Merge in channels from love-experiments

Rewritten love.thread and changed communication
method from weird system before, to channels.

--HG--
branch : minor

src/modules/thread/Channel.h

@@ -0,0 +1,61 @@
+/**
+* Copyright (c) 2006-2012 LOVE Development Team
+*
+* 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.
+**/
+
+#ifndef LOVE_THREAD_CHANNEL_H
+#define LOVE_THREAD_CHANNEL_H
+
+// STL
+#include <queue>
+#include <string>
+
+// LOVE
+#include <common/Variant.h>
+#include <thread/threads.h>
+
+namespace love
+{
+namespace thread
+{
+	class Channel : public love::Object
+	{
+	private:
+		Mutex *mutex;
+		Conditional *cond;
+		std::queue<Variant*> queue;
+		bool named;
+		std::string name;
+		Channel(const std::string &name);
+
+	public:
+		Channel();
+		~Channel();
+		static Channel *getChannel(const std::string &name);
+
+		void push(Variant *var);
+		Variant *pop();
+		Variant *demand();
+		Variant *peek();
+		int count();
+		void clear();
+	}; // Channel
+} // thread
+} // love
+
+#endif // LOVE_THREAD_CHANNEL_H