sound/core/seq/oss/seq_oss_readq.h

File Facts

System

Linux kernel

Corpus path

sound/core/seq/oss/seq_oss_readq.h

Extension

.h

Size

1554 bytes

Lines

47

Domain

Driver Families

Bucket

sound/core

Inferred role

Driver Families: implementation source

Status

source 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.

• 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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• seq_oss_device.h
• seq_oss_event.h

Detected Declarations

• struct seq_oss_readq

Annotated Snippet

struct seq_oss_readq {
	int qlen;
	int maxlen;
	int head, tail;
	unsigned long pre_event_timeout;
	unsigned long input_time;
	wait_queue_head_t midi_sleep;
	spinlock_t lock;
	union evrec q[] __counted_by(maxlen);
};

struct seq_oss_readq *snd_seq_oss_readq_new(struct seq_oss_devinfo *dp, int maxlen);
void snd_seq_oss_readq_delete(struct seq_oss_readq *q);
void snd_seq_oss_readq_clear(struct seq_oss_readq *readq);
unsigned int snd_seq_oss_readq_poll(struct seq_oss_readq *readq, struct file *file, poll_table *wait);
int snd_seq_oss_readq_puts(struct seq_oss_readq *readq, int dev, unsigned char *data, int len);
int snd_seq_oss_readq_sysex(struct seq_oss_readq *q, int dev,
			    struct snd_seq_event *ev);
int snd_seq_oss_readq_put_event(struct seq_oss_readq *readq, union evrec *ev);
int snd_seq_oss_readq_put_timestamp(struct seq_oss_readq *readq, unsigned long curt, int seq_mode);
int snd_seq_oss_readq_pick(struct seq_oss_readq *q, union evrec *rec);
void snd_seq_oss_readq_wait(struct seq_oss_readq *q);
void snd_seq_oss_readq_free(struct seq_oss_readq *q);

#define snd_seq_oss_readq_lock(q, flags) spin_lock_irqsave(&(q)->lock, flags)
#define snd_seq_oss_readq_unlock(q, flags) spin_unlock_irqrestore(&(q)->lock, flags)

#endif

Annotation

• Immediate include surface: `seq_oss_device.h`, `seq_oss_event.h`.
• Detected declarations: `struct seq_oss_readq`.
• Atlas domain: Driver Families / sound/core.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.