Re: Trying to design thread safe class - C# Discussion Boards

Re: Trying to design thread safe class

Member 120616001-Nov-15 0:23

Member 12061600

1-Nov-15 0:23

Yeah but I said what if I do

public static int X1()
  {
    
      return x1;
       
  }

Granted none calls these methods before INIT method is called (I can ensure this because I am writing those methods) - I will check isInited calls in the start of each method calling this class

Re: Trying to design thread safe class

John Torjo1-Nov-15 2:21

John Torjo

1-Nov-15 2:21

No, that is not thread-safe. This is :

public static int X1{} { lock(locker) return x1; }

Best,
John

-- Romania is in mourning

Re: Trying to design thread safe class

Member 120616001-Nov-15 4:36

Member 12061600

1-Nov-15 4:36

Please look at my final version and tell me what you think: http://codepad.org/T3D6uabs[^]

Re: Trying to design thread safe class

John Torjo1-Nov-15 21:26

John Torjo

1-Nov-15 21:26

yes, it's threadsafe

-- LogWizard - Log Viewing can be a joy!

Re: Trying to design thread safe class

Member 120616001-Nov-15 21:39

Member 12061600

1-Nov-15 21:39

Thanks a lot, few more questions, and I would appreciate if you can help:

- if I add more variables other than x1 and x2 but I maintain same style in accessing and initializing them will it affect thread safety? will it affect performance? (probably). Do you know more performance friendly way to solve the problem my class solves?

Re: Trying to design thread safe class

John Torjo2-Nov-15 4:17

John Torjo

2-Nov-15 4:17

1. if you add more variables in the same manner, yes
2. will it affect performance? don't worry about that, performance will be the same. And on the init()/deinit() - the "decrease" won't be noticeable.
3. Your class is fine

Best,
John

-- LogWizard - Log Viewing can be a joy!

Re: Trying to design thread safe class

Member 120616002-Nov-15 4:40

Member 12061600

2-Nov-15 4:40

Thanks a lot!!!

So you are saying if I add more properties in same manner, it won't be problem?

Re: Trying to design thread safe class

John Torjo2-Nov-15 20:00

John Torjo

2-Nov-15 20:00

Yup, that's exactly what I'm saying Smile | :)

Best,
John

-- LogWizard - Log Viewing can be a joy!

Re: Trying to design thread safe class

Member 120616002-Nov-15 20:17

Member 12061600

2-Nov-15 20:17

Thanks for help

Re: Trying to design thread safe class

John Torjo2-Nov-15 23:05

John Torjo

2-Nov-15 23:05

you're welcome

Best,
John

-- LogWizard - Log Viewing can be a joy!

Re: Trying to design thread safe class

BillWoodruff2-Nov-15 13:46

BillWoodruff

2-Nov-15 13:46

Great job supporting this OP, John. I am voting your replies up. cheers, Bill

«I want to stay as close to the edge as I can without going over. Out on the edge you see all kinds of things you can't see from the center» Kurt Vonnegut.

Re: Trying to design thread safe class

John Torjo2-Nov-15 20:00

John Torjo

2-Nov-15 20:00

Thanks

-- LogWizard - Log Viewing can be a joy!

Re: Trying to design thread safe class

Member 120616002-Nov-15 20:19

Member 12061600

2-Nov-15 20:19

I am voting your replies up.

me too

Re: Trying to design thread safe class

Member 1206160031-Oct-15 8:15

Member 12061600

31-Oct-15 8:15

granted anyone using Parameters class WILL first check if it was inited or not using getter

Re: Trying to design thread safe class

Member 1206160031-Oct-15 1:02

Member 12061600

31-Oct-15 1:02

does requirement to have public deinit make harder to make this class thread safe?

problems with windows Ui

Member 1209985029-Oct-15 22:25

Member 12099850

29-Oct-15 22:25

Hi,

I am having a Windows Ui for placing some text in Unighraphics-
So the problem is when i place a text i get "work in process" dialog(which is of Unigraphics), I want to close this but it doesnt,when i close the windows UI this dialog vanishes.
I want Windows ui but i dont want "work in process" dialog.

when i check task manager, i can see two applications , but both say same process in task manager ugraf.exe.

