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diff --git a/sip/tqt/tqsemaphore.sip b/sip/tqt/tqsemaphore.sip
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+++ b/sip/tqt/tqsemaphore.sip
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+// This is the SIP interface definition for TQSemaphore.
+//
+// Copyright (c) 2007
+// 	Riverbank Computing Limited <info@riverbankcomputing.co.uk>
+// 
+// This file is part of PyTQt.
+// 
+// This copy of PyTQt 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 2, or (at your option) any later
+// version.
+// 
+// PyTQt is supplied 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
+// PyTQt; see the file LICENSE.  If not, write to the Free Software Foundation,
+// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+
+%ExportedDoc
+<Sect2><Title>TQSemaphore (TQt v2.2+)</Title>
+<Para>
+<Literal>TQSemaphore</Literal> is fully implemented.  The <Literal>+=</Literal>
+and <Literal>-=</Literal> operators have also been implemented, but require
+Python v2.0 or later.
+</Para>
+</Sect2>
+%End
+
+
+%If (TQt_THREAD_SUPPORT)
+
+class TQSemaphore
+{
+%TypeHeaderCode
+#include <tqsemaphore.h>
+%End
+
+public:
+	TQSemaphore(int);
+
+	int available() const;
+	int total() const;
+
+	TQSemaphore &operator+=(int);
+%MethodCode
+		// Some versions of TQt v3 under Windows have a bug where the +=
+		// operator doesn't work properly (but ++ does).  This way we
+		// make sure that the most common value of n (ie. 1) works
+		// properly with the buggy version.
+
+		Py_BEGIN_ALLOW_THREADS
+		if (a0 == 1)
+			(*sipCpp)++;
+		else
+			(*sipCpp) += a0;
+		Py_END_ALLOW_THREADS
+%End
+
+	TQSemaphore &operator-=(int);
+%MethodCode
+		// Some versions of TQt v3 under Windows have a bug where the -=
+		// operator doesn't work properly (but -- does).  This way we
+		// make sure that the most common value of n (ie. 1) works
+		// properly with the buggy version.
+
+		Py_BEGIN_ALLOW_THREADS
+		if (a0 == 1)
+			(*sipCpp)--;
+		else
+			(*sipCpp) -= a0;
+		Py_END_ALLOW_THREADS
+%End
+
+	bool tryAccess(int);
+
+private:
+	TQSemaphore(const TQSemaphore &);
+};
+
+%End