urtware / doc / activitydiagrams / subscriber / hrtsubscriber / urtHrtSubscriberFetchLatestMessage.svg @ 60da7a2f
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| 1 | e7056e1b | skenneweg | <?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="1900px" preserveAspectRatio="none" style="width:1792px;height:1900px;" version="1.1" viewBox="0 0 1792 1900" width="1792px" zoomAndPan="magnify"><defs><filter height="300%" id="f15mjsst8r4upa" 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="850.5" y="26.708">µRtWare</text><text fill="#000000" font-family="sans-serif" font-size="18" lengthAdjust="spacingAndGlyphs" textLength="338" x="726" y="47.6611">urtHrtSubscriberFetchLatestMessage()</text><text fill="#000000" font-family="sans-serif" font-size="18" lengthAdjust="spacingAndGlyphs" textLength="0" x="898" y="68.6143"/><path d="M899.25,72.8594 L899.25,334.9844 L1588.25,334.9844 L1588.25,82.8594 L1578.25,72.8594 L899.25,72.8594 " fill="#FBFB77" filter="url(#f15mjsst8r4upa)" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M1578.25,72.8594 L1578.25,82.8594 L1588.25,82.8594 L1578.25,72.8594 " fill="#FBFB77" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0;" x1="899.25" x2="1130.75" y1="85.4258" y2="85.4258"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="0" x="1134.75" y="89.4263"/><text fill="#000000" font-family="sans-serif" font-size="13" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="78" x="1134.75" y="89.4263">subscriber</text><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="136" x="1216.75" y="89.4263">: urt_hrtsubscriber_t*</text><line style="stroke: #A80036; stroke-width: 1.0;" x1="1356.75" x2="1588.25" y1="85.4258" y2="85.4258"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="313" x="905.25" y="105.0591">The HRT subscriber that shall fetch the message.</text><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="76" x="905.25" y="120.1919">Must not be</text><text fill="#000000" font-family="monospace" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="32" x="985.25" y="120.1919">NULL</text><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="4" x="1017.25" y="120.1919">.</text><line style="stroke: #A80036; stroke-width: 1.0;" x1="899.25" x2="1187.75" y1="130.8242" y2="130.8242"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="0" x="1191.75" y="134.8247"/><text fill="#000000" font-family="sans-serif" font-size="13" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="59" x="1191.75" y="134.8247">payload</text><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="41" x="1254.75" y="134.8247">: void*</text><line style="stroke: #A80036; stroke-width: 1.0;" x1="1299.75" x2="1588.25" y1="130.8242" y2="130.8242"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="238" x="905.25" y="150.4575">Pointer where to copy the payload to.</text><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="46" x="905.25" y="165.5903">May be</text><text fill="#000000" font-family="monospace" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="32" x="955.25" y="165.5903">NULL</text><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="195" x="991.25" y="165.5903">for messages without payload.</text><line style="stroke: #A80036; stroke-width: 1.0;" x1="899.25" x2="1194.75" y1="176.2227" y2="176.2227"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="0" x="1198.75" y="180.2231"/><text fill="#000000" font-family="sans-serif" font-size="13" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="41" x="1198.75" y="180.2231">bytes</text><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="45" x="1243.75" y="180.2231">: size_t</text><line style="stroke: #A80036; stroke-width: 1.0;" x1="1292.75" x2="1588.25" y1="176.2227" y2="176.2227"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="137" x="905.25" y="195.856">Payload size in bytes.</text><line style="stroke: #A80036; stroke-width: 1.0;" x1="899.25" x2="1168.25" y1="206.4883" y2="206.4883"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="0" x="1172.25" y="210.4888"/><text fill="#000000" font-family="sans-serif" font-size="13" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="53" x="1172.25" y="210.4888">latency</text><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="86" x="1229.25" y="210.4888">: urt_delay_t*</text><line style="stroke: #A80036; stroke-width: 1.0;" x1="1319.25" x2="1588.25" y1="206.4883" y2="206.4883"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="267" x="905.25" y="226.1216">The latency can be returned by reference.</text><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="46" x="905.25" y="241.2544">May be</text><text fill="#000000" font-family="monospace" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="32" x="955.25" y="241.2544">NULL</text><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="4" x="987.25" y="241.2544">.