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Comparing libev/ev++.h (file contents):
Revision 1.1 by root, Sat Nov 10 21:19:30 2007 UTC vs.
Revision 1.22 by root, Thu Jan 10 06:00:55 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
4/* work in progress, don't use unless you know what you are doing */ 43#ifdef EV_H
44# include EV_H
45#else
46# include "ev.h"
47#endif
5 48
6namespace ev { 49namespace ev {
7 50
8 template<class watcher> 51 template<class ev_watcher, class watcher>
9 class callback 52 struct base : ev_watcher
10 { 53 {
11 struct object { }; 54 #if EV_MULTIPLICITY
55 EV_P;
12 56
13 void *obj; 57 void set (EV_P)
14 void (object::*meth)(watcher &, int);
15
16 /* a proxy is a kind of recipe on how to call a specific class method */
17 struct proxy_base {
18 virtual void call (void *obj, void (object::*meth)(watcher &, int), watcher &w, int) const = 0;
19 };
20 template<class O1, class O2>
21 struct proxy : proxy_base {
22 virtual void call (void *obj, void (object::*meth)(watcher &, int), watcher &w, int e) const
23 { 58 {
24 ((reinterpret_cast<O1 *>(obj)) ->* (reinterpret_cast<void (O2::*)(watcher &, int)>(meth))) 59 this->EV_A = EV_A;
25 (w, e);
26 } 60 }
61 #endif
62
63 base ()
64 {
65 ev_init (this, 0);
27 }; 66 }
28 67
29 proxy_base *prxy; 68 void set_ (void *data, void (*cb)(EV_P_ ev_watcher *w, int revents))
30
31 public:
32 template<class O1, class O2>
33 explicit callback (O1 *object, void (O2::*method)(watcher &, int))
34 {
35 static proxy<O1,O2> p;
36 obj = reinterpret_cast<void *>(object);
37 meth = reinterpret_cast<void (object::*)(watcher &, int)>(method);
38 prxy = &p;
39 } 69 {
40 70 this->data = data;
41 void call (watcher *w, int e) const 71 ev_set_cb (static_cast<ev_watcher *>(this), cb);
42 { 72 }
43 return prxy->call (obj, meth, *w, e); 73
74 // method callback
75 template<class K, void (K::*method)(watcher &w, int)>
76 void set (K *object)
77 {
78 set_ (object, method_thunk<K, method>);
79 }
80
81 template<class K, void (K::*method)(watcher &w, int)>
82 static void method_thunk (EV_P_ ev_watcher *w, int revents)
83 {
84 K *obj = static_cast<K *>(w->data);
85 (obj->*method) (*static_cast<watcher *>(w), revents);
86 }
87
88 // const method callback
89 template<class K, void (K::*method)(watcher &w, int) const>
90 void set (const K *object)
91 {
92 set_ (object, const_method_thunk<K, method>);
93 }
94
95 template<class K, void (K::*method)(watcher &w, int) const>
96 static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
97 {
98 K *obj = static_cast<K *>(w->data);
99 (static_cast<K *>(w->data)->*method) (*static_cast<watcher *>(w), revents);
100 }
101
102 // function callback
103 template<void (*function)(watcher &w, int)>
104 void set (void *data = 0)
105 {
106 set_ (data, function_thunk<function>);
107 }
108
109 template<void (*function)(watcher &w, int)>
110 static void function_thunk (EV_P_ ev_watcher *w, int revents)
111 {
112 function (*static_cast<watcher *>(w), revents);
113 }
114
115 // simple callback
116 template<class K, void (K::*method)()>
117 void set (K *object)
118 {
119 set_ (object, method_noargs_thunk<K, method>);
120 }
121
122 template<class K, void (K::*method)()>
123 static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
124 {
125 K *obj = static_cast<K *>(w->data);
126 (obj->*method) ();
127 }
128
129 void operator ()(int events = EV_UNDEF)
130 {
131 return ev_cb (static_cast<ev_watcher *>(this))
132 (static_cast<ev_watcher *>(this), events);
133 }
134
135 bool is_active () const
136 {
137 return ev_is_active (static_cast<const ev_watcher *>(this));
138 }
139
140 bool is_pending () const
141 {
142 return ev_is_pending (static_cast<const ev_watcher *>(this));
44 } 143 }
45 }; 144 };
46 145
47 #include "ev.h" 146 enum {
147 UNDEF = EV_UNDEF,
148 NONE = EV_NONE,
149 READ = EV_READ,
150 WRITE = EV_WRITE,
151 TIMEOUT = EV_TIMEOUT,
