CentOS 7.0 - man page for xkbfreekeyboard (centos section 3)

XkbFreeKeyboard(3)			  XKB FUNCTIONS 		       XkbFreeKeyboard(3)

NAME
       XkbFreeKeyboard -  Destroys either an entire XkbDescRec or just some of its members

SYNOPSIS
       void XkbFreeKeyboard (XkbDescPtr xkb, unsigned int which, Bool free_all);

ARGUMENTS
       xkb    keyboard description with components to free

       which  mask selecting components to free

       free_all
	      True => free all components and xkb

DESCRIPTION
       XkbFreeKeyboard	frees the components of xkb specified by which and sets the corresponding
       values to NULL. If free_all is True, XkbFreeKeyboard frees every non-NULL component of xkb
       and then frees the xkb structure itself.

X Version 11				   libX11 1.6.0 		       XkbFreeKeyboard(3)