2 Bacula(R) - The Network Backup Solution
4 Copyright (C) 2000-2017 Kern Sibbald
6 The original author of Bacula is Kern Sibbald, with contributions
7 from many others, a complete list can be found in the file AUTHORS.
9 You may use this file and others of this release according to the
10 license defined in the LICENSE file, which includes the Affero General
11 Public License, v3.0 ("AGPLv3") and some additional permissions and
12 terms pursuant to its AGPLv3 Section 7.
14 This notice must be preserved when any source code is
15 conveyed and/or propagated.
17 Bacula(R) is a registered trademark of Kern Sibbald.
20 * Bacula work queue routines. Permits passing work to
23 * Kern Sibbald, January MMI
25 * This code adapted from "Programming with POSIX Threads", by
33 * Structure to keep track of work queue request
35 typedef struct workq_ele_tag {
36 struct workq_ele_tag *next;
41 * Structure describing a work queue
43 typedef struct workq_tag {
44 pthread_mutex_t mutex; /* queue access control */
45 pthread_cond_t work; /* wait for work */
46 pthread_cond_t idle; /* wait for idle */
47 pthread_attr_t attr; /* create detached threads */
48 workq_ele_t *first, *last; /* work queue */
49 int valid; /* queue initialized */
50 int quit; /* workq should quit */
51 int max_workers; /* max threads */
52 int num_workers; /* current threads */
53 int idle_workers; /* idle threads */
54 int num_running; /* Number of jobs running */
55 void *(*engine)(void *arg); /* user engine */
58 #define WORKQ_VALID 0xdec1992
60 extern int workq_init(
62 int threads, /* maximum threads */
63 void *(*engine)(void *) /* engine routine */
65 extern int workq_destroy(workq_t *wq);
66 extern int workq_add(workq_t *wq, void *element, workq_ele_t **work_item, int priority);
67 extern int workq_remove(workq_t *wq, workq_ele_t *work_item);
68 extern int workq_wait_idle(workq_t *wq);
71 #endif /* __WORKQ_H */