Eventhandling: fix shutdownhandlers
[citadel.git] / citadel / modules / eventclient / serv_eventclient.c
index 53cbea4bd95e440734e2935fe84873ff8c438a3c..f991cf90587480a53b73735a9ab5fe9387c6ce0c 100644 (file)
@@ -1,19 +1,19 @@
 /*
- * Copyright (c) 1998-2009 by the citadel.org team
+ * Copyright (c) 1998-2012 by the citadel.org team
  *
- *  This program 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 3 of the License, or
- *  (at your option) any later version.
+ *  This program is open source software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 3.
+ *  
+ *  
  *
  *  This program 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *  
+ *  
+ *  
  */
 
 #include "sysdep.h"
 #include "serv_curl.h"
 
 ev_loop *event_base;
+int DebugEventLoop = 0;
+int DebugEventLoopBacktrace = 0;
+int DebugCurl = 0;
 
 long EvIDSource = 1;
 /*****************************************************************************
  *                   libevent / curl integration                             *
  *****************************************************************************/
-#define MOPT(s, v)                                                      \
-        do {                                                            \
-                sta = curl_multi_setopt(mhnd, (CURLMOPT_##s), (v));     \
-                if (sta) {                                              \
-                        syslog(LOG_ERR, "EVCURL: error setting option " #s " on curl multi handle: %s\n", curl_easy_strerror(sta)); \
-                        exit (1);                                       \
-                }                                                       \
-        } while (0)
+#define DBGLOG(LEVEL) if ((LEVEL != LOG_DEBUG) || (DebugCurl != 0))
+
+#define EVCURL_syslog(LEVEL, FORMAT, ...)                              \
+       DBGLOG (LEVEL) syslog(LEVEL, "EVCURL:IO[%ld]CC[%d] " FORMAT,    \
+                             IO->ID, CCID, __VA_ARGS__)
+
+#define EVCURLM_syslog(LEVEL, FORMAT)                                  \
+       DBGLOG (LEVEL) syslog(LEVEL, "EVCURL:IO[%ld]CC[%d] " FORMAT,    \
+                             IO->ID, CCID)
+
+#define CURL_syslog(LEVEL, FORMAT, ...)                                        \
+       DBGLOG (LEVEL) syslog(LEVEL, "CURL: " FORMAT, __VA_ARGS__)
+
+#define CURLM_syslog(LEVEL, FORMAT)                    \
+       DBGLOG (LEVEL) syslog(LEVEL, "CURL: " FORMAT)
+
+#define MOPT(s, v)                                                     \
+       do {                                                            \
+               sta = curl_multi_setopt(mhnd, (CURLMOPT_##s), (v));     \
+               if (sta) {                                              \
+                       EVQ_syslog(LOG_ERR, "error setting option "     \
+                              #s " on curl multi handle: %s\n",        \
+                              curl_easy_strerror(sta));                \
+                       exit (1);                                       \
+               }                                                       \
+       } while (0)
+
 
 typedef struct _evcurl_global_data {
-        int magic;
-        CURLM *mhnd;
-        ev_timer timeev;
-        int nrun;
+       int magic;
+       CURLM *mhnd;
+       ev_timer timeev;
+       int nrun;
 } evcurl_global_data;
 
 ev_async WakeupCurl;
 evcurl_global_data global;
 
