process_types.hh revision 13092:a4995c783157 
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_CORE_PROCESS_TYPES_HH__
31#define __SYSTEMC_CORE_PROCESS_TYPES_HH__
32
33#include "systemc/core/process.hh"
34#include "systemc/core/scheduler.hh"
35
36namespace sc_gem5
37{
38
39class Method : public Process
40{
41  public:
42    Method(const char *name, ProcessFuncWrapper *func, bool _dynamic=false) :
43        Process(name, func, _dynamic)
44    {}
45
46    const char *kind() const override { return "sc_method_process"; }
47
48    sc_core::sc_curr_proc_kind
49    procKind() const override
50    {
51        return sc_core::SC_METHOD_PROC_;
52    }
53};
54
55class Thread : public Process
56{
57  public:
58    Thread(const char *name, ProcessFuncWrapper *func, bool _dynamic=false) :
59        Process(name, func, _dynamic), ctx(nullptr)
60    {}
61
62    ~Thread() { delete ctx; }
63
64    const char *kind() const override { return "sc_thread_process"; }
65
66    void throw_it(ExceptionWrapperBase &exc, bool inc_kids) override;
67
68    sc_core::sc_curr_proc_kind
69    procKind() const override
70    {
71        return sc_core::SC_THREAD_PROC_;
72    }
73
74    Fiber *
75    fiber() override
76    {
77        if (!ctx)
78            ctx = new Context(this, stackSize);
79        return ctx;
80    }
81
82  private:
83    class Context : public Fiber
84    {
85      public:
86        Context(Thread *thread, size_t size) : Fiber(size), thread(thread) {}
87
88      private:
89        Thread *thread;
90
91        void
92        main() override
93        {
94            thread->_needsStart = false;
95            thread->run();
96            thread->terminate();
97            scheduler.yield();
98        }
99    };
100    friend class Context;
101
102    Context *ctx;
103};
104
105class CThread : public Thread
106{
107  public:
108    CThread(const char *name, ProcessFuncWrapper *func, bool _dynamic=false) :
109        Thread(name, func, _dynamic)
110    {
111        // We'll be in the initialization list now, but we shouldn't be.
112        popListNode();
113    }
114
115    const char *kind() const override { return "sc_cthread_process"; }
116
117    sc_core::sc_curr_proc_kind
118    procKind() const override
119    {
120        return sc_core::SC_CTHREAD_PROC_;
121    }
122};
123
124} // namespace sc_gem5
125
126#endif  //__SYSTEMC_CORE_PROCESS_TYPES_HH__
127