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  XtMalloc(3Xt)    X Version 11 (1 September 1988)    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


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  XtMalloc(3Xt)    X Version 11 (1 September 1988)    XtMalloc(3Xt)



       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
       initializes the space to zero.  If there is insufficient
       memory 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 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 convenience
       macro that calls XtMalloc with the following arguments
       specified:

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

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




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