2 * Copyright (c) 1995-1998, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.26 1998-02-11 11:53:35 adam
8 * Changed code so that it compiles as C++.
10 * Revision 1.25 1998/01/29 13:30:23 adam
11 * Better event handle system for NT/Unix.
13 * Revision 1.24 1997/09/04 14:19:13 adam
16 * Revision 1.23 1997/09/01 08:52:59 adam
17 * New windows NT/95 port using MSV5.0. The test server 'ztest' was
18 * moved a separate directory. MSV5.0 project server.dsp created.
19 * As an option, the server can now operate as an NT service.
21 * Revision 1.22 1996/07/06 19:58:35 quinn
22 * System headerfiles gathered in yconfig
24 * Revision 1.21 1996/02/21 12:55:51 quinn
27 * Revision 1.20 1996/02/21 12:52:55 quinn
30 * Revision 1.19 1995/12/05 11:17:30 quinn
31 * Moved some paranthesises around. Sigh.
33 * Revision 1.18 1995/11/13 09:27:41 quinn
34 * Fiddling with the variant stuff.
36 * Revision 1.17 1995/11/07 12:37:44 quinn
37 * Added support for forcing TIMEOUT event.
39 * Revision 1.16 1995/11/01 13:54:56 quinn
42 * Revision 1.15 1995/09/15 14:44:15 quinn
43 * *** empty log message ***
45 * Revision 1.14 1995/08/29 14:44:50 quinn
48 * Revision 1.13 1995/08/29 11:17:56 quinn
49 * Added code to receive close
51 * Revision 1.12 1995/08/29 10:41:18 quinn
54 * Revision 1.11 1995/06/19 12:39:09 quinn
55 * Fixed bug in timeout code. Added BER dumper.
57 * Revision 1.10 1995/06/16 10:31:33 quinn
58 * Added session timeout.
60 * Revision 1.9 1995/06/05 10:53:31 quinn
61 * Added a better SCAN.
63 * Revision 1.8 1995/05/16 08:51:01 quinn
64 * License, documentation, and memory fixes
66 * Revision 1.7 1995/03/27 15:02:01 quinn
67 * Added some includes for better portability
69 * Revision 1.6 1995/03/27 08:34:21 quinn
70 * Added dynamic server functionality.
71 * Released bindings to session.c (is now redundant)
73 * Revision 1.5 1995/03/15 08:37:41 quinn
74 * Now we're pretty much set for nonblocking I/O.
76 * Revision 1.4 1995/03/14 16:59:48 quinn
79 * Revision 1.3 1995/03/14 11:30:14 quinn
82 * Revision 1.2 1995/03/14 10:27:59 quinn
83 * More work on demo server.
85 * Revision 1.1 1995/03/10 18:22:44 quinn
86 * The rudiments of an asynchronous server.
103 #include <comstack.h>
107 #include <statserv.h>
109 IOCHAN iochan_create(int fd, IOC_CALLBACK cb, int flags)
113 if (!(new_iochan = (IOCHAN)xmalloc(sizeof(*new_iochan))))
115 new_iochan->destroyed = 0;
117 new_iochan->flags = flags;
118 new_iochan->fun = cb;
119 new_iochan->force_event = 0;
120 new_iochan->last_event = new_iochan->max_idle = 0;
121 new_iochan->next = NULL;
125 int event_loop(IOCHAN *iochans)
127 do /* loop as long as there are active associations to process */
130 fd_set in, out, except;
132 static struct timeval nullto = {0, 0}, to;
133 struct timeval *timeout;
138 timeout = &to; /* hang on select */
142 for (p = *iochans; p; p = p->next)
145 timeout = &nullto; /* polling select */
146 if (p->flags & EVENT_INPUT)
148 if (p->flags & EVENT_OUTPUT)
150 if (p->flags & EVENT_EXCEPT)
151 FD_SET(p->fd, &except);
155 if ((res = select(max + 1, &in, &out, &except, timeout)) < 0)
161 /* Destroy the first member in the chain, and try again */
162 association *assoc = (association *)iochan_getdata(*iochans);
163 COMSTACK conn = assoc->client_link;
166 destroy_association(assoc);
167 iochan_destroy(*iochans);
168 logf(LOG_DEBUG, "error while selecting, destroying iochan %p",
172 for (p = *iochans; p; p = p->next)
174 int force_event = p->force_event;
175 time_t now = time(0);
178 if (!p->destroyed && (FD_ISSET(p->fd, &in) ||
179 force_event == EVENT_INPUT))
182 (*p->fun)(p, EVENT_INPUT);
184 if (!p->destroyed && (FD_ISSET(p->fd, &out) ||
185 force_event == EVENT_OUTPUT))
188 (*p->fun)(p, EVENT_OUTPUT);
190 if (!p->destroyed && (FD_ISSET(p->fd, &except) ||
191 force_event == EVENT_EXCEPT))
194 (*p->fun)(p, EVENT_EXCEPT);
196 if (!p->destroyed && ((p->max_idle && now - p->last_event >
197 p->max_idle) || force_event == EVENT_TIMEOUT))
200 (*p->fun)(p, EVENT_TIMEOUT);
203 for (p = *iochans; p; p = nextp)
211 /* We need to inform the threadlist that this channel has been destroyed */
214 /* Now reset the pointers */
219 for (pr = *iochans; pr; pr = pr->next)
222 assert(pr); /* grave error if it weren't there */