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Type: Posts; User: billconan

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  1. does os close a tcp connection due to idleness?

    we have implemented a remote control program.
    we have noticed that if an user doesn't send any control command for a long time (for example about one to two hours), the socket gets closed for some...
  2. Replies
    4
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    455

    Re: how to manage popup windows?

    I kinda think the api is irrelevant to the problem, but we are using Qt.

    I really want to find a silver bullet, I'm thinking of using state machine.

    error event will send pop up request to the...
  3. Replies
    4
    Views
    455

    how to manage popup windows?

    Hello,

    I’m working on a project that has many pop up windows. They are not organized properly and things are getting messy. I’m wondering if there are any common practice or design patterns for...
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    2
    Views
    1,513

    Re: MapViewOfFile problems

    I think I may know the answser:

    please see this article: http://blogs.technet.com/b/markrussinovich/archive/2009/03/26/3211216.aspx

    there is a 491mb limitation on xp for paged pool
  5. Replies
    2
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    1,513

    Re: MapViewOfFile problems

    I think I'm having the same issue.

    Does anyone has an answer?
  6. Replies
    1
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    1,064

    can't understand ipv4 and subnet mask

    hello guys,

    i can't understand the ip address and the subnet mask.


    my first question is:

    is the "subnet mask" only for the subnet?

    given a public ip, and a subnet mask, can you tell...
  7. Replies
    1
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    286

    flashy when refresh()

    hello guys,

    i'm implementing a simple game with c#. question is how to redraw the window form.

    my game loop is really simple:

    while (!stop)
    {

    ...
  8. program runs under xp but crash under vista

    hello guys,

    my program runs ok under the debug mode, but a little bit slow. so i compiled it with the release mode. and the program crashes.

    the problematic function is the __tmainCRTStartup()...
  9. can i modify a file without load the file in?

    hi guys,

    if i have a very large binary file, i only need to modify only value inside, can i do this without loading the file in? how?

    thanks.
  10. a question about switching from .net 1.1 to .net 2

    hello guys,

    i'm helping someone to update an old .net 1.1 code to the new .net 2. 0, is there anyway that i can change the windows form from the old style to the new style. say if i add a new...
  11. Replies
    3
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    623

    long loop problem

    hello guys,

    i'm writing a windows application. once the user click on a button, i will run a loop. the loop will take a long time to finish, and during the execution the program looks like dead. i...
  12. question about assigning values to a array member.

    hello guys,

    i have a very simple class:

    class A
    {
    float k[100];

    void assignValuesToK()
    {
  13. Replies
    4
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    4,003

    Re: msvcr90.dll not found in debug mode

    after copy msvcr90.dll to the project folder, now i see new problem:

    application made an attampt to load the c runtime library incorrectly
  14. Replies
    4
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    4,003

    msvcr90.dll not found in debug mode

    hello folks,

    i have an annoying problem:

    i duplicated one of my old vs2008 project folder, and did some modification on the duplicated one. everything just fine, but since the two projects are...
  15. Replies
    2
    Views
    862

    a -1.#IND problem

    hello guys,

    my program crashes, because some of the floats have a value of -1.#IND

    i know it is a symbol for infinity and probably caused by overflow.

    but my question is how to debug this...
  16. Re: does any body know how to get stock quotes?

    could you please give me an example
  17. does any body know how to get stock quotes?

    hello guys,

    i'm interested in a stock analysis program, but i don't how to get the stock prices.

    does anyone know some service or api can do this?

    thank you.
  18. Replies
    1
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    1,266

    question about using ptrace

    hello guys,

    one of my computer architecture homework tasks is to count the top 20 mostly executed assembly instruction.

    i couldn't find any such tool working under windows xp, but i know a...
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    895

    Re: any tool to count instructions?

    vtune gives an event based sampling test, which is similar to instruction count, but not exactly.

    there is a tool, called simplescalar. but that thing is very stupid, it doesn't compile.
  20. Replies
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    895

    Re: any tool to count instructions?

    unfortunately it doesn't

    i just found out that vtune will give that information.
  21. Replies
    4
    Views
    895

    any tool to count instructions?

    hello guys,

    i'm working on my computer architecture homework. of the tasks is to run a benchmark and count the top 20 mostly used instructions.

    but i don't know what kind of tool can do that.
    ...
  22. how do the computer know which process is listening to which port?

    hello guys,

    i have a basic and maybe stupid question. how do the computer know which process is listening to which port.

    for example i have several web browsers installed on my machine.

    and...
  23. Replies
    4
    Views
    888

    float point rounding error problems

    hello guys,

    in my program, i need to check if an arbitrary 3D line segment intersects with any edge of a 3D triangle (but they are actually in the same plane).

    my approach is to solve the...
  24. Replies
    2
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    817

    some stupid question

    hello guys,

    i know very little about network programming. i have some basic questions,

    i'm using a school machine, which has no public ip address. i'm wondering how to send things from a...
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    2
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    1,309

    Re: acos returns -1.#IND

    i guess i know the answer,

    i tried acos(1.00020001f), the result was -1.#INF
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