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89 lines
3.4 KiB
C
89 lines
3.4 KiB
C
/* Copyright (c) 2015-2017, The Tor Project, Inc. */
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/* See LICENSE for licensing information */
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#ifndef TOR_PERIODIC_H
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#define TOR_PERIODIC_H
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#define PERIODIC_EVENT_NO_UPDATE (-1)
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/* Tor roles for which a periodic event item is for. An event can be for
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* multiple roles, they can be combined. */
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#define PERIODIC_EVENT_ROLE_CLIENT (1U << 0)
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#define PERIODIC_EVENT_ROLE_RELAY (1U << 1)
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#define PERIODIC_EVENT_ROLE_BRIDGE (1U << 2)
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#define PERIODIC_EVENT_ROLE_DIRAUTH (1U << 3)
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#define PERIODIC_EVENT_ROLE_BRIDGEAUTH (1U << 4)
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#define PERIODIC_EVENT_ROLE_HS_SERVICE (1U << 5)
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#define PERIODIC_EVENT_ROLE_DIRSERVER (1U << 6)
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/* Helper macro to make it a bit less annoying to defined groups of roles that
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* are often used. */
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/* Router that is a Bridge or Relay. */
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#define PERIODIC_EVENT_ROLE_ROUTER \
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(PERIODIC_EVENT_ROLE_BRIDGE | PERIODIC_EVENT_ROLE_RELAY)
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/* Authorities that is both bridge and directory. */
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#define PERIODIC_EVENT_ROLE_AUTHORITIES \
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(PERIODIC_EVENT_ROLE_BRIDGEAUTH | PERIODIC_EVENT_ROLE_DIRAUTH)
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/* All roles. */
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#define PERIODIC_EVENT_ROLE_ALL \
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(PERIODIC_EVENT_ROLE_AUTHORITIES | PERIODIC_EVENT_ROLE_CLIENT | \
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PERIODIC_EVENT_ROLE_HS_SERVICE | PERIODIC_EVENT_ROLE_ROUTER)
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/*
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* Event flags which can change the behavior of an event.
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*/
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/* Indicate that the event needs the network meaning that if we are in
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* DisableNetwork or hibernation mode, the event won't be enabled. This obey
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* the net_is_disabled() check. */
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#define PERIODIC_EVENT_FLAG_NEED_NET (1U << 0)
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/** Callback function for a periodic event to take action. The return value
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* influences the next time the function will get called. Return
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* PERIODIC_EVENT_NO_UPDATE to not update <b>last_action_time</b> and be polled
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* again in the next second. If a positive value is returned it will update the
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* interval time. */
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typedef int (*periodic_event_helper_t)(time_t now,
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const or_options_t *options);
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struct mainloop_event_t;
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/** A single item for the periodic-events-function table. */
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typedef struct periodic_event_item_t {
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periodic_event_helper_t fn; /**< The function to run the event */
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time_t last_action_time; /**< The last time the function did something */
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struct mainloop_event_t *ev; /**< Libevent callback we're using to implement
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* this */
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const char *name; /**< Name of the function -- for debug */
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/* Bitmask of roles define above for which this event applies. */
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uint32_t roles;
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/* Bitmask of flags which can change the behavior of the event. */
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uint32_t flags;
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/* Indicate that this event has been enabled that is scheduled. */
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unsigned int enabled : 1;
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} periodic_event_item_t;
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/** events will get their interval from first execution */
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#define PERIODIC_EVENT(fn, r, f) { fn##_callback, 0, NULL, #fn, r, f, 0 }
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#define END_OF_PERIODIC_EVENTS { NULL, 0, NULL, NULL, 0, 0, 0 }
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/* Return true iff the given event was setup before thus is enabled to be
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* scheduled. */
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static inline int
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periodic_event_is_enabled(const periodic_event_item_t *item)
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{
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return item->enabled;
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}
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void periodic_event_launch(periodic_event_item_t *event);
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void periodic_event_setup(periodic_event_item_t *event);
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void periodic_event_destroy(periodic_event_item_t *event);
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void periodic_event_reschedule(periodic_event_item_t *event);
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void periodic_event_enable(periodic_event_item_t *event);
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void periodic_event_disable(periodic_event_item_t *event);
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#endif /* !defined(TOR_PERIODIC_H) */
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