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101 lines
3.2 KiB
C++
101 lines
3.2 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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* Data structures used by the process scheduler
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*/
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#ifndef TINSEL_SCHED_H // prevent multiple includes
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#define TINSEL_SCHED_H
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#include "tinsel/dw.h" // new data types
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#include "tinsel/coroutine.h"
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namespace Tinsel {
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// the size of process specific info
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#define PARAM_SIZE 32
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// the maximum number of processes
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#define NUM_PROCESS 64
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typedef void (*CORO_ADDR)(CoroContext &);
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// process structure
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struct PROCESS {
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PROCESS *pNext; // pointer to next process in active or free list
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CoroContext state; // the state of the coroutine
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CORO_ADDR coroAddr; // the entry point of the coroutine
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int sleepTime; // number of scheduler cycles to sleep
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int pid; // process ID
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char param[PARAM_SIZE]; // process specific info
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};
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/*----------------------------------------------------------------------*\
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|* Scheduler Function Prototypes *|
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\*----------------------------------------------------------------------*/
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void InitScheduler(void); // called to init scheduler - kills all processes and places them on free list
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void FreeProcessList(void);
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#ifdef DEBUG
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void ProcessStats(void); // Shows the maximum number of process used at once
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#endif
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void Scheduler(void); // called to start process dispatching
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PROCESS *CoroutineInstall(int pid, CORO_ADDR coroAddr, const void *pParam, int sizeParam);
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void ProcessKill( // kill a process
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PROCESS *pKillProc); // which process to kill (must be different from current one)
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PROCESS *CurrentProcess(void); // Returns a pointer to the currently running process
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int ProcessGetPID( // Returns the process identifier of the specified process
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PROCESS *pProc); // which process
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char *ProcessGetParamsSelf();
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int KillMatchingProcess( // kill any process matching the pid parameters
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int pidKill, // process identifier of process to kill
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int pidMask); // mask to apply to process identifiers before comparison
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// Pointer to a function of the form "void function(PPROCESS)"
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typedef void (*VFPTRPP)(PROCESS *);
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void SetResourceCallback(VFPTRPP pFunc); // May be called by a resource allocator,
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// the function supplied is called by ProcessKill()
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// to allow the resource allocator to free resources
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// allocated to the dying process.
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} // end of namespace Tinsel
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#endif // TINSEL_SCHED_H
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