Electroneum
mini_event.h
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1 /*
2  * mini-event.h - micro implementation of libevent api, using select() only.
3  *
4  * Copyright (c) 2007, NLnet Labs. All rights reserved.
5  *
6  * This software is open source.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * Redistributions of source code must retain the above copyright notice,
13  * this list of conditions and the following disclaimer.
14  *
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.
18  *
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.
22  *
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.
34  */
35 
52 #ifndef MINI_EVENT_H
53 #define MINI_EVENT_H
54 
55 #if defined(USE_MINI_EVENT) && !defined(USE_WINSOCK)
56 
57 #ifndef HAVE_EVENT_BASE_FREE
58 #define HAVE_EVENT_BASE_FREE
59 #endif
60 
61 /* redefine to use our own namespace so that on platforms where
62  * linkers crosslink library-private symbols with other symbols, it works */
63 #define event_init minievent_init
64 #define event_get_version minievent_get_version
65 #define event_get_method minievent_get_method
66 #define event_base_dispatch minievent_base_dispatch
67 #define event_base_loopexit minievent_base_loopexit
68 #define event_base_free minievent_base_free
69 #define event_set minievent_set
70 #define event_base_set minievent_base_set
71 #define event_add minievent_add
72 #define event_del minievent_del
73 #define signal_add minisignal_add
74 #define signal_del minisignal_del
75 
77 #define EV_TIMEOUT 0x01
78 
79 #define EV_READ 0x02
80 
81 #define EV_WRITE 0x04
82 
83 #define EV_SIGNAL 0x08
84 
85 #define EV_PERSIST 0x10
86 
87 /* needs our redblack tree */
88 #include "rbtree.h"
89 
91 #define MAX_FDS 1024
92 
93 #define MAX_SIG 32
94 
96 struct event_base
97 {
99  rbtree_type* times;
101  struct event** fds;
103  int maxfd;
105  int capfd;
106  /* fdset for read write, for fds ready, and added */
107  fd_set
109  reads,
111  writes,
113  ready,
115  content;
117  struct event** signals;
119  int need_to_exit;
121  time_t* time_secs;
123  struct timeval* time_tv;
124 };
125 
129 struct event {
131  rbnode_type node;
133  int added;
134 
136  struct event_base *ev_base;
138  int ev_fd;
140  short ev_events;
142  struct timeval ev_timeout;
143 
145  void (*ev_callback)(int, short, void *arg);
147  void *ev_arg;
148 };
149 
150 /* function prototypes (some are as they appear in event.h) */
152 void *event_init(time_t* time_secs, struct timeval* time_tv);
154 const char *event_get_version(void);
156 const char *event_get_method(void);
158 int event_base_dispatch(struct event_base *);
160 int event_base_loopexit(struct event_base *, struct timeval *);
162 void event_base_free(struct event_base *);
164 void event_set(struct event *, int, short, void (*)(int, short, void *), void *);
166 int event_base_set(struct event_base *, struct event *);
168 int event_add(struct event *, struct timeval *);
170 int event_del(struct event *);
171 
173 #define evtimer_add(ev, tv) event_add(ev, tv)
174 
175 #define evtimer_del(ev) event_del(ev)
176 
177 /* uses different implementation. Cannot mix fd/timeouts and signals inside
178  * the same struct event. create several event structs for that. */
180 int signal_add(struct event *, struct timeval *);
182 #define signal_set(ev, x, cb, arg) \
183  event_set(ev, x, EV_SIGNAL|EV_PERSIST, cb, arg)
184 
185 int signal_del(struct event *);
186 
187 #endif /* USE_MINI_EVENT and not USE_WINSOCK */
188 
190 int mini_ev_cmp(const void* a, const void* b);
191 
192 #endif /* MINI_EVENT_H */
const GenericPointer< typename T::ValueType > T2 T::AllocatorType & a
Definition: pointer.h:1124
int mini_ev_cmp(const void *a, const void *b)