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+---- Forum: 6.11 Pointer Type Conversions (https://forum.misra.org.uk/forumdisplay.php?fid=38)
+---- Thread: Pointer to void (/showthread.php?tid=272)
Pointer to void - fwamolina - 14-06-2006
I just want to know when a cast shall be performed between a pointer to void and any type or vice versa?
for example is this code compliance with misra-c?
void* GetNewObject (void);
void SetProperty (void*, uint8_t);
void main (void)
{
void* lpVoid;
OBJECT_T* lpObject;
lpVoid = NULL;
lpObject = NULL;
lpObject = GetNewObject ();
/* there is an explicit cast in
this function from OBJECT_T*
type to void* type, so GetNewObject
return an OBJECT_T* qualifier type */
lpVoid = lpObject;
SetProperty (lpVoid, 4U);
lpObject = lpVoid;
if (lpObject == lpVoid)
{
SetProperty (lpObject, 5U);
}
lpVoid = lpObject;
}
also have other case - fwamolina - 15-06-2006
void UseObject (lpVoid*);
void main (void)
{
OBJECT01_T* lpObject01;
OBJECT02_T* lpObject02;
void* lpVoid;
lpVoid = lpObject01;
UseObject (lpVoid);
/* lpVoid is a void* type here or a OBJECT01_T* type? */
lpVoid = lpObject02;
UseObject (lpVoid);
}
- misra-c - 09-05-2007
This is compliant. See ISO 6.2.2.3