ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libev/ev++.h
(Generate patch)

Comparing libev/ev++.h (file contents):
Revision 1.8 by root, Tue Nov 27 08:20:41 2007 UTC vs.
Revision 1.26 by llucax, Fri Jan 18 18:13:57 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,
51 WRITE = EV_WRITE, 57 WRITE = EV_WRITE,
52 TIMEOUT = EV_TIMEOUT, 58 TIMEOUT = EV_TIMEOUT,
53 PERIODIC = EV_PERIODIC, 59 PERIODIC = EV_PERIODIC,
54 SIGNAL = EV_SIGNAL, 60 SIGNAL = EV_SIGNAL,
61 CHILD = EV_CHILD,
62 STAT = EV_STAT,
55 IDLE = EV_IDLE, 63 IDLE = EV_IDLE,
56 CHECK = EV_CHECK, 64 CHECK = EV_CHECK,
57 PREPARE = EV_PREPARE, 65 PREPARE = EV_PREPARE,
58 CHILD = EV_CHILD, 66 FORK = EV_FORK,
67 EMBED = EV_EMBED,
59 ERROR = EV_ERROR, 68 ERROR = EV_ERROR,
60 }; 69 };
61 70
62 typedef ev_tstamp tstamp; 71 enum
72 {
73 AUTO = EVFLAG_AUTO,
74 NOENV = EVFLAG_NOENV,
75 FORKCHECK = EVFLAG_FORKCHECK,
76 SELECT = EVBACKEND_SELECT,
77 POLL = EVBACKEND_POLL,
78 EPOLL = EVBACKEND_EPOLL,
79 KQUEUE = EVBACKEND_KQUEUE,
80 DEVPOLL = EVBACKEND_DEVPOLL,
81 PORT = EVBACKEND_PORT
82 };
83
84 enum
85 {
86 NONBLOCK = EVLOOP_NONBLOCK,
87 ONESHOT = EVLOOP_ONESHOT
88 };
89
90 enum how_t
91 {
92 ONE = EVUNLOOP_ONE,
93 ALL = EVUNLOOP_ALL
94 };
95
96 template<class ev_watcher, class watcher>
97 struct base : ev_watcher
98 {
99 #if EV_MULTIPLICITY
100 EV_P;
101
102 void set (EV_P)
103 {
104 this->EV_A = EV_A;
105 }
106 #endif
107
108 base ()
109 {
110 ev_init (this, 0);
111 }
112
113 void set_ (void *data, void (*cb)(EV_P_ ev_watcher *w, int revents))
114 {
115 this->data = data;
116 ev_set_cb (static_cast<ev_watcher *>(this), cb);
117 }
118
119 // method callback
120 template<class K, void (K::*method)(watcher &w, int)>
121 void set (K *object)
122 {
123 set_ (object, method_thunk<K, method>);
124 }
125
126 template<class K, void (K::*method)(watcher &w, int)>
127 static void method_thunk (EV_P_ ev_watcher *w, int revents)
128 {
129 K *obj = static_cast<K *>(w->data);
130 (obj->*method) (*static_cast<watcher *>(w), revents);
131 }
132
133 // const method callback
134 template<class K, void (K::*method)(watcher &w, int) const>
135 void set (const K *object)
136 {
137 set_ (object, const_method_thunk<K, method>);
138 }
139
140 template<class K, void (K::*method)(watcher &w, int) const>
141 static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
142 {
143 K *obj = static_cast<K *>(w->data);
144 (static_cast<K *>(w->data)->*method) (*static_cast<watcher *>(w), revents);
145 }
146
147 // function callback
148 template<void (*function)(watcher &w, int)>
149 void set (void *data = 0)
150 {
151 set_ (data, function_thunk<function>);
152 }
153
154 template<void (*function)(watcher &w, int)>
155 static void function_thunk (EV_P_ ev_watcher *w, int revents)
156 {
157 function (*static_cast<watcher *>(w), revents);
158 }
159
160 // simple callback
161 template<class K, void (K::*method)()>
162 void set (K *object)
163 {
164 set_ (object, method_noargs_thunk<K, method>);
165 }
166
167 template<class K, void (K::*method)()>
168 static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
169 {
170 K *obj = static_cast<K *>(w->data);
171 (obj->*method) ();
172 }
173
174 void operator ()(int events = EV_UNDEF)
175 {
176 return ev_cb (static_cast<ev_watcher *>(this))
177 (static_cast<ev_watcher *>(this), events);
178 }
179
180 bool is_active () const
181 {
182 return ev_is_active (static_cast<const ev_watcher *>(this));
183 }
184
185 bool is_pending () const
186 {
187 return ev_is_pending (static_cast<const ev_watcher *>(this));
188 }
189 };
190
191 inline void delay (tstamp interval)
192 {
193 ev_sleep (interval);
194 }
195
196 inline int version_major ()
197 {
198 return ev_version_major ();
199 }
200
201 inline int version_minor ()
202 {
203 return ev_version_minor ();
204 }
205
206 inline unsigned int supported_backends ()
207 {
208 return ev_supported_backends ();
209 }
210
211 inline unsigned int recommended_backends ()
212 {
213 return ev_recommended_backends ();
214 }
215
216 inline unsigned int embeddable_backends ()
217 {
218 return ev_embeddable_backends ();
219 }
220
221 inline void set_allocator (void *(*cb)(void *ptr, long size))
222 {
223 ev_set_allocator (cb);
224 }
225
226 inline void set_syserr_cb (void (*cb)(const char *msg))
227 {
228 ev_set_syserr_cb (cb);
229 }
230
63 231
64 inline ev_tstamp now (EV_P) 232 inline ev_tstamp now (EV_P)
65 { 233 {
66 return ev_now (EV_A); 234 return ev_now (EV_A);
67 } 235 }
68 236
