Merge remote-tracking branch 'origin/released'

Conflicts:
	xorg-server/Xext/dpms.c
	xorg-server/Xext/saver.c
	xorg-server/Xext/security.c
	xorg-server/Xext/shape.c
	xorg-server/Xext/sync.c
	xorg-server/Xi/opendev.c
	xorg-server/fb/wfbrename.h
	xorg-server/glx/glxserver.h
	xorg-server/hw/xwin/winwindowswm.c
	xorg-server/mi/miarc.c
	xorg-server/mi/miwideline.c
	xorg-server/os/io.c
	xorg-server/render/mipict.c

1 files changed, 1146 insertions, 1148 deletions

diff --git a/xorg-server/os/io.c b/xorg-server/os/io.c
index d2eb04649..b30f20767 100644
--- a/xorg-server/os/io.c
+++ b/xorg-server/os/io.c
@@ -1,1148 +1,1146 @@
-/***********************************************************

-

-Copyright 1987, 1989, 1998  The Open Group

-

-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.

-

-The above copyright notice and this permission notice shall be included in

-all copies or substantial portions of the Software.

-

-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE

-OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN

-AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

-

-Except as contained in this notice, the name of The Open Group shall not be

-used in advertising or otherwise to promote the sale, use or other dealings

-in this Software without prior written authorization from The Open Group.

-

-

-Copyright 1987, 1989 by Digital Equipment Corporation, Maynard, Massachusetts.

-

-                        All Rights Reserved

-

-Permission to use, copy, modify, and distribute this software and its 

-documentation for any purpose and without fee is hereby granted, 

-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 Digital not be

-used in advertising or publicity pertaining to distribution of the

-software without specific, written prior permission.  

-

-DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING

-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL

-DIGITAL 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.

-

-

-******************************************************************/

-/*****************************************************************

- * i/o functions

- *

- *   WriteToClient, ReadRequestFromClient

- *   InsertFakeRequest, ResetCurrentRequest

- *

- *****************************************************************/

-

-#ifdef HAVE_DIX_CONFIG_H

-#include <dix-config.h>

-#endif

-

-#undef DEBUG_COMMUNICATION

-

-#ifdef WIN32

-#include <X11/Xwinsock.h>

-#endif

-#include <stdio.h>

-#define XSERV_t

-#define TRANS_SERVER

-#define TRANS_REOPEN

-#include <X11/Xtrans/Xtrans.h>

-#include <X11/Xmd.h>

-#include <errno.h>

-#if !defined(WIN32)

-#include <sys/uio.h>

-#endif

-#include <X11/X.h>

-#include <X11/Xproto.h>

-#include "os.h"

-#include "osdep.h"

-#include <X11/Xpoll.h>

-#include "opaque.h"

-#include "dixstruct.h"

-#include "misc.h"

-

-CallbackListPtr       ReplyCallback;

-CallbackListPtr       FlushCallback;

-

-static ConnectionInputPtr AllocateInputBuffer(void);

-static ConnectionOutputPtr AllocateOutputBuffer(void);

-

-/* check for both EAGAIN and EWOULDBLOCK, because some supposedly POSIX

- * systems are broken and return EWOULDBLOCK when they should return EAGAIN

- */

-#ifndef WIN32

-#define ETEST(err) (err == EAGAIN || err == EWOULDBLOCK)

-#else /* WIN32 The socket errorcodes differ from the normal errors*/

-#define ETEST(err) (err == EAGAIN || err == WSAEWOULDBLOCK)

-#endif

-

-static Bool CriticalOutputPending;

-static int timesThisConnection = 0;

-static ConnectionInputPtr FreeInputs = (ConnectionInputPtr)NULL;

-static ConnectionOutputPtr FreeOutputs = (ConnectionOutputPtr)NULL;

-static OsCommPtr AvailableInput = (OsCommPtr)NULL;

-

-#define get_req_len(req,cli) ((cli)->swapped ? \

-			      lswaps((req)->length) : (req)->length)

-

-#include <X11/extensions/bigreqsproto.h>

-

-#define get_big_req_len(req,cli) ((cli)->swapped ? \

-				  lswapl(((xBigReq *)(req))->length) : \

-				  ((xBigReq *)(req))->length)

-

-#define MAX_TIMES_PER         10

-

-/*

- *   A lot of the code in this file manipulates a ConnectionInputPtr:

- *

- *    -----------------------------------------------

- *   |------- bufcnt ------->|           |           |

- *   |           |- gotnow ->|           |           |

- *   |           |-------- needed ------>|           |

- *   |-----------+--------- size --------+---------->|

- *    -----------------------------------------------

- *   ^           ^

- *   |           |

- *   buffer   bufptr

- *

- *  buffer is a pointer to the start of the buffer.

- *  bufptr points to the start of the current request.

- *  bufcnt counts how many bytes are in the buffer.

- *  size is the size of the buffer in bytes.

- *

- *  In several of the functions, gotnow and needed are local variables

- *  that do the following:

- *

- *  gotnow is the number of bytes of the request that we're

- *  trying to read that are currently in the buffer.

- *  Typically, gotnow = (buffer + bufcnt) - bufptr

- *

- *  needed = the length of the request that we're trying to

- *  read.  Watch out: needed sometimes counts bytes and sometimes

- *  counts CARD32's.

- */

-

-

-/*****************************************************************

- * ReadRequestFromClient

- *    Returns one request in client->requestBuffer.  The request

- *    length will be in client->req_len.  Return status is:

- *

- *    > 0  if  successful, specifies length in bytes of the request

- *    = 0  if  entire request is not yet available

- *    < 0  if  client should be terminated

- *

- *    The request returned must be contiguous so that it can be

- *    cast in the dispatcher to the correct request type.  Because requests

- *    are variable length, ReadRequestFromClient() must look at the first 4

- *    or 8 bytes of a request to determine the length (the request length is

- *    in the 3rd and 4th bytes of the request unless it is a Big Request

- *    (see the Big Request Extension), in which case the 3rd and 4th bytes

- *    are zero and the following 4 bytes are the request length.

- *

- *    Note: in order to make the server scheduler (WaitForSomething())

- *    "fair", the ClientsWithInput mask is used.  This mask tells which

- *    clients have FULL requests left in their buffers.  Clients with

- *    partial requests require a read.  Basically, client buffers

- *    are drained before select() is called again.  But, we can't keep

- *    reading from a client that is sending buckets of data (or has

- *    a partial request) because others clients need to be scheduled.

- *****************************************************************/

-

-static void

-YieldControl(void)

-{

-    isItTimeToYield = TRUE;

-    timesThisConnection = 0;

-}

-

-static void

-YieldControlNoInput(int fd)

-{

-    YieldControl();

-    FD_CLR(fd, &ClientsWithInput);

-}

-

-static void

-YieldControlDeath(void)

-{

-    timesThisConnection = 0;

-}

-

-int

-ReadRequestFromClient(ClientPtr client)

-{

-    OsCommPtr oc = (OsCommPtr)client->osPrivate;

-    ConnectionInputPtr oci = oc->input;

-    int fd = oc->fd;

-    unsigned int gotnow, needed;

-    int result;

-    register xReq *request;

-    Bool need_header;

-    Bool move_header;

-

-    /* If an input buffer was empty, either free it if it is too big

-     * or link it into our list of free input buffers.  This means that

-     * different clients can share the same input buffer (at different

-     * times).  This was done to save memory.

-     */

-

-    if (AvailableInput)

-    {

-	if (AvailableInput != oc)

-	{

-	    register ConnectionInputPtr aci = AvailableInput->input;

-	    if (aci->size > BUFWATERMARK)

-	    {

-		free(aci->buffer);

-		free(aci);

-	    }

-	    else

-	    {

-		aci->next = FreeInputs;

-		FreeInputs = aci;

-	    }

-	    AvailableInput->input = (ConnectionInputPtr)NULL;

-	}

-	AvailableInput = (OsCommPtr)NULL;

-    }

-

-    /* make sure we have an input buffer */

-

-    if (!oci)

-    {

-	if ((oci = FreeInputs))

-	{

-	    FreeInputs = oci->next;

-	}

-	else if (!(oci = AllocateInputBuffer()))

-	{

-	    YieldControlDeath();

-	    return -1;

-	}

-	oc->input = oci;

-    }

-

-    /* advance to start of next request */

-

-    oci->bufptr += oci->lenLastReq;

-

-    need_header = FALSE;

-    move_header = FALSE;

-    gotnow = oci->bufcnt + oci->buffer - oci->bufptr;

-

-    if (oci->ignoreBytes > 0) {

-	if (oci->ignoreBytes > oci->size)

-	    needed = oci->size;

-	else

-	    needed = oci->ignoreBytes;

-    }

-    else if (gotnow < sizeof(xReq))

-    {

-	/* We don't have an entire xReq yet.  Can't tell how big

-	 * the request will be until we get the whole xReq.

-	 */

-	needed = sizeof(xReq);

-	need_header = TRUE;

-    }

-    else

-    {

-	/* We have a whole xReq.  We can tell how big the whole

-	 * request will be unless it is a Big Request.

