commit e98c61a84c06395279399244de0bd009e53740db
Author: Thomas Schöpping <tschoepp@cit-ec.uni-bielefeld.de>
Date:   Mon Oct 22 17:01:07 2018 +0200

    Minor enhancement to the urtSubscriberFetchMessage() method.

diff --git a/doc/statediagrams/subscriber/urtSubscriberFetchMessage.svg b/doc/statediagrams/subscriber/urtSubscriberFetchMessage.svg
index ace4149..84f96d4 100644
--- a/doc/statediagrams/subscriber/urtSubscriberFetchMessage.svg
+++ b/doc/statediagrams/subscriber/urtSubscriberFetchMessage.svg
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" contentScriptType="application/ecmascript" contentStyleType="text/css" height="1455px" preserveAspectRatio="none" style="width:2068px;height:1455px;" version="1.1" viewBox="0 0 2068 1455" width="2068px" zoomAndPan="magnify"><defs><filter height="300%" id="f1f9rycf3tt47j" width="300%" x="-1" y="-1"><feGaussianBlur result="blurOut" stdDeviation="2.0"/><feColorMatrix in="blurOut" result="blurOut2" type="matrix" values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .4 0"/><feOffset dx="4.0" dy="4.0" in="blurOut2" result="blurOut3"/><feBlend in="SourceGraphic" in2="blurOut3" mode="normal"/></filter></defs><g><text fill="#000000" font-family="sans-serif" font-size="18" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="89" x="988.75" y="26.708">µRtWare</text><text fill="#000000" font-family="sans-serif" font-size="18" lengthAdjust="spacingAndGlyphs" textLength="256" x="905.25" y="47.6611">urtSubscriberFetchMessage()</text><text fill="#000000" font-family="sans-serif" font-size="18" lengthAdjust="spacingAndGlyphs" textLength="0" x="1036.25" y="68.6143"/><path d="M1096.25,72.8594 L1096.25,97.9922 A0,0 0 0 0 1096.25,97.9922 L1211.25,97.9922 A0,0 0 0 0 1211.25,97.9922 L1211.25,90.8594 L1231.25,85.4258 L1211.25,82.8594 L1211.25,82.8594 L1201.25,72.8594 L1096.25,72.8594 A0,0 0 0 0 1096.25,72.8594 " fill="#FBFB77" filter="url(#f1f9rycf3tt47j)" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M1201.25,72.8594 L1201.25,82.8594 L1211.25,82.8594 L1201.25,72.8594 " fill="#FBFB77" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="94" x="1102.25" y="89.9263">event received</text><ellipse cx="1241.25" cy="85.4258" fill="#000000" filter="url(#f1f9rycf3tt47j)" rx="10" ry="10" style="stroke: none; stroke-width: 1.0;"/><path d="M798.25,122.4102 L798.25,147.543 A0,0 0 0 0 798.25,147.543 L1181.25,147.543 A0,0 0 0 0 1181.25,147.543 L1181.25,140.4102 L1201.25,134.9766 L1181.25,132.4102 L1181.25,132.4102 L1171.25,122.4102 L798.25,122.4102 A0,0 0 0 0 798.25,122.4102 " fill="#FBFB77" filter="url(#f1f9rycf3tt47j)" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M1171.25,122.4102 L1171.25,132.4102 L1181.25,132.4102 L1171.25,122.4102 " fill="#FBFB77" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="362" x="804.25" y="139.4771">The message list is part of the topic and must be locked.</text><rect fill="#FEFECE" filter="url(#f1f9rycf3tt47j)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="80" x="1201.25" y="117.9922"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="60" x="1211.25" y="139.1309">lock topic</text><polygon fill="#FEFECE" filter="url(#f1f9rycf3tt47j)" points="1187.75,171.9609,1294.75,171.9609,1306.75,183.9609,1294.75,195.9609,1187.75,195.9609,1175.75,183.9609,1187.75,171.9609" style="stroke: #A80036; stroke-width: 1.5;"/><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="107" x="1187.75" y="187.769">Is HRT subscriber?</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="20" x="1155.75" y="181.3667">yes</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="14" x="1306.75" y="181.3667">no</text><rect fill="#FEFECE" filter="url(#f1f9rycf3tt47j)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="137" x="636.5" y="205.9609"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="117" x="646.5" y="227.0996">lock next message</text><rect fill="#FFFFFF" filter="url(#f1f9rycf3tt47j)" height="465.9175" style="stroke: #000000; stroke-width: 2.0;" width="1387" x="10" y="306.4419"/><path d="M124,307.4419 L124,315.7388 L114,325.7388 L10,325.7388 " fill="none" style="stroke: #000000; stroke-width: 2.0;"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="104" x="13" y="320.437">iterate to latest</text><path d="M413.5,347.1567 L413.5,372.2896 A0,0 0 0 0 413.5,372.2896 L616.5,372.2896 A0,0 0 0 0 