global_quantum.cc revision 13516:315f10e2567b 
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#include <systemc>
21#include <tlm>
22
23namespace tlm
24{
25
26tlm_global_quantum::tlm_global_quantum() :
27    m_global_quantum(sc_core::SC_ZERO_TIME)
28{}
29
30tlm_global_quantum &
31tlm_global_quantum::instance()
32{
33    static tlm_global_quantum instance_;
34    return instance_;
35}
36
37sc_core::sc_time
38tlm_global_quantum::compute_local_quantum()
39{
40    if (m_global_quantum != sc_core::SC_ZERO_TIME) {
41        const sc_core::sc_time current = sc_core::sc_time_stamp();
42        const sc_core::sc_time g_quant = m_global_quantum;
43        return g_quant - (current % g_quant);
44    } else {
45        return sc_core::SC_ZERO_TIME;
46    }
47}
48
49} // namespace tlm
50