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#include <stdio.h>
#include <gc.h>
#include <assert.h>

void *global;

void finalizer(void *ptr, void *arg) {
  printf("finalizing %d (global == %d)\n", (int)arg, ptr == global);
}

void finalizer2(void *ptr, void *arg) {
  printf("finalizing2 %d (global == %d)\n", (int)arg, ptr == global);
}

int main() {
  GC_INIT();

  void *local, *local2, *local3, *local4, *local5, *local6;

  // Hold on to global, drop locals

  global = GC_MALLOC(1024);  // rooted since in a static allocation
  GC_REGISTER_FINALIZER_NO_ORDER(global, finalizer, 0, 0, 0);
  printf("alloc %p\n", global);

  local = GC_MALLOC(1024);  // not rooted since stack is not scanned
  GC_REGISTER_FINALIZER_NO_ORDER(local, finalizer, (void *)1, 0, 0);
  printf("alloc %p\n", local);

  assert((char *)local - (char *)global >= 1024 ||
         (char *)global - (char *)local >= 1024);

  local2 = GC_MALLOC(1024);  // no finalizer
  printf("alloc %p\n", local2);

  local3 = GC_MALLOC(1024);  // with finalizable2
  GC_REGISTER_FINALIZER_NO_ORDER(local3, finalizer2, (void *)2, 0, 0);
  printf("alloc %p\n", local);

  local4 = GC_MALLOC(1024);  // yet another
  GC_REGISTER_FINALIZER_NO_ORDER(local4, finalizer2, (void *)3, 0, 0);
  printf("alloc %p\n", local);

  printf("basic test\n");

  GC_FORCE_COLLECT();

  printf("*\n");

  GC_FREE(global);  // force free will actually work

  // scanning inside objects

  global = GC_MALLOC(12);
  GC_REGISTER_FINALIZER_NO_ORDER(global, finalizer, 0, 0, 0);
  local = GC_MALLOC(12);
  GC_REGISTER_FINALIZER_NO_ORDER(local, finalizer, (void *)1, 0, 0);
  local2 = GC_MALLOC_ATOMIC(12);
  GC_REGISTER_FINALIZER_NO_ORDER(local2, finalizer, (void *)2, 0, 0);
  local3 = GC_MALLOC(12);
  GC_REGISTER_FINALIZER_NO_ORDER(local3, finalizer, (void *)3, 0, 0);
  local4 = GC_MALLOC(12);
  GC_REGISTER_FINALIZER_NO_ORDER(local4, finalizer, (void *)4, 0, 0);
  local5 = GC_MALLOC_UNCOLLECTABLE(12);
  // This should never trigger since local5 is uncollectable
  GC_REGISTER_FINALIZER_NO_ORDER(local5, finalizer, (void *)5, 0, 0);

  printf("heap size = %d\n", GC_get_heap_size());

  local4 = GC_REALLOC(local4, 24);

  printf("heap size = %d\n", GC_get_heap_size());

  local6 = GC_MALLOC(12);
  GC_REGISTER_FINALIZER_NO_ORDER(local6, finalizer, (void *)6, 0, 0);
  // This should be the same as a free
  GC_REALLOC(local6, 0);

  void **globalData = (void **)global;
  globalData[0] = local;
  globalData[1] = local2;

  void **localData = (void **)local;
  localData[0] = local3;

  void **local2Data = (void **)local2;
  local2Data[0] =
      local4;  // actually ignored, because local2 is atomic, so 4 is freeable

  printf("object scan test test\n");

  GC_FORCE_COLLECT();

  printf("*\n");

  GC_FREE(global);  // force free will actually work

  printf("*\n");

  GC_FORCE_COLLECT();

  printf(".\n");

  global = 0;

  return 0;
}