616.5,372.2896 L616.5,365.1567 L636.5,359.7231 L616.5,357.1567 L616.5,357.1567 L606.5,347.1567 L413.5,347.1567 A0,0 0 0 0 413.5,347.1567 " fill="#FBFB77" filter="url(#f1f9rycf3tt47j)" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M606.5,347.1567 L606.5,357.1567 L616.5,357.1567 L606.5,347.1567 " fill="#FBFB77" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="182" x="419.5" y="364.2236">locked two messaged ahead</text><rect fill="#FEFECE" filter="url(#f1f9rycf3tt47j)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="137" x="636.5" y="342.7388"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="117" x="646.5" y="363.8774">lock next message</text><rect fill="#000000" filter="url(#f1f9rycf3tt47j)" height="6" rx="2.5" ry="2.5" style="stroke: #000000; stroke-width: 1.0;" width="1322" x="44" y="452.418"/><rect fill="#000000" filter="url(#f1f9rycf3tt47j)" height="6" rx="2.5" ry="2.5" style="stroke: #000000; stroke-width: 1.0;" width="1129" x="58" y="478.418"/><rect fill="#FEFECE" filter="url(#f1f9rycf3tt47j)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="304" x="72" y="504.418"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="284" x="82" y="525.5566">decremenet HRT counter of current message</text><path d="M404,508.8359 L404,533.9688 A0,0 0 0 0 404,533.9688 L893,533.9688 A0,0 0 0 0 893,533.9688 L893,526.8359 L913,521.4023 L893,518.8359 L893,518.8359 L883,508.8359 L404,508.8359 A0,0 0 0 0 404,508.8359 " fill="#FBFB77" filter="url(#f1f9rycf3tt47j)" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M883,508.8359 L883,518.8359 L893,518.8359 L883,508.8359 " fill="#FBFB77" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="468" x="410" y="525.9028">no lock required since this timer is only accessed when the topic is locked</text><rect fill="#FEFECE" filter="url(#f1f9rycf3tt47j)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="260" x="913" y="504.418"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="240" x="923" y="525.5566">update QoS delay timer (@subscriber)</text><rect fill="#000000" filter="url(#f1f9rycf3tt47j)" height="6" rx="2.5" ry="2.5" style="stroke: #000000; stroke-width: 1.0;" width="1129" x="58" y="558.3867"/><rect fill="#FEFECE" filter="url(#f1f9rycf3tt47j)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="172" x="536.5" y="594.8711"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="152" x="546.5" y="616.0098">unlock current message</text><rect fill="#FEFECE" filter="url(#f1f9rycf3tt47j)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="137" x="1215" y="538.9023"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="117" x="1225" y="560.041">lock next message</text><rect fill="#000000" filter="url(#f1f9rycf3tt47j)" height="6" rx="2.5" ry="2.5" style="stroke: #000000; stroke-width: 1.0;" width="1322" x="44" y="648.8398"/><polygon fill="#FEFECE" filter="url(#f1f9rycf3tt47j)" points="551,396.7075,859,396.7075,871,408.7075,859,420.7075,551,420.7075,539,408.7075,551,396.7075" style="stroke: #A80036; stroke-width: 1.5;"/><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="20" x="709" y="430.918">yes</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="308" x="551" y="412.5156">Timestamp of next message is younger than current?</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="14" x="525" y="406.1133">no</text><path d="M345.5,712.0938 L345.5,752.3594 A0,0 0 0 0 345.5,752.3594 L608.5,752.3594 A0,0 0 0 0 608.5,752.3594 L608.5,736.2266 L628.5,732.2266 L608.5,728.2266 L608.5,722.0938 L598.5,712.0938 L345.5,712.0938 A0,0 0 0 0 345.5,712.0938 " fill="#FBFB77" filter="url(#f1f9rycf3tt47j)" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M598.5,712.0938 L598.5,722.0938 L608.5,722.0938 L598.5,712.0938 " fill="#FBFB77" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="201" x="351.5" y="729.1606">one message ahead still locked</text><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="242" x="351.5" y="744.2935">but HRT counter not yet decremented</text><rect fill="#FEFECE" filter="url(#f1f9rycf3tt47j)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="153" x="628.5" y="715.2422"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="133" x="638.5" y="736.3809">unlock next message</text><polygon fill="#FEFECE" filter="url(#f1f9rycf3tt47j)" points="618.5,259.9297,791.5,259.9297,803.5,271.9297,791.5,283.9297,618.5,283.9297,606.5,271.9297,618.5,259.9297" style="stroke: #A80036; stroke-width: 1.5;"/><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="32" x="709" y="294.1401">latest</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="173" x="618.5" y="275.7378">Fetch next or latest message?