|
Graham Bradshaw wrote: Are you saying that you'll get two, simultaneous calls to DllMain with a dwReason of DLL_PROCESS_ATTACH?
No, I'm saying that if you need a client to call init(), init() could be called from multiple threads simultaneously. You can't enforce this by soft, I think.
I know that DllMain is called only once with a dwReason of DLL_PROCESS_ATTACH for a process that loads that dll, but what if I want to link my library statically? DllMain will not be called and I can't use static objects (because of initialization order issues) and the init() method is unsafe, what should I do?
Of course I can solve this with the DllMain thing, not linking statically, but I wanted something more OS independent...
Thanks,
Federico
|
|
|
|
|
Don't allow the client to call your software during image load and use a RAII static critical section. This can be a verbal contract that isn't enforced in software.
Having things happen during image load is a really bad idea and leads to the types of problems you are having to deal with. If you just have to have things happen on image load via constructors, the constructors should never refrence another C++ object and only reference POD objects.
Tim Smith
I'm going to patent thought. I have yet to see any prior art.
|
|
|
|
|
This might be a dumb question, but would a static local (not member) variable in the init() function work? It would be initialzed to zero at first entry into the function, and you could check/increment the value using InterlockedCompareExchange() to see if initialization has taken place or not. You could use two variables, one to enter initialization of the Critical Section, and another to indicate that the CS was initialized. That might prevent two threads from racing on initialization of the CS and entering it - if one thread fails the first InterlockedCompareExchange() call, the second would confirm that the CS is initialized and ready for use.
I am not certain, but I think that initialization of a function-local static variable is thread-safe. But I could be wrong. Either way, the use of InterlockedCompareExchange() is thread-safe and that might work for you.
Peace!
-=- James
If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Tip for new SUV drivers: Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
DeleteFXPFiles & CheckFavorites (Please rate this post!)
|
|
|
|
|
Hi all,
After using the navigate method to open a webpage, i want to lock the content of the webpage (user can't do anything in the view like right mouse clicking, copying text...) just can scroll the web page. I tried using the EnableWindow method but it disabled both the view and the scroll bar ( i don't want disable the scrollbar). Do you have any solution for this case ?
thanks,
Ken
|
|
|
|
|
You can IThumbnailCapture to capture a snapshot...
My blogs:
http://blog.joycode.com/jiangsheng
http://blog.csdn.net/jiangsheng
http://bloglines.com/public/jiangsheng
Command what is yours
Conquer what is not
---Kane
|
|
|
|
|
How to get CBitmap from CImageList?
I tried CImageList::GetImageInfo, but can't get it correctly.
|
|
|
|
|
followait wrote: can't get it correctly
It should work, though.CAn you post your code ? What goes wrong ? Does the function return 0, or is the bitmap handle invalid ?
~RaGE();
|
|
|
|
|
all the test code is in the button click msg handler
void CTest_CImgaeListDlg::OnButton1()
{
CClientDC dc(this);
//create a CBitmap, a simple rect, (0,0,10,10)
CBitmap bmp;
bmp.CreateCompatibleBitmap(&dc,16,16);
CDC dcMem;
dcMem.CreateCompatibleDC(&dc);
CBitmap *pOldBmp=dcMem.SelectObject(&bmp);
dcMem.Rectangle(0,0,10,10);
dcMem.SelectObject(pOldBmp);
//save it in iml, and get it immediately, but there is something worng
CImageList iml;
iml.Create(16,16,ILC_COLOR24,5,5);
int idx=iml.Add(&bmp,RGB(0,0,0));
IMAGEINFO ii;
iml.GetImageInfo(idx,&ii);
CBitmap *pBmp=CBitmap::FromHandle(ii.hbmImage);
pOldBmp=dcMem.SelectObject(pBmp);
dc.BitBlt(0,0,16,16,&dcMem,0,0,SRCCOPY);
dcMem.SelectObject(pOldBmp);
}
|
|
|
|
|
This will not help you much, but this code works perfectly on my machine.
~RaGE();
|
|
|
|
|
|
bolia its possible to call javascript from an applet. but i'm not sure with active-x 
He is like a one-legged man in a bum kicking competition. -Novjot Sidhu
--[v]--
|
|
|
|
|
|
JIANG, Sheng[MVP] wrote: http://support.microsoft.com/support/kb/articles/Q172/7/63.ASP[^]
Hello Sir,
Above link is not working ! thanks
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
|
|
|
|
|
This link works fine on my computer.
