# HG changeset patch
# User Michael Hendricks <michael@ndrix.org>
# Date 1330716278 25200
# Node ID bf012cfbf48955365519d44b1f503e6e178d0e70
# Parent  d46f72be1f10f5c3913db87158726ac5e14b1593
Serialize access to debug.log stream

Acquire an exclusive, advisory lock before sending output to debug.log
and release it when we're done. This should avoid output from multiple
threads being interspersed in the log file.

We can't use CRITICAL_SECTION machinery for this because the debug log
is written during startup and shutdown when that machinery is not
available.

(Thanks to Gavin for pointing out the CRITICAL_SECTION problems based
on his earlier work in this area)

diff --git a/src/util.cpp b/src/util.cpp
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -22,6 +22,7 @@
 #include <boost/interprocess/sync/interprocess_mutex.hpp>
 #include <boost/interprocess/sync/interprocess_recursive_mutex.hpp>
 #include <boost/foreach.hpp>
+#include <boost/thread.hpp>
 
 using namespace std;
 using namespace boost;
@@ -193,6 +194,8 @@
         if (fileout)
         {
             static bool fStartedNewLine = true;
+            static boost::mutex mutexDebugLog;
+            boost::mutex::scoped_lock scoped_lock(mutexDebugLog);
 
             // Debug print useful for profiling
             if (fLogTimestamps && fStartedNewLine)