-/* $Id: eventl.c,v 1.5 2007-04-10 08:48:56 adam Exp $
- Copyright (c) 2006-2007, Index Data.
+/* This file is part of Pazpar2.
+ Copyright (C) 2006-2011 Index Data
-This file is part of Pazpar2.
+ Pazpar2 is free software; you can redistribute it and/or modify it under
+ the terms of the GNU General Public License as published by the Free
+ Software Foundation; either version 2, or (at your option) any later
+ version.
-Pazpar2 is free software; you can redistribute it and/or modify it under
-the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
-version.
+ Pazpar2 is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ for more details.
-Pazpar2 is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-for more details.
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-You should have received a copy of the GNU General Public License
-along with Pazpar2; see the file LICENSE. If not, write to the
-Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA.
*/
/*
* Based on ParaZ - a simple tool for harvesting performance data for
* parallel operations using Z39.50.
- * Copyright (c) 2000-2004 Index Data ApS
+ * Copyright (C) 2006-2011 Index Data ApS
* See LICENSE file for details.
*/
* Based on revision YAZ' server/eventl.c 1.29.
*/
-#include <stdio.h>
-#include <assert.h>
-
#if HAVE_CONFIG_H
-#include <cconfig.h>
+#include <config.h>
#endif
+#include <math.h>
+#include <stdio.h>
+#include <assert.h>
+
#ifdef WIN32
#include <winsock.h>
#else
#include <unistd.h>
#endif
+#if HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <yaz/log.h>
#include <yaz/comstack.h>
#include <yaz/xmalloc.h>
+#include <yaz/mutex.h>
+#include <yaz/poll.h>
#include "eventl.h"
-#include <yaz/statserv.h>
+#include "sel_thread.h"
+
+#if 1
+static YAZ_MUTEX g_mutex = 0;
+static int no_iochans = 0;
+static int no_iochans_total = 0;
+
+static int iochan_use(int delta)
+{
+ int iochans;
+ if (!g_mutex)
+ yaz_mutex_create(&g_mutex);
+ yaz_mutex_enter(g_mutex);
+ no_iochans += delta;
+ if (delta > 0)
+ no_iochans_total += delta;
+ iochans = no_iochans;
+ yaz_mutex_leave(g_mutex);
+ yaz_log(YLOG_DEBUG, "%s iochans=%d", delta == 0 ? "" : (delta > 0 ? "INC" : "DEC"), iochans);
+ return iochans;
+}
+
+int iochans_count(void) {
+ return iochan_use(0);
+}
+
+int iochans_count_total(void) {
+ int total = 0;
+ if (!g_mutex)
+ return 0;
+ yaz_mutex_enter(g_mutex);
+ total = no_iochans_total;
+ yaz_mutex_leave(g_mutex);
+ return total;
+}
+#else
+#define iochan_use(x)
+#define iochans_count(x) 0
+#define iochans_count_total(x) 0
+#endif
+
+struct iochan_man_s {
+ IOCHAN channel_list;
+ sel_thread_t sel_thread;
+ int sel_fd;
+ int no_threads;
+ int log_level;
+ YAZ_MUTEX iochan_mutex;
+};
-IOCHAN iochan_create(int fd, IOC_CALLBACK cb, int flags)
+iochan_man_t iochan_man_create(int no_threads) {
+ iochan_man_t man = xmalloc(sizeof(*man));