-	 */

-	request = (xReq *)oci->bufptr;

-	needed = get_req_len(request, client);

-	if (!needed && client->big_requests)

-	{

-	    /* It's a Big Request. */

-	    move_header = TRUE;

-	    if (gotnow < sizeof(xBigReq))

-	    {

-		/* Still need more data to tell just how big. */

-		needed = bytes_to_int32(sizeof(xBigReq)); /* needed is in CARD32s now */

-		need_header = TRUE;

-	    }

-	    else

-		needed = get_big_req_len(request, client);

-	}

-	client->req_len = needed;

-	needed <<= 2; /* needed is in bytes now */

-    }

-    if (gotnow < needed)

-    {

-	/* Need to read more data, either so that we can get a

-	 * complete xReq (if need_header is TRUE), a complete

-	 * xBigReq (if move_header is TRUE), or the rest of the

-	 * request (if need_header and move_header are both FALSE).

-	 */

-

-	oci->lenLastReq = 0;

-	if (needed > maxBigRequestSize << 2)

-	{

-	    /* request is too big for us to handle */

-	    /*

-	     * Mark the rest of it as needing to be ignored, and then return

-	     * the full size.  Dispatch() will turn it into a BadLength error.

-	     */

-	    oci->ignoreBytes = needed - gotnow;

-	    oci->lenLastReq = gotnow;

-	    return needed;

-	}

-	if ((gotnow == 0) ||

-	    ((oci->bufptr - oci->buffer + needed) > oci->size))

-	{

-	    /* no data, or the request is too big to fit in the buffer */

-

-	    if ((gotnow > 0) && (oci->bufptr != oci->buffer))

-		/* save the data we've already read */

-		memmove(oci->buffer, oci->bufptr, gotnow);

-	    if (needed > oci->size)

-	    {

-		/* make buffer bigger to accomodate request */

-		char *ibuf;

-

-		ibuf = (char *)realloc(oci->buffer, needed);

-		if (!ibuf)

-		{

-		    YieldControlDeath();

-		    return -1;

-		}

-		oci->size = needed;

-		oci->buffer = ibuf;

-	    }

-	    oci->bufptr = oci->buffer;

-	    oci->bufcnt = gotnow;

-	}

-	/*  XXX this is a workaround.  This function is sometimes called

-	 *  after the trans_conn has been freed.  In this case trans_conn

-	 *  will be null.  Really ought to restructure things so that we

-	 *  never get here in those circumstances.

-	 */

-	if (!oc->trans_conn)

-	{

-	    /*  treat as if an error occured on the read, which is what

-	     *  used to happen

-	     */

-	    YieldControlDeath();

-	    return -1;

-	}

-	    result = _XSERVTransRead(oc->trans_conn, oci->buffer + oci->bufcnt,

-				     oci->size - oci->bufcnt); 

-	if (result <= 0)

-	{

-	    if ((result < 0) && ETEST(errno))

-	    {

-#if defined(SVR4) && defined(__i386__) && !defined(sun)

-		if (0)

-#endif

-		{

-		    YieldControlNoInput(fd);

-		    return 0;

-		}

-	    }

-	    YieldControlDeath();

-	    return -1;

-	}

-	oci->bufcnt += result;

-	gotnow += result;

-	/* free up some space after huge requests */

-	if ((oci->size > BUFWATERMARK) &&

-	    (oci->bufcnt < BUFSIZE) && (needed < BUFSIZE))

-	{

-	    char *ibuf;

-

-	    ibuf = (char *)realloc(oci->buffer, BUFSIZE);

-	    if (ibuf)

-	    {

-		oci->size = BUFSIZE;

-		oci->buffer = ibuf;

-		oci->bufptr = ibuf + oci->bufcnt - gotnow;

-	    }

-	}

-	if (need_header && gotnow >= needed)

-	{

-	    /* We wanted an xReq, now we've gotten it. */

-	    request = (xReq *)oci->bufptr;

-	    needed = get_req_len(request, client);

-	    if (!needed && client->big_requests)

-	    {

-		move_header = TRUE;

-		if (gotnow < sizeof(xBigReq))

-		    needed = bytes_to_int32(sizeof(xBigReq));

-		else

-		    needed = get_big_req_len(request, client);

-	    }

-	    client->req_len = needed;

-	    needed <<= 2;

-	}

-	if (gotnow < needed)

-	{

-	    /* Still don't have enough; punt. */

-	    YieldControlNoInput(fd);

-	    return 0;

-	}

-    }

-    if (needed == 0)

-    {

-	if (client->big_requests)

-	    needed = sizeof(xBigReq);

-	else

-	    needed = sizeof(xReq);

-    }

-

-    /* If there are bytes to ignore, ignore them now. */

-

-    if (oci->ignoreBytes > 0) {

-	assert(needed == oci->ignoreBytes || needed == oci->size);

-	/*

-	 * The _XSERVTransRead call above may return more or fewer bytes than we

-	 * want to ignore.  Ignore the smaller of the two sizes.

-	 */

-	if (gotnow < needed) {

-	    oci->ignoreBytes -= gotnow;

-	    oci->bufptr += gotnow;

-	    gotnow = 0;

-	} else {

-	    oci->ignoreBytes -= needed;

-	    oci->bufptr += needed;

-	    gotnow -= needed;

-	}

-	needed = 0;

-    }

-

-    oci->lenLastReq = needed;

-

-    /*

-     *  Check to see if client has at least one whole request in the

-     *  buffer beyond the request we're returning to the caller.

-     *  If there is only a partial request, treat like buffer

-     *  is empty so that select() will be called again and other clients

-     *  can get into the queue.   

-     */

-

-    gotnow -= needed;

-    if (gotnow >= sizeof(xReq)) 

-    {

-	request = (xReq *)(oci->bufptr + needed);

-	if (gotnow >= (result = (get_req_len(request, client) << 2))

-	    && (result ||

-		(client->big_requests &&

-		 (gotnow >= sizeof(xBigReq) &&

-		  gotnow >= (get_big_req_len(request, client) << 2))))

-	    )

-	    FD_SET(fd, &ClientsWithInput);

-	else

-	{

-	    if (!SmartScheduleDisable)

-		FD_CLR(fd, &ClientsWithInput);

-	    else

-		YieldControlNoInput(fd);

-	}

-    }

-    else

-    {

-	if (!gotnow)

-	    AvailableInput = oc;

-	if (!SmartScheduleDisable)

-	    FD_CLR(fd, &ClientsWithInput);

-	else

-	    YieldControlNoInput(fd);

-    }

-    if (SmartScheduleDisable)

-    if (++timesThisConnection >= MAX_TIMES_PER)

-	YieldControl();

-    if (move_header)

-    {

-	request = (xReq *)oci->bufptr;

-	oci->bufptr += (sizeof(xBigReq) - sizeof(xReq));

-	*(xReq *)oci->bufptr = *request;

-	oci->lenLastReq -= (sizeof(xBigReq) - sizeof(xReq));

-	client->req_len -= bytes_to_int32(sizeof(xBigReq) - sizeof(xReq));

-    }

-    client->requestBuffer = (pointer)oci->bufptr;

-#ifdef DEBUG_COMMUNICATION

-    {

-	xReq *req = client->requestBuffer;

-	ErrorF("REQUEST: ClientIDX: %i, type: 0x%x data: 0x%x len: %i\n",

-	       client->index,req->reqType,req->data,req->length);

-    }

-#endif

-    return needed;

-}

-

-/*****************************************************************

- * InsertFakeRequest

- *    Splice a consed up (possibly partial) request in as the next request.

- *

- **********************/

-

-Bool

-InsertFakeRequest(ClientPtr client, char *data, int count)

-{

-    OsCommPtr oc = (OsCommPtr)client->osPrivate;

-    ConnectionInputPtr oci = oc->input;

-    int fd = oc->fd;

-    int gotnow, moveup;

-

-    if (AvailableInput)

-    {

-	if (AvailableInput != oc)

-	{

-	    ConnectionInputPtr aci = AvailableInput->input;

-	    if (aci->size > BUFWATERMARK)

-	    {

-		free(aci->buffer);

-		free(aci);

-	    }

-	    else

-	    {

-		aci->next = FreeInputs;

-		FreeInputs = aci;

-	    }

-	    AvailableInput->input = (ConnectionInputPtr)NULL;

-	}

-	AvailableInput = (OsCommPtr)NULL;

-    }

-    if (!oci)

-    {

-	if ((oci = FreeInputs))

-	    FreeInputs = oci->next;

-	else if (!(oci = AllocateInputBuffer()))

-	    return FALSE;

-	oc->input = oci;

-    }

-    oci->bufptr += oci->lenLastReq;

-    oci->lenLastReq = 0;

-    gotnow = oci->bufcnt + oci->buffer - oci->bufptr;

-    if ((gotnow + count) > oci->size)

-    {

-	char *ibuf;

-

-	ibuf = (char *)realloc(oci->buffer, gotnow + count);

-	if (!ibuf)

-	    return FALSE;

-	oci->size = gotnow + count;

-	oci->buffer = ibuf;

-	oci->bufptr = ibuf + oci->bufcnt - gotnow;

-    }

-    moveup = count - (oci->bufptr - oci->buffer);

-    if (moveup > 0)

-    {

-	if (gotnow > 0)

-	    memmove(oci->bufptr + moveup, oci->bufptr, gotnow);

-	oci->bufptr += moveup;

-	oci->bufcnt += moveup;

-    }

-    memmove(oci->bufptr - count, data, count);

-    oci->bufptr -= count;

-    gotnow += count;

-    if ((gotnow >= sizeof(xReq)) &&

-	(gotnow >= (int)(get_req_len((xReq *)oci->bufptr, client) << 2)))

-	FD_SET(fd, &ClientsWithInput);

-    else

-	YieldControlNoInput(fd);

-    return TRUE;

-}

-

-/*****************************************************************

- * ResetRequestFromClient

- *    Reset to reexecute the current request, and yield.

