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Comparing libev/ev++.h (file contents):
Revision 1.9 by root, Tue Nov 27 10:59:10 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
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 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 enum { 146 enum {
48 UNDEF = EV_UNDEF, 147 UNDEF = EV_UNDEF,
… …
68 { 167 {
69 return ev_now (EV_A); 168 return ev_now (EV_A);
70 } 169 }
71 170
72 #if EV_MULTIPLICITY 171 #if EV_MULTIPLICITY
73
74 #define EV_CONSTRUCT(cppstem) \
75 EV_P; \ 172 #define EV_CONSTRUCT \
76 \
77 void set (EV_P) \ 173 (EV_P = EV_DEFAULT) \
78 { \ 174 { \
79 this->EV_A = EV_A; \
80 } \
81 \ 175 set (EV_A); \
82 template<class O1, class O2> \ 176 }
83 explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int), EV_P = ev_default_loop (0)) \
84 : callback<cppstem> (object, method), EV_A (EV_A)
85
86 #else 177 #else
87 178 #define EV_CONSTRUCT \
88 #define EV_CONSTRUCT(cppstem) \ 179 () \
89 template<class O1, class O2> \ 180 { \
90 explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int)) \ 181 }
91 : callback<cppstem> (object, method)
92
93 #endif 182 #endif
94 183
95 /* using a template here would require quite a bit more lines, 184 /* using a template here would require quite a bit more lines,
96 * so a macro solution was chosen */ 185 * so a macro solution was chosen */
97 #define EV_BEGIN_WATCHER(cppstem,cstem) \ 186 #define EV_BEGIN_WATCHER(cppstem,cstem) \
98 \ 187 \
99 struct cppstem : ev_ ## cstem, callback<cppstem> \ 188 struct cppstem : base<ev_ ## cstem, cppstem> \
100 { \ 189 { \
101 EV_CONSTRUCT (cppstem) \
102 { \
103 ev_init (static_cast<ev_ ## cstem *>(this), thunk); \
104 } \
105 \
106 bool is_active () const \
107 { \
108 return ev_is_active (static_cast<const ev_ ## cstem *>(this)); \
109 } \
110 \
111 bool is_pending () const \
112 { \
113 return ev_is_pending (static_cast<const ev_ ## cstem *>(this)); \
114 } \
115 \
116 void start () \ 190 void start () \
117 { \ 191 { \
118 ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \ 192 ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
119 } \ 193 } \
120 \ 194 \
121 void stop () \ 195 void stop () \
122 { \ 196 { \
123 ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \ 197 ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
124 } \ 198 } \
125 \ 199 \
126 void operator ()(int events = EV_UNDEF) \
127 { \ 200 cppstem EV_CONSTRUCT \
128 return call (this, events); \
129 } \
130 \ 201 \
131 ~cppstem () \ 202 ~cppstem () \
132 { \ 203 { \
133 stop (); \ 204 stop (); \
134 } \ 205 } \
135 \ 206 \
207 using base<ev_ ## cstem, cppstem>::set; \
208 \
136 private: \ 209 private: \
137 \ 210 \
138 cppstem (const cppstem &o) \ 211 cppstem (const cppstem &o) \
139 : callback<cppstem> (this, (void (cppstem::*)(cppstem &, int))0) \
140 { /* disabled */ } \ 212 { /* disabled */ } \
141 \ 213 \
142 void operator =(const cppstem &o) { /* disabled */ } \ 214 void operator =(const cppstem &o) { /* disabled */ } \
143 \
144 static void thunk (EV_P_ struct ev_ ## cstem *w, int revents) \
145 { \
146 (*static_cast<cppstem *>(w))(revents); \
147 } \
148 \ 215 \
149 public: 216 public:
150 217
151 #define EV_END_WATCHER(cppstem,cstem) \ 218 #define EV_END_WATCHER(cppstem,cstem) \
152 }; 219 };
… …
261 if (active) start (); 328 if (active) start ();
262 } 329 }
263 330
264 void start (const char *path, ev_tstamp interval = 0.) 331 void start (const char *path, ev_tstamp interval = 0.)
265 { 332 {
333 stop ();
266 set (path, interval); 334 set (path, interval);
267 start (); 335 start ();
268 } 336 }
269 337
270 void update () 338 void update ()
… …
286 void set () { } 354 void set () { }
287 EV_END_WATCHER (check, check) 355 EV_END_WATCHER (check, check)
288 356
289 #if EV_EMBED_ENABLE 357 #if EV_EMBED_ENABLE
290 EV_BEGIN_WATCHER (embed, embed) 358 EV_BEGIN_WATCHER (embed, embed)
291 void set (struct ev_loop *loop)
292 {
293 int active = is_active ();
294 if (active) stop ();
295 ev_embed_set (static_cast<ev_embed *>(this), loop);
296 if (active) start ();
297 }
298
299 void start (struct ev_loop *embedded_loop) 359 void start (struct ev_loop *embedded_loop)
300 { 360 {
301 set (embedded_loop); 361 stop ();
362 ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
302 start (); 363 start ();
303 } 364 }
304 365
305 void sweep () 366 void sweep ()
306 { 367 {
307 ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this)); 368 ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
308 } 369 }
309 EV_END_WATCHER (embed, embed) 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)
310 #endif 377 #endif
311 378
312 #undef EV_CONSTRUCT 379 #undef EV_CONSTRUCT
313 #undef EV_BEGIN_WATCHER 380 #undef EV_BEGIN_WATCHER
314 #undef EV_END_WATCHER 381 #undef EV_END_WATCHER

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