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/***************************************************************************
* *
* Powersave Daemon *
* *
* Copyright (C) 2005 SUSE Linux Products GmbH *
* *
* Author(s): Holger Macht <hmacht@suse.de> *
* *
* This program 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 you *
* option) any later version. *
* *
* This program 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 program; if not, write to the Free Software Foundation, Inc., *
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA *
* *
***************************************************************************/
#include <signal.h>
#include <sched.h>
#include <errno.h>
#include <string.h>
#include "main_loop.h"
#include "powerlib.h"
#include "globals.h"
#include "cpufreq_management.h"
#include "event_management.h"
#include "apm.h"
using namespace Powersave::Globals;
/**** class Callback ****/
Callback::Callback() : interval(-1), function(NULL), id(-1)
{
}
Callback::Callback(int interval_, gboolean (*function_)(gpointer data)) :
interval(interval_), function(function_), id(-1)
{
}
/**** class MainLoop ****/
MainLoop::MainLoop() {
/* set up a new main loop with glib and the default context */
_gmain = g_main_loop_new(NULL, FALSE);
DBusConnection *dbus_connection = _dbus_server.openSystemConnection();
if ( dbus_connection == NULL ) {
pDebug(DBG_ERR,
"Error setting up connection to DBus system bus. Aborting...");
exit(1);
} else {
dbus_connection_setup_with_g_main(dbus_connection, NULL);
}
if (!hwEvent_connect()) {
pDebug(DBG_ERR, "Cannot access acpi/apm event file\n");
/* only try to reconnect if we have acpi. If /dev/apm_bios
is not there on startup, it won't appear later */
APM_Interface *p = dynamic_cast< APM_Interface* >(pm);
if (p == NULL) {
addCallback(3000, (GSourceFunc) hwEvent_reconnect);
}
}
// wait about 10 minutes for hal to appear
unsigned int waiting = 0;
while (!DBus_Server::serviceHasOwner("org.freedesktop.Hal")) {
/* give other processes a better chance to evolve */
if (sched_yield() != 0) {
pDebug(DBG_ERR, "Error while yielding scheduler: %s", strerror(errno));
}
sleep(3);
waiting++;
if (waiting > 200) {
pDebug(DBG_ERR, "Haldaemon did not appear. Aborting...");
kill(getpid(), SIGTERM);
}
}
setupCallbacks();
}
void MainLoop::run()
{
pDebug(DBG_INFO, "Starting main loop");
g_main_loop_run(_gmain);
}
void MainLoop::quit()
{
g_main_loop_quit(_gmain);
}
gboolean MainLoop::hwEvent_callback(GIOChannel *io_channel,
GIOCondition io_condition,
gpointer data)
{
int io_channel_fd = g_io_channel_unix_get_fd(io_channel);
if (io_condition & (G_IO_ERR | G_IO_HUP)) {
pDebug(DBG_ERR, "hw event socket broke away trying to reconnect...");
close(io_channel_fd);
main_loop->addCallback(3000, (GSourceFunc) hwEvent_reconnect);
return false;
}
pm->handleHWEventRequest(io_channel_fd);
return true;
}
gboolean MainLoop::hwEvent_reconnect(gpointer data)
{
if (hwEvent_connect()) {
pDebug(DBG_ERR, "Successfully reconnected to acpi/apm event file\n");
return false;
}
return true;
}
gboolean MainLoop::hwEvent_connect()
{
int hwEvent_fd = -1;
GIOChannel *hwEvent_channel;
int hwEvent_watch = -1;
/* set up the event interface. /proc/acpi/event or /dev/apm_bios */
if ((hwEvent_fd = pm->openHWEventFD()) < 0) {
return false;
} else {
hwEvent_channel = g_io_channel_unix_new(hwEvent_fd);
hwEvent_watch = g_io_add_watch(hwEvent_channel,
GIOCondition(G_IO_IN | G_IO_ERR | G_IO_HUP),
hwEvent_callback, NULL);
return true;
}
}
gboolean MainLoop::checkThrottling_callback(gpointer data)
{
if (config_obj->current_scheme->ALLOW_THROTTLING && !cpufreq->isSupported()) {
pm->checkThrottling();
return true;
}
return false;
}
gboolean MainLoop::checkEventTimeouts_callback(gpointer data)
{
return pm->_eM->checkEventTimeouts();
}
gboolean MainLoop::adjustSpeeds_callback(gpointer data)
{
if (cpufreq->hasControlMode(CPUFREQ_USERSPACE)) {
cpufreq->adjustSpeeds();
return true;
}
return false;
}
void MainLoop::setupCallbacks()
{
_callback_functions.push_back(
Callback(config_obj->current_scheme->POLL_INTERVAL,
checkThrottling_callback));
_callback_functions.push_back(
Callback(3000 ,checkEventTimeouts_callback));
_callback_functions.push_back(
Callback(config_obj->current_scheme->POLL_INTERVAL,
adjustSpeeds_callback));
updateCallbacks();
}
void MainLoop::updateCallbacks()
{
for (std::list<Callback>::iterator it = _callback_functions.begin();
it != _callback_functions.end(); ++it) {
if (g_main_context_find_source_by_id(NULL, it->id) == NULL) {
it->id = g_timeout_add(it->interval, it->function, NULL);
}
}
}
int MainLoop::addCallback(int interval, gboolean (*function)(gpointer data))
{
return g_timeout_add(interval, function, NULL);
}
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