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engines/tinsel/heapmem.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/>.
+ *
+ * This file contains the handle based Memory Manager defines
+ */
+
+#ifndef TINSEL_HEAPMEM_H
+#define TINSEL_HEAPMEM_H
+
+#include "tinsel/dw.h"		// new data types
+
+namespace Tinsel {
+
+struct MEM_NODE;
+
+
+/*----------------------------------------------------------------------*\
+|*			Memory Function Prototypes			*|
+\*----------------------------------------------------------------------*/
+
+void MemoryInit();			// initializes the memory manager
+void MemoryDeinit();		// deinitializes the memory manager
+
+// reserves a memory node for a movable & discardable block
+MEM_NODE *MemoryNoAlloc();
+
+// allocates a fixed block with the specified number of bytes
+MEM_NODE *MemoryAllocFixed(long size);
+
+void MemoryDiscard(		// discards the specified memory object
+	MEM_NODE *pMemNode);	// node of the memory object
+
+void *MemoryLock(		// locks a memory object and returns a pointer to the first byte of the objects memory block
+	MEM_NODE *pMemNode);	// node of the memory object
+
+void MemoryReAlloc(	// changes the size or attributes of a specified memory object
+	MEM_NODE *pMemNode,	// node of the memory object
+	long size);		// new size of block
+
+void MemoryUnlock(		// unlocks a memory object
+	MEM_NODE *pMemNode);	// node of the memory object
+
+// 'touch' the memory object, i.e., update its "least recently used" counter.
+void MemoryTouch(MEM_NODE *pMemNode);
+
+// Dereference a given memory node
+uint8 *MemoryDeref(MEM_NODE *pMemNode);
+
+} // End of namespace Tinsel
+
+#endif