--- deliantra/server/common/logger.C	2009/10/12 14:00:57	1.20
+++ deliantra/server/common/logger.C	2016/11/16 23:41:59	1.30
@@ -1,24 +1,22 @@
 /*
  * This file is part of Deliantra, the Roguelike Realtime MMORPG.
- * 
- * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
- * Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
- * Copyright (©) 1992,2007 Frank Tore Johansen
- * 
+ *
+ * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
+ *
  * Deliantra is free software: you can redistribute it and/or modify it under
  * the terms of the Affero 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 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 Affero GNU General Public License
  * and the GNU General Public License along with this program. If not, see
  * <http://www.gnu.org/licenses/>.
- * 
+ *
  * The authors can be reached via e-mail to <support@deliantra.net>
  */
 
@@ -42,37 +40,45 @@
   int flags;
 };
 
+typedef std::vector<logline, slice_allocator<logline> > logvector;
+
 static SMUTEX(mutex);
+static SMUTEX(fdlock);
 static SCOND(cond);
 static int logfd = STDERR_FILENO;
 static int logsync = 1;
-static std::vector<logline, slice_allocator<logline> > queue;
+static logvector queue;
 
-void set_logfd (int fd)
+int log_setfd (int fd)
 {
-  SMUTEX_LOCK (mutex);
+  SMUTEX_LOCK (fdlock);
+  int old = logfd;
   logfd = fd < 0 ? STDERR_FILENO : fd;
-  SMUTEX_UNLOCK (mutex);
+  SMUTEX_UNLOCK (fdlock);
+
+  return old;
 }
 
-#define PREFIX_LEN sizeof ("0000-00-00 00:00:00.0000+") - 1
+#define PREFIX_LEN sizeof ("0000-00-00 00:00:00.0000 L+") - 1
 
 static void
 log_sync (logline &line)
 {
+  static const char levelchar [16+1] = "EWIDt???????????";
   struct tm lt;
   char pfx [PREFIX_LEN];
 
   localtime_r (&line.tv.tv_sec, &lt);
 
-  sprintf (pfx, "%04d-%02d-%02d %02d:%02d:%02d.%04d",
+  sprintf (pfx, "%04d-%02d-%02d %02d:%02d:%02d.%04d %c",
     lt.tm_year + 1900,
     lt.tm_mon + 1,
     lt.tm_mday,
     lt.tm_hour,
     lt.tm_min,
     lt.tm_sec,
-    (int)(line.tv.tv_usec / 100)
+    (int)(line.tv.tv_usec / 100),
+    levelchar [line.flags & 15]
   );
 
   pfx [PREFIX_LEN - 1] = line.flags & logSync ? '=' : ' ';
@@ -84,6 +90,9 @@
 
   char *buf = line.buf;
 
+  if (logsync != 2)
+    SMUTEX_LOCK (fdlock);
+
   while (char *end = strchr (buf, '\n'))
     {
       iov [1].iov_base = buf;
@@ -101,6 +110,9 @@
       pfx [PREFIX_LEN - 1] = '+';
     }
 
+  if (logsync != 2)
+    SMUTEX_UNLOCK (fdlock);
+
   sfree (line.buf, line.len);
 }
 
@@ -125,7 +137,11 @@
       // we have bigger problems.
       if (idx == queue.size ())
         {
-          queue.clear ();
+          if (idx < 32)
+            queue.clear ();
+          else
+            logvector ().swap (queue); // free memory, hopefully
+
           idx = 0;
         }
 
@@ -139,6 +155,7 @@
 log_cleanup ()
 {
   logsync = 1;
+  SMUTEX_UNLOCK (fdlock);
 
   for (;;)
     {
@@ -152,13 +169,15 @@
         break;
 
       usleep (10000);
+      SMUTEX_LOCK (fdlock);
+      SMUTEX_UNLOCK (fdlock);
     }
 }
 
 static void
 af_child ()
 {
-  logsync = 1;
+  logsync = 2;
 }
 
 static struct logthread : thread
@@ -172,7 +191,7 @@
 } logthread;
 
 void
-LOG (int flags, const char *format, ...)
+LOG (int flags, const_utf8_string format, ...)
 {
   int level = flags & 15;
 
@@ -224,3 +243,25 @@
     }
 }
 
+static int suspended;
+
+void
+log_suspend ()
+{
+  if (!suspended++)
+    {
+      LOG (llevDebug, "logging suspended.");
+      SMUTEX_LOCK (fdlock);
+    }
+}
+
+void
+log_resume ()
+{
+  if (!--suspended)
+    {
+      SMUTEX_UNLOCK (fdlock);
+      LOG (llevDebug, "logging resumed.");
+    }
+}
+