Commit | Line | Data |
---|---|---|
1a8e7458 JA |
1 | /* |
2 | * Basic workqueue like code, that sets up a thread and allows async | |
3 | * processing of some sort. Could be extended to allow for multiple | |
4 | * worker threads. But right now fio associates one of this per IO | |
5 | * thread, so should be enough to have just a single thread doing the | |
6 | * work. | |
7 | */ | |
aee2ab67 JA |
8 | #include <stdio.h> |
9 | #include <stdlib.h> | |
10 | #include <stdarg.h> | |
11 | #include <unistd.h> | |
12 | #include <errno.h> | |
13 | #include <pthread.h> | |
14 | ||
78d55e72 JA |
15 | #include "../smalloc.h" |
16 | #include "../log.h" | |
aee2ab67 JA |
17 | #include "tp.h" |
18 | ||
19 | static void tp_flush_work(struct flist_head *list) | |
20 | { | |
21 | struct tp_work *work; | |
22 | ||
23 | while (!flist_empty(list)) { | |
24 | work = flist_entry(list->next, struct tp_work, list); | |
25 | flist_del(&work->list); | |
26 | work->fn(work); | |
27 | } | |
28 | } | |
29 | ||
30 | static void *tp_thread(void *data) | |
31 | { | |
32 | struct tp_data *tdat = data; | |
33 | struct flist_head work_list; | |
34 | ||
35 | INIT_FLIST_HEAD(&work_list); | |
36 | ||
aee2ab67 JA |
37 | while (1) { |
38 | pthread_mutex_lock(&tdat->lock); | |
39 | ||
40 | if (!tdat->thread_exit && flist_empty(&tdat->work)) | |
41 | pthread_cond_wait(&tdat->cv, &tdat->lock); | |
42 | ||
9342d5f8 JA |
43 | if (!flist_empty(&tdat->work)) |
44 | flist_splice_tail_init(&tdat->work, &work_list); | |
aee2ab67 JA |
45 | |
46 | pthread_mutex_unlock(&tdat->lock); | |
47 | ||
48 | if (flist_empty(&work_list)) { | |
49 | if (tdat->thread_exit) | |
50 | break; | |
51 | continue; | |
52 | } | |
53 | ||
54 | tp_flush_work(&work_list); | |
55 | } | |
56 | ||
aee2ab67 JA |
57 | return NULL; |
58 | } | |
59 | ||
60 | void tp_queue_work(struct tp_data *tdat, struct tp_work *work) | |
61 | { | |
62 | work->done = 0; | |
63 | ||
64 | pthread_mutex_lock(&tdat->lock); | |
65 | flist_add_tail(&work->list, &tdat->work); | |
66 | pthread_cond_signal(&tdat->cv); | |
67 | pthread_mutex_unlock(&tdat->lock); | |
68 | } | |
69 | ||
70 | void tp_init(struct tp_data **tdatp) | |
71 | { | |
72 | struct tp_data *tdat; | |
73 | int ret; | |
74 | ||
75 | if (*tdatp) | |
76 | return; | |
77 | ||
78 | *tdatp = tdat = smalloc(sizeof(*tdat)); | |
79 | pthread_mutex_init(&tdat->lock, NULL); | |
80 | INIT_FLIST_HEAD(&tdat->work); | |
81 | pthread_cond_init(&tdat->cv, NULL); | |
82 | pthread_cond_init(&tdat->sleep_cv, NULL); | |
83 | ||
84 | ret = pthread_create(&tdat->thread, NULL, tp_thread, tdat); | |
85 | if (ret) | |
86 | log_err("fio: failed to create tp thread\n"); | |
87 | } | |
88 | ||
89 | void tp_exit(struct tp_data **tdatp) | |
90 | { | |
91 | struct tp_data *tdat = *tdatp; | |
92 | void *ret; | |
93 | ||
94 | if (!tdat) | |
95 | return; | |
96 | ||
97 | tdat->thread_exit = 1; | |
98 | pthread_mutex_lock(&tdat->lock); | |
99 | pthread_cond_signal(&tdat->cv); | |
100 | pthread_mutex_unlock(&tdat->lock); | |
101 | ||
102 | pthread_join(tdat->thread, &ret); | |
103 | ||
104 | sfree(tdat); | |
105 | *tdatp = NULL; | |
106 | } |