1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
/**
* @file scheduler.c
*
* @brief Implementation of scheduler_t.
*
*/
/*
* Copyright (C) 2005 Jan Hutter, Martin Willi
* Hochschule fuer Technik Rapperswil
*
* 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 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*/
#include <stdlib.h>
#include <pthread.h>
#include "scheduler.h"
#include <daemon.h>
#include <definitions.h>
#include <utils/logger_manager.h>
#include <queues/job_queue.h>
typedef struct private_scheduler_t private_scheduler_t;
/**
* Private data of a scheduler_t object.
*/
struct private_scheduler_t {
/**
* Public part of a scheduler_t object.
*/
scheduler_t public;
/**
* @brief Get events from the event queue and add them to to job queue.
*
* Thread function started at creation of the scheduler object.
*
* @param this calling object
*/
void (*get_events) (private_scheduler_t *this);
/**
* Assigned thread.
*/
pthread_t assigned_thread;
/**
* A logger.
*/
logger_t *logger;
};
/**
* Implementation of private_scheduler_t.get_events.
*/
static void get_events(private_scheduler_t * this)
{
job_t *current_job;
/* cancellation disabled by default */
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
this->logger->log(this->logger, CONTROL, "Scheduler thread running, thread_id %u", (int)pthread_self());
for (;;)
{
this->logger->log(this->logger, CONTROL|LEVEL2, "Waiting for next event...");
/* get a job, this block until one is available */
current_job = charon->event_queue->get(charon->event_queue);
/* queue the job in the job queue, workers will eat them */
charon->job_queue->add(charon->job_queue, current_job);
this->logger->log(this->logger, CONTROL | LEVEL1, "Got event, added job %s to job-queue.",
mapping_find(job_type_m, current_job->get_type(current_job)));
}
}
/**
* Implementation of scheduler_t.destroy.
*/
static void destroy(private_scheduler_t *this)
{
this->logger->log(this->logger, CONTROL | LEVEL1, "Going to terminate scheduler thread");
pthread_cancel(this->assigned_thread);
pthread_join(this->assigned_thread, NULL);
this->logger->log(this->logger, CONTROL | LEVEL1, "Scheduler thread terminated");
free(this);
}
/*
* Described in header.
*/
scheduler_t * scheduler_create()
{
private_scheduler_t *this = malloc_thing(private_scheduler_t);
this->public.destroy = (void(*)(scheduler_t*)) destroy;
this->get_events = get_events;
this->logger = logger_manager->get_logger(logger_manager, SCHEDULER);
if (pthread_create(&(this->assigned_thread), NULL, (void*(*)(void*))this->get_events, this) != 0)
{
/* thread could not be created */
this->logger->log(this->logger, ERROR, "Scheduler thread could not be created!");
free(this);
charon->kill(charon, "Unable to create scheduler thread");
}
return &(this->public);
}
|
