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diff --git a/lib/cpluff/libcpluff/thread.h b/lib/cpluff/libcpluff/thread.h
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+/*-------------------------------------------------------------------------
+ * C-Pluff, a plug-in framework for C
+ * Copyright 2007 Johannes Lehtinen
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *-----------------------------------------------------------------------*/
+
+/** @file
+ * Declarations for generic mutex functions and types
+ */ 
+
+#ifndef THREAD_H_
+#define THREAD_H_
+#ifdef CP_THREADS
+
+#include "defines.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif //__cplusplus
+
+
+/* ------------------------------------------------------------------------
+ * Data types
+ * ----------------------------------------------------------------------*/
+
+// A generic mutex implementation 
+typedef struct cpi_mutex_t cpi_mutex_t;
+
+
+/* ------------------------------------------------------------------------
+ * Function declarations
+ * ----------------------------------------------------------------------*/
+
+// Mutex functions 
+
+/**
+ * Creates a mutex. The mutex is initially available.
+ * 
+ * @return the created mutex or NULL if no resources available
+ */
+CP_HIDDEN cpi_mutex_t * cpi_create_mutex(void);
+
+/**
+ * Destroys the specified mutex.
+ * 
+ * @param mutex the mutex
+ */
+CP_HIDDEN void cpi_destroy_mutex(cpi_mutex_t *mutex);
+
+/**
+ * Waits for the specified mutex to become available and locks it.
+ * If the calling thread has already locked the mutex then the
+ * lock count of the mutex is increased.
+ * 
+ * @param mutex the mutex
+ */
+CP_HIDDEN void cpi_lock_mutex(cpi_mutex_t *mutex);
+
+/**
+ * Unlocks the specified mutex which must have been previously locked
+ * by this thread. If there has been several calls to cpi_lock_mutex
+ * by the same thread then the mutex is unlocked only after corresponding
+ * number of unlock requests.
+ * 
+ * @param mutex the mutex
+ */
+CP_HIDDEN void cpi_unlock_mutex(cpi_mutex_t *mutex);
+
+/**
+ * Waits on the specified mutex until it is signaled. The calling thread
+ * must hold the mutex. The mutex is released on call to this function and
+ * it is reacquired before the function returns.
+ * 
+ * @param mutex the mutex to wait on
+ */
+CP_HIDDEN void cpi_wait_mutex(cpi_mutex_t *mutex);
+
+/**
+ * Signals the specified mutex waking all the threads currently waiting on
+ * the mutex. The calling thread must hold the mutex. The mutex is not
+ * released.
+ * 
+ * @param mutex the mutex to be signaled
+ */
+CP_HIDDEN void cpi_signal_mutex(cpi_mutex_t *mutex);
+
+#if !defined(NDEBUG)
+
+/**
+ * Returns whether the mutex is currently locked. This function
+ * is only intended to be used for assertions. The returned state
+ * reflects the state of the mutex only at the time of inspection.
+ */
+CP_HIDDEN int cpi_is_mutex_locked(cpi_mutex_t *mutex);
+
+#endif
+
+#ifdef __cplusplus
+}
+#endif //__cplusplus 
+
+#endif //CP_THREADS
+#endif //THREAD_H_