Re: Shared memory - C / C++ / MFC Discussion Boards

Re: Configuration problem ...

Radu Sorin16-May-06 3:00

Radu Sorin

16-May-06 3:00

just now ... thanks

Context Menu Extensions

Anil_vvs16-May-06 1:00

Anil_vvs

16-May-06 1:00

Hi all,

I have implemented Context Menu Extension on my namespace icon by implementing IContextMenu inteface. I have added 5 custom menus. This works fine for Win2k but I only see the first of this menus if I test it on Win XP. Can anyone tell me what is going wrong here?

Thanks and Regards,
Anil

Re: Context Menu Extensions

ThatsAlok16-May-06 1:28

ThatsAlok

16-May-06 1:28

Anil_vvs wrote:
This works fine for Win2k but I only see the first of this menus if I test it on Win XP. Can anyone tell me what is going wrong here?

Buddy, that impossible to tell witout seeing you source code!

"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

Re: Context Menu Extensions

Anil_vvs16-May-06 2:08

Anil_vvs

16-May-06 2:08

What I am doing is fairly straightforward.. inside the QueryContextMenu function of my implementation of IContextMenu interface I am passed the menu handle of the context menu thats displayed....I am calling InsertMenuItem with the passed menu handle and each of my menu Items....

I was wondering if there is a registry entry or something of that sort that has to be changed so that we get to see all the menus...

Re: Context Menu Extensions

Michael Dunn16-May-06 7:35

Michael Dunn

16-May-06 7:35

Post your code

--Mike--
Visual C++ MVP Cool | :cool:

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Re: Context Menu Extensions

Anil_vvs16-May-06 19:11

Anil_vvs

16-May-06 19:11

STDMETHODIMP MxSNEShellFolder::QueryContextMenu(HMENU hMenu, UINT uiIndexMenu, UINT idCmdFirst, UINT idCmdLast, UINT uFlags)
{
AFX_MANAGE_STATE(AfxGetStaticModuleState())

m_hMenu = hMenu;
m_idCmdFirst = uiIndexMenu;
m_id = idCmdFirst;
if (CMF_DEFAULTONLY & uFlags)
return MAKE_HRESULT(SEVERITY_SUCCESS,FACILITY_NULL,0);
int i = uiIndexMenu;
MxSNECmdMgr cmdMgr;
try
{
if(!cmdMgr.IsConnectedFromShell())
{

MENUITEMINFO mii = { 0 };

mii.cbSize = sizeof(MENUITEMINFO);
mii.fMask = MIIM_ID | MIIM_TYPE | MIIM_STATE;
mii.wID = idCmdFirst + ID_CONNECT;
mii.fType = MFT_STRING;
mii.dwTypeData = _T("Menu1");
mii.fState = MFS_ENABLED;
InsertMenuItem(hMenu, uiIndexMenu++, TRUE, &mii);

mii.cbSize = sizeof(MENUITEMINFO);
mii.fMask = MIIM_ID | MIIM_TYPE | MIIM_STATE;
mii.wID = idCmdFirst + ID_SEARCH;
mii.fType = MFT_STRING;
mii.dwTypeData = _T("Menu2");
mii.fState = MFS_DISABLED;
InsertMenuItem(hMenu, uiIndexMenu++, TRUE, &mii);

mii.cbSize = sizeof(MENUITEMINFO);
mii.fMask = MIIM_ID | MIIM_TYPE | MIIM_STATE;
mii.wID = idCmdFirst + ID_CREATEUSINGTEMPLATE;
mii.fType = MFT_STRING;
mii.dwTypeData = _T("Menu3");
mii.fState = MFS_DISABLED;
InsertMenuItem(hMenu, uiIndexMenu++, TRUE, &mii);

mii.cbSize = sizeof(MENUITEMINFO);
mii.fMask = MIIM_ID | MIIM_TYPE | MIIM_STATE;
mii.wID = idCmdFirst + ID_DISCONNECT;
mii.fType = MFT_STRING;
mii.dwTypeData = _T("Menu4");
mii.fState = MFS_DISABLED;
InsertMenuItem(hMenu, uiIndexMenu++, TRUE, &mii);

mii.cbSize = sizeof(MENUITEMINFO);
mii.fMask = MIIM_ID | MIIM_TYPE | MIIM_STATE;
mii.wID = idCmdFirst + ID_ABOUT;
mii.fType = MFT_STRING;
mii.dwTypeData = _T("Menu5");
mii.fState = MFS_ENABLED;
InsertMenuItem(hMenu, uiIndexMenu++, TRUE, &mii);
}

catch(...)
{
}

return MAKE_HRESULT(SEVERITY_SUCCESS, 0, USHORT(i-uiIndexMenu));
}

Shared memory

voorugonda prashanth16-May-06 0:59

voorugonda prashanth

16-May-06 0:59

what is shared memory ??

Thanks in advance.

