text: /*
   * Copyright 2018 Google, Inc.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are
   * met: redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer;
   * redistributions in binary form must reproduce the above copyright
   * notice, this list of conditions and the following disclaimer in the
   * documentation and/or other materials provided with the distribution;
   * neither the name of the copyright holders nor the names of its
   * contributors may be used to endorse or promote products derived from
   * this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   * Authors: Gabe Black
   */
  
  #ifndef __SYSTEMC_CORE_PROCESS_TYPES_HH__
  #define __SYSTEMC_CORE_PROCESS_TYPES_HH__
  
  #include "systemc/core/process.hh"
  #include "systemc/core/scheduler.hh"
  
  namespace sc_gem5
  {
  
  class Method : public Process
  {
    public:
      Method(const char *name, ProcessFuncWrapper *func, bool _dynamic=false) :
          Process(name, func, _dynamic)
      {}
  
      const char *kind() const override { return "sc_method_process"; }
  
      sc_core::sc_curr_proc_kind
      procKind() const override
      {
          return sc_core::SC_METHOD_PROC_;
      }
  };
  
  class Thread : public Process
  {
    public:
      Thread(const char *name, ProcessFuncWrapper *func, bool _dynamic=false) :
          Process(name, func, _dynamic), ctx(nullptr)
      {}
  
      ~Thread() { delete ctx; }
  
      const char *kind() const override { return "sc_thread_process"; }
  
      void throw_it(ExceptionWrapperBase &exc, bool inc_kids) override;
  
      sc_core::sc_curr_proc_kind
      procKind() const override
      {
          return sc_core::SC_THREAD_PROC_;
      }
  
      Fiber *
      fiber() override
      {
          if (!ctx)
              ctx = new Context(this, stackSize);
          return ctx;
      }
  
    private:
      class Context : public Fiber
      {
        public:
          Context(Thread *thread, size_t size) : Fiber(size), thread(thread) {}
  
        private:
          Thread *thread;
  
          void
          main() override
          {
              thread->_needsStart = false;
              thread->run();
              thread->terminate();
              scheduler.yield();
          }
      };
      friend class Context;
  
      Context *ctx;
  };
  
  class CThread : public Thread
  {
    public:
      CThread(const char *name, ProcessFuncWrapper *func, bool _dynamic=false) :
          Thread(name, func, _dynamic)
      {
          // We'll be in the initialization list now, but we shouldn't be.
          popListNode();
      }
  
      const char *kind() const override { return "sc_cthread_process"; }
  
      sc_core::sc_curr_proc_kind
      procKind() const override
      {
          return sc_core::SC_CTHREAD_PROC_;
      }
  };
  
  } // namespace sc_gem5
  
  #endif  //__SYSTEMC_CORE_PROCESS_TYPES_HH__
  