RE: debug assertion error in threads of c++ under windows
"Pushpa" wrote:
Hi All,
This my part of the c++ program using threads in windows :
//modified by pushpa
struct structExrdDoc
{
CExrdDoc* spDoc;
LPCTSTR sstrFileName;
structExrdDoc():spDoc(NULL),sstrFileName(""){}
};
structExrdDoc sp;
volatile bool running;
UINT CExcelExport::run(LPVOID p)
{
CExrdDoc* me = sp.spDoc;
me->OnSaveDocument ((LPCTSTR)sp.sstrFileName);
running = FALSE;
return 0;
}
//modified by pushpa
void CExcelExport::SaveExcelFile (CExrdDoc* pDoc, const string&
strFileName)
{
sp.spDoc = pDoc; //modified by pushpa
sp.sstrFileName = strFileName.c_str(); //modified by pushpa
running = TRUE; //modified by pushpa
AfxBeginThread(run,NULL); //modified by pushpa
//pDoc->OnSaveDocument (strFileName.c_str()); //modified by pushpa
}
Here the line of code I have commented was taking lot of time, so I hv
tried to use threads and I am new to this.
This is the declaration in the .h file
static UINT CExcelExport::run(LPVOID p);
After some struggle I could compile the application, but when it is
run I am getting a Debug assertion error.
debug assertion failed!
program:d:\amsa\amsa\bin\gageanalysisdlld.exe
file:wincore.cpp
line:888
for information on how your program can cause an assertion failure,
see the visual c++ documentation on asserts.
Could you please help me with this.
Thanking you in advance,
Pushpa.
Probably the string where the strFileName reference parameter was referring
to went out of scope while (or before) your thread was running.
If that happened, sstrFileName in this line points to invalid memory:
me->OnSaveDocument ((LPCTSTR)sp.sstrFileName);
Making sstrFileName a string or CString in stead of LPCTSTR will fix this.
Also you're mixing string with LPCTSTR which won't work if you compile for
UNICODE.
Wim
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