mirror of
https://github.com/libretro/scummvm.git
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149 lines
4.0 KiB
C++
149 lines
4.0 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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#include "tinsel/events.h"
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#include "tinsel/tinsel.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 (TinselV2 ? 70 : 64)
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#define MAX_PROCESSES 70
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typedef void (*CORO_ADDR)(CoroContext &, const void *);
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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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PROCESS *pPrevious; //!< pointer to previous 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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typedef PROCESS *PPROCESS;
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struct INT_CONTEXT;
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/**
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* Create and manage "processes" (really coroutines).
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*/
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class Scheduler {
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public:
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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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private:
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/** list of all processes */
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PROCESS *processList;
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/** active process list - also saves scheduler state */
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PROCESS *active;
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/** pointer to free process list */
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PROCESS *pFreeProcesses;
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/** the currently active process */
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PROCESS *pCurrent;
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#ifdef DEBUG
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// diagnostic process counters
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int numProcs;
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int maxProcs;
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void CheckStack();
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#endif
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/**
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* Called from killProcess() to enable other resources
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* a process may be allocated to be released.
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*/
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VFPTRPP pRCfunction;
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public:
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Scheduler();
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~Scheduler();
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void reset();
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#ifdef DEBUG
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void printStats();
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#endif
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void schedule();
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void rescheduleAll();
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void reschedule(PPROCESS pReSchedProc = NULL);
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void giveWay(PPROCESS pReSchedProc = NULL);
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PROCESS *createProcess(int pid, CORO_ADDR coroAddr, const void *pParam, int sizeParam);
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void killProcess(PROCESS *pKillProc);
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PROCESS *getCurrentProcess();
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int getCurrentPID() const;
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int killMatchingProcess(int pidKill, int pidMask = -1);
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void setResourceCallback(VFPTRPP pFunc);
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};
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extern Scheduler *g_scheduler; // FIXME: Temporary global var, to be used until everything has been OOifyied
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//----------------- FUNCTION PROTOTYPES --------------------
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void SceneProcesses(uint32 numProcess, SCNHANDLE hProcess);
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void CallSceneProcess(uint32 procID);
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void KillSceneProcess(uint32 procID);
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void SceneProcessEvent(CORO_PARAM, uint32 procID, TINSEL_EVENT event, bool bWait,
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int myEscape, bool *result = NULL);
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void RestoreSceneProcess(INT_CONTEXT *pic);
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void GlobalProcesses(uint32 numProcess, byte *pProcess);
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void xCallGlobalProcess(uint32 procID);
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void xKillGlobalProcess(uint32 procID);
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bool GlobalProcessEvent(CORO_PARAM, uint32 procID, TINSEL_EVENT event, bool bWait, int myEscape);
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void RestoreGlobalProcess(INT_CONTEXT *pic);
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void KillGlobalProcesses(void);
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void FreeGlobalProcesses();
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} // end of namespace Tinsel
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#endif // TINSEL_SCHED_H
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