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Diffstat (limited to 'engines/tinsel/sched.h')
| -rw-r--r-- | engines/tinsel/sched.h | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/engines/tinsel/sched.h b/engines/tinsel/sched.h new file mode 100644 index 0000000000..0d90b3bb9f --- /dev/null +++ b/engines/tinsel/sched.h @@ -0,0 +1,110 @@ +/* ScummVM - Graphic Adventure Engine + * + * ScummVM is the legal property of its developers, whose names + * are too numerous to list here. Please refer to the COPYRIGHT + * file distributed with this source distribution. + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * $URL$ + * $Id$ + * + * Data structures used by the process scheduler + */ + +#ifndef TINSEL_SCHED_H // prevent multiple includes +#define TINSEL_SCHED_H + +#include "tinsel/dw.h" // new data types +#include "tinsel/coroutine.h" + +namespace Tinsel { + +// the size of process specific info +#define PARAM_SIZE 32 + +// the maximum number of processes +#define NUM_PROCESS 64 + +typedef void (*CORO_ADDR)(CoroContext &, const void *); + + +struct PROCESS; + +/** + * Create and manage "processes" (really coroutines). + */ +class Scheduler { +public: + /** Pointer to a function of the form "void function(PPROCESS)" */ + typedef void (*VFPTRPP)(PROCESS *); + +private: + + /** list of all processes */ + PROCESS *processList; + + /** active process list - also saves scheduler state */ + PROCESS *active; + + /** pointer to free process list */ + PROCESS *pFreeProcesses; + + /** the currently active process */ + PROCESS *pCurrent; + +#ifdef DEBUG + // diagnostic process counters + int numProcs; + int maxProcs; +#endif + + /** + * Called from killProcess() to enable other resources + * a process may be allocated to be released. + */ + VFPTRPP pRCfunction; + + +public: + + Scheduler(); + ~Scheduler(); + + void reset(); + + #ifdef DEBUG + void printStats(); + #endif + + void schedule(); + + PROCESS *createProcess(int pid, CORO_ADDR coroAddr, const void *pParam, int sizeParam); + void killProcess(PROCESS *pKillProc); + + PROCESS *getCurrentProcess(); + int getCurrentPID() const; + int killMatchingProcess(int pidKill, int pidMask); + + + void setResourceCallback(VFPTRPP pFunc); + +}; + +extern Scheduler *g_scheduler; // FIXME: Temporary global var, to be used until everything has been OOifyied + +} // end of namespace Tinsel + +#endif // TINSEL_SCHED_H |
