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XtMalloc(3Xt)                 X11 SDE 5.4R3.00                 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 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.



Licensed material--property of copyright holder(s)                         1

XtMalloc(3Xt)                 X11 SDE 5.4R3.00                 XtMalloc(3Xt)


       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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