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xserver/hw/xfree86/os-support/sysv/xqueue.c

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/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/sysv/xqueue.c,v 3.19 2000/02/10 22:33:45 dawes Exp $ */
/*
* Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany
* Copyright 1993-1999 by The XFree86 Project, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the copyright holders not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. The copyright holders make no
* representations about the suitability of this software for any purpose.
* It is provided "as is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*
*/
/* $XConsortium: xqueue.c /main/8 1996/10/19 18:08:11 kaleb $ */
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif
#include <X11/X.h>
#include "compiler.h"
#include "xf86.h"
#include "xf86Priv.h"
#include "xf86_OSlib.h"
#include "xf86Xinput.h"
#include "xf86OSmouse.h"
#include "xqueue.h"
#ifdef XQUEUE
static xqEventQueue *XqueQaddr;
static int xqueFd = -1;
#ifndef XQUEUE_ASYNC
static int xquePipe[2];
#endif
#ifdef XKB
#include "inputstr.h"
#include <X11/extensions/XKB.h>
#include <X11/extensions/XKBstr.h>
#include <X11/extensions/XKBsrv.h>
extern Bool noXkbExtension;
#endif
#include "xf86Xinput.h"
#include "mipointer.h"
typedef struct {
int xquePending;
int xqueSema;
} XqInfoRec, *XqInfoPtr;
InputInfoPtr XqMouse = NULL;
InputInfoPtr XqKeyboard = NULL;
#ifndef XQUEUE_ASYNC
/*
* xf86XqueSignal --
* Trap the signal from xqueue and let it be known that events are
* ready for collection
*/
static void
xf86XqueSignal(int signum)
{
((XqInfoPtr)(((MouseDevPtr)(XqMouse->private))->mousePriv))->xquePending = 1;
/*
* This is a hack, but it is the only reliable way I can find of letting
* the main select() loop know that there is more input waiting. Receiving
* a signal will interrupt select(), but there is no way I can find of
* dealing with events that come in between the end of processing the
* last set and when select() gets called.
*
* Suggestions for better ways of dealing with this without going back to
* asynchronous event processing are welcome.
*/
#ifdef DEBUG
ErrorF("xf86XqueSignal\n");
#endif
write(xquePipe[1], "X", 1);
signal(SIGUSR2, xf86XqueSignal);
}
#endif
/*
* xf86XqueKbdProc --
* Handle the initialization, etc. of a keyboard.
*/
int
xf86XqueKbdProc(DeviceIntPtr pKeyboard, int what)
{
KeySymsRec keySyms;
CARD8 modMap[MAP_LENGTH];
switch (what) {
case DEVICE_INIT:
xf86KbdGetMapping(&keySyms, modMap);
/*
* Get also the initial led settings
*/
ioctl(xf86Info.consoleFd, KDGETLED, &xf86Info.leds);
/*
* Perform final initialization of the system private keyboard
* structure and fill in various slots in the device record
* itself which couldn't be filled in before.
*/
pKeyboard->public.on = FALSE;
#ifdef XKB
if (noXkbExtension) {
#endif
InitKeyboardDeviceStruct((DevicePtr)xf86Info.pKeyboard,
&keySyms,
modMap,
xf86KbdBell,
(KbdCtrlProcPtr)xf86KbdCtrl);
#ifdef XKB
} else {
XkbComponentNamesRec names;
if (XkbInitialMap) {
if ((xf86Info.xkbkeymap = strchr(XkbInitialMap, '/')) != NULL)
xf86Info.xkbkeymap++;
else
xf86Info.xkbkeymap = XkbInitialMap;
}
if (xf86Info.xkbkeymap) {
names.keymap = xf86Info.xkbkeymap;
names.keycodes = NULL;
names.types = NULL;
names.compat = NULL;
names.symbols = NULL;
names.geometry = NULL;
} else {
names.keymap = NULL;
names.keycodes = xf86Info.xkbkeycodes;
names.types = xf86Info.xkbtypes;
names.compat = xf86Info.xkbcompat;
names.symbols = xf86Info.xkbsymbols;
names.geometry = xf86Info.xkbgeometry;
}
if ((xf86Info.xkbkeymap || xf86Info.xkbcomponents_specified)
&& (xf86Info.xkbmodel == NULL || xf86Info.xkblayout == NULL)) {
xf86Info.xkbrules = NULL;
}
XkbSetRulesDflts(xf86Info.xkbrules, xf86Info.xkbmodel,
xf86Info.xkblayout, xf86Info.xkbvariant,
xf86Info.xkboptions);
XkbInitKeyboardDeviceStruct(pKeyboard,
&names,
&keySyms,
modMap,
xf86KbdBell,
(KbdCtrlProcPtr)xf86KbdCtrl);
}
#endif
xf86InitKBD(TRUE);
break;
case DEVICE_ON:
pKeyboard->public.on = TRUE;
xf86InitKBD(FALSE);
break;
case DEVICE_CLOSE:
case DEVICE_OFF:
pKeyboard->public.on = FALSE;
break;
}
return (Success);
}
/*
* xf86XqueEvents --
* Get some events from our queue. Nothing to do here ...