+ man->channel_list = 0;
+ man->sel_thread = 0; /* can't create sel_thread yet because we may fork */
+ man->sel_fd = -1;
+ man->no_threads = no_threads;
+ man->log_level = yaz_log_module_level("iochan");
+ man->iochan_mutex = 0;
+ yaz_mutex_create(&man->iochan_mutex);
+ return man;
+}
+
+IOCHAN iochan_destroy_real(IOCHAN chan)
{
+ IOCHAN next = chan->next;
+ if (chan->name)
+ xfree(chan->name);
+ xfree(free);
+ iochan_use(-1);
+ return next;
+}
+
+void iochan_man_destroy(iochan_man_t *mp) {
+ if (*mp) {
+ IOCHAN c;
+ if ((*mp)->sel_thread)
+ sel_thread_destroy((*mp)->sel_thread);
+
+ yaz_mutex_enter((*mp)->iochan_mutex);
+ c = (*mp)->channel_list;
+ (*mp)->channel_list = NULL;
+ yaz_mutex_leave((*mp)->iochan_mutex);
+ while (c) {
+ c = iochan_destroy_real(c);
+ }
+ yaz_mutex_destroy(&(*mp)->iochan_mutex);
+ xfree(*mp);
+ *mp = 0;
+ }
+}
+
+void iochan_add(iochan_man_t man, IOCHAN chan) {
+ chan->man = man;
+ yaz_mutex_enter(man->iochan_mutex);
+ yaz_log(man->log_level, "iochan_add : chan=%p channel list=%p", chan,
+ man->channel_list);
+ chan->next = man->channel_list;
+ man->channel_list = chan;
+ yaz_mutex_leave(man->iochan_mutex);
+}
+
+IOCHAN iochan_create(int fd, IOC_CALLBACK cb, int flags, const char *name) {
IOCHAN new_iochan;
- if (!(new_iochan = (IOCHAN)xmalloc(sizeof(*new_iochan))))
- return 0;
+ if (!(new_iochan = (IOCHAN) xmalloc(sizeof(*new_iochan))))
+ return 0;
+ iochan_use(1);
new_iochan->destroyed = 0;
new_iochan->fd = fd;
new_iochan->flags = flags;
new_iochan->fun = cb;
- new_iochan->force_event = 0;
new_iochan->last_event = new_iochan->max_idle = 0;
new_iochan->next = NULL;
+ new_iochan->man = 0;
+ new_iochan->thread_users = 0;
+ new_iochan->name = name ? xstrdup(name) : 0;
return new_iochan;
}
-int event_loop(IOCHAN *iochans)
-{
+static void work_handler(void *work_data) {
+ IOCHAN p = work_data;
+
+ yaz_log(p->man->log_level, "eventl: work begin chan=%p name=%s event=%d",
+ p, p->name ? p->name : "", p->this_event);
+
+ if (!p->destroyed && (p->this_event & EVENT_TIMEOUT))
+ (*p->fun)(p, EVENT_TIMEOUT);
+ if (!p->destroyed && (p->this_event & EVENT_INPUT))
+ (*p->fun)(p, EVENT_INPUT);
+ if (!p->destroyed && (p->this_event & EVENT_OUTPUT))
+ (*p->fun)(p, EVENT_OUTPUT);
+ if (!p->destroyed && (p->this_event & EVENT_EXCEPT))
+ (*p->fun)(p, EVENT_EXCEPT);
+
+ yaz_log(p->man->log_level, "eventl: work end chan=%p name=%s event=%d", p,
+ p->name ? p->name : "", p->this_event);
+}
+
+static void run_fun(iochan_man_t man, IOCHAN p) {
+ if (p->this_event) {
+ if (man->sel_thread) {
+ yaz_log(man->log_level,
+ "eventl: work add chan=%p name=%s event=%d", p,
+ p->name ? p->name : "", p->this_event);
+ p->thread_users++;
+ sel_thread_add(man->sel_thread, p);
+ } else
+ work_handler(p);
+ }
+}
+
+static int event_loop(iochan_man_t man, IOCHAN *iochans) {
do /* loop as long as there are active associations to process */
