Move interfaces to subdir

include/sta/signal.hpp

@@ -1,40 +0,0 @@
-/**
- * @brief Signal interface definition.
- */
-#ifndef STA_SIGNAL_HPP
-#define STA_SIGNAL_HPP
-
-
-namespace sta
-{
-	/**
-	 * @brief Interface for signal objects.
-	 */
-	class Signal
-	{
-	public:
-		/**
-		 * @brief Enter signaled state.
-		 */
-		virtual void notify() = 0;
-		/**
-		 * @brief Check signal state w/o changing it.
-		 *
-		 * @return True if in signaled state
-		 */
-		virtual bool peek() = 0;
-		/**
-		 * @brief Check signal state.
-		 *
-		 * @return True if in signaled state
-		 */
-		virtual bool test() = 0;
-		/**
-		 * @brief Wait until signaled state is entered.
-		 */
-		virtual void wait() = 0;
-	};
-} // namespace sta
-
-
-#endif // STA_SIGNAL_HPP