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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
3911fb64 RD |
2 | /* |
3 | * win_minmax.h: windowed min/max tracker by Kathleen Nichols. | |
a4f1f9ac NC |
4 | * |
5 | */ | |
6 | #ifndef MINMAX_H | |
7 | #define MINMAX_H | |
8 | ||
9 | #include <linux/types.h> | |
10 | ||
11 | /* A single data point for our parameterized min-max tracker */ | |
12 | struct minmax_sample { | |
13 | u32 t; /* time measurement was taken */ | |
14 | u32 v; /* value measured */ | |
15 | }; | |
16 | ||
17 | /* State for the parameterized min-max tracker */ | |
18 | struct minmax { | |
19 | struct minmax_sample s[3]; | |
20 | }; | |
21 | ||
22 | static inline u32 minmax_get(const struct minmax *m) | |
23 | { | |
24 | return m->s[0].v; | |
25 | } | |
26 | ||
27 | static inline u32 minmax_reset(struct minmax *m, u32 t, u32 meas) | |
28 | { | |
29 | struct minmax_sample val = { .t = t, .v = meas }; | |
30 | ||
31 | m->s[2] = m->s[1] = m->s[0] = val; | |
32 | return m->s[0].v; | |
33 | } | |
34 | ||
35 | u32 minmax_running_max(struct minmax *m, u32 win, u32 t, u32 meas); | |
36 | u32 minmax_running_min(struct minmax *m, u32 win, u32 t, u32 meas); | |
37 | ||
38 | #endif |