</text><line style="stroke: #A80036; stroke-width: 1.0;" x1="899.25" x2="1588.25" y1="249.3203" y2="249.3203"/><line style="stroke: #A80036; stroke-width: 1.0;" x1="899.25" x2="1588.25" y1="251.3203" y2="251.3203"/><line style="stroke: #A80036; stroke-width: 1.0;" x1="899.25" x2="1172.75" y1="261.8867" y2="261.8867"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="0" x="1176.75" y="265.8872"/><text fill="#000000" font-family="sans-serif" font-size="13" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="45" x="1176.75" y="265.8872">return</text><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="85" x="1225.75" y="265.8872">: urt_status_t</text><line style="stroke: #A80036; stroke-width: 1.0;" x1="1314.75" x2="1588.25" y1="261.8867" y2="261.8867"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="49" x="905.25" y="281.52">Returns</text><text fill="#000000" font-family="monospace" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="104" x="958.25" y="281.52">URT_STATUS_OK</text><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="75" x="1066.25" y="281.52">on success.</text><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="49" x="905.25" y="296.6528">Returns</text><text fill="#000000" font-family="monospace" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="192" x="958.25" y="296.6528">URT_STATUS_FETCH_NOTOPIC</text><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="282" x="1154.25" y="296.6528">if the subscriber is not associated to a topic.</text><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="49" x="905.25" y="311.7856">Retruns</text><text fill="#000000" font-family="monospace" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="208" x="958.25" y="311.7856">URT_STATUS_FETCH_NOMESSAGE</text><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="228" x="1170.25" y="311.7856">if there is no new message to fetch.</text><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="49" x="905.25" y="326.9185">Returns</text><text fill="#000000" font-family="monospace" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="208" x="958.25" y="326.9185">URT_STATUS_JITTERVIOLATION</text><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="403" x="1170.25" y="326.9185">if the message's latency violated the maximum expected jitter.</text><ellipse cx="1243.75" cy="364.9844" fill="#000000" filter="url(#f15mjsst8r4upa)" rx="10" ry="10" style="stroke: none; stroke-width: 1.0;"/><polygon fill="#FEFECE" filter="url(#f15mjsst8r4upa)" points="1181.25,394.9844,1306.25,394.9844,1318.25,406.9844,1306.25,418.9844,1181.25,418.9844,1169.25,406.9844,1181.25,394.9844" style="stroke: #A80036; stroke-width: 1.5;"/><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="125" x="1181.25" y="410.7925">Associated to a topic?</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="20" x="1149.25" y="404.3901">yes</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="14" x="1318.25" y="404.3901">no</text><rect fill="#FEFECE" filter="url(#f15mjsst8r4upa)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="80" x="683.5" y="428.9844"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="60" x="693.5" y="450.123">lock topic</text><rect fill="#FFFFFF" filter="url(#f15mjsst8r4upa)" height="540.7378" style="stroke: #000000; stroke-width: 2.0;" width="1432" x="11" y="472.9531"/><path d="M156,473.9531 L156,482.25 L146,492.25 L11,492.25 " fill="none" style="stroke: #000000; stroke-width: 2.0;"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="135" x="14" y="486.9482">find latest message</text><rect fill="#FEFECE" filter="url(#f15mjsst8r4upa)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="145" x="651" y="509.25"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="44" x="661" y="530.3887">access</text><text fill="#000000" font-family="monospace" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="77" x="709" y="530.3887">lastMessage</text><rect fill="#000000" filter="url(#f15mjsst8r4upa)" height="6" rx="2.5" ry="2.5" style="stroke: #000000; stroke-width: 1.0;" width="1373" x="39" y="618.9292"/><rect fill="#FEFECE" filter="url(#f15mjsst8r4upa)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="181" x="480.5" y="644.9292"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="161" x="490.5" y="666.0679">proceed to next message</text><rect fill="#000000" filter="url(#f15mjsst8r4upa)" height="6" rx="2.5" ry="2.5" style="stroke: #000000; stroke-width: 1.0;" width="1042" x="51" y="707.3823"/><rect fill="#FEFECE" filter="url(#f15mjsst8r4upa)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="329" x="63" y="740.3667"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="309" x="73" y="761.5054">decrement