Moved work for isue 532 into it's own branch.

Foundation/include/Poco/Mutex_WIN32.h

@@ -43,7 +43,20 @@ private:
 };
 
 
-typedef MutexImpl FastMutexImpl;
+class Foundation_API FastMutexImpl
+{
+protected:
+	FastMutexImpl();
+	~FastMutexImpl();
+	void lockImpl();
+	bool tryLockImpl();
+	bool tryLockImpl(long milliseconds);
+	void unlockImpl();
+	
+private:
+	CRITICAL_SECTION _cs;
+	int _lockCount;
+};
 
 
 //
@@ -81,6 +94,13 @@ inline void MutexImpl::unlockImpl()
 }
 
 
+inline void FastMutexImpl::unlockImpl()
+{
+	--_lockCount;
+	LeaveCriticalSection(&_cs);
+}
+
+
 } // namespace Poco
 
 

Foundation/src/Mutex_WIN32.cpp

@@ -15,6 +15,7 @@
 
 
 #include "Poco/Mutex_WIN32.h"
+#include "Poco/Thread.h"
 #include "Poco/Timestamp.h"
 
 
@@ -58,4 +59,97 @@ bool MutexImpl::tryLockImpl(long milliseconds)
 }
 
 
+FastMutexImpl::FastMutexImpl()
+	: _lockCount(0)
+{
+	// the fct has a boolean return value under WInnNt/2000/XP but not on Win98
+	// the return only checks if the input address of &_cs was valid, so it is safe to omit it
+	InitializeCriticalSectionAndSpinCount(&_cs, 4000);
+}
+
+
+FastMutexImpl::~FastMutexImpl()
+{
+	DeleteCriticalSection(&_cs);
+}
+
+
+void FastMutexImpl::lockImpl()
+{
+	try
+	{
+		EnterCriticalSection(&_cs);
+		++_lockCount;
+
+		if (_lockCount > 1)
+		{
+			// We're trying to go recursive so self-deadlock
+			Thread::current()->join();
+		}
+	}
+	catch (...)
+	{
+		throw SystemException("cannot lock mutex");
+	}
+}
+
+
+bool FastMutexImpl::tryLockImpl()
+{
+	try
+	{
+		if (TryEnterCriticalSection(&_cs) == 0)
+			return false;
+
+		if (_lockCount > 0)
+		{
+			// We're trying to go recursive
+			LeaveCriticalSection(&_cs);
+			return false;
+		}
+		
+		++_lockCount;
+		return true;
+	}
+	catch (...)
+	{
+	}
+	throw SystemException("cannot lock mutex");
+}
+
+
+bool FastMutexImpl::tryLockImpl(long milliseconds)
+{
+	const int sleepMillis = 5;
+	Timestamp now;
+	Timestamp::TimeDiff diff(Timestamp::TimeDiff(milliseconds)*1000);
+
+	do
+	{
+		try
+		{
+			if (TryEnterCriticalSection(&_cs) == TRUE)
+			{
+				if (_lockCount == 0)
+				{
+					++_lockCount;
+					return true;
+				}
+
+				// We're trying to go recursive
+				LeaveCriticalSection(&_cs);
+				Sleep(milliseconds);
+				return false;
+			}
+		}
+		catch (...)
+		{
+			throw SystemException("cannot lock mutex");
+		}
+		Sleep(sleepMillis);
+	} while (!now.isElapsed(diff));
+	return false;
+}
+
+
 } // namespace Poco

Foundation/testsuite/Makefile-Driver

@@ -24,7 +24,7 @@ objects = ActiveMethodTest ActivityTest ActiveDispatcherTest \
 	NotificationsTestSuite NullStreamTest NumberFormatterTest \
 	NumberParserTest PathTest PatternFormatterTest PBKDF2EngineTest RWLockTest \
 	RandomStreamTest RandomTest RegularExpressionTest SHA1EngineTest \
-	SemaphoreTest ConditionTest SharedLibraryTest SharedLibraryTestSuite \
+	SemaphoreTest MutexTest ConditionTest SharedLibraryTest SharedLibraryTestSuite \
 	SimpleFileChannelTest StopwatchTest \
 	StreamConverterTest StreamCopierTest StreamTokenizerTest \
 	StreamsTestSuite StringTest StringTokenizerTest TaskTestSuite TaskTest \

