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XtMalloc(3Xt)		   XT FUNCTIONS		    XtMalloc(3Xt)


NAME
       XtMalloc, XtCalloc, XtRealloc, XtFree, XtNew, XtNewString
       - memory management functions

SYNTAX
       char *XtMalloc(size);
	     Cardinal size;

       char *XtCalloc(num, size);
	     Cardinal num;
	     Cardinal size;

       char *XtRealloc(ptr, num);
	     char *ptr;
	     Cardinal num;

       void XtFree(ptr);
	     char *ptr;

       type *XtNew(type);
	     type;

       String XtNewString(string);
	     String string;

ARGUMENTS
       num	 Specifies the number of bytes or array elements.

       ptr	 Specifies a pointer to the old storage or to the
		 block of storage that is to be freed.

       size	 Specifies the size of an array element (in
		 bytes) or the number of bytes desired.

       string	 Specifies a previously declared string.

       type	 Specifies a previously declared data type.

DESCRIPTION
       The XtMalloc functions returns a pointer to a block of
       storage of at least the specified size bytes.  If there is
       insufficient memory to allocate the new block, XtMalloc
       calls XtErrorMsg.

       The XtCalloc function allocates space for the specified
       number of array elements of the specified size and ini
       tializes the space to zero.  If there is insufficient mem
       ory to allocate the new block, XtCalloc calls XtErrorMsg.

       The XtRealloc function changes the size of a block of
       storage (possibly moving it).  Then, it copies the old
       contents (or as much as will fit) into the new block and
       frees the old block.  If there is insufficient memory to
       allocate the new block, XtRealloc calls XtErrorMsg.  If



X Version 11		   Release 6.1				1





XtMalloc(3Xt)		   XT FUNCTIONS		    XtMalloc(3Xt)


       ptr is NULL, XtRealloc allocates the new storage without
       copying the old contents; that is, it simply calls
       XtMalloc.

       The XtFree function returns storage and allows it to be
       reused.	If ptr is NULL, XtFree returns immediately.

       XtNew returns a pointer to the allocated storage.  If
       there is insufficient memory to allocate the new block,
       XtNew calls XtErrorMsg.	XtNew is a convenience macro that
       calls XtMalloc with the following arguments specified:

       ((type *) XtMalloc((unsigned) sizeof(type))

       XtNewString returns a pointer to the allocated storage.
       If there is insufficient memory to allocate the new block,
       XtNewString calls XtErrorMsg.  XtNewString is a conve
       nience macro that calls XtMalloc with the following argu
       ments specified:

       (strcpy(XtMalloc((unsigned) strlen(str) + 1), str))

SEE ALSO
       X Toolkit Intrinsics - C Language Interface
       Xlib - C Language X Interface
































X Version 11		   Release 6.1				2


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