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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
* Copyright 2011-2014 Pierre Ossman for Cendio AB
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <errno.h>
#include <X11/Xpoll.h>
#include "dix.h"
#include "scrnintstr.h"
#include "vncExtInit.h"
#include "vncBlockHandler.h"
#include "xorg-version.h"
#if XORG >= 119
static void vncBlockHandler(void* data, void* timeout)
{
vncCallBlockHandlers(timeout);
}
void vncRegisterBlockHandlers(void)
{
if (!RegisterBlockAndWakeupHandlers(vncBlockHandler,
(ServerWakeupHandlerProcPtr)NoopDDA, 0))
FatalError("RegisterBlockAndWakeupHandlers() failed\n");
}
#else
static void vncBlockHandler(void * data, OSTimePtr t, void * readmask);
static void vncWakeupHandler(void * data, int nfds, void * readmask);
void vncWriteBlockHandler(fd_set *fds);
void vncWriteWakeupHandler(int nfds, fd_set *fds);
void vncRegisterBlockHandlers(void)
{
if (!RegisterBlockAndWakeupHandlers(vncBlockHandler, vncWakeupHandler, 0))
FatalError("RegisterBlockAndWakeupHandlers() failed\n");
}
static void vncWriteBlockHandlerFallback(OSTimePtr timeout);
static void vncWriteWakeupHandlerFallback(void);
//
// vncBlockHandler - called just before the X server goes into select(). Call
// on to the block handler for each desktop. Then check whether any of the
// selections have changed, and if so, notify any interested X clients.
//
static void vncBlockHandler(void * data, OSTimePtr timeout, void * readmask)
{
fd_set* fds = (fd_set*)readmask;
vncWriteBlockHandlerFallback(timeout);
vncCallReadBlockHandlers(fds, timeout);
}
static void vncWakeupHandler(void * data, int nfds, void * readmask)
{
fd_set* fds = (fd_set*)readmask;
vncCallReadWakeupHandlers(fds, nfds);
vncWriteWakeupHandlerFallback();
}
//
// vncWriteBlockHandler - extra hack to be able to get the main select loop
// to monitor writeable fds and not just readable. This requirers a modified
// Xorg and might therefore not be called. When it is called though, it will
// do so before vncBlockHandler (and vncWriteWakeupHandler called after
// vncWakeupHandler).
//
static Bool needFallback = TRUE;
static fd_set fallbackFds;
static struct timeval tw;
void vncWriteBlockHandler(fd_set *fds)
{
struct timeval *dummy;
needFallback = FALSE;
dummy = NULL;
vncCallWriteBlockHandlers(fds, &dummy);
}
void vncWriteWakeupHandler(int nfds, fd_set *fds)
{
vncCallWriteWakeupHandlers(fds, nfds);
}
static void vncWriteBlockHandlerFallback(OSTimePtr timeout)
{
if (!needFallback)
return;
FD_ZERO(&fallbackFds);
vncWriteBlockHandler(&fallbackFds);
// vncWriteBlockHandler() will clear this, so we need to restore it
needFallback = TRUE;
if (!XFD_ANYSET(&fallbackFds))
return;
if ((*timeout == NULL) ||
((*timeout)->tv_sec > 0) || ((*timeout)->tv_usec > 10000)) {
tw.tv_sec = 0;
tw.tv_usec = 10000;
*timeout = &tw;
}
}
static void vncWriteWakeupHandlerFallback(void)
{
int ret;
struct timeval timeout;
if (!needFallback)
return;
if (!XFD_ANYSET(&fallbackFds))
return;
timeout.tv_sec = 0;
timeout.tv_usec = 0;
ret = select(XFD_SETSIZE, NULL, &fallbackFds, NULL, &timeout);
if (ret < 0) {
ErrorF("vncWriteWakeupHandlerFallback(): select: %s\n",
strerror(errno));
return;
}
if (ret == 0)
return;
vncWriteWakeupHandler(ret, &fallbackFds);
}
#endif
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