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
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
/***
This file is part of PulseAudio.
Copyright 2022 Craig Howard
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2.1 of the License,
or (at your option) any later version.
PulseAudio 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.
You should have received a copy of the GNU Lesser General Public License
along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "restart-module.h"
#include <pulse/timeval.h>
#include <pulse/xmalloc.h>
#include <pulse/mainloop.h>
#include <pulsecore/core.h>
#include <pulsecore/thread-mq.h>
struct pa_restart_data {
init_cb do_init;
done_cb do_done;
pa_usec_t restart_usec;
pa_module *module;
pa_time_event *time_event;
pa_defer_event *defer_event;
};
static void do_reinit(pa_mainloop_api *mainloop, pa_restart_data *rd);
static void call_init(pa_mainloop_api *mainloop, pa_time_event *e, const struct timeval *tv, void *userdata) {
pa_restart_data *rd = userdata;
int ret;
if (rd->time_event) {
mainloop->time_free(rd->time_event);
rd->time_event = NULL;
}
/* now that restart_usec has elapsed, we call do_init to restart the module */
ret = rd->do_init(rd->module);
/* if the init failed, we got here because the caller wanted to restart, so
* setup another restart */
if (ret < 0)
do_reinit(mainloop, rd);
}
static void defer_callback(pa_mainloop_api *mainloop, pa_defer_event *e, void *userdata) {
pa_restart_data *rd = userdata;
pa_assert(rd->defer_event == e);
mainloop->defer_enable(rd->defer_event, 0);
mainloop->defer_free(rd->defer_event);
rd->defer_event = NULL;
do_reinit(mainloop, rd);
}
static void do_reinit(pa_mainloop_api *mainloop, pa_restart_data *rd) {
struct timeval tv;
pa_assert_ctl_context();
/* call do_done on the module, which will effectively tear it down; all
* that remains is the pa_module */
rd->do_done(rd->module);
/* after restart_usec, call do_init to restart the module */
pa_gettimeofday(&tv);
pa_timeval_add(&tv, rd->restart_usec);
rd->time_event = mainloop->time_new(mainloop, &tv, call_init, rd);
}
pa_restart_data *pa_restart_module_reinit(pa_module *m, init_cb do_init, done_cb do_done, pa_usec_t restart_usec) {
pa_restart_data *rd;
pa_assert_ctl_context();
pa_assert(do_init);
pa_assert(do_done);
pa_assert(restart_usec);
pa_log_info("Starting reinit for %s", m->name);
rd = pa_xnew0(pa_restart_data, 1);
rd->do_init = do_init;
rd->do_done = do_done;
rd->restart_usec = restart_usec;
rd->module = m;
/* defer actually doing a reinit, so that we can safely exit whatever call
* chain we're in before we effectively reinit the module */
rd->defer_event = m->core->mainloop->defer_new(m->core->mainloop, defer_callback, rd);
m->core->mainloop->defer_enable(rd->defer_event, 1);
return rd;
}
void pa_restart_free(pa_restart_data *rd) {
pa_assert_ctl_context();
pa_assert(rd);
if (rd->defer_event) {
rd->module->core->mainloop->defer_enable(rd->defer_event, 0);
rd->module->core->mainloop->defer_free(rd->defer_event);
}
if (rd->time_event) {
pa_log_info("Cancel reinit for %s", rd->module->name);
rd->module->core->mainloop->time_free(rd->time_event);
}
pa_xfree(rd);
}
|
