perf tools: Use __maybe_used for unused variables
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / tools / perf / ui / helpline.c
1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <string.h>
4
5 #include "../debug.h"
6 #include "helpline.h"
7 #include "ui.h"
8
9 char ui_helpline__current[512];
10
11 static void nop_helpline__pop(void)
12 {
13 }
14
15 static void nop_helpline__push(const char *msg __maybe_unused)
16 {
17 }
18
19 static struct ui_helpline default_helpline_fns = {
20 .pop = nop_helpline__pop,
21 .push = nop_helpline__push,
22 };
23
24 struct ui_helpline *helpline_fns = &default_helpline_fns;
25
26 void ui_helpline__pop(void)
27 {
28 helpline_fns->pop();
29 }
30
31 void ui_helpline__push(const char *msg)
32 {
33 helpline_fns->push(msg);
34 }
35
36 void ui_helpline__vpush(const char *fmt, va_list ap)
37 {
38 char *s;
39
40 if (vasprintf(&s, fmt, ap) < 0)
41 vfprintf(stderr, fmt, ap);
42 else {
43 ui_helpline__push(s);
44 free(s);
45 }
46 }
47
48 void ui_helpline__fpush(const char *fmt, ...)
49 {
50 va_list ap;
51
52 va_start(ap, fmt);
53 ui_helpline__vpush(fmt, ap);
54 va_end(ap);
55 }
56
57 void ui_helpline__puts(const char *msg)
58 {
59 ui_helpline__pop();
60 ui_helpline__push(msg);
61 }