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Googling I've found this [^] page...
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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Hi,
I am working on a project, where i see a declaration of a thread local variable as below.
__declspec(thread) long g_nLock[2] = {0, 0};
And this variable is accessed with InterlockedXXX functions.
My doubt is, this variable will have the global memory local to every thread.
In that case, is it required to use InterlockedXXX functions to access the variable?
If i change the allocation and access method of this variable using TLS APIs,
do i have to take care of locking?
Thanks in advance.
Selva
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I'm not familiar with whatever the TLS API is, but if you're accessing this variable from multiple different threads directly, you have to lock it. If you want to get around this, use only one thread to change it and post signals or windows messages to that thread telling the variable to change, that way you (probably) won't get any weird conflicts.
KR
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You are correct, each thread will have its own copy of g_nLock that no other thread can see or modify. As such, it doesn't make sense to modify it with an Interlocked*() function.
The same would be true for any blob you associate with a TLS index via TlsSetValue().
Note: Be carefull using __declspec(thread) in dll's, read the MS docs (this may no longer be an issue in VS2010 ?).
...cmk
The idea that I can be presented with a problem, set out to logically solve it with the tools at hand, and wind up with a program that could not be legally used because someone else followed the same logical steps some years ago and filed for a patent on it is horrifying.
- John Carmack
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hi
i want system Date and time with Milli second....
iam using
SYSTEMTIME st;
GetSystemTime(&st);
this one give wrong time...please any body
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In the documentation for GetSystemTime[^] it states "Retrieves the current system date and time. The system time is expressed in Coordinated Universal Time (UTC).".
It's time for a new signature.
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I use a SMTP client class in VC6 MFC project , it function , but it bother me some warnings :
:\program files\microsoft visual studio\vc98\include\utility(21) : warning C4786: 'std::reverse_iterator<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const *,std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,std::basic_string<char,std::char_traits<char>,std::allocator<char> > const &,std::basic_string<char,std::char_traits<char>,std::allocator<char> > const *,int>' : identifier was truncated to '255' characters in the debug information
d:\program files\microsoft visual studio\vc98\include\utility(21) : warning C4786: 'std::reverse_iterator<std::basic_string<char,std::char_traits<char>,std::allocator<char> > *,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std
::basic_string<char,std::char_traits<char>,std::allocator<char> > &,std::basic_string<char,std::char_traits<char>,std::allocator<char> > *,int>' : identifier was truncated to '255' characters in the debug information
and I have #pragma warning(disable:4786) in top of file , but obvious don't function ..... how to solve these warnings ?
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I want to do this without lowering my compiler warning level , if is posible ...
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It is a bug in VC6. For more information see here[^].
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Thanks , I solved the problem inserting
#pragma warning(disable:4786)
before to
#include <vector>
this class use
std::vector <std:string> Attachement;
could I fix the problem without '#pragma warning(disable:4786)' ?
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mesajflaviu wrote: #pragma warning(disable:4786)
This would be better:
#if _MSC_VER <= 1200
#pragma warning(disable:4786)
#endif
Don't inflict hacks on compilers that don't need them.
Steve
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mesajflaviu wrote: could I fix the problem without '#pragma warning(disable:4786)' ?
IMO, No.
This warning is caused by STL itself and you can disable it only for STL headers. See this[^] article for details.
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How to load Png image on the button control in MFC application.
Can anybody send me some source code, please..
Thanks..
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See answer to the message below.
It's time for a new signature.
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Hi want to create a button on which three png images will be there, one image for the reght side corner, one for the left side corner and one strip from the middle will be there, the middle strip I have to render according to length of the button( as button length will be changeable according to the button text(for multi language support)). I did that with .bmp file but I want to know how I can do with png file. one png Image I am able to add, but how to add all three?
Please help..
Thanks..
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You have already been given the answer here[^], which part of the suggested solution are you having difficulty with?
It's time for a new signature.
