2 * util/ub_event.c - directly call libevent (compatability) functions
4 * Copyright (c) 2007, NLnet Labs. All rights reserved.
6 * This software is open source.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * Redistributions of source code must retain the above copyright notice,
13 * this list of conditions and the following disclaimer.
15 * Redistributions in binary form must reproduce the above copyright notice,
16 * this list of conditions and the following disclaimer in the documentation
17 * and/or other materials provided with the distribution.
19 * Neither the name of the NLNET LABS nor the names of its contributors may
20 * be used to endorse or promote products derived from this software without
21 * specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
27 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
29 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
30 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 * This file contains and implementation for the indirection layer for pluggable
40 * events that transparently passes it either directly to libevent, or calls
41 * the libevent compatibility layer functions.
45 #include "util/ub_event.h"
47 #include "util/netevent.h"
48 #include "util/tube.h"
50 /* We define libevent structures here to hide the libevent stuff. */
54 # include "util/winsock_event.h"
56 # include "util/mini_event.h"
57 # endif /* USE_WINSOCK */
58 #else /* USE_MINI_EVENT */
63 # include "event2/event.h"
64 # include "event2/event_struct.h"
65 # include "event2/event_compat.h"
67 #endif /* USE_MINI_EVENT */
69 #if UB_EV_TIMEOUT != EV_TIMEOUT || UB_EV_READ != EV_READ || \
70 UB_EV_WRITE != EV_WRITE || UB_EV_SIGNAL != EV_SIGNAL || \
71 UB_EV_PERSIST != EV_PERSIST
72 /* Only necessary for libev */
73 # define NATIVE_BITS(b) ( \
74 (((b) & UB_EV_TIMEOUT) ? EV_TIMEOUT : 0) \
75 | (((b) & UB_EV_READ ) ? EV_READ : 0) \
76 | (((b) & UB_EV_WRITE ) ? EV_WRITE : 0) \
77 | (((b) & UB_EV_SIGNAL ) ? EV_SIGNAL : 0) \
78 | (((b) & UB_EV_PERSIST) ? EV_PERSIST : 0))
80 # define UB_EV_BITS(b) ( \
81 (((b) & EV_TIMEOUT) ? UB_EV_TIMEOUT : 0) \
82 | (((b) & EV_READ ) ? UB_EV_READ : 0) \
83 | (((b) & EV_WRITE ) ? UB_EV_WRITE : 0) \
84 | (((b) & EV_SIGNAL ) ? UB_EV_SIGNAL : 0) \
85 | (((b) & EV_PERSIST) ? UB_EV_PERSIST : 0))
87 # define UB_EV_BITS_CB(C) void my_ ## C (int fd, short bits, void *arg) \
88 { (C)(fd, UB_EV_BITS(bits), arg); }
90 UB_EV_BITS_CB(comm_point_udp_callback);
91 UB_EV_BITS_CB(comm_point_udp_ancil_callback)
92 UB_EV_BITS_CB(comm_point_tcp_accept_callback)
93 UB_EV_BITS_CB(comm_point_tcp_handle_callback)
94 UB_EV_BITS_CB(comm_timer_callback)
95 UB_EV_BITS_CB(comm_signal_callback)
96 UB_EV_BITS_CB(comm_point_local_handle_callback)
97 UB_EV_BITS_CB(comm_point_raw_handle_callback)
98 UB_EV_BITS_CB(comm_point_http_handle_callback)
99 UB_EV_BITS_CB(tube_handle_signal)
100 UB_EV_BITS_CB(comm_base_handle_slow_accept)
102 static void (*NATIVE_BITS_CB(void (*cb)(int, short, void*)))(int, short, void*)
104 if(cb == comm_point_udp_callback)
105 return my_comm_point_udp_callback;
106 else if(cb == comm_point_udp_ancil_callback)
107 return my_comm_point_udp_ancil_callback;
108 else if(cb == comm_point_tcp_accept_callback)
109 return my_comm_point_tcp_accept_callback;
110 else if(cb == comm_point_tcp_handle_callback)