152 PERIODIC = EV_PERIODIC,
153 SIGNAL = EV_SIGNAL,
154 CHILD = EV_CHILD,
155 STAT = EV_STAT,
156 IDLE = EV_IDLE,
157 CHECK = EV_CHECK,
158 PREPARE = EV_PREPARE,
159 FORK = EV_FORK,
160 EMBED = EV_EMBED,
161 ERROR = EV_ERROR,
162 };
48 163
49 typedef ev_tstamp tstamp; 164 typedef ev_tstamp tstamp;
50 165
51 inline ev_tstamp now (EV_P) 166 inline ev_tstamp now (EV_P)
52 { 167 {
53 return ev_now (EV_A); 168 return ev_now (EV_A);
54 } 169 }
55 170
56 #if EV_MULTIPLICITY 171 #if EV_MULTIPLICITY
57
58 #define EV_CONSTRUCT(cppstem) \
59 EV_P; \ 172 #define EV_CONSTRUCT \
60 \
61 void set (EV_P) \ 173 (EV_P = EV_DEFAULT) \
62 { \ 174 { \
63 this->EV_A = EV_A; \
64 } \
65 \ 175 set (EV_A); \
66 template<class O1, class O2> \ 176 }
67 explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int), EV_P = ev_default_loop (0)) \
68 : callback<cppstem> (object, method), EV_A (EV_A)
69
70 #else 177 #else
71 178 #define EV_CONSTRUCT \
72 #define EV_CONSTRUCT(cppstem) \ 179 () \
73 template<class O1, class O2> \ 180 { \
74 explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int)) \ 181 }
75 : callback<cppstem> (object, method)
76
77 #endif 182 #endif
78 183
79 /* using a template here would require quite a bit more lines, 184 /* using a template here would require quite a bit more lines,
80 * so a macro solution was chosen */ 185 * so a macro solution was chosen */
81 #define EV_DECLARE_WATCHER(cppstem,cstem) \ 186 #define EV_BEGIN_WATCHER(cppstem,cstem) \
82 \ 187 \
83 extern "C" void cb_ ## cppstem (struct ev_ ## cstem *w, int revents); \
84 \
85 struct cppstem : ev_ ## cstem, callback<cppstem> \ 188 struct cppstem : base<ev_ ## cstem, cppstem> \
86 { \ 189 { \
87 EV_CONSTRUCT (cppstem) \
88 { \
89 ev_init (static_cast<ev_ ## cstem *>(this), cb_ ## cppstem); \
90 } \
91 \
92 bool is_active () const \
93 { \
94 return ev_is_active (static_cast<const ev_ ## cstem *>(this)); \
95 } \
96 \
97 bool is_pending () const \
98 { \
99 return ev_is_pending (static_cast<const ev_ ## cstem *>(this)); \
100 } \
101 \
102 void start () \ 190 void start () \
103 { \ 191 { \
104 ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \ 192 ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
105 } \ 193 } \
106 \ 194 \
107 void stop () \ 195 void stop () \
108 { \ 196 { \
109 ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \ 197 ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
110 } \ 198 } \
111 \ 199 \
112 void operator ()(int events = EV_UNDEF) \ 200 cppstem EV_CONSTRUCT \
201 \
202 ~cppstem () \
113 { \ 203 { \
114 return call (this, events); \ 204 stop (); \
115 } \ 205 } \
116 \ 206 \
207 using base<ev_ ## cstem, cppstem>::set; \
208 \
117 private: \ 209 private: \
118 \ 210 \
119 cppstem (const cppstem &o) \ 211 cppstem (const cppstem &o) \
120 : callback<cppstem> (this, (void (cppstem::*)(cppstem &, int))0) \
121 { /* disabled */ } \ 212 { /* disabled */ } \
213 \
122 void operator =(const cppstem &o) { /* disabled */ } \ 214 void operator =(const cppstem &o) { /* disabled */ } \
123 \ 215 \
124 public: 216 public:
125 217
218 #define EV_END_WATCHER(cppstem,cstem) \
219 };
220
126 EV_DECLARE_WATCHER (io, io) 221 EV_BEGIN_WATCHER (io, io)
127 void set (int fd, int events) 222 void set (int fd, int events)
128 { 223 {
129 int active = is_active (); 224 int active = is_active ();
130 if (active) stop (); 225 if (active) stop ();
131 ev_io_set (static_cast<ev_io *>(this), fd, events); 226 ev_io_set (static_cast<ev_io *>(this), fd, events);
… …
143 void start (int fd, int events) 238 void start (int fd, int events)
144 { 239 {
145 set (fd, events); 240 set (fd, events);
146 start (); 241 start ();
147 } 242 }
148 }; 243 EV_END_WATCHER (io, io)
149 244
150 EV_DECLARE_WATCHER (timer, timer) 245 EV_BEGIN_WATCHER (timer, timer)
151 void set (ev_tstamp after, ev_tstamp repeat = 0.) 246 void set (ev_tstamp after, ev_tstamp repeat = 0.)
