To all,
Is there a way to increase the resolution of the sleep function below what seems to be 20 msec limit. Is it possible to get resolution below 1 msec in Visual C++ Or is there a work around Thanks.
Sleep Function Resolution
Visual C++ General
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- Error including manifest in unmanaged dll project for both 32/64 builds. Thanks, I'll give this a try. Tag: Visual C++ General Sleep Function Resolution Visual C++
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- Native C++: Time to re-learn it. While all the .NET architecture is quite dandy, it just doesn't hit the spot. I'm looking to go back and start from scratch with Native C++. I already have some Native C++ experience, I've written a simple Tcp server, a simple GUI, but that's about it. I need to go back and learn everything I missed out on... So, what would be some good books to purchase to learn Native C++ from scratch Here's the route I would like to get several books so I can learn everything up to making GUI's... Thanks if you recommend a good book (I'm hoping you've read it if you're recommending it). Tag: Visual C++ General Sleep Function Resolution Visual C++
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- Problem in Image Retrieving Thanks for your reply. Actually I have created the Dll with image creation inside of the dll function. When I invoke the Dll from java and displaying that image in screen. At that time image retrieving takes 50 more seconds to display. So that is my problem. I need to send that full byte array data to the Java function and write image file in java. In Dll, the callback function calls repeteadly still full image capture. Each time retrieve 1024bytes from SDK library. So I need to append the data in memory stream of each time. Then only I send the full image data to the java function. Can we write the data through the file only why not in memory stream Please give your kind of suggestion. Tag: Visual C++ General Sleep Function Resolution Visual C++
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- Setting a Nullable type to null in C++ If I declare, for example, a Nullable Boolean type and assign it to a value, let's say true, how do I set it back to null if I want to . I tried NULL, nullptr, and I searched around the documentation a little bit and didn't find the answer. The best I could come up with that works is the following: Code Snippet Nullable<Boolean> nullbool; Nullable<Boolean> nb = true ; nb = nullbool; is there an equivalent keyword or constant in C++ to C# null or VB Nothing Tag: Visual C++ General Sleep Function Resolution Visual C++
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- Is it just me? Deleting handlers and functions w/VC2005 impossible Hi, I share your frustrations about doing this apparently simple task. The thread has gone quiet, did you ever figure out how to do this After a few days working with Visual Studio 2005 I have decided to revert back to MSDEV6 because it is taking too long to get used to. I simply dont have the time to spare. It looks to me as if Microsoft have deliberately changed as much as possible so that it looks new and interesting. Tag: Visual C++ General Sleep Function Resolution Visual C++
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- Changing character encoding changes appearance of dialog buttons I wouldn't over analyze it prior to trying the manifest approach Tag: Visual C++ General Sleep Function Resolution Visual C++
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- Adobe\Acrobat 7.0\ActiveX\pdfshell.dll appearing in my executable Neither the /verbose nor /verbose:lib produces any useful information Tag: Visual C++ General Sleep Function Resolution Visual C++
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- Create a program that opens a file and counts the whitespace-separated words in that file. I was working on an exercise: Create a program that opens a file and counts the whitespace-separated words in that file. The follwing is the correct answer I copied from solution mannual, but the output is Number of words = 0 which is oviously wrong. I was wondering what the problem could be. I did put the following code in a different project from the one that contains "helloworld.cpp". #include <iostream> #include <fstream> #include <string> using namespace std; int main() { ifstream f("helloworld.cpp"); int nwords=0; string word; while (f >> word) ++nwords; cout << "Number of words = " << nwords << endl; } Tag: Visual C++ General Sleep Function Resolution Visual C++
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- Create a program that opens a file and counts the whitespace-separated words in that file. I was working on an exercise: Create a program that opens a file and counts the whitespace-separated words in that file. The follwing is the correct answer I copied from solution mannual, but the output is Number of words = 0 which is oviously wrong. I was wondering what the problem could be. I did put the following code in a different project from the one that contains "helloworld.cpp". #include <iostream> #include <fstream> #include <string> using namespace std; int main() { ifstream f("helloworld.cpp"); int nwords=0; string word; while (f >> word) ++nwords; cout << "Number of words = " << nwords << endl; } Tag: Visual C++ General Sleep Function Resolution Visual C++
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- 4 threads created by CFileDialog::DoModal With VS2005/MFC in a dialog, I am using a file open common dialog to allow the user to select a file. The code for this is char fileTypes[]=_T( "My files (*.fil)|*.fil|All files|*.*||" ); CFileDialog dlg(TRUE,_T( "fil" ),_T( "*.fil" ),OFN_CREATEPROMPT|OFN_HIDEREADONLY|OFN_EXPLORER,fileTypes); dlg.m_ofn.lpstrTitle=title; dlg.m_ofn.lpstrInitialDir=startPath; int response=dlg.DoModal(); Preceding execution of this code, there is a single thread. Following the return from DoModal, there are 4 more threads. 1) How do I use the VS2005 interface to find out more about these threads All I can see in the Threads window is the address of the threads (7C0eb94 for all 4), and the thread ID, which means nothing to me. 2) Any ideas why these threads exist They are causing a memory allocation problem later on. Tag: Visual C++ General Sleep Function Resolution Visual C++