Foundation/testsuite/TestSuite.vxbuild

@@ -66,6 +66,7 @@ SOURCES="
 	ManifestTest.cpp
 	MemoryPoolTest.cpp
 	MemoryStreamTest.cpp
+	MutexTest.cpp
 	NDCTest.cpp
 	NotificationCenterTest.cpp
 	NotificationQueueTest.cpp

Foundation/testsuite/TestSuite_CE_vs90.vcproj

@@ -1074,6 +1074,10 @@
 					RelativePath=".\src\ConditionTest.cpp"
 					>
 				</File>
+				<File
+					RelativePath=".\src\MutexTest.cpp"
+					>
+				</File>
 				<File
 					RelativePath=".\src\RWLockTest.cpp"
 					>
@@ -1122,6 +1126,10 @@
 					RelativePath=".\src\ConditionTest.h"
 					>
 				</File>
+				<File
+					RelativePath=".\src\MutexTest.h"
+					>
+				</File>
 				<File
 					RelativePath=".\src\RWLockTest.h"
 					>

Foundation/testsuite/TestSuite_WEC2013_vs110.vcxproj

@@ -340,6 +340,7 @@
     <ClCompile Include="src\ActiveMethodTest.cpp" />
     <ClCompile Include="src\ActivityTest.cpp" />
     <ClCompile Include="src\ConditionTest.cpp" />
+    <ClCompile Include="src\MutexTest.cpp" />
     <ClCompile Include="src\RWLockTest.cpp" />
     <ClCompile Include="src\SemaphoreTest.cpp" />
     <ClCompile Include="src\ThreadingTestSuite.cpp" />
@@ -477,6 +478,7 @@
     <ClInclude Include="src\ActiveMethodTest.h" />
     <ClInclude Include="src\ActivityTest.h" />
     <ClInclude Include="src\ConditionTest.h" />
+    <ClInclude Include="src\MutexTest.h" />
     <ClInclude Include="src\RWLockTest.h" />
     <ClInclude Include="src\SemaphoreTest.h" />
     <ClInclude Include="src\ThreadingTestSuite.h" />

Foundation/testsuite/TestSuite_WEC2013_vs110.vcxproj.filters

@@ -336,6 +336,9 @@
     <ClCompile Include="src\ConditionTest.cpp">
       <Filter>Threading\Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="src\MutexTest.cpp">
+      <Filter>Threading\Source Files</Filter>
+    </ClCompile>
     <ClCompile Include="src\RWLockTest.cpp">
       <Filter>Threading\Source Files</Filter>
     </ClCompile>
@@ -746,6 +749,9 @@
     <ClInclude Include="src\ConditionTest.h">
       <Filter>Threading\Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="src\MutexTest.h">
+      <Filter>Threading\Header Files</Filter>
+    </ClInclude>
     <ClInclude Include="src\RWLockTest.h">
       <Filter>Threading\Header Files</Filter>
     </ClInclude>

Foundation/testsuite/TestSuite_WEC2013_vs120.vcxproj

@@ -343,6 +343,7 @@
     <ClCompile Include="src\ActiveMethodTest.cpp" />
     <ClCompile Include="src\ActivityTest.cpp" />
     <ClCompile Include="src\ConditionTest.cpp" />
+    <ClCompile Include="src\MutexTest.cpp" />
     <ClCompile Include="src\RWLockTest.cpp" />
     <ClCompile Include="src\SemaphoreTest.cpp" />
     <ClCompile Include="src\ThreadingTestSuite.cpp" />
@@ -480,6 +481,7 @@
     <ClInclude Include="src\ActiveMethodTest.h" />
     <ClInclude Include="src\ActivityTest.h" />
     <ClInclude Include="src\ConditionTest.h" />
+    <ClInclude Include="src\MutexTest.h" />
     <ClInclude Include="src\RWLockTest.h" />
     <ClInclude Include="src\SemaphoreTest.h" />
     <ClInclude Include="src\ThreadingTestSuite.h" />