message's counter of HRT consumers</text><rect fill="#EEEEEE" filter="url(#f15mjsst8r4upa)" height="47.9375" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="301" x="420" y="733.3823"/><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 1.0,2.0;" x1="420" x2="454.5" y1="750.3667" y2="750.3667"/><text fill="#000000" font-family="sans-serif" font-size="12" font-style="italic" lengthAdjust="spacingAndGlyphs" textLength="232" x="454.5" y="754.021">URT_CFG_PUBSUB_PROFILING == true</text><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 1.0,2.0;" x1="686.5" x2="721" y1="750.3667" y2="750.3667"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="281" x="430" y="768.4897">decrement message's counter of consumers</text><rect fill="#EEEEEE" filter="url(#f15mjsst8r4upa)" height="47.9375" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="330" x="749" y="733.3823"/><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 1.0,2.0;" x1="749" x2="759" y1="750.3667" y2="750.3667"/><text fill="#000000" font-family="sans-serif" font-size="12" font-style="italic" lengthAdjust="spacingAndGlyphs" textLength="310" x="759" y="754.021">URT_CFG_PUBSUB_QOS_DEADLINECHECKS == true</text><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 1.0,2.0;" x1="1069" x2="1079" y1="750.3667" y2="750.3667"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="156" x="759" y="768.4897">reset QoS deadline timer</text><rect fill="#000000" filter="url(#f15mjsst8r4upa)" height="6" rx="2.5" ry="2.5" style="stroke: #000000; stroke-width: 1.0;" width="1042" x="51" y="801.3198"/><rect fill="#EEEEEE" filter="url(#f15mjsst8r4upa)" height="47.9375" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="277" x="1121" y="698.8979"/><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 1.0,2.0;" x1="1121" x2="1144.5" y1="715.8823" y2="715.8823"/><text fill="#000000" font-family="sans-serif" font-size="12" font-style="italic" lengthAdjust="spacingAndGlyphs" textLength="230" x="1144.5" y="719.5366">URT_CFG:PUBSUB_PROFILING == true</text><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 1.0,2.0;" x1="1374.5" x2="1398" y1="715.8823" y2="715.8823"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="257" x="1131" y="734.0054">increment counter of received messages</text><rect fill="#000000" filter="url(#f15mjsst8r4upa)" height="6" rx="2.5" ry="2.5" style="stroke: #000000; stroke-width: 1.0;" width="1373" x="39" y="827.3198"/><rect fill="#FEFECE" filter="url(#f15mjsst8r4upa)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="217" x="615" y="901.7222"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="197" x="625" y="922.8608">signal topic's condition variable</text><polygon fill="#FEFECE" filter="url(#f15mjsst8r4upa)" points="614.5,853.3198,832.5,853.3198,844.5,865.3198,832.5,877.3198,614.5,877.3198,602.5,865.3198,614.5,853.3198" style="stroke: #A80036; stroke-width: 1.5;"/><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="20" x="727.5" y="887.5303">yes</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="218" x="614.5" y="869.1279">HRT counter of a message became 0?</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="14" x="844.5" y="862.7256">no</text><polygon fill="#FEFECE" filter="url(#f15mjsst8r4upa)" points="723.5,955.6909,735.5,967.6909,723.5,979.6909,711.5,967.6909,723.5,955.6909" style="stroke: #A80036; stroke-width: 1.5;"/><polygon fill="#FEFECE" filter="url(#f15mjsst8r4upa)" points="606.5,563.2188,840.5,563.2188,852.5,575.2188,840.5,587.2188,606.5,587.2188,594.5,575.2188,606.5,563.2188" style="stroke: #A80036; stroke-width: 1.5;"/><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="20" x="727.5" y="597.4292">yes</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="234" x="606.5" y="579.0269">Timestamp of next message is younger?</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="14" x="580.5" y="572.6245">no</text><polygon fill="#FEFECE" filter="url(#f15mjsst8r4upa)" points="637.5,1033.6909,809.5,1033.6909,821.5,1045.6909,809.5,1057.6909,637.5,1057.6909,625.5,1045.6909,637.5,1033.6909" style="stroke: #A80036; stroke-width: 1.5;"/><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="172" x="637.5" y="1049.499">Timestamp equals local copy?</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="20" x="605.5" y="1043.0967">yes</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="14" x="821.5" y="1043.0967">no</text><rect fill="#FEFECE" filter="url(#f15mjsst8r4upa)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; 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|---|---|---|---|
| 2 | dd31cb03 | Thomas Schöpping | @startuml |
| 3 | |||
| 4 | title **µRtWare**\nurtHrtSubscriberFetchLatestMessage()\n |
||
| 5 | |||
| 6 | e7056e1b | skenneweg | !include ../functions.iuml |
| 7 | |||
| 8 | /'### PARAMETERS & RETURN ####################################################'/ |
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| 9 | |||
| 10 | note |
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| 11 | - - **subscriber** : urt_hrtsubscriber_t* - - |
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| 12 | The HRT subscriber that shall fetch the message. |
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| 13 | Must not be ""NULL"". |
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| 14 | - - **payload** : void* - - |
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| 15 | Pointer where to copy the payload to. |
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| 16 | May be ""NULL"" for messages without payload. |
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| 17 | - - **bytes** : size_t - - |
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| 18 | Payload size in bytes. |
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| 19 | - - **latency** : urt_delay_t* - - |
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| 20 | The latency can be returned by reference. |
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| 21 | May be ""NULL"". |
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| 22 | ==== |
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| 23 | - - **return** : urt_status_t - - |
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| 24 | Returns ""URT_STATUS_OK"" on success. |
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| 25 | Returns ""URT_STATUS_FETCH_NOTOPIC"" if the subscriber is not associated to a topic. |
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| 26 | Retruns ""URT_STATUS_FETCH_NOMESSAGE"" if there is no new message to fetch. |
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| 27 | Returns ""URT_STATUS_JITTERVIOLATION"" if the message's latency violated the maximum expected jitter. |
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| 28 | endnote |
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| 29 | |||
| 30 | /'### PROCEDURE ##############################################################'/ |
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| 31 | |||
| 32 | start |
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| 33 | if (Associated to a topic?) then (yes) |
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| 34 | :lock topic; |
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| 35 | partition "find latest message" {
|
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| 36 | :access ""lastMessage""; |
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| 37 | while (Timestamp of next message is younger?) is (yes) |
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| 38 | fork |
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| 39 | :proceed to next message; |
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| 40 | fork |
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| 41 | :decrement message's counter of HRT consumers; |
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| 42 | fork again |
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| 43 | #EEEEEE:..//URT_CFG_PUBSUB_PROFILING == true//..\ndecrement message's counter of consumers; |
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| 44 | fork again |
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| 45 | #EEEEEE:..//URT_CFG_PUBSUB_QOS_DEADLINECHECKS == true//..\nreset QoS deadline timer; |
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| 46 | endfork |
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| 47 | fork again |
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| 48 | #EEEEEE:..//URT_CFG:PUBSUB_PROFILING == true//..\nincrement counter of received messages; |
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| 49 | endfork |
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| 50 | if (HRT counter of a message became 0?) then (yes) |
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| 51 | :signal topic's condition variable; |
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| 52 | else (no) |
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| 53 | endif |
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| 54 | endwhile (no) |
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| 55 | } |
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| 56 | if (Timestamp equals local copy?) then (yes) |
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| 57 | :unlock topic; |
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| 58 | stop |
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| 59 | note |
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| 60 | Returns ""URT_STATUS_FETCH_NOMESSAGE"". |
