1 /* This file is part of Pazpar2.
2 Copyright (C) 2006-2010 Index Data
4 Pazpar2 is free software; you can redistribute it and/or modify it under
5 the terms of the GNU General Public License as published by the Free
6 Software Foundation; either version 2, or (at your option) any later
9 Pazpar2 is distributed in the hope that it will be useful, but WITHOUT ANY
10 WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 * Based on ParaZ - a simple tool for harvesting performance data for
22 * parallel operations using Z39.50.
23 * Copyright (C) 2006-2010 Index Data ApS
24 * See LICENSE file for details.
28 * Based on revision YAZ' server/eventl.c 1.29.
51 #include <yaz/yconfig.h>
53 #include <yaz/comstack.h>
54 #include <yaz/xmalloc.h>
56 #include "sel_thread.h"
60 sel_thread_t sel_thread;
66 iochan_man_t iochan_man_create(int no_threads)
68 iochan_man_t man = xmalloc(sizeof(*man));
69 man->channel_list = 0;
70 man->sel_thread = 0; /* can't create sel_thread yet because we may fork */
72 man->no_threads = no_threads;
73 man->log_level = yaz_log_module_level("iochan");
78 void iochan_man_destroy(iochan_man_t *mp)
83 if ((*mp)->sel_thread)
84 sel_thread_destroy((*mp)->sel_thread);
86 c = (*mp)->channel_list;
89 IOCHAN c_next = c->next;
99 void iochan_add(iochan_man_t man, IOCHAN chan)
102 chan->next = man->channel_list;
103 man->channel_list = chan;
106 IOCHAN iochan_create(int fd, IOC_CALLBACK cb, int flags,
111 if (!(new_iochan = (IOCHAN)xmalloc(sizeof(*new_iochan))))
113 new_iochan->destroyed = 0;
115 new_iochan->flags = flags;
116 new_iochan->fun = cb;
117 new_iochan->socketfun = NULL;
118 new_iochan->maskfun = NULL;
119 new_iochan->force_event = 0;
120 new_iochan->last_event = new_iochan->max_idle = 0;
121 new_iochan->next = NULL;
123 new_iochan->thread_users = 0;
124 new_iochan->name = name ? xstrdup(name) : 0;
128 static void work_handler(void *work_data)
130 IOCHAN p = work_data;
132 yaz_log(p->man->log_level, "eventl: work begin chan=%p name=%s event=%d",
133 p, p->name ? p->name : "", p->this_event);
135 if (!p->destroyed && (p->this_event & EVENT_TIMEOUT))
136 (*p->fun)(p, EVENT_TIMEOUT);
137 if (!p->destroyed && (p->this_event & EVENT_INPUT))
138 (*p->fun)(p, EVENT_INPUT);
139 if (!p->destroyed && (p->this_event & EVENT_OUTPUT))
140 (*p->fun)(p, EVENT_OUTPUT);
141 if (!p->destroyed && (p->this_event & EVENT_EXCEPT))
142 (*p->fun)(p, EVENT_EXCEPT);
144 yaz_log(p->man->log_level, "eventl: work end chan=%p name=%s event=%d",
145 p, p->name ? p->name : "", p->this_event);
148 static void run_fun(iochan_man_t man, IOCHAN p)
154 yaz_log(man->log_level, "eventl: work add chan=%p name=%s event=%d",
155 p, p->name ? p->name : "", p->this_event);
157 sel_thread_add(man->sel_thread, p);
164 static int event_loop(iochan_man_t man, IOCHAN *iochans)
166 do /* loop as long as there are active associations to process */
169 fd_set in, out, except;
171 static struct timeval nullto = {0, 0}, to;
172 struct timeval *timeout;
177 timeout = &to; /* hang on select */
181 for (p = *iochans; p; p = p->next)
183 if (p->thread_users > 0)
186 p->flags = (*p->maskfun)(p);
188 p->fd = (*p->socketfun)(p);
189 if (p->max_idle && p->max_idle < to.tv_sec)
190 to.tv_sec = p->max_idle;
194 timeout = &nullto; /* polling select */
195 if (p->flags & EVENT_INPUT)
197 if (p->flags & EVENT_OUTPUT)
199 if (p->flags & EVENT_EXCEPT)
200 FD_SET(p->fd, &except);
204 if (man->sel_fd != -1)
206 if (man->sel_fd > max)
208 FD_SET(man->sel_fd, &in);
210 yaz_log(man->log_level, "select begin nofds=%d", max);
211 res = select(max + 1, &in, &out, &except, timeout);
212 yaz_log(man->log_level, "select returned res=%d", res);
219 yaz_log(YLOG_ERRNO|YLOG_WARN, "select");
223 if (man->sel_fd != -1)
225 if (FD_ISSET(man->sel_fd, &in))
229 yaz_log(man->log_level, "eventl: sel input on sel_fd=%d",
231 while ((chan = sel_thread_result(man->sel_thread)))
233 yaz_log(man->log_level, "eventl: got thread result chan=%p name=%s",
234 chan, chan->name ? chan->name : "");
235 chan->thread_users--;
239 for (p = *iochans; p; p = p->next)
241 int force_event = p->force_event;
242 time_t now = time(0);
246 yaz_log(man->log_level, "eventl: skip destroyed chan=%p name=%s", p, p->name ? p->name : "");
249 if (p->thread_users > 0)
251 yaz_log(man->log_level, "eventl: skip chan=%p name=%s users=%d", p, p->name ? p->name : "", p->thread_users);
257 if ((p->max_idle && now - p->last_event > p->max_idle)
258 || force_event == EVENT_TIMEOUT)
261 p->this_event |= EVENT_TIMEOUT;
265 if (FD_ISSET(p->fd, &in) || force_event == EVENT_INPUT)
268 yaz_log(YLOG_DEBUG, "Eventl input event");
269 p->this_event |= EVENT_INPUT;
271 if (FD_ISSET(p->fd, &out) || force_event == EVENT_OUTPUT)
274 yaz_log(YLOG_DEBUG, "Eventl output event");
275 p->this_event |= EVENT_OUTPUT;
277 if (FD_ISSET(p->fd, &except) || force_event == EVENT_EXCEPT)
280 p->this_event |= EVENT_EXCEPT;
285 for (nextp = iochans; *nextp; )
288 if (p->destroyed && p->thread_users == 0)
302 void iochan_man_events(iochan_man_t man)
304 if (man->no_threads > 0 && !man->sel_thread)
306 man->sel_thread = sel_thread_create(
307 work_handler, 0 /*work_destroy */, &man->sel_fd, man->no_threads);
308 yaz_log(man->log_level, "iochan_man_events. Using %d threads",
311 event_loop(man, &man->channel_list);
317 * c-file-style: "Stroustrup"
318 * indent-tabs-mode: nil
320 * vim: shiftwidth=4 tabstop=8 expandtab