Foundation/testsuite/TestSuite_WEC2013_vs120.vcxproj.filters

@@ -336,6 +336,9 @@
     <ClCompile Include="src\ConditionTest.cpp">
       <Filter>Threading\Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="src\MutexTest.cpp">
+      <Filter>Threading\Source Files</Filter>
+    </ClCompile>
     <ClCompile Include="src\RWLockTest.cpp">
       <Filter>Threading\Source Files</Filter>
     </ClCompile>
@@ -746,6 +749,9 @@
     <ClInclude Include="src\ConditionTest.h">
       <Filter>Threading\Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="src\MutexTest.h">
+      <Filter>Threading\Header Files</Filter>
+    </ClInclude>
     <ClInclude Include="src\RWLockTest.h">
       <Filter>Threading\Header Files</Filter>
     </ClInclude>

Foundation/testsuite/TestSuite_vs100.vcxproj

@@ -360,6 +360,7 @@
     <ClCompile Include="src\ActiveMethodTest.cpp" />
     <ClCompile Include="src\ActivityTest.cpp" />
     <ClCompile Include="src\ConditionTest.cpp" />
+    <ClCompile Include="src\MutexTest.cpp" />
     <ClCompile Include="src\RWLockTest.cpp" />
     <ClCompile Include="src\SemaphoreTest.cpp" />
     <ClCompile Include="src\ThreadingTestSuite.cpp" />
@@ -498,6 +499,7 @@
     <ClInclude Include="src\ActiveMethodTest.h" />
     <ClInclude Include="src\ActivityTest.h" />
     <ClInclude Include="src\ConditionTest.h" />
+    <ClInclude Include="src\MutexTest.h" />
     <ClInclude Include="src\RWLockTest.h" />
     <ClInclude Include="src\SemaphoreTest.h" />
     <ClInclude Include="src\ThreadingTestSuite.h" />

Foundation/testsuite/TestSuite_vs100.vcxproj.filters

@@ -330,6 +330,9 @@
     <ClCompile Include="src\ConditionTest.cpp">
       <Filter>Threading\Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="src\MutexTest.cpp">
+      <Filter>Threading\Source Files</Filter>
+    </ClCompile>
     <ClCompile Include="src\RWLockTest.cpp">
       <Filter>Threading\Source Files</Filter>
     </ClCompile>
@@ -740,6 +743,9 @@
     <ClInclude Include="src\ConditionTest.h">
       <Filter>Threading\Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="src\MutexTest.h">
+      <Filter>Threading\Header Files</Filter>
+    </ClInclude>
     <ClInclude Include="src\RWLockTest.h">
       <Filter>Threading\Header Files</Filter>
     </ClInclude>

Foundation/testsuite/TestSuite_vs110.vcxproj

@@ -365,6 +365,7 @@
     <ClCompile Include="src\ActiveMethodTest.cpp" />
     <ClCompile Include="src\ActivityTest.cpp" />
     <ClCompile Include="src\ConditionTest.cpp" />
+    <ClCompile Include="src\MutexTest.cpp" />
     <ClCompile Include="src\RWLockTest.cpp" />
     <ClCompile Include="src\SemaphoreTest.cpp" />
     <ClCompile Include="src\ThreadingTestSuite.cpp" />
@@ -503,6 +504,7 @@
     <ClInclude Include="src\ActiveMethodTest.h" />
     <ClInclude Include="src\ActivityTest.h" />
     <ClInclude Include="src\ConditionTest.h" />
+    <ClInclude Include="src\MutexTest.h" />
     <ClInclude Include="src\RWLockTest.h" />
     <ClInclude Include="src\SemaphoreTest.h" />
     <ClInclude Include="src\ThreadingTestSuite.h" />