 static void
-gotstatus(int nnrun) 
+gotstatus(int nnrun)
 {
-        CURLMsg *msg;
-        int nmsg;
-
-        global.nrun = nnrun;
-
-        syslog(LOG_DEBUG, "CURLEV: gotstatus(): about to call curl_multi_info_read\n");
-        while ((msg = curl_multi_info_read(global.mhnd, &nmsg))) {
-                syslog(LOG_ERR, "EVCURL: got curl multi_info message msg=%d\n", msg->msg);
-                if (CURLMSG_DONE == msg->msg) {
-                        CURL *chnd;
-                        char *chandle;
-                        CURLcode sta;
-                        CURLMcode msta;
-                        AsyncIO  *IO;
-
-                        chandle = NULL;;
-                        chnd = msg->easy_handle;
-                        sta = curl_easy_getinfo(chnd, CURLINFO_PRIVATE, &chandle);
-                        syslog(LOG_ERR, "EVCURL: request complete\n");
-                        if (sta)
-                                syslog(LOG_ERR, "EVCURL: error asking curl for private cookie of curl handle: %s\n", curl_easy_strerror(sta));
-                        IO = (AsyncIO *)chandle;
-                        
-                        ev_io_stop(event_base, &IO->recv_event);
-                        ev_io_stop(event_base, &IO->send_event);
-
-                        sta = msg->data.result;
-                        if (sta) {
-                                EV_syslog(LOG_ERR, "EVCURL: error description: %s\n", IO->HttpReq.errdesc);
-                                EV_syslog(LOG_ERR, "EVCURL: error performing request: %s\n", curl_easy_strerror(sta));
-                        }
-                        sta = curl_easy_getinfo(chnd, CURLINFO_RESPONSE_CODE, &IO->HttpReq.httpcode);
-                        if (sta)
-                                EV_syslog(LOG_ERR, "EVCURL: error asking curl for response code from request: %s\n", curl_easy_strerror(sta));
-                        EV_syslog(LOG_ERR, "EVCURL: http response code was %ld\n", (long)IO->HttpReq.httpcode);
-
-
-                        curl_slist_free_all(IO->HttpReq.headers);
-                        msta = curl_multi_remove_handle(global.mhnd, chnd);
-                        if (msta)
-                                EV_syslog(LOG_ERR, "EVCURL: warning problem detaching completed handle from curl multi: %s\n", curl_multi_strerror(msta));
-
-                       ev_cleanup_stop(event_base, &IO->abort_by_shutdown);
-
-                        IO->HttpReq.attached = 0;
-                        switch(IO->SendDone(IO))
+       CURLMsg *msg;
+       int nmsg;
+
+       global.nrun = nnrun;
+
+       CURLM_syslog(LOG_DEBUG,
+                    "gotstatus(): about to call curl_multi_info_read\n");
+       while ((msg = curl_multi_info_read(global.mhnd, &nmsg))) {
+               CURL_syslog(LOG_DEBUG,
+                           "got curl multi_info message msg=%d\n",
+                           msg->msg);
+
+               if (CURLMSG_DONE == msg->msg) {
+                       CURL *chnd;
+                       char *chandle = NULL;
+                       CURLcode sta;
+                       CURLMcode msta;
+                       AsyncIO*IO;
+
+                       chandle = NULL;;
+                       chnd = msg->easy_handle;
+                       sta = curl_easy_getinfo(chnd,
+                                               CURLINFO_PRIVATE,
+                                               &chandle);
+                       if (sta) {
+                               EVCURL_syslog(LOG_ERR,
+                                             "error asking curl for private"
+                                             " cookie of curl handle: %s\n",
+                                             curl_easy_strerror(sta));
+                               continue;
+                       }
+                       IO = (AsyncIO *)chandle;
+                       if (IO->ID == 0) {
+                               EVCURL_syslog(LOG_ERR,
+                                             "Error, invalid IO context %p\n",
+                                             IO);
+                               continue;
+                       }
+
+                       EVCURLM_syslog(LOG_DEBUG, "request complete\n");
+
+                       IO->Now = ev_now(event_base);
+
+                       ev_io_stop(event_base, &IO->recv_event);
+                       ev_io_stop(event_base, &IO->send_event);
+
+                       sta = msg->data.result;
+                       if (sta) {
+                               EVCURL_syslog(LOG_ERR,
+                                             "error description: %s\n",
+                                             IO->HttpReq.errdesc);
+                               EVCURL_syslog(LOG_ERR,
+                                             "error performing request: %s\n",
+                                             curl_easy_strerror(sta));
+                       }
+                       sta = curl_easy_getinfo(chnd,
+                                               CURLINFO_RESPONSE_CODE,
+                                               &IO->HttpReq.httpcode);
+                       if (sta)
+                               EVCURL_syslog(LOG_ERR,
+                                             "error asking curl for "
+                                             "response code from request: %s\n",
+                                             curl_easy_strerror(sta));
+                       EVCURL_syslog(LOG_DEBUG,
+                                     "http response code was %ld\n",
+                                     (long)IO->HttpReq.httpcode);
+
+
+                       curl_slist_free_all(IO->HttpReq.headers);
+                       msta = curl_multi_remove_handle(global.mhnd, chnd);
+                       if (msta)
+                               EVCURL_syslog(LOG_ERR,
+                                             "warning problem detaching "
+                                             "completed handle from curl multi: "
+                                             "%s\n",
+                                             curl_multi_strerror(msta));
+
+                      ev_cleanup_stop(event_base, &IO->abort_by_shutdown);
+
+                       IO->HttpReq.attached = 0;
+                       switch(IO->SendDone(IO))
                        {
                        case eDBQuery:
                                curl_easy_cleanup(IO->HttpReq.chnd);
@@ -141,10 +198,10 @@ gotstatus(int nnrun)
                        case eSendDNSQuery:
                        case eReadDNSReply:
                        case eConnect:
-                       case eSendReply: 
+                       case eSendReply:
                        case eSendMore:
                        case eSendFile:
-                       case eReadMessage: 
+                       case eReadMessage:
                        case eReadMore:
                        case eReadPayload:
                        case eReadFile:
@@ -160,83 +217,116 @@ gotstatus(int nnrun)
                                RemoveContext(IO->CitContext);
                                IO->Terminate(IO);
                        }
-                }
-        }
+               }
+       }
 }
 
 static void
 stepmulti(void *data, curl_socket_t fd, int which)
 {
-        int running_handles = 0;
-        CURLMcode msta;
-        
-        msta = curl_multi_socket_action(global.mhnd, fd, which, &running_handles);
-        syslog(LOG_DEBUG, "EVCURL: stepmulti(): calling gotstatus()\n");
-        if (msta)
-                syslog(LOG_ERR, "EVCURL: error in curl processing events on multi handle, fd %d: %s\n", (int)fd, curl_multi_strerror(msta));
-        if (global.nrun != running_handles)
-                gotstatus(running_handles);
+       int running_handles = 0;
+       CURLMcode msta;
+
+       msta = curl_multi_socket_action(global.mhnd,
+                                       fd,
+                                       which,
+                                       &running_handles);
+
+       CURLM_syslog(LOG_DEBUG, "stepmulti(): calling gotstatus()\n");
+       if (msta)
+               CURL_syslog(LOG_ERR,
+                           "error in curl processing events"
+                           "on multi handle, fd %d: %s\n",
+                           (int)fd,
+                           curl_multi_strerror(msta));
+
+       if (global.nrun != running_handles)
+               gotstatus(running_handles);
 }
 
