126 lines
3.4 KiB
C
126 lines
3.4 KiB
C
/**
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* @file scheduler.c
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*
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* @brief Implementation of scheduler_t.
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*
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*/
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/*
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* Copyright (C) 2005 Jan Hutter, Martin Willi
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include <stdlib.h>
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#include <pthread.h>
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#include "scheduler.h"
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#include <daemon.h>
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#include <definitions.h>
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#include <utils/allocator.h>
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#include <utils/logger_manager.h>
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#include <queues/job_queue.h>
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/**
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* Private data of a scheduler object
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*/
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typedef struct private_scheduler_t private_scheduler_t;
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struct private_scheduler_t {
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/**
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* Public part of a scheduler object
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*/
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scheduler_t public;
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/**
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* @brief Get events from the event queue and add them to to job queue.
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*
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* Thread function started at creation of the scheduler object.
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*
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* @param this assigned scheduler object
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*/
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void (*get_events) (private_scheduler_t *this);
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/**
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* Assigned thread to the scheduler_t object
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*/
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pthread_t assigned_thread;
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/**
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* logger for this scheduler
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*/
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logger_t *logger;
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};
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/**
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* implements private_scheduler_t.get_events
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*/
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static void get_events(private_scheduler_t * this)
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{
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job_t *current_job;
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/* cancellation disabled by default */
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pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
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this->logger->log(this->logger, CONTROL, "scheduler thread running, thread_id %u", (int)pthread_self());
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for (;;)
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{
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this->logger->log(this->logger, CONTROL|MORE, "waiting for next event...");
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/* get a job, this block until one is available */
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current_job = charon->event_queue->get(charon->event_queue);
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/* queue the job in the job queue, workers will eat them */
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charon->job_queue->add(charon->job_queue, current_job);
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this->logger->log(this->logger, CONTROL, "got event, added job %s to job-queue.",
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mapping_find(job_type_m, current_job->get_type(current_job)));
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}
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}
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/**
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* Implementation of scheduler_t's destroy function
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*/
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static void destroy(private_scheduler_t *this)
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{
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this->logger->log(this->logger, CONTROL | MORE, "Going to terminate scheduler thread");
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pthread_cancel(this->assigned_thread);
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pthread_join(this->assigned_thread, NULL);
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this->logger->log(this->logger, CONTROL | MORE, "Scheduler thread terminated");
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charon->logger_manager->destroy_logger(charon->logger_manager, this->logger);
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allocator_free(this);
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}
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scheduler_t * scheduler_create()
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{
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private_scheduler_t *this = allocator_alloc_thing(private_scheduler_t);
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this->public.destroy = (void(*)(scheduler_t*)) destroy;
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this->get_events = get_events;
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this->logger = charon->logger_manager->create_logger(charon->logger_manager, SCHEDULER, NULL);
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if (pthread_create(&(this->assigned_thread), NULL, (void*(*)(void*))this->get_events, this) != 0)
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{
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/* thread could not be created */
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this->logger->log(this->logger, ERROR, "Scheduler thread could not be created!");
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charon->logger_manager->destroy_logger(charon->logger_manager, this->logger);
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allocator_free(this);
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return NULL;
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}
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return &(this->public);
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}
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