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Comparing rxvt-unicode/src/iom.C (file contents):
Revision 1.3 by pcg, Tue Nov 25 17:11:33 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
38template<class watcher>
39void io_manager::reg (watcher *w, simplevec<watcher *> &queue)
40{
41 if (!iom_valid)
42 abort ();
43
44 if (!w->active)
45 {
46 queue.push_back (w);
47 w->active = queue.size ();
48 }
49}
50
51template<class watcher>
52void io_manager::unreg (watcher *w, simplevec<watcher *> &queue)
53{
54 if (!iom_valid)
55 return;
56
57 if (w->active)
58 {
59 queue [w->active - 1] = 0;
60 w->active = 0;
61 }
62}
63
64#if IOM_TIME
33void time_watcher::trigger () 65void time_watcher::trigger ()
34{ 66{
35 call (*this); 67 call (*this);
36 68
37 iom.reg (this); 69 iom.reg (this);
38} 70}
39 71
40time_watcher::~time_watcher ()
41{
42 if (iom_valid)
43 iom.unreg (this);
44
45 at = TSTAMP_CANCEL;
46}
47
48io_watcher::~io_watcher ()
49{
50 if (iom_valid)
51 iom.unreg (this);
52}
53
54void io_manager::reg (io_watcher *w)
55{
56 if (find (iow.begin (), iow.end (), w) == iow.end ())
57 iow.push_back (w);
58}
59
60void io_manager::unreg (io_watcher *w)
61{
62 iow.erase (find (iow.begin (), iow.end (), w));
63}
64
65void io_manager::reg (time_watcher *w) 72void io_manager::reg (time_watcher *w) { reg (w, tw); }
66{
67 if (find (tw.begin (), tw.end (), w) == tw.end ())
68 tw.push_back (w);
69}
70
71void io_manager::unreg (time_watcher *w) 73void io_manager::unreg (time_watcher *w) { unreg (w, tw); }
72{ 74#endif
73 tw.erase (find (tw.begin (), tw.end (), w));
74}
75 75
76#if IOM_IO
77void io_manager::reg (io_watcher *w) { reg (w, iow); }
78void io_manager::unreg (io_watcher *w) { unreg (w, iow); }
79#endif
80
81#if IOM_CHECK
82void io_manager::reg (check_watcher *w) { reg (w, cw); }
83void io_manager::unreg (check_watcher *w) { unreg (w, cw); }
84#endif
85
86#if IOM_IDLE
87void io_manager::reg (idle_watcher *w) { reg (w, iw); }
88void io_manager::unreg (idle_watcher *w) { unreg (w, iw); }
89#endif
90
91#if IOM_TIME
76inline void set_now (void) 92inline void set_now (void)
77{ 93{
78 struct timeval tv; 94 struct timeval tv;
79 95
80 gettimeofday (&tv, 0); 96 gettimeofday (&tv, 0);
81 97
82 NOW = (tstamp)tv.tv_sec + (tstamp)tv.tv_usec / 1000000; 98 NOW = (tstamp)tv.tv_sec + (tstamp)tv.tv_usec / 1000000;
99#endif
83} 100}
84 101
85void io_manager::loop () 102void io_manager::loop ()
86{ 103{
104#if IOM_TIME
87 set_now (); 105 set_now ();
106#endif
88 107
89 for (;;) 108 for (;;)
90 { 109 {
91 time_watcher *w; 110 struct timeval *to = 0;
111 struct timeval tval;
92 112
93 for (;;) 113#if IOM_IDLE
114 if (iw.size ())
94 { 115 {
95 w = tw[0]; 116 tval.tv_sec = 0;
96 117 tval.tv_usec = 0;
97 for (time_watcher **i = tw.begin (); i != tw.end (); ++i) 118 to = &tval;
98 if ((*i)->at < w->at)
99 w = *i;
100
101 if (w->at > NOW)
102 break;
103
104 // call it
105 w->call (*w);
106
107 if (w->at < 0)
108 unreg (w);
109 } 119 }
120 else
121#endif
122 {
123#if IOM_TIME
124 time_watcher *next;
110 125
111 struct timeval to; 126 for (;;)
112 double diff = w->at - NOW; 127 {
113 to.tv_sec = (int)diff; 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;
114 to.tv_usec = (int)((diff - to.tv_sec) * 1000000); 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 }
115 155
156#if IOM_CHECK
157 for (int i = cw.size (); i--; )
158 if (!cw[i])
159 cw.erase_unordered (i);
160 else
161 cw[i]->call (*cw[i]);
162#endif
163
164#if IOM_IO
116 fd_set rfd, wfd; 165 fd_set rfd, wfd, efd;
117 166
118 FD_ZERO (&rfd); 167 FD_ZERO (&rfd);
119 FD_ZERO (&wfd); 168 FD_ZERO (&wfd);
120 169
121 int fds = 0; 170 int fds = 0;
122 171
123 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)
124 { 204 {
125 if ((*w)->events & EVENT_READ ) FD_SET ((*w)->fd, &rfd); 205 perror ("Error while waiting for I/O or time event");
126 if ((*w)->events & EVENT_WRITE) FD_SET ((*w)->fd, &wfd); 206 abort ();
127
128 if ((*w)->fd > fds) fds = (*w)->fd;
129 } 207 }
208#if IOM_IDLE
209 else
210 for (int i = iw.size (); i--; )
211 if (!iw[i])
212 iw.erase_unordered (i);
213 else
214 iw[i]->call (*iw[i]);
215#endif
130 216
131 fds = select (fds + 1, &rfd, &wfd, 0, &to); 217#elif IOM_TIME
218 if (!to)
219 break;
132 220
221 select (0, 0, 0, 0, &to);
133 set_now (); 222 set_now ();
134 223#else
135 if (fds > 0) 224 break;
136 for (io_watcher **w = iow.begin (); w < iow.end (); ++w) 225#endif
137 {
138 short revents = (*w)->events;
139
140 if (!FD_ISSET ((*w)->fd, &rfd)) revents &= ~EVENT_READ;
141 if (!FD_ISSET ((*w)->fd, &wfd)) revents &= ~EVENT_WRITE;
142
143 if (revents)
144 (*w)->call (**w, revents);
145 }
146 } 226 }
147} 227}
148 228
149void io_manager::idle_cb (time_watcher &w) 229// this is a dummy time watcher to ensure that the first
150{ 230// time watcher is _always_ valid, this gets rid of a lot
151 w.at = NOW + 1000000000; 231// of null-pointer-checks
152} 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;
153 244
154io_manager::io_manager () 245io_manager::io_manager ()
155{ 246{
247 iom_valid = true;
248
249#if IOM_TIME
156 set_now (); 250 set_now ();
157 251
158 iom_valid = true; 252 tw0.start (TSTAMP_MAX);
159 253#endif
160 idle = new time_watcher (this, &io_manager::idle_cb);
161 idle->start (0);
162} 254}
163 255
164io_manager::~io_manager () 256io_manager::~io_manager ()
165{ 257{
166 iom_valid = false; 258 iom_valid = false;

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