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mainloop_sys.c (2038B)

      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 mainloop_sys.c
      9 * @brief Declare the "mainloop" subsystem.
     10 **/
     11 
     12 #include "core/or/or.h"
     13 #include "core/mainloop/mainloop_sys.h"
     14 #include "core/mainloop/mainloop.h"
     15 #include "core/mainloop/mainloop_state_st.h"
     16 #include "core/mainloop/netstatus.h"
     17 #include "lib/conf/conftypes.h"
     18 #include "lib/conf/confdecl.h"
     19 
     20 #include "lib/subsys/subsys.h"
     21 
     22 static int
     23 subsys_mainloop_initialize(void)
     24 {
     25  initialize_periodic_events();
     26  return 0;
     27 }
     28 
     29 static void
     30 subsys_mainloop_shutdown(void)
     31 {
     32  tor_mainloop_free_all();
     33 }
     34 
     35 /** Declare a list of state variables for mainloop state. */
     36 #define CONF_CONTEXT TABLE
     37 #include "core/mainloop/mainloop_state.inc"
     38 #undef CONF_CONTEXT
     39 
     40 /** Magic number for mainloop state objects */
     41 #define MAINLOOP_STATE_MAGIC 0x59455449
     42 
     43 /**
     44 * Format object for mainloop state.
     45 **/
     46 static config_format_t mainloop_state_fmt = {
     47  .size = sizeof(mainloop_state_t),
     48  .magic = { "mainloop_state",
     49             MAINLOOP_STATE_MAGIC,
     50             offsetof(mainloop_state_t, magic)
     51            },
     52  .vars = mainloop_state_t_vars,
     53 };
     54 
     55 /**
     56 */
     57 static int
     58 mainloop_set_state(void *arg)
     59 {
     60  const mainloop_state_t *state = arg;
     61  tor_assert(state->magic == MAINLOOP_STATE_MAGIC);
     62 
     63  netstatus_load_from_state(state, approx_time());
     64 
     65  return 0;
     66 }
     67 
     68 static int
     69 mainloop_flush_state(void *arg)
     70 {
     71  mainloop_state_t *state = arg;
     72  tor_assert(state->magic == MAINLOOP_STATE_MAGIC);
     73 
     74  netstatus_flush_to_state(state, approx_time());
     75 
     76  return 0;
     77 }
     78 
     79 const struct subsys_fns_t sys_mainloop = {
     80  .name = "mainloop",
     81  SUBSYS_DECLARE_LOCATION(),
     82  .supported = true,
     83  .level = 5,
     84  .initialize = subsys_mainloop_initialize,
     85  .shutdown = subsys_mainloop_shutdown,
     86 
     87  .state_format = &mainloop_state_fmt,
     88  .set_state = mainloop_set_state,
     89  .flush_state = mainloop_flush_state,
     90 };