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/*
* runqueue-example.c
*
* Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include "uloop.h"
#include "runqueue.h"
static struct runqueue q;
struct sleeper {
int val;
bool kill;
struct uloop_timeout t;
struct runqueue_process proc;
};
static void q_empty(struct runqueue *q)
{
fprintf(stderr, "All done!\n");
uloop_end();
}
static const char* sleeper_type(struct sleeper *s)
{
return s->kill ? "killer" : "sleeper";
}
static void q_sleep_run(struct runqueue *q, struct runqueue_task *t)
{
struct sleeper *s = container_of(t, struct sleeper, proc.task);
char str[32];
pid_t pid;
fprintf(stderr, "[%d/%d] start 'sleep %d' (%s)\n", q->running_tasks,
q->max_running_tasks, s->val, sleeper_type(s));
pid = fork();
if (pid < 0)
return;
if (pid) {
runqueue_process_add(q, &s->proc, pid);
return;
}
sprintf(str, "%d", s->val);
execlp("sleep", "sleep", str, NULL);
exit(1);
}
static void q_sleep_cancel(struct runqueue *q, struct runqueue_task *t, int type)
{
struct sleeper *s = container_of(t, struct sleeper, proc.task);
fprintf(stderr, "[%d/%d] cancel 'sleep %d' (%s)\n", q->running_tasks,
q->max_running_tasks, s->val, sleeper_type(s));
runqueue_process_cancel_cb(q, t, type);
}
static void q_sleep_complete(struct runqueue *q, struct runqueue_task *p)
{
struct sleeper *s = container_of(p, struct sleeper, proc.task);
fprintf(stderr, "[%d/%d] finish 'sleep %d' (%s) \n", q->running_tasks,
q->max_running_tasks, s->val, sleeper_type(s));
free(s);
}
static void my_runqueue_process_kill_cb(struct runqueue *q, struct runqueue_task *p)
{
struct sleeper *s = container_of(p, struct sleeper, proc.task);
fprintf(stderr, "[%d/%d] killing process (%s)\n", q->running_tasks,
q->max_running_tasks, sleeper_type(s));
runqueue_process_kill_cb(q, p);
}
static void timer_cb(struct uloop_timeout *t)
{
struct sleeper *s = container_of(t, struct sleeper, t);
if (s->kill)
runqueue_task_kill(&s->proc.task);
}
static struct sleeper* create_sleeper(int val, const struct runqueue_task_type *type, bool kill)
{
struct sleeper *s = calloc(1, sizeof(*s));
s->kill = kill;
s->t.cb = timer_cb;
s->proc.task.type = type;
s->proc.task.run_timeout = 500;
s->proc.task.complete = q_sleep_complete;
s->val = val;
return s;
}
static void add_sleeper(int val)
{
static const struct runqueue_task_type sleeper_type = {
.run = q_sleep_run,
.cancel = q_sleep_cancel,
.kill = runqueue_process_kill_cb,
};
static const struct runqueue_task_type killer_type = {
.run = q_sleep_run,
.cancel = q_sleep_cancel,
.kill = my_runqueue_process_kill_cb,
};
struct sleeper *k = create_sleeper(val, &killer_type, true);
uloop_timeout_set(&k->t, 10);
uloop_timeout_add(&k->t);
runqueue_task_add(&q, &k->proc.task, false);
struct sleeper *s = create_sleeper(val, &sleeper_type, false);
runqueue_task_add(&q, &s->proc.task, false);
}
int main(int argc, char **argv)
{
uloop_init();
runqueue_init(&q);
q.empty_cb = q_empty;
q.max_running_tasks = 1;
if (argc > 1)
q.max_running_tasks = atoi(argv[1]);
add_sleeper(1);
add_sleeper(1);
add_sleeper(1);
uloop_run();
uloop_done();
return 0;
}
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