- *

- **********************/

-

-void

-ResetCurrentRequest(ClientPtr client)

-{

-    OsCommPtr oc = (OsCommPtr)client->osPrivate;

-    register ConnectionInputPtr oci = oc->input;

-    int fd = oc->fd;

-    register xReq *request;

-    int gotnow, needed;

-    if (AvailableInput == oc)

-	AvailableInput = (OsCommPtr)NULL;

-    oci->lenLastReq = 0;

-    gotnow = oci->bufcnt + oci->buffer - oci->bufptr;

-    if (gotnow < sizeof(xReq))

-    {

-	YieldControlNoInput(fd);

-    }

-    else

-    {

-	request = (xReq *)oci->bufptr;

-	needed = get_req_len(request, client);

-	if (!needed && client->big_requests)

-	{

-	    oci->bufptr -= sizeof(xBigReq) - sizeof(xReq);

-	    *(xReq *)oci->bufptr = *request;

-	    ((xBigReq *)oci->bufptr)->length = client->req_len;

-	    if (client->swapped)

-	    {

-		char n;

-		swapl(&((xBigReq *)oci->bufptr)->length, n);

-	    }

-	}

-	if (gotnow >= (needed << 2))

-	{

-	    if (FD_ISSET(fd, &AllClients))

-	    {

-		FD_SET(fd, &ClientsWithInput);

-	    }

-	    else

-	    {

-		FD_SET(fd, &IgnoredClientsWithInput);

-	    }

-	    YieldControl();

-	}

-	else

-	    YieldControlNoInput(fd);

-    }

-}

-

-static const int padlength[4] = {0, 3, 2, 1};

-

- /********************

- * FlushAllOutput()

- *    Flush all clients with output.  However, if some client still

- *    has input in the queue (more requests), then don't flush.  This

- *    will prevent the output queue from being flushed every time around

- *    the round robin queue.  Now, some say that it SHOULD be flushed

- *    every time around, but...

- *

- **********************/

-

-void

-FlushAllOutput(void)

-{

-    register int index, base;

-    register fd_mask mask; /* raphael */

-    OsCommPtr oc;

-    register ClientPtr client;

-    Bool newoutput = NewOutputPending;

-#if defined(WIN32)

-    fd_set newOutputPending;

-#endif

-

-    if (FlushCallback)

-	CallCallbacks(&FlushCallback, NULL);

-

-    if (!newoutput)

-	return;

-

-    /*

-     * It may be that some client still has critical output pending,

-     * but he is not yet ready to receive it anyway, so we will

-     * simply wait for the select to tell us when he's ready to receive.

-     */

-    CriticalOutputPending = FALSE;

-    NewOutputPending = FALSE;

-

-#ifndef WIN32

-    for (base = 0; base < howmany(XFD_SETSIZE, NFDBITS); base++)

-    {

-	mask = OutputPending.fds_bits[ base ];

-	OutputPending.fds_bits[ base ] = 0;

-	while (mask)

-	{

-	    index = ffs(mask) - 1;

-	    mask &= ~lowbit(mask);

-	    if ((index = ConnectionTranslation[(base * (sizeof(fd_mask)*8)) + index]) == 0)

-		continue;

-	    client = clients[index];

-	    if (client->clientGone)

-		continue;

-	    oc = (OsCommPtr)client->osPrivate;

-	    if (FD_ISSET(oc->fd, &ClientsWithInput))

-	    {

-		FD_SET(oc->fd, &OutputPending); /* set the bit again */

-		NewOutputPending = TRUE;

-	    }

-	    else

-		(void)FlushClient(client, oc, (char *)NULL, 0);

-	}

-    }

-#else  /* WIN32 */

-    FD_ZERO(&newOutputPending);

-    for (base = 0; base < XFD_SETCOUNT(&OutputPending); base++)

-    {

-	    index = XFD_FD(&OutputPending, base);

-	    if ((index = GetConnectionTranslation(index)) == 0)

-		continue;

-	    client = clients[index];

-	    if (client->clientGone)

-		continue;

-	    oc = (OsCommPtr)client->osPrivate;

-	    if (FD_ISSET(oc->fd, &ClientsWithInput))

-	    {

-		FD_SET(oc->fd, &newOutputPending); /* set the bit again */

-		NewOutputPending = TRUE;

-	    }

-	    else

-		(void)FlushClient(client, oc, (char *)NULL, 0);

-    }

-    XFD_COPYSET(&newOutputPending, &OutputPending);

-#endif /* WIN32 */

-}

-

-void

-FlushIfCriticalOutputPending(void)

-{

-    if (CriticalOutputPending)

-	FlushAllOutput();

-}

-

-void

-SetCriticalOutputPending(void)

-{

-    CriticalOutputPending = TRUE;

-}

-

-/*****************

- * WriteToClient

- *    Copies buf into ClientPtr.buf if it fits (with padding), else

- *    flushes ClientPtr.buf and buf to client.  As of this writing,

- *    every use of WriteToClient is cast to void, and the result

- *    is ignored.  Potentially, this could be used by requests

- *    that are sending several chunks of data and want to break

- *    out of a loop on error.  Thus, we will leave the type of

- *    this routine as int.

- *****************/

-

-int

-WriteToClient (ClientPtr who, int count, const void *__buf)

-{

-    OsCommPtr oc;

-    ConnectionOutputPtr oco;

-    int padBytes;

-    const char *buf = __buf;

-#ifdef DEBUG_COMMUNICATION

-    Bool multicount = FALSE;

-#endif

-    if (!count || !who || who == serverClient || who->clientGone)

-	return 0;

-    oc = who->osPrivate;

-    oco = oc->output;

-#ifdef DEBUG_COMMUNICATION

-    {

-	char info[128];

-	xError *err;

-	xGenericReply *rep;

-	xEvent *ev;

-	

-	if (!who->replyBytesRemaining) {

-	    switch(buf[0]) {

-	    case X_Reply:

-		rep = (xGenericReply*)buf;

-		if (rep->sequenceNumber == who->sequence) {

-		    snprintf(info,127,"Xreply: type: 0x%x data: 0x%x "

-			     "len: %i seq#: 0x%x", rep->type, rep->data1,

-			     rep->length, rep->sequenceNumber);

-		    multicount = TRUE;

-		}

-		break;

-	    case X_Error:

-		err = (xError*)buf;

-		snprintf(info,127,"Xerror: Code: 0x%x resID: 0x%x maj: 0x%x "

-			 "min: %x", err->errorCode,err->resourceID,

-			 err->minorCode,err->majorCode);

-		break;

-	    default:

-		if ((buf[0] & 0x7f) == KeymapNotify) 

-		    snprintf(info,127,"KeymapNotifyEvent: %i",buf[0]);

-		else {

-		    ev = (xEvent*)buf;

-		    snprintf(info,127,"XEvent: type: 0x%x detail: 0x%x "

-			     "seq#: 0x%x",  ev->u.u.type, ev->u.u.detail,

-			     ev->u.u.sequenceNumber);

-		}

-	    }

-	    ErrorF("REPLY: ClientIDX: %i %s\n",who->index, info);

-	} else

-	    multicount = TRUE;

-    }

-#endif

-

-    if (!oco)

-    {

-	if ((oco = FreeOutputs))

-	{

-	    FreeOutputs = oco->next;

-	}

-	else if (!(oco = AllocateOutputBuffer()))

-	{

-	    if (oc->trans_conn) {

-		_XSERVTransDisconnect(oc->trans_conn);

-		_XSERVTransClose(oc->trans_conn);

-		oc->trans_conn = NULL;

-	    }

-	    MarkClientException(who);

-	    return -1;

-	}

-	oc->output = oco;

-    }

-

-    padBytes = padlength[count & 3];

-

-    if(ReplyCallback)

-    {

-        ReplyInfoRec replyinfo;

-

-	replyinfo.client = who;

-	replyinfo.replyData = buf;

-	replyinfo.dataLenBytes = count + padBytes;

-	if (who->replyBytesRemaining)

-	{ /* still sending data of an earlier reply */

-	    who->replyBytesRemaining -= count + padBytes;

-	    replyinfo.startOfReply = FALSE;

-	    replyinfo.bytesRemaining = who->replyBytesRemaining;

-	    CallCallbacks((&ReplyCallback), (pointer)&replyinfo);

-	}

-	else if (who->clientState == ClientStateRunning

-		 && buf[0] == X_Reply)

-        { /* start of new reply */

-	    CARD32 replylen;

