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Diffstat (limited to 'external/unbound/util/mini_event.h')
| -rw-r--r-- | external/unbound/util/mini_event.h | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/external/unbound/util/mini_event.h b/external/unbound/util/mini_event.h deleted file mode 100644 index 204894d97..000000000 --- a/external/unbound/util/mini_event.h +++ /dev/null @@ -1,192 +0,0 @@ -/* - * mini-event.h - micro implementation of libevent api, using select() only. - * - * Copyright (c) 2007, NLnet Labs. All rights reserved. - * - * This software is open source. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * - * Redistributions in binary form must reproduce the above copyright notice, - * this list of conditions and the following disclaimer in the documentation - * and/or other materials provided with the distribution. - * - * Neither the name of the NLNET LABS nor the names of its contributors may - * be used to endorse or promote products derived from this software without - * specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED - * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF - * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING - * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -/** - * \file - * This file implements part of the event(3) libevent api. - * The back end is only select. Max number of fds is limited. - * Max number of signals is limited, one handler per signal only. - * And one handler per fd. - * - * Although limited to select() and a max (1024) open fds, it - * is efficient: - * o dispatch call caches fd_sets to use. - * o handler calling takes time ~ to the number of fds. - * o timeouts are stored in a redblack tree, sorted, so take log(n). - * Timeouts are only accurate to the second (no subsecond accuracy). - * To avoid cpu hogging, fractional timeouts are rounded up to a whole second. - */ - -#ifndef MINI_EVENT_H -#define MINI_EVENT_H - -#if defined(USE_MINI_EVENT) && !defined(USE_WINSOCK) - -#ifndef HAVE_EVENT_BASE_FREE -#define HAVE_EVENT_BASE_FREE -#endif - -/* redefine to use our own namespace so that on platforms where - * linkers crosslink library-private symbols with other symbols, it works */ -#define event_init minievent_init -#define event_get_version minievent_get_version -#define event_get_method minievent_get_method -#define event_base_dispatch minievent_base_dispatch -#define event_base_loopexit minievent_base_loopexit -#define event_base_free minievent_base_free -#define event_set minievent_set -#define event_base_set minievent_base_set -#define event_add minievent_add -#define event_del minievent_del -#define signal_add minisignal_add -#define signal_del minisignal_del - -/** event timeout */ -#define EV_TIMEOUT 0x01 -/** event fd readable */ -#define EV_READ 0x02 -/** event fd writable */ -#define EV_WRITE 0x04 -/** event signal */ -#define EV_SIGNAL 0x08 -/** event must persist */ -#define EV_PERSIST 0x10 - -/* needs our redblack tree */ -#include "rbtree.h" - -/** max number of file descriptors to support */ -#define MAX_FDS 1024 -/** max number of signals to support */ -#define MAX_SIG 32 - -/** event base */ -struct event_base -{ - /** sorted by timeout (absolute), ptr */ - rbtree_type* times; - /** array of 0 - maxfd of ptr to event for it */ - struct event** fds; - /** max fd in use */ - int maxfd; - /** capacity - size of the fds array */ - int capfd; - /* fdset for read write, for fds ready, and added */ - fd_set - /** fds for reading */ - reads, - /** fds for writing */ - writes, - /** fds determined ready for use */ - ready, - /** ready plus newly added events. */ - content; - /** array of 0 - maxsig of ptr to event for it */ - struct event** signals; - /** if we need to exit */ - int need_to_exit; - /** where to store time in seconds */ - time_t* time_secs; - /** where to store time in microseconds */ - struct timeval* time_tv; -}; - -/** - * Event structure. Has some of the event elements. - */ -struct event { - /** node in timeout rbtree */ - rbnode_type node; - /** is event already added */ - int added; - - /** event base it belongs to */ - struct event_base *ev_base; - /** fd to poll or -1 for timeouts. signal number for sigs. */ - int ev_fd; - /** what events this event is interested in, see EV_.. above. */ - short ev_events; - /** timeout value */ - struct timeval ev_timeout; - - /** callback to call: fd, eventbits, userarg */ - void (*ev_callback)(int, short, void *arg); - /** callback user arg */ - void *ev_arg; -}; - -/* function prototypes (some are as they appear in event.h) */ -/** create event base */ -void *event_init(time_t* time_secs, struct timeval* time_tv); -/** get version */ -const char *event_get_version(void); -/** get polling method, select */ -const char *event_get_method(void); -/** run select in a loop */ -int event_base_dispatch(struct event_base *); -/** exit that loop */ -int event_base_loopexit(struct event_base *, struct timeval *); -/** free event base. Free events yourself */ -void event_base_free(struct event_base *); -/** set content of event */ -void event_set(struct event *, int, short, void (*)(int, short, void *), void *); -/** add event to a base. You *must* call this for every event. */ -int event_base_set(struct event_base *, struct event *); -/** add event to make it active. You may not change it with event_set anymore */ -int event_add(struct event *, struct timeval *); -/** remove event. You may change it again */ -int event_del(struct event *); - -/** add a timer */ -#define evtimer_add(ev, tv) event_add(ev, tv) -/** remove a timer */ -#define evtimer_del(ev) event_del(ev) - -/* uses different implementation. Cannot mix fd/timeouts and signals inside - * the same struct event. create several event structs for that. */ -/** install signal handler */ -int signal_add(struct event *, struct timeval *); -/** set signal event contents */ -#define signal_set(ev, x, cb, arg) \ - event_set(ev, x, EV_SIGNAL|EV_PERSIST, cb, arg) -/** remove signal handler */ -int signal_del(struct event *); - -#endif /* USE_MINI_EVENT and not USE_WINSOCK */ - -/** compare events in tree, based on timevalue, ptr for uniqueness */ -int mini_ev_cmp(const void* a, const void* b); - -#endif /* MINI_EVENT_H */ |