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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 1.24 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
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 object { };
12
13 void *obj;
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 {
24 ((reinterpret_cast<O1 *>(obj)) ->* (reinterpret_cast<void (O2::*)(watcher &, int)>(meth)))
25 (w, e);
26 }
27 };
28
29 proxy_base *prxy;
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 }
40
41 void call (watcher *w, int e) const
42 {
43 return prxy->call (obj, meth, *w, e);
44 }
45 };
46 52
47 enum { 53 enum {
48 UNDEF = EV_UNDEF, 54 UNDEF = EV_UNDEF,
49 NONE = EV_NONE, 55 NONE = EV_NONE,
50 READ = EV_READ, 56 READ = EV_READ,
… …
60 FORK = EV_FORK, 66 FORK = EV_FORK,
61 EMBED = EV_EMBED, 67 EMBED = EV_EMBED,
62 ERROR = EV_ERROR, 68 ERROR = EV_ERROR,
63 }; 69 };
64 70
65 typedef ev_tstamp tstamp; 71 template<class ev_watcher, class watcher>
72 struct base : ev_watcher
73 {
74 #if EV_MULTIPLICITY
75 EV_P;
76
77 void set (EV_P)
78 {
79 this->EV_A = EV_A;
80 }
81 #endif
82
83 base ()
84 {
85 ev_init (this, 0);
86 }
87
88 void set_ (void *data, void (*cb)(EV_P_ ev_watcher *w, int revents))
89 {
90 this->data = data;
91 ev_set_cb (static_cast<ev_watcher *>(this), cb);
92 }
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));
163 }
164 };
165
66 166
67 inline ev_tstamp now (EV_P) 167 inline ev_tstamp now (EV_P)
68 { 168 {
69 return ev_now (EV_A); 169 return ev_now (EV_A);
70 } 170 }
71 171
72 #if EV_MULTIPLICITY 172 #if EV_MULTIPLICITY
73
74 #define EV_CONSTRUCT(cppstem) \
75 EV_P; \ 173 #define EV_CONSTRUCT \
76 \
77 void set (EV_P) \ 174 (EV_P = EV_DEFAULT) \
78 { \ 175 { \
79 this->EV_A = EV_A; \
80 } \
81 \ 176 set (EV_A); \
82 template<class O1, class O2> \ 177 }
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 178 #else
87 179 #define EV_CONSTRUCT \
88 #define EV_CONSTRUCT(cppstem) \ 180 () \
89 template<class O1, class O2> \ 181 { \
90 explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int)) \ 182 }
91 : callback<cppstem> (object, method)
92
93 #endif 183 #endif
94 184
95 /* using a template here would require quite a bit more lines, 185 /* using a template here would require quite a bit more lines,
96 * so a macro solution was chosen */ 186 * so a macro solution was chosen */
97 #define EV_BEGIN_WATCHER(cppstem,cstem) \ 187 #define EV_BEGIN_WATCHER(cppstem,cstem) \
98 \ 188 \
99 struct cppstem : ev_ ## cstem, callback<cppstem> \ 189 struct cppstem : base<ev_ ## cstem, cppstem> \
100 { \ 190 { \
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 () \ 191 void start () \
117 { \ 192 { \
118 ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \ 193 ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
119 } \ 194 } \
120 \ 195 \
121 void stop () \ 196 void stop () \
122 { \ 197 { \
123 ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \ 198 ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
124 } \ 199 } \
125 \ 200 \
126 void operator ()(int events = EV_UNDEF) \
127 { \ 201 cppstem EV_CONSTRUCT \
128 return call (this, events); \
129 } \
130 \ 202 \
131 ~cppstem () \ 203 ~cppstem () \
132 { \ 204 { \
133 stop (); \ 205 stop (); \
134 } \ 206 } \
135 \ 207 \
208 using base<ev_ ## cstem, cppstem>::set; \
209 \
136 private: \ 210 private: \
137 \ 211 \
138 cppstem (const cppstem &o) \ 212 cppstem (const cppstem &o); \
139 : callback<cppstem> (this, (void (cppstem::*)(cppstem &, int))0) \
140 { /* disabled */ } \
141 \
142 void operator =(const cppstem &o) { /* disabled */ } \
143 \
144 static void thunk (EV_P_ struct ev_ ## cstem *w, int revents) \
145 { \ 213 \
146 (*static_cast<cppstem *>(w))(revents); \ 214 cppstem & operator =(const cppstem &o); \
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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