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<p>Note that the unique number that each region is identified with is system-specific and can change each time the code is


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<div class="ChapSects"><a href="chap3.html#X8076353A830B11B6">3 <span class="Heading">How HPC-GAP organizes shared memory: Regions</span></a>
<divclass="ContSect>><span class="tocline"><span class="nocss"> </span><a href="chap3.html#X7B697BA17A813E7D">3.2 <
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<div class="ContSect"><span class="tocline"><span class="nocss"> </span><a href="chap3.html#X827637EE7A69AFCD">3.8 <span class="Heading">Controlling access to regions</span></a>
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<span class="ContSS"><br /><span class="nocss">  </span><a href="chap3.html#X867DE843791EEF65">3.9-11 ShareSystemObj</a></span>
<span class="ContSS"><br/span
< class"ContSS>br />  3.9-13 ShareInternalObj

<span="ContSS"><br>span=/java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7
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<span class="ContSS"><br /><span class="nocss">  </span><a href="chap3.html#X8352EF8B83390656">3.9-17 ShareSingleSystemObj</a></span>
<spanclass"ContSS>
>3.9-18 ShareSingleKernelObj</a></span>
<<spanclass="ContSS"><br /><span="nocss">  /span><a hrefchap3htmlX87421870782B33C73.-8 RegionPrecedencea</span
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<span class= class""><br><span classnocss&; /span> ="chap3.htmlX83864D427DE991F2>3- /a>
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<span class="ContSS"><br /><span class="nocss">  </span><a href="chap3.html#X7D1943AF793296F7">3.9-24 IncorporateObj</a></span>
<span class="ContSS"><br /><span span class="ContSS"><br /><span class; /span>ahref".html#">3.- NewKernelRegiona></>
<class> < ""& s>a "chap3.html#784978D801191E2780111E2"392 AdoptObj>/span
<span class="ContSS"><br /><span class="nocss"span classContSS< /<span classnocss&; </><a hrefchap3X7A7FFA847E090257">.-6 NewSpecialRegion
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<span class="ContSS"><br /><span class="nocss">  </span><a span=ContSSbr>span="">&;;span href.html">.-8
<span class="ContSS"><br /><span class="nocssspan class="ContSS< >span""&;&;/>ahref.htmlX8508A72B7C215FA591ShareSingleObj/>
< classContSS><br /><span class="nocss"> nbsp/span>a  href=chap3.htmlX86B2EEF67C3378F0>9311 IsThreadLocal/a>/span
< classContSS /< class"&;&bsp;/><"chap3html"39-2 IsShared

<spanclass="ContSS"><br /><span class="nocss">  </span><a href="chap3.html#X827A26A67C99316C">3.9-33 HaveReadAccess</a></span>
<"3.-344 class"ContSS<r >spanclassn>;&;/spanhref.html"">3.-17</a/span>
<span class="ContSS"><br /><span class="nocss">  </span><a href="chap3.html#X7F53D70285AF37B4">3.9-35 MakeReadOnlyObj</a></span>
.#7"39-6MakeReadOnlySingleObj<>
<span class="ContSS"><br /><span class="nocss">  </span><a href="chap3.html#X860008F57EFE21C4">3.9-37 IsReadOnlyObj =ContSS< ><span classnocss>; </pan><hrefchap3.htmlX82F3B2597E0EC15E39-14 <a<span
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spanContSS > class"&;nbsp/span>
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< classContSS< /> classnocss>;&;<span< ="chap3.#X7FD39BCC8526AC53"3942UNSAFE_VIEW/><span
<span class=ContSS<br ><spanclass="nocss">  /span<ahref.#X7FD1B1B785E24734394 <spanclass="Heading">The <code class="code">atomic</code> statement.</span></a>
/>
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<span class="ContSS"><br /><span class="nocss"span="ContSS"><br />< class"nocss"> &;</spana ="chap3.html#229265">3.93 </a></>
span class"ContSS">br ><span =nocss>  /spana="html#X81B15A9C8795DF59">3.1-4<><//pan
<span class="ContSS"><br /><span class="nocss"> < class="ontSS"< >span="  ahref"
hap3X7EC9341A865BCC35393 MakeReadOnlySingleObj>/>
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</div>

<h3>3 <span class="Heading">How HPC-GAP organizes shared class""</span"nbsp&bsp;X7F1E2F707F72371E.8 SetRegionName>/>

pHPC-GAP  multiplethreads accessdata between them to  common concurrency, such race conditionsit partitionsGAPobjects regions.Access classContSSbr /< class""> &;</><a href".html#">.93 </<span

<p><a id="X7E2199568017C74F" name="X7E2199568017C74F"></a></p>

<h4>3<spanclass"ContSS"><r /<span="nocss">  </pan><href.X80D0DFAB7F7241E8<classContSSbr/>span"">&;&;<span hrefchap3X>.9 <<//>

