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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 1.24 by llucax, Fri Jan 18 18:13:21 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 typedef ev_tstamp tstamp;
9 class callback 52
53 enum {
54 UNDEF = EV_UNDEF,
55 NONE = EV_NONE,
56 READ = EV_READ,
57 WRITE = EV_WRITE,
58 TIMEOUT = EV_TIMEOUT,
59 PERIODIC = EV_PERIODIC,
60 SIGNAL = EV_SIGNAL,
61 CHILD = EV_CHILD,
62 STAT = EV_STAT,
63 IDLE = EV_IDLE,
64 CHECK = EV_CHECK,
65 PREPARE = EV_PREPARE,
66 FORK = EV_FORK,
67 EMBED = EV_EMBED,
68 ERROR = EV_ERROR,
69 };
70
71 template<class ev_watcher, class watcher>
72 struct base : ev_watcher
10 { 73 {
11 struct object { }; 74 #if EV_MULTIPLICITY
75 EV_P;
12 76
13 void *obj; 77 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 { 78 {
24 ((reinterpret_cast<O1 *>(obj)) ->* (reinterpret_cast<void (O2::*)(watcher &, int)>(meth))) 79 this->EV_A = EV_A;
25 (w, e);
26 } 80 }
81 #endif
82
83 base ()
84 {
85 ev_init (this, 0);
27 }; 86 }
28 87
29 proxy_base *prxy; 88 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 } 89 {
40 90 this->data = data;
41 void call (watcher *w, int e) const 91 ev_set_cb (static_cast<ev_watcher *>(this), cb);
42 { 92 }
43 return prxy->call (obj, meth, *w, e); 93
94 // method callback
95 template<class K, void (K::*method)(watcher &w, int)>
96 void set (K *object)
97 {
98 set_ (object, method_thunk<K, method>);
99 }
100
101 template<class K, void (K::*method)(watcher &w, int)>
102 static void method_thunk (EV_P_ ev_watcher *w, int revents)
103 {
104 K *obj = static_cast<K *>(w->data);
105 (obj->*method) (*static_cast<watcher *>(w), revents);
106 }
107
108 // const method callback
109 template<class K, void (K::*method)(watcher &w, int) const>
110 void set (const K *object)
111 {
112 set_ (object, const_method_thunk<K, method>);
113 }
114
115 template<class K, void (K::*method)(watcher &w, int) const>
116 static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
117 {
118 K *obj = static_cast<K *>(w->data);
119 (static_cast<K *>(w->data)->*method) (*static_cast<watcher *>(w), revents);
120 }
121
122 // function callback
123 template<void (*function)(watcher &w, int)>
124 void set (void *data = 0)
125 {
126 set_ (data, function_thunk<function>);
127 }
128
129 template<void (*function)(watcher &w, int)>
130 static void function_thunk (EV_P_ ev_watcher *w, int revents)
131 {
132 function (*static_cast<watcher *>(w), revents);
133 }
134
135 // simple callback
136 template<class K, void (K::*method)()>
137 void set (K *object)
138 {
139 set_ (object, method_noargs_thunk<K, method>);
140 }
141
142 template<class K, void (K::*method)()>
143 static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
144 {
145 K *obj = static_cast<K *>(w->data);
146 (obj->*method) ();
147 }
148
149 void operator ()(int events = EV_UNDEF)
150 {
151 return ev_cb (static_cast<ev_watcher *>(this))
152 (static_cast<ev_watcher *>(this), events);
153 }
154
155 bool is_active () const
156 {
157 return ev_is_active (static_cast<const ev_watcher *>(this));
158 }
159
160 bool is_pending () const
161 {
162 return ev_is_pending (static_cast<const ev_watcher *>(this));
44 } 163 }
45 }; 164 };
46 165
47 #include "ev.h"
48
49 typedef ev_tstamp tstamp;
50 166
51 inline ev_tstamp now (EV_P) 167 inline ev_tstamp now (EV_P)
52 { 168 {
53 return ev_now (EV_A); 169 return ev_now (EV_A);
54 } 170 }
55 171
56 #if EV_MULTIPLICITY 172 #if EV_MULTIPLICITY
57
58 #define EV_CONSTRUCT(cppstem) \
59 EV_P; \ 173 #define EV_CONSTRUCT \
60 \
61 void set (EV_P) \ 174 (EV_P = EV_DEFAULT) \
62 { \ 175 { \
63 this->EV_A = EV_A; \
64 } \
65 \ 176 set (EV_A); \
66 template<class O1, class O2> \ 177 }
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 178 #else
71 179 #define EV_CONSTRUCT \
72 #define EV_CONSTRUCT(cppstem) \ 180 () \
73 template<class O1, class O2> \ 181 { \
74 explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int)) \ 182 }
75 : callback<cppstem> (object, method)
76
77 #endif 183 #endif
78 184
79 /* using a template here would require quite a bit more lines, 185 /* using a template here would require quite a bit more lines,
80 * so a macro solution was chosen */ 186 * so a macro solution was chosen */
81 #define EV_DECLARE_WATCHER(cppstem,cstem) \ 187 #define EV_BEGIN_WATCHER(cppstem,cstem) \
82 \ 188 \
83 extern "C" void cb_ ## cppstem (struct ev_ ## cstem *w, int revents); \
84 \
85 struct cppstem : ev_ ## cstem, callback<cppstem> \ 189 struct cppstem : base<ev_ ## cstem, cppstem> \
86 { \ 190 { \
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 () \ 191 void start () \
103 { \ 192 { \
104 ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \ 193 ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
105 } \ 194 } \
106 \ 195 \
107 void stop () \ 196 void stop () \
108 { \ 197 { \
109 ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \ 198 ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
110 } \ 199 } \
111 \ 200 \
112 void operator ()(int events = EV_UNDEF) \ 201 cppstem EV_CONSTRUCT \
202 \
203 ~cppstem () \
113 { \ 204 { \
114 return call (this, events); \ 205 stop (); \
115 } \ 206 } \
116 \ 207 \
208 using base<ev_ ## cstem, cppstem>::set; \
209 \
117 private: \ 210 private: \
118 \ 211 \
119 cppstem (const cppstem &o) \ 212 cppstem (const cppstem &o); \
120 : callback<cppstem> (this, (void (cppstem::*)(cppstem &, int))0) \ 213 \
121 { /* disabled */ } \ 214 cppstem & operator =(const cppstem &o); \
122 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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