Function force_memory_growth

test/embind/embind_test.cpp:225–252

}

void force_memory_growth() {
  std::size_t old_size = emscripten_get_heap_size();
  EM_ASM({"globalThis.oldheap = HEAP8;"});
  assert(val::global("oldheap")["byteLength"].as<size_t>() == old_size);
  emscripten_resize_heap(old_size + EMSCRIPTEN_PAGE_SIZE);
  assert(emscripten_get_heap_size() > old_size);
  // HEAP8 on the module should always be correct after the resize.
  // Our oldheap reference may be detached, depending on whether the
  // buffer is resizable.
  assert(val::module_property("HEAP8")["byteLength"].as<size_t>() > old_size);

  val oldheap = val::global("oldheap");
  val buffer = oldheap["buffer"];
  bool growable = false;
  if (!buffer.isUndefined()) {
    if (!buffer["resizable"].isUndefined()) {
      growable = buffer["resizable"].as<bool>();
    } else if (!buffer["growable"].isUndefined()) {
      growable = buffer["growable"].as<bool>();
    }
  }

  if (growable) {
    assert(oldheap["byteLength"].as<size_t>() == emscripten_get_heap_size());
  } else {
    assert(oldheap["byteLength"].as<size_t>() == 0);
  }
}

std::string emval_test_take_and_return_const_char_star(const char* str) {
  return str;