<span="ContSS"< >span"nocss>nbsp; /< href="chap3.htmlX7FD39BCC8526AC5392<span class="ContSS"><br /><span class="nocss">  </span><a href="chap3.html#X7FD39BCC8526AC53">3.9-42 UNSAFE_VIEW

<p>Only the thread can read or modify objects in its thread-local region. For other threads to access an object, that object has to be migrated into a different region first.</p>

<p><a id="X7B697BA17A813E7D" name="X7B697BA17A813E7D"></a></p>

<h4>3.2 <span classContSS<r /<span="nocss""  chap3X7959FC997CC9177C.-40RegionName/>/>

<p>Shared regions are explicitly created throughspan classContSS class"ContSect">class"tocline"><spanclass=nocss&;/spanahrefchap3htmlX78883D5E83B4425F31span="Heading"> functionality/></a>

<p>See the section on <code class="code">atomic</code> statements (<a href="chap3.html#X7FD1B1B785E24734"><span < class"ContSSBlock"java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
span=ContSSbr><spanclassnocss& </spana hrefchap3html>.12TestBindOnce/a></span>
p>a ="X83627591876D3FF3" nameX83627591876D3FF3>/</pjava.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62

<h4>

<p> regions are defaultorderedeachshared hasan<pan".html#X7897092C86AE17D7"31-5StrictBindOnce/a>/pan

<p>The ordering

<p>Alternatively, two ormore can be simultaneously via <codeclasscode>tomic</code</code> statement.In case, the of these relativeto</span

<p><a id="X8239FDC583A4E39D" name="X8239FDC583A4E39D">

<h434classHeadingThe region<span/h4

<p>A special public region contains objects class=""><br>< class"nocssjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

< threadsaccess  public at all without needingacquirea read-or write-lockbeforehand</java.lang.StringIndexOutOfBoundsException: Index 132 out of bounds for length 132

<p>

<h4>3.

<p>The read-only h33 span="Heading"HowHPC-GAP  memory:Regions/span></h3>

<p>

<h436  <span ="Heading"Migratingobjectsbetweenregionsspan<java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

<p>Objects can bep>java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

<p>The<p>a id"X83627591876D3FF3" name="X83627591876D3FF3"></a></p>

<p>The

<p>The

<p>inallycodeclass"">AdoptObj/code> (a java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

<p>To 

<>java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

<p>The exception are java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0


< ordering can overridden twoways regions aprecedenceare from.This should used care as canleadto.<>
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region
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<p><a ="

<pAll threads  accessobjects

<p>Regions can be given names, either

<p>Multiple regions>aidX7E0116957AFB982D

<h4< 

<h4

<p>If either h46 <span

<h4

<p>To inspect assjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

<p><a id="X7BE832987B1DC975" name="X7BE832987B1DC975"></a></p>

<h4>3.9 <span class="Heading">Functions relating to regionsp>Finally codeclass"">AdoptObjcode>(ah=

<p><

<h5>3.9-1 NewRegion</h5>

<div class="func"><table class
<p> function classfuncNewRegion/>createsnewregion Iftheoptional var"Arg


divclass
<span class"">gap&java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
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<java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

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<< classfunc">/>functions

7FB0BE4C78CA85DAMcanname
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<h5

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">3.9-1), except that the precedence of the regionit createsis below that of ">NewLibraryRegion (chap3.htmlX83864D427DE991F2< =RefLink.-2<spana) It intendedbe bythestandardlibrary/>

<p><a id="X825A881A7A39C5C3" name="X825A881A7A39C5C3"></a></p>

<h5java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

<div<
<p><code class="func">NewKernelRegion</code> functions />/p

<>< idjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

<h5>3.9-5 NewInternalRegion/h5

<div class="func"><table
<p><code classdivclassexample>pre

<p&;regionpThe< class"><>creates a new . If the argument =A>ame is provided, the of thenew will set < class=""/.>

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h5/java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

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<public regionh5.>.- NewSystemRegionh5java.lang.StringIndexOutOfBoundsException: Range [30, 31) out of bounds for length 30
span=GAPpromptgap&;<> spanclass"GAPinput"RegionOf[,2)<>
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code class=func">NewSystemRegion<code> functions like< classfuncNewRegion</code < href="chap3.tml#X851C5F3C82F6F5AE"><span class"39-1>), except that the precedence ofthe region it creates is below that of funcjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
;0>
<span class="GAPprompt">gap></span> <<p><code class="func">NewKernelRegion</code> <code class="func>ewRegion/code
< 0x45deaa0
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</pre =""< class"" width"1%>

" width=< class>827=dleft">code =func">##827<code(var=Argobjvarvar class"Arg>>] )td =tdright" functionnbsp<tdtrtable/>java.lang.StringIndexOutOfBoundsException: Index 255 out of bounds for length 255
<>codeclass"func>/code functions like< =func> (a href="hap3#X7D5982617A3027BD< =RefLink399/>/a>     ofregion .It exempt  andchecks/>

