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Mathieu
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 Posted: Wed Feb 16, 2005 11:13 am Post subject: Re: Shared Memory in a DLL (C++Builder 5.0) |
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"Remy Lebeau (TeamB)" <no.spam (AT) no (DOT) spam.com> wrote:
| Quote: |
"Mathieu" <kirck (AT) enterprise (DOT) com> wrote in message
news:4211f77b (AT) newsgroups (DOT) borland.com...
Does anybody know how to share memory in a DLL with C++Builder 5.0 ?
BCB does not support shared segments. You need to allocate your own shared
memory manually via the Win32 API CreateFileMapping() and MapViewOfFile()
functions.
Gambit
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Great ! it's work !
Thank you.
Regards,
Mathieu
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Thomas
Guest
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| Posted: Wed Feb 16, 2005 11:28 am Post subject: Re: Shared Memory in a DLL (C++Builder 5.0) |
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In C++ Builder 6.0 it is possible to create shared data segments in a DLL. I use it for a Windows
Hook procedure. I have my test software in 2 versions. The first one is made with VC++6.0 and I use
the way you described
| Quote: | A have read that for MSVC++ the right method is to use #pragma like this :
#pragma data_seg("SHARED")
int MyInt;
#pragma data_seg()
#pragma comment(linker, "/SECTION:SHARED,RWS")
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In C++ Builder 6.0 I use the way you described too:
| Quote: | Then, I have found that for C++Builder4.0 the right method is to use #pragma like this :
#pragma option -zRSHSEG // change default data segment name
#pragma option -zTSHCLASS // change default data class name
int MyInt;
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It is important the shared data are in a seperate file. Check out this:
http://bdn.borland.com/article/0,1410,20132,00.html
If you make your DLL with the shared data in the way the technical note shows this you will have your
DLL with a shared data segment. I have not check if this way works with BCB5, but it works with BCB4
and I did it with BCB6.
Regards Thomas
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Thomas
Guest
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| Posted: Wed Feb 16, 2005 11:31 am Post subject: Re: Shared Memory in a DLL (C++Builder 5.0) |
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"Remy Lebeau (TeamB)" <no.spam (AT) no (DOT) spam.com> wrote:
| Quote: | BCB does not support shared segments.
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That is not correct! Try to make it this way and it works with BCB6  I did it for a Windows Hook procedure...
http://bdn.borland.com/article/0,1410,20132,00.html
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Mathieu
Guest
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| Posted: Wed Feb 16, 2005 1:33 pm Post subject: Re: Shared Memory in a DLL (C++Builder 5.0) |
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"Thomas" <no (AT) mail (DOT) com> wrote:
| Quote: |
In C++ Builder 6.0 it is possible to create shared data segments in a DLL. I use it for a Windows
Hook procedure. I have my test software in 2 versions. The first one is made with VC++6.0 and I use
the way you described
A have read that for MSVC++ the right method is to use #pragma like this :
#pragma data_seg("SHARED")
int MyInt;
#pragma data_seg()
#pragma comment(linker, "/SECTION:SHARED,RWS")
In C++ Builder 6.0 I use the way you described too:
Then, I have found that for C++Builder4.0 the right method is to use #pragma like this :
#pragma option -zRSHSEG // change default data segment name
#pragma option -zTSHCLASS // change default data class name
int MyInt;
It is important the shared data are in a seperate file. Check out this:
http://bdn.borland.com/article/0,1410,20132,00.html
If you make your DLL with the shared data in the way the technical note shows this you will have your
DLL with a shared data segment. I have not check if this way works with BCB5, but it works with BCB4
and I did it with BCB6.
Regards Thomas
|
Hi All,
In the first case the compiler give the error "W8094".
In the second case he compiler give the error "E2075", and it's true that I was not able to found any help on the #pragma option -zT / -zR.
Now I use the CreateFileMapping() method and it works fine.
Regards,
Mathieu
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sales@simplesector.com
Guest
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| Posted: Sat Feb 18, 2006 9:03 pm Post subject: Re: DCOM & NT services |
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ProgServed will run any program as a Windows Service and much simpler
to use than srvany. It is worth the $10.99. Go to
www.simplesector.com/ProgServed1_1 |
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bogon
Guest
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| Posted: Wed Apr 19, 2006 8:03 pm Post subject: Re: SHGetFolderPath generates errors in header file |
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Kris wrote:
| Quote: | I managed to solve my problem...
#define NO_WIN32_LEAN_AND_MEAN
#include "shlobj.h"
Didn't work.
Then I went to project options / path & defines / conditional defines
and added NO_WIN32_LEAN_AND_MEAN to it instead of using a #define in
the header file.
This solved the compilation problems.
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ok, so my reading's months late but for the sake of search engines
everywhere... From my recollection of past news items, I believe it's
#pragma instead of #define. However, for the life of me, I have *no*
idea what the difference. One of these days, I'll get to that level of
programming. ciao.
----------> signature = 6 lines follows <--------------
Neil Duffee, Joe SysProg, U d'Ottawa, Ottawa, Ont, Canada
telephone:1 613 562 5800 x4585 fax:1 613 562 5161
mailto:NDuffee of uOttawa.ca http:/ /aix1.uottawa.ca/ ~nduffee
"How *do* you plan for something like that?" Guardian Bob, Reboot
"For every action, there is an equal and opposite criticism."
"Systems Programming: Guilty, until proven innocent" John Norgauer 2004 |
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Remy Lebeau (TeamB)
Guest
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| Posted: Wed Apr 19, 2006 9:03 pm Post subject: Re: SHGetFolderPath generates errors in header file |
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"bogon" <foo@bar> wrote in message news:44469004 (AT) newsgroups (DOT) borland.com...
| Quote: | From my recollection of past news items, I believeit's #pragma instead of
#define. |
That is not correct.
| Quote: | However, for the life of me, I have *no* idea what the difference.
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#pragma issues commands to the preprocessor, such as adding additional
command-line parameters when calling the compiler after processing is
finished.
#define declares a value or macro that the preprocessor uses while
processing the code.
Gambit |
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