1/*
2 * Copyright 2018 Google, Inc.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met: redistributions of source code must retain the above copyright
7 * notice, this list of conditions and the following disclaimer;
8 * redistributions in binary form must reproduce the above copyright
9 * notice, this list of conditions and the following disclaimer in the
10 * documentation and/or other materials provided with the distribution;
11 * neither the name of the copyright holders nor the names of its
12 * contributors may be used to endorse or promote products derived from
13 * this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 * Authors: Gabe Black
28 */
29
30#ifndef __SYSTEMC_EXT_CHANNEL_SC_SIGNAL_INOUT_IF_HH__
31#define __SYSTEMC_EXT_CHANNEL_SC_SIGNAL_INOUT_IF_HH__
32
33#include "../core/sc_interface.hh"
34#include "sc_signal_in_if.hh"
35
36namespace sc_core
37{
38
39enum sc_writer_policy
40{
41    SC_ONE_WRITER,
42    SC_MANY_WRITERS
43};
44
45template <class T>
46class sc_signal_write_if : virtual public sc_interface
47{
48  public:
49    virtual sc_writer_policy
50    get_writer_policy() const
51    {
52        return SC_ONE_WRITER;
53    }
54    virtual void write(const T &) = 0;
55
56  protected:
57    sc_signal_write_if() : sc_interface() {}
58
59  private:
60    // Disabled
61    sc_signal_write_if(const sc_signal_write_if<T> &) : sc_interface() {}
62    sc_signal_write_if<T> &
63    operator = (const sc_signal_write_if<T> &)
64    {
65        return *this;
66    }
67};
68
69template <class T>
70class sc_signal_inout_if : public sc_signal_in_if<T>,
71                           public sc_signal_write_if<T>
72{
73  protected:
74    sc_signal_inout_if() : sc_signal_in_if<T>(), sc_signal_write_if<T>() {}
75
76  private:
77    // Disabled
78    sc_signal_inout_if(const sc_signal_inout_if<T> &) :
79        sc_signal_in_if<T>(), sc_signal_write_if<T>()
80    {}
81    sc_signal_inout_if<T> &
82    operator = (const sc_signal_inout_if<T> &)
83    {
84        return *this;
85    }
86};
87
88// Deprecated.
89template <class T>
90using sc_signal_out_if = sc_signal_inout_if<T>;
91
92} // namespace sc_core
93
94#endif  //__SYSTEMC_EXT_CHANNEL_SC_SIGNAL_INOUT_IF_HH__
95