-	    unsigned long bytesleft;

-	    char n;

-

-	    replylen = ((xGenericReply *)buf)->length;

-	    if (who->swapped)

-		swapl(&replylen, n);

-	    bytesleft = (replylen * 4) + SIZEOF(xReply) - count - padBytes;

-	    replyinfo.startOfReply = TRUE;

-	    replyinfo.bytesRemaining = who->replyBytesRemaining = bytesleft;

-	    CallCallbacks((&ReplyCallback), (pointer)&replyinfo);

-	} 	                      

-    }

-#ifdef DEBUG_COMMUNICATION

-    else if (multicount) {

-	if (who->replyBytesRemaining) {

-	    who->replyBytesRemaining -= (count + padBytes);

-	} else {

-	    CARD32 replylen;

-	    replylen = ((xGenericReply *)buf)->length;

-	    who->replyBytesRemaining =

-		(replylen * 4) + SIZEOF(xReply) - count - padBytes;

-	}

-    }

-#endif

-    if (oco->count + count + padBytes > oco->size)

-    {

-	FD_CLR(oc->fd, &OutputPending);

-	if(!XFD_ANYSET(&OutputPending)) {

-	  CriticalOutputPending = FALSE;

-	  NewOutputPending = FALSE;

-	}

-

-	if (FlushCallback)

-	    CallCallbacks(&FlushCallback, NULL);

-

-	return FlushClient(who, oc, buf, count);

-    }

-

-    NewOutputPending = TRUE;

-    FD_SET(oc->fd, &OutputPending);

-    memmove((char *)oco->buf + oco->count, buf, count);

-    oco->count += count + padBytes;

-    return count;

-}

-

- /********************

- * FlushClient()

- *    If the client isn't keeping up with us, then we try to continue

- *    buffering the data and set the apropriate bit in ClientsWritable

- *    (which is used by WaitFor in the select).  If the connection yields

- *    a permanent error, or we can't allocate any more space, we then

- *    close the connection.

- *

- **********************/

-

-int

-FlushClient(ClientPtr who, OsCommPtr oc, const void *__extraBuf, int extraCount)

-{

-    ConnectionOutputPtr oco = oc->output;

-    int connection = oc->fd;

-    XtransConnInfo trans_conn = oc->trans_conn;

-    struct iovec iov[3];

-    static char padBuffer[3];

-    const char *extraBuf = __extraBuf;

-    long written;

-    long padsize;

-    long notWritten;

-    long todo;

-

-    if (!oco)

-	return 0;

-    written = 0;

-    padsize = padlength[extraCount & 3];

-    notWritten = oco->count + extraCount + padsize;

-    todo = notWritten;

-    while (notWritten) {

-	long before = written;	/* amount of whole thing written */

-	long remain = todo;	/* amount to try this time, <= notWritten */

-	int i = 0;

-	long len;

-	

-	/* You could be very general here and have "in" and "out" iovecs

-	 * and write a loop without using a macro, but what the heck.  This

-	 * translates to:

-	 *

-	 *     how much of this piece is new?

-	 *     if more new then we are trying this time, clamp

-	 *     if nothing new

-	 *         then bump down amount already written, for next piece

-	 *         else put new stuff in iovec, will need all of next piece

-	 *

-	 * Note that todo had better be at least 1 or else we'll end up

-	 * writing 0 iovecs.

-	 */

-#define InsertIOV(pointer, length) \

-	len = (length) - before; \

-	if (len > remain) \

-	    len = remain; \

-	if (len <= 0) { \

-	    before = (-len); \

-	} else { \

-	    iov[i].iov_len = len; \

-	    iov[i].iov_base = (pointer) + before;	\

-	    i++; \

-	    remain -= len; \

-	    before = 0; \

-	}

-

-	InsertIOV ((char *)oco->buf, oco->count)

-	InsertIOV ((char *)extraBuf, extraCount)

-	InsertIOV (padBuffer, padsize)

-

-	errno = 0;

-	if (trans_conn && (len = _XSERVTransWritev(trans_conn, iov, i)) >= 0)

-	{

-	    written += len;

-	    notWritten -= len;

-	    todo = notWritten;

-	}

-	else if (ETEST(errno)

-#ifdef SUNSYSV /* check for another brain-damaged OS bug */

-		 || (errno == 0)

-#endif

-#ifdef EMSGSIZE /* check for another brain-damaged OS bug */

-		 || ((errno == EMSGSIZE) && (todo == 1))

-#endif

-		)

-	{

-	    /* If we've arrived here, then the client is stuffed to the gills

-	       and not ready to accept more.  Make a note of it and buffer

-	       the rest. */

-		errno=0;

-	    FD_SET(connection, &ClientsWriteBlocked);

-	    AnyClientsWriteBlocked = TRUE;

-

-	    if (written < oco->count)

-	    {

-		if (written > 0)

-		{

-		    oco->count -= written;

-		    memmove((char *)oco->buf,

-			    (char *)oco->buf + written,

-			  oco->count);

-		    written = 0;

-		}

-	    }

-	    else

-	    {

-		written -= oco->count;

-		oco->count = 0;

-	    }

-

-	    if (notWritten > oco->size)

-	    {

-		unsigned char *obuf;

-

-		obuf = (unsigned char *)realloc(oco->buf,

-						 notWritten + BUFSIZE);

-		if (!obuf)

-		{

-		    _XSERVTransDisconnect(oc->trans_conn);

-		    _XSERVTransClose(oc->trans_conn);

-		    oc->trans_conn = NULL;

-		    MarkClientException(who);

-		    oco->count = 0;

-		    return -1;

-		}

-		oco->size = notWritten + BUFSIZE;

-		oco->buf = obuf;

-	    }

-

-	    /* If the amount written extended into the padBuffer, then the

-	       difference "extraCount - written" may be less than 0 */

-	    if ((len = extraCount - written) > 0)

-		memmove ((char *)oco->buf + oco->count,

-			 extraBuf + written,

-		       len);

-

-	    oco->count = notWritten; /* this will include the pad */

-	    /* return only the amount explicitly requested */

-	    return extraCount;

-	}

-#ifdef EMSGSIZE /* check for another brain-damaged OS bug */

-	else if (errno == EMSGSIZE)

-	{

-	    todo >>= 1;

-	}

-#endif

-	else

-	{

-	    if (oc->trans_conn)

-	    {

-		_XSERVTransDisconnect(oc->trans_conn);

-		_XSERVTransClose(oc->trans_conn);

-		oc->trans_conn = NULL;

-	    }

-	    MarkClientException(who);

-	    oco->count = 0;

-	    return -1;

-	}

-    }

-

-    /* everything was flushed out */

-    oco->count = 0;

-    /* check to see if this client was write blocked */

-    if (AnyClientsWriteBlocked)

-    {

-	FD_CLR(oc->fd, &ClientsWriteBlocked);

- 	if (! XFD_ANYSET(&ClientsWriteBlocked))

-	    AnyClientsWriteBlocked = FALSE;

-    }

-    if (oco->size > BUFWATERMARK)

-    {

-	free(oco->buf);

-	free(oco);

-    }

-    else

-    {

-	oco->next = FreeOutputs;

-	FreeOutputs = oco;

-    }

-    oc->output = (ConnectionOutputPtr)NULL;

-    return extraCount; /* return only the amount explicitly requested */

-}

-

-static ConnectionInputPtr

-AllocateInputBuffer(void)

-{

-    ConnectionInputPtr oci;

-

-    oci = malloc(sizeof(ConnectionInput));

-    if (!oci)

-	return NULL;

-    oci->buffer = malloc(BUFSIZE);

-    if (!oci->buffer)

-    {

-	free(oci);

-	return NULL;

-    }

-    oci->size = BUFSIZE;

-    oci->bufptr = oci->buffer;

-    oci->bufcnt = 0;

-    oci->lenLastReq = 0;

-    oci->ignoreBytes = 0;

-    return oci;

-}

-

-static ConnectionOutputPtr

-AllocateOutputBuffer(void)

-{

-    ConnectionOutputPtr oco;

-

-    oco = malloc(sizeof(ConnectionOutput));

-    if (!oco)

-	return NULL;

-    oco->buf = calloc(1, BUFSIZE);

-    if (!oco->buf)

-    {

-	free(oco);

-	return NULL;

-    }

-    oco->size = BUFSIZE;

-    oco->count = 0;

-    return oco;

-}

-

-void

-FreeOsBuffers(OsCommPtr oc)

-{

-    ConnectionInputPtr oci;

-    ConnectionOutputPtr oco;

-

-    if (AvailableInput == oc)

-	AvailableInput = (OsCommPtr)NULL;

-    if ((oci = oc->input))

-    {

-	if (FreeInputs)

-	{

-	    free(oci->buffer);

-	    free(oci);

-	}

-	else

-	{

-	    FreeInputs = oci;

-	    oci->next = (ConnectionInputPtr)NULL;

-	    oci->bufptr = oci->buffer;

-	    oci->bufcnt = 0;

-	    oci->lenLastReq = 0;

-	}

-    }

-    if ((oco = oc->output))

-    {

-	if (FreeOutputs)

