#include <stdint.h>#include <stdio.h>#include <stdlib.h>#if _WIN32#include <windows.h>#else#include <pthread.h>#include <unistd.h>#endif#if _WIN32#define FFI_PLUGIN_EXPORT __declspec(dllexport)#else#define FFI_PLUGIN_EXPORT#endif// 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);// 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);
