process.hh

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#ifndef __SYSTEMC_CORE_PROCESS_HH__
#define __SYSTEMC_CORE_PROCESS_HH__
 
#include <functional>
#include <memory>
#include <vector>
 
#include "base/fiber.hh"
#include "systemc/core/list.hh"
#include "systemc/core/module.hh"
#include "systemc/core/object.hh"
#include "systemc/core/sched_event.hh"
#include "systemc/core/sensitivity.hh"
#include "systemc/ext/channel/sc_signal_in_if.hh"
#include "systemc/ext/core/sc_event.hh"
#include "systemc/ext/core/sc_module.hh"
#include "systemc/ext/core/sc_process_handle.hh"
 
namespace sc_core
{
 
class sc_join;
 
} // namespace sc_core
 
namespace sc_gem5
{
 
class ScHalt
{};
 
class Process;
class Reset;
 
class Process : public ::sc_core::sc_process_b, public ListNode
{
  public:
    virtual ::sc_core::sc_curr_proc_kind procKind() const = 0;
    bool needsStart() const { return _needsStart; }
    void needsStart(bool ns) { _needsStart = ns; }
    bool dynamic() const { return _dynamic; }
    bool isUnwinding() const { return _isUnwinding; }
    void isUnwinding(bool v) { _isUnwinding = v; }
    bool terminated() const { return _terminated; }
 
    bool scheduled() const { return _scheduled; }
    void scheduled(bool new_val) { _scheduled = new_val; }
 
    void forEachKid(const std::function<void(Process *)> &work);
 
    bool suspended() const { return _suspended; }
    bool disabled() const { return _disabled; }
 
    void suspend(bool inc_kids);
    void resume(bool inc_kids);
    void disable(bool inc_kids);
    void enable(bool inc_kids);
 
    void kill(bool inc_kids);
    void reset(bool inc_kids);
    void throw_it(ExceptionWrapperBase &exc, bool inc_kids);
 
    void injectException(ExceptionWrapperBase &exc);
    ExceptionWrapperBase *excWrapper;
 
    void syncResetOn(bool inc_kids);
    void syncResetOff(bool inc_kids);
 
    void signalReset(bool set, bool sync);
 
    void incref() { refCount++; }
    void decref() { refCount--; }
 
    ::sc_core::sc_event &resetEvent() { return _resetEvent; }
    ::sc_core::sc_event &terminatedEvent() { return _terminatedEvent; }
 
    void setStackSize(size_t size) { stackSize = size; }
 
    void run();
 
    void addStatic(StaticSensitivity *);
    void setDynamic(DynamicSensitivity *);
    void clearDynamic() { setDynamic(nullptr); }
    void addReset(Reset *);
 
    ScEvent timeoutEvent;
    void setTimeout(::sc_core::sc_time t);
    void cancelTimeout();
 
    void satisfySensitivity(Sensitivity *);
 
    void ready();
 
    virtual gem5::Fiber *fiber() { return gem5::Fiber::primaryFiber(); }
 
    static Process *newest() { return _newest; }
 
    void lastReport(::sc_core::sc_report *report);
    ::sc_core::sc_report *lastReport() const;
 
    bool hasStaticSensitivities() { return !staticSensitivities.empty(); }
    bool internal() { return _internal; }
    bool timedOut() { return _timedOut; }
    bool inReset() { return _syncReset || syncResetCount || asyncResetCount; }
 
    bool dontInitialize() { return _dontInitialize; }
    void dontInitialize(bool di) { _dontInitialize = di; }
 
    void joinWait(::sc_core::sc_join *join) { joinWaiters.push_back(join); }
 
    void waitCount(int count) { _waitCount = count; }
 
    const char *uniqueName(const char *seed) { return nameGen.gen(seed); }
 
  protected:
    void timeout();
 
    Process(const char *name, ProcessFuncWrapper *func, bool internal=false);
 
    static Process *_newest;
 
    virtual ~Process()
    {
        popListNode();
        delete func;
        for (auto s: staticSensitivities) {
            s->clear();
            delete s;
        }
        clearDynamic();
    }
 
    InternalScEvent _resetEvent;
    InternalScEvent _terminatedEvent;
 
    ProcessFuncWrapper *func;
 
    bool _internal;
 
    // Needed to support the deprecated "timed_out" function.
    bool _timedOut;
 
    bool _dontInitialize;
 
    bool _needsStart;
    bool _dynamic;
    bool _isUnwinding;
    bool _terminated;
    bool _scheduled;
 
    void terminate();
 
    bool _suspended;
    bool _suspendedReady;
    bool _disabled;
 
    bool _syncReset;
 
    int syncResetCount;
    int asyncResetCount;
 
    int _waitCount;
 
    int refCount;
 
    size_t stackSize;
 
    StaticSensitivities staticSensitivities;
    DynamicSensitivity *dynamicSensitivity;
    std::vector<Reset *> resets;
 
    std::unique_ptr<::sc_core::sc_report> _lastReport;
 
    std::vector<::sc_core::sc_join *> joinWaiters;
 
    UniqueNameGen nameGen;
};
 
class Reset
{
  public:
    Reset(Process *p, bool s, bool v) :
        _process(p), _signal(nullptr), _sync(s), _value(v)
    {}
 
    bool
    install(const sc_core::sc_signal_in_if<bool> *s)
    {
        _signal = s;
 
        if (_signal->_addReset(this)) {
            _process->addReset(this);
            if (_signal->read() == _value)
                update();
            return true;
        }
        return false;
    }
    void update() { _process->signalReset(_signal->read() == _value, _sync); }
 
    Process *process() { return _process; }
    const sc_core::sc_signal_in_if<bool> *signal() { return _signal; }
    bool sync() { return _sync; }
    bool value() { return _value; }
 
  private:
    Process *_process;
    const sc_core::sc_signal_in_if<bool> *_signal;
    bool _sync;
    bool _value;
};
 
void newReset(const sc_core::sc_port_base *pb, Process *p, bool s, bool v);
void newReset(const sc_core::sc_signal_in_if<bool> *sig, Process *p,
        bool s, bool v);
 
} // namespace sc_gem5
 
#endif  //__SYSTEMC_CORE_PROCESS_HH__