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Comparing rxvt-unicode/src/iom.C (file contents):
Revision 1.4 by pcg, Wed Nov 26 10:42:34 2003 UTC vs.
Revision 1.8 by pcg, Fri Jan 16 22:11:09 2004 UTC

… …
18*/ 18*/
19 19
20#include "../config.h" 20#include "../config.h"
21 21
22#include <cstdio> 22#include <cstdio>
23#include <cstdlib>
24#include <cerrno>
23 25
24#include <sys/select.h> 26#include <sys/select.h>
25#include <sys/time.h> 27#include <sys/time.h>
26 28
27#include "iom.h" 29#include "iom.h"
28 30
31// TSTAMP_MAX must still fit into a positive struct timeval
32#define TSTAMP_MAX (double)(1UL<<31)
33
29tstamp NOW; 34tstamp NOW;
30bool iom_valid; 35static bool iom_valid;
31io_manager iom; 36io_manager iom;
32 37
33template<class watcher> 38template<class watcher>
34void io_manager::reg (watcher *w, simplevec<watcher *> &queue) 39void io_manager::reg (watcher *w, simplevec<watcher *> &queue)
35{ 40{
36 if (find (queue.begin (), queue.end (), w) == queue.end ()) 41 if (!iom_valid)
42 abort ();
43
44 if (!w->active)
45 {
37 queue.push_back (w); 46 queue.push_back (w);
47 w->active = queue.size ();
48 }
38} 49}
39 50
40template<class watcher> 51template<class watcher>
41void io_manager::unreg (watcher *w, simplevec<watcher *> &queue) 52void io_manager::unreg (watcher *w, simplevec<watcher *> &queue)
42{ 53{
43 queue.erase (find (queue.begin (), queue.end (), w)); 54 if (!iom_valid)
55 return;
56
57 if (w->active)
58 {
59 queue [w->active - 1] = 0;
60 w->active = 0;
61 }
44} 62}
63
64#if IOM_TIME
65void time_watcher::trigger ()
66{
67 call (*this);
68
69 iom.reg (this);
70}
71
72void io_manager::reg (time_watcher *w) { reg (w, tw); }
73void io_manager::unreg (time_watcher *w) { unreg (w, tw); }
74#endif
45 75
46#if IOM_IO 76#if IOM_IO
47io_watcher::~io_watcher ()
48{
49 if (iom_valid)
50 iom.unreg (this);
51}
52
53void io_manager::reg (io_watcher *w) 77void io_manager::reg (io_watcher *w) { reg (w, iow); }
54{
55 reg (w, iow);
56}
57
58void io_manager::unreg (io_watcher *w) 78void io_manager::unreg (io_watcher *w) { unreg (w, iow); }
59{
60 unreg (w, iow);
61}
62
63#endif
64
65#if IOM_TIME
66void time_watcher::trigger ()
67{
68 call (*this);
69
70 iom.reg (this);
71}
72
73time_watcher::~time_watcher ()
74{
75 if (iom_valid)
76 iom.unreg (this);
77
78 at = TSTAMP_CANCEL;
79}
80
81void io_manager::reg (time_watcher *w)
82{
83 reg (w, tw);
84}
85
86void io_manager::unreg (time_watcher *w)
87{
88 unreg (w, tw);
89}
90#endif 79#endif
91 80
92#if IOM_CHECK 81#if IOM_CHECK
93check_watcher::~check_watcher ()
94{
95 if (iom_valid)
96 iom.unreg (this);
97}
98
99void io_manager::reg (check_watcher *w) 82void io_manager::reg (check_watcher *w) { reg (w, cw); }
100{
101 reg (w, cw);
102}
103
104void io_manager::unreg (check_watcher *w) 83void io_manager::unreg (check_watcher *w) { unreg (w, cw); }
105{ 84#endif
106 unreg (w, cw); 85
107} 86#if IOM_IDLE
87void io_manager::reg (idle_watcher *w) { reg (w, iw); }
88void io_manager::unreg (idle_watcher *w) { unreg (w, iw); }
108#endif 89#endif
109 90
110#if IOM_TIME 91#if IOM_TIME
111inline void set_now (void) 92inline void set_now (void)
112{ 93{
… …
124 set_now (); 105 set_now ();
125#endif 106#endif
126 107
127 for (;;) 108 for (;;)
128 { 109 {
110 struct timeval *to = 0;
111 struct timeval tval;
112
113#if IOM_IDLE
114 if (iw.size ())
115 {
116 tval.tv_sec = 0;
117 tval.tv_usec = 0;
118 to = &tval;
119 }
120 else
121#endif
122 {
123#if IOM_TIME
124 time_watcher *next;
125
126 for (;;)
127 {
128 next = tw[0]; // the first time-watcher must exist at ALL times
129
130 for (int i = tw.size (); i--; )
131 if (!tw[i])
132 tw.erase_unordered (i);
133 else if (tw[i]->at < next->at)
134 next = tw[i];
135
136 if (next->at > NOW)
137 {
138 if (next != tw[0])
139 {
140 double diff = next->at - NOW;
141 tval.tv_sec = (int)diff;
142 tval.tv_usec = (int)((diff - tval.tv_sec) * 1000000);
143 to = &tval;
144 }
145 break;
146 }
147 else if (next->at >= 0)
