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/*
* ustp - OpenWrt STP/RSTP/MSTP daemon
* Copyright (C) 2021 Felix Fietkau <nbd@nbd.name>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation
*
* 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.
*/
#include <pthread.h>
#include <string.h>
#include <stdlib.h>
#include <libubox/uloop.h>
#include <libubox/utils.h>
#include "worker.h"
#include "bridge_ctl.h"
#include "bridge_track.h"
#include "packet.h"
static pthread_t w_thread;
static pthread_mutex_t w_lock = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t w_cond = PTHREAD_COND_INITIALIZER;
static LIST_HEAD(w_queue);
static struct uloop_timeout w_timer;
struct worker_queued_event {
struct list_head list;
struct worker_event ev;
};
static struct worker_event *worker_next_event(void)
{
struct worker_queued_event *ev;
static struct worker_event ev_data;
pthread_mutex_lock(&w_lock);
while (list_empty(&w_queue))
pthread_cond_wait(&w_cond, &w_lock);
ev = list_first_entry(&w_queue, struct worker_queued_event, list);
list_del(&ev->list);
pthread_mutex_unlock(&w_lock);
memcpy(&ev_data, &ev->ev, sizeof(ev_data));
free(ev);
return &ev_data;
}
static void
handle_worker_event(struct worker_event *ev)
{
switch (ev->type) {
case WORKER_EV_ONE_SECOND:
bridge_one_second();
break;
case WORKER_EV_BRIDGE_EVENT:
bridge_event_handler();
break;
case WORKER_EV_RECV_PACKET:
packet_rcv();
break;
case WORKER_EV_BRIDGE_ADD:
bridge_create(ev->bridge_idx, &ev->bridge_config);
break;
case WORKER_EV_BRIDGE_REMOVE:
bridge_delete(ev->bridge_idx);
break;
default:
return;
}
}
static void *worker_thread_fn(void *arg)
{
struct worker_event *ev;
while (1) {
ev = worker_next_event();
if (ev->type == WORKER_EV_SHUTDOWN)
break;
handle_worker_event(ev);
}
return NULL;
}
static void worker_timer_cb(struct uloop_timeout *t)
{
struct worker_event ev = {
.type = WORKER_EV_ONE_SECOND,
};
uloop_timeout_set(t, 1000);
worker_queue_event(&ev);
}
int worker_init(void)
{
w_timer.cb = worker_timer_cb;
uloop_timeout_set(&w_timer, 1000);
return pthread_create(&w_thread, NULL, worker_thread_fn, NULL);
}
void worker_cleanup(void)
{
struct worker_event ev = {
.type = WORKER_EV_SHUTDOWN,
};
worker_queue_event(&ev);
pthread_join(w_thread, NULL);
}
void worker_queue_event(struct worker_event *ev)
{
struct worker_queued_event *evc;
evc = malloc(sizeof(*evc));
memcpy(&evc->ev, ev, sizeof(*ev));
pthread_mutex_lock(&w_lock);
list_add_tail(&evc->list, &w_queue);
pthread_mutex_unlock(&w_lock);
pthread_cond_signal(&w_cond);
}
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