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engines/sword1/memman.h

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+/* 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef SWORD1_MEMMAN_H
+#define SWORD1_MEMMAN_H
+
+#include "common/scummsys.h"
+
+namespace Sword1 {
+
+struct MemHandle {
+	void *data;
+	uint32 size;
+	uint32 refCount;
+	uint16 cond;
+	MemHandle *next, *prev;
+};
+// mem conditions:
+#define MEM_FREED       0
+#define MEM_CAN_FREE    1
+#define MEM_DONT_FREE   2
+
+#define MAX_ALLOC (6*1024*1024) // max amount of mem we want to alloc().
+
+class MemMan {
+public:
+	MemMan();
+	~MemMan();
+	void alloc(MemHandle *bsMem, uint32 pSize, uint16 pCond = MEM_DONT_FREE);
+	void setCondition(MemHandle *bsMem, uint16 pCond);
+	void freeNow(MemHandle *bsMem);
+	void initHandle(MemHandle *bsMem);
+	void flush();
+private:
+	void addToFreeList(MemHandle *bsMem);
+	void removeFromFreeList(MemHandle *bsMem);
+	void checkMemoryUsage();
+	uint32 _alloced;  //currently allocated memory
+	MemHandle *_memListFree;
+	MemHandle *_memListFreeEnd;
+};
+
+} // End of namespace Sword1
+
+#endif //MEMMAN_H