153 lines
3.5 KiB
C
153 lines
3.5 KiB
C
/*
|
|
* This file is part of MultiROM.
|
|
*
|
|
* MultiROM 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 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* MultiROM 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 MultiROM. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <pthread.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#include "util.h"
|
|
#include "workers.h"
|
|
#include "log.h"
|
|
#include "containers.h"
|
|
|
|
struct worker
|
|
{
|
|
void *data;
|
|
worker_call call;
|
|
};
|
|
|
|
struct worker_thread
|
|
{
|
|
pthread_t thread;
|
|
pthread_mutex_t mutex;
|
|
struct worker **workers;
|
|
volatile int run;
|
|
};
|
|
|
|
static struct worker_thread worker_thread = {
|
|
.mutex = PTHREAD_MUTEX_INITIALIZER,
|
|
.workers = NULL,
|
|
.run = 0,
|
|
};
|
|
|
|
#define SLEEP_CONST 10
|
|
static void *worker_thread_work(void *data)
|
|
{
|
|
struct worker_thread *t = (struct worker_thread*)data;
|
|
struct worker **w;
|
|
|
|
struct timespec last, curr;
|
|
uint32_t diff = 0, prev_sleep = 0;
|
|
clock_gettime(CLOCK_MONOTONIC, &last);
|
|
|
|
while(t->run)
|
|
{
|
|
pthread_mutex_lock(&t->mutex);
|
|
|
|
clock_gettime(CLOCK_MONOTONIC, &curr);
|
|
diff = timespec_diff(&last, &curr);
|
|
|
|
for(w = t->workers; w && *w;)
|
|
{
|
|
if((*w)->call(diff, (*w)->data))
|
|
w = list_rm_at(&worker_thread.workers, w - t->workers, &free);
|
|
else
|
|
++w;
|
|
}
|
|
|
|
pthread_mutex_unlock(&t->mutex);
|
|
|
|
last = curr;
|
|
if(diff <= SLEEP_CONST+prev_sleep)
|
|
{
|
|
prev_sleep = SLEEP_CONST+prev_sleep-diff;
|
|
usleep(prev_sleep*1000);
|
|
}
|
|
else
|
|
prev_sleep = 0;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
void workers_start(void)
|
|
{
|
|
if(worker_thread.run != 0)
|
|
return;
|
|
|
|
worker_thread.run = 1;
|
|
pthread_create(&worker_thread.thread, NULL, worker_thread_work, &worker_thread);
|
|
}
|
|
|
|
void workers_stop(void)
|
|
{
|
|
if(worker_thread.run != 1)
|
|
return;
|
|
|
|
worker_thread.run = 0;
|
|
pthread_join(worker_thread.thread, NULL);
|
|
|
|
list_clear(&worker_thread.workers, &free);
|
|
}
|
|
|
|
void workers_add(worker_call call, void *data)
|
|
{
|
|
if(worker_thread.run != 1)
|
|
{
|
|
ERROR("workers: adding worker when the thread isn't running'\n");
|
|
return;
|
|
}
|
|
|
|
struct worker *w = mzalloc(sizeof(struct worker));
|
|
w->call = call;
|
|
w->data = data;
|
|
|
|
pthread_mutex_lock(&worker_thread.mutex);
|
|
list_add(&worker_thread.workers, w);
|
|
pthread_mutex_unlock(&worker_thread.mutex);
|
|
}
|
|
|
|
void workers_remove(worker_call call, void *data)
|
|
{
|
|
if(worker_thread.run != 1)
|
|
{
|
|
ERROR("workers: removing worker when the thread isn't running'\n");
|
|
return;
|
|
}
|
|
|
|
pthread_mutex_lock(&worker_thread.mutex);
|
|
if(worker_thread.workers)
|
|
{
|
|
int i;
|
|
struct worker *w;
|
|
for(i = 0; worker_thread.workers[i]; ++i)
|
|
{
|
|
w = worker_thread.workers[i];
|
|
if(w->call == call && w->data == data)
|
|
{
|
|
list_rm_at(&worker_thread.workers, i, &free);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
pthread_mutex_unlock(&worker_thread.mutex);
|
|
}
|
|
|
|
pthread_t workers_get_thread_id(void)
|
|
{
|
|
return worker_thread.thread;
|
|
}
|