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engines/lastexpress/memory.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 LASTEXPRESS_MEMORY_H
+#define LASTEXPRESS_MEMORY_H
+
+#include "common/scummsys.h"
+
+#include "lastexpress/lastexpress.h"
+
+namespace LastExpress {
+
+class LastExpressEngine;
+
+struct MemPage {
+	void *memPagePtr;
+	uint32 memPageSize;
+	int32 character;
+	char pageName[81];
+	bool allocatedFlag;
+
+	MemPage() {
+		memPagePtr = nullptr;
+		memPageSize = 0;
+		character = 0;
+		memset(pageName, 0, sizeof(pageName));
+		allocatedFlag = false;
+	}
+
+	void copyFrom(MemPage other) {
+		memPagePtr = other.memPagePtr;
+		memPageSize = other.memPageSize;
+		character = other.character;
+		memcpy(pageName, other.pageName, sizeof(pageName));
+		allocatedFlag = other.allocatedFlag;
+	}
+};
+
+enum MemoryFlags {
+	kMemoryFlagInit    = 0x1,
+	kMemoryFlagFXFree  = 0x2,
+	kMemoryFlagSeqFree = 0x4,
+};
+
+class MemoryManager {
+public:
+	MemoryManager(LastExpressEngine *engine);
+	~MemoryManager() {}
+
+	void initMem();
+	void *allocMem(uint32 size, const char *name, int character);
+	void freeMem(void *data);
+	void releaseMemory();
+	void freeFX();
+	void lockFX();
+	void lockSeqMem(uint32 size);
+	void freeSeqMem();
+	Seq *copySeq(Seq *sequenceToCopy);
+
+private:
+	LastExpressEngine *_engine = nullptr;
+
+	int32 _nisSeqMemFlag = 0;
+	MemPage _memoryPages[128];
+	int _numAllocatedMemPages = 1;
+	int32 _nisSeqMemAvailForLocking = 0;
+};
+
+} // End of namespace LastExpress
+
+#endif // LASTEXPRESS_MEMORY_H