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workq.h
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workq.h
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/*
BAREOS® - Backup Archiving REcovery Open Sourced
Copyright (C) 2001-2009 Free Software Foundation Europe e.V.
Copyright (C) 2016-2016 Bareos GmbH & Co. KG
This program is Free Software; you can redistribute it and/or
modify it under the terms of version three of the GNU Affero General Public
License as published by the Free Software Foundation and included
in the file LICENSE.
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
Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
*/
/*
* Kern Sibbald, January MMI
*/
/**
* @file
* BAREOS work queue routines. Permits passing work to
* multiple threads.
*
* Kern Sibbald, January MMI
*
*/
#ifndef BAREOS_LIB_WORKQ_H_
#define BAREOS_LIB_WORKQ_H_ 1
/**
* Structure to keep track of work queue request
*/
typedef struct workq_ele_tag {
struct workq_ele_tag *next;
void *data;
} workq_ele_t;
/**
* Structure describing a work queue
*/
typedef struct workq_tag {
pthread_mutex_t mutex; /* queue access control */
pthread_cond_t work; /* wait for work */
pthread_attr_t attr; /* create detached threads */
workq_ele_t *first, *last; /* work queue */
int valid; /* queue initialized */
int quit; /* workq should quit */
int max_workers; /* max threads */
int num_workers; /* current threads */
void *(*engine)(void *arg); /* user engine */
} workq_t;
#define WORKQ_VALID 0xdec1992
extern int WorkqInit(
workq_t *wq,
int threads, /* maximum threads */
void *(*engine)(void *) /* engine routine */
);
extern int WorkqDestroy(workq_t *wq);
extern int WorkqAdd(workq_t *wq, void *element, workq_ele_t **work_item, int priority);
#endif /* BAREOS_LIB_WORKQ_H_ */