130 lines
2.9 KiB
C
130 lines
2.9 KiB
C
|
/**
|
||
|
|
* @file worker.c
|
||
|
|
*
|
||
|
|
* @brief worker thread, gets jobs form job_queue
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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 "thread_pool.h"
|
||
|
|
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <freeswan.h>
|
||
|
|
#include <pluto/constants.h>
|
||
|
|
#include <pluto/defs.h>
|
||
|
|
|
||
|
|
#include <pthread.h>
|
||
|
|
|
||
|
|
/**
|
||
|
|
* structure with private members for thread_pool
|
||
|
|
*/
|
||
|
|
typedef struct {
|
||
|
|
/**
|
||
|
|
* inclusion of public members
|
||
|
|
*/
|
||
|
|
thread_pool_t public;
|
||
|
|
/**
|
||
|
|
* number of running threads
|
||
|
|
*/
|
||
|
|
size_t pool_size;
|
||
|
|
/**
|
||
|
|
* array of thread ids
|
||
|
|
*/
|
||
|
|
pthread_t *threads;
|
||
|
|
} private_thread_pool_t;
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
void *job_processing(private_thread_pool_t *this)
|
||
|
|
{
|
||
|
|
for (;;) {
|
||
|
|
|
||
|
|
sleep(1);
|
||
|
|
|
||
|
|
/* flag for termination received ? */
|
||
|
|
pthread_testcancel();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Implementation of thread_pool_t.get_pool_size
|
||
|
|
*/
|
||
|
|
static status_t get_pool_size(private_thread_pool_t *this, size_t *size)
|
||
|
|
{
|
||
|
|
*size = this->pool_size;
|
||
|
|
return SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Implementation of thread_pool_t.destroy
|
||
|
|
*/
|
||
|
|
static status_t destroy(private_thread_pool_t *this)
|
||
|
|
{
|
||
|
|
int current;
|
||
|
|
|
||
|
|
/* flag thread for termination */
|
||
|
|
for (current = 0; current < this->pool_size; current++) {
|
||
|
|
pthread_cancel(this->threads[current]);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* wait for all threads */
|
||
|
|
for (current = 0; current < this->pool_size; current++) {
|
||
|
|
pthread_join(this->threads[current], NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* free mem */
|
||
|
|
pfree(this->threads);
|
||
|
|
pfree(this);
|
||
|
|
return SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Implementation of default constructor for thread_pool_t
|
||
|
|
*/
|
||
|
|
thread_pool_t *thread_pool_create(size_t pool_size)
|
||
|
|
{
|
||
|
|
int current;
|
||
|
|
|
||
|
|
private_thread_pool_t *this = alloc_thing(private_thread_pool_t, "private_thread_pool_t");
|
||
|
|
|
||
|
|
/* fill in public fields */
|
||
|
|
this->public.destroy = (status_t(*)(thread_pool_t*))destroy;
|
||
|
|
this->public.get_pool_size = (status_t(*)(thread_pool_t*, size_t*))get_pool_size;
|
||
|
|
|
||
|
|
this->pool_size = pool_size;
|
||
|
|
this->threads = alloc_bytes(sizeof(pthread_t) * pool_size, "pthread_t[] of private_thread_pool_t");
|
||
|
|
|
||
|
|
/* try to create as many threads as possible, up tu pool_size */
|
||
|
|
for (current = 0; current < pool_size; current++) {
|
||
|
|
if (pthread_create(&(this->threads[current]), NULL, (void*(*)(void*))job_processing, this)) {
|
||
|
|
/* did we get any? */
|
||
|
|
if (current == 0) {
|
||
|
|
pfree(this->threads);
|
||
|
|
pfree(this);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
/* not all threads could be created, but at least one :-/ */
|
||
|
|
this->pool_size = current;
|
||
|
|
return (thread_pool_t*)this;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return (thread_pool_t*)this;
|
||
|
|
}
|