audio/audio_pt_int.c

   1 /* public domain */
   2 #include "qemu-common.h"
   3 #include "audio.h"
   4
   5 #define AUDIO_CAP "audio-pt"
   6
   7 #include "audio_int.h"
   8 #include "audio_pt_int.h"
   9
  10 static void GCC_FMT_ATTR(3, 4) logerr (struct audio_pt *pt, int err,
  11                                        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 }