</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="24" x="803.5" y="269.3354">next</text><polygon fill="#FEFECE" filter="url(#f1f9rycf3tt47j)" points="705,796.7617,717,808.7617,705,820.7617,693,808.7617,705,796.7617" style="stroke: #A80036; stroke-width: 1.5;"/><rect fill="#000000" filter="url(#f1f9rycf3tt47j)" height="6" rx="2.5" ry="2.5" style="stroke: #000000; stroke-width: 1.0;" width="1121" x="144.5" y="855.7617"/><rect fill="#FEFECE" filter="url(#f1f9rycf3tt47j)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="296" x="158.5" y="881.7617"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="276" x="168.5" y="902.9004">decrement HRT counter of current message</text><path d="M482.5,886.1797 L482.5,911.3125 A0,0 0 0 0 482.5,911.3125 L971.5,911.3125 A0,0 0 0 0 971.5,911.3125 L971.5,904.1797 L991.5,898.7461 L971.5,896.1797 L971.5,896.1797 L961.5,886.1797 L482.5,886.1797 A0,0 0 0 0 482.5,886.1797 " fill="#FBFB77" filter="url(#f1f9rycf3tt47j)" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M961.5,886.1797 L961.5,896.1797 L971.5,896.1797 L961.5,886.1797 " fill="#FBFB77" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="468" x="488.5" y="903.2466">no lock required since this timer is only accessed when the topic is locked</text><rect fill="#FEFECE" filter="url(#f1f9rycf3tt47j)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="260" x="991.5" y="881.7617"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="240" x="1001.5" y="902.9004">update QoS delay timer (@subscriber)</text><rect fill="#000000" filter="url(#f1f9rycf3tt47j)" height="6" rx="2.5" ry="2.5" style="stroke: #000000; stroke-width: 1.0;" width="1121" x="144.5" y="935.7305"/><rect fill="#FEFECE" filter="url(#f1f9rycf3tt47j)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="166" x="1694.5" y="205.9609"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="146" x="1704.5" y="227.0996">lock last read message</text><rect fill="#FFFFFF" filter="url(#f1f9rycf3tt47j)" height="340.3979" style="stroke: #000000; stroke-width: 2.0;" width="516" x="1516.5" y="306.4419"/><path d="M1700.5,307.4419 L1700.5,315.7388 L1690.5,325.7388 L1516.5,325.7388 " fill="none" style="stroke: #000000; stroke-width: 2.0;"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="174" x="1519.5" y="320.437">find oldest valid message</text><rect fill="#FEFECE" filter="url(#f1f9rycf3tt47j)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="137" x="1709" y="342.7388"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="117" x="1719" y="363.8774">lock next message</text><rect fill="#000000" filter="url(#f1f9rycf3tt47j)" height="6" rx="2.5" ry="2.5" style="stroke: #000000; stroke-width: 1.0;" width="454" x="1550.5" y="452.418"/><rect fill="#FEFECE" filter="url(#f1f9rycf3tt47j)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="165" x="1564.5" y="478.418"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="145" x="1574.5" y="499.5566">unlock current mesage</text><rect fill="#FEFECE" filter="url(#f1f9rycf3tt47j)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="233" x="1757.5" y="478.418"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="213" x="1767.5" y="499.5566">lock one message further ahaead</text><rect fill="#000000" filter="url(#f1f9rycf3tt47j)" height="6" rx="2.5" ry="2.5" style="stroke: #000000; stroke-width: 1.0;" width="454" x="1550.5" y="532.3867"/><polygon fill="#FEFECE" filter="url(#f1f9rycf3tt47j)" points="1644.5,396.7075,1910.5,396.7075,1922.5,408.7075,1910.5,420.7075,1644.5,420.7075,1632.5,408.7075,1644.5,396.7075" style="stroke: #A80036; stroke-width: 1.5;"/><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="20" x="1781.5" y="430.918">yes</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="266" x="1644.5" y="412.5156">Timestamp of next is younger then of current?