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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <isc/app.h>
#include <isc/managers.h>
#include <isc/mem.h>
#include <isc/print.h>
#include <isc/string.h>
#include <isc/task.h>
#include <isc/time.h>
#include <isc/timer.h>
#include <isc/util.h>
typedef struct {
isc_mem_t *mctx;
isc_task_t *task;
isc_timer_t *timer;
unsigned int ticks;
char name[16];
bool exiting;
isc_task_t *peer;
} t_info;
#define MAX_TASKS 3
#define T2_SHUTDOWNOK (ISC_EVENTCLASS(1024) + 0)
#define T2_SHUTDOWNDONE (ISC_EVENTCLASS(1024) + 1)
#define FOO_EVENT (ISC_EVENTCLASS(1024) + 2)
static t_info tasks[MAX_TASKS];
static unsigned int task_count;
static isc_nm_t *netmgr = NULL;
static isc_taskmgr_t *taskmgr = NULL;
static isc_timermgr_t *timer_manager;
static void
t1_shutdown(isc_task_t *task, isc_event_t *event) {
t_info *info = event->ev_arg;
printf("task %s (%p) t1_shutdown\n", info->name, task);
isc_task_detach(&info->task);
isc_event_free(&event);
}
static void
t2_shutdown(isc_task_t *task, isc_event_t *event) {
t_info *info = event->ev_arg;
printf("task %s (%p) t2_shutdown\n", info->name, task);
info->exiting = true;
isc_event_free(&event);
}
static void
shutdown_action(isc_task_t *task, isc_event_t *event) {
t_info *info = event->ev_arg;
isc_event_t *nevent;
INSIST(event->ev_type == ISC_TASKEVENT_SHUTDOWN);
printf("task %s (%p) shutdown\n", info->name, task);
if (strcmp(info->name, "0") == 0) {
isc_timer_destroy(&info->timer);
nevent = isc_event_allocate(info->mctx, info, T2_SHUTDOWNOK,
t2_shutdown, &tasks[1],
sizeof(*event));
RUNTIME_CHECK(nevent != NULL);
info->exiting = true;
isc_task_sendanddetach(&info->peer, &nevent);
}
isc_event_free(&event);
}
static void
foo_event(isc_task_t *task, isc_event_t *event) {
printf("task(%p) foo\n", task);
isc_event_free(&event);
}
static void
tick(isc_task_t *task, isc_event_t *event) {
t_info *info = event->ev_arg;
isc_event_t *nevent;
INSIST(event->ev_type == ISC_TIMEREVENT_TICK);
printf("task %s (%p) tick\n", info->name, task);
info->ticks++;
if (strcmp(info->name, "1") == 0) {
if (info->ticks == 10) {
isc_app_shutdown();
} else if (info->ticks >= 15 && info->exiting) {
isc_timer_destroy(&info->timer);
isc_task_detach(&info->task);
nevent = isc_event_allocate(
info->mctx, info, T2_SHUTDOWNDONE, t1_shutdown,
&tasks[0], sizeof(*event));
RUNTIME_CHECK(nevent != NULL);
isc_task_send(info->peer, &nevent);
isc_task_detach(&info->peer);
}
} else if (strcmp(info->name, "foo") == 0) {
isc_timer_destroy(&info->timer);
nevent = isc_event_allocate(info->mctx, info, FOO_EVENT,
foo_event, task, sizeof(*event));
RUNTIME_CHECK(nevent != NULL);
isc_task_sendanddetach(&task, &nevent);
}
isc_event_free(&event);
}
static t_info *
new_task(isc_mem_t *mctx, const char *name) {
t_info *ti;
isc_time_t expires;
isc_interval_t interval;
RUNTIME_CHECK(task_count < MAX_TASKS);
ti = &tasks[task_count];
ti->mctx = mctx;
ti->task = NULL;
ti->timer = NULL;
ti->ticks = 0;
if (name != NULL) {
INSIST(strlen(name) < sizeof(ti->name));
strlcpy(ti->name, name, sizeof(ti->name));
} else {
snprintf(ti->name, sizeof(ti->name), "%u", task_count);
}
RUNTIME_CHECK(isc_task_create(taskmgr, 0, &ti->task) == ISC_R_SUCCESS);
RUNTIME_CHECK(isc_task_onshutdown(ti->task, shutdown_action, ti) ==
ISC_R_SUCCESS);
isc_time_settoepoch(&expires);
isc_interval_set(&interval, 1, 0);
RUNTIME_CHECK(isc_timer_create(timer_manager, isc_timertype_ticker,
&expires, &interval, ti->task, tick, ti,
&ti->timer) == ISC_R_SUCCESS);
task_count++;
return (ti);
}
int
main(int argc, char *argv[]) {
unsigned int workers;
t_info *t1, *t2 = NULL;
isc_task_t *task = NULL;
isc_mem_t *mctx = NULL, *mctx2 = NULL;
RUNTIME_CHECK(isc_app_start() == ISC_R_SUCCESS);
if (argc > 1) {
workers = atoi(argv[1]);
if (workers < 1) {
workers = 1;
}
if (workers > 8192) {
workers = 8192;
}
} else {
workers = 2;
}
printf("%u workers\n", workers);
isc_mem_create(&mctx);
isc_mem_create(&mctx2);
RUNTIME_CHECK(isc_managers_create(mctx, workers, 0, &netmgr,
&taskmgr) == ISC_R_SUCCESS);
RUNTIME_CHECK(isc_timermgr_create(mctx, &timer_manager) ==
ISC_R_SUCCESS);
t1 = new_task(mctx, NULL);
t2 = new_task(mctx2, NULL);
isc_task_attach(t2->task, &t1->peer);
isc_task_attach(t1->task, &t2->peer);
/*
* Test run-triggered shutdown.
*/
(void)new_task(mctx2, "foo");
/*
* Test implicit shutdown.
*/
RUNTIME_CHECK(isc_task_create(taskmgr, 0, &task) == ISC_R_SUCCESS);
isc_task_detach(&task);
/*
* Test anti-zombie code.
*/
RUNTIME_CHECK(isc_task_create(taskmgr, 0, &task) == ISC_R_SUCCESS);
isc_task_detach(&task);
RUNTIME_CHECK(isc_app_run() == ISC_R_SUCCESS);
isc_managers_destroy(&netmgr, &taskmgr);
isc_timermgr_destroy(&timer_manager);
printf("Statistics for mctx:\n");
isc_mem_stats(mctx, stdout);
isc_mem_destroy(&mctx);
printf("Statistics for mctx2:\n");
isc_mem_stats(mctx2, stdout);
isc_mem_destroy(&mctx2);
isc_app_finish();
return (0);
}
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