mongoose/src/timer.h

#pragma once

struct mg_timer {
  int period_ms;            // Timer period in milliseconds
  int flags;                // Possible flags values below
#define MG_TIMER_REPEAT 1   // Call function periodically, otherwise run once
#define MG_TIMER_RUN_NOW 2  // Call immediately when timer is set
  void (*fn)(void *);       // Function to call
  void *arg;                // Function agrument
  unsigned long expire;     // Expiration timestamp in milliseconds
  struct mg_timer *next;    // Linkage in g_timers list
};

extern struct mg_timer *g_timers;  // Global list of timers

void mg_timer_init(struct mg_timer *, int ms, int, void (*fn)(void *), void *);
void mg_timer_free(struct mg_timer *);
void mg_timer_poll(unsigned long uptime_ms);