BUG: _DBReplace() in LCK Leaks MemoryID: Q107405 The information in this article applies to:
SYMPTOMSIn the FoxPro Library Construction Kit, if you use the _DBReplace() function to replace information into a character field in a database, memory will slowly be lost. STATUSMicrosoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article. MORE INFORMATIONSteps to Reproduce ProblemThe following code can be used to reproduce the problem. The SYS(1016) value will change approximately every 200-400 calls to the library. It will change by values around 2 kilobytes each time. There is currently no known workaround. * FoxPro Code
CLOSE ALL
CLEAR ALL
x = "a"
CREATE TABLE lcktest (tstfield c(25))
APPEND BLANK
SET LIBRARY TO test.dll
FOR i=1 TO 10000
?SYS(1016),i
=myplbfunc(REPLICATE( X ,10))
ENDFOR
// LCK 'C' Code test.c
#include <pro_ext.h>
void FAR Generic(ParamBlk FAR *parm)
{
Value myval;
Locator DbfFldLoc;
// Locate field named 'tstfield'
if ((DbfFldLoc.l_NTI = _NameTableIndex("tstfield")) == -1)
_UserError("Failed at _NameTableIndex call.");
// Find the field in the database, and store location to Locator
// structure
if (_FindVar(DbfFldLoc.l_NTI, 1, &DbfFldLoc) == 0)
_UserError("Failed at _FindVar call.");
// Replace character field with information from passed in variable
_DBReplace(&DbfFldLoc,&parm->p[0].val);
}
FoxInfo myFoxInfo[] = {
{"MYPLBFUNC", (FPFI) Generic, 1, "C"},
};
FoxTable _FoxTable = {
(FoxTable FAR *) 0, sizeof(myFoxInfo)/sizeof(FoxInfo), myFoxInfo
};
Additional reference words: FoxWin FoxDos 2.50 2.50a 2.50b 2.60 2.60a buglist2.50 buglist2.50a buglist2.50b buglist2.60 buglist2.60a LCK API KBCategory: kbtool kbenv kbbuglist KBSubcategory: FxtoolLck |
Last Reviewed: September 26, 1995 |
