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6494772e32
These structures used TAILQ for the lists of events waiting on a single fd or signal. But order doesn't matter for these lists; only the order of the active events lists actually matters.
157 lines
4.3 KiB
C
157 lines
4.3 KiB
C
/*
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* Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
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* Copyright (c) 2007-2010 Niels Provos and Nick Mathewson
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _EVENT2_EVENT_STRUCT_H_
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#define _EVENT2_EVENT_STRUCT_H_
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/** @file event_struct.h
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Structures used by event.h. Using these structures directly may harm
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forward compatibility: be careful!
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <event-config.h>
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#ifdef _EVENT_HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef _EVENT_HAVE_SYS_TIME_H
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#include <sys/time.h>
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#endif
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/* For int types. */
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#include <event2/util.h>
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#define EVLIST_TIMEOUT 0x01
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#define EVLIST_INSERTED 0x02
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#define EVLIST_SIGNAL 0x04
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#define EVLIST_ACTIVE 0x08
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#define EVLIST_INTERNAL 0x10
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#define EVLIST_INIT 0x80
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/* EVLIST_X_ Private space: 0x1000-0xf000 */
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#define EVLIST_ALL (0xf000 | 0x9f)
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/* Fix so that people don't have to run with <sys/queue.h> */
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#ifndef TAILQ_ENTRY
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#define _EVENT_DEFINED_TQENTRY
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#define TAILQ_ENTRY(type) \
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struct { \
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struct type *tqe_next; /* next element */ \
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struct type **tqe_prev; /* address of previous next element */ \
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}
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#endif /* !TAILQ_ENTRY */
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/* Fix so that people don't have to run with <sys/queue.h> */
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#ifndef LIST_ENTRY
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#define _EVENT_DEFINED_LISTENTRY
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#define LIST_ENTRY(type) \
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struct { \
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struct type *le_next; /* next element */ \
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struct type **le_prev; /* address of previous next element */ \
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}
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#endif /* !TAILQ_ENTRY */
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struct event_base;
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struct event {
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TAILQ_ENTRY (event) (ev_active_next);
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TAILQ_ENTRY (event) (ev_next);
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/* for managing timeouts */
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union {
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TAILQ_ENTRY (event) (ev_next_with_common_timeout);
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int min_heap_idx;
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} ev_timeout_pos;
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evutil_socket_t ev_fd;
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struct event_base *ev_base;
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union {
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/* used for io events */
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struct {
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LIST_ENTRY (event) (ev_io_next);
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struct timeval ev_timeout;
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} ev_io;
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/* used by signal events */
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struct {
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LIST_ENTRY (event) (ev_signal_next);
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short ev_ncalls;
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/* Allows deletes in callback */
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short *ev_pncalls;
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} ev_signal;
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} _ev;
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short ev_events;
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short ev_res; /* result passed to event callback */
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short ev_flags;
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ev_uint8_t ev_pri; /* smaller numbers are higher priority */
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ev_uint8_t ev_closure;
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struct timeval ev_timeout;
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/* allows us to adopt for different types of events */
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void (*ev_callback)(evutil_socket_t, short, void *arg);
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void *ev_arg;
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};
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/*
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* Key-Value pairs. Can be used for HTTP headers but also for
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* query argument parsing.
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*/
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struct evkeyval {
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TAILQ_ENTRY(evkeyval) next;
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char *key;
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char *value;
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};
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#ifdef _EVENT_DEFINED_TQENTRY
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#undef TAILQ_ENTRY
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struct event_list;
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struct evkeyvalq;
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#undef _EVENT_DEFINED_TQENTRY
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#else
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TAILQ_HEAD (event_list, event);
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TAILQ_HEAD (evkeyvalq, evkeyval);
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#endif /* _EVENT_DEFINED_TQENTRY */
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#ifdef _EVENT_DEFINED_LISTENTRY
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#undef LIST_ENTRY
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struct event_dlist;
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#undef _EVENT_DEFINED_LISTENTRY
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#else
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LIST_HEAD (event_dlist, event);
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#endif /* _EVENT_DEFINED_LISTENTRY */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _EVENT2_EVENT_STRUCT_H_ */
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