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XtMalloc(3)                                     XT FUNCTIONS                                     XtMalloc(3)



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

SYNTAX
       char *XtMalloc(Cardinal size);

       char *XtCalloc(Cardinal num, Cardinal size);

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

       void XtFree(char *ptr);

       type *XtNew(type);

       String XtNewString(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.

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

       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 follow-ing following
       ing 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



X Version 11                                     libXt 1.0.5                                     XtMalloc(3)