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38 lines
1.4 KiB
C
38 lines
1.4 KiB
C
/* Copyright (c) 2015-2016, 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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/** 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 event;
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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 event *ev; /**< Libevent callback we're using to implement this */
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const char *name; /**< Name of the function -- for debug */
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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) { fn##_callback, 0, NULL, #fn }
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#define END_OF_PERIODIC_EVENTS { NULL, 0, NULL, NULL }
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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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#endif
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