*/
void
xf86XqueEvents()
{
}
#ifdef XQUEUE_ASYNC
static void XqDoInput(int signum);
#endif
void
XqReadInput(InputInfoPtr pInfo)
{
MouseDevPtr pMse;
XqInfoPtr pXq;
xqEvent *XqueEvents;
int XqueHead;
char buf[100];
signed char dx, dy;
if (xqueFd < 0)
return;
pMse = pInfo->private;
pXq = pMse->mousePriv;
XqueEvents = XqueQaddr->xq_events;
XqueHead = XqueQaddr->xq_head;
while (XqueHead != XqueQaddr->xq_tail) {
switch (XqueEvents[XqueHead].xq_type) {
case XQ_BUTTON:
pMse->PostEvent(pInfo, ~(XqueEvents[XqueHead].xq_code) & 0x07,
0, 0, 0, 0);
#ifdef DEBUG
ErrorF("xqueue: buttons: %d\n", ~(XqueEvents[XqueHead].xq_code) & 0x07);
#endif
break;
case XQ_MOTION:
dx = (signed char)XqueEvents[XqueHead].xq_x;
dy = (signed char)XqueEvents[XqueHead].xq_y;
pMse->PostEvent(pInfo, ~(XqueEvents[XqueHead].xq_code) & 0x07,
(int)dx, (int)dy, 0, 0);
#ifdef DEBUG
ErrorF("xqueue: Motion: (%d, %d) (buttons: %d)\n", dx, dy, ~(XqueEvents[XqueHead].xq_code) & 0x07);
#endif
break;
case XQ_KEY:
/* XXX Need to deal with the keyboard part nicely. */
#ifdef DEBUG
ErrorF("xqueue: key: %d\n", XqueEvents[XqueHead].xq_code);
#endif
xf86PostKbdEvent(XqueEvents[XqueHead].xq_code);
break;
default:
xf86Msg(X_WARNING, "Unknown Xque Event: 0x%02x\n",
XqueEvents[XqueHead].xq_type);
}
if ((++XqueHead) == XqueQaddr->xq_size) XqueHead = 0;
xf86Info.inputPending = TRUE;
}
/* reenable the signal-processing */
#ifdef XQUEUE_ASYNC
signal(SIGUSR2, XqDoInput);
#endif
#ifndef XQUEUE_ASYNC
{
int rval;
while ((rval = read(xquePipe[0], buf, sizeof(buf))) > 0)
#ifdef DEBUG
ErrorF("Read %d bytes from xquePipe[0]\n", rval);
#else
;
#endif
}
#endif
#ifdef DEBUG
ErrorF("Leaving XqReadInput()\n");
#endif
pXq->xquePending = 0;
XqueQaddr->xq_head = XqueQaddr->xq_tail;
XqueQaddr->xq_sigenable = 1; /* UNLOCK */
}
#ifdef XQUEUE_ASYNC
static void
XqDoInput(int signum)
{
if (XqMouse)
XqReadInput(XqMouse);
}
#endif
static void
XqBlock(pointer blockData, OSTimePtr pTimeout, pointer pReadmask)
{
InputInfoPtr pInfo;
MouseDevPtr pMse;
XqInfoPtr pXq;
/*
* On MP SVR4 boxes, a race condition exists because the XQUEUE does
* not have anyway to lock it for exclusive access. This results in one
* processor putting something on the queue at the same time the other
* processor is taking it something off. The count of items in the queue
* can get off by 1. This just goes and checks to see if an extra event
* was put in the queue a during this period. The signal for this event
* was ignored while processing the previous event.
*/
pInfo = blockData;
pMse = pInfo->private;
pXq = pMse-> mousePriv;
if (!pXq->xquePending) {
#ifdef DEBUG
ErrorF("XqBlock: calling XqReadInput()\n");
#endif
XqReadInput((InputInfoPtr)blockData);
} else {
#ifdef DEBUG
ErrorF("XqBlock: not calling XqReadInput()\n");
#endif
;
}
/*
* Make sure that any events that come in here are passed on without.
* waiting for the next wakeup.
