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Comparing libev/ev++.h (file contents):
Revision 1.4 by root, Sun Nov 11 16:58:25 2007 UTC vs.
Revision 1.12 by root, Thu Nov 29 17:36:35 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
47 #include "ev.h"
48 33
49 enum { 34 enum {
50 UNDEF = EV_UNDEF, 35 UNDEF = EV_UNDEF,
51 NONE = EV_NONE, 36 NONE = EV_NONE,
52 READ = EV_READ, 37 READ = EV_READ,
53 WRITE = EV_WRITE, 38 WRITE = EV_WRITE,
54 TIMEOUT = EV_TIMEOUT, 39 TIMEOUT = EV_TIMEOUT,
55 PERIODIC = EV_PERIODIC, 40 PERIODIC = EV_PERIODIC,
56 SIGNAL = EV_SIGNAL, 41 SIGNAL = EV_SIGNAL,
42 CHILD = EV_CHILD,
43 STAT = EV_STAT,
57 IDLE = EV_IDLE, 44 IDLE = EV_IDLE,
58 CHECK = EV_CHECK, 45 CHECK = EV_CHECK,
59 PREPARE = EV_PREPARE, 46 PREPARE = EV_PREPARE,
60 CHILD = EV_CHILD, 47 FORK = EV_FORK,
48 EMBED = EV_EMBED,
61 ERROR = EV_ERROR, 49 ERROR = EV_ERROR,
62 }; 50 };
63 51
64 typedef ev_tstamp tstamp; 52 typedef ev_tstamp tstamp;
65 53
… …
93 81
94 /* using a template here would require quite a bit more lines, 82 /* using a template here would require quite a bit more lines,
95 * so a macro solution was chosen */ 83 * so a macro solution was chosen */
96 #define EV_BEGIN_WATCHER(cppstem,cstem) \ 84 #define EV_BEGIN_WATCHER(cppstem,cstem) \
97 \ 85 \
98 static void cb_ ## cppstem (struct ev_ ## cstem *w, int revents); \
99 \
100 struct cppstem : ev_ ## cstem, callback<cppstem> \ 86 struct cppstem : ev_ ## cstem, callback<cppstem> \
101 { \ 87 { \
102 EV_CONSTRUCT (cppstem) \ 88 EV_CONSTRUCT (cppstem) \
103 { \ 89 { \
104 ev_init (static_cast<ev_ ## cstem *>(this), cb_ ## cppstem); \ 90 ev_init (static_cast<ev_ ## cstem *>(this), thunk); \
105 } \ 91 } \
106 \ 92 \
107 bool is_active () const \ 93 bool is_active () const \
108 { \ 94 { \
109 return ev_is_active (static_cast<const ev_ ## cstem *>(this)); \ 95 return ev_is_active (static_cast<const ev_ ## cstem *>(this)); \
… …
137 private: \ 123 private: \
138 \ 124 \
139 cppstem (const cppstem &o) \ 125 cppstem (const cppstem &o) \
140 : callback<cppstem> (this, (void (cppstem::*)(cppstem &, int))0) \ 126 : callback<cppstem> (this, (void (cppstem::*)(cppstem &, int))0) \
141 { /* disabled */ } \ 127 { /* disabled */ } \
128 \
142 void operator =(const cppstem &o) { /* disabled */ } \ 129 void operator =(const cppstem &o) { /* disabled */ } \
143 \ 130 \
131 static void thunk (EV_P_ struct ev_ ## cstem *w, int revents) \
132 { \
133 (*static_cast<cppstem *>(w))(revents); \
134 } \
135 \
144 public: 136 public:
145 137
146 #define EV_END_WATCHER(cppstem,cstem) \ 138 #define EV_END_WATCHER(cppstem,cstem) \
147 }; \
148 \
149 static void cb_ ## cppstem (struct ev_ ## cstem *w, int revents) \
150 { \
151 (*static_cast<cppstem *>(w))(revents); \
152 } 139 };
153 140
154 EV_BEGIN_WATCHER (io, io) 141 EV_BEGIN_WATCHER (io, io)
155 void set (int fd, int events) 142 void set (int fd, int events)
156 { 143 {
157 int active = is_active (); 144 int active = is_active ();
… …
194 { 181 {
195 ev_timer_again (EV_A_ static_cast<ev_timer *>(this)); 182 ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
196 } 183 }
197 EV_END_WATCHER (timer, timer) 184 EV_END_WATCHER (timer, timer)
198 185
199 #if EV_PERIODICS 186 #if EV_PERIODIC_ENABLE
200 EV_BEGIN_WATCHER (periodic, periodic) 187 EV_BEGIN_WATCHER (periodic, periodic)
201 void set (ev_tstamp at, ev_tstamp interval = 0.) 188 void set (ev_tstamp at, ev_tstamp interval = 0.)
202 { 189 {
203 int active = is_active (); 190 int active = is_active ();
204 if (active) stop (); 191 if (active) stop ();
… …
217 ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this)); 204 ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
218 } 205 }
219 EV_END_WATCHER (periodic, periodic) 206 EV_END_WATCHER (periodic, periodic)
220 #endif 207 #endif
221 208
222 EV_BEGIN_WATCHER (idle, idle)
223 EV_END_WATCHER (idle, idle)
224
225 EV_BEGIN_WATCHER (prepare, prepare)
226 EV_END_WATCHER (prepare, prepare)
227
228 EV_BEGIN_WATCHER (check, check)
229 EV_END_WATCHER (check, check)
230
231 EV_BEGIN_WATCHER (sig, signal) 209 EV_BEGIN_WATCHER (sig, signal)
232 void set (int signum) 210 void set (int signum)
233 { 211 {
234 int active = is_active (); 212 int active = is_active ();
235 if (active) stop (); 213 if (active) stop ();
… …
258 set (pid); 236 set (pid);
259 start (); 237 start ();
260 } 238 }
261 EV_END_WATCHER (child, child) 239 EV_END_WATCHER (child, child)
262 240
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 stop ();
254 set (path, interval);
255 start ();
256 }
257
258 void update ()
259 {
260 ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
261 }
262 EV_END_WATCHER (stat, stat)
263 #endif
264
265 EV_BEGIN_WATCHER (idle, idle)
266 void set () { }
267 EV_END_WATCHER (idle, idle)
268
269 EV_BEGIN_WATCHER (prepare, prepare)
270 void set () { }
271 EV_END_WATCHER (prepare, prepare)
272
273 EV_BEGIN_WATCHER (check, check)
274 void set () { }
275 EV_END_WATCHER (check, check)
276
277 #if EV_EMBED_ENABLE
278 EV_BEGIN_WATCHER (embed, embed)
279 void start (struct ev_loop *embedded_loop)
280 {
281 stop ();
282 ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
283 start ();
284 }
285
286 void sweep ()
287 {
288 ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
289 }
290 EV_END_WATCHER (embed, embed)
291 #endif
292
293 #if EV_FORK_ENABLE
294 EV_BEGIN_WATCHER (fork, fork)
295 void set () { }
296 EV_END_WATCHER (fork, fork)
297 #endif
298
263 #undef EV_CONSTRUCT 299 #undef EV_CONSTRUCT
264 #undef EV_BEGIN_WATCHER 300 #undef EV_BEGIN_WATCHER
301 #undef EV_END_WATCHER
265} 302}
266 303
267#endif 304#endif
268 305

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