My blogs:
http://blog.joycode.com/jiangsheng
http://blog.csdn.net/jiangsheng
http://bloglines.com/public/jiangsheng
Command what is yours
Conquer what is not
---Kane
|
|
|
|
|
Does C++ have an API that gets the type of an object. I want to determine an object type during run time. Say for example, i have an object x ( which is of type CDialog), then i want to determine its type during run time. Thanks in advance!
|
|
|
|
|
Hava a look on CRuntimeClass, CObject classes in the help. I think they are what you are looking for.
|
|
|
|
|
typeid Operator
C++ Specific —>
typeid( type-id )
typeid( expression )
The typeid operator allows the type of an object to be determined at run-time.
The result of a typeid expression is a const type_info&. The value is a reference to a type_info object that represents either the type-id or the type of the expression, depending on which form of typeid is used. See type_info Class for more information.
|
|
|
|
|
Try:
CDialog dlg;
if (dlg.IsKindOf(RUNTIME_CLASS(CDialog)))
...
"Take only what you need and leave the land as you found it." - Native American Proverb
|
|
|
|
|
Hello!
I have a strange problem.
There are a TestApplication and a DLL.
DLL exports one function:
__declspec ( dllexport ) void StartTest (HWND hWnd)<br />
{<br />
AFX_MANAGE_STATE(AfxGetStaticModuleState());<br />
<br />
CWnd *pParent = CWnd::FromHandle (hWnd);<br />
g_pDialog1 = new CDialog1 ( pParent );<br />
g_pDialog1->Create ( IDD_DIALOG_1, pParent );<br />
g_pDialog1->ShowWindow ( SW_SHOW );<br />
}
There is only one ListCtrl on the dialog. And when a user doubleclicks on the ListCtrl, thete will be shonw a ExEditBox (inherited from CEditBox)
The TestApplication (Dialog based) calls StartTest:
StartTest ( this->m_hWnd );
The strange is, that when i press ENTER in the pop-up EditBox my TestApplication closes (i'm tring to catch WM_KEYDOWN in ExEditBox's PreTranslateMessage, but there are no messages and all messages are going to the TestApplication). Do you know why?
And it word exelent, if i'd make the same without DLL.
|
|
|
|
|
Hi,
The problem is not in the dll. It is a CEdit standard behavior;
when the focus is in a editbox and enter key is pressed, the dialog will call CDialog::OnOk method and close itself. The overcome that, you do the following:
* Override CDialog::OnOk method. So, you have:
void CMyDialog::OnOk()
{
CDialog::OnOk(); // default behavior
}
* Remove the call of baseclass's OnOk so that you have a dummy CMyDialog::OnOk
method.
* Now, the problem is overcome.
But if you have a button with IDOK handle on the dialog box, you need to change its id (say IDC_OK) and create a handler for that IDC_OK. So, you can
put CDialog::OnOk call in that handler.
--
======
Arman
|
|
|
|
|
I can't attach the project to this thread...
But my problem is not OnOK.
As i told above PreTranslateMessage of ExEdit does not receive any messages.
Sure i could get OnOK in main programm, then ignore it and send a user message to dll ( to child dialog ), so that the child dialog will hide this editbox. But i don't it is a good solution.
|
|
|
|
|
Fester_1977 wrote: Sure i could get OnOK in main programm, then ignore it and send a user message to dll ( to child dialog ), so that the child dialog will hide this editbox. But i don't it is a good solution.
Just a suggestion, don’t know if it will work or not but try DoModal() instead of creating a modeless window.
DEBUGGING : Removing the needles from the haystack.
|
|
|
|
|
How a text can be displayed in the language set in the Local.
anil
|
|
|
|
|
You need to first retrieve the local language set on the machine, and also provide strings in your string table for each language you want your app, and then load the according strings from your string table.
~RaGE();
|
|
|
|
|
Hi guys,
I need help.
Can you tell me how to know what are the ports that are currrently being occupied by a particular application.
I am writing an application which would tell the user what are the ports being occupied by an application.
Owner Drawn
--Nothing special
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
