Function mi_process_done

3rd/mimalloc-2.0.9/src/init.c:624–659

Called when the process is done (through `at_exit`)

// Called when the process is done (through `at_exit`)
static void mi_cdecl mi_process_done(void) {
  // only shutdown if we were initialized
  if (!_mi_process_is_initialized) return;
  // ensure we are called once
  static bool process_done = false;
  if (process_done) return;
  process_done = true;

  #if defined(_WIN32) && !defined(MI_SHARED_LIB)
  FlsFree(mi_fls_key);  // call thread-done on all threads (except the main thread) to prevent dangling callback pointer if statically linked with a DLL; Issue #208
  #endif

  #ifndef MI_SKIP_COLLECT_ON_EXIT
    #if (MI_DEBUG != 0) || !defined(MI_SHARED_LIB)
    // free all memory if possible on process exit. This is not needed for a stand-alone process
    // but should be done if mimalloc is statically linked into another shared library which
    // is repeatedly loaded/unloaded, see issue #281.
    mi_collect(true /* force */ );
    #endif
  #endif

  // Forcefully release all retained memory; this can be dangerous in general if overriding regular malloc/free
  // since after process_done there might still be other code running that calls `free` (like at_exit routines,
  // or C-runtime termination code.
  if (mi_option_is_enabled(mi_option_destroy_on_exit)) {
    _mi_heap_destroy_all();                          // forcefully release all memory held by all heaps (of this thread only!)
    _mi_segment_cache_free_all(&_mi_heap_main_get()->tld->os);  // release all cached segments
  }

  if (mi_option_is_enabled(mi_option_show_stats) || mi_option_is_enabled(mi_option_verbose)) {
    mi_stats_print(NULL);
  }
  mi_allocator_done();
  _mi_verbose_message("process done: 0x%zx\n", _mi_heap_main.thread_id);
  os_preloading = true; // don't call the C runtime anymore
}