*/
if (xf86Info.inputPending) {
#ifdef DEBUG
ErrorF("XqBlock: calling ProcessInputEvents()\n");
#endif
ProcessInputEvents();
} else {
#ifdef DEBUG
ErrorF("XqBlock: not calling ProcessInputEvents()\n");
#endif
;
}
}
/*
* XqEnable --
* Enable the handling of the Xque
*/
static int
XqEnable(InputInfoPtr pInfo)
{
MouseDevPtr pMse;
XqInfoPtr pXq;
static struct kd_quemode xqueMode;
static Bool was_here = FALSE;
pMse = pInfo->private;
pXq = pMse->mousePriv;
if (xqueFd < 0) {
if ((xqueFd = open("/dev/mouse", O_RDONLY | O_NDELAY)) < 0) {
if (xf86GetAllowMouseOpenFail()) {
xf86Msg(X_WARNING,
"%s: Cannot open /dev/mouse (%s) - Continuing...\n",
pInfo->name, strerror(errno));
return Success;
} else {
xf86Msg(X_ERROR, "%s: Cannot open /dev/mouse (%s)\n",
pInfo->name, strerror(errno));
return !Success;
}
}
}
#ifndef XQUEUE_ASYNC
if (!was_here) {
pipe(xquePipe);
fcntl(xquePipe[0], F_SETFL, fcntl(xquePipe[0], F_GETFL, 0) | O_NDELAY);
fcntl(xquePipe[1], F_SETFL, fcntl(xquePipe[1], F_GETFL, 0) | O_NDELAY);
was_here = TRUE;
}
#endif
if (pXq->xqueSema++ == 0) {
#ifdef XQUEUE_ASYNC
(void) signal(SIGUSR2, XqDoInput);
#else
(void) signal(SIGUSR2, xf86XqueSignal);
#endif
xqueMode.qsize = 64; /* max events */
xqueMode.signo = SIGUSR2;
ioctl(xf86Info.consoleFd, KDQUEMODE, NULL);
if (ioctl(xf86Info.consoleFd, KDQUEMODE, &xqueMode) < 0) {
xf86Msg(X_ERROR, "%s: Cannot set KDQUEMODE", pInfo->name);
return !Success;
}
XqueQaddr = (xqEventQueue *)xqueMode.qaddr;
XqueQaddr->xq_sigenable = 1; /* UNLOCK */
}
return Success;
}
/*
* xf86XqueDisable --
* disable the handling of the Xque
*/
static int
XqDisable(InputInfoPtr pInfo)
{
MouseDevPtr pMse;
XqInfoPtr pXq;
pMse = pInfo->private;
pXq = pMse->mousePriv;
if (pXq->xqueSema-- == 1)
{
XqueQaddr->xq_sigenable = 0; /* LOCK */
if (ioctl(xf86Info.consoleFd, KDQUEMODE, NULL) < 0) {
xf86Msg(X_ERROR, "%s: Cannot unset KDQUEMODE", pInfo->name);
return !Success;
}
}
if (xqueFd >= 0) {
close(xqueFd);
xqueFd = -1;
}
return Success;
}
/*
* XqMouseProc --
* Handle the initialization, etc. of a mouse
*/
static int
XqMouseProc(DeviceIntPtr pPointer, int what)
{
InputInfoPtr pInfo;
MouseDevPtr pMse;
unchar map[4];
int ret;
pInfo = pPointer->public.devicePrivate;
pMse = pInfo->private;
pMse->device = pPointer;
switch (what) {
case DEVICE_INIT:
pPointer->public.on = FALSE;
map[1] = 1;
map[2] = 2;
map[3] = 3;
InitPointerDeviceStruct((DevicePtr)pPointer,
map,
3,
miPointerGetMotionEvents,
pMse->Ctrl,
miPointerGetMotionBufferSize());
/* X valuator */
xf86InitValuatorAxisStruct(pPointer, 0, 0, -1, 1, 0, 1);
xf86InitValuatorDefaults(pPointer, 0);
/* Y valuator */
xf86InitValuatorAxisStruct(pPointer, 1, 0, -1, 1, 0, 1);
xf86InitValuatorDefaults(pPointer, 1);
xf86MotionHistoryAllocate(pInfo);
RegisterBlockAndWakeupHandlers(XqBlock, (WakeupHandlerProcPtr)NoopDDA,
pInfo);
break;
case DEVICE_ON:
pMse->lastButtons = 0;
pMse->emulateState = 0;
pPointer->public.on = TRUE;
ret = XqEnable(pInfo);
#ifndef XQUEUE_ASYNC
if (xquePipe[0] != -1) {
pInfo->fd = xquePipe[0];
AddEnabledDevice(xquePipe[0]);
}
#endif
return ret;
case DEVICE_CLOSE:
case DEVICE_OFF:
pPointer->public.on = FALSE;
ret = XqDisable(pInfo);
#ifndef XQUEUE_ASYNC
if (xquePipe[0] != -1) {
RemoveEnabledDevice(xquePipe[0]);
pInfo->fd = -1;
}
#endif
return ret;
}
return Success;
}
Bool
XqueueMousePreInit(InputInfoPtr pInfo, const char *protocol, int flags)
{
MouseDevPtr pMse;
XqInfoPtr pXq;
pMse = pInfo->private;
pMse->protocol = protocol;
xf86Msg(X_CONFIG, "%s: Protocol: %s\n", pInfo->name, protocol);
pXq = pMse->mousePriv = xnfcalloc(sizeof(XqInfoRec), 1);
/* Collect the options, and process the common options. */
xf86CollectInputOptions(pInfo, NULL, NULL);
xf86ProcessCommonOptions(pInfo, pInfo->options);
/* Process common mouse options (like Emulate3Buttons, etc). */
pMse->CommonOptions(pInfo);
/* Setup the local procs. */
pInfo->device_control = XqMouseProc;
#ifdef XQUEUE_ASYNC
pInfo->read_input = NULL;
#else
pInfo->read_input = XqReadInput;
#endif
pInfo->fd = -1;
XqMouse = pInfo;
pInfo->flags |= XI86_CONFIGURED;
return TRUE;
}
#endif /* XQUEUE */
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