Foundation/testsuite/TestSuite_vs110.vcxproj.filters

@@ -336,6 +336,9 @@
     <ClCompile Include="src\ConditionTest.cpp">
       <Filter>Threading\Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="src\MutexTest.cpp">
+      <Filter>Threading\Source Files</Filter>
+    </ClCompile>
     <ClCompile Include="src\RWLockTest.cpp">
       <Filter>Threading\Source Files</Filter>
     </ClCompile>
@@ -746,6 +749,9 @@
     <ClInclude Include="src\ConditionTest.h">
       <Filter>Threading\Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="src\MutexTest.h">
+      <Filter>Threading\Header Files</Filter>
+    </ClInclude>
     <ClInclude Include="src\RWLockTest.h">
       <Filter>Threading\Header Files</Filter>
     </ClInclude>

Foundation/testsuite/TestSuite_vs120.vcxproj

@@ -388,6 +388,7 @@
     <ClCompile Include="src\ActiveMethodTest.cpp" />
     <ClCompile Include="src\ActivityTest.cpp" />
     <ClCompile Include="src\ConditionTest.cpp" />
+    <ClCompile Include="src\MutexTest.cpp" />
     <ClCompile Include="src\RWLockTest.cpp" />
     <ClCompile Include="src\SemaphoreTest.cpp" />
     <ClCompile Include="src\ThreadingTestSuite.cpp" />
@@ -525,6 +526,7 @@
     <ClInclude Include="src\ActiveMethodTest.h" />
     <ClInclude Include="src\ActivityTest.h" />
     <ClInclude Include="src\ConditionTest.h" />
+    <ClInclude Include="src\MutexTest.h" />
     <ClInclude Include="src\RWLockTest.h" />
     <ClInclude Include="src\SemaphoreTest.h" />
     <ClInclude Include="src\ThreadingTestSuite.h" />

Foundation/testsuite/TestSuite_vs120.vcxproj.filters

@@ -336,6 +336,9 @@
     <ClCompile Include="src\ConditionTest.cpp">
       <Filter>Threading\Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="src\MutexTest.cpp">
+      <Filter>Threading\Source Files</Filter>
+    </ClCompile>
     <ClCompile Include="src\RWLockTest.cpp">
       <Filter>Threading\Source Files</Filter>
     </ClCompile>
@@ -743,6 +746,9 @@
     <ClInclude Include="src\ConditionTest.h">
       <Filter>Threading\Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="src\MutexTest.h">
+      <Filter>Threading\Header Files</Filter>
+    </ClInclude>
     <ClInclude Include="src\RWLockTest.h">
       <Filter>Threading\Header Files</Filter>
     </ClInclude>

Foundation/testsuite/TestSuite_vs71.vcproj

@@ -775,6 +775,9 @@
 				<File
 					RelativePath=".\src\ConditionTest.cpp">
 				</File>
+				<File
+					RelativePath=".\src\MutexTest.cpp">
+				</File>
 				<File
 					RelativePath=".\src\RWLockTest.cpp">
 				</File>
@@ -812,6 +815,9 @@
 				<File
 					RelativePath=".\src\ConditionTest.h">
 				</File>
+				<File
+					RelativePath=".\src\MutexTest.h">
+				</File>
 				<File
 					RelativePath=".\src\RWLockTest.h">
 				</File>