-	{

-	    free(oco->buf);

-	    free(oco);

-	}

-	else

-	{

-	    FreeOutputs = oco;

-	    oco->next = (ConnectionOutputPtr)NULL;

-	    oco->count = 0;

-	}

-    }

-}

-

-void

-ResetOsBuffers(void)

-{

-    ConnectionInputPtr oci;

-    ConnectionOutputPtr oco;

-

-    while ((oci = FreeInputs))

-    {

-	FreeInputs = oci->next;

-	free(oci->buffer);

-	free(oci);

-    }

-    while ((oco = FreeOutputs))

-    {

-	FreeOutputs = oco->next;

-	free(oco->buf);

-	free(oco);

-    }

-}

+/***********************************************************
+
+Copyright 1987, 1989, 1998  The Open Group
+
+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.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+
+Copyright 1987, 1989 by Digital Equipment Corporation, Maynard, Massachusetts.
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its 
+documentation for any purpose and without fee is hereby granted, 
+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 Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.  
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL 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.
+
+
+******************************************************************/
+/*****************************************************************
+ * i/o functions
+ *
+ *   WriteToClient, ReadRequestFromClient
+ *   InsertFakeRequest, ResetCurrentRequest
+ *
+ *****************************************************************/
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#undef DEBUG_COMMUNICATION
+
+#ifdef WIN32
+#include <X11/Xwinsock.h>
+#endif
+#include <stdio.h>
+#define XSERV_t
+#define TRANS_SERVER
+#define TRANS_REOPEN
+#include <X11/Xtrans/Xtrans.h>
+#include <X11/Xmd.h>
+#include <errno.h>
+#if !defined(WIN32)
+#include <sys/uio.h>
+#endif
+#include <X11/X.h>
+#include <X11/Xproto.h>
+#include "os.h"
+#include "osdep.h"
+#include <X11/Xpoll.h>
+#include "opaque.h"
+#include "dixstruct.h"
+#include "misc.h"
+
+CallbackListPtr       ReplyCallback;
+CallbackListPtr       FlushCallback;
+
+static ConnectionInputPtr AllocateInputBuffer(void);
+static ConnectionOutputPtr AllocateOutputBuffer(void);
+
+/* check for both EAGAIN and EWOULDBLOCK, because some supposedly POSIX
+ * systems are broken and return EWOULDBLOCK when they should return EAGAIN
+ */
+#ifndef WIN32
+#define ETEST(err) (err == EAGAIN || err == EWOULDBLOCK)
+#else /* WIN32 The socket errorcodes differ from the normal errors*/
+#define ETEST(err) (err == EAGAIN || err == WSAEWOULDBLOCK)
+#endif
+
+static Bool CriticalOutputPending;
+static int timesThisConnection = 0;
+static ConnectionInputPtr FreeInputs = (ConnectionInputPtr)NULL;
+static ConnectionOutputPtr FreeOutputs = (ConnectionOutputPtr)NULL;
+static OsCommPtr AvailableInput = (OsCommPtr)NULL;
+
+#define get_req_len(req,cli) ((cli)->swapped ? \
+			      lswaps((req)->length) : (req)->length)
+
+#include <X11/extensions/bigreqsproto.h>
+
+#define get_big_req_len(req,cli) ((cli)->swapped ? \
+				  lswapl(((xBigReq *)(req))->length) : \
+				  ((xBigReq *)(req))->length)
+
+#define MAX_TIMES_PER         10
+
+/*
+ *   A lot of the code in this file manipulates a ConnectionInputPtr:
+ *
+ *    -----------------------------------------------
+ *   |------- bufcnt ------->|           |           |
+ *   |           |- gotnow ->|           |           |
+ *   |           |-------- needed ------>|           |
+ *   |-----------+--------- size --------+---------->|
+ *    -----------------------------------------------
+ *   ^           ^
+ *   |           |
+ *   buffer   bufptr
+ *
+ *  buffer is a pointer to the start of the buffer.
+ *  bufptr points to the start of the current request.
+ *  bufcnt counts how many bytes are in the buffer.
+ *  size is the size of the buffer in bytes.
+ *
+ *  In several of the functions, gotnow and needed are local variables
+ *  that do the following:
+ *
+ *  gotnow is the number of bytes of the request that we're
+ *  trying to read that are currently in the buffer.
+ *  Typically, gotnow = (buffer + bufcnt) - bufptr
+ *
+ *  needed = the length of the request that we're trying to
+ *  read.  Watch out: needed sometimes counts bytes and sometimes
+ *  counts CARD32's.
+ */
+
+
+/*****************************************************************
+ * ReadRequestFromClient
+ *    Returns one request in client->requestBuffer.  The request
+ *    length will be in client->req_len.  Return status is:
+ *
+ *    > 0  if  successful, specifies length in bytes of the request
+ *    = 0  if  entire request is not yet available
+ *    < 0  if  client should be terminated
+ *
+ *    The request returned must be contiguous so that it can be
+ *    cast in the dispatcher to the correct request type.  Because requests
+ *    are variable length, ReadRequestFromClient() must look at the first 4
+ *    or 8 bytes of a request to determine the length (the request length is
+ *    in the 3rd and 4th bytes of the request unless it is a Big Request
+ *    (see the Big Request Extension), in which case the 3rd and 4th bytes
+ *    are zero and the following 4 bytes are the request length.
+ *
+ *    Note: in order to make the server scheduler (WaitForSomething())
+ *    "fair", the ClientsWithInput mask is used.  This mask tells which
+ *    clients have FULL requests left in their buffers.  Clients with
+ *    partial requests require a read.  Basically, client buffers
+ *    are drained before select() is called again.  But, we can't keep
+ *    reading from a client that is sending buckets of data (or has
+ *    a partial request) because others clients need to be scheduled.
+ *****************************************************************/
+
+static void
+YieldControl(void)
+{
+    isItTimeToYield = TRUE;
+    timesThisConnection = 0;
+}
+
+static void
+YieldControlNoInput(int fd)
+{
+    YieldControl();
+    FD_CLR(fd, &ClientsWithInput);
+}
+
+static void
+YieldControlDeath(void)
+{
+    timesThisConnection = 0;
+}
+
+int
+ReadRequestFromClient(ClientPtr client)
+{
+    OsCommPtr oc = (OsCommPtr)client->osPrivate;
+    ConnectionInputPtr oci = oc->input;
+    int fd = oc->fd;
+    unsigned int gotnow, needed;
+    int result;
+    register xReq *request;
+    Bool need_header;
+    Bool move_header;
+
+    /* If an input buffer was empty, either free it if it is too big
+     * or link it into our list of free input buffers.  This means that
+     * different clients can share the same input buffer (at different
+     * times).  This was done to save memory.
+     */
+
+    if (AvailableInput)
+    {
+	if (AvailableInput != oc)
+	{
+	    register ConnectionInputPtr aci = AvailableInput->input;
+	    if (aci->size > BUFWATERMARK)
+	    {
+		free(aci->buffer);
+		free(aci);
+	    }
+	    else
+	    {
+		aci->next = FreeInputs;
+		FreeInputs = aci;
+	    }
+	    AvailableInput->input = (ConnectionInputPtr)NULL;
+	}
+	AvailableInput = (OsCommPtr)NULL;
+    }
+
+    /* make sure we have an input buffer */
+
+    if (!oci)
+    {
+	if ((oci = FreeInputs))
+	{
+	    FreeInputs = oci->next;
+	}
+	else if (!(oci = AllocateInputBuffer()))
+	{
+	    YieldControlDeath();
+	    return -1;
+	}
+	oc->input = oci;
+    }
+
+    /* advance to start of next request */
+
+    oci->bufptr += oci->lenLastReq;
+
+    need_header = FALSE;
+    move_header = FALSE;
+    gotnow = oci->bufcnt + oci->buffer - oci->bufptr;
+
+    if (oci->ignoreBytes > 0) {
+	if (oci->ignoreBytes > oci->size)
+	    needed = oci->size;
+	else
+	    needed = oci->ignoreBytes;
+    }
