projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| c6e3fd22 WH |
1 | #include <linux/kthread.h> |
| 2 | #include <linux/wait.h> | |
| 3 | ||
| 4 | #include "spk_types.h" | |
| 5 | #include "speakup.h" | |
| 6 | #include "spk_priv.h" | |
| 7 | ||
| 8 | DECLARE_WAIT_QUEUE_HEAD(speakup_event); | |
| 9 | EXPORT_SYMBOL_GPL(speakup_event); | |
| 10 | ||
| 11 | int speakup_thread(void *data) | |
| 12 | { | |
| 13 | unsigned long flags; | |
| 14 | int should_break; | |
| 15 | struct bleep our_sound; | |
| 16 | ||
| 17 | our_sound.active = 0; | |
| 18 | our_sound.freq = 0; | |
| 19 | our_sound.jiffies = 0; | |
| 20 | ||
| 21 | mutex_lock(&spk_mutex); | |
| 22 | while (1) { | |
| 23 | DEFINE_WAIT(wait); | |
| 472fe30e | 24 | |
| 7025005f | 25 | while (1) { |
| 939d84ee | 26 | spin_lock_irqsave(&speakup_info.spinlock, flags); |
| ca2beaf8 ST |
27 | our_sound = spk_unprocessed_sound; |
| 28 | spk_unprocessed_sound.active = 0; | |
| 7025005f WH |
29 | prepare_to_wait(&speakup_event, &wait, |
| 30 | TASK_INTERRUPTIBLE); | |
| c6e3fd22 WH |
31 | should_break = kthread_should_stop() || |
| 32 | our_sound.active || | |
| 33 | (synth && synth->catch_up && synth->alive && | |
| 34 | (speakup_info.flushing || | |
| 35 | !synth_buffer_empty())); | |
| 939d84ee | 36 | spin_unlock_irqrestore(&speakup_info.spinlock, flags); |
| c6e3fd22 WH |
37 | if (should_break) |
| 38 | break; | |
| 39 | mutex_unlock(&spk_mutex); | |
| 40 | schedule(); | |
| 41 | mutex_lock(&spk_mutex); | |
| 42 | } | |
| 43 | finish_wait(&speakup_event, &wait); | |
| 44 | if (kthread_should_stop()) | |
| 45 | break; | |
| 46 | ||
| 7025005f | 47 | if (our_sound.active) |
| c6e3fd22 | 48 | kd_mksound(our_sound.freq, our_sound.jiffies); |
| c6e3fd22 WH |
49 | if (synth && synth->catch_up && synth->alive) { |
| 50 | /* It is up to the callee to take the lock, so that it | |
| 13d825ed AF |
51 | * can sleep whenever it likes |
| 52 | */ | |
| c6e3fd22 WH |
53 | synth->catch_up(synth); |
| 54 | } | |
| 55 | ||
| 56 | speakup_start_ttys(); | |
| 57 | } | |
| 58 | mutex_unlock(&spk_mutex); | |
| 59 | return 0; | |
| 60 | } |