</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="14" x="1618.5" y="406.1133">no</text><rect fill="#FEFECE" filter="url(#f1f9rycf3tt47j)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="153" x="1701" y="592.8711"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="133" x="1711" y="614.0098">unlock next message</text><polygon fill="#FEFECE" filter="url(#f1f9rycf3tt47j)" points="1691.5,259.9297,1863.5,259.9297,1875.5,271.9297,1863.5,283.9297,1691.5,283.9297,1679.5,271.9297,1691.5,259.9297" style="stroke: #A80036; stroke-width: 1.5;"/><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="14" x="1781.5" y="294.1401">no</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="172" x="1691.5" y="275.7378">Timestamp equals local copy?</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="20" x="1875.5" y="269.3354">yes</text><polygon fill="#FEFECE" filter="url(#f1f9rycf3tt47j)" points="1777.5,671.2422,1789.5,683.2422,1777.5,695.2422,1765.5,683.2422,1777.5,671.2422" style="stroke: #A80036; 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stroke-width: 1.0;"/><path d="M883,508.8359 L883,518.8359 L893,518.8359 L883,508.8359 " fill="#FBFB77" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="468" x="410" y="525.9028">no lock required since this timer is only accessed when the topic is locked</text><rect fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="260" x="913" y="504.418"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="240" x="923" y="525.5566">update QoS delay timer (@subscriber)</text><rect fill="#000000" filter="url(#fdtyyj52i0mr8)" height="6" rx="2.5" ry="2.5" style="stroke: #000000; stroke-width: 1.0;" width="1129" x="58" y="558.3867"/><rect fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="172" x="536.5" y="594.8711"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="152" x="546.5" y="616.0098">unlock current message</text><rect fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="137" x="1215" y="538.9023"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="117" x="1225" y="560.041">lock next message</text><rect fill="#000000" filter="url(#fdtyyj52i0mr8)" height="6" rx="2.5" ry="2.5" style="stroke: #000000; stroke-width: 1.0;" width="1322" x="44" y="648.8398"/><polygon fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" points="551,396.7075,859,396.7075,871,408.7075,859,420.7075,551,420.7075,539,408.7075,551,396.7075" style="stroke: #A80036; stroke-width: 1.5;"/><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="20" x="709" y="430.918">yes</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="308" x="551" y="412.5156">Timestamp of next message is younger than current?</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="14" x="525" y="406.1133">no</text><path d="M345.5,712.0938 L345.5,752.3594 A0,0 0 0 0 345.5,752.3594 L608.5,752.3594 A0,0 0 0 0 608.5,752.3594 L608.5,736.2266 L628.5,732.2266 L608.5,728.2266 L608.5,722.0938 L598.5,712.0938 L345.5,712.0938 A0,0 0 0 0 345.5,712.0938 " fill="#FBFB77" filter="url(#fdtyyj52i0mr8)" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M598.5,712.0938 L598.5,722.0938 L608.5,722.0938 L598.5,712.0938 " fill="#FBFB77" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="201" x="351.5" y="729.1606">one message ahead still locked</text><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="242" x="351.5" y="744.2935">but HRT counter not yet decremented</text><rect fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="153" x="628.5" y="715.2422"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="133" x="638.5" y="736.3809">unlock next message</text><polygon fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" points="618.5,259.9297,791.5,259.9297,803.5,271.9297,791.5,283.9297,618.5,283.9297,606.5,271.9297,618.5,259.9297" style="stroke: #A80036; stroke-width: 1.5;"/><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="32" x="709" y="294.1401">latest</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="173" x="618.5" y="275.7378">Fetch next or latest message?