XkbFreeServerMap(3) XKB FUNCTIONS 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;
X Version 11 libX11 1.8.10 XkbFreeServerMap(3)