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- how to traverse to a paired brace in MSVC IDE? Hello! In Microsoft Visual C++ IDE, when a cursor is located near a brace (or a bracket), is their a way of moving the cursor to a paired brace (correspondingly, bracket), either via a hotkey or a menu item Such a feature would help a lot in speeding up the coding process. Thank you in advance for your help. Dmitry Tag: Visual C++ General Sleep Function Resolution Visual C++
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- VS2005 Implement an existing IDL If you copied the interface and class definitions from the existing .IDL into your new project's .IDL, that will do for 1). The class name you use for 2) doesn't matter; pick whatever you like. You'll end up with an empty "IMyClassName" in the .IDL, which you can ignore. As you deduced, the class name can't match any of the existing classes in the .IDL. After you do 3), you'll end up with an ATL COM object that implements two interfaces; the empty IMyClassName ATL gave you and the one from the "Implement Interface" step. Naturally, the new class will have its own CLSID and IID values; if you want, you can change them to match the original .IDL. WRT "you cannot just "add" a .IDL to the project ....they have their own IDL and a project cannot have 2 of them, as far as I know": yes, you can have as many .IDL files in a project as you want. Each .IDL will generate matching _i.c, _p,c, .h, and .TLB files. However, they also each put information into the common dlldata.c file, which is why that file says " To completely reconstruct this file, delete it and rerun MIDL on all the IDL files in this DLL , specifying this file for the /dlldata command line option " [emphasis added] Tag: Visual C++ General Sleep Function Resolution Visual C++
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- Returning dynamically created object; Steve Jackson wrote: I think I read this somewhere as well. From an efficiency perspective, I get why there is no value to duplicating ones self. Is there any other reason than for that of efficiency Steve, Yes, there is another reason...dynamically allocated memory managed by your class. The sequence of the assigment operator is as follows: Release any dynamically allocated memory managed by this class Allocate memory to hold the contents of the class to be assigned Copy the contents of the class to be assigned Return this class Now...by looking at the above sequence, it should become clear why checking for self-assigment is a *must* ... Okay....if it does not jump at you....the problem is with the first two steps...if you assign a class that contains dynamically allocated memory to itself, the memory (and its content) will be lost before they are copied over. In other words, after the self-assigment, your data is lost. Tag: Visual C++ General Sleep Function Resolution Visual C++
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- Trouble with bitmaps Frawley wrote: No, I realized that the problem is changing the data from hdcCompatible to a bitmap. I don't understand this concept at all X_X Hello, is the problem persist Combine both adjustments suggested by Viorel, the code works fine for me, so I am marking his posts as answer, If the problem persist, please follow up with further information, thanks. Tag: Visual C++ General Sleep Function Resolution Visual C++
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- Problem in Image Retrieving Thanks for your reply. Actually I have created the Dll with image creation inside of the dll function. When I invoke the Dll from java and displaying that image in screen. At that time image retrieving takes 50 more seconds to display. So that is my problem. I need to send that full byte array data to the Java function and write image file in java. In Dll, the callback function calls repeteadly still full image capture. Each time retrieve 1024bytes from SDK library. So I need to append the data in memory stream of each time. Then only I send the full image data to the java function. Can we write the data through the file only why not in memory stream Please give your kind of suggestion. Tag: Visual C++ General Sleep Function Resolution Visual C++
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- mouseclick event on form underlying object hi, i have a picturebox sitting on a form when the picturebox is clicked with the mouse, it of course raises the mouseclick event on the picturebox is there any way to ignore the picturebox so that a mouseclick event is raised on the underlying form (as if the picturebox was transparent) thanks Tag: Visual C++ General Sleep Function Resolution Visual C++
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Re: Visual C++ General Sleep Function Resolution
rtpninja
No, there's latency built in to all the Win32 timer/sleep functions.
You can try using a multimedia timer, but in my experience, and no matter what MS likes to say, Windows is a high-latency OS. I highly doubt you can get < 1 MS resolution reliably without dedicated hardware.
It's the reason why all the best audio/video suites (ProTools, etc) were initially debuted on the Mac. Only as hardware got faster did comparable programs start to appear on Windows.
Please don't be fooled by the hype. Windows is not a real-time OS. And was not intended to be. And can't be backfilled to be made to be.
Hope this helps.
James
Re: Visual C++ General Sleep Function Resolution
einaros
rtpninja wrote:
No, there's latency built in to all the Win32 timer/sleep functions.
Well it's not as much a latency issue as an effect of how time slices are divided between threads. When you call a function such as Sleep, the thread will typically yield its execution to the system or other threads. Even though the sleep itself isn't more than one millisecond, the thread will not be given new execution time until the next time the system clock ticks. Depending on the Windows version, the tick frequency can be anything from 7 to 55 milliseconds.
Re: Visual C++ General Sleep Function Resolution
parreg
Thanks,
I've pretty much come to the same conclusion. I've made my own timer using a loop and passing it a constant. But the
OS makes it somewhat jittery.
Thanks,
I've pretty much come to the same conclusion. I've made my own timer using a loop and passing it a constant. But the
OS makes it somewhat jittery.
Re: Visual C++ General Sleep Function Resolution
einaros
Chances are that the call itself will take more than one millisecond, so that would be futile.
Chances are that the call itself will take more than one millisecond, so that would be futile.