Provided by: libx11-doc_1.8.7-1build1_all 
NAME
XkbAllocControls - Allocates an XkbControlsRec structure in the XkbDescRec
SYNOPSIS
Status XkbAllocControls (XkbDescPtr xkb, unsigned int which);
ARGUMENTS
xkb Xkb description in which to allocate ctrls rec
which mask of components of ctrls to allocate
DESCRIPTION
The need to allocate an XkbControlsRec structure seldom arises; Xkb creates one when an
application calls XkbGetControls or a related function. For those situations where there
is not an XkbControlsRec structure allocated in the XkbDescRec, allocate one by calling
XkbAllocControls.
XkbAllocControls allocates the ctrls field of the xkb parameter, initializes all fields to
zero, and returns Success. If the ctrls field is not NULL, XkbAllocControls simply returns
Success. If xkb is NULL, XkbAllocControls reports a BadMatch error. If the ctrls field
could not be allocated, it reports a BadAlloc error.
The which mask specifies the individual fields of the ctrls structure to be allocated and
can contain any of the valid masks defined in Table 1. (SHOULD THIS COMMENT BE LEFT
IN????) Because none of the currently existing controls have any structures associated
with them, which is currently of little practical value in this call.
Table 1 shows the actual values for the individual mask bits used to select controls for
modification and to enable and disable the control. Note that the same mask bit is used to
specify general modifications to the parameters used to configure the control (which), and
to enable and disable the control (enabled_ctrls). The anomalies in the table (no "ok" in
column) are for controls that have no configurable attributes; and for controls that are
not boolean controls and therefore cannot be enabled or disabled.
Table 1 Controls Mask Bits
───────────────────────────────────────────────────────────────────────────
Mask Bit which or enabled Value
changed_ctrls _ctrls
───────────────────────────────────────────────────────────────────────────
XkbRepeatKeysMask ok ok (1L<<0)
XkbSlowKeysMask ok ok (1L<<1)
XkbBounceKeysMask ok ok (1L<<2)
XkbStickyKeysMask ok ok (1L<<3)
XkbMouseKeysMask ok ok (1L<<4)
XkbMouseKeysAccelMask ok ok (1L<<5)
XkbAccessXKeysMask ok ok (1L<<6)
XkbAccessXTimeoutMask ok ok (1L<<7)
XkbAccessXFeedbackMask ok ok (1L<<8)
XkbAudibleBellMask ok (1L<<9)
XkbOverlay1Mask ok (1L<<10)
XkbOverlay2Mask ok (1L<<11)
XkbIgnoreGroupLockMask ok (1L<<12)
XkbGroupsWrapMask ok (1L<<27)
XkbInternalModsMask ok (1L<<28)
XkbIgnoreLockModsMask ok (1L<<29)
XkbPerKeyRepeatMask ok (1L<<30)
XkbControlsEnabledMask ok (1L<<31)
XkbAccessXOptionsMask ok ok (XkbStickyKeysMask |
XkbAccessXFeedbackMask)
XkbAllBooleanCtrlsMask ok (0x00001FFF)
XkbAllControlsMask ok (0xF8001FFF)
RETURN VALUES
SUCCESS allocates the ctrls field of the xkb parameter, initializes all fields to
zero
the ctrls field is not NULL
DIAGNOSTICS
BadAlloc Unable to allocate storage
BadMatch A compatible version of Xkb was not available in the server or an argument
has correct type and range, but is otherwise invalid
SEE ALSO
XkbGetControls(3)