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Comparing libev/ev++.h (file contents):
Revision 1.11 by root, Tue Nov 27 22:31:52 2007 UTC vs.
Revision 1.25 by llucax, Fri Jan 18 18:13:40 2008 UTC

1/*
2 * libev simple C++ wrapper classes
3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
38 */
39
1#ifndef EVPP_H__ 40#ifndef EVPP_H__
2#define EVPP_H__ 41#define EVPP_H__
3 42
43#ifdef EV_H
44# include EV_H
45#else
4#include "ev.h" 46# include "ev.h"
47#endif
5 48
6namespace ev { 49namespace ev {
7 50
8 template<class watcher> 51 typedef ev_tstamp tstamp;
9 class callback
10 {
11 struct klass; // it is vital that this is never defined
12
13 klass *o;
14 void (klass::*m)(watcher &, int);
15
16 public:
17 template<class O1, class O2>
18 explicit callback (O1 *object, void (O2::*method)(watcher &, int))
19 {
20 o = reinterpret_cast<klass *>(object);
21 m = reinterpret_cast<void (klass::*)(watcher &, int)>(method);
22 }
23
24 // this works because a standards-compliant C++ compiler
25 // basically can't help it: it doesn't have the knowledge
26 // required to miscompile (klass is not defined anywhere
27 // and nothing is known about the constructor arguments) :)
28 void call (watcher *w, int revents)
29 {
30 (o->*m) (*w, revents);
31 }
32 };
33 52
34 enum { 53 enum {
35 UNDEF = EV_UNDEF, 54 UNDEF = EV_UNDEF,
36 NONE = EV_NONE, 55 NONE = EV_NONE,
37 READ = EV_READ, 56 READ = EV_READ,
… …
47 FORK = EV_FORK, 66 FORK = EV_FORK,
48 EMBED = EV_EMBED, 67 EMBED = EV_EMBED,
49 ERROR = EV_ERROR, 68 ERROR = EV_ERROR,
50 }; 69 };
51 70
52 typedef ev_tstamp tstamp; 71 enum
72 {
73 AUTO = EVFLAG_AUTO,
74 NOENV = EVFLAG_NOENV,
75 FORKCHECK = EVFLAG_FORKCHECK,
76 SELECT = EVBACKEND_SELECT,
77 POLL = EVBACKEND_POLL,
78 EPOLL = EVBACKEND_EPOLL,
79 KQUEUE = EVBACKEND_KQUEUE,
80 DEVPOLL = EVBACKEND_DEVPOLL,
81 PORT = EVBACKEND_PORT
82 };
83
84 enum
85 {
86 NONBLOCK = EVLOOP_NONBLOCK,
87 ONESHOT = EVLOOP_ONESHOT
88 };
89
90 enum how_t
91 {
92 ONE = EVUNLOOP_ONE,
93 ALL = EVUNLOOP_ALL
94 };
95
96 template<class ev_watcher, class watcher>
97 struct base : ev_watcher
98 {
99 #if EV_MULTIPLICITY
100 EV_P;
101
102 void set (EV_P)
103 {
104 this->EV_A = EV_A;
105 }
106 #endif
107
108 base ()
109 {
110 ev_init (this, 0);
111 }
112
113 void set_ (void *data, void (*cb)(EV_P_ ev_watcher *w, int revents))
114 {
115 this->data = data;
116 ev_set_cb (static_cast<ev_watcher *>(this), cb);
117 }
118
119 // method callback
120 template<class K, void (K::*method)(watcher &w, int)>
121 void set (K *object)
122 {
123 set_ (object, method_thunk<K, method>);
124 }
125
126 template<class K, void (K::*method)(watcher &w, int)>
127 static void method_thunk (EV_P_ ev_watcher *w, int revents)
128 {
129 K *obj = static_cast<K *>(w->data);
130 (obj->*method) (*static_cast<watcher *>(w), revents);
131 }
132
133 // const method callback
134 template<class K, void (K::*method)(watcher &w, int) const>
135 void set (const K *object)
136 {
137 set_ (object, const_method_thunk<K, method>);
138 }
139
140 template<class K, void (K::*method)(watcher &w, int) const>
141 static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
142 {
143 K *obj = static_cast<K *>(w->data);
144 (static_cast<K *>(w->data)->*method) (*static_cast<watcher *>(w), revents);
145 }
146
147 // function callback
148 template<void (*function)(watcher &w, int)>
149 void set (void *data = 0)
150 {
151 set_ (data, function_thunk<function>);
152 }
153
154 template<void (*function)(watcher &w, int)>
155 static void function_thunk (EV_P_ ev_watcher *w, int revents)
156 {
157 function (*static_cast<watcher *>(w), revents);
158 }
159
160 // simple callback
161 template<class K, void (K::*method)()>
162 void set (K *object)
163 {
164 set_ (object, method_noargs_thunk<K, method>);
165 }
166
167 template<class K, void (K::*method)()>
168 static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
169 {
170 K *obj = static_cast<K *>(w->data);
171 (obj->*method) ();
172 }
173
174 void operator ()(int events = EV_UNDEF)
175 {
176 return ev_cb (static_cast<ev_watcher *>(this))
177 (static_cast<ev_watcher *>(this), events);
178 }
179
180 bool is_active () const
181 {
182 return ev_is_active (static_cast<const ev_watcher *>(this));
