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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 1.21 by root, Tue Dec 25 07:05:45 2007 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 template<class ev_watcher, class watcher>
9 class callback 52 struct base : ev_watcher
10 { 53 {
11 struct klass; // it is vital that this is never defined 54 #if EV_MULTIPLICITY
55 EV_P;
12 56
13 klass *o; 57 void set (EV_P)
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 { 58 {
20 o = reinterpret_cast<klass *>(object); 59 this->EV_A = EV_A;
21 m = reinterpret_cast<void (klass::*)(watcher &, int)>(method);
22 } 60 }
61 #endif
23 62
24 // this works because a standards-compliant C++ compiler 63 base ()
25 // basically can't help it: it doesn't have the knowledge 64 {
26 // required to miscompile (klass is not defined anywhere 65 ev_init (this, 0);
27 // and nothing is known about the constructor arguments) :)
28 void call (watcher *w, int revents)
29 { 66 }
30 (o->*m) (*w, revents); 67
68 void set_ (void *data, void (*cb)(EV_P_ ev_watcher *w, int revents))
69 {
70 this->data = data;
71 ev_set_cb (static_cast<ev_watcher *>(this), cb);
72 }
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));
31 } 143 }
32 }; 144 };
33 145
34 enum { 146 enum {
35 UNDEF = EV_UNDEF, 147 UNDEF = EV_UNDEF,
… …
55 { 167 {
56 return ev_now (EV_A); 168 return ev_now (EV_A);
57 } 169 }
58 170
59 #if EV_MULTIPLICITY 171 #if EV_MULTIPLICITY
60
61 #define EV_CONSTRUCT(cppstem) \
62 EV_P; \ 172 #define EV_CONSTRUCT \
63 \
64 void set (EV_P) \ 173 (EV_P = EV_DEFAULT) \
65 { \ 174 { \
66 this->EV_A = EV_A; \
67 } \
68 \ 175 set (EV_A); \
69 template<class O1, class O2> \ 176 }
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 177 #else
74 178 #define EV_CONSTRUCT \
75 #define EV_CONSTRUCT(cppstem) \ 179 () \
76 template<class O1, class O2> \ 180 { \
77 explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int)) \ 181 }
78 : callback<cppstem> (object, method)
79
80 #endif 182 #endif
81 183
82 /* using a template here would require quite a bit more lines, 184 /* using a template here would require quite a bit more lines,
83 * so a macro solution was chosen */ 185 * so a macro solution was chosen */
84 #define EV_BEGIN_WATCHER(cppstem,cstem) \ 186 #define EV_BEGIN_WATCHER(cppstem,cstem) \
85 \ 187 \
86 struct cppstem : ev_ ## cstem, callback<cppstem> \ 188 struct cppstem : base<ev_ ## cstem, cppstem> \
87 { \ 189 { \
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 () \ 190 void start () \
104 { \ 191 { \
105 ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \ 192 ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
106 } \ 193 } \
107 \ 194 \
108 void stop () \ 195 void stop () \
109 { \ 196 { \
110 ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \ 197 ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
111 } \ 198 } \
112 \ 199 \
113 void operator ()(int events = EV_UNDEF) \
114 { \ 200 cppstem EV_CONSTRUCT \
115 return call (this, events); \
116 } \
117 \ 201 \
118 ~cppstem () \ 202 ~cppstem () \
119 { \ 203 { \
120 stop (); \ 204 stop (); \
121 } \ 205 } \
122 \ 206 \
207 using base<ev_ ## cstem, cppstem>::set; \
208 \
123 private: \ 209 private: \
124 \ 210 \
125 cppstem (const cppstem &o) \ 211 cppstem (const cppstem &o) \
126 : callback<cppstem> (this, (void (cppstem::*)(cppstem &, int))0) \
127 { /* disabled */ } \ 212 { /* disabled */ } \
128 \ 213 \
129 void operator =(const cppstem &o) { /* disabled */ } \ 214 void operator =(const cppstem &o) { /* disabled */ } \
130 \
131 static void thunk (EV_P_ struct ev_ ## cstem *w, int revents) \
132 { \
133 (*static_cast<cppstem *>(w))(revents); \
134 } \
135 \ 215 \
136 public: 216 public:
137 217
138 #define EV_END_WATCHER(cppstem,cstem) \ 218 #define EV_END_WATCHER(cppstem,cstem) \
139 }; 219 };
… …
248 if (active) start (); 328 if (active) start ();
249 } 329 }
250 330
251 void start (const char *path, ev_tstamp interval = 0.) 331 void start (const char *path, ev_tstamp interval = 0.)
252 { 332 {
333 stop ();
253 set (path, interval); 334 set (path, interval);
254 start (); 335 start ();
255 } 336 }
256 337
257 void update () 338 void update ()
… …
273 void set () { } 354 void set () { }
274 EV_END_WATCHER (check, check) 355 EV_END_WATCHER (check, check)
275 356
276 #if EV_EMBED_ENABLE 357 #if EV_EMBED_ENABLE
277 EV_BEGIN_WATCHER (embed, embed) 358 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) 359 void start (struct ev_loop *embedded_loop)
287 { 360 {
288 set (embedded_loop); 361 stop ();
362 ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
289 start (); 363 start ();
290 } 364 }
291 365
292 void sweep () 366 void sweep ()
293 { 367 {

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