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/*
* libosengine - A synchronization engine for the opensync framework
* Copyright (C) 2004-2005 Armin Bauer <armin.bauer@opensync.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "engine.h"
#include "engine_internals.h"
OSyncFlag *osync_flag_new(OSyncFlag *parent)
{
OSyncFlag *flag = g_malloc0(sizeof(OSyncFlag));
flag->is_set = FALSE;
if (parent) {
flag->comb_flag = parent;
parent->num_not_set++;
osync_flag_calculate_comb(parent);
}
return flag;
}
void osync_flag_free(OSyncFlag *flag)
{
g_free(flag);
}
OSyncFlag *osync_comb_flag_new(osync_bool any, osync_bool default_val)
{
OSyncFlag *flag = osync_flag_new(NULL);
flag->is_comb = TRUE;
flag->is_any = any;
flag->default_val = default_val;
flag->is_set = default_val;
return flag;
}
void osync_flag_attach(OSyncFlag *flag, OSyncFlag *target)
{
if (flag->comb_flag)
return;
g_assert(target->is_comb);
flag->comb_flag = target;
if (flag->is_set) {
target->num_set++;
} else {
target->num_not_set++;
}
osync_flag_calculate_comb(target);
}
osync_bool osync_flag_is_attached(OSyncFlag *flag)
{
if (flag->comb_flag)
return TRUE;
return FALSE;
}
void osync_flag_detach(OSyncFlag *flag)
{
OSyncFlag *target = flag->comb_flag;
if (!target)
return;
if (flag->is_set) {
target->num_set--;
} else {
target->num_not_set--;
}
flag->comb_flag = NULL;
osync_flag_calculate_comb(target);
}
void osync_flag_set_pos_trigger(OSyncFlag *flag, OSyncFlagTriggerFunc func, void *data1, void *data2)
{
flag->pos_trigger_func = func;
flag->pos_user_data1 = data1;
flag->pos_user_data2 = data2;
}
void osync_flag_set_neg_trigger(OSyncFlag *flag, OSyncFlagTriggerFunc func, void *data1, void *data2)
{
flag->neg_trigger_func = func;
flag->neg_user_data1 = data1;
flag->neg_user_data2 = data2;
}
void osync_flag_calculate_comb(OSyncFlag *flag)
{
if (!flag->is_comb)
return;
if (!flag->num_not_set && !flag->num_set) {
if (flag->default_val)
osync_flag_set(flag);
else
osync_flag_unset(flag);
return;
}
if (!flag->is_any) {
if (!flag->num_not_set && flag->num_set) {
osync_flag_set(flag);
} else {
osync_flag_unset(flag);
}
} else {
if (flag->num_set) {
osync_flag_set(flag);
} else {
osync_flag_unset(flag);
}
}
}
osync_bool osync_flag_is_set(OSyncFlag *flag)
{
if (flag->is_set == TRUE && flag->is_changing == FALSE)
return TRUE;
return FALSE;
}
osync_bool osync_flag_is_not_set(OSyncFlag *flag)
{
if (flag->is_set == FALSE && flag->is_changing == FALSE)
return TRUE;
return FALSE;
}
void osync_comb_flag_update(OSyncFlag *combflag, OSyncFlag *flag, osync_bool prev_state)
{
if (prev_state == flag->is_set)
return;
if (flag->is_set) {
combflag->num_not_set--;
combflag->num_set++;
} else {
combflag->num_not_set++;
combflag->num_set--;
}
}
void osync_flag_changing(OSyncFlag *flag)
{
flag->is_changing = TRUE;
}
void osync_flag_cancel(OSyncFlag *flag)
{
flag->is_changing = FALSE;
}
void osync_flag_unset(OSyncFlag *flag)
{
osync_bool oldstate = flag->is_set;
flag->is_set = FALSE;
flag->is_changing = FALSE;
osync_flag_calc_trigger(flag, oldstate);
if (flag->comb_flag) {
osync_comb_flag_update(flag->comb_flag, flag, oldstate);
osync_flag_calculate_comb(flag->comb_flag);
}
}
void osync_flag_set(OSyncFlag *flag)
{
osync_bool oldstate = flag->is_set;
flag->is_set = TRUE;
flag->is_changing = FALSE;
osync_flag_calc_trigger(flag, oldstate);
if (flag->comb_flag) {
osync_comb_flag_update(flag->comb_flag, flag, oldstate);
osync_flag_calculate_comb(flag->comb_flag);
}
}
void osync_flag_set_state(OSyncFlag *flag, osync_bool state)
{
osync_bool oldstate = flag->is_set;
flag->is_set = state;
flag->is_changing = FALSE;
if (flag->comb_flag) {
osync_comb_flag_update(flag->comb_flag, flag, oldstate);
}
if (flag->is_comb) {
//flag->num_not_set = 0;
//flag->num_set = 0;
}
}
osync_bool osync_flag_get_state(OSyncFlag *flag)
{
return flag->is_set;
}
void osync_flag_calc_trigger(OSyncFlag *flag, osync_bool oldstate)
{
if (flag->is_set != oldstate) {
if (flag->is_set == TRUE) {
if (flag->pos_trigger_func) {
flag->pos_trigger_func(flag->pos_user_data1, flag->pos_user_data2);
}
} else {
if (flag->neg_trigger_func) {
flag->neg_trigger_func(flag->neg_user_data1, flag->neg_user_data2);
}
}
}
}
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