1/***************************************************************************** 2 3 Licensed to Accellera Systems Initiative Inc. (Accellera) under one or 4 more contributor license agreements. See the NOTICE file distributed 5 with this work for additional information regarding copyright ownership. 6 Accellera licenses this file to you under the Apache License, Version 2.0 7 (the "License"); you may not use this file except in compliance with the 8 License. You may obtain a copy of the License at 9 10 http://www.apache.org/licenses/LICENSE-2.0 11 12 Unless required by applicable law or agreed to in writing, software 13 distributed under the License is distributed on an "AS IS" BASIS, 14 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 15 implied. See the License for the specific language governing 16 permissions and limitations under the License. 17 18 *****************************************************************************/ 19 20#ifndef __TLM_FIFO_PEEK_H__ 21#define __TLM_FIFO_PEEK_H__ 22 23namespace tlm { 24 25template < typename T> 26inline 27T 28tlm_fifo<T>::peek( tlm_tag<T> * ) const { 29 30 while( is_empty() ) { 31 32 // call free-standing sc_core::wait(), 33 // since sc_prim_channel::wait(.) is not const 34 35 sc_core::wait( m_data_written_event ); 36 } 37 38 return buffer.read_data(); 39 40} 41 42template < typename T> 43inline 44bool 45tlm_fifo<T>::nb_peek( T &t ) const { 46 47 if( used() < 1 ) { 48 return false; 49 } 50 51 t = buffer.peek_data( 0 ); 52 return true; 53 54} 55 56template < typename T> 57inline 58bool 59tlm_fifo<T>::nb_peek( T &t , int n ) const { 60 61 if( n >= used() || n < -1 ) { 62 return false; 63 } 64 65 if( n == -1 ) { 66 n = used() - 1; 67 } 68 69 t = buffer.peek_data( n ); 70 return true; 71 72} 73 74template< typename T > 75inline 76bool 77tlm_fifo<T>::nb_can_peek( tlm_tag<T> * ) const 78{ 79 return !is_empty(); 80} 81 82template < typename T> 83inline 84bool 85tlm_fifo<T>::nb_poke( const T &t , int n ) { 86 87 if( n >= used() || n < 0 ) { 88 return false; 89 } 90 91 buffer.poke_data( n ) = t; 92 return true; 93 94} 95 96} // namespace tlm 97 98#endif 99