sound/core/pcm_local.h

File Facts

System

Linux kernel

Corpus path

sound/core/pcm_local.h

Extension

.h

Size

3050 bytes

Lines

84

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• No C-style include directives detected by the generator.

Detected Declarations

• function snd_pcm_avail
• function snd_pcm_hw_avail
• function snd_pcm_timer_resolution_change
• function snd_pcm_dma_buffer_sync

Annotated Snippet

static inline void snd_pcm_timer_init(struct snd_pcm_substream *substream) {}
static inline void snd_pcm_timer_done(struct snd_pcm_substream *substream) {}
#endif

void __snd_pcm_xrun(struct snd_pcm_substream *substream);
void snd_pcm_group_init(struct snd_pcm_group *group);
void snd_pcm_sync_stop(struct snd_pcm_substream *substream, bool sync_irq);

#define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)

/* loop over all PCM substreams */
#define for_each_pcm_substream(pcm, str, subs) \
	for ((str) = 0; (str) < 2; (str)++) \
		for ((subs) = (pcm)->streams[str].substream; (subs); \
		     (subs) = (subs)->next)

static inline void snd_pcm_dma_buffer_sync(struct snd_pcm_substream *substream,
					   enum snd_dma_sync_mode mode)
{
	if (substream->runtime->info & SNDRV_PCM_INFO_EXPLICIT_SYNC)
		snd_dma_buffer_sync(snd_pcm_get_dma_buf(substream), mode);
}

#endif	/* __SOUND_CORE_PCM_LOCAL_H */

Annotation

• Detected declarations: `function snd_pcm_avail`, `function snd_pcm_hw_avail`, `function snd_pcm_timer_resolution_change`, `function snd_pcm_dma_buffer_sync`.
• Atlas domain: Driver Families / sound/core.
• Implementation status: source implementation candidate.

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.