thread_state_stats.h

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/*
 * Copyright (C) 2026 Kamil Lulko <kamil.lulko@gmail.com>
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 * This file is part of oveRTOS.
 */
 
#ifndef OVE_THREAD_STATE_STATS_H
#define OVE_THREAD_STATE_STATS_H
 
#include <stdint.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#ifdef CONFIG_OVE_THREAD_STATE_STATS
 
#define OVE_STATE_COUNT 5
 
struct ove_state_tracker {
    uint64_t cumul_us[OVE_STATE_COUNT]; 
    uint64_t last_ts_us;            
    int cur_state;              
};
 
uint64_t ove_state_stats_now_us(void);
 
static inline void ove_state_track_init(struct ove_state_tracker *st, int initial_state)
{
    for (int i = 0; i < OVE_STATE_COUNT; i++)
        st->cumul_us[i] = 0;
    st->last_ts_us = ove_state_stats_now_us();
    st->cur_state = initial_state;
}
 
static inline void ove_state_track_transition(struct ove_state_tracker *st, int new_state)
{
    uint64_t now = ove_state_stats_now_us();
    int idx = st->cur_state;
    if (idx >= 0 && idx < OVE_STATE_COUNT)
        st->cumul_us[idx] += now - st->last_ts_us;
    st->last_ts_us = now;
    st->cur_state = new_state;
}
 
#else /* !CONFIG_OVE_THREAD_STATE_STATS */
 
struct ove_state_tracker {
    char _dummy;
};
#define ove_state_track_init(st, s) ((void)0)
#define ove_state_track_transition(st, s) ((void)0)
 
#endif /* CONFIG_OVE_THREAD_STATE_STATS */
 
#ifdef __cplusplus
}
#endif
 
#endif /* OVE_THREAD_STATE_STATS_H */