Process.h

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/*
Copyright (C) 2002-2005 The Pentagram team

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

#ifndef PROCESS_H
#define PROCESS_H

#include <vector>
class IDataSource;
class ODataSource;

class Process {
public:

        friend class Kernel;

        // returns true if screen needs to be repainted
        virtual bool run(const uint32 framenum) = 0;

        Process(ObjId item_num=0, uint16 type=0);
        virtual ~Process() { }

        // p_dynamic_cast stuff
        ENABLE_RUNTIME_CLASSTYPE();

        // memory pooling stuff
        ENABLE_CUSTOM_MEMORY_ALLOCATION();

        uint32 getProcessFlags() const { return flags; }
        bool is_active() const { return (flags & PROC_ACTIVE); }
        bool is_terminated() const { return (flags & (PROC_TERMINATED |
                                                                                                  PROC_TERM_DEFERRED))!=0; }
        bool is_suspended() const { return (flags & PROC_SUSPENDED)!=0; }

        void fail();

        virtual void terminate();

        void terminateDeferred() { flags |= PROC_TERM_DEFERRED; }

        void waitFor(ProcId pid);

        void waitFor(Process* proc);

        void suspend();

        void wakeUp(uint32 result);

        void setItemNum(ObjId it) { item_num = it; }
        void setType(uint16 ty) { type = ty; }

        ProcId getPid() const { return pid; }
        ObjId getItemNum() const { return item_num; }
        uint16 getType() const { return type; }

        virtual void dumpInfo();

        void save(ODataSource* ods);

        bool loadData(IDataSource* ids, uint32 version);

protected:
        virtual void saveData(ODataSource* ods);

        void writeProcessHeader(ODataSource* ods);

        ProcId pid;

        uint32 flags;

        ObjId item_num;
        uint16 type;

        uint32 result;

        std::vector<ProcId> waiting;

public:

        enum processflags {
                PROC_ACTIVE      = 0x0001, 
                PROC_SUSPENDED   = 0x0002, 
                PROC_TERMINATED  = 0x0004,
                PROC_TERM_DEFERRED=0x0008, 
                PROC_FAILED      = 0x0010,
                PROC_RUNPAUSED   = 0x0020, 
        };

};


#endif

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