111 return my_comm_point_tcp_handle_callback;
112 else if(cb == comm_timer_callback)
113 return my_comm_timer_callback;
114 else if(cb == comm_signal_callback)
115 return my_comm_signal_callback;
116 else if(cb == comm_point_local_handle_callback)
117 return my_comm_point_local_handle_callback;
118 else if(cb == comm_point_raw_handle_callback)
119 return my_comm_point_raw_handle_callback;
120 else if(cb == comm_point_http_handle_callback)
121 return my_comm_point_http_handle_callback;
122 else if(cb == tube_handle_signal)
123 return my_tube_handle_signal;
124 else if(cb == comm_base_handle_slow_accept)
125 return my_comm_base_handle_slow_accept;
127 log_assert(0); /* this NULL callback pointer should not happen,
128 we should have the necessary routine listed above */
133 # define NATIVE_BITS(b) (b)
134 # define NATIVE_BITS_CB(c) (c)
138 #define EVFLAG_AUTO 0
141 #define AS_EVENT_BASE(x) ((struct event_base*)x)
142 #define AS_UB_EVENT_BASE(x) ((struct ub_event_base*)x)
143 #define AS_EVENT(x) ((struct event*)x)
144 #define AS_UB_EVENT(x) ((struct ub_event*)x)
146 const char* ub_event_get_version(void)
148 return event_get_version();
151 #if (defined(HAVE_EV_LOOP) || defined(HAVE_EV_DEFAULT_LOOP)) && defined(EVBACKEND_SELECT)
152 static const char* ub_ev_backend2str(int b)
155 case EVBACKEND_SELECT: return "select";
156 case EVBACKEND_POLL: return "poll";
157 case EVBACKEND_EPOLL: return "epoll";
158 case EVBACKEND_KQUEUE: return "kqueue";
159 case EVBACKEND_DEVPOLL: return "devpoll";
160 case EVBACKEND_PORT: return "evport";
167 ub_get_event_sys(struct ub_event_base* base, const char** n, const char** s,
174 *m = "WSAWaitForMultipleEvents";
175 #elif defined(USE_MINI_EVENT)
181 struct event_base* b = AS_EVENT_BASE(base);
182 *s = event_get_version();
183 # if defined(HAVE_EV_LOOP) || defined(HAVE_EV_DEFAULT_LOOP)
186 b = (struct event_base*)ev_default_loop(EVFLAG_AUTO);
187 # ifdef EVBACKEND_SELECT
188 *m = ub_ev_backend2str(ev_backend((struct ev_loop*)b));
190 *m = "not obtainable";
192 # elif defined(HAVE_EVENT_BASE_GET_METHOD)
195 b = event_base_new();
196 *m = event_base_get_method(b);
199 *m = "not obtainable";
202 # ifdef HAVE_EVENT_BASE_FREE
203 if (b && b != AS_EVENT_BASE(base))
209 struct ub_event_base*
210 ub_default_event_base(int sigs, time_t* time_secs, struct timeval* time_tv)
215 #ifdef USE_MINI_EVENT
217 /* use mini event time-sharing feature */
218 base = event_init(time_secs, time_tv);
222 # if defined(HAVE_EV_LOOP) || defined(HAVE_EV_DEFAULT_LOOP)
225 base = ev_default_loop(EVFLAG_AUTO);
227 base = ev_loop_new(EVFLAG_AUTO);
230 # ifdef HAVE_EVENT_BASE_NEW
231 base = event_base_new();
237 return (struct ub_event_base*)base;
240 struct ub_event_base *
241 ub_libevent_event_base(struct event_base* libevent_base)
243 #ifdef USE_MINI_EVENT
247 return AS_UB_EVENT_BASE(libevent_base);
252 ub_libevent_get_event_base(struct ub_event_base* base)
254 #ifdef USE_MINI_EVENT
258 return AS_EVENT_BASE(base);
263 ub_event_base_free(struct ub_event_base* base)
265 #ifdef USE_MINI_EVENT
266 event_base_free(AS_EVENT_BASE(base));
267 #elif defined(HAVE_EVENT_BASE_FREE) && defined(HAVE_EVENT_BASE_ONCE)
268 /* only libevent 1.2+ has it, but in 1.2 it is broken -
269 assertion fails on signal handling ev that is not deleted
270 in libevent 1.3c (event_base_once appears) this is fixed. */
