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
|
/*
* Copyright 2015 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Ben Skeggs <bskeggs@redhat.com>
*/
#include "priv.h"
struct nvos_work {
pthread_mutex_t mutex;
pthread_cond_t cond;
pthread_t thread;
bool done;
void (*func)(void *);
void *priv;
};
static void *
nvos_work(void *data)
{
struct nvos_work *work = data;
do {
pthread_mutex_lock(&work->mutex);
while (!work->priv && !work->done)
pthread_cond_wait(&work->cond, &work->mutex);
if (work->priv) {
work->func(work->priv);
work->priv = NULL;
}
pthread_mutex_unlock(&work->mutex);
} while (!work->done);
return NULL;
}
void
nvos_work_fini(struct nvos_work **pwork)
{
struct nvos_work *work = *pwork;
if (work) {
pthread_mutex_lock(&work->mutex);
work->done = true;
pthread_cond_signal(&work->cond);
pthread_mutex_unlock(&work->mutex);
pthread_join(work->thread, NULL);
pthread_cond_destroy(&work->cond);
pthread_mutex_destroy(&work->mutex);
free(*pwork);
*pwork = NULL;
}
}
bool
nvos_work_init(void (*func)(void *), void *priv, struct nvos_work **pwork)
{
struct nvos_work *work = *pwork;
if (unlikely(work == NULL)) {
if (!(work = calloc(1, sizeof(*work))))
return false;
work->func = func;
work->priv = NULL;
work->done = false;
if (pthread_mutex_init(&work->mutex, NULL))
goto fail_mutex;
if (pthread_cond_init(&work->cond, NULL))
goto fail_cond;
if (pthread_create(&work->thread, NULL, nvos_work, work))
goto fail_thread;
*pwork = work;
}
pthread_mutex_lock(&work->mutex);
work->priv = priv;
pthread_cond_signal(&work->cond);
pthread_mutex_unlock(&work->mutex);
return true;
fail_thread:
pthread_cond_destroy(&work->cond);
fail_cond:
pthread_mutex_destroy(&work->mutex);
fail_mutex:
free(work);
return false;
}
|
