#include "sys_arch.h"

#include "ch32fun.h"
#include "lwip/sys.h"
#include "systick.h"

static unsigned long next = 1;

int rand(void) {
  next = next * 1103515245 + 12345;
  return (unsigned int)(next / 65536) % 32768;
}

void srand(unsigned int seed) { next = seed; }

uint32_t sys_now(void) { return millis(); }

sys_prot_t sys_arch_protect(void) {
  __disable_irq();
  return 1;
}

void sys_arch_unprotect(sys_prot_t pval) {
  (void)pval;
  __enable_irq();
}