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Hi all,
When i m trying to open CFileDialog my application becomes not responding and gives this error
unhandled exception in test.exe (SECUR32.dll): 0xC0000005 Access Violation
and poiint out in Disassembly"75DD21DC push dword ptr [edi+0Ch]"
and in call stack "SECUR32! 685f21dc()"
i m using this code for CFileDialog
CFileDialog fDlg(FALSE, NULL,NULL, OFN_PATHMUSTEXIST | OFN_OVERWRITEPROMPT,"Text Files (*.txt)|*.txt||");
if (fDlg.DoModal () == IDCANCEL)
return;
please help me how can i resolve it.
thanks in advance.
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Check that you didn't missed to call "InitCommonControls" in your application initialization function.
Put a breakpoint and find the exact location where the crash occurs, you will defiantly find a NULL pointer or HANDLE (m_hWnd).
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You haven't show the line in this code where that causes the fault. I've got a question: have you got any shell extensions installed?
Steve
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uhen execute DoModal() of CFileDialog,this problem occur.
what type of shell extension?
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The kind that's crashes! Call you post a call stack?
Steve
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SECUR32! 6c9121dc()
SECUR32! 6c91232a()
SECUR32! 6c912254()
SHELL32! 769b146c()
SHELL32! 76b7a2a0()
SHELL32! 7698236f()
SHELL32! 76b7a345()
SHELL32! 76b7a41e()
COMDLG32! 763e0323()
COMDLG32! 763e23f8()
SHELL32! 76c16feb()
SHELL32! 76c16f45()
SHLWAPI! 77760f49()
SHELL32! 76a9dcbd()
SHELL32! 76a9dbf9()
SHELL32! 76a9dbf9()
SHELL32! 76a9dbf9()
SHELL32! 76a9dbf9()
SHELL32! 76a9dbf9()
SHELL32! 76a9dbf9()
SHELL32! 76a77331()
SHELL32! 76a76a23()
SHELL32! 76a76eef()
SHELL32! 76a3d57d()
COMDLG32! 763bd124()
COMDLG32! 763b92cf()
COMDLG32! 763b9783()
USER32! 7621fd72()
USER32! 76214ae0()
USER32! 7621481f()
USER32! 762226da()
USER32! 7621fd72()
USER32! 7621fe4a()
USER32! 762209d3()
USER32! 7622b759()
Test! 01010bf0()
Test! 01012983()
Test! 01010d28()
Test! 01013133()
Test! 010131c2()
USER32! 7621fd72()
USER32! 7621fe4a()
USER32! 76220943()
USER32! 7620b19f()
USER32! 76232dad()
USER32! 76232eec()
USER32! 76232f10()
COMDLG32! 763b6eb8()
Test! 0101db54()
Test! 0100daec()
Test! 010163fa()
Test! 01016609()
Test! 0100f7b8()
Test! 01013ce6()
Test! 01014770()
Test! 01010d28()
Test! 01013133()
Test! 010131c2()
USER32! 7621fd72()
USER32! 7621fe4a()
USER32! 76220943()
USER32! 76220b36()
COMCTL32! 74d2b4b2()
COMCTL32! 74d2b514()
COMCTL32! 74d2b61f()
USER32! 7621fd72()
USER32! 7621fe4a()
USER32! 762209d3()
USER32! 7622b759()
Test! 01010bf0()
Test! 01010d3f()
Test! 01013133()
Test! 010131c2()
USER32! 7621fd72()
USER32! 7621fe4a()
USER32! 7622018d()
USER32! 7622022b()
USER32! 762151f5()
USER32! 76221891()
Test! 010158cd()
Test! 01011147()
Test! 0100f795()
Test! 0100e1c4()
Test! 0101b52c()
Test! 0101b70d()
Test! 0101b577()
Test! 0101b75a()
Test! 0100fdf9()
Test! 01002863()
Test! 01045af9()
Test! 010302ba()
KERNEL32! 762ed0e9()
NTDLL! 778d19bb()
NTDLL! 778d198e()
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This isn't very helpful without symbol names! Try in a debug build and post the stack. If it only crashes in release mode (which is a clue in itself) turn on debug information for the release build and try again.
Steve
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