+    else if (gotnow < sizeof(xReq))
+    {
+	/* We don't have an entire xReq yet.  Can't tell how big
+	 * the request will be until we get the whole xReq.
+	 */
+	needed = sizeof(xReq);
+	need_header = TRUE;
+    }
+    else
+    {
+	/* We have a whole xReq.  We can tell how big the whole
+	 * request will be unless it is a Big Request.
+	 */
+	request = (xReq *)oci->bufptr;
+	needed = get_req_len(request, client);
+	if (!needed && client->big_requests)
+	{
+	    /* It's a Big Request. */
+	    move_header = TRUE;
+	    if (gotnow < sizeof(xBigReq))
+	    {
+		/* Still need more data to tell just how big. */
+		needed = bytes_to_int32(sizeof(xBigReq)); /* needed is in CARD32s now */
+		need_header = TRUE;
+	    }
+	    else
+		needed = get_big_req_len(request, client);
+	}
+	client->req_len = needed;
+	needed <<= 2; /* needed is in bytes now */
+    }
+    if (gotnow < needed)
+    {
+	/* Need to read more data, either so that we can get a
+	 * complete xReq (if need_header is TRUE), a complete
+	 * xBigReq (if move_header is TRUE), or the rest of the
+	 * request (if need_header and move_header are both FALSE).
+	 */
+
+	oci->lenLastReq = 0;
+	if (needed > maxBigRequestSize << 2)
+	{
+	    /* request is too big for us to handle */
+	    /*
+	     * Mark the rest of it as needing to be ignored, and then return
+	     * the full size.  Dispatch() will turn it into a BadLength error.
+	     */
+	    oci->ignoreBytes = needed - gotnow;
+	    oci->lenLastReq = gotnow;
+	    return needed;
+	}
+	if ((gotnow == 0) ||
+	    ((oci->bufptr - oci->buffer + needed) > oci->size))
+	{
+	    /* no data, or the request is too big to fit in the buffer */
+
+	    if ((gotnow > 0) && (oci->bufptr != oci->buffer))
+		/* save the data we've already read */
+		memmove(oci->buffer, oci->bufptr, gotnow);
+	    if (needed > oci->size)
+	    {
+		/* make buffer bigger to accomodate request */
+		char *ibuf;
+
+		ibuf = (char *)realloc(oci->buffer, needed);
+		if (!ibuf)
+		{
+		    YieldControlDeath();
+		    return -1;
+		}
+		oci->size = needed;
+		oci->buffer = ibuf;
+	    }
+	    oci->bufptr = oci->buffer;
+	    oci->bufcnt = gotnow;
+	}
+	/*  XXX this is a workaround.  This function is sometimes called
+	 *  after the trans_conn has been freed.  In this case trans_conn
+	 *  will be null.  Really ought to restructure things so that we
+	 *  never get here in those circumstances.
+	 */
+	if (!oc->trans_conn)
+	{
+	    /*  treat as if an error occured on the read, which is what
+	     *  used to happen
+	     */
+	    YieldControlDeath();
+	    return -1;
+	}
+	    result = _XSERVTransRead(oc->trans_conn, oci->buffer + oci->bufcnt,
+				     oci->size - oci->bufcnt); 
+	if (result <= 0)
+	{
+	    if ((result < 0) && ETEST(errno))
+	    {
+#if defined(SVR4) && defined(__i386__) && !defined(sun)
+		if (0)
+#endif
+		{
+		    YieldControlNoInput(fd);
+		    return 0;
+		}
+	    }
+	    YieldControlDeath();
+	    return -1;
+	}
+	oci->bufcnt += result;
+	gotnow += result;
+	/* free up some space after huge requests */
+	if ((oci->size > BUFWATERMARK) &&
+	    (oci->bufcnt < BUFSIZE) && (needed < BUFSIZE))
+	{
+	    char *ibuf;
+
+	    ibuf = (char *)realloc(oci->buffer, BUFSIZE);
+	    if (ibuf)
+	    {
+		oci->size = BUFSIZE;
+		oci->buffer = ibuf;
+		oci->bufptr = ibuf + oci->bufcnt - gotnow;
+	    }
+	}
+	if (need_header && gotnow >= needed)
+	{
+	    /* We wanted an xReq, now we've gotten it. */
+	    request = (xReq *)oci->bufptr;
+	    needed = get_req_len(request, client);
+	    if (!needed && client->big_requests)
+	    {
+		move_header = TRUE;
+		if (gotnow < sizeof(xBigReq))
+		    needed = bytes_to_int32(sizeof(xBigReq));
+		else
+		    needed = get_big_req_len(request, client);
+	    }
+	    client->req_len = needed;
+	    needed <<= 2;
+	}
+	if (gotnow < needed)
+	{
+	    /* Still don't have enough; punt. */
+	    YieldControlNoInput(fd);
+	    return 0;
+	}
+    }
+    if (needed == 0)
+    {
+	if (client->big_requests)
+	    needed = sizeof(xBigReq);
+	else
+	    needed = sizeof(xReq);
+    }
+
+    /* If there are bytes to ignore, ignore them now. */
+
+    if (oci->ignoreBytes > 0) {
+	assert(needed == oci->ignoreBytes || needed == oci->size);
+	/*
+	 * The _XSERVTransRead call above may return more or fewer bytes than we
+	 * want to ignore.  Ignore the smaller of the two sizes.
+	 */
+	if (gotnow < needed) {
+	    oci->ignoreBytes -= gotnow;
+	    oci->bufptr += gotnow;
+	    gotnow = 0;
+	} else {
+	    oci->ignoreBytes -= needed;
+	    oci->bufptr += needed;
+	    gotnow -= needed;
+	}
+	needed = 0;
+    }
+
+    oci->lenLastReq = needed;
+
+    /*
+     *  Check to see if client has at least one whole request in the
+     *  buffer beyond the request we're returning to the caller.
+     *  If there is only a partial request, treat like buffer
+     *  is empty so that select() will be called again and other clients
+     *  can get into the queue.   
+     */
+
+    gotnow -= needed;
+    if (gotnow >= sizeof(xReq)) 
+    {
+	request = (xReq *)(oci->bufptr + needed);
+	if (gotnow >= (result = (get_req_len(request, client) << 2))
+	    && (result ||
+		(client->big_requests &&
+		 (gotnow >= sizeof(xBigReq) &&
+		  gotnow >= (get_big_req_len(request, client) << 2))))
+	    )
+	    FD_SET(fd, &ClientsWithInput);
+	else
+	{
+	    if (!SmartScheduleDisable)
+		FD_CLR(fd, &ClientsWithInput);
+	    else
+		YieldControlNoInput(fd);
+	}
+    }
+    else
+    {
+	if (!gotnow)
+	    AvailableInput = oc;
+	if (!SmartScheduleDisable)
+	    FD_CLR(fd, &ClientsWithInput);
+	else
+	    YieldControlNoInput(fd);
+    }
+    if (SmartScheduleDisable)
+    if (++timesThisConnection >= MAX_TIMES_PER)
+	YieldControl();
+    if (move_header)
+    {
+	request = (xReq *)oci->bufptr;
+	oci->bufptr += (sizeof(xBigReq) - sizeof(xReq));
+	*(xReq *)oci->bufptr = *request;
+	oci->lenLastReq -= (sizeof(xBigReq) - sizeof(xReq));
+	client->req_len -= bytes_to_int32(sizeof(xBigReq) - sizeof(xReq));
+    }
+    client->requestBuffer = (pointer)oci->bufptr;
+#ifdef DEBUG_COMMUNICATION
+    {
+	xReq *req = client->requestBuffer;
+	ErrorF("REQUEST: ClientIDX: %i, type: 0x%x data: 0x%x len: %i\n",
+	       client->index,req->reqType,req->data,req->length);
+    }
+#endif
+    return needed;
+}
+
+/*****************************************************************
+ * InsertFakeRequest
+ *    Splice a consed up (possibly partial) request in as the next request.
+ *
+ **********************/
+
+Bool
+InsertFakeRequest(ClientPtr client, char *data, int count)
+{
+    OsCommPtr oc = (OsCommPtr)client->osPrivate;
+    ConnectionInputPtr oci = oc->input;
+    int fd = oc->fd;
+    int gotnow, moveup;
+
+    if (AvailableInput)
+    {
+	if (AvailableInput != oc)
+	{
+	    ConnectionInputPtr aci = AvailableInput->input;
+	    if (aci->size > BUFWATERMARK)
+	    {
+		free(aci->buffer);
+		free(aci);
+	    }
+	    else
+	    {
+		aci->next = FreeInputs;
+		FreeInputs = aci;
+	    }
+	    AvailableInput->input = (ConnectionInputPtr)NULL;
+	}
+	AvailableInput = (OsCommPtr)NULL;
+    }
+    if (!oci)
+    {
+	if ((oci = FreeInputs))
+	    FreeInputs = oci->next;
+	else if (!(oci = AllocateInputBuffer()))
+	    return FALSE;
+	oc->input = oci;
+    }
+    oci->bufptr += oci->lenLastReq;
+    oci->lenLastReq = 0;
+    gotnow = oci->bufcnt + oci->buffer - oci->bufptr;
+    if ((gotnow + count) > oci->size)
+    {
+	char *ibuf;
+
+	ibuf = (char *)realloc(oci->buffer, gotnow + count);
+	if (!ibuf)
+	    return FALSE;
+	oci->size = gotnow + count;
+	oci->buffer = ibuf;
