Laptop (Windows 7) (has Realtek sound)

    - by Need Help
    Hi, I've been trying to find a way to have a real equalizer for my Toshiba Satellite Pro Laptop. I don't know much about computers but the guys in the store seem to know less than I do! From what I've been able to glean through friends, Windows 7 no longer supports a real equalizer function with Realtek, and the result is a fake "equalizer" that does nothing. I have hearing issues so not being able properly adjust the higher frequencies is causing me physical pain and ringing in my ears. I've tried to decipher the threads I find online but am quite confused by them. Basically I need an equalizer that will work with Windows 7 (with everything, internet, skype, music, etc). The current drivers offered by Realtek do nothing except make the sound inaudible. The one that may possibly work and provide an actual equalizer is a few versions back and can't be found anywhere. Thanks! And sorry if this is a duplicate question but I am confused a bit by the threads online.

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  • How to parse the AndroidManifest.xml file inside an .apk package

    - by jnorris
    This file appears to be in a binary XML format. What is this format and how can it be parsed programmatically (as opposed to using the aapt dump tool in the SDK)? This binary format is not discussed in the in the documentation here: http://developer.android.com/guide/topics/manifest/manifest-intro.html Note: I want to access this information from outside the Android environment, preferably from Java.

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