152 { 247 {
153 int active = is_active (); 248 int active = is_active ();
154 if (active) stop (); 249 if (active) stop ();
155 ev_timer_set (static_cast<ev_timer *>(this), after, repeat); 250 ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
… …
164 259
165 void again () 260 void again ()
166 { 261 {
167 ev_timer_again (EV_A_ static_cast<ev_timer *>(this)); 262 ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
168 } 263 }
169 }; 264 EV_END_WATCHER (timer, timer)
170 265
266 #if EV_PERIODIC_ENABLE
171 EV_DECLARE_WATCHER (periodic, periodic) 267 EV_BEGIN_WATCHER (periodic, periodic)
172 void set (ev_tstamp at, ev_tstamp interval = 0.) 268 void set (ev_tstamp at, ev_tstamp interval = 0.)
173 { 269 {
174 int active = is_active (); 270 int active = is_active ();
175 if (active) stop (); 271 if (active) stop ();
176 ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0); 272 ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
… …
185 281
186 void again () 282 void again ()
187 { 283 {
188 ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this)); 284 ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
189 } 285 }
190 }; 286 EV_END_WATCHER (periodic, periodic)
287 #endif
191 288
192 EV_DECLARE_WATCHER (idle, idle)
193 };
194
195 EV_DECLARE_WATCHER (prepare, prepare)
196 };
197
198 EV_DECLARE_WATCHER (check, check)
199 };
200
201 EV_DECLARE_WATCHER (sig, signal) 289 EV_BEGIN_WATCHER (sig, signal)
202 void set (int signum) 290 void set (int signum)
203 { 291 {
204 int active = is_active (); 292 int active = is_active ();
205 if (active) stop (); 293 if (active) stop ();
206 ev_signal_set (static_cast<ev_signal *>(this), signum); 294 ev_signal_set (static_cast<ev_signal *>(this), signum);
… …
210 void start (int signum) 298 void start (int signum)
211 { 299 {
212 set (signum); 300 set (signum);
213 start (); 301 start ();
214 } 302 }
215 }; 303 EV_END_WATCHER (sig, signal)
216 304
217 EV_DECLARE_WATCHER (child, child) 305 EV_BEGIN_WATCHER (child, child)
218 void set (int pid) 306 void set (int pid)
219 { 307 {
220 int active = is_active (); 308 int active = is_active ();
221 if (active) stop (); 309 if (active) stop ();
222 ev_child_set (static_cast<ev_child *>(this), pid); 310 ev_child_set (static_cast<ev_child *>(this), pid);
… …
226 void start (int pid) 314 void start (int pid)
227 { 315 {
228 set (pid); 316 set (pid);
229 start (); 317 start ();
230 } 318 }
231 }; 319 EV_END_WATCHER (child, child)
320
321 #if EV_STAT_ENABLE
322 EV_BEGIN_WATCHER (stat, stat)
323 void set (const char *path, ev_tstamp interval = 0.)
324 {
325 int active = is_active ();
326 if (active) stop ();
327 ev_stat_set (static_cast<ev_stat *>(this), path, interval);
328 if (active) start ();
329 }
330
331 void start (const char *path, ev_tstamp interval = 0.)
332 {
333 stop ();
334 set (path, interval);
335 start ();
336 }
337
338 void update ()
339 {
340 ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
341 }
342 EV_END_WATCHER (stat, stat)
343 #endif
344
345 EV_BEGIN_WATCHER (idle, idle)
346 void set () { }
347 EV_END_WATCHER (idle, idle)
348
349 EV_BEGIN_WATCHER (prepare, prepare)
350 void set () { }
351 EV_END_WATCHER (prepare, prepare)
352
353 EV_BEGIN_WATCHER (check, check)
354 void set () { }
355 EV_END_WATCHER (check, check)
356
357 #if EV_EMBED_ENABLE
358 EV_BEGIN_WATCHER (embed, embed)
359 void start (struct ev_loop *embedded_loop)
360 {
361 stop ();
362 ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
363 start ();
364 }
365
366 void sweep ()
367 {
368 ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
369 }
370 EV_END_WATCHER (embed, embed)
371 #endif
372
373 #if EV_FORK_ENABLE
374 EV_BEGIN_WATCHER (fork, fork)
375 void set () { }
376 EV_END_WATCHER (fork, fork)
377 #endif
232 378
233 #undef EV_CONSTRUCT 379 #undef EV_CONSTRUCT
380 #undef EV_BEGIN_WATCHER
234 #undef EV_DECLARE_WATCHER 381 #undef EV_END_WATCHER
235} 382}
236 383
237#endif 384#endif
238 385

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