diff --git a/Magick++/lib/Thread.cpp b/Magick++/lib/Thread.cpp
new file mode 100644
index 0000000..55a4d8f
--- /dev/null
+++ b/Magick++/lib/Thread.cpp
@@ -0,0 +1,107 @@
+// This may look like C code, but it is really -*- C++ -*-
+//
+// Copyright Bob Friesenhahn, 1999, 2000, 2001, 2002
+//
+// Implementation of thread support
+//
+
+#define MAGICKCORE_IMPLEMENTATION 1
+#define MAGICK_PLUSPLUS_IMPLEMENTATION 1
+
+#include "Magick++/Thread.h"
+#include "Magick++/Exception.h"
+
+#include <string.h>
+
+// Default constructor
+Magick::MutexLock::MutexLock(void)
+#if defined(MAGICKCORE_HAVE_PTHREAD)
+ // POSIX threads
+ : _mutex()
+{
+ ::pthread_mutexattr_t attr;
+ int sysError;
+ if ( (sysError = ::pthread_mutexattr_init( &attr )) == 0 )
+ if ( (sysError = ::pthread_mutex_init( &_mutex, &attr )) == 0 )
+ {
+ ::pthread_mutexattr_destroy( &attr );
+ return;
+ }
+ throwExceptionExplicit( OptionError, "mutex initialization failed",
+ strerror(sysError) );
+}
+#else
+#if defined(_VISUALC_) && defined(_MT)
+// Win32 threads
+ : _mutex()
+{
+ SECURITY_ATTRIBUTES security;
+
+ /* Allow the semaphore to be inherited */
+ security.nLength = sizeof(security);
+ security.lpSecurityDescriptor = NULL;
+ security.bInheritHandle = TRUE;
+
+ /* Create the semaphore, with initial value signaled */
+ _mutex.id = ::CreateSemaphore(&security, 1, MAXSEMLEN, NULL);
+ if ( _mutex.id != NULL )
+ return;
+ throwExceptionExplicit( OptionError, "mutex initialization failed" );
+}
+#else
+// Threads not supported
+{
+}
+#endif
+#endif
+
+// Destructor
+Magick::MutexLock::~MutexLock(void)
+{
+#if defined(MAGICKCORE_HAVE_PTHREAD)
+ int sysError;
+ if ( (sysError = ::pthread_mutex_destroy( &_mutex )) == 0 )
+ return;
+ throwExceptionExplicit( OptionError, "mutex destruction failed",
+ strerror(sysError) );
+#endif
+#if defined(_MT) && defined(_VISUALC_)
+ if ( ::CloseHandle(_mutex.id) != 0 )
+ return;
+ throwExceptionExplicit( OptionError, "mutex destruction failed" );
+#endif
+}
+
+// Lock mutex
+void Magick::MutexLock::lock(void)
+{
+#if defined(MAGICKCORE_HAVE_PTHREAD)
+ int sysError;
+ if ( (sysError = ::pthread_mutex_lock( &_mutex )) == 0)
+ return;
+ throwExceptionExplicit( OptionError, "mutex lock failed",
+ strerror(sysError));
+#endif
+#if defined(_MT) && defined(_VISUALC_)
+ if (WaitForSingleObject(_mutex.id,INFINITE) != WAIT_FAILED)
+ return;
+ throwExceptionExplicit( OptionError, "mutex lock failed" );
+#endif
+}
+
+// Unlock mutex
+void Magick::MutexLock::unlock(void)
+{
+#if defined(MAGICKCORE_HAVE_PTHREAD)
+ int sysError;
+ if ( (sysError = ::pthread_mutex_unlock( &_mutex )) == 0)
+ return;
+ throwExceptionExplicit( OptionError, "mutex unlock failed",
+ strerror(sysError) );
+#endif
+#if defined(_MT) && defined(_VISUALC_)
+ if ( ReleaseSemaphore(_mutex.id, 1, NULL) == TRUE )
+ return;
+ throwExceptionExplicit( OptionError, "mutex unlock failed" );
+#endif
+}