_tempnam_dbg, _wtempnam_dbg
Function versions of _tempnam, _wtempnam, tmpnam, _wtmpnam that use the debug version of malloc, _malloc_dbg.
char *_tempnam_dbg(
const char *dir,
const char *prefix,
int blockType,
const char *filename,
int linenumber
);
wchar_t *_wtempnam_dbg(
const wchar_t *dir,
const wchar_t *prefix,
int blockType,
const char *filename,
int linenumber
);
Parameters
dir
The path used in the file name if there is no TMP environment variable, or if TMP is not a valid directory.prefix
The string that will be pre-pended to names returned by _tempnam.blockType
Requested type of memory block: _CLIENT_BLOCKor _NORMAL_BLOCK.filename
Pointer to name of source file that requested allocation operation or NULL.linenumber
Line number in source file where allocation operation was requested or NULL.
Return Value
Each function returns a pointer to the name generated or NULL if there is a failure. Failure can occur if there is an invalid directory name specified in the TMP environment variable and in the dir parameter.
Nota
free (or free_dbg) does need to be called for pointers allocated by _tempnam_dbg and _wtempnam_dbg.
Remarks
The _tempnam_dbgand _wtempnam_dbgfunctions are identical to _tempnamand _wtempnamexcept that, when _DEBUGis defined, these functions use the debug version of malloc and _malloc_dbg, to allocate memory if NULL is passed as the first parameter. For more information, see _malloc_dbg.
You do not need to call these functions explicitly in most cases. Instead, you can define the flag _CRTDBG_MAP_ALLOC. When _CRTDBG_MAP_ALLOC is defined, calls to _tempnam and _wtempnam are remapped to _tempnam_dbg and _wtempnam_dbg, respectively, with the blockType set to _NORMAL_BLOCK. Thus, you do not need to call these functions explicitly unless you want to mark the heap blocks as _CLIENT_BLOCK. For more information, see Types of Blocks on the Debug Heap.
Generic-Text Routine Mappings
TCHAR.H routine |
_UNICODE & _MBCS not defined |
_MBCS defined |
_UNICODE defined |
|---|---|---|---|
_ttempnam_dbg |
_tempnam_dbg |
_tempnam_dbg |
_wtempnam_dbg |
Requirements
Routine |
Required header |
|---|---|
_tempnam_dbg, _wtempnam_dbg |
<crtdbg.h> |
For additional compatibility information, see Compatibility in the Introduction.
.NET Framework Equivalent
Not applicable. To call the standard C function, use PInvoke. For more information, see Platform Invoke Examples.