#include "serious_python.h"

// A very short-lived native function.
//
// For very short-lived functions, it is fine to call them on the main isolate.
// They will block the Dart execution while running the native function, so
// only do this for native functions which are guaranteed to be short-lived.
FFI_PLUGIN_EXPORT intptr_t sum(intptr_t a, intptr_t b) { return a + b; }

// A longer-lived native function, which occupies the thread calling it.
//
// Do not call these kind of native functions in the main isolate. They will
// block Dart execution. This will cause dropped frames in Flutter applications.
// Instead, call these native functions on a separate isolate.
FFI_PLUGIN_EXPORT intptr_t sum_long_running(intptr_t a, intptr_t b) {
  // Simulate work.
#if _WIN32
  Sleep(5000);
#else
  usleep(5000 * 1000);
#endif
  return a + b;
}
