SystemC  Recoding Infrastructure for SystemC v0.6.3 derived from Accellera SystemC 2.3.1
Accellera SystemC proof-of-concept library
sc_writer_policy.h
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18 /*****************************************************************************
19 
20  sc_writer_policy.h -- The sc_signal<T> writer policy definition
21 
22  Original Author: Philipp A: Hartmann, OFFIS
23 
24  CHANGE LOG IS AT THE END OF THE FILE
25  *****************************************************************************/
26 
27 
28 #ifndef SC_WRITER_POLICY_H_INCLUDED_
29 #define SC_WRITER_POLICY_H_INCLUDED_
30 
31 #if !defined(SC_DEFAULT_WRITER_POLICY)
32 # if defined(SC_NO_WRITE_CHECK)
33 # define SC_DEFAULT_WRITER_POLICY SC_UNCHECKED_WRITERS
34 # else
35 # define SC_DEFAULT_WRITER_POLICY SC_ONE_WRITER
36 # endif
37 #endif
38 
39 namespace sc_core {
40 
41 class sc_object;
42 class sc_port_base;
43 extern
44 void
45 sc_signal_invalid_writer( sc_object* target, sc_object* first_writer,
46  sc_object* second_writer, bool check_delta );
47 
48 // SIGNAL WRITING POLICIES
49 //
50 // Note: if you add a new policy to the enum below you will need to add
51 // an additional overload of sc_reset::reset_signal_is() for the sc_signal<bool>
52 // instance. That will require changes to sysc/kernel/sc_reset.cpp and
53 // sysc/kernel/sc_reset.h
54 
56 {
60 };
61 
62 // signal forward declaration
63 template< typename T, sc_writer_policy POL = SC_DEFAULT_WRITER_POLICY >
64 class sc_signal;
65 
66 template< sc_writer_policy >
68 
70 {
71  bool check_write( sc_object* /* target */, bool /* value_changed */ )
72  { return true; }
73  void update(){}
74 };
75 
77 {
78  bool check_write( sc_object* target, bool value_changed );
79  void update(){}
80 protected:
81  sc_writer_policy_check_write( bool check_delta = false )
82  : m_check_delta( check_delta ), m_writer_p(NULL) {}
83  const bool m_check_delta;
85 };
86 
89 {
90 
93 
94  bool check_write( sc_object* target, bool value_changed )
95  {
96  if( value_changed )
97  return sc_writer_policy_check_write::check_write( target, true );
98  return true;
99  }
100 
101  void update(){ m_writer_p = NULL; }
102 };
103 
105 {
107  { return true; }
108 };
109 
111 {
112  bool check_port( sc_object* target, sc_port_base* port, bool is_output );
113 
114 protected:
117 };
118 
119 template<>
123 {};
124 
125 template<>
129 {};
130 
131 template<>
135 {};
136 
137 } // namespace sc_core
138 
139 #endif
140 
141 // Taf!
bool check_port(sc_object *target, sc_port_base *port, bool is_output)
allow multiple writers (with different ports)
sc_writer_policy_check_write(bool check_delta=false)
unique writer (from a unique port)
even allow delta cycle conflicts (non-standard)
bool check_port(sc_object *, sc_port_base *, bool)
Abstract base class for class sc_port_b.
Definition: sc_port.h:69
bool check_write(sc_object *target, bool value_changed)
Definition: sc_signal.h:52
bool check_write(sc_object *target, bool value_changed)
void sc_signal_invalid_writer(sc_object *target, sc_object *first_writer, sc_object *second_writer, bool check_delta)
Abstract base class of all SystemC `simulation&#39; objects.
Definition: sc_object.h:51