 static void
-gottime(struct ev_loop *loop, ev_timer *timeev, int events) {
-        syslog(LOG_DEBUG, "EVCURL: waking up curl for timeout\n");
-        stepmulti(NULL, CURL_SOCKET_TIMEOUT, 0);
+gottime(struct ev_loop *loop, ev_timer *timeev, int events)
+{
+       CURLM_syslog(LOG_DEBUG, "EVCURL: waking up curl for timeout\n");
+       stepmulti(NULL, CURL_SOCKET_TIMEOUT, 0);
 }
 
 static void
-got_in(struct ev_loop *loop, ev_io *ioev, int events) {
-        syslog(LOG_DEBUG, "EVCURL: waking up curl for io on fd %d\n", (int)ioev->fd);
-        stepmulti(ioev->data, ioev->fd, CURL_CSELECT_IN);
+got_in(struct ev_loop *loop, ev_io *ioev, int events)
+{
+       CURL_syslog(LOG_DEBUG,
+                   "EVCURL: waking up curl for io on fd %d\n",
+                   (int)ioev->fd);
+
+       stepmulti(ioev->data, ioev->fd, CURL_CSELECT_IN);
 }
 
 static void
-got_out(struct ev_loop *loop, ev_io *ioev, int events) {
-        syslog(LOG_DEBUG, "EVCURL: waking up curl for io on fd %d\n", (int)ioev->fd);
-        stepmulti(ioev->data, ioev->fd, CURL_CSELECT_OUT);
+got_out(struct ev_loop *loop, ev_io *ioev, int events)
+{
+       CURL_syslog(LOG_DEBUG,
+                   "waking up curl for io on fd %d\n",
+                   (int)ioev->fd);
+
+       stepmulti(ioev->data, ioev->fd, CURL_CSELECT_OUT);
 }
 
 static size_t
 gotdata(void *data, size_t size, size_t nmemb, void *cglobal) {
-        AsyncIO *IO = (AsyncIO*) cglobal;
+       AsyncIO *IO = (AsyncIO*) cglobal;
 
-        if (IO->HttpReq.ReplyData == NULL)
-        {
-            IO->HttpReq.ReplyData = NewStrBufPlain(NULL, SIZ);
-        }
-        return CurlFillStrBuf_callback(data, size, nmemb, IO->HttpReq.ReplyData);
+       if (IO->HttpReq.ReplyData == NULL)
+       {
+               IO->HttpReq.ReplyData = NewStrBufPlain(NULL, SIZ);
+       }
+       IO->Now = ev_now(event_base);
+       return CurlFillStrBuf_callback(data,
+                                      size,
+                                      nmemb,
+                                      IO->HttpReq.ReplyData);
 }
 
 static int
 gotwatchtime(CURLM *multi, long tblock_ms, void *cglobal) {
-        syslog(LOG_DEBUG, "EVCURL: gotwatchtime called %ld ms\n", tblock_ms);
-        evcurl_global_data *global = cglobal;
-        ev_timer_stop(EV_DEFAULT, &global->timeev);
-        if (tblock_ms < 0 || 14000 < tblock_ms)
-                tblock_ms = 14000;
-        ev_timer_set(&global->timeev, 0.5e-3 + 1.0e-3 * tblock_ms, 14.0);
-        ev_timer_start(EV_DEFAULT_UC, &global->timeev);
-        curl_multi_perform(global, &global->nrun);
-        return 0;
+       CURL_syslog(LOG_DEBUG, "EVCURL: gotwatchtime called %ld ms\n", tblock_ms);
+       evcurl_global_data *global = cglobal;
+       ev_timer_stop(EV_DEFAULT, &global->timeev);
+       if (tblock_ms < 0 || 14000 < tblock_ms)
+               tblock_ms = 14000;
+       ev_timer_set(&global->timeev, 0.5e-3 + 1.0e-3 * tblock_ms, 14.0);
+       ev_timer_start(EV_DEFAULT_UC, &global->timeev);
+       curl_multi_perform(global, &global->nrun);
+       return 0;
 }
 
 static int
-gotwatchsock(CURL *easy, curl_socket_t fd, int action, void *cglobal, void *vIO) {
-        evcurl_global_data *global = cglobal;
-        CURLM *mhnd = global->mhnd;
-        char *f;
-        AsyncIO *IO = (AsyncIO*) vIO;
-        CURLcode sta;
+gotwatchsock(CURL *easy,
+            curl_socket_t fd,
+            int action,
+            void *cglobal,
+            void *vIO)
+{
+       evcurl_global_data *global = cglobal;
+       CURLM *mhnd = global->mhnd;
+       char *f;
+       AsyncIO *IO = (AsyncIO*) vIO;
+       CURLcode sta;
        const char *Action;
 
        if (IO == NULL) {
-                sta = curl_easy_getinfo(easy, CURLINFO_PRIVATE, &f);
-                if (sta) {
-                        EV_syslog(LOG_ERR, "EVCURL: error asking curl for private cookie of curl handle: %s\n", curl_easy_strerror(sta));
-                        return -1;
-                }
-                IO = (AsyncIO *) f;
-               EV_syslog(LOG_DEBUG, "EVCURL: got socket for URL: %s\n", IO->ConnectMe->PlainUrl);
+               sta = curl_easy_getinfo(easy, CURLINFO_PRIVATE, &f);
+               if (sta) {
+                       EVCURL_syslog(LOG_ERR,
+                                     "EVCURL: error asking curl for private "
+                                     "cookie of curl handle: %s\n",
+                                     curl_easy_strerror(sta));
+                       return -1;
+               }
+               IO = (AsyncIO *) f;
+               EVCURL_syslog(LOG_DEBUG,
+                             "EVCURL: got socket for URL: %s\n",
+                             IO->ConnectMe->PlainUrl);
+
                if (IO->SendBuf.fd != 0)
                {
                        ev_io_stop(event_base, &IO->recv_event);
@@ -248,182 +338,176 @@ gotwatchsock(CURL *easy, curl_socket_t fd, int action, void *cglobal, void *vIO)
                curl_multi_assign(mhnd, fd, IO);
        }
 
