#include #define ATEXIT_MAX_FUNCS 128 struct atexit_func_entry_t { void (*func)(void*); void* arg; void* dso_handle; }; static atexit_func_entry_t s_atexit_funcs[ATEXIT_MAX_FUNCS]; static size_t s_atexit_func_count = 0; extern "C" int __cxa_atexit(void(*func)(void*), void* arg, void* dso_handle) { if (s_atexit_func_count >= ATEXIT_MAX_FUNCS) return -1; s_atexit_funcs[s_atexit_func_count++] = { .func = func, .arg = arg, .dso_handle = dso_handle, }; return 0; }; extern "C" void __cxa_finalize(void* dso_handle) { for (size_t i = s_atexit_func_count; i > 0; i--) { auto& atexit_func = s_atexit_funcs[i - 1]; if (atexit_func.func == nullptr) continue; if (dso_handle && dso_handle != atexit_func.dso_handle) continue; atexit_func.func(atexit_func.arg); atexit_func.func = nullptr; } };