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diff --git a/src/systemc/ext/tlm_core/tlm_1/tlm_req_rsp/tlm_1_interfaces/tlm_fifo_ifs.h b/src/systemc/ext/tlm_core/tlm_1/tlm_req_rsp/tlm_1_interfaces/tlm_fifo_ifs.h
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+/*****************************************************************************
+
+ Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
+ more contributor license agreements. See the NOTICE file distributed
+ with this work for additional information regarding copyright ownership.
+ Accellera licenses this file to you under the Apache License, Version 2.0
+ (the "License"); you may not use this file except in compliance with the
+ License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ implied. See the License for the specific language governing
+ permissions and limitations under the License.
+
+ *****************************************************************************/
+
+//
+// Note to the LRM writer : These interfaces are channel specific interfaces
+// useful in the context of tlm_fifo.
+//
+
+#ifndef __TLM_FIFO_IFS_H__
+#define __TLM_FIFO_IFS_H__
+
+#include "tlm_core/tlm_1/tlm_req_rsp/tlm_1_interfaces/tlm_core_ifs.h"
+
+namespace tlm {
+
+//
+// Fifo specific interfaces
+//
+
+// Fifo Debug Interface
+
+template< typename T >
+class tlm_fifo_debug_if : public virtual sc_core::sc_interface
+{
+public:
+ virtual int used() const = 0;
+ virtual int size() const = 0;
+ virtual void debug() const = 0;
+
+ //
+ // non blocking peek and poke - no notification
+ //
+ // n is index of data :
+ // 0 <= n < size(), where 0 is most recently written, and size() - 1
+ // is oldest ie the one about to be read.
+ //
+
+ virtual bool nb_peek( T & , int n ) const = 0;
+ virtual bool nb_poke( const T & , int n = 0 ) = 0;
+
+};
+
+// fifo interfaces = extended + debug
+
+template < typename T >
+class tlm_fifo_put_if :
+ public virtual tlm_put_if<T> ,
+ public virtual tlm_fifo_debug_if<T> {};
+
+template < typename T >
+class tlm_fifo_get_if :
+ public virtual tlm_get_peek_if<T> ,
+ public virtual tlm_fifo_debug_if<T> {};
+
+class tlm_fifo_config_size_if : public virtual sc_core::sc_interface
+{
+public:
+ virtual void nb_expand( unsigned int n = 1 ) = 0;
+ virtual void nb_unbound( unsigned int n = 16 ) = 0;
+
+ virtual bool nb_reduce( unsigned int n = 1 ) = 0;
+ virtual bool nb_bound( unsigned int n ) = 0;
+
+};
+
+} // namespace tlm
+
+#endif
+