</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="24" x="803.5" y="269.3354">next</text><polygon fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" points="705,796.7617,717,808.7617,705,820.7617,693,808.7617,705,796.7617" style="stroke: #A80036; stroke-width: 1.5;"/><rect fill="#000000" filter="url(#fdtyyj52i0mr8)" height="6" rx="2.5" ry="2.5" style="stroke: #000000; stroke-width: 1.0;" width="1121" x="144.5" y="855.7617"/><rect fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="296" x="158.5" y="881.7617"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="276" x="168.5" y="902.9004">decrement HRT counter of current message</text><path d="M482.5,886.1797 L482.5,911.3125 A0,0 0 0 0 482.5,911.3125 L971.5,911.3125 A0,0 0 0 0 971.5,911.3125 L971.5,904.1797 L991.5,898.7461 L971.5,896.1797 L971.5,896.1797 L961.5,886.1797 L482.5,886.1797 A0,0 0 0 0 482.5,886.1797 " fill="#FBFB77" filter="url(#fdtyyj52i0mr8)" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M961.5,886.1797 L961.5,896.1797 L971.5,896.1797 L961.5,886.1797 " fill="#FBFB77" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="468" x="488.5" y="903.2466">no lock required since this timer is only accessed when the topic is locked</text><rect fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="260" x="991.5" y="881.7617"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="240" x="1001.5" y="902.9004">update QoS delay timer (@subscriber)</text><rect fill="#000000" filter="url(#fdtyyj52i0mr8)" height="6" rx="2.5" ry="2.5" style="stroke: #000000; stroke-width: 1.0;" width="1121" x="144.5" y="935.7305"/><rect fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="166" x="1694.5" y="205.9609"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="146" x="1704.5" y="227.0996">lock last read message</text><rect fill="#FFFFFF" filter="url(#fdtyyj52i0mr8)" height="340.3979" style="stroke: #000000; stroke-width: 2.0;" width="516" x="1516.5" y="306.4419"/><path d="M1700.5,307.4419 L1700.5,315.7388 L1690.5,325.7388 L1516.5,325.7388 " fill="none" style="stroke: #000000; stroke-width: 2.0;"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="174" x="1519.5" y="320.437">find oldest valid message</text><rect fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="137" x="1709" y="342.7388"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="117" x="1719" y="363.8774">lock next message</text><rect fill="#000000" filter="url(#fdtyyj52i0mr8)" height="6" rx="2.5" ry="2.5" style="stroke: #000000; stroke-width: 1.0;" width="454" x="1550.5" y="452.418"/><rect fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="165" x="1564.5" y="478.418"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="145" x="1574.5" y="499.5566">unlock current mesage</text><rect fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="233" x="1757.5" y="478.418"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="213" x="1767.5" y="499.5566">lock one message further ahaead</text><rect fill="#000000" filter="url(#fdtyyj52i0mr8)" height="6" rx="2.5" ry="2.5" style="stroke: #000000; stroke-width: 1.0;" width="454" x="1550.5" y="532.3867"/><polygon fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" points="1644.5,396.7075,1910.5,396.7075,1922.5,408.7075,1910.5,420.7075,1644.5,420.7075,1632.5,408.7075,1644.5,396.7075" style="stroke: #A80036; stroke-width: 1.5;"/><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="20" x="1781.5" y="430.918">yes</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="266" x="1644.5" y="412.5156">Timestamp of next is younger then of current?</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="14" x="1618.5" y="406.1133">no</text><rect fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="153" x="1701" y="592.8711"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="133" x="1711" y="614.0098">unlock next message</text><polygon fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" points="1691.5,259.9297,1863.5,259.9297,1875.5,271.9297,1863.5,283.9297,1691.5,283.9297,1679.5,271.9297,1691.5,259.9297" style="stroke: #A80036; stroke-width: 1.5;"/><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="14" x="1781.5" y="294.1401">no</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="172" x="1691.5" y="275.7378">Timestamp equals local copy?