Implementing periodic events in C (Windows)

periodic_events.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <Windows.h>

typedef struct {
    void (*handler)(char *);
    char parameter[128];
    int interval, last_emitted;
} Event;

Event events[128];
int event_count;

void add_event(void (*handler)(char *), char parameter[], int interval) {
    events[event_count].handler = handler;
    strcpy(events[event_count].parameter, parameter);
    events[event_count].interval = interval;
    events[event_count].last_emitted = 0;
    ++event_count;
}
void run() {
    int now = GetTickCount();

    for (int i = 0; i < event_count; ++i) {
        events[i].last_emitted = now;
    }

    while (1) {
        now = GetTickCount();
        
        for (int i = 0; i < event_count; ++i) {
            if (now - events[i].last_emitted >= events[i].interval) {
                events[i].handler(events[i].parameter);
                events[i].last_emitted = now;
            }
        }

        Sleep(10);
    }
}

void say(char *message) {
    printf("Message: %s\n", message);
}

int main() {
    add_event(say, "Hello", 1000);
    add_event(say, "Goodbye", 1500);

    run();
    
    return 0;
}