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engines/tony/mpal/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 TONY_MPAL_MEMORY
+#define TONY_MPAL_MEMORY
+
+#include "common/scummsys.h"
+#include "common/list.h"
+
+namespace Tony {
+
+namespace MPAL {
+
+typedef void *MpalHandle;
+
+struct MemoryItem {
+	uint32 _id;
+	uint32 _size;
+	int _lockCount;
+#ifndef NO_CXX11_ALIGNAS
+	alignas(max_align_t)
+#endif
+	byte _data[1];
+
+	// Casting for access to data
+	operator void *() { return &_data[0]; }
+};
+
+class MemoryManager {
+private:
+	static MemoryItem *getItem(MpalHandle handle);
+public:
+	static MpalHandle allocate(uint32 size, uint flags);
+	static void *alloc(uint32 size, uint flags);
+	static void freeBlock(MpalHandle handle);
+	static void destroyItem(MpalHandle handle);
+	static uint32 getSize(MpalHandle handle);
+	static void *lockItem(MpalHandle handle);
+	static void unlockItem(MpalHandle handle);
+};
+
+// defines
+#define globalAlloc(flags, size)    MemoryManager::alloc(size, flags)
+#define globalAllocate(flags, size) MemoryManager::allocate(size, flags)
+#define globalFree(handle)          MemoryManager::freeBlock(handle)
+#define globalDestroy(handle)       MemoryManager::destroyItem(handle)
+#define globalLock(handle)          MemoryManager::lockItem(handle)
+#define globalUnlock(handle)        MemoryManager::unlockItem(handle)
+#define globalSize(handle)          MemoryManager::getSize(handle)
+
+#define GMEM_FIXED 1
+#define GMEM_MOVEABLE 2
+#define GMEM_ZEROINIT 4
+
+const uint32 BLOCK_ID = 0x12345678;
+
+} // end of namespace MPAL
+
+} // end of namespace Tony
+
+#endif