183 }
184
185 bool is_pending () const
186 {
187 return ev_is_pending (static_cast<const ev_watcher *>(this));
188 }
189 };
190
53 191
54 inline ev_tstamp now (EV_P) 192 inline ev_tstamp now (EV_P)
55 { 193 {
56 return ev_now (EV_A); 194 return ev_now (EV_A);
57 } 195 }
58 196
59 #if EV_MULTIPLICITY 197 #if EV_MULTIPLICITY
60
61 #define EV_CONSTRUCT(cppstem) \
62 EV_P; \ 198 #define EV_CONSTRUCT \
63 \
64 void set (EV_P) \ 199 (EV_P = EV_DEFAULT) \
65 { \ 200 { \
66 this->EV_A = EV_A; \
67 } \
68 \ 201 set (EV_A); \
69 template<class O1, class O2> \ 202 }
70 explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int), EV_P = ev_default_loop (0)) \
71 : callback<cppstem> (object, method), EV_A (EV_A)
72
73 #else 203 #else
74 204 #define EV_CONSTRUCT \
75 #define EV_CONSTRUCT(cppstem) \ 205 () \
76 template<class O1, class O2> \ 206 { \
77 explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int)) \ 207 }
78 : callback<cppstem> (object, method)
79
80 #endif 208 #endif
81 209
82 /* using a template here would require quite a bit more lines, 210 /* using a template here would require quite a bit more lines,
83 * so a macro solution was chosen */ 211 * so a macro solution was chosen */
84 #define EV_BEGIN_WATCHER(cppstem,cstem) \ 212 #define EV_BEGIN_WATCHER(cppstem,cstem) \
85 \ 213 \
86 struct cppstem : ev_ ## cstem, callback<cppstem> \ 214 struct cppstem : base<ev_ ## cstem, cppstem> \
87 { \ 215 { \
88 EV_CONSTRUCT (cppstem) \
89 { \
90 ev_init (static_cast<ev_ ## cstem *>(this), thunk); \
91 } \
92 \
93 bool is_active () const \
94 { \
95 return ev_is_active (static_cast<const ev_ ## cstem *>(this)); \
96 } \
97 \
98 bool is_pending () const \
99 { \
100 return ev_is_pending (static_cast<const ev_ ## cstem *>(this)); \
101 } \
102 \
103 void start () \ 216 void start () \
104 { \ 217 { \
105 ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \ 218 ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
106 } \ 219 } \
107 \ 220 \
108 void stop () \ 221 void stop () \
109 { \ 222 { \
110 ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \ 223 ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
111 } \ 224 } \
112 \ 225 \
113 void operator ()(int events = EV_UNDEF) \
114 { \ 226 cppstem EV_CONSTRUCT \
115 return call (this, events); \
116 } \
117 \ 227 \
118 ~cppstem () \ 228 ~cppstem () \
119 { \ 229 { \
120 stop (); \ 230 stop (); \
121 } \ 231 } \
122 \ 232 \
233 using base<ev_ ## cstem, cppstem>::set; \
234 \
123 private: \ 235 private: \
124 \ 236 \
125 cppstem (const cppstem &o) \ 237 cppstem (const cppstem &o); \
126 : callback<cppstem> (this, (void (cppstem::*)(cppstem &, int))0) \
127 { /* disabled */ } \
128 \
129 void operator =(const cppstem &o) { /* disabled */ } \
130 \
131 static void thunk (EV_P_ struct ev_ ## cstem *w, int revents) \
132 { \ 238 \
133 (*static_cast<cppstem *>(w))(revents); \ 239 cppstem & operator =(const cppstem &o); \
134 } \
135 \ 240 \
136 public: 241 public:
137 242
138 #define EV_END_WATCHER(cppstem,cstem) \ 243 #define EV_END_WATCHER(cppstem,cstem) \
139 }; 244 };
… …
248 if (active) start (); 353 if (active) start ();
249 } 354 }
250 355
251 void start (const char *path, ev_tstamp interval = 0.) 356 void start (const char *path, ev_tstamp interval = 0.)
252 { 357 {
358 stop ();
253 set (path, interval); 359 set (path, interval);
254 start (); 360 start ();
255 } 361 }
256 362
257 void update () 363 void update ()
… …
273 void set () { } 379 void set () { }
274 EV_END_WATCHER (check, check) 380 EV_END_WATCHER (check, check)
275 381
276 #if EV_EMBED_ENABLE 382 #if EV_EMBED_ENABLE
277 EV_BEGIN_WATCHER (embed, embed) 383 EV_BEGIN_WATCHER (embed, embed)
278 void set (struct ev_loop *loop)
279 {
280 int active = is_active ();
281 if (active) stop ();
282 ev_embed_set (static_cast<ev_embed *>(this), loop);
283 if (active) start ();
284 }
285
286 void start (struct ev_loop *embedded_loop) 384 void start (struct ev_loop *embedded_loop)
287 { 385 {
288 set (embedded_loop); 386 stop ();
387 ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
289 start (); 388 start ();
290 } 389 }
291 390
292 void sweep () 391 void sweep ()
293 { 392 {

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