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/* Copyright (C) 2021 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
This program 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.
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.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <tap/basic.h>
#include <errno.h>
#include <pthread.h>
#include <sched.h>
#include <signal.h>
#include <time.h>
#include "knot/worker/pool.h"
#include "knot/worker/queue.h"
#define THREADS 4
#define TASKS_BATCH 40
/*!
* Task execution log.
*/
typedef struct task_log {
pthread_mutex_t mx;
unsigned executed;
} task_log_t;
/*!
* Get number of executed tasks and clear.
*/
static unsigned executed_reset(task_log_t *log)
{
pthread_mutex_lock(&log->mx);
unsigned result = log->executed;
log->executed = 0;
pthread_mutex_unlock(&log->mx);
return result;
}
/*!
* Simple task, just increases the counter in the log.
*/
static void task_counting(worker_task_t *task)
{
task_log_t *log = task->ctx;
pthread_mutex_lock(&log->mx);
log->executed += 1;
pthread_mutex_unlock(&log->mx);
}
static void interrupt_handle(int s)
{
}
int main(void)
{
plan_lazy();
struct sigaction sa;
sa.sa_handler = interrupt_handle;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
sigaction(SIGALRM, &sa, NULL); // Interrupt
// create pool
worker_pool_t *pool = worker_pool_create(THREADS);
ok(pool != NULL, "create worker pool");
if (!pool) {
return 1;
}
task_log_t log = {
.mx = PTHREAD_MUTEX_INITIALIZER,
};
// schedule jobs while pool is stopped
worker_task_t task = { .run = task_counting, .ctx = &log };
for (int i = 0; i < TASKS_BATCH; i++) {
worker_pool_assign(pool, &task);
}
sched_yield();
ok(executed_reset(&log) == 0, "executed count before start");
// start and wait for finish
worker_pool_start(pool);
worker_pool_wait(pool);
ok(executed_reset(&log) == TASKS_BATCH, "executed count after start");
// add additional jobs while pool is running
for (int i = 0; i < TASKS_BATCH; i++) {
worker_pool_assign(pool, &task);
}
worker_pool_wait(pool);
ok(executed_reset(&log) == TASKS_BATCH, "executed count after add");
// temporary suspension
worker_pool_suspend(pool);
for (int i = 0; i < TASKS_BATCH; i++) {
worker_pool_assign(pool, &task);
}
sched_yield();
ok(executed_reset(&log) == 0, "executed count after suspend");
worker_pool_resume(pool);
worker_pool_wait(pool);
ok(executed_reset(&log) == TASKS_BATCH, "executed count after resume");
// try clean
pthread_mutex_lock(&log.mx);
for (int i = 0; i < THREADS + TASKS_BATCH; i++) {
worker_pool_assign(pool, &task);
}
sched_yield();
worker_pool_clear(pool);
pthread_mutex_unlock(&log.mx);
worker_pool_wait(pool);
ok(executed_reset(&log) <= THREADS, "executed count after clear");
// cleanup
worker_pool_stop(pool);
worker_pool_join(pool);
worker_pool_destroy(pool);
pthread_mutex_destroy(&log.mx);
return 0;
}
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