+	oci->bufptr = ibuf + oci->bufcnt - gotnow;
+    }
+    moveup = count - (oci->bufptr - oci->buffer);
+    if (moveup > 0)
+    {
+	if (gotnow > 0)
+	    memmove(oci->bufptr + moveup, oci->bufptr, gotnow);
+	oci->bufptr += moveup;
+	oci->bufcnt += moveup;
+    }
+    memmove(oci->bufptr - count, data, count);
+    oci->bufptr -= count;
+    gotnow += count;
+    if ((gotnow >= sizeof(xReq)) &&
+	(gotnow >= (int)(get_req_len((xReq *)oci->bufptr, client) << 2)))
+	FD_SET(fd, &ClientsWithInput);
+    else
+	YieldControlNoInput(fd);
+    return TRUE;
+}
+
+/*****************************************************************
+ * ResetRequestFromClient
+ *    Reset to reexecute the current request, and yield.
+ *
+ **********************/
+
+void
+ResetCurrentRequest(ClientPtr client)
+{
+    OsCommPtr oc = (OsCommPtr)client->osPrivate;
+    register ConnectionInputPtr oci = oc->input;
+    int fd = oc->fd;
+    register xReq *request;
+    int gotnow, needed;
+    if (AvailableInput == oc)
+	AvailableInput = (OsCommPtr)NULL;
+    oci->lenLastReq = 0;
+    gotnow = oci->bufcnt + oci->buffer - oci->bufptr;
+    if (gotnow < sizeof(xReq))
+    {
+	YieldControlNoInput(fd);
+    }
+    else
+    {
+	request = (xReq *)oci->bufptr;
+	needed = get_req_len(request, client);
+	if (!needed && client->big_requests)
+	{
+	    oci->bufptr -= sizeof(xBigReq) - sizeof(xReq);
+	    *(xReq *)oci->bufptr = *request;
+	    ((xBigReq *)oci->bufptr)->length = client->req_len;
+	    if (client->swapped)
+	    {
+		swapl(&((xBigReq *)oci->bufptr)->length);
+	    }
+	}
+	if (gotnow >= (needed << 2))
+	{
+	    if (FD_ISSET(fd, &AllClients))
+	    {
+		FD_SET(fd, &ClientsWithInput);
+	    }
+	    else
+	    {
+		FD_SET(fd, &IgnoredClientsWithInput);
+	    }
+	    YieldControl();
+	}
+	else
+	    YieldControlNoInput(fd);
+    }
+}
+
+static const int padlength[4] = {0, 3, 2, 1};
+
+ /********************
+ * FlushAllOutput()
+ *    Flush all clients with output.  However, if some client still
+ *    has input in the queue (more requests), then don't flush.  This
+ *    will prevent the output queue from being flushed every time around
+ *    the round robin queue.  Now, some say that it SHOULD be flushed
+ *    every time around, but...
+ *
+ **********************/
+
+void
+FlushAllOutput(void)
+{
+    register int index, base;
+    register fd_mask mask; /* raphael */
+    OsCommPtr oc;
+    register ClientPtr client;
+    Bool newoutput = NewOutputPending;
+#if defined(WIN32)
+    fd_set newOutputPending;
+#endif
+
+    if (FlushCallback)
+	CallCallbacks(&FlushCallback, NULL);
+
+    if (!newoutput)
+	return;
+
+    /*
+     * It may be that some client still has critical output pending,
+     * but he is not yet ready to receive it anyway, so we will
+     * simply wait for the select to tell us when he's ready to receive.
+     */
+    CriticalOutputPending = FALSE;
+    NewOutputPending = FALSE;
+
+#ifndef WIN32
+    for (base = 0; base < howmany(XFD_SETSIZE, NFDBITS); base++)
+    {
+	mask = OutputPending.fds_bits[ base ];
+	OutputPending.fds_bits[ base ] = 0;
+	while (mask)
+	{
+	    index = ffs(mask) - 1;
+	    mask &= ~lowbit(mask);
+	    if ((index = ConnectionTranslation[(base * (sizeof(fd_mask)*8)) + index]) == 0)
+		continue;
+	    client = clients[index];
+	    if (client->clientGone)
+		continue;
+	    oc = (OsCommPtr)client->osPrivate;
+	    if (FD_ISSET(oc->fd, &ClientsWithInput))
+	    {
+		FD_SET(oc->fd, &OutputPending); /* set the bit again */
+		NewOutputPending = TRUE;
+	    }
+	    else
+		(void)FlushClient(client, oc, (char *)NULL, 0);
+	}
+    }
+#else  /* WIN32 */
+    FD_ZERO(&newOutputPending);
+    for (base = 0; base < XFD_SETCOUNT(&OutputPending); base++)
+    {
+	    index = XFD_FD(&OutputPending, base);
+	    if ((index = GetConnectionTranslation(index)) == 0)
+		continue;
+	    client = clients[index];
+	    if (client->clientGone)
+		continue;
+	    oc = (OsCommPtr)client->osPrivate;
+	    if (FD_ISSET(oc->fd, &ClientsWithInput))
+	    {
+		FD_SET(oc->fd, &newOutputPending); /* set the bit again */
+		NewOutputPending = TRUE;
+	    }
+	    else
+		(void)FlushClient(client, oc, (char *)NULL, 0);
+    }
+    XFD_COPYSET(&newOutputPending, &OutputPending);
+#endif /* WIN32 */
+}
+
+void
+FlushIfCriticalOutputPending(void)
+{
+    if (CriticalOutputPending)
+	FlushAllOutput();
+}
+
+void
+SetCriticalOutputPending(void)
+{
+    CriticalOutputPending = TRUE;
+}
+
+/*****************
+ * WriteToClient
+ *    Copies buf into ClientPtr.buf if it fits (with padding), else
+ *    flushes ClientPtr.buf and buf to client.  As of this writing,
+ *    every use of WriteToClient is cast to void, and the result
+ *    is ignored.  Potentially, this could be used by requests
+ *    that are sending several chunks of data and want to break
+ *    out of a loop on error.  Thus, we will leave the type of
+ *    this routine as int.
+ *****************/
+
+int
+WriteToClient (ClientPtr who, int count, const void *__buf)
+{
+    OsCommPtr oc;
+    ConnectionOutputPtr oco;
+    int padBytes;
+    const char *buf = __buf;
+#ifdef DEBUG_COMMUNICATION
+    Bool multicount = FALSE;
+#endif
+    if (!count || !who || who == serverClient || who->clientGone)
+	return 0;
+    oc = who->osPrivate;
+    oco = oc->output;
+#ifdef DEBUG_COMMUNICATION
+    {
+	char info[128];
+	xError *err;
+	xGenericReply *rep;
+	xEvent *ev;
+	
+	if (!who->replyBytesRemaining) {
+	    switch(buf[0]) {
+	    case X_Reply:
+		rep = (xGenericReply*)buf;
+		if (rep->sequenceNumber == who->sequence) {
+		    snprintf(info,127,"Xreply: type: 0x%x data: 0x%x "
+			     "len: %i seq#: 0x%x", rep->type, rep->data1,
+			     rep->length, rep->sequenceNumber);
+		    multicount = TRUE;
+		}
+		break;
+	    case X_Error:
+		err = (xError*)buf;
+		snprintf(info,127,"Xerror: Code: 0x%x resID: 0x%x maj: 0x%x "
+			 "min: %x", err->errorCode,err->resourceID,
+			 err->minorCode,err->majorCode);
+		break;
+	    default:
+		if ((buf[0] & 0x7f) == KeymapNotify) 
+		    snprintf(info,127,"KeymapNotifyEvent: %i",buf[0]);
+		else {
+		    ev = (xEvent*)buf;
+		    snprintf(info,127,"XEvent: type: 0x%x detail: 0x%x "
+			     "seq#: 0x%x",  ev->u.u.type, ev->u.u.detail,
+			     ev->u.u.sequenceNumber);
+		}
+	    }
+	    ErrorF("REPLY: ClientIDX: %i %s\n",who->index, info);
+	} else
+	    multicount = TRUE;
+    }
+#endif
+
+    if (!oco)
+    {
+	if ((oco = FreeOutputs))
+	{
+	    FreeOutputs = oco->next;
+	}
+	else if (!(oco = AllocateOutputBuffer()))
+	{
+	    if (oc->trans_conn) {
+		_XSERVTransDisconnect(oc->trans_conn);
+		_XSERVTransClose(oc->trans_conn);
+		oc->trans_conn = NULL;
+	    }
+	    MarkClientException(who);
+	    return -1;
+	}
+	oc->output = oco;
+    }
+
+    padBytes = padlength[count & 3];
+
+    if(ReplyCallback)
+    {
+        ReplyInfoRec replyinfo;
+
+	replyinfo.client = who;
+	replyinfo.replyData = buf;
+	replyinfo.dataLenBytes = count + padBytes;
+	if (who->replyBytesRemaining)
+	{ /* still sending data of an earlier reply */
+	    who->replyBytesRemaining -= count + padBytes;
+	    replyinfo.startOfReply = FALSE;
+	    replyinfo.bytesRemaining = who->replyBytesRemaining;
+	    CallCallbacks((&ReplyCallback), (pointer)&replyinfo);
+	}
+	else if (who->clientState == ClientStateRunning
+		 && buf[0] == X_Reply)
+        { /* start of new reply */
+	    CARD32 replylen;
+	    unsigned long bytesleft;
+
+	    replylen = ((xGenericReply *)buf)->length;
+	    if (who->swapped)
+		swapl(&replylen);
+	    bytesleft = (replylen * 4) + SIZEOF(xReply) - count - padBytes;
