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diff --git a/ext/systemc/src/sysc/qt/stp.h b/ext/systemc/src/sysc/qt/stp.h
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+#ifndef STP_H
+#define STP_H
+
+/*
+ * QuickThreads -- Threads-building toolkit.
+ * Copyright (c) 1993 by David Keppel
+ *
+ * Permission to use, copy, modify and distribute this software and
+ * its documentation for any purpose and without fee is hereby
+ * granted, provided that the above copyright notice and this notice
+ * appear in all copies. This software is provided as a
+ * proof-of-concept and for demonstration purposes; there is no
+ * representation about the suitability of this software for any
+ * purpose.
+ */
+
+typedef struct stp_t stp_t;
+
+/* Each thread starts by calling a user-supplied function of this
+ type. */
+
+typedef void (stp_userf_t)(void *p0);
+
+/* Call this before any other primitives. */
+extern void stp_init();
+
+/* When one or more threads are created by the main thread,
+ the system goes multithread when this is called. It is done
+ (no more runable threads) when this returns. */
+
+extern void stp_start (void);
+
+/* Create a thread and make it runable. When the thread starts
+ running it will call `f' with arguments `p0' and `p1'. */
+
+extern void stp_create (stp_userf_t *f, void *p0);
+
+/* The current thread stops running but stays runable.
+ It is an error to call `stp_yield' before `stp_start'
+ is called or after `stp_start' returns. */
+
+extern void stp_yield (void);
+
+/* Like `stp_yield' but the thread is discarded. Any intermediate
+ state is lost. The thread can also terminate by simply
+ returning. */
+
+extern void stp_abort (void);
+
+
+#endif /* ndef STP_H */