Please help I am using c#

Re: problems with windows Ui

F-ES Sitecore29-Oct-15 22:43

F-ES Sitecore

29-Oct-15 22:43

problems with windows UI[^]

Re: problems with windows Ui

BillWoodruff29-Oct-15 22:48

BillWoodruff

29-Oct-15 22:48

Please do not post the same message in two forums.

If you have spent thousands of US $ to purchase Unigraphics NX from Siemens, you are certainly entitled to tech support from them.

«I want to stay as close to the edge as I can without going over. Out on the edge you see all kinds of things you can't see from the center» Kurt Vonnegut.

Re: problems with windows Ui

Dave Kreskowiak30-Oct-15 3:09

Dave Kreskowiak

30-Oct-15 3:09

You're not going to get an answer to this question because you haven't conveyed any context information what-so-ever. We have no idea what you're doing, how you're doing it, what the code looks like and you haven't even provided a problem description that makes any sense.

Seriously, if you can't describe the problem you're trying to solve to us in sufficient detail, you have no hope of describing the solution to a computer.

A guide to posting questions on CodeProject

Click this: Asking questions is a skill.
Seriously, do it.

Dave Kreskowiak

FILETIME implementation in C#

Member 1206160029-Oct-15 21:27

Member 12061600

29-Oct-15 21:27

I have C++ code which has calls like this

1) SystemTimeToFileTime(&st, &m_Time)

Before above call st is assembled by assigning values to its members manually - but only year, month, day, hour, minutes and seconds are assigned to it.

m_Time is instance variable of type FILETIME.

Afterwards there is a function like that:

2) dppDatetime_t RsDateTime::GetAsPrepaidTime() const
{
    dppDatetime_t dt;// Just a custom structure, this is no problem to create in C#
    SYSTEMTIME st = GetLocalTimeAsSystem();
    dt.Year     = st.wYear;
    dt.Month    = st.wMonth;
    dt.Day      = st.wDay;
    dt.Hour     = st.wHour;
    dt.Minute   = st.wMinute;
    dt.Second   = st.wSecond;
    return dt;
}

GetLocalTimeAsSystem defined as:

3) SYSTEMTIME RsDateTime::GetLocalTimeAsSystem() const
{
    SYSTEMTIME st;

    ::FileTimeToSystemTime(&m_Time, &st);
    return st;
}

I basically need to replicate all this functionality I mentioned in above 1), 2), 3) points in C#. I would really appreciate some help on how to go with this? How to achieve same result in C#?

Can't I implement what is done above using only DateTime structure in C#?

modified 30-Oct-15 4:46am.

Re: FILETIME implementation in C#

John Torjo29-Oct-15 23:02

John Torjo

29-Oct-15 23:02

I really don't understand what you want. C++ has a lot of ugly structures for dealing with time, and in c# you don't have to care - you have the very-easy-to-use DateTime class.

For getting the current time, just use

DateTime.Now
DateTime.UtcNow

Best,
John

-- LogWizard - Log Viewing can be a joy!

Re: FILETIME implementation in C#

Member 1206160030-Oct-15 0:10

Member 12061600

30-Oct-15 0:10

I want to achieve steps 1 and 2 as in the question

Re: FILETIME implementation in C#

John Torjo30-Oct-15 0:46

John Torjo

30-Oct-15 0:46

they make no sense in c#

Best,
John

-- LogWizard - Log Viewing can be a joy!

Re: FILETIME implementation in C#

Richard MacCutchan29-Oct-15 23:06

Richard MacCutchan

29-Oct-15 23:06

This is essentially the same question as the one below. If you need to use one of the Win32 calls and returned structures then you need to use PInvoke. I gave you the links already.

Re: FILETIME implementation in C#

Member 1206160030-Oct-15 0:09

Member 12061600

30-Oct-15 0:09

If you look at my question carefully you can see I think I don't need PInvoke and I can achieve all with DateTime. That is why I asked

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