148 {
149 unreg (next);
150 next->call (*next);
151 }
152 }
153#endif
154 }
155
129#if IOM_CHECK 156#if IOM_CHECK
130 for (int i = 0; i < cw.size (); ++i) 157 for (int i = cw.size (); i--; )
158 if (!cw[i])
159 cw.erase_unordered (i);
160 else
131 cw[i]->call (*cw[i]); 161 cw[i]->call (*cw[i]);
132#endif
133
134#if IOM_TIME
135 time_watcher *w;
136
137 for (;;)
138 {
139 w = tw[0];
140
141 for (time_watcher **i = tw.begin (); i < tw.end (); ++i)
142 if ((*i)->at < w->at)
143 w = *i;
144
145 if (w->at > NOW)
146 break;
147
148 // call it
149 w->call (*w);
150
151 if (w->at < 0)
152 unreg (w);
153 }
154
155 double diff = w->at - NOW;
156 struct timeval to;
157 to.tv_sec = (int)diff;
158 to.tv_usec = (int)((diff - to.tv_sec) * 1000000);
159#endif 162#endif
160 163
161#if IOM_IO 164#if IOM_IO
162 fd_set rfd, wfd; 165 fd_set rfd, wfd, efd;
163 166
164 FD_ZERO (&rfd); 167 FD_ZERO (&rfd);
165 FD_ZERO (&wfd); 168 FD_ZERO (&wfd);
166 169
167 int fds = 0; 170 int fds = 0;
168 171
169 for (io_watcher **w = iow.begin (); w < iow.end (); ++w) 172 for (io_watcher **i = iow.end (); i-- > iow.begin (); )
173 if (*i)
174 {
175 if ((*i)->events & EVENT_READ ) FD_SET ((*i)->fd, &rfd);
176 if ((*i)->events & EVENT_WRITE) FD_SET ((*i)->fd, &wfd);
177
178 if ((*i)->fd >= fds) fds = (*i)->fd + 1;
179 }
180
181 if (!to && !fds) //TODO: also check idle_watchers and check_watchers
182 break; // no events
183
184 fds = select (fds, &rfd, &wfd, &efd, to);
185# if IOM_TIME
186 set_now ();
187# endif
188
189 if (fds > 0)
190 for (int i = iow.size (); i--; )
191 if (!iow[i])
192 iow.erase_unordered (i);
193 else
194 {
195 short revents = iow[i]->events;
196
197 if (!FD_ISSET (iow[i]->fd, &rfd)) revents &= ~EVENT_READ;
198 if (!FD_ISSET (iow[i]->fd, &wfd)) revents &= ~EVENT_WRITE;
199
200 if (revents)
201 iow[i]->call (*iow[i], revents);
202 }
203 else if (fds < 0 && errno != EINTR)
170 { 204 {
171 if ((*w)->events & EVENT_READ ) FD_SET ((*w)->fd, &rfd); 205 perror ("Error while waiting for I/O or time event");
172 if ((*w)->events & EVENT_WRITE) FD_SET ((*w)->fd, &wfd); 206 abort ();
173
174 if ((*w)->fd > fds) fds = (*w)->fd;
175 } 207 }
176
177# if IOM_TIME 208#if IOM_IDLE
178 fds = select (fds + 1, &rfd, &wfd, 0, &to); 209 else
179 set_now (); 210 for (int i = iw.size (); i--; )
180# else 211 if (!iw[i])
181 fds = select (fds + 1, &rfd, &wfd, 0, 0); 212 iw.erase_unordered (i);
213 else
214 iw[i]->call (*iw[i]);
182# endif 215#endif
183 216
184 if (fds > 0)
185 for (int i = 0; i < iow.size (); ++i)
186 {
187 io_watcher *w = iow[i];
188
189 short revents = w->events;
190
191 if (!FD_ISSET (w->fd, &rfd)) revents &= ~EVENT_READ;
192 if (!FD_ISSET (w->fd, &wfd)) revents &= ~EVENT_WRITE;
193
194 if (revents)
195 w->call (*w, revents);
196 }
197 }
198#elif IOM_TIME 217#elif IOM_TIME
218 if (!to)
219 break;
220
199 select (0, 0, 0, 0, &to); 221 select (0, 0, 0, 0, &to);
200 set_now (); 222 set_now ();
223#else
224 break;
201#endif 225#endif
226 }
202} 227}
203 228
204void io_manager::idle_cb (time_watcher &w) 229// this is a dummy time watcher to ensure that the first
205{ 230// time watcher is _always_ valid, this gets rid of a lot
206 w.at = NOW + 1000000000; 231// of null-pointer-checks
207} 232static struct tw0 : time_watcher {
233 void cb (time_watcher &w)
234 {
235 // should never get called
236 // reached end-of-time, or tstamp has a bogus definition :)
237 abort ();
238 }
239
240 tw0()
241 : time_watcher (this, &tw0::cb)
242 { }
243} tw0;
208 244
209io_manager::io_manager () 245io_manager::io_manager ()
210{ 246{
247 iom_valid = true;
248
249#if IOM_TIME
211 set_now (); 250 set_now ();
212 251
213 iom_valid = true; 252 tw0.start (TSTAMP_MAX);
214
215#if IOM_TIME
216 idle = new time_watcher (this, &io_manager::idle_cb);
217 idle->start (0);
218#endif 253#endif
219} 254}
220 255
221io_manager::~io_manager () 256io_manager::~io_manager ()
222{ 257{

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