Foundation/testsuite/TestSuite_vs80.vcproj

@@ -1043,6 +1043,10 @@
 					RelativePath=".\src\ConditionTest.cpp"
 					>
 				</File>
+				<File
+					RelativePath=".\src\MutexTest.cpp"
+					>
+				</File>
 				<File
 					RelativePath=".\src\RWLockTest.cpp"
 					>
@@ -1091,6 +1095,10 @@
 					RelativePath=".\src\ConditionTest.h"
 					>
 				</File>
+				<File
+					RelativePath=".\src\MutexTest.h"
+					>
+				</File>
 				<File
 					RelativePath=".\src\RWLockTest.h"
 					>

Foundation/testsuite/TestSuite_vs90.vcproj

@@ -1029,6 +1029,10 @@
 					RelativePath=".\src\ConditionTest.cpp"
 					>
 				</File>
+				<File
+					RelativePath=".\src\MutexTest.cpp"
+					>
+				</File>
 				<File
 					RelativePath=".\src\RWLockTest.cpp"
 					>
@@ -1077,6 +1081,10 @@
 					RelativePath=".\src\ConditionTest.h"
 					>
 				</File>
+				<File
+					RelativePath=".\src\MutexTest.h"
+					>
+				</File>
 				<File
 					RelativePath=".\src\RWLockTest.h"
 					>

Foundation/testsuite/TestSuite_x64_vs100.vcxproj

@@ -359,6 +359,7 @@
     <ClCompile Include="src\ActiveMethodTest.cpp" />
     <ClCompile Include="src\ActivityTest.cpp" />
     <ClCompile Include="src\ConditionTest.cpp" />
+    <ClCompile Include="src\MutexTest.cpp" />
     <ClCompile Include="src\RWLockTest.cpp" />
     <ClCompile Include="src\SemaphoreTest.cpp" />
     <ClCompile Include="src\ThreadingTestSuite.cpp" />
@@ -498,6 +499,7 @@
     <ClInclude Include="src\ActiveMethodTest.h" />
     <ClInclude Include="src\ActivityTest.h" />
     <ClInclude Include="src\ConditionTest.h" />
+    <ClInclude Include="src\MutexTest.h" />
     <ClInclude Include="src\RWLockTest.h" />
     <ClInclude Include="src\SemaphoreTest.h" />
     <ClInclude Include="src\ThreadingTestSuite.h" />

Foundation/testsuite/TestSuite_x64_vs100.vcxproj.filters

@@ -339,6 +339,9 @@
     <ClCompile Include="src\ConditionTest.cpp">
       <Filter>Threading\Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="src\MutexTest.cpp">
+      <Filter>Threading\Source Files</Filter>
+    </ClCompile>
     <ClCompile Include="src\RWLockTest.cpp">
       <Filter>Threading\Source Files</Filter>
     </ClCompile>
@@ -752,6 +755,9 @@
     <ClInclude Include="src\ConditionTest.h">
       <Filter>Threading\Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="src\MutexTest.h">
+      <Filter>Threading\Header Files</Filter>
+    </ClInclude>
     <ClInclude Include="src\RWLockTest.h">
       <Filter>Threading\Header Files</Filter>
     </ClInclude>

Foundation/testsuite/TestSuite_x64_vs110.vcxproj

@@ -365,6 +365,7 @@
     <ClCompile Include="src\ActiveMethodTest.cpp" />
     <ClCompile Include="src\ActivityTest.cpp" />
     <ClCompile Include="src\ConditionTest.cpp" />
+    <ClCompile Include="src\MutexTest.cpp" />
     <ClCompile Include="src\RWLockTest.cpp" />
     <ClCompile Include="src\SemaphoreTest.cpp" />
     <ClCompile Include="src\ThreadingTestSuite.cpp" />
@@ -504,6 +505,7 @@
     <ClInclude Include="src\ActiveMethodTest.h" />
     <ClInclude Include="src\ActivityTest.h" />
     <ClInclude Include="src\ConditionTest.h" />
+    <ClInclude Include="src\MutexTest.h" />
     <ClInclude Include="src\RWLockTest.h" />
     <ClInclude Include="src\SemaphoreTest.h" />
     <ClInclude Include="src\ThreadingTestSuite.h" />