+       IO->Now = ev_now(event_base);
+
        Action = "";
        switch (action)
        {
        case CURL_POLL_NONE:
-                Action = "CURL_POLL_NONE";
+               Action = "CURL_POLL_NONE";
                break;
        case CURL_POLL_REMOVE:
-                Action = "CURL_POLL_REMOVE";
+               Action = "CURL_POLL_REMOVE";
                break;
        case CURL_POLL_IN:
-                Action = "CURL_POLL_IN";
+               Action = "CURL_POLL_IN";
                break;
        case CURL_POLL_OUT:
-                Action = "CURL_POLL_OUT";
+               Action = "CURL_POLL_OUT";
                break;
        case CURL_POLL_INOUT:
-                Action = "CURL_POLL_INOUT";
+               Action = "CURL_POLL_INOUT";
                break;
-        }
+       }
 
 
-        EV_syslog(LOG_DEBUG, "EVCURL: gotwatchsock called fd=%d action=%s[%d]\n", (int)fd, Action, action);
+       EVCURL_syslog(LOG_DEBUG,
+                     "EVCURL: gotwatchsock called fd=%d action=%s[%d]\n",
+                     (int)fd, Action, action);
 
        switch (action)
        {
        case CURL_POLL_NONE:
-                EVM_syslog(LOG_ERR,"EVCURL: called first time to register this sockwatcker\n");
+               EVCURLM_syslog(LOG_DEBUG,
+                              "called first time "
+                              "to register this sockwatcker\n");
                break;
        case CURL_POLL_REMOVE:
-                EVM_syslog(LOG_ERR,"EVCURL: called last time to unregister this sockwatcher\n");
-                ev_io_stop(event_base, &IO->recv_event);
-                ev_io_stop(event_base, &IO->send_event);
+               EVCURLM_syslog(LOG_DEBUG,
+                              "called last time to unregister "
+                              "this sockwatcher\n");
+               ev_io_stop(event_base, &IO->recv_event);
+               ev_io_stop(event_base, &IO->send_event);
                break;
        case CURL_POLL_IN:
-                ev_io_start(event_base, &IO->recv_event);
-                ev_io_stop(event_base, &IO->send_event);
+               ev_io_start(event_base, &IO->recv_event);
+               ev_io_stop(event_base, &IO->send_event);
                break;
        case CURL_POLL_OUT:
-                ev_io_start(event_base, &IO->send_event);
-                ev_io_stop(event_base, &IO->recv_event);
+               ev_io_start(event_base, &IO->send_event);
+               ev_io_stop(event_base, &IO->recv_event);
                break;
        case CURL_POLL_INOUT:
-                ev_io_start(event_base, &IO->send_event);
-                ev_io_start(event_base, &IO->recv_event);
+               ev_io_start(event_base, &IO->send_event);
+               ev_io_start(event_base, &IO->recv_event);
                break;
-        }
-        return 0;
+       }
+       return 0;
 }
 
-void curl_init_connectionpool(void) 
+void curl_init_connectionpool(void)
 {
-        CURLM *mhnd ;
-
-        ev_timer_init(&global.timeev, &gottime, 14.0, 14.0);
-        global.timeev.data = (void *)&global;
-        global.nrun = -1;
-        CURLcode sta = curl_global_init(CURL_GLOBAL_ALL);
-
-        if (sta) 
-        {
-                syslog(LOG_ERR,"EVCURL: error initializing curl library: %s\n", curl_easy_strerror(sta));
-                exit(1);
-        }
-        mhnd = global.mhnd = curl_multi_init();
-        if (!mhnd)
-        {
-                syslog(LOG_ERR,"EVCURL: error initializing curl multi handle\n");
-                exit(3);
-        }
-
-        MOPT(SOCKETFUNCTION, &gotwatchsock);
-        MOPT(SOCKETDATA, (void *)&global);
-        MOPT(TIMERFUNCTION, &gotwatchtime);
-        MOPT(TIMERDATA, (void *)&global);
-
-        return;
-}
+       CURLM *mhnd ;
 
+       ev_timer_init(&global.timeev, &gottime, 14.0, 14.0);
+       global.timeev.data = (void *)&global;
+       global.nrun = -1;
+       CURLcode sta = curl_global_init(CURL_GLOBAL_ALL);
 
+       if (sta)
+       {
+               CURL_syslog(LOG_ERR,
+                           "error initializing curl library: %s\n",
+                           curl_easy_strerror(sta));
 
+               exit(1);
+       }
+       mhnd = global.mhnd = curl_multi_init();
+       if (!mhnd)
+       {
+               CURLM_syslog(LOG_ERR,
+                            "error initializing curl multi handle\n");
+               exit(3);
+       }
 
