tools/perf/util/evswitch.c

File Facts

System

Linux kernel

Corpus path

tools/perf/util/evswitch.c

Extension

.c

Size

1485 bytes

Lines

63

Domain

Support Tooling And Documentation

Bucket

tools

Inferred role

Support Tooling And Documentation: implementation source

Status

source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

• Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• errno.h
• evswitch.h
• evlist.h

Detected Declarations

• function evswitch__discard
• function evswitch__fprintf_enoent
• function evswitch__init

Annotated Snippet

if (evswitch->on == NULL) {
			evswitch__fprintf_enoent(fp, "on", evswitch->on_name);
			return -ENOENT;
		}
		evswitch->discarding = true;
	}

	if (evswitch->off_name) {
		evswitch->off = evlist__find_evsel_by_str(evlist, evswitch->off_name);
		if (evswitch->off == NULL) {
			evswitch__fprintf_enoent(fp, "off", evswitch->off_name);
			return -ENOENT;
		}
	}

	return 0;
}

Annotation

• Immediate include surface: `errno.h`, `evswitch.h`, `evlist.h`.
• Detected declarations: `function evswitch__discard`, `function evswitch__fprintf_enoent`, `function evswitch__init`.
• Atlas domain: Support Tooling And Documentation / tools.
• 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.