Function mi_process_init

3rd/mimalloc-2.0.9/src/init.c:580–621

Initialize the process; called by thread_init or the process loader

// Initialize the process; called by thread_init or the process loader
void mi_process_init(void) mi_attr_noexcept {
  // ensure we are called once
  if (_mi_process_is_initialized) return;
  _mi_verbose_message("process init: 0x%zx\n", _mi_thread_id());
  _mi_process_is_initialized = true;
  mi_process_setup_auto_thread_done();

  mi_detect_cpu_features();
  _mi_os_init();
  mi_heap_main_init();
  #if (MI_DEBUG)
  _mi_verbose_message("debug level : %d\n", MI_DEBUG);
  #endif
  _mi_verbose_message("secure level: %d\n", MI_SECURE);
  _mi_verbose_message("mem tracking: %s\n", MI_TRACK_TOOL);
  mi_thread_init();

  #if defined(_WIN32) && !defined(MI_SHARED_LIB)
  // When building as a static lib the FLS cleanup happens to early for the main thread.
  // To avoid this, set the FLS value for the main thread to NULL so the fls cleanup
  // will not call _mi_thread_done on the (still executing) main thread. See issue #508.
  FlsSetValue(mi_fls_key, NULL);
  #endif

  mi_stats_reset();  // only call stat reset *after* thread init (or the heap tld == NULL)

  if (mi_option_is_enabled(mi_option_reserve_huge_os_pages)) {
    size_t pages = mi_option_get_clamp(mi_option_reserve_huge_os_pages, 0, 128*1024);
    long reserve_at = mi_option_get(mi_option_reserve_huge_os_pages_at);
    if (reserve_at != -1) {
      mi_reserve_huge_os_pages_at(pages, reserve_at, pages*500);
    } else {
      mi_reserve_huge_os_pages_interleave(pages, 0, pages*500);
    }
  }
  if (mi_option_is_enabled(mi_option_reserve_os_memory)) {
    long ksize = mi_option_get(mi_option_reserve_os_memory);
    if (ksize > 0) {
      mi_reserve_os_memory((size_t)ksize*MI_KiB, true /* commit? */, true /* allow large pages? */);
    }
  }
}

// Called when the process is done (through `at_exit`)
static void mi_cdecl mi_process_done(void) {