src/lib/evloop/evloop_sys.c

   1 /* Copyright (c) 2001 Matej Pfajfar.
   2  * Copyright (c) 2001-2004, Roger Dingledine.
   3  * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
   4  * Copyright (c) 2007-2021, The Tor Project, Inc. */
   5 /* See LICENSE for licensing information */
   6
   7 /**
   8  * @file evloop_sys.c
   9  * @brief Subsystem definition for the event loop module
  10  **/
  11
  12 #include "orconfig.h"
  13 #include "lib/subsys/subsys.h"
  14 #include "lib/evloop/compat_libevent.h"
  15 #include "lib/evloop/evloop_sys.h"
  16 #include "lib/log/log.h"
  17
  18 static int
  19 subsys_evloop_initialize(void)
  20 {
  21   if (tor_init_libevent_rng() < 0) {
  22     log_warn(LD_NET, "Problem initializing libevent RNG.");
  23     return -1;
  24   }
  25   return 0;
  26 }
  27
  28 static void
  29 subsys_evloop_postfork(void)
  30 {
  31 #ifdef TOR_UNIT_TESTS
  32   tor_libevent_postfork();
  33 #endif
  34 }
  35
  36 static void
  37 subsys_evloop_shutdown(void)
  38 {
  39   tor_libevent_free_all();
  40 }
  41
  42 const struct subsys_fns_t sys_evloop = {
  43   .name = "evloop",
  44   SUBSYS_DECLARE_LOCATION(),
  45   .supported = true,
  46   .level = -20,
  47   .initialize = subsys_evloop_initialize,
  48   .shutdown = subsys_evloop_shutdown,
  49   .postfork = subsys_evloop_postfork,
  50 };