XkbFreeServerMap(3)
NAME
XkbFreeServerMap - Free memory used by the server member of an XkbDescRec structure
SYNOPSIS
void XkbFreeServerMap (XkbDescPtr xkb, unsigned int which, Bool
free_all);
ARGUMENTS
- xkb keyboard description containing server map to free
- which
mask identifying components of map to free
- free_all
True => free all server map components and server itself
DESCRIPTION
The XkbFreeServerMap function frees the specified components of server
map in the XkbDescRec structure specified by the xkb parameter and sets
the corresponding structure component values to NULL. The which
parameter specifies a combination of the server map masks and is a
bitwise inclusive OR of the masks listed in Table 1. If free_all is
True, which is ignored and XkbFreeServerMap frees every non-NULL
structure component in the server map, frees the XkbServerMapRec
structure referenced by the server member of the xkb parameter, and
sets the server member to NULL.
Table 1 XkbAllocServerMap Masks
Mask Effect
XkbExplicitComponentsMask The min_key_code and max_key_code fields
of the xkb parameter are used to
allocate the explicit field of the
server map.
XkbKeyActionsMask The min_key_code and max_key_code fields
of the xkb parameter are used to
allocate the key_acts field of the
server map. The count_acts parameter is
used to allocate the acts field of the
server map.
XkbKeyBehaviorsMask The min_key_code and max_key_code fields
of the xkb parameter are used to
allocate the behaviors field of the
server map.
XkbVirtualModMapMask The min_key_code and max_key_code fields
of the xkb parameter are used to
allocate the vmodmap field of the server
map.
STRUCTURES
The complete description of an Xkb keyboard is given by an XkbDescRec.
The component structures in the XkbDescRec represent the major Xkb
components.
typedef struct {
struct _XDisplay * display; / connection to X server */
unsigned short flags; / private to Xkb, do not modify */
unsigned short device_spec; / device of interest */
KeyCode min_key_code; / minimum keycode for device */
KeyCode max_key_code; / maximum keycode for device */
XkbControlsPtr ctrls; / controls */
XkbServerMapPtr server; / server keymap */
XkbClientMapPtr map; / client keymap */
XkbIndicatorPtr indicators; / indicator map */
XkbNamesPtr names; / names for all components */
XkbCompatMapPtr compat; / compatibility map */
XkbGeometryPtr geom; / physical geometry of keyboard */
} XkbDescRec, *XkbDescPtr;
The display field points to an X display structure. The flags field is
private to the library: modifying flags may yield unpredictable
results. The device_spec field specifies the device identifier of the
keyboard input device, or XkbUseCoreKeyboard, which specifies the core
keyboard device. The min_key_code and max_key_code fields specify the
least and greatest keycode that can be returned by the keyboard.
Each structure component has a corresponding mask bit that is used in
function calls to indicate that the structure should be manipulated in
some manner, such as allocating it or freeing it. These masks and their
relationships to the fields in the XkbDescRec are shown in Table 2.
Table 2 Mask Bits for XkbDescRec
Mask Bit XkbDescRec Field Value
XkbControlsMask ctrls (1L<<0)
XkbServerMapMask server (1L<<1)
XkbIClientMapMask map (1L<<2)
XkbIndicatorMapMask indicators (1L<<3)
XkbNamesMask names (1L<<4)
XkbCompatMapMask compat (1L<<5)
XkbGeometryMask geom (1L<<6)
XkbAllComponentsMask All Fields (0x7f)
The Xkb server map contains the information the server needs to
interpret key events and is of type XkbServerMapRec:
#define XkbNumVirtualMods 16
typedef struct { / Server Map */
unsigned short num_acts; / # of occupied entries in acts */
unsigned short size_acts; / # of entries in acts */
XkbAction * acts; / linear 2d tables of key actions, 1 per keycode */
XkbBehavior * behaviors; / key behaviors,1 per keycode */
unsigned short * key_acts; / index into acts, 1 per keycode */
unsigned char * explicit; / explicit overrides of core remapping, 1 per key */
unsigned char vmods[XkbNumVirtualMods]; / real mods bound to virtual mods */
unsigned short * vmodmap; / virtual mods bound to key, 1 per keycode*/
} XkbServerMapRec, *XkbServerMapPtr;
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