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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 1.11 by root, Tue Nov 27 22:31:52 2007 UTC

1#ifndef EVPP_H__ 1#ifndef EVPP_H__
2#define EVPP_H__ 2#define EVPP_H__
3 3
4/* work in progress, don't use unless you know what you are doing */ 4#include "ev.h"
5 5
6namespace ev { 6namespace ev {
7 7
8 template<class watcher> 8 template<class watcher>
9 class callback 9 class callback
10 { 10 {
11 struct object { }; 11 struct klass; // it is vital that this is never defined
12 12
13 void *obj; 13 klass *o;
14 void (object::*meth)(watcher &, int); 14 void (klass::*m)(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 15
31 public: 16 public:
32 template<class O1, class O2> 17 template<class O1, class O2>
33 explicit callback (O1 *object, void (O2::*method)(watcher &, int)) 18 explicit callback (O1 *object, void (O2::*method)(watcher &, int))
34 { 19 {
35 static proxy<O1,O2> p;
36 obj = reinterpret_cast<void *>(object); 20 o = reinterpret_cast<klass *>(object);
37 meth = reinterpret_cast<void (object::*)(watcher &, int)>(method); 21 m = reinterpret_cast<void (klass::*)(watcher &, int)>(method);
38 prxy = &p;
39 } 22 }
40 23
24 // this works because a standards-compliant C++ compiler
25 // basically can't help it: it doesn't have the knowledge
26 // required to miscompile (klass is not defined anywhere
27 // and nothing is known about the constructor arguments) :)
41 void call (watcher *w, int e) const 28 void call (watcher *w, int revents)
42 { 29 {
43 return prxy->call (obj, meth, *w, e); 30 (o->*m) (*w, revents);
44 } 31 }
45 }; 32 };
46 33
47 #include "ev.h" 34 enum {
35 UNDEF = EV_UNDEF,
36 NONE = EV_NONE,
37 READ = EV_READ,
38 WRITE = EV_WRITE,
39 TIMEOUT = EV_TIMEOUT,
40 PERIODIC = EV_PERIODIC,
41 SIGNAL = EV_SIGNAL,
42 CHILD = EV_CHILD,
43 STAT = EV_STAT,
44 IDLE = EV_IDLE,
45 CHECK = EV_CHECK,
46 PREPARE = EV_PREPARE,
47 FORK = EV_FORK,
48 EMBED = EV_EMBED,
49 ERROR = EV_ERROR,
50 };
48 51
49 typedef ev_tstamp tstamp; 52 typedef ev_tstamp tstamp;
50 53
51 inline ev_tstamp now (EV_P) 54 inline ev_tstamp now (EV_P)
52 { 55 {
… …
76 79
77 #endif 80 #endif
78 81
79 /* using a template here would require quite a bit more lines, 82 /* using a template here would require quite a bit more lines,
80 * so a macro solution was chosen */ 83 * so a macro solution was chosen */
81 #define EV_DECLARE_WATCHER(cppstem,cstem) \ 84 #define EV_BEGIN_WATCHER(cppstem,cstem) \
82 \
83 extern "C" void cb_ ## cppstem (struct ev_ ## cstem *w, int revents); \
84 \ 85 \
85 struct cppstem : ev_ ## cstem, callback<cppstem> \ 86 struct cppstem : ev_ ## cstem, callback<cppstem> \
86 { \ 87 { \
87 EV_CONSTRUCT (cppstem) \ 88 EV_CONSTRUCT (cppstem) \
88 { \ 89 { \
89 ev_init (static_cast<ev_ ## cstem *>(this), cb_ ## cppstem); \ 90 ev_init (static_cast<ev_ ## cstem *>(this), thunk); \
90 } \ 91 } \
91 \ 92 \
92 bool is_active () const \ 93 bool is_active () const \
93 { \ 94 { \
94 return ev_is_active (static_cast<const ev_ ## cstem *>(this)); \ 95 return ev_is_active (static_cast<const ev_ ## cstem *>(this)); \
… …
110 } \ 111 } \
111 \ 112 \
112 void operator ()(int events = EV_UNDEF) \ 113 void operator ()(int events = EV_UNDEF) \
113 { \ 114 { \
114 return call (this, events); \ 115 return call (this, events); \
116 } \
117 \
118 ~cppstem () \
119 { \
120 stop (); \
115 } \ 121 } \
116 \ 122 \
117 private: \ 123 private: \
118 \ 124 \
119 cppstem (const cppstem &o) \ 125 cppstem (const cppstem &o) \
120 : callback<cppstem> (this, (void (cppstem::*)(cppstem &, int))0) \ 126 : callback<cppstem> (this, (void (cppstem::*)(cppstem &, int))0) \
121 { /* disabled */ } \ 127 { /* disabled */ } \
128 \
122 void operator =(const cppstem &o) { /* disabled */ } \ 129 void operator =(const cppstem &o) { /* disabled */ } \
123 \ 130 \
131 static void thunk (EV_P_ struct ev_ ## cstem *w, int revents) \
132 { \
133 (*static_cast<cppstem *>(w))(revents); \
134 } \
135 \
124 public: 136 public:
125 137
138 #define EV_END_WATCHER(cppstem,cstem) \
139 };
140
126 EV_DECLARE_WATCHER (io, io) 141 EV_BEGIN_WATCHER (io, io)
127 void set (int fd, int events) 142 void set (int fd, int events)
128 { 143 {
129 int active = is_active (); 144 int active = is_active ();
130 if (active) stop (); 145 if (active) stop ();
131 ev_io_set (static_cast<ev_io *>(this), fd, events); 146 ev_io_set (static_cast<ev_io *>(this), fd, events);
… …
143 void start (int fd, int events) 158 void start (int fd, int events)
144 { 159 {
145 set (fd, events); 160 set (fd, events);
146 start (); 161 start ();
147 } 162 }
148 }; 163 EV_END_WATCHER (io, io)
149 164
150 EV_DECLARE_WATCHER (timer, timer) 165 EV_BEGIN_WATCHER (timer, timer)
151 void set (ev_tstamp after, ev_tstamp repeat = 0.) 166 void set (ev_tstamp after, ev_tstamp repeat = 0.)
