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Xi: use fixed define for extenion base opcode 

Several places outside Xi (eg. dix, security hooks, ...) need to know the
actual XI base opcode. This formerly had been done by a global variable,
which is filled on XI init. This has some drawbacks, eg. requires that
XI really is initialized before anybody else attempting to access this
variable - changes in extension init order could be dangerous.

Since extension opcodes are now (compile-time) fixed for all known
extensions (including XI), this isn't needed anymore. We can really
rely on the XI extension always having the same opcode base. So we
can drop that variable entirely and use the corresponding define instead.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
This commit is contained in:
Enrico Weigelt, metux IT consult 2025-03-31 15:28:10 +02:00
parent c6eaca88cd
commit 86cf2c5ce3
7 changed files with 25 additions and 19 deletions
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1
Xi/exglobals.h
View File

@ -36,7 +36,6 @@ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#ifndef EXGLOBALS_H
#define EXGLOBALS_H 1
extern int IReqCode;
extern int IEventBase;
extern int BadDevice;
extern int BadMode;

10
Xi/extinit.c
View File

@ -53,6 +53,8 @@ SOFTWARE.
#include <dix-config.h>
#include <assert.h>
#include <X11/extensions/XI.h>
#include <X11/extensions/XIproto.h>
#include <X11/extensions/XI2proto.h>
@ -60,6 +62,7 @@ SOFTWARE.
#include "dix/dix_priv.h"
#include "dix/exevents_priv.h"
#include "dix/extension_priv.h"
#include "Xext/geext_priv.h"
#include "inputstr.h"
@ -321,7 +324,6 @@ static int (*SProcIVector[]) (ClientPtr) = {
*
*/
int IReqCode = 0;
int IEventBase = 0;
int BadDevice = 0;
static int BadEvent = 1;
@ -1029,7 +1031,6 @@ RestoreExtensionEvents(void)
{
int i, j;
IReqCode = 0;
IEventBase = 0;
for (i = 0; i < ExtEventIndex - 1; i++) {
@ -1230,7 +1231,8 @@ XInputExtensionInit(void)
extEntry = AddExtension(INAME, IEVENTS, IERRORS, ProcIDispatch,
SProcIDispatch, IResetProc, StandardMinorOpcode);
if (extEntry) {
IReqCode = extEntry->base;
assert(extEntry->base == EXTENSION_MAJOR_XINPUT);
IEventBase = extEntry->eventBase;
XIVersion = thisversion;
MakeDeviceTypeAtoms();
@ -1256,7 +1258,7 @@ XInputExtensionInit(void)
EventSwapVector[ChangeDeviceNotify] = SEventIDispatch;
EventSwapVector[DevicePresenceNotify] = SEventIDispatch;
GERegisterExtension(IReqCode, XI2EventSwap);
GERegisterExtension(EXTENSION_MAJOR_XINPUT, XI2EventSwap);
memset(&xi_all_devices, 0, sizeof(xi_all_devices));
memset(&xi_all_master_devices, 0, sizeof(xi_all_master_devices));

3
Xi/xichangehierarchy.c
View File

@ -40,6 +40,7 @@
#include "dix/dix_priv.h"
#include "dix/exevents_priv.h"
#include "dix/extension_priv.h"
#include "dix/input_priv.h"
#include "os/bug_priv.h"
@ -75,7 +76,7 @@ XISendDeviceHierarchyEvent(int flags[MAXDEVICES])
if (!ev)
return;
ev->type = GenericEvent;
ev->extension = IReqCode;
ev->extension = EXTENSION_MAJOR_XINPUT;
ev->evtype = XI_HierarchyChanged;
ev->time = GetTimeInMillis();
ev->flags = 0;

3
Xi/xiproperty.c
View File

@ -33,6 +33,7 @@
#include <X11/extensions/XI2proto.h>
#include "dix/exevents_priv.h"
#include "dix/extension_priv.h"
#include "dix/input_priv.h"
#include "dix.h"
@ -194,7 +195,7 @@ send_property_event(DeviceIntPtr dev, Atom property, int what)
};
xXIPropertyEvent xi2 = {
.type = GenericEvent,
.extension = IReqCode,
.extension = EXTENSION_MAJOR_XINPUT,
.length = 0,
.evtype = XI_PropertyEvent,
.deviceid = dev->id,

3
dix/enterleave.c
View File

@ -33,6 +33,7 @@
#include "dix/dix_priv.h"
#include "dix/eventconvert.h"
#include "dix/extension_priv.h"
#include "dix/input_priv.h"
#include "os/bug_priv.h"
@ -787,7 +788,7 @@ DeviceFocusEvent(DeviceIntPtr dev, int type, int mode, int detail,
return;
xi2event->type = GenericEvent;
xi2event->extension = IReqCode;
xi2event->extension = EXTENSION_MAJOR_XINPUT;
xi2event->evtype = type;
xi2event->length = bytes_to_int32(len - sizeof(xEvent));
xi2event->buttons_len = btlen;