-int evcurl_init(AsyncIO *IO,
-                void *CustomData,
-                const char* Desc,
-                IO_CallBack CallBack,
-                IO_CallBack Terminate, 
-               IO_CallBack ShutdownAbort)
+       MOPT(SOCKETFUNCTION, &gotwatchsock);
+       MOPT(SOCKETDATA, (void *)&global);
+       MOPT(TIMERFUNCTION, &gotwatchtime);
+       MOPT(TIMERDATA, (void *)&global);
+
+       return;
+}
+
+int evcurl_init(AsyncIO *IO)
 {
-        CURLcode sta;
-        CURL *chnd;
-
-        EVM_syslog(LOG_DEBUG, "EVCURL: evcurl_init called ms\n");
-        IO->HttpReq.attached = 0;
-        IO->SendDone = CallBack;
-        IO->Terminate = Terminate;
-       IO->ShutdownAbort = ShutdownAbort;
-        chnd = IO->HttpReq.chnd = curl_easy_init();
-        if (!chnd)
-        {
-                EVM_syslog(LOG_ERR, "EVCURL: error initializing curl handle\n");
-                return 1;
-        }
-
-        strcpy(IO->HttpReq.errdesc, Desc);
-
-        OPT(VERBOSE, (long)1);
-                /* unset in production */
-        OPT(NOPROGRESS, 1L); 
-        OPT(NOSIGNAL, 1L);
-        OPT(FAILONERROR, (long)1);
-        OPT(ENCODING, "");
-        OPT(FOLLOWLOCATION, (long)0);
-        OPT(MAXREDIRS, (long)0);
-        OPT(USERAGENT, CITADEL);
-
-        OPT(TIMEOUT, (long)1800);
-        OPT(LOW_SPEED_LIMIT, (long)64);
-        OPT(LOW_SPEED_TIME, (long)600);
-        OPT(CONNECTTIMEOUT, (long)600); 
-        OPT(PRIVATE, (void *)IO);
-
-        OPT(FORBID_REUSE, 1);
-       OPT(WRITEFUNCTION, &gotdata); 
+       CURLcode sta;
+       CURL *chnd;
+
+       EVCURLM_syslog(LOG_DEBUG, "EVCURL: evcurl_init called ms\n");
+       IO->HttpReq.attached = 0;
+       chnd = IO->HttpReq.chnd = curl_easy_init();
+       if (!chnd)
+       {
+               EVCURLM_syslog(LOG_ERR, "EVCURL: error initializing curl handle\n");
+               return 0;
+       }
+
+#if DEBUG
+       OPT(VERBOSE, (long)1);
+#endif
+       OPT(NOPROGRESS, 1L);
+
+       OPT(NOSIGNAL, 1L);
+       OPT(FAILONERROR, (long)1);
+       OPT(ENCODING, "");
+       OPT(FOLLOWLOCATION, (long)0);
+       OPT(MAXREDIRS, (long)0);
+       OPT(USERAGENT, CITADEL);
+
+       OPT(TIMEOUT, (long)1800);
+       OPT(LOW_SPEED_LIMIT, (long)64);
+       OPT(LOW_SPEED_TIME, (long)600);
+       OPT(CONNECTTIMEOUT, (long)600);
+       OPT(PRIVATE, (void *)IO);
+
+       OPT(FORBID_REUSE, 1);
+       OPT(WRITEFUNCTION, &gotdata);
        OPT(WRITEDATA, (void *)IO);
        OPT(ERRORBUFFER, IO->HttpReq.errdesc);
 
-       if (
-               (!IsEmptyStr(config.c_ip_addr))
+       if ((!IsEmptyStr(config.c_ip_addr))
                && (strcmp(config.c_ip_addr, "*"))
                && (strcmp(config.c_ip_addr, "::"))
                && (strcmp(config.c_ip_addr, "0.0.0.0"))
-       ) {
-               OPT(INTERFACE, config.c_ip_addr);
-       }
-               /* point to a structure that points back to the perl structure and stuff */
-       EV_syslog(LOG_DEBUG, "EVCURL: Loading URL: %s\n", IO->ConnectMe->PlainUrl);
-       OPT(URL, IO->ConnectMe->PlainUrl);
-       if (StrLength(IO->ConnectMe->CurlCreds))
+               )
        {
-               OPT(HTTPAUTH, (long)CURLAUTH_BASIC);
-               OPT(USERPWD, ChrPtr(IO->ConnectMe->CurlCreds));
+               OPT(INTERFACE, config.c_ip_addr);
        }
+
 #ifdef CURLOPT_HTTP_CONTENT_DECODING
        OPT(HTTP_CONTENT_DECODING, 1);
        OPT(ENCODING, "");
 #endif
-       if (StrLength(IO->HttpReq.PostData) > 0)
-       { 
-               OPT(POSTFIELDS, ChrPtr(IO->HttpReq.PostData));
-               OPT(POSTFIELDSIZE, StrLength(IO->HttpReq.PostData));
 
-       }
-       else if ((IO->HttpReq.PlainPostDataLen != 0) && (IO->HttpReq.PlainPostData != NULL))
-       {
-               OPT(POSTFIELDS, IO->HttpReq.PlainPostData);
-               OPT(POSTFIELDSIZE, IO->HttpReq.PlainPostDataLen);
-       }
-
-       IO->HttpReq.headers = curl_slist_append(IO->HttpReq.headers, "Connection: close");
-       OPT(HTTPHEADER, IO->HttpReq.headers);
+       IO->HttpReq.headers = curl_slist_append(IO->HttpReq.headers,
+                                               "Connection: close");
 
        return 1;
 }
 
 
-static void IOcurl_abort_shutdown_callback(struct ev_loop *loop, ev_cleanup *watcher, int revents)
+static void IOcurl_abort_shutdown_callback(struct ev_loop *loop,
+                                          ev_cleanup *watcher,
+                                          int revents)
 {
-        CURLMcode msta;
+       CURLMcode msta;
        AsyncIO *IO = watcher->data;
-       EV_syslog(LOG_DEBUG, "EVENT Curl: %s\n", __FUNCTION__);
+
+       if (IO == NULL)
+               return;
+       IO->Now = ev_now(event_base);
+       EVCURL_syslog(LOG_DEBUG, "EVENT Curl: %s\n", __FUNCTION__);
 
