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Conference bulova::decw_jan-89_to_nov-90

Title:	DECWINDOWS 26-JAN-89 to 29-NOV-90
Notice:	See 1639.0 for VMS V5.3 kit; 2043.0 for 5.4 IFT kit
Moderator:	STAR::VATNE

Created:	Mon Oct 30 1989
Last Modified:	Mon Dec 31 1990
Last Successful Update:	Fri Jun 06 1997
Number of topics:	3726
Total number of notes:	19516

839.0. "XtCalloc and pointer alignment?" by 21850::WEAVER (Laboratory Data Products/Science) Wed May 24 1989 14:22

    Does XtCalloc setup proper pointer alignment on the PMAX?  Running
    lint I get the following warning:
    
    warning: possible pointer alignment problem
        (47)            (589)           (860)
    
    In 2 cases I doing the equivalent of:
    
        ptr = (Mytype *) XtCalloc (1,sizeof(Mytype));
    
    and the 3rd I am simply doing:
    
        ptr = (unsigned int *) XtCalloc (n,sizeof(unsigned int));
    
    Also, is there some reason the X Toolkit deviated from ANSI C
    in defining all the Xt*Alloc routines as "char *" rather than
    "void *", forcing one to typecast?
    
    						-Dave

T.R	Title	User	Personal Name	Date	Lines
839.1	Yes, its ok.	56579::thomas	The Code Warrior	`Wed May 24 1989 15:48`	4
	The problem happens to be with the definition of XtCalloc. Since it is defined as a char * and you are casting to a type which has a different alignement, lint gives you the error.