os.h

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#ifndef _OS_H_
#define _OS_H_

#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <tick.h>

typedef int64_t os_time_t;

#ifndef TICK_FREQ
#error "TICK_FREQ has not been defined for the current MCU !"
#elif ((TICK_FREQ % 64) != 0)
#error "TICK_FREQ must be a multiple of 64 !"
#elif (TICK_FREQ < 8192)
#error "TICK_FREQ too low (should be >= 8192) !"
#endif

#define s2ostime(s)     ((os_time_t) ((int64_t) s * TICK_FREQ))
#define ms2ostime(ms)       ((os_time_t) (((int64_t) ms * TICK_FREQ) / 1000))
#define us2ostime(us)       ((os_time_t) (((int64_t) us * (TICK_FREQ / 64)) / 15625))

#define ostime2s(t)     ((int64_t) (t / TICK_FREQ))
#define ostime2ms(t)        ((int64_t) ((t * (int64_t) 1000) / TICK_FREQ))
#define ostime2us(t)        ((int64_t) ((t * (int64_t) 15625) / (TICK_FREQ / 64)))

struct os_job {
    void (*callback)(struct os_job *);
    os_time_t time;
    struct os_job *next;
};

typedef struct os_job os_job_t;


void os_init(void);

os_time_t os_get_time(void);

void os_wait_until(os_time_t time);

void os_delay(os_time_t time);

os_time_t os_get_elapsed_time(os_time_t time);

uint8_t os_cancel_job(os_job_t *job);

void os_post_job(os_job_t *job, void (*cb)(os_job_t *));

void os_post_delayed_job(os_job_t *job, os_time_t time, void (*cb)(os_job_t *));

void os_unblock_powersave(void);

void os_block_powersave(void);

void os_mainloop(void);

#endif /* _OS_H_ */