        curl_slist_free_all(IO->HttpReq.headers);
        msta = curl_multi_remove_handle(global.mhnd, IO->HttpReq.chnd);
        if (msta)
-               EV_syslog(LOG_ERR, "EVCURL: warning problem detaching completed handle from curl multi: %s\n", curl_multi_strerror(msta));
-       
+       {
+               EVCURL_syslog(LOG_ERR,
+                             "EVCURL: warning problem detaching completed handle "
+                             "from curl multi: %s\n",
+                             curl_multi_strerror(msta));
+       }
+
        curl_easy_cleanup(IO->HttpReq.chnd);
        IO->HttpReq.chnd = NULL;
        ev_cleanup_stop(event_base, &IO->abort_by_shutdown);
@@ -433,25 +517,59 @@ static void IOcurl_abort_shutdown_callback(struct ev_loop *loop, ev_cleanup *wat
        IO->ShutdownAbort(IO);
 }
 eNextState
-evcurl_handle_start(AsyncIO *IO) 
+evcurl_handle_start(AsyncIO *IO)
 {
        CURLMcode msta;
+       CURLcode sta;
+       CURL *chnd;
+
+       chnd = IO->HttpReq.chnd;
+       EVCURL_syslog(LOG_DEBUG,
+                 "EVCURL: Loading URL: %s\n", IO->ConnectMe->PlainUrl);
+       OPT(URL, IO->ConnectMe->PlainUrl);
+       if (StrLength(IO->ConnectMe->CurlCreds))
+       {
+               OPT(HTTPAUTH, (long)CURLAUTH_BASIC);
+               OPT(USERPWD, ChrPtr(IO->ConnectMe->CurlCreds));
+       }
+       if (StrLength(IO->HttpReq.PostData) > 0)
+       {
+               OPT(POSTFIELDS, ChrPtr(IO->HttpReq.PostData));
+               OPT(POSTFIELDSIZE, StrLength(IO->HttpReq.PostData));
+
+       }
+       else if ((IO->HttpReq.PlainPostDataLen != 0) &&
+                (IO->HttpReq.PlainPostData != NULL))
+       {
+               OPT(POSTFIELDS, IO->HttpReq.PlainPostData);
+               OPT(POSTFIELDSIZE, IO->HttpReq.PlainPostDataLen);
+       }
+       OPT(HTTPHEADER, IO->HttpReq.headers);
+
        IO->NextState = eConnect;
-       EVM_syslog(LOG_DEBUG, "EVCURL: attaching to curl multi handle\n");
+       EVCURLM_syslog(LOG_DEBUG, "EVCURL: attaching to curl multi handle\n");
        msta = curl_multi_add_handle(global.mhnd, IO->HttpReq.chnd);
        if (msta)
-               EV_syslog(LOG_ERR, "EVCURL: error attaching to curl multi handle: %s\n", curl_multi_strerror(msta));
+       {
+               EVCURL_syslog(LOG_ERR,
+                         "EVCURL: error attaching to curl multi handle: %s\n",
+                         curl_multi_strerror(msta));
+       }
+
        IO->HttpReq.attached = 1;
        ev_async_send (event_base, &WakeupCurl);
-       ev_cleanup_init(&IO->abort_by_shutdown, 
+
+       ev_cleanup_init(&IO->abort_by_shutdown,
                        IOcurl_abort_shutdown_callback);
+
        ev_cleanup_start(event_base, &IO->abort_by_shutdown);
+
        return eReadMessage;
 }
 
 static void WakeupCurlCallback(EV_P_ ev_async *w, int revents)
 {
-       syslog(LOG_DEBUG, "EVCURL: waking up curl multi handle\n");
+       CURLM_syslog(LOG_DEBUG, "waking up curl multi handle\n");
 
        curl_multi_perform(&global, CURL_POLL_NONE);
 }
@@ -460,7 +578,7 @@ static void evcurl_shutdown (void)
 {
        curl_global_cleanup();
        curl_multi_cleanup(global.mhnd);
-       syslog(LOG_DEBUG, "client_event_thread() initializing\n");
+       CURLM_syslog(LOG_DEBUG, "exiting\n");
 }
 /*****************************************************************************
  *                       libevent integration                                *
@@ -470,20 +588,21 @@ static void evcurl_shutdown (void)
  * this currently is the main loop (which may change in some future?)
  */
 int evbase_count = 0;
-int event_add_pipe[2] = {-1, -1};
 pthread_mutex_t EventQueueMutex; /* locks the access to the following vars: */
+pthread_mutex_t EventExitQueueMutex; /* locks the access to the event queue pointer on exit. */
 HashList *QueueEvents = NULL;
 HashList *InboundEventQueue = NULL;
 HashList *InboundEventQueues[2] = { NULL, NULL };
 
-ev_async AddJob;   
+ev_async AddJob;
 ev_async ExitEventLoop;
 
 static void QueueEventAddCallback(EV_P_ ev_async *w, int revents)
 {
+       ev_tstamp Now;
        HashList *q;
        void *v;
-       HashPos  *It;
+       HashPos*It;
        long len;
        const char *Key;
 