69 #if EV_MULTIPLICITY 237 #if EV_MULTIPLICITY
70
71 #define EV_CONSTRUCT(cppstem) \
72 EV_P; \ 238 #define EV_CONSTRUCT \
73 \
74 void set (EV_P) \ 239 (EV_P = EV_DEFAULT) \
75 { \ 240 { \
76 this->EV_A = EV_A; \
77 } \
78 \ 241 set (EV_A); \
79 template<class O1, class O2> \ 242 }
80 explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int), EV_P = ev_default_loop (0)) \
81 : callback<cppstem> (object, method), EV_A (EV_A)
82
83 #else 243 #else
84 244 #define EV_CONSTRUCT \
85 #define EV_CONSTRUCT(cppstem) \ 245 () \
86 template<class O1, class O2> \ 246 { \
87 explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int)) \ 247 }
88 : callback<cppstem> (object, method)
89
90 #endif 248 #endif
91 249
92 /* using a template here would require quite a bit more lines, 250 /* using a template here would require quite a bit more lines,
93 * so a macro solution was chosen */ 251 * so a macro solution was chosen */
94 #define EV_BEGIN_WATCHER(cppstem,cstem) \ 252 #define EV_BEGIN_WATCHER(cppstem,cstem) \
95 \ 253 \
96 struct cppstem : ev_ ## cstem, callback<cppstem> \ 254 struct cppstem : base<ev_ ## cstem, cppstem> \
97 { \ 255 { \
98 EV_CONSTRUCT (cppstem) \
99 { \
100 ev_init (static_cast<ev_ ## cstem *>(this), thunk); \
101 } \
102 \
103 bool is_active () const \
104 { \
105 return ev_is_active (static_cast<const ev_ ## cstem *>(this)); \
106 } \
107 \
108 bool is_pending () const \
109 { \
110 return ev_is_pending (static_cast<const ev_ ## cstem *>(this)); \
111 } \
112 \
113 void start () \ 256 void start () \
114 { \ 257 { \
115 ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \ 258 ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
116 } \ 259 } \
117 \ 260 \
118 void stop () \ 261 void stop () \
119 { \ 262 { \
120 ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \ 263 ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
121 } \ 264 } \
122 \ 265 \
123 void operator ()(int events = EV_UNDEF) \
124 { \ 266 cppstem EV_CONSTRUCT \
125 return call (this, events); \
126 } \
127 \ 267 \
128 ~cppstem () \ 268 ~cppstem () \
129 { \ 269 { \
130 stop (); \ 270 stop (); \
131 } \ 271 } \
132 \ 272 \
273 using base<ev_ ## cstem, cppstem>::set; \
274 \
133 private: \ 275 private: \
134 \ 276 \
135 cppstem (const cppstem &o) \ 277 cppstem (const cppstem &o); \
136 : callback<cppstem> (this, (void (cppstem::*)(cppstem &, int))0) \
137 { /* disabled */ } \
138 \
139 void operator =(const cppstem &o) { /* disabled */ } \
140 \
141 static void thunk (EV_P_ struct ev_ ## cstem *w, int revents) \
142 { \ 278 \
143 (*static_cast<cppstem *>(w))(revents); \ 279 cppstem & operator =(const cppstem &o); \
144 } \
145 \ 280 \
146 public: 281 public:
147 282
148 #define EV_END_WATCHER(cppstem,cstem) \ 283 #define EV_END_WATCHER(cppstem,cstem) \
149 }; 284 };
… …
258 if (active) start (); 393 if (active) start ();
259 } 394 }
260 395
261 void start (const char *path, ev_tstamp interval = 0.) 396 void start (const char *path, ev_tstamp interval = 0.)
262 { 397 {
398 stop ();
263 set (path, interval); 399 set (path, interval);
264 start (); 400 start ();
265 } 401 }
266 402
267 void update () 403 void update ()
… …
283 void set () { } 419 void set () { }
284 EV_END_WATCHER (check, check) 420 EV_END_WATCHER (check, check)
285 421
286 #if EV_EMBED_ENABLE 422 #if EV_EMBED_ENABLE
287 EV_BEGIN_WATCHER (embed, embed) 423 EV_BEGIN_WATCHER (embed, embed)
288 void set (struct ev_loop *loop)
289 {
290 int active = is_active ();
291 if (active) stop ();
292 ev_embed_set (static_cast<ev_embed *>(this), loop);
293 if (active) start ();
294 }
295
296 void start (struct ev_loop *embedded_loop) 424 void start (struct ev_loop *embedded_loop)
297 { 425 {
298 set (embedded_loop); 426 stop ();
427 ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
299 start (); 428 start ();
300 } 429 }
301 430
302 void sweep () 431 void sweep ()
303 { 432 {
304 ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this)); 433 ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
305 } 434 }
306 EV_END_WATCHER (embed, embed) 435 EV_END_WATCHER (embed, embed)
436 #endif
437
438 #if EV_FORK_ENABLE
439 EV_BEGIN_WATCHER (fork, fork)
440 void set () { }
441 EV_END_WATCHER (fork, fork)
307 #endif 442 #endif
308 443
309 #undef EV_CONSTRUCT 444 #undef EV_CONSTRUCT
310 #undef EV_BEGIN_WATCHER 445 #undef EV_BEGIN_WATCHER
311 #undef EV_END_WATCHER 446 #undef EV_END_WATCHER

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines