new layout

[msc-thesis1617.git] / methods.top.tex

diff --git a/methods.top.tex b/methods.top.tex
index 174a783..bc94003 100644 (file)
--- a/methods.top.tex
+++ b/methods.top.tex
@@ -87,8 +87,8 @@ basic combinators are shown in Listing~\ref{lst:combinators}.
         onValue (Value a _)     = Just (f a)
         onValue _               = Nothing
 
-               onStable (Value a True) = Just (f a)
-               onStable _              = Nothing
+        onStable (Value a True) = Just (f a)
+        onStable _              = Nothing
                \end{lstlisting}
        \item Parallel:
 
@@ -118,4 +118,23 @@ basic combinators are shown in Listing~\ref{lst:combinators}.
 \end{lstlisting}
 
 \subsection{\acrlongpl{SDS}}
+\Glspl{SDS} are an abstraction over resources that are available in the world
+or in the \gls{iTasks} system. The shared data can be a file on disk, it can be
+the time, a random integer or just some data stored in memory. The actual
+\gls{SDS} is just a record containing functions on how to read and write the
+source. In these functions the \CI{*World} is available and therefore it can
+interact with the outside world. The \CI{*IWorld} is also available and
+therefore the functions can also access other shares, possibly combining them.
+
+The basic operations for \glspl{SDS} are get, set and update. The signatures
+for these functions are shown in Listing~\ref{lst:shares}. All of the
+operations are atomic in the sense that during reading no other tasks are
+executed.
+
+\begin{lstlisting}[%
+       language=Clean,label={lst:shares},caption={\Gls{SDS} functions}]
+get ::          (ReadWriteShared r w)           -> Task r | iTask r
+set :: w        (ReadWriteShared r w)           -> Task w | iTask w
+upd :: (r -> w) (ReadWriteShared r w)           -> Task w | iTask r & iTask w
 
+\end{lstlisting}