</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="20" x="1875.5" y="269.3354">yes</text><polygon fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" points="1777.5,671.2422,1789.5,683.2422,1777.5,695.2422,1765.5,683.2422,1777.5,671.2422" style="stroke: #A80036; stroke-width: 1.5;"/><rect fill="#FFFFFF" filter="url(#fdtyyj52i0mr8)" height="340.0078" style="stroke: #000000; stroke-width: 2.0;" width="542" x="1449" y="776.8984"/><path d="M1563,777.8984 L1563,786.1953 L1553,796.1953 L1449,796.1953 " fill="none" style="stroke: #000000; stroke-width: 2.0;"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="104" x="1452" y="790.8936">iterate to latest</text><rect fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="137" x="1709" y="813.1953"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="117" x="1719" y="834.334">lock next message</text><rect fill="#000000" filter="url(#fdtyyj52i0mr8)" height="6" rx="2.5" ry="2.5" style="stroke: #000000; stroke-width: 1.0;" width="365" x="1595" y="942.9688"/><rect fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="172" x="1609" y="968.9688"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="152" x="1619" y="990.1074">unlock current message</text><rect fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="137" x="1809" y="968.9688"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="117" x="1819" y="990.1074">lock next message</text><rect fill="#000000" filter="url(#fdtyyj52i0mr8)" height="6" rx="2.5" ry="2.5" style="stroke: #000000; stroke-width: 1.0;" width="365" x="1595" y="1022.9375"/><polygon fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" points="1623.5,882.1641,1931.5,882.1641,1943.5,894.1641,1931.5,906.1641,1623.5,906.1641,1611.5,894.1641,1623.5,882.1641" style="stroke: #A80036; stroke-width: 1.5;"/><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="20" x="1781.5" y="916.3745">yes</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="308" x="1623.5" y="897.9722">Timestamp of next message is younger then current?</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="14" x="1597.5" y="891.5698">no</text><path d="M1459,1075.3555 L1459,1100.4883 A0,0 0 0 0 1459,1100.4883 L1681,1100.4883 A0,0 0 0 0 1681,1100.4883 L1681,1093.3555 L1701,1087.9219 L1681,1085.3555 L1681,1085.3555 L1671,1075.3555 L1459,1075.3555 A0,0 0 0 0 1459,1075.3555 " fill="#FBFB77" filter="url(#fdtyyj52i0mr8)" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M1671,1075.3555 L1671,1085.3555 L1681,1085.3555 L1671,1075.3555 " fill="#FBFB77" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="201" x="1465" y="1092.4224">one message ahead still locked</text><rect fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="153" x="1701" y="1070.9375"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="133" x="1711" y="1092.0762">unlock next message</text><polygon fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" points="1691,728.4961,1864,728.4961,1876,740.4961,1864,752.4961,1691,752.4961,1679,740.4961,1691,728.4961" style="stroke: #A80036; stroke-width: 1.5;"/><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="32" x="1781.5" y="762.7065">latest</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="173" x="1691" y="744.3042">Fetch next or latest message?</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="24" x="1876" y="737.9019">next</text><polygon fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" points="1777.5,1136.9063,1789.5,1148.9063,1777.5,1160.9063,1765.5,1148.9063,1777.5,1136.9063" style="stroke: #A80036; stroke-width: 1.5;"/><polygon fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" points="1241.25,1166.9063,1253.25,1178.9063,1241.25,1190.9063,1229.25,1178.9063,1241.25,1166.9063" style="stroke: #A80036; stroke-width: 1.5;"/><rect fill="#000000" filter="url(#fdtyyj52i0mr8)" height="6" rx="2.5" ry="2.5" style="stroke: #000000; stroke-width: 1.0;" width="827" x="827.75" y="1210.9063"/><rect fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="352" x="841.75" y="1285.3086"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="332" x="851.75" y="1306.4473">set last fetched message pointer to locked message</text><rect fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="196" x="1221.75" y="1285.3086"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="176" x="1231.75" y="1306.4473">copy timestamp of message</text><rect fill="#FEFECE" filter="url(#fdtyyj52i0mr8)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; 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 @startuml
 
 title **µRtWare**\nurtSubscriberFetchMessage()\n
@@ -90,6 +90,11 @@ fork
   :set last fetched message pointer to locked message;
 fork again
   :copy timestamp of message;
+fork again
+  if (Copy of payload requested?) then (yes)
+    :copy message payload;
+  else (no)
+  endif
 endfork
 :unlock message;
 :unlock topic;