||
| 61 | endnote |
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| 62 | else (no) |
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| 63 | :calculate message latency; |
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| 64 | fork |
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| 65 | #EEEEEE:..//URT:CFG_PUBSUB_PROFILING == true//..\naccumulate ""sumLatencies"" value; |
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| 66 | fork again |
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| 67 | if (Optional ""latency"" output argument given?) then (yes) |
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| 68 | :set ""latency"" value; |
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| 69 | else (no) |
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| 70 | endif |
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| 71 | endfork |
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| 72 | endif |
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| 73 | partition "//URT_CFG_PUBSUB_QOS_JITTERCHECKS == true || URT_CFG_PUBSUB_PROFILING == true//" #EEEEEE {
|
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| 74 | if (Latency is within allowed jitter range?) then (yes) |
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| 75 | if (Latency is lower than ""minlatency""?) then (yes) |
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| 76 | #EEEEEE:update ""minLatency"" value; |
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| 77 | elseif (Latency is greater than ""maxLatency"" value?) then (yes) |
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| 78 | #EEEEEE:update ""maxLatency"" value; |
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| 79 | else (no) |
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| 80 | endif |
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| 81 | else (no) |
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| 82 | partition "//URT_CFG_PUBSUB_QOS_JITTERCHECKS == true//" #EEEEEE {
|
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| 83 | #EEEEEE:unlock topic; |
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| 84 | #EEEEEE:call ""urtCoreStopNodes(URT_STATUS_JITTERVIOLATION)""; |
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| 85 | stop |
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| 86 | note |
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| 87 | Returns ""URT_STATUS_JITTERVIOLATION"". |
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| 88 | endnote |
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| 89 | } |
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| 90 | endif |
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| 91 | } |
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| 92 | fork |
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| 93 | $fetch_message() |
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| 94 | fork again |
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| 95 | #EEEEEE:..//URT_CFG_PUBSUB_QOS_DEADLINECHECKS == true//..\nreset QoS deadline timer; |
||
| 96 | endfork |
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| 97 | :unlock topic; |
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| 98 | stop |
||
| 99 | note |
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| 100 | Returns ""URT_STATUS_OK"". |
||
| 101 | endnote |
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| 102 | else (no) |
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| 103 | stop |
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| 104 | note |
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| 105 | Returns ""URT_STATUS_FETCH_NOTOPIC"". |
||
| 106 | endnote |
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| 107 | endif |
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| 108 | |||
| 109 | /'### OUTRO ##################################################################'/ |
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| 110 | |||
| 111 | @enduml |
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| 112 | |||
| 113 | @startuml |
||
| 114 | |||
| 115 | title **µRtWare**\nurtHrtSubscriberFetchLatestMessage()\n |
||
| 116 | dd31cb03 | Thomas Schöpping | |
| 117 | |||
| 118 | |||
| 119 | |||
| 120 | |||
| 121 | |||
| 122 | note |
||
| 123 | - - **subscriber** : urt_hrtsubscriber_t* - - |
||
| 124 | The HRT subscriber that shall fetch the message. |
||
| 125 | Must not be ""NULL"". |
||
| 126 | - - **payload** : void* - - |
||
| 127 | Pointer where to copy the payload to. |
||
| 128 | May be ""NULL"" for messages without payload. |
||
| 129 | - - **bytes** : size_t - - |
||
| 130 | Payload size in bytes. |
||
| 131 | - - **latency** : urt_delay_t* - - |