Foundation/testsuite/TestSuite_x64_vs110.vcxproj.filters

@@ -336,6 +336,9 @@
     <ClCompile Include="src\ConditionTest.cpp">
       <Filter>Threading\Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="src\MutexTest.cpp">
+      <Filter>Threading\Source Files</Filter>
+    </ClCompile>
     <ClCompile Include="src\RWLockTest.cpp">
       <Filter>Threading\Source Files</Filter>
     </ClCompile>
@@ -749,6 +752,9 @@
     <ClInclude Include="src\ConditionTest.h">
       <Filter>Threading\Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="src\MutexTest.h">
+      <Filter>Threading\Header Files</Filter>
+    </ClInclude>
     <ClInclude Include="src\RWLockTest.h">
       <Filter>Threading\Header Files</Filter>
     </ClInclude>

Foundation/testsuite/TestSuite_x64_vs120.vcxproj

@@ -372,6 +372,7 @@
     <ClCompile Include="src\ActiveMethodTest.cpp" />
     <ClCompile Include="src\ActivityTest.cpp" />
     <ClCompile Include="src\ConditionTest.cpp" />
+    <ClCompile Include="src\MutexTest.cpp" />
     <ClCompile Include="src\RWLockTest.cpp" />
     <ClCompile Include="src\SemaphoreTest.cpp" />
     <ClCompile Include="src\ThreadingTestSuite.cpp" />
@@ -510,6 +511,7 @@
     <ClInclude Include="src\ActiveMethodTest.h" />
     <ClInclude Include="src\ActivityTest.h" />
     <ClInclude Include="src\ConditionTest.h" />
+    <ClInclude Include="src\MutexTest.h" />
     <ClInclude Include="src\RWLockTest.h" />
     <ClInclude Include="src\SemaphoreTest.h" />
     <ClInclude Include="src\ThreadingTestSuite.h" />

Foundation/testsuite/TestSuite_x64_vs120.vcxproj.filters

@@ -336,6 +336,9 @@
     <ClCompile Include="src\ConditionTest.cpp">
       <Filter>Threading\Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="src\MutexTest.cpp">
+      <Filter>Threading\Source Files</Filter>
+    </ClCompile>
     <ClCompile Include="src\RWLockTest.cpp">
       <Filter>Threading\Source Files</Filter>
     </ClCompile>
@@ -749,6 +752,9 @@
     <ClInclude Include="src\ConditionTest.h">
       <Filter>Threading\Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="src\MutexTest.h">
+      <Filter>Threading\Header Files</Filter>
+    </ClInclude>
     <ClInclude Include="src\RWLockTest.h">
       <Filter>Threading\Header Files</Filter>
     </ClInclude>

Foundation/testsuite/TestSuite_x64_vs90.vcproj

@@ -1023,6 +1023,10 @@
 					RelativePath=".\src\ConditionTest.cpp"
 					>
 				</File>
+				<File
+					RelativePath=".\src\MutexTest.cpp"
+					>
+				</File>
 				<File
 					RelativePath=".\src\RWLockTest.cpp"
 					>
@@ -1071,6 +1075,10 @@
 					RelativePath=".\src\ConditionTest.h"
 					>
 				</File>
+				<File
+					RelativePath=".\src\MutexTest.h"
+					>
+				</File>
 				<File
 					RelativePath=".\src\RWLockTest.h"
 					>