@@ -499,18 +618,23 @@ static void QueueEventAddCallback(EV_P_ ev_async *w, int revents)
                q = InboundEventQueues[1];
        }
        pthread_mutex_unlock(&EventQueueMutex);
-
+       Now = ev_now (event_base);
        It = GetNewHashPos(q, 0);
        while (GetNextHashPos(q, It, &len, &Key, &v))
        {
                IOAddHandler *h = v;
-               if (h->IO->ID == 0)
+               if (h->IO->ID == 0) {
                        h->IO->ID = EvIDSource++;
+               }
+               if (h->IO->StartIO == 0.0)
+                       h->IO->StartIO = Now;
+
+               h->IO->Now = Now;
                h->EvAttch(h->IO);
        }
        DeleteHashPos(&It);
        DeleteHashContent(&q);
-       syslog(LOG_DEBUG, "EVENT Q Add done.\n");
+       EVQM_syslog(LOG_DEBUG, "EVENT Q Add done.\n");
 }
 
 
@@ -518,34 +642,26 @@ static void EventExitCallback(EV_P_ ev_async *w, int revents)
 {
        ev_break(event_base, EVBREAK_ALL);
 
-       syslog(LOG_DEBUG, "EVENT Q exiting.\n");
+       EVQM_syslog(LOG_DEBUG, "EVENT Q exiting.\n");
 }
 
 
 
 void InitEventQueue(void)
 {
-       struct rlimit LimitSet;
-
        pthread_mutex_init(&EventQueueMutex, NULL);
-
-       if (pipe(event_add_pipe) != 0) {
-               syslog(LOG_EMERG, "Unable to create pipe for libev queueing: %s\n", strerror(errno));
-               abort();
-       }
-       LimitSet.rlim_cur = 1;
-       LimitSet.rlim_max = 1;
-       setrlimit(event_add_pipe[1], &LimitSet);
+       pthread_mutex_init(&EventExitQueueMutex, NULL);
 
        QueueEvents = NewHash(1, Flathash);
        InboundEventQueues[0] = NewHash(1, Flathash);
        InboundEventQueues[1] = NewHash(1, Flathash);
        InboundEventQueue = InboundEventQueues[0];
 }
+extern void CtdlDestroyEVCleanupHooks(void);
+
+extern int EVQShutDown;
 /*
  * this thread operates the select() etc. via libev.
- * 
- * 
  */
 void *client_event_thread(void *arg) 
 {
@@ -553,7 +669,7 @@ void *client_event_thread(void *arg)
 
        CtdlFillSystemContext(&libev_client_CC, "LibEv Thread");
 //     citthread_setspecific(MyConKey, (void *)&smtp_queue_CC);
-       syslog(LOG_DEBUG, "client_event_thread() initializing\n");
+       EVQM_syslog(LOG_DEBUG, "client_event_thread() initializing\n");
 
        event_base = ev_default_loop (EVFLAG_AUTO);
        ev_async_init(&AddJob, QueueEventAddCallback);
@@ -567,10 +683,12 @@ void *client_event_thread(void *arg)
 
        ev_run (event_base, 0);
 
-       syslog(LOG_DEBUG, "client_event_thread() exiting\n");
+       EVQM_syslog(LOG_DEBUG, "client_event_thread() exiting\n");
 
 ///what todo here?     CtdlClearSystemContext();
+       pthread_mutex_lock(&EventExitQueueMutex);
        ev_loop_destroy (EV_DEFAULT_UC);
+       event_base = NULL;
        DeleteHash(&QueueEvents);
        InboundEventQueue = NULL;
        DeleteHash(&InboundEventQueues[0]);
@@ -578,31 +696,37 @@ void *client_event_thread(void *arg)
 /*     citthread_mutex_destroy(&EventQueueMutex); TODO */
        evcurl_shutdown();
 
+       CtdlDestroyEVCleanupHooks();
+
+       pthread_mutex_unlock(&EventExitQueueMutex);
+       EVQShutDown = 1;
        return(NULL);
 }
-/*------------------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------------*/
 /*
  * DB-Queue; does async bdb operations.
  * has its own set of handlers.
  */
 ev_loop *event_db;
 int evdb_count = 0;
-int evdb_add_pipe[2] = {-1, -1};
 pthread_mutex_t DBEventQueueMutex; /* locks the access to the following vars: */
+pthread_mutex_t DBEventExitQueueMutex; /* locks the access to the db-event queue pointer on exit. */
 HashList *DBQueueEvents = NULL;
 HashList *DBInboundEventQueue = NULL;
 HashList *DBInboundEventQueues[2] = { NULL, NULL };
 
-ev_async DBAddJob;   
+ev_async DBAddJob;
 ev_async DBExitEventLoop;
 
 extern void ShutDownDBCLient(AsyncIO *IO);
 
 static void DBQueueEventAddCallback(EV_P_ ev_async *w, int revents)
 {
+       ev_tstamp Now;
        HashList *q;
        void *v;
-       HashPos  *It;
+       HashPos *It;
        long len;
        const char *Key;
 
@@ -619,6 +743,7 @@ static void DBQueueEventAddCallback(EV_P_ ev_async *w, int revents)
        }
        pthread_mutex_unlock(&DBEventQueueMutex);
 