{
- IOCHAN p, nextp;
- fd_set in, out, except;
- int res, max;
- static struct timeval nullto = {0, 0}, to;
- struct timeval *timeout;
-
- FD_ZERO(&in);
- FD_ZERO(&out);
- FD_ZERO(&except);
- timeout = &to; /* hang on select */
- to.tv_sec = 30;
- to.tv_usec = 0;
- max = 0;
- for (p = *iochans; p; p = p->next)
- {
- if (p->fd < 0)
+ IOCHAN p, *nextp;
+ IOCHAN start;
+ IOCHAN inv_start;
+ fd_set in, out, except;
+ int res, max;
+ static struct timeval to;
+ struct timeval *timeout;
+
+// struct yaz_poll_fd *fds;
+ int no_fds = 0;
+ FD_ZERO(&in);
+ FD_ZERO(&out);
+ FD_ZERO(&except);
+ timeout = &to; /* hang on select */
+ to.tv_sec = 300;
+ to.tv_usec = 0;
+
+ // INV: start must no change through the loop
+
+ yaz_mutex_enter(man->iochan_mutex);
+ start = man->channel_list;
+ yaz_mutex_leave(man->iochan_mutex);
+ inv_start = start;
+ for (p = start; p; p = p->next) {
+ no_fds++;
+ }
+// fds = (struct yaz_poll_fd *) xmalloc(no_fds * sizeof(*fds));
+
+ max = 0;
+ for (p = start; p; p = p->next) {
+ if (p->thread_users > 0)
continue;
- if (p->force_event)
- timeout = &nullto; /* polling select */
- if (p->flags & EVENT_INPUT)
- FD_SET(p->fd, &in);
- if (p->flags & EVENT_OUTPUT)
- FD_SET(p->fd, &out);
- if (p->flags & EVENT_EXCEPT)
- FD_SET(p->fd, &except);
- if (p->fd > max)
- max = p->fd;
- }
- if ((res = select(max + 1, &in, &out, &except, timeout)) < 0)
- {
- if (errno == EINTR)
- continue;
- else
- abort();
- }
- for (p = *iochans; p; p = p->next)
- {
- int force_event = p->force_event;
- time_t now = time(0);
-
- p->force_event = 0;
- if (!p->destroyed && ((p->max_idle && now - p->last_event >
- p->max_idle) || force_event == EVENT_TIMEOUT))
- {
- p->last_event = now;
- (*p->fun)(p, EVENT_TIMEOUT);
- }
+ if (p->max_idle && p->max_idle < to.tv_sec)
+ to.tv_sec = p->max_idle;
if (p->fd < 0)
continue;
- if (!p->destroyed && (FD_ISSET(p->fd, &in) ||
- force_event == EVENT_INPUT))
- {
- p->last_event = now;
- (*p->fun)(p, EVENT_INPUT);
- }
- if (!p->destroyed && (FD_ISSET(p->fd, &out) ||
- force_event == EVENT_OUTPUT))
- {
- p->last_event = now;
- (*p->fun)(p, EVENT_OUTPUT);
- }
- if (!p->destroyed && (FD_ISSET(p->fd, &except) ||
- force_event == EVENT_EXCEPT))
- {
- p->last_event = now;
- (*p->fun)(p, EVENT_EXCEPT);
- }
- }
- for (p = *iochans; p; p = nextp)
- {
- nextp = p->next;
-
- if (p->destroyed)
- {
- IOCHAN tmp = p, pr;
-
- /* Now reset the pointers */
- if (p == *iochans)
- *iochans = p->next;
- else
- {
- for (pr = *iochans; pr; pr = pr->next)
- if (pr->next == p)
- break;
- assert(pr); /* grave error if it weren't there */
- pr->next = p->next;
- }
- if (nextp == p)
- nextp = p->next;
- xfree(tmp);
- }
- }
- }
- while (*iochans);
+ if (p->flags & EVENT_INPUT)
+ FD_SET(p->fd, &in);
+ if (p->flags & EVENT_OUTPUT)
+ FD_SET(p->fd, &out);
+ if (p->flags & EVENT_EXCEPT)
