aboutsummaryrefslogtreecommitdiff
path: root/engines/tinsel/sched.h
diff options
context:
space:
mode:
Diffstat (limited to 'engines/tinsel/sched.h')
-rw-r--r--engines/tinsel/sched.h110
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