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/*
* PASS (Power Aware System Service)
*
* Copyright (c) 2022 Samsung Electronics Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the License);
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <util/log.h>
#include <monitor/monitor.h>
#include <libsyscommon/resource-manager.h>
thread_local int empty_counter = 0;
static int monitor_func(void *data, void **result)
{
struct monitor *monitor = data;
struct monitor_command *cmd;
new_command:
if (dequeue(monitor->q, (void *)&cmd) < 0) {
if (empty_counter++ > MONITOR_POLLING_DURATION) {
empty_counter = 0;
mtx_lock(&monitor->lock);
cnd_wait(&monitor->signal, &monitor->lock);
mtx_unlock(&monitor->lock);
goto new_command;
}
return THREAD_RETURN_CONTINUE;
}
syscommon_resman_update_resource_attrs(cmd->resource_id);
cmd->done = true;
smp_wmb();
cnd_signal(&cmd->signal);
return THREAD_RETURN_CONTINUE;
}
int monitor_thread_init(struct monitor *monitor)
{
struct thread *thread;
struct queue *queue;
int ret;
ret = create_queue(&queue, free);
if (ret < 0) {
_E("failed to create command queue\n");
return ret;
}
/* q should be assigned before create daemon thread */
monitor->q = queue;
monitor->priv = NULL;
mtx_init(&monitor->lock, mtx_plain);
cnd_init(&monitor->signal);
ret = create_daemon_thread(&thread, monitor_func, monitor);
if (ret < 0) {
_E("failed to create monitor thread\n");
cnd_destroy(&monitor->signal);
mtx_destroy(&monitor->lock);
destroy_queue(queue);
monitor->q = NULL;
return ret;
}
monitor->thread = thread;
return 0;
}
void monitor_thread_exit(struct monitor *monitor)
{
if (monitor->thread) {
cnd_signal(&monitor->signal);
destroy_thread(monitor->thread);
monitor->thread = NULL;
}
cnd_destroy(&monitor->signal);
mtx_destroy(&monitor->lock);
if (monitor->q) {
destroy_queue(monitor->q);
monitor->q = NULL;
}
}
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