+	    replyinfo.startOfReply = TRUE;
+	    replyinfo.bytesRemaining = who->replyBytesRemaining = bytesleft;
+	    CallCallbacks((&ReplyCallback), (pointer)&replyinfo);
+	} 	                      
+    }
+#ifdef DEBUG_COMMUNICATION
+    else if (multicount) {
+	if (who->replyBytesRemaining) {
+	    who->replyBytesRemaining -= (count + padBytes);
+	} else {
+	    CARD32 replylen;
+	    replylen = ((xGenericReply *)buf)->length;
+	    who->replyBytesRemaining =
+		(replylen * 4) + SIZEOF(xReply) - count - padBytes;
+	}
+    }
+#endif
+    if (oco->count + count + padBytes > oco->size)
+    {
+	FD_CLR(oc->fd, &OutputPending);
+	if(!XFD_ANYSET(&OutputPending)) {
+	  CriticalOutputPending = FALSE;
+	  NewOutputPending = FALSE;
+	}
+
+	if (FlushCallback)
+	    CallCallbacks(&FlushCallback, NULL);
+
+	return FlushClient(who, oc, buf, count);
+    }
+
+    NewOutputPending = TRUE;
+    FD_SET(oc->fd, &OutputPending);
+    memmove((char *)oco->buf + oco->count, buf, count);
+    oco->count += count + padBytes;
+    return count;
+}
+
+ /********************
+ * FlushClient()
+ *    If the client isn't keeping up with us, then we try to continue
+ *    buffering the data and set the apropriate bit in ClientsWritable
+ *    (which is used by WaitFor in the select).  If the connection yields
+ *    a permanent error, or we can't allocate any more space, we then
+ *    close the connection.
+ *
+ **********************/
+
+int
+FlushClient(ClientPtr who, OsCommPtr oc, const void *__extraBuf, int extraCount)
+{
+    ConnectionOutputPtr oco = oc->output;
+    int connection = oc->fd;
+    XtransConnInfo trans_conn = oc->trans_conn;
+    struct iovec iov[3];
+    static char padBuffer[3];
+    const char *extraBuf = __extraBuf;
+    long written;
+    long padsize;
+    long notWritten;
+    long todo;
+
+    if (!oco)
+	return 0;
+    written = 0;
+    padsize = padlength[extraCount & 3];
+    notWritten = oco->count + extraCount + padsize;
+    todo = notWritten;
+    while (notWritten) {
+	long before = written;	/* amount of whole thing written */
+	long remain = todo;	/* amount to try this time, <= notWritten */
+	int i = 0;
+	long len;
+	
+	/* You could be very general here and have "in" and "out" iovecs
+	 * and write a loop without using a macro, but what the heck.  This
+	 * translates to:
+	 *
+	 *     how much of this piece is new?
+	 *     if more new then we are trying this time, clamp
+	 *     if nothing new
+	 *         then bump down amount already written, for next piece
+	 *         else put new stuff in iovec, will need all of next piece
+	 *
+	 * Note that todo had better be at least 1 or else we'll end up
+	 * writing 0 iovecs.
+	 */
+#define InsertIOV(pointer, length) \
+	len = (length) - before; \
+	if (len > remain) \
+	    len = remain; \
+	if (len <= 0) { \
+	    before = (-len); \
+	} else { \
+	    iov[i].iov_len = len; \
+	    iov[i].iov_base = (pointer) + before;	\
+	    i++; \
+	    remain -= len; \
+	    before = 0; \
+	}
+
+	InsertIOV ((char *)oco->buf, oco->count)
+	InsertIOV ((char *)extraBuf, extraCount)
+	InsertIOV (padBuffer, padsize)
+
+	errno = 0;
+	if (trans_conn && (len = _XSERVTransWritev(trans_conn, iov, i)) >= 0)
+	{
+	    written += len;
+	    notWritten -= len;
+	    todo = notWritten;
+	}
+	else if (ETEST(errno)
+#ifdef SUNSYSV /* check for another brain-damaged OS bug */
+		 || (errno == 0)
+#endif
+#ifdef EMSGSIZE /* check for another brain-damaged OS bug */
+		 || ((errno == EMSGSIZE) && (todo == 1))
+#endif
+		)
+	{
+	    /* If we've arrived here, then the client is stuffed to the gills
+	       and not ready to accept more.  Make a note of it and buffer
+	       the rest. */
+		errno=0;
+	    FD_SET(connection, &ClientsWriteBlocked);
+	    AnyClientsWriteBlocked = TRUE;
+
+	    if (written < oco->count)
+	    {
+		if (written > 0)
+		{
+		    oco->count -= written;
+		    memmove((char *)oco->buf,
+			    (char *)oco->buf + written,
+			  oco->count);
+		    written = 0;
+		}
+	    }
+	    else
+	    {
+		written -= oco->count;
+		oco->count = 0;
+	    }
+
+	    if (notWritten > oco->size)
+	    {
+		unsigned char *obuf;
+
+		obuf = (unsigned char *)realloc(oco->buf,
+						 notWritten + BUFSIZE);
+		if (!obuf)
+		{
+		    _XSERVTransDisconnect(oc->trans_conn);
+		    _XSERVTransClose(oc->trans_conn);
+		    oc->trans_conn = NULL;
+		    MarkClientException(who);
+		    oco->count = 0;
+		    return -1;
+		}
+		oco->size = notWritten + BUFSIZE;
+		oco->buf = obuf;
+	    }
+
+	    /* If the amount written extended into the padBuffer, then the
+	       difference "extraCount - written" may be less than 0 */
+	    if ((len = extraCount - written) > 0)
+		memmove ((char *)oco->buf + oco->count,
+			 extraBuf + written,
+		       len);
+
+	    oco->count = notWritten; /* this will include the pad */
+	    /* return only the amount explicitly requested */
+	    return extraCount;
+	}
+#ifdef EMSGSIZE /* check for another brain-damaged OS bug */
+	else if (errno == EMSGSIZE)
+	{
+	    todo >>= 1;
+	}
+#endif
+	else
+	{
+	    if (oc->trans_conn)
+	    {
+		_XSERVTransDisconnect(oc->trans_conn);
+		_XSERVTransClose(oc->trans_conn);
+		oc->trans_conn = NULL;
+	    }
+	    MarkClientException(who);
+	    oco->count = 0;
+	    return -1;
+	}
+    }
+
+    /* everything was flushed out */
+    oco->count = 0;
+    /* check to see if this client was write blocked */
+    if (AnyClientsWriteBlocked)
+    {
+	FD_CLR(oc->fd, &ClientsWriteBlocked);
+ 	if (! XFD_ANYSET(&ClientsWriteBlocked))
+	    AnyClientsWriteBlocked = FALSE;
+    }
+    if (oco->size > BUFWATERMARK)
+    {
+	free(oco->buf);
+	free(oco);
+    }
+    else
+    {
+	oco->next = FreeOutputs;
+	FreeOutputs = oco;
+    }
+    oc->output = (ConnectionOutputPtr)NULL;
+    return extraCount; /* return only the amount explicitly requested */
+}
+
+static ConnectionInputPtr
+AllocateInputBuffer(void)
+{
+    ConnectionInputPtr oci;
+
+    oci = malloc(sizeof(ConnectionInput));
+    if (!oci)
+	return NULL;
+    oci->buffer = malloc(BUFSIZE);
+    if (!oci->buffer)
+    {
+	free(oci);
+	return NULL;
+    }
+    oci->size = BUFSIZE;
+    oci->bufptr = oci->buffer;
+    oci->bufcnt = 0;
+    oci->lenLastReq = 0;
+    oci->ignoreBytes = 0;
+    return oci;
+}
+
+static ConnectionOutputPtr
+AllocateOutputBuffer(void)
+{
+    ConnectionOutputPtr oco;
+
+    oco = malloc(sizeof(ConnectionOutput));
+    if (!oco)
+	return NULL;
+    oco->buf = calloc(1, BUFSIZE);
+    if (!oco->buf)
+    {
+	free(oco);
+	return NULL;
+    }
+    oco->size = BUFSIZE;
+    oco->count = 0;
+    return oco;
+}
+
+void
+FreeOsBuffers(OsCommPtr oc)
+{
+    ConnectionInputPtr oci;
+    ConnectionOutputPtr oco;
+
+    if (AvailableInput == oc)
+	AvailableInput = (OsCommPtr)NULL;
+    if ((oci = oc->input))
+    {
+	if (FreeInputs)
+	{
+	    free(oci->buffer);
+	    free(oci);
+	}
+	else
+	{
+	    FreeInputs = oci;
+	    oci->next = (ConnectionInputPtr)NULL;
+	    oci->bufptr = oci->buffer;
+	    oci->bufcnt = 0;
+	    oci->lenLastReq = 0;
+	}
+    }
+    if ((oco = oc->output))
+    {
+	if (FreeOutputs)
+	{
+	    free(oco->buf);
+	    free(oco);
+	}
+	else
+	{
+	    FreeOutputs = oco;
+	    oco->next = (ConnectionOutputPtr)NULL;
+	    oco->count = 0;
+	}
+    }
+}
+
+void
+ResetOsBuffers(void)
+{
+    ConnectionInputPtr oci;
+    ConnectionOutputPtr oco;
+
+    while ((oci = FreeInputs))
+    {
+	FreeInputs = oci->next;
+	free(oci->buffer);
+	free(oci);
+    }
+    while ((oco = FreeOutputs))
+    {
+	FreeOutputs = oco->next;
+	free(oco->buf);
+	free(oco);
+    }
+}