+       Now = ev_now (event_db);
        It = GetNewHashPos(q, 0);
        while (GetNextHashPos(q, It, &len, &Key, &v))
        {
@@ -626,24 +751,28 @@ static void DBQueueEventAddCallback(EV_P_ ev_async *w, int revents)
                eNextState rc;
                if (h->IO->ID == 0)
                        h->IO->ID = EvIDSource++;
+               if (h->IO->StartDB == 0.0)
+                       h->IO->StartDB = Now;
+               h->IO->Now = Now;
+               ev_cleanup_start(event_db, &h->IO->db_abort_by_shutdown);
                rc = h->EvAttch(h->IO);
                switch (rc)
                {
                case eAbort:
-                   ShutDownDBCLient(h->IO);
+                       ShutDownDBCLient(h->IO);
                default:
-                   break;
+                       break;
                }
        }
        DeleteHashPos(&It);
        DeleteHashContent(&q);
-       syslog(LOG_DEBUG, "DBEVENT Q Add done.\n");
+       EVQM_syslog(LOG_DEBUG, "DBEVENT Q Add done.\n");
 }
 
 
 static void DBEventExitCallback(EV_P_ ev_async *w, int revents)
 {
-       syslog(LOG_DEBUG, "DB EVENT Q exiting.\n");
+       EVQM_syslog(LOG_DEBUG, "DB EVENT Q exiting.\n");
        ev_break(event_db, EVBREAK_ALL);
 }
 
@@ -651,17 +780,8 @@ static void DBEventExitCallback(EV_P_ ev_async *w, int revents)
 
 void DBInitEventQueue(void)
 {
-       struct rlimit LimitSet;
-
        pthread_mutex_init(&DBEventQueueMutex, NULL);
-
-       if (pipe(evdb_add_pipe) != 0) {
-               syslog(LOG_EMERG, "Unable to create pipe for libev queueing: %s\n", strerror(errno));
-               abort();
-       }
-       LimitSet.rlim_cur = 1;
-       LimitSet.rlim_max = 1;
-       setrlimit(evdb_add_pipe[1], &LimitSet);
+       pthread_mutex_init(&DBEventExitQueueMutex, NULL);
 
        DBQueueEvents = NewHash(1, Flathash);
        DBInboundEventQueues[0] = NewHash(1, Flathash);
@@ -671,18 +791,17 @@ void DBInitEventQueue(void)
 
 /*
  * this thread operates writing to the message database via libev.
- * 
- * 
  */
-void *db_event_thread(void *arg) 
+void *db_event_thread(void *arg)
 {
+       ev_loop *tmp;
        struct CitContext libev_msg_CC;
 
        CtdlFillSystemContext(&libev_msg_CC, "LibEv DB IO Thread");
-//     citthread_setspecific(MyConKey, (void *)&smtp_queue_CC);
-       syslog(LOG_DEBUG, "dbevent_thread() initializing\n");
 
-       event_db = ev_loop_new (EVFLAG_AUTO);
+       EVQM_syslog(LOG_DEBUG, "dbevent_thread() initializing\n");
+
+       tmp = event_db = ev_loop_new (EVFLAG_AUTO);
 
        ev_async_init(&DBAddJob, DBQueueEventAddCallback);
        ev_async_start(event_db, &DBAddJob);
@@ -691,23 +810,26 @@ void *db_event_thread(void *arg)
 
        ev_run (event_db, 0);
 
-       syslog(LOG_DEBUG, "dbevent_thread() exiting\n");
+       pthread_mutex_lock(&DBEventExitQueueMutex);
 
-//// what to do here?  CtdlClearSystemContext();
-       ev_loop_destroy (event_db);
+       event_db = NULL;
+       EVQM_syslog(LOG_INFO, "dbevent_thread() exiting\n");
 
        DeleteHash(&DBQueueEvents);
        DBInboundEventQueue = NULL;
        DeleteHash(&DBInboundEventQueues[0]);
        DeleteHash(&DBInboundEventQueues[1]);
+
 /*     citthread_mutex_destroy(&DBEventQueueMutex); TODO */
 
+       ev_loop_destroy (tmp);
+       pthread_mutex_unlock(&DBEventExitQueueMutex);
        return(NULL);
 }
 
 void ShutDownEventQueues(void)
 {
-       syslog(LOG_DEBUG, "EVENT Qs triggering exits.\n");
+       EVQM_syslog(LOG_DEBUG, "EVENT Qs triggering exits.\n");
 
        pthread_mutex_lock(&DBEventQueueMutex);
        ev_async_send (event_db, &DBExitEventLoop);
@@ -718,16 +840,31 @@ void ShutDownEventQueues(void)
        pthread_mutex_unlock(&EventQueueMutex);
 }
 
+void DebugEventloopEnable(const int n)
+{
+       DebugEventLoop = n;
+}
+void DebugEventloopBacktraceEnable(const int n)
+{
+       DebugEventLoopBacktrace = n;
+}
+
+void DebugCurlEnable(const int n)
+{
+       DebugCurl = n;
+}
+
 CTDL_MODULE_INIT(event_client)
 {
        if (!threading)
        {
-               CtdlRegisterCleanupHook(ShutDownEventQueues);
+               CtdlRegisterDebugFlagHook(HKEY("eventloop"), DebugEventloopEnable, &DebugEventLoop);
+               CtdlRegisterDebugFlagHook(HKEY("eventloopbacktrace"), DebugEventloopBacktraceEnable, &DebugEventLoopBacktrace);
+               CtdlRegisterDebugFlagHook(HKEY("curl"), DebugCurlEnable, &DebugCurl);
                InitEventQueue();
                DBInitEventQueue();
-               CtdlThreadCreate(/*"Client event", */ client_event_thread);
-               CtdlThreadCreate(/*"DB event", */db_event_thread);
-/// todo register shutdown callback.
+               CtdlThreadCreate(client_event_thread);
+               CtdlThreadCreate(db_event_thread);
        }
        return "event";
 }