root / audio / audio_pt_int.c @ cf2c1839
History | View | Annotate | Download (3.8 kB)
1 |
#include "qemu-common.h" |
---|---|
2 |
#include "audio.h" |
3 |
|
4 |
#define AUDIO_CAP "audio-pt" |
5 |
|
6 |
#include "audio_int.h" |
7 |
#include "audio_pt_int.h" |
8 |
|
9 |
#include <signal.h> |
10 |
|
11 |
static void logerr (struct audio_pt *pt, int err, const char *fmt, ...) |
12 |
{ |
13 |
va_list ap; |
14 |
|
15 |
va_start (ap, fmt); |
16 |
AUD_vlog (pt->drv, fmt, ap); |
17 |
va_end (ap); |
18 |
|
19 |
AUD_log (NULL, "\n"); |
20 |
AUD_log (pt->drv, "Reason: %s\n", strerror (err));
|
21 |
} |
22 |
|
23 |
int audio_pt_init (struct audio_pt *p, void *(*func) (void *), |
24 |
void *opaque, const char *drv, const char *cap) |
25 |
{ |
26 |
int err, err2;
|
27 |
const char *efunc; |
28 |
sigset_t set, old_set; |
29 |
|
30 |
p->drv = drv; |
31 |
|
32 |
err = sigfillset (&set); |
33 |
if (err) {
|
34 |
logerr (p, errno, "%s(%s): sigfillset failed", cap, AUDIO_FUNC);
|
35 |
return -1; |
36 |
} |
37 |
|
38 |
err = pthread_mutex_init (&p->mutex, NULL);
|
39 |
if (err) {
|
40 |
efunc = "pthread_mutex_init";
|
41 |
goto err0;
|
42 |
} |
43 |
|
44 |
err = pthread_cond_init (&p->cond, NULL);
|
45 |
if (err) {
|
46 |
efunc = "pthread_cond_init";
|
47 |
goto err1;
|
48 |
} |
49 |
|
50 |
err = pthread_sigmask (SIG_BLOCK, &set, &old_set); |
51 |
if (err) {
|
52 |
efunc = "pthread_sigmask";
|
53 |
goto err2;
|
54 |
} |
55 |
|
56 |
err = pthread_create (&p->thread, NULL, func, opaque);
|
57 |
|
58 |
err2 = pthread_sigmask (SIG_SETMASK, &old_set, NULL);
|
59 |
if (err2) {
|
60 |
logerr (p, err2, "%s(%s): pthread_sigmask (restore) failed",
|
61 |
cap, AUDIO_FUNC); |
62 |
/* We have failed to restore original signal mask, all bets are off,
|
63 |
so terminate the process */
|
64 |
exit (EXIT_FAILURE); |
65 |
} |
66 |
|
67 |
if (err) {
|
68 |
efunc = "pthread_create";
|
69 |
goto err2;
|
70 |
} |
71 |
|
72 |
return 0; |
73 |
|
74 |
err2:
|
75 |
err2 = pthread_cond_destroy (&p->cond); |
76 |
if (err2) {
|
77 |
logerr (p, err2, "%s(%s): pthread_cond_destroy failed", cap, AUDIO_FUNC);
|
78 |
} |
79 |
|
80 |
err1:
|
81 |
err2 = pthread_mutex_destroy (&p->mutex); |
82 |
if (err2) {
|
83 |
logerr (p, err2, "%s(%s): pthread_mutex_destroy failed", cap, AUDIO_FUNC);
|
84 |
} |
85 |
|
86 |
err0:
|
87 |
logerr (p, err, "%s(%s): %s failed", cap, AUDIO_FUNC, efunc);
|
88 |
return -1; |
89 |
} |
90 |
|
91 |
int audio_pt_fini (struct audio_pt *p, const char *cap) |
92 |
{ |
93 |
int err, ret = 0; |
94 |
|
95 |
err = pthread_cond_destroy (&p->cond); |
96 |
if (err) {
|
97 |
logerr (p, err, "%s(%s): pthread_cond_destroy failed", cap, AUDIO_FUNC);
|
98 |
ret = -1;
|
99 |
} |
100 |
|
101 |
err = pthread_mutex_destroy (&p->mutex); |
102 |
if (err) {
|
103 |
logerr (p, err, "%s(%s): pthread_mutex_destroy failed", cap, AUDIO_FUNC);
|
104 |
ret = -1;
|
105 |
} |
106 |
return ret;
|
107 |
} |
108 |
|
109 |
int audio_pt_lock (struct audio_pt *p, const char *cap) |
110 |
{ |
111 |
int err;
|
112 |
|
113 |
err = pthread_mutex_lock (&p->mutex); |
114 |
if (err) {
|
115 |
logerr (p, err, "%s(%s): pthread_mutex_lock failed", cap, AUDIO_FUNC);
|
116 |
return -1; |
117 |
} |
118 |
return 0; |
119 |
} |
120 |
|
121 |
int audio_pt_unlock (struct audio_pt *p, const char *cap) |
122 |
{ |
123 |
int err;
|
124 |
|
125 |
err = pthread_mutex_unlock (&p->mutex); |
126 |
if (err) {
|
127 |
logerr (p, err, "%s(%s): pthread_mutex_unlock failed", cap, AUDIO_FUNC);
|
128 |
return -1; |
129 |
} |
130 |
return 0; |
131 |
} |
132 |
|
133 |
int audio_pt_wait (struct audio_pt *p, const char *cap) |
134 |
{ |
135 |
int err;
|
136 |
|
137 |
err = pthread_cond_wait (&p->cond, &p->mutex); |
138 |
if (err) {
|
139 |
logerr (p, err, "%s(%s): pthread_cond_wait failed", cap, AUDIO_FUNC);
|
140 |
return -1; |
141 |
} |
142 |
return 0; |
143 |
} |
144 |
|
145 |
int audio_pt_unlock_and_signal (struct audio_pt *p, const char *cap) |
146 |
{ |
147 |
int err;
|
148 |
|
149 |
err = pthread_mutex_unlock (&p->mutex); |
150 |
if (err) {
|
151 |
logerr (p, err, "%s(%s): pthread_mutex_unlock failed", cap, AUDIO_FUNC);
|
152 |
return -1; |
153 |
} |
154 |
err = pthread_cond_signal (&p->cond); |
155 |
if (err) {
|
156 |
logerr (p, err, "%s(%s): pthread_cond_signal failed", cap, AUDIO_FUNC);
|
157 |
return -1; |
158 |
} |
159 |
return 0; |
160 |
} |
161 |
|
162 |
int audio_pt_join (struct audio_pt *p, void **arg, const char *cap) |
163 |
{ |
164 |
int err;
|
165 |
void *ret;
|
166 |
|
167 |
err = pthread_join (p->thread, &ret); |
168 |
if (err) {
|
169 |
logerr (p, err, "%s(%s): pthread_join failed", cap, AUDIO_FUNC);
|
170 |
return -1; |
171 |
} |
172 |
*arg = ret; |
173 |
return 0; |
174 |
} |