process_types.hh revision 13131:bf07048d69e4 
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) : Process(name, func) {}
43
44    const char *kind() const override { return "sc_method_process"; }
45
46    sc_core::sc_curr_proc_kind
47    procKind() const override
48    {
49        return sc_core::SC_METHOD_PROC_;
50    }
51};
52
53class Thread : public Process
54{
55  public:
56    Thread(const char *name, ProcessFuncWrapper *func) :
57        Process(name, func), ctx(nullptr)
58    {}
59
60    ~Thread() { delete ctx; }
61
62    const char *kind() const override { return "sc_thread_process"; }
63
64    void throw_it(ExceptionWrapperBase &exc, bool inc_kids) override;
65
66    sc_core::sc_curr_proc_kind
67    procKind() const override
68    {
69        return sc_core::SC_THREAD_PROC_;
70    }
71
72    Fiber *
73    fiber() override
74    {
75        if (!ctx)
76            ctx = new Context(this, stackSize);
77        return ctx;
78    }
79
80  private:
81    class Context : public Fiber
82    {
83      public:
84        Context(Thread *thread, size_t size) : Fiber(size), thread(thread) {}
85
86      private:
87        Thread *thread;
88
89        void
90        main() override
91        {
92            thread->_needsStart = false;
93            thread->run();
94            thread->terminate();
95            scheduler.yield();
96        }
97    };
98    friend class Context;
99
100    Context *ctx;
101};
102
103class CThread : public Thread
104{
105  public:
106    CThread(const char *name, ProcessFuncWrapper *func) : Thread(name, func)
107    {
108        // We'll be in the initialization list now, but we shouldn't be.
109        popListNode();
110    }
111
112    const char *kind() const override { return "sc_cthread_process"; }
113
114    sc_core::sc_curr_proc_kind
115    procKind() const override
116    {
117        return sc_core::SC_CTHREAD_PROC_;
118    }
119};
120
121} // namespace sc_gem5
122
123#endif  //__SYSTEMC_CORE_PROCESS_TYPES_HH__
124