Foundation/testsuite/src/MutexTest.cpp

@@ -0,0 +1,122 @@
+//
+// MutexTest.cpp
+//
+// $Id: //poco/1.4/Foundation/testsuite/src/MutexTest.cpp#1 $
+//
+// Copyright (c) 2007, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#include "MutexTest.h"
+#include "CppUnit/TestCaller.h"
+#include "CppUnit/TestSuite.h"
+#include "Poco/Exception.h"
+#include "Poco/Mutex.h"
+#include "Poco/Runnable.h"
+#include "Poco/Thread.h"
+#include "Poco/Timestamp.h"
+
+
+using Poco::FastMutex;
+using Poco::Runnable;
+using Poco::SystemException;
+using Poco::Thread;
+using Poco::Timestamp;
+
+namespace
+{
+	class SelfDeadlockRunnable: public Runnable
+	{
+	public:
+		SelfDeadlockRunnable():
+			_ran(false)
+		{
+		}
+		
+		void run()
+		{
+			try
+			{
+				FastMutex mtx;
+				mtx.lock();
+				mtx.lock();
+			}
+			catch (...)
+			{
+			}
+
+			_ran = true;
+		}
+		
+		bool ran() const
+		{
+			return _ran;
+		}
+			
+	private:
+		bool _ran;
+	};
+}
+
+
+MutexTest::MutexTest(const std::string& name): CppUnit::TestCase(name)
+{
+}
+
+
+MutexTest::~MutexTest()
+{
+}
+
+
+void MutexTest::testFastMutexRecursion()
+{
+	FastMutex mtx;
+	mtx.lock();
+	
+	bool success = mtx.tryLock();
+	assert (!success);
+	
+	Timestamp mark;
+	success = mtx.tryLock(2000); // Wait 2 seconds
+	assert (!success);
+
+	// Test that we waited approx. 2 sec
+	Timestamp::TimeDiff elapsed = mark.elapsed();
+	assert (elapsed > 1000000);
+	assert (elapsed < 3000000);
+	
+	success = mtx.tryLock(0);
+	assert (!success);
+
+	SelfDeadlockRunnable r;
+	Thread t;
+
+	t.start(r);
+	success = t.tryJoin(2000);
+	assert (!success);
+	assert (!r.ran());
+}
+
+
+void MutexTest::setUp()
+{
+}
+
+
+void MutexTest::tearDown()
+{
+}
+
+
+CppUnit::Test* MutexTest::suite()
+{
+	CppUnit::TestSuite* pSuite = new CppUnit::TestSuite("MutexTest");
+
+	CppUnit_addTest(pSuite, MutexTest, testFastMutexRecursion);
+
+	return pSuite;
+}

Foundation/testsuite/src/MutexTest.h

@@ -0,0 +1,40 @@
+//
+// MutexTest.h
+//
+// $Id: //poco/1.4/Foundation/testsuite/src/MutexTest.h#1 $
+//
+// Definition of the MutexTest class.
+//
+// Copyright (c) 2007, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef MutexTest_INCLUDED
+#define MutexTest_INCLUDED
+
+
+#include "Poco/Foundation.h"
+#include "CppUnit/TestCase.h"
+
+
+class MutexTest: public CppUnit::TestCase
+{
+public:
+	MutexTest(const std::string& name);
+	~MutexTest();
+
+	void testFastMutexRecursion();
+
+	void setUp();
+	void tearDown();
+
+	static CppUnit::Test* suite();
+
+private:
+};
+
+
+#endif // MutexTest_INCLUDED

Foundation/testsuite/src/ThreadingTestSuite.cpp

@@ -12,6 +12,7 @@
 
 #include "ThreadingTestSuite.h"
 #include "ThreadTest.h"
+#include "MutexTest.h"
 #include "SemaphoreTest.h"
 #include "RWLockTest.h"
 #include "ThreadPoolTest.h"
@@ -28,6 +29,7 @@ CppUnit::Test* ThreadingTestSuite::suite()
 	CppUnit::TestSuite* pSuite = new CppUnit::TestSuite("ThreadingTestSuite");
 
 	pSuite->addTest(ThreadTest::suite());
+	pSuite->addTest(MutexTest::suite());
 	pSuite->addTest(SemaphoreTest::suite());
 	pSuite->addTest(RWLockTest::suite());
 	pSuite->addTest(ThreadPoolTest::suite());