/*
- * Copyright (C) 1994, Index Data I/S
- * All rights reserved.
+ * Copyright (c) 1995-2003, Index Data
+ * See the file LICENSE for details.
* Sebastian Hammer, Adam Dickmeiss
*
- * $Log: eventl.c,v $
- * Revision 1.1 1995-03-10 18:22:44 quinn
- * The rudiments of an asynchronous server.
- *
+ * $Id: eventl.c,v 1.35 2003-02-12 15:06:43 adam Exp $
*/
+#include <stdio.h>
#include <assert.h>
-#include <sys/time.h>
-#include <sys/types.h>
+#ifdef WIN32
+#include <winsock.h>
+#else
#include <unistd.h>
+#endif
#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+
+#include <yaz/yconfig.h>
+#include <yaz/log.h>
+#include <yaz/comstack.h>
+#include <yaz/xmalloc.h>
+#include "eventl.h"
+#include "session.h"
+#include <yaz/statserv.h>
-#include <eventl.h>
+#if YAZ_GNU_THREADS
+#include <pth.h>
+#define YAZ_EV_SELECT pth_select
+#endif
-IOCHAN iochans = 0;
+#ifndef YAZ_EV_SELECT
+#define YAZ_EV_SELECT select
+#endif
IOCHAN iochan_create(int fd, IOC_CALLBACK cb, int flags)
{
- IOCHAN new;
+ IOCHAN new_iochan;
- if (!(new = malloc(sizeof(*new))))
+ if (!(new_iochan = (IOCHAN)xmalloc(sizeof(*new_iochan))))
return 0;
- new->destroyed = 0;
- new->fd = fd;
- new->flags = flags;
- new->fun = cb;
- return new;
-}
-
-void iochan_destroy(IOCHAN i)
-{
- i->destroyed = 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;
+ return new_iochan;
}
-int event_loop()
+int event_loop(IOCHAN *iochans)
{
- do
+ 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;
+ if (statserv_must_terminate())
+ {
+ for (p = *iochans; p; p = p->next)
+ p->force_event = EVENT_TIMEOUT;
+ }
FD_ZERO(&in);
FD_ZERO(&out);
FD_ZERO(&except);
- for (p = iochans; p; p = p->next)
+ timeout = &to; /* hang on select */
+ to.tv_sec = 5*60;
+ to.tv_usec = 0;
+ max = 0;
+ for (p = *iochans; p; p = p->next)
{
+ yaz_log(LOG_LOG, "fd=%d flags=%d force_event=%d",
+ p->fd, p->flags, p->force_event);
+ if (p->force_event)
+ timeout = &nullto; /* polling select */
if (p->flags & EVENT_INPUT)
- FD_SET(p->fd, &in);
+ FD_SET(p->fd, &in);
if (p->flags & EVENT_OUTPUT)
- FD_SET(p->fd, &out);
+ FD_SET(p->fd, &out);
if (p->flags & EVENT_EXCEPT)
- FD_SET(p->fd, &except);
+ FD_SET(p->fd, &except);
if (p->fd > max)
- max = p->fd;
+ max = p->fd;
}
- if ((res = select(max + 1, &in, &out, &except, 0)) < 0)
+ yaz_log(LOG_LOG, "select start");
+ res = YAZ_EV_SELECT(max + 1, &in, &out, &except, timeout);
+ yaz_log(LOG_LOG, "select end");
+ if (res < 0)
{
- if (errno == EINTR)
- continue;
- return 1;
+ if (yaz_errno() == EINTR)
+ {
+ if (statserv_must_terminate())
+ {
+ for (p = *iochans; p; p = p->next)
+ p->force_event = EVENT_TIMEOUT;
+ }
+ continue;
+ }
+ else
+ {
+ /* Destroy the first member in the chain, and try again */
+ association *assoc = (association *)iochan_getdata(*iochans);
+ COMSTACK conn = assoc->client_link;
+
+ cs_close(conn);
+ destroy_association(assoc);
+ iochan_destroy(*iochans);
+ yaz_log(LOG_DEBUG, "error select, destroying iochan %p",
+ *iochans);
+ }
}
- if (!res)
- continue;
- for (p = iochans; p; p = nextp)
+ for (p = *iochans; p; p = p->next)
{
- nextp = p->next;
- if (FD_ISSET(p->fd, &in))
- (*p->fun)(p, EVENT_INPUT);
- if (!p->destroyed && FD_ISSET(p->fd, &in))
+ int force_event = p->force_event;
+ time_t now = time(0);
+
+ p->force_event = 0;
+ 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))
+ }
+ if (!p->destroyed && (FD_ISSET(p->fd, &except) ||
+ force_event == EVENT_EXCEPT))
+ {
+ p->last_event = now;
(*p->fun)(p, EVENT_EXCEPT);
+ }
+ 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);
+ }
+ }
+ for (p = *iochans; p; p = nextp)
+ {
+ nextp = p->next;
+
if (p->destroyed)
{
- IOCHAN tmp = p, pr;
+ IOCHAN tmp = p, pr;
+
+ /* We need to inform the threadlist that this channel has been destroyed */
+ statserv_remove(p);
- if (p == iochans)
- iochans = p->next;
+ /* 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);
+ 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;
- free(tmp);
+ xfree(tmp);
}
}
}
- while (iochans);
+ while (*iochans);
return 0;
}
projects / yaz-moved-to-github.git / blobdiff