||
| 132 | The latency can be returned by reference. |
||
| 133 | May be ""NULL"". |
||
| 134 | ==== |
||
| 135 | - - **return** : urt_status_t - - |
||
| 136 | Returns ""URT_STATUS_OK"" on success. |
||
| 137 | Returns ""URT_STATUS_FETCH_NOTOPIC"" if the subscriber is not associated to a topic. |
||
| 138 | Retruns ""URT_STATUS_FETCH_NOMESSAGE"" if there is no new message to fetch. |
||
| 139 | Returns ""URT_STATUS_JITTERVIOLATION"" if the message's latency violated the maximum expected jitter. |
||
| 140 | endnote |
||
| 141 | |||
| 142 | |||
| 143 | start |
||
| 144 | if (Associated to a topic?) then (yes) |
||
| 145 | :lock topic; |
||
| 146 | partition "find latest message" {
|
||
| 147 | :access ""lastMessage""; |
||
| 148 | while (Timestamp of next message is younger?) is (yes) |
||
| 149 | fork |
||
| 150 | :proceed to next message; |
||
| 151 | fork |
||
| 152 | :decrement message's counter of HRT consumers; |
||
| 153 | fork again |
||
| 154 | #EEEEEE:..//URT_CFG_PUBSUB_PROFILING == true//..\ndecrement message's counter of consumers; |
||
| 155 | fork again |
||
| 156 | #EEEEEE:..//URT_CFG_PUBSUB_QOS_DEADLINECHECKS == true//..\nreset QoS deadline timer; |
||
| 157 | endfork |
||
| 158 | fork again |
||
| 159 | #EEEEEE:..//URT_CFG:PUBSUB_PROFILING == true//..\nincrement counter of received messages; |
||
| 160 | endfork |
||
| 161 | if (HRT counter of a message became 0?) then (yes) |
||
| 162 | :signal topic's condition variable; |
||
| 163 | else (no) |
||
| 164 | endif |
||
| 165 | endwhile (no) |
||
| 166 | } |
||
| 167 | if (Timestamp equals local copy?) then (yes) |
||
| 168 | :unlock topic; |
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| 169 | stop |
||
| 170 | note |
||
| 171 | Returns ""URT_STATUS_FETCH_NOMESSAGE"". |
||
| 172 | endnote |
||
| 173 | else (no) |
||
| 174 | :calculate message latency; |
||
| 175 | fork |
||
| 176 | #EEEEEE:..//URT:CFG_PUBSUB_PROFILING == true//..\naccumulate ""sumLatencies"" value; |
||
| 177 | fork again |
||
| 178 | if (Optional ""latency"" output argument given?) then (yes) |
||
| 179 | :set ""latency"" value; |
||
| 180 | else (no) |
||
| 181 | endif |
||
| 182 | endfork |
||
| 183 | endif |
||
| 184 | partition "//URT_CFG_PUBSUB_QOS_JITTERCHECKS == true || URT_CFG_PUBSUB_PROFILING == true//" #EEEEEE {
|
||
| 185 | if (Latency is within allowed jitter range?) then (yes) |
||
| 186 | if (Latency is lower than ""minlatency""?) then (yes) |
||
| 187 | #EEEEEE:update ""minLatency"" value; |
||
| 188 | elseif (Latency is greater than ""maxLatency"" value?) then (yes) |
||
| 189 | #EEEEEE:update ""maxLatency"" value; |
||
| 190 | else (no) |
||
| 191 | endif |
||
| 192 | else (no) |
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| 193 | partition "//URT_CFG_PUBSUB_QOS_JITTERCHECKS == true//" #EEEEEE {
|
||
| 194 | #EEEEEE:unlock topic; |
||
| 195 | #EEEEEE:call ""urtCoreStopNodes(URT_STATUS_JITTERVIOLATION)""; |
||
| 196 | stop |
||
| 197 | note |
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| 198 | Returns ""URT_STATUS_JITTERVIOLATION"". |
||
| 199 | endnote |
||
| 200 | } |
||
| 201 | endif |
||
| 202 | } |
||
| 203 | fork |
||
| 204 | partition "fetch message" {
|
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| 205 | fork |
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| 206 | :update message pointer; |
||
| 207 | fork again |
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| 208 | :copy message origin time; |
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| 209 | fork again |
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| 210 | :copy message payload; |
||
| 211 | endfork |
||
| 212 | } |
||
| 213 | fork again |
||
| 214 | #EEEEEE:..//URT_CFG_PUBSUB_QOS_DEADLINECHECKS == true//..\nreset QoS deadline timer; |
||
| 215 | endfork |
||
| 216 | :unlock topic; |
||
| 217 | stop |
||
| 218 | note |
||
| 219 | Returns ""URT_STATUS_OK"". |
||
| 220 | endnote |
||
| 221 | else (no) |
||
| 222 | stop |
||
| 223 | note |
||
| 224 | e7056e1b | skenneweg | Returns ""URT_STATUS_FETCH_NOTOPIC"". |
| 225 | dd31cb03 | Thomas Schöpping | endnote |
| 226 | endif |
||
| 227 | |||
| 228 | |||
| 229 | @enduml |
||
| 230 | |||
| 231 | e7056e1b | skenneweg | PlantUML version 1.2020.15(Sun Jun 28 13:39:45 CEST 2020) |
| 232 | dd31cb03 | Thomas Schöpping | (GPL source distribution) |
| 233 | Java Runtime: OpenJDK Runtime Environment |
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| 234 | JVM: OpenJDK 64-Bit Server VM |
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| 235 | Default Encoding: UTF-8 |
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| 236 | e7056e1b | skenneweg | Language: de |
| 237 | Country: DE |
||
| 238 | dd31cb03 | Thomas Schöpping | --></g></svg> |