+ FD_SET(p->fd, &except);
+ if (p->fd > max)
+ max = p->fd;
+ }
+ yaz_log(man->log_level, "max=%d sel_fd=%d", max, man->sel_fd);
+
+ if (man->sel_fd != -1) {
+ if (man->sel_fd > max)
+ max = man->sel_fd;
+ FD_SET(man->sel_fd, &in);
+ }
+ yaz_log(man->log_level, "select begin nofds=%d", max);
+ res = select(max + 1, &in, &out, &except, timeout);
+ yaz_log(man->log_level, "select returned res=%d", res);
+ if (res < 0) {
+ if (errno == EINTR)
+ continue;
+ else {
+ yaz_log(YLOG_ERRNO | YLOG_WARN, "select");
+ return 0;
+ }
+ }
+ if (man->sel_fd != -1) {
+ if (FD_ISSET(man->sel_fd, &in)) {
+ IOCHAN chan;
+
+ yaz_log(man->log_level, "eventl: sel input on sel_fd=%d",
+ man->sel_fd);
+ while ((chan = sel_thread_result(man->sel_thread))) {
+ yaz_log(man->log_level,
+ "eventl: got thread result chan=%p name=%s", chan,
+ chan->name ? chan->name : "");
+ chan->thread_users--;
+ }
+ }
+ }
+ if (man->log_level) {
+ int no = 0;
+ for (p = start; p; p = p->next) {
+ no++;
+ }
+ yaz_log(man->log_level, "%d channels", no);
+ }
+ for (p = start; p; p = p->next) {
+ time_t now = time(0);
+
+ if (p->destroyed) {
+ yaz_log(man->log_level,
+ "eventl: skip destroyed chan=%p name=%s", p,
+ p->name ? p->name : "");
+ continue;
+ }
+ if (p->thread_users > 0) {
+ yaz_log(man->log_level,
+ "eventl: skip chan=%p name=%s users=%d", p,
+ p->name ? p->name : "", p->thread_users);
+ continue;
+ }
+ p->this_event = 0;
+
+ if (p->max_idle && now - p->last_event > p->max_idle) {
+ p->last_event = now;
+ p->this_event |= EVENT_TIMEOUT;
+ }
+ if (p->fd >= 0) {
+ if (FD_ISSET(p->fd, &in)) {
+ p->last_event = now;
+ p->this_event |= EVENT_INPUT;
+ }
+ if (FD_ISSET(p->fd, &out)) {
+ p->last_event = now;
+ p->this_event |= EVENT_OUTPUT;
+ }
+ if (FD_ISSET(p->fd, &except)) {
+ p->last_event = now;
+ p->this_event |= EVENT_EXCEPT;
+ }
+ }
+ run_fun(man, p);
+ }
+ assert(inv_start == start);
+ yaz_mutex_enter(man->iochan_mutex);
+ for (nextp = iochans; *nextp;) {
+ IOCHAN p = *nextp;
+ if (p->destroyed && p->thread_users == 0) {
+ *nextp = iochan_destroy_real(*nextp);
+ } else
+ nextp = &p->next;
+ }
+ yaz_mutex_leave(man->iochan_mutex);
+ } while (*iochans);
return 0;
}
+void iochan_man_events(iochan_man_t man) {
+ if (man->no_threads > 0 && !man->sel_thread) {
+ man->sel_thread = sel_thread_create(work_handler, 0 /*work_destroy */,
+ &man->sel_fd, man->no_threads);
+ yaz_log(man->log_level, "iochan_man_events. Using %d threads",
+ man->no_threads);
+ }
+ event_loop(man, &man->channel_list);
+}
+
+void pazpar2_sleep(double d) {
+#ifdef WIN32
+ Sleep( (DWORD) (d * 1000));
+#else
+ struct timeval tv;
+ tv.tv_sec = floor(d);
+ tv.tv_usec = (d - floor(d)) * 1000000;
+ select(0, 0, 0, 0, &tv);
+#endif
+}
+
/*
* Local variables:
* c-basic-offset: 4
+ * c-file-style: "Stroustrup"
* indent-tabs-mode: nil
* End:
* vim: shiftwidth=4 tabstop=8 expandtab
*/
+