152 { 167 {
153 int active = is_active (); 168 int active = is_active ();
154 if (active) stop (); 169 if (active) stop ();
155 ev_timer_set (static_cast<ev_timer *>(this), after, repeat); 170 ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
… …
164 179
165 void again () 180 void again ()
166 { 181 {
167 ev_timer_again (EV_A_ static_cast<ev_timer *>(this)); 182 ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
168 } 183 }
169 }; 184 EV_END_WATCHER (timer, timer)
170 185
186 #if EV_PERIODIC_ENABLE
171 EV_DECLARE_WATCHER (periodic, periodic) 187 EV_BEGIN_WATCHER (periodic, periodic)
172 void set (ev_tstamp at, ev_tstamp interval = 0.) 188 void set (ev_tstamp at, ev_tstamp interval = 0.)
173 { 189 {
174 int active = is_active (); 190 int active = is_active ();
175 if (active) stop (); 191 if (active) stop ();
176 ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0); 192 ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
… …
185 201
186 void again () 202 void again ()
187 { 203 {
188 ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this)); 204 ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
189 } 205 }
190 }; 206 EV_END_WATCHER (periodic, periodic)
207 #endif
191 208
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) 209 EV_BEGIN_WATCHER (sig, signal)
202 void set (int signum) 210 void set (int signum)
203 { 211 {
204 int active = is_active (); 212 int active = is_active ();
205 if (active) stop (); 213 if (active) stop ();
206 ev_signal_set (static_cast<ev_signal *>(this), signum); 214 ev_signal_set (static_cast<ev_signal *>(this), signum);
… …
210 void start (int signum) 218 void start (int signum)
211 { 219 {
212 set (signum); 220 set (signum);
213 start (); 221 start ();
214 } 222 }
215 }; 223 EV_END_WATCHER (sig, signal)
216 224
217 EV_DECLARE_WATCHER (child, child) 225 EV_BEGIN_WATCHER (child, child)
218 void set (int pid) 226 void set (int pid)
219 { 227 {
220 int active = is_active (); 228 int active = is_active ();
221 if (active) stop (); 229 if (active) stop ();
222 ev_child_set (static_cast<ev_child *>(this), pid); 230 ev_child_set (static_cast<ev_child *>(this), pid);
… …
226 void start (int pid) 234 void start (int pid)
227 { 235 {
228 set (pid); 236 set (pid);
229 start (); 237 start ();
230 } 238 }
231 }; 239 EV_END_WATCHER (child, child)
240
241 #if EV_STAT_ENABLE
242 EV_BEGIN_WATCHER (stat, stat)
243 void set (const char *path, ev_tstamp interval = 0.)
244 {
245 int active = is_active ();
246 if (active) stop ();
247 ev_stat_set (static_cast<ev_stat *>(this), path, interval);
248 if (active) start ();
249 }
250
251 void start (const char *path, ev_tstamp interval = 0.)
252 {
253 set (path, interval);
254 start ();
255 }
256
257 void update ()
258 {
259 ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
260 }
261 EV_END_WATCHER (stat, stat)
262 #endif
263
264 EV_BEGIN_WATCHER (idle, idle)
265 void set () { }
266 EV_END_WATCHER (idle, idle)
267
268 EV_BEGIN_WATCHER (prepare, prepare)
269 void set () { }
270 EV_END_WATCHER (prepare, prepare)
271
272 EV_BEGIN_WATCHER (check, check)
273 void set () { }
274 EV_END_WATCHER (check, check)
275
276 #if EV_EMBED_ENABLE
277 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)
287 {
288 set (embedded_loop);
289 start ();
290 }
291
292 void sweep ()
293 {
294 ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
295 }
296 EV_END_WATCHER (embed, embed)
297 #endif
298
299 #if EV_FORK_ENABLE
300 EV_BEGIN_WATCHER (fork, fork)
301 void set () { }
302 EV_END_WATCHER (fork, fork)
303 #endif
232 304
233 #undef EV_CONSTRUCT 305 #undef EV_CONSTRUCT
306 #undef EV_BEGIN_WATCHER
234 #undef EV_DECLARE_WATCHER 307 #undef EV_END_WATCHER
235} 308}
236 309
237#endif 310#endif
238 311

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