Regards,
Prashanth.v

Re: Shared memory

_AnsHUMAN_ 16-May-06 1:09

_AnsHUMAN_

16-May-06 1:09

The area that is shared between two or more processes is called Shared Memory.This helps in the interprocess communication where you want to allow changes made in all the instances of a single application .

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: Shared memory

Stephen Hewitt16-May-06 1:10

Stephen Hewitt

16-May-06 1:10

Normally each process has its own memory and data in processes A's memory can't be accessed in the memory of process B and vice versa. Shared memory is when the same physical memory is mapped into multiple processes. In our example this means that process A and B share some memory and thus the data in it is shared. Normally only a small amount of memory will be shared.

Steve

Re: Shared memory

VinayCool16-May-06 1:13

VinayCool

16-May-06 1:13

Hi Prashanth V,

Hw are u ??

Shared Memory is an efficeint means of passing data between programs. One program will create a memory portion which other processes (if permitted) can access.

Re: Shared memory

voorugonda prashanth16-May-06 1:19

voorugonda prashanth

16-May-06 1:19

ya, i'm fine.
how abt u vinay??

Re: Shared memory

VinayCool16-May-06 1:22

VinayCool

16-May-06 1:22

ya prashanth, if u fine i am also fine ....

take care bye ..happy coding..........

Re: Shared memory

ThatsAlok16-May-06 1:37

ThatsAlok

16-May-06 1:37

vinaycool wrote:
ya prashanth, if u fine i am also fine ....take care bye ..happy coding..........

Can i join the party?!

"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

Re: Shared memory

VinayCool16-May-06 1:41

VinayCool

16-May-06 1:41

Yes Alok Gupta ....U are welcome to party ...;)

Re: Shared memory

ThatsAlok16-May-06 1:27

ThatsAlok

16-May-06 1:27

http://www.codeproject.com/threads/loop_buffer_-_Linux_versi.asp
http://www.codeproject.com/threads/sm.asp
http://www.codeproject.com/threads/SharedMemory_IPC_Threads.asp

"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

Re: Shared memory

Sarath C16-May-06 2:07

Sarath C

16-May-06 2:07

i have nothing more than others to say about shared memory

See the below articles

http://www.codeproject.com/threads/SharedMemory_IPC_Threads.asp

http://www.garret.ru/~knizhnik/shmem/Readme.htm

-Sarath

Re: Shared memory

ThatsAlok16-May-06 2:18

ThatsAlok

16-May-06 2:18

Sarath C wrote:
See the below articles

First Link of yours match with third link of mine Smile | :)

"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

???

Eytukan16-May-06 0:39

Eytukan

16-May-06 0:39

There used to be a C function that any programmer could use for allocating memory off the stack. The memory was automatically deallocated when the calling function returned. This was a dangerous function to call. it’s not available anymore.

What is he possibly talking about?? Unsure | :~

AnyIdea?

he=A C programmer.

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[My Current Status]

Re: ???

Nemanja Trifunovic16-May-06 0:44

Nemanja Trifunovic

16-May-06 0:44

alloca[^]

My programming blahblahblah blog. If you ever find anything useful here, please let me know to remove it.

Re: ???

Eytukan16-May-06 0:58

Eytukan

16-May-06 0:58

Got it.Thanks !! Beer | [beer]

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Re: ???

ThatsAlok16-May-06 1:31

ThatsAlok

16-May-06 1:31

VuNic wrote:
Got it.Thanks !!

Is the coding in C itself or you can use C++ Classes there, if yes the try Auto_ptr Smile | :)

"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

Re: ???

Eytukan16-May-06 1:38

Eytukan

16-May-06 1:38

Thanks Alok!

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Re: ???

Laxman Auti16-May-06 0:53

Laxman Auti

16-May-06 0:53

The memory is deallocated automatically when program terminates

In case of java there is special garbage collecter for deallocation of the memory during run time

So its better that when you allocates memory inside the function then before returning allocated memory must deallocate. Smile | :)

Knock out 'T' from CAN'T ,
You 'CAN' if you think you 'CAN'
Cool | :cool:

Re: ???

Nibu babu thomas16-May-06 0:54

Nibu babu thomas

16-May-06 0:54

A_Laxman wrote:
The memory is deallocated automatically when program terminates

A_Laxman wrote:
So its better that when you allocates memory inside the function then before returning allocated memory must deallocate.

alloca doesn't require that.

Nibu thomas
Software Developer

Faqs by Michael dunn

Re: ???

ThatsAlok16-May-06 1:20

ThatsAlok

16-May-06 1:20

A_Laxman wrote:
In case of java there is special garbage collecter for deallocation of the memory during run time

Sorry for Sounding Rude, this is not JAVA forum and C++ doesn't have Inbuild Garbage Collector!

A_Laxman wrote:
So its better that when you allocates memory inside the function then before returning allocated memory must deallocate.

Sometime its necessaey to allocate the Memory inside Function and Deallocated at Calling side, its wholly on design!.

"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

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