DOCERR: Setdflag.c Sample for _CrtSetDbgFlag Missing Tilde (~)

Last reviewed: September 26, 1997
Article ID: Q142420

The information in this article applies to:

The C Run-time (CRT) included with: Microsoft Visual C++, 32-bit Edition, version 4.0, 4.1, 4.2, 5.0

SUMMARY

The Setdflag.c sample program in the Help under _CrtSetDbgFlag(), contains the following section of code which is missing a tilde (~) character:

  /*
  * Set the debug-heap flag to no longer keep freed blocks in the
  * heap's linked list and turn on Debug type allocations (CLIENT)
  */
   tmpDbgFlag = _CrtSetDbgFlag(_CRTDBG_REPORT_FLAG);
   tmpDbgFlag |= _CRTDBG_ALLOC_MEM_DF;
   tmpDbgFlag &= _CRTDBG_DELAY_FREE_MEM_DF;  // This line is wrong
   _CrtSetDbgFlag(tmpDbgFlag);

The third line of code should be:

   tmpDbgFlag &= ~_CRTDBG_DELAY_FREE_MEM_DF;

MORE INFORMATION

To disable a flag with the _CrtSetDbgFlag() function, you should AND the variable with the bitwise NOT of the bitmask.

Additional query words: vcbuglist400
Keywords : CRTIss
Version : WinNT:4.0,4.1,4.2,5.0
Platform : NT WINDOWS
Issue type : kbdocerr

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Last reviewed: September 26, 1997
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