tools/perf/ui/helpline.h

File Facts

System

Linux kernel

Corpus path

tools/perf/ui/helpline.h

Extension

.h

Size

760 bytes

Lines

30

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

• stdio.h
• stdarg.h

Detected Declarations

• struct ui_helpline

Annotated Snippet

struct ui_helpline {
	void (*pop)(void);
	void (*push)(const char *msg);
	int  (*show)(const char *fmt, va_list ap);
};

extern struct ui_helpline *helpline_fns;

void ui_helpline__init(void);

void ui_helpline__pop(void);
void ui_helpline__push(const char *msg);
void ui_helpline__vpush(const char *fmt, va_list ap);
void ui_helpline__fpush(const char *fmt, ...);
void ui_helpline__puts(const char *msg);
void ui_helpline__printf(const char *fmt, ...);
int  ui_helpline__vshow(const char *fmt, va_list ap);

extern char ui_helpline__current[512];
extern char ui_helpline__last_msg[];

#endif /* _PERF_UI_HELPLINE_H_ */

Annotation

• Immediate include surface: `stdio.h`, `stdarg.h`.
• Detected declarations: `struct ui_helpline`.
• 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.