sound/core/seq/seq_clientmgr.c

Source file repositories/reference/linux-study-clean/sound/core/seq/seq_clientmgr.c

File Facts

System
Linux kernel
Corpus path
sound/core/seq/seq_clientmgr.c
Extension
.c
Size
72616 bytes
Lines
2717
Domain
Driver Families
Bucket
sound/core
Inferred role
Driver Families: operation-table or driver-model contract
Status
pattern implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

static const struct file_operations snd_seq_f_ops =
{
	.owner =	THIS_MODULE,
	.read =		snd_seq_read,
	.write =	snd_seq_write,
	.open =		snd_seq_open,
	.release =	snd_seq_release,
	.poll =		snd_seq_poll,
	.unlocked_ioctl =	snd_seq_ioctl,
	.compat_ioctl =	snd_seq_ioctl_compat,
};

static struct device *seq_dev;

/* 
 * register sequencer device 
 */
int __init snd_sequencer_device_init(void)
{
	int err;

	err = snd_device_alloc(&seq_dev, NULL);
	if (err < 0)
		return err;
	dev_set_name(seq_dev, "seq");

	scoped_guard(mutex, &register_mutex) {
		err = snd_register_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0,
					  &snd_seq_f_ops, NULL, seq_dev);
	}
	if (err < 0) {
		put_device(seq_dev);
		return err;
	}
	
	return 0;
}



/* 
 * unregister sequencer device 
 */
void snd_sequencer_device_done(void)
{
	snd_unregister_device(seq_dev);
	put_device(seq_dev);
}

Annotation

Implementation Notes