When linking to Xerces-C, you must make sure you are linking with the same
runtime library that the Xerces-C DLL links with. The Xerces-C DLL links to
the multithreaded DLL version of the runtime library by default. To use the
Xerces-C DLL as it ships, your program must link to the multithreaded DLL
version of the runtime library as well.
Visual C++ provides three versions of the runtime libraries: multithreaded
DLL, multithreaded static, singlethreaded static. If your program cannot be
linked to the multithreaded DLL runtime library, then it must be linking to
one of the two static libraries. You cannot simply rebuild the Xerces-C DLL
to link with the same static library as your program. This is because DLL's
are seperately linkable units (the same as executables). Even though both
your program and Xerces-C would be linking to the same static runtime
library, each would maintain its own heap. It would be illegal for the
memory returned by Xerces-C to be deleted by your program.
The way around this is to recompile Xerces-C as a statically linked library
(create a new project of type "Static Library" in Visual C++). Link your
program to the static library version of Xerces-C and everything should work
fine. The static library version of Xerces-C will now actually be part of
your program and hence share the same heap with it.
I hope this helps,
Ray
-----Original Message-----
From: Bruce Bailey [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, June 13, 2001 2:25 PM
To: 'Xerces List'
Subject: Correct Way to dispose of strings from XMLString::transcode
Hi
When trying to run the following program, I keep getting an invalid heap
pointer error. This occurs whenever I try to delete either the XML string
or the normal string. If I don't use 'delete', I get memory leaks. Any
ideas as to what might be the problem?
Thanks.
Bruce
Platform: Winnt 4.0 (not sure of sp level, but I think it's 5)
Compiler: vc 6.0
Xerces version: VER=1_4
#include <util\XMLString.hpp>
#include <util/PlatformUtils.hpp>
int
main(int argc, char *argv[])
{
XMLPlatformUtils::Initialize();
XMLCh *x = XMLString::transcode("This is a test");
char *p = XMLString::transcode(x);
delete x; /* delete[] x doesn't work either*/
delete[]p;
XMLPlatformUtils::Terminate();
return 0;
}
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