271 event_base_free(AS_EVENT_BASE(base));
274 #endif /* HAVE_EVENT_BASE_FREE and HAVE_EVENT_BASE_ONCE */
278 ub_event_base_dispatch(struct ub_event_base* base)
280 return event_base_dispatch(AS_EVENT_BASE(base));
284 ub_event_base_loopexit(struct ub_event_base* base)
286 return event_base_loopexit(AS_EVENT_BASE(base), NULL);
290 ub_event_new(struct ub_event_base* base, int fd, short bits,
291 void (*cb)(int, short, void*), void* arg)
293 struct event *ev = (struct event*)calloc(1, sizeof(struct event));
298 #ifndef HAVE_EVENT_ASSIGN
299 event_set(ev, fd, NATIVE_BITS(bits), NATIVE_BITS_CB(cb), arg);
300 if (event_base_set(AS_EVENT_BASE(base), ev) != 0) {
305 if (event_assign(ev, AS_EVENT_BASE(base), fd, bits, cb, arg) != 0) {
310 return AS_UB_EVENT(ev);
314 ub_signal_new(struct ub_event_base* base, int fd,
315 void (*cb)(int, short, void*), void* arg)
317 struct event *ev = (struct event*)calloc(1, sizeof(struct event));
322 #if !HAVE_DECL_EVSIGNAL_ASSIGN
323 signal_set(ev, fd, NATIVE_BITS_CB(cb), arg);
324 if (event_base_set(AS_EVENT_BASE(base), ev) != 0) {
329 if (evsignal_assign(ev, AS_EVENT_BASE(base), fd, cb, arg) != 0) {
334 return AS_UB_EVENT(ev);
338 ub_winsock_register_wsaevent(struct ub_event_base* base, void* wsaevent,
339 void (*cb)(int, short, void*), void* arg)
341 #if defined(USE_MINI_EVENT) && defined(USE_WINSOCK)
342 struct event *ev = (struct event*)calloc(1, sizeof(struct event));
347 if (winsock_register_wsaevent(AS_EVENT_BASE(base), ev, wsaevent, cb,
349 return AS_UB_EVENT(ev);
362 ub_event_add_bits(struct ub_event* ev, short bits)
364 AS_EVENT(ev)->ev_events |= NATIVE_BITS(bits);
368 ub_event_del_bits(struct ub_event* ev, short bits)
370 AS_EVENT(ev)->ev_events &= ~NATIVE_BITS(bits);
374 ub_event_set_fd(struct ub_event* ev, int fd)
376 AS_EVENT(ev)->ev_fd = fd;
380 ub_event_free(struct ub_event* ev)
387 ub_event_add(struct ub_event* ev, struct timeval* tv)
389 return event_add(AS_EVENT(ev), tv);
393 ub_event_del(struct ub_event* ev)
395 return event_del(AS_EVENT(ev));
399 ub_timer_add(struct ub_event* ev, struct ub_event_base* base,
400 void (*cb)(int, short, void*), void* arg, struct timeval* tv)
402 event_set(AS_EVENT(ev), -1, EV_TIMEOUT, NATIVE_BITS_CB(cb), arg);
403 if (event_base_set(AS_EVENT_BASE(base), AS_EVENT(ev)) != 0)
405 return evtimer_add(AS_EVENT(ev), tv);
409 ub_timer_del(struct ub_event* ev)
411 return evtimer_del(AS_EVENT(ev));
415 ub_signal_add(struct ub_event* ev, struct timeval* tv)
417 return signal_add(AS_EVENT(ev), tv);
421 ub_signal_del(struct ub_event* ev)
423 return signal_del(AS_EVENT(ev));
427 ub_winsock_unregister_wsaevent(struct ub_event* ev)
429 #if defined(USE_MINI_EVENT) && defined(USE_WINSOCK)
430 winsock_unregister_wsaevent(AS_EVENT(ev));
438 ub_winsock_tcp_wouldblock(struct ub_event* ev, int eventbits)
440 #if defined(USE_MINI_EVENT) && defined(USE_WINSOCK)
441 winsock_tcp_wouldblock(AS_EVENT(ev), NATIVE_BITS(eventbits));
448 void ub_comm_base_now(struct comm_base* cb)
450 #ifdef USE_MINI_EVENT
451 /** minievent updates the time when it blocks. */
452 (void)cb; /* nothing to do */
453 #else /* !USE_MINI_EVENT */
454 /** fillup the time values in the event base */
457 comm_base_timept(cb, &tt, &tv);
458 if(gettimeofday(tv, NULL) < 0) {
459 log_err("gettimeofday: %s", strerror(errno));
464 #endif /* USE_MINI_EVENT */