Added the key end to \TaskExecution and \TaskExecDelta so to draw a circle

at the end of the rectangle to denote end of the instance.

rtsched-doc.tex

   \label{fig:resp-time}
 \end{figure}
 
-It is sometimes useful to represent the end of a job execution, especially to distinguish it from preemption. In that case, you can use the following command :
+It is sometimes useful to represent the end of a job execution,
+especially to distinguish it from preemption. In that case, you can
+use the following command :
 
 \begin{verbatim}
 \TaskEnd{i}{t}
 \end{verbatim}
 
-and its periodic version detailed in Table~\ref{tab:periodic_versions} that draw little circle(s) at the specified date(s). It works in the same way as \verb+\TaskArrival+ command as shown in Figure~\ref{fig:ex1a}.
-
+\noindent and its periodic version detailed in
+Table~\ref{tab:periodic_versions} that draw little circle(s) at the
+specified date(s). It works in the same way as \verb+\TaskArrival+
+command as shown in Figure~\ref{fig:ex1a}. 
+Alternatively, you can also add the \texttt{end=1} key to the
+\texttt{TaskExecution} command as follows:
 
+\begin{verbatim}
+\TaskExecution[end=1]{1}{10}{12}
+\TaskExecDelta[end=1]{1}{10}{2}.
+\end{verbatim}
 
 
 \subsection{Controlling visualization}

rtsched.sty

 \def\RTDefLineWidth{1pt}
 \def\RTDefLineStyle{solid}
 \def\RTDefExecHeight{1}
-\def\RTArrowStyle{stealth} %arrow style for deadlines, arrivals and horizontal axes
+\def\RTArrowStyle{stealth}
+%arrow style for deadlines, arrivals and horizontal axes
 % -{Triangle 45}[length=x] with length is a more modern arrow style but requires arrows.meta tikz library (available on latest texlive but rarely up to date on linux distribution)
 %-stealth is a predefined more classical arrow style
+\def\RTDefEndInstance{0} 
 
 \def\RTExecLabel{\ }
 \def\RTTaskSymbol{\RTDefTaskSymbol}
 \def\RTLineWidth{\RTDefLineWidth}
 \def\RTLineStyle{\RTDefLineStyle}
 \def\RTExecHeight{\RTDefExecHeight}
-
-
-
+\def\RTEndInstance{\RTDefEndInstance}
 
 \define@key{RT}{height}[\RTNullWindowHeight]{\def\RTWindowHeight{#1}}
 \define@key{RT}{width}[10]{\def\RTWindowLength{#1}}
 \define@key{RT}{lw}[\RTDefLineWidth]{\def\RTLineWidth{#1}}
 \define@key{RT}{style}[\RTDefLineStyle]{\def\RTLineStyle{#1}}
 \define@key{RT}{exeheight}[\RTDefExecHeight]{\def\RTExecHeight{#1}}
+\define@key{RT}{end}[\RTDefEndInstance]{\def\RTEndInstance{#1}}
 
 
 %%
 \newdimen\yy % y position
 \newdimen\xxx % x position
 \newdimen\yyy % y position
+\newdimen\xtmp % x position
 \newcount\nsx % number of horizontal slots
 \newcount\nsy % number of vertical slots
 \newcount\nhl % number of horizontal lines
   \setkeys{RT}{linecolor}%
   \setkeys{RT}{xscale}%
   \setkeys{RT}{nosymbols}%
+  \setkeys{RT}{end}%
 }
 
 \def\@RTExecDefaultValues{
   \setkeys{RT}{color}%
   \setkeys{RT}{execlabel}%
   \setkeys{RT}{linecolor}%
+  \setkeys{RT}{end}%
 }
 
 \def\RTGridEnd{
   \@compute@xx{#3}
   \yyy = \yy \advance \yyy by 2\sy
   \begin{pgfonlayer}{foreground} 
-  \draw [\RTLineColor, thick, \RTArrowStyle-] (\xx,\yy) -- (\xx,\yyy);
+  \draw [\RTLineStyle, \RTLineColor, thick, \RTArrowStyle-] (\xx,\yy) -- (\xx,\yyy);
   \end{pgfonlayer}
   \@RTExecDefaultValues
 }
   \advance \xx by \xxx \xx = .5\xx
   \advance \yy by .5\RTExecHeight\sy
   \draw (\xx,\yy) node[font=\rtfont] {\RTNumberLabelSize \RTExecLabel};%\RTNumberLabelSize
+   \if\RTEndInstance\RTDefEndInstance
+     \relax
+   \else 
+     \begin{pgfonlayer}{foreground} 
+       \draw[\RTLineColor, fill] (\xxx,\yyy) circle (1.5pt);
+     \end{pgfonlayer}
+   \fi
+
   \@RTExecDefaultValues
 }
 %
 }
 
 % TaskEnd
-% Task end: draws a circle when the job terminates
+% Task end: draws a circle, typically to indicate job termination
+% (see also the end key in \TaskExecDelta and \TaskExecution)
 % par 1: task number from 1 to n
 % par 2: slot number from 0 to l-1
 \newcommand{\TaskEnd}[3][nocommand=1]{%
   \setkeys{RT}{#1}%
   \@compute@yy{#2}
   \@compute@xx{#3}
-  \yyy = \yy \advance \yyy by 2\sy%
+  \yyy = \yy \advance \yyy by \sy%
   \begin{pgfonlayer}{foreground} 
-  \draw[fill] (\xx,\yy) circle (1.5pt);
+  \draw[\RTLineColor, fill=\RTTaskColor] (\xx,\yyy) circle (1.5pt);
   \end{pgfonlayer}
   \@RTExecDefaultValues%
 }
    \draw [fill=\RTTaskColor,\RTTaskFill,draw=\RTLineColor, thick] (\xx,\yy) rectangle (\xxx,\yyy);
   \advance \xx by \xxx \xx = .5\xx
    \draw (\xx,\yy) node[above, font=\rtfont] {\RTTaskLabelSize \RTExecLabel}; %\RTNumberLabelSize
+   \if\RTEndInstance\RTDefEndInstance
+     \relax
+   \else 
+     \begin{pgfonlayer}{foreground} 
+       \draw[\RTLineColor, fill] (\xxx,\yyy) circle (1.5pt);
+     \end{pgfonlayer}
+   \fi
   \@RTExecDefaultValues
 }
 
 }
 
 
-
 % 
 % TaskRespTime
 % par 1:  task
   \renewcommand<>{\TaskExecDelta}[4][nocommand=1]{
     \only#5{\beameroriginal{\TaskExecDelta}[#1]{#2}{#3}{#4}}
   }
+  \renewcommand<>{\TaskExecDeltaEnd}[4][nocommand=1]{
+    \only#5{\beameroriginal{\TaskExecDeltaEnd}[#1]{#2}{#3}{#4}}
+  }
   \renewcommand<>{\TaskNExecDelta}[6][nocommand=1]{
     \only#7{\beameroriginal{\TaskNExecDelta}[#1]{#2}{#3}{#4}{#5}{#6}}
   }