brought back alloc.d

git-svn-id: https://sfml.svn.sourceforge.net/svnroot/sfml/branches/sfml2@1587 4e206d99-4929-0410-ac5d-dfc041789085

DSFML/import/dsfml/system/alloc.d

@@ -0,0 +1,84 @@
+/*
+*	DSFML - SFML Library wrapper for the D programming language.
+*	Copyright (C) 2008 Julien Dagorn (sirjulio13@gmail.com)
+*	Copyright (C) 2010 Andreas Hollandt
+*
+*	This software is provided 'as-is', without any express or
+*	implied warranty. In no event will the authors be held
+*	liable for any damages arising from the use of this software.
+*
+*	Permission is granted to anyone to use this software for any purpose,
+*	including commercial applications, and to alter it and redistribute
+*	it freely, subject to the following restrictions:
+*
+*	1.  The origin of this software must not be misrepresented;
+*		you must not claim that you wrote the original software.
+*		If you use this software in a product, an acknowledgment
+*		in the product documentation would be appreciated but
+*		is not required.
+*
+*	2.  Altered source versions must be plainly marked as such,
+*		and must not be misrepresented as being the original software.
+*
+*	3.  This notice may not be removed or altered from any
+*		source distribution.
+*/
+
+module dsfml.system.alloc;
+
+version (Tango)
+{
+	public import tango.core.Memory;
+}
+else
+{
+	public import core.memory;
+}
+
+/*
+	struct GC
+	{
+		static void* malloc(uint size)
+		{
+			return std.c.stdlib.malloc(size);
+		}
+	
+		static void free(void* ptr)
+		{
+			std.c.stdlib.free(ptr);
+		}
+	
+		static void addRange(void* ptr, uint size)
+		{
+			std.gc.addRange(ptr, ptr + size);
+		}
+	
+		static void removeRange(void* ptr)
+		{
+			std.gc.removeRange(ptr);
+		}
+	}
+
+*/
+
+/*
+*	Template for native non-GCed allocation for interaction between C and D threads.
+*/
+template Alloc()
+{
+	new (size_t size)
+	{
+		void* p = GC.malloc(size);
+		if (!p)
+			assert(0, "Memory allocation failed");
+		
+		GC.addRange(p, size);
+		return p;
+	}
+
+	delete(void* p)
+	{
+		GC.removeRange(p);
+		GC.free(p);
+	}
+}