15
dix/eventconvert.c
View File

@ -40,6 +40,7 @@
#include "dix/dix_priv.h"
#include "dix/eventconvert.h"
#include "dix/exevents_priv.h"
#include "dix/extension_priv.h"
#include "dix.h"
#include "inputstr.h"
@ -604,7 +605,7 @@ eventToDeviceChanged(DeviceChangedEvent *dce, xEvent **xi)
}
dcce->type = GenericEvent;
dcce->extension = IReqCode;
dcce->extension = EXTENSION_MAJOR_XINPUT;
dcce->evtype = XI_DeviceChanged;
dcce->time = dce->time;
dcce->deviceid = dce->deviceid;
@ -687,7 +688,7 @@ eventToDeviceEvent(DeviceEvent *ev, xEvent **xi)
return BadAlloc;
xde = (xXIDeviceEvent *) * xi;
xde->type = GenericEvent;
xde->extension = IReqCode;
xde->extension = EXTENSION_MAJOR_XINPUT;
xde->evtype = GetXI2Type(ev->type);
xde->time = ev->time;
xde->length = bytes_to_int32(len - sizeof(xEvent));
@ -757,7 +758,7 @@ eventToTouchOwnershipEvent(TouchOwnershipEvent *ev, xEvent **xi)
return BadAlloc;
xtoe = (xXITouchOwnershipEvent *) * xi;
xtoe->type = GenericEvent;
xtoe->extension = IReqCode;
xtoe->extension = EXTENSION_MAJOR_XINPUT;
xtoe->length = bytes_to_int32(len - sizeof(xEvent));
xtoe->evtype = GetXI2Type(ev->type);
xtoe->deviceid = ev->deviceid;
@ -789,7 +790,7 @@ eventToRawEvent(RawDeviceEvent *ev, xEvent **xi)
return BadAlloc;
raw = (xXIRawEvent *) * xi;
raw->type = GenericEvent;
raw->extension = IReqCode;
raw->extension = EXTENSION_MAJOR_XINPUT;
raw->evtype = GetXI2Type(ev->type);
raw->time = ev->time;
raw->length = bytes_to_int32(len - sizeof(xEvent));
@ -826,7 +827,7 @@ eventToBarrierEvent(BarrierEvent *ev, xEvent **xi)
return BadAlloc;
barrier = (xXIBarrierEvent*) *xi;
barrier->type = GenericEvent;
barrier->extension = IReqCode;
barrier->extension = EXTENSION_MAJOR_XINPUT;
barrier->evtype = GetXI2Type(ev->type);
barrier->length = bytes_to_int32(len - sizeof(xEvent));
barrier->deviceid = ev->deviceid;
@ -857,7 +858,7 @@ eventToGesturePinchEvent(GestureEvent *ev, xEvent **xi)
return BadAlloc;
xpe = (xXIGesturePinchEvent *) * xi;
xpe->type = GenericEvent;
xpe->extension = IReqCode;
xpe->extension = EXTENSION_MAJOR_XINPUT;
xpe->evtype = GetXI2Type(ev->type);
xpe->time = ev->time;
xpe->length = bytes_to_int32(len - sizeof(xEvent));
@ -901,7 +902,7 @@ eventToGestureSwipeEvent(GestureEvent *ev, xEvent **xi)
return BadAlloc;
xde = (xXIGestureSwipeEvent *) * xi;
xde->type = GenericEvent;
xde->extension = IReqCode;
xde->extension = EXTENSION_MAJOR_XINPUT;
xde->evtype = GetXI2Type(ev->type);
xde->time = ev->time;
xde->length = bytes_to_int32(len - sizeof(xEvent));

9
dix/events.c
View File

@ -121,9 +121,10 @@ Equipment Corporation.
#include "dix/cursor_priv.h"
#include "dix/dix_priv.h"
#include "dix/dixgrabs_priv.h"
#include "dix/input_priv.h"
#include "dix/eventconvert.h"
#include "dix/exevents_priv.h"
#include "dix/extension_priv.h"
#include "dix/input_priv.h"
#include "dix/reqhandlers_priv.h"
#include "dix/resource_priv.h"
#include "os/bug_priv.h"
@ -196,7 +197,7 @@ xi2_get_type(const xEvent *event)
const xGenericEvent *e = (const xGenericEvent *) event;
return (e->type != GenericEvent ||
e->extension != IReqCode) ? 0 : e->evtype;
e->extension != EXTENSION_MAJOR_XINPUT) ? 0 : e->evtype;
}
/**
@ -4763,7 +4764,7 @@ DeviceEnterLeaveEvent(DeviceIntPtr mouse,
return;
event->type = GenericEvent;
event->extension = IReqCode;
event->extension = EXTENSION_MAJOR_XINPUT;
event->evtype = type;
event->length = (len - sizeof(xEvent)) / 4;
event->buttons_len = btlen;
@ -6299,7 +6300,7 @@ IsWrongPointerBarrierClient(ClientPtr client, DeviceIntPtr dev, xEvent *event)
{
xXIBarrierEvent *ev = (xXIBarrierEvent*)event;
if (ev->type != GenericEvent || ev->extension != IReqCode)
if (ev->type != GenericEvent || ev->extension != EXTENSION_MAJOR_XINPUT)
return FALSE;
if (ev->evtype != XI_BarrierHit && ev->evtype != XI_BarrierLeave)