<p><a id="X8508A72B7C215FA5" name="X8508A72B7C215FA5"></a></p>

<h5>3.9-15 ShareSingleObj</h5>

<div class="func"><table <p>a idX867DE843791EEF65 name
<pThecode classfunc</code>function a new region 


<div p<p>code lassfuncShareSystemObjcode functionslike="func> (ahref"chap3html">.-9span>
, except that the precedence the ="">/a
<span class=div ="">tablejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
<panclass"GAPprompt"apgt</span <spanclass=""">ShareSingleObj(m);;;<
<span class="GAPprompt
3.9-12 ShareKernelObj

<span class="GAPprompt">></span> <span h="100"><tr><td classtdleft< class"unc">#8227 ShareKernelObj/ode <var="Arg">objvar>[[,< class"rg"namevar, <var
<span class="GAPprompt">></span> <span class"
[ruefalse ]
</pre></div>

<p><code class="func">ShareSingleObj</code> will create

<p><a id="X87A1962578CDA61D" name="X87A1962578CDA61D"></a<div classfuncp>< =X82F3B2597E0EC15Ename"">/a>p>

<h5>3.9-16 ShareSingleLibraryObjdivclassfunc class=func="100%"><tr><td class="tdleft">code">̻ShareSpecialObj(Argobjvar var=Argnamevar )tdtd=tdright&;function&;)</td/></table</iv

<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ ShareSingleLibraryObj</code>( <var class="Arg">obj</var>[[, <var class="Arg">name<
<808A72B7C215FA5< =RefLink>3.-5<spana) except thattheprecedence the itcreates belowof =func>hareSingleObjcode (a href"chap3.#X8508A72B7C215FA58"08">RefLink>.915</span/) Its   bebyser libraries  GAP./>

<p><a id="X8352EF8B83390656" name="X8352EF8B83390656"></a></p>

<h5>3.9-17 ShareSingleSystemObj</h5>

< ="func> =" ="0%>
<>code class=">ShareSingleSystemObj functionsfunctions like"ShareSingleObj/code ((a href=chap3.#X8508A72B7C215FA5">spanclassRefLink391<span</>,exceptthat precedenceofjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

<p><a id="X7B5A471982EFD292" name="apgtGAPinput">ShareSingleObjm);;/>

<h5>3.9-18 ShareSingleKernelObj</h5>

<div class="func"><table class="func" width="100%"><tr><td class([ IsShared[ true,, false
<p><code<p><code , false

<p><a id="X85C5F5A67DAFD919" name="X85C5F5A67DAFD919"></a></p>

<h5>3.9-19 ShareSingleInternalObj</h5

<
<p><code =">ShareSingleInternalObj<>functionslike =func"ShareSingleObj/><href.html"< class="RefLink.95s>/),java.lang.StringIndexOutOfBoundsException: Range [267, 191) out of bounds for length 418

<p><a id="X7CB671AE7A411314" name="X7CB671AE7A411314"></a

<><div="func"><table class="func" width"0%>tr>=""&82; /> < =A">v="name/>>, varArg>/> )< =">nbsp;<dtrtable/div

<div class="func"><table class="func" width="100%"><<p><code class"func"ShareSingleLibraryObj<c>
<p><code class="func">ShareSingleLibraryObj</code> (<a hrefh5>

 lassfunc< =="0>>td""<=#2 /> =>>var class=Arg"><>] <var">prec;function;)/><><//able/iv

<h5>3.9-21 MigrateObj</h5>

< classfunc">
‣ MigrateObj( obj, target )( function )

<p>The <code class

<p>For the operation to succeed, the<p><a id"X7B5A471982EFD292<>.9-1 ShareSingleKernelObj

<p><a id="divclass"">/table
<p>The <code class;

<p<a id="X7C71A88487762733"nameX7C71A88487762733<a>/p>

<h5>3.9-29 CopyRegion</h5>

<divclassfunc><table class""0>td> =">#8227 CopyRegion<<>( var ="rg>/var> )<td<tdclass="tdright">(nbspfunctionnbsp)</td/r>/table>/div
<> func</code>functiona copyar=Arg<.  be inthread.functionthe  >


<>.2 </h5
<span class="GAPprompt">gap></span>java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
[ 1, 2, 3 ]
<span class="
o
<span class ="GAPprompt">gap>/pre<divjava.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
false
<span class
false
< class>
true
</pre></div>

<p><a id="X8222929685E9959A" name="X8222929685E9959A"></a></p>

<h5>3.9-30 IsPublic</h5>

<div class="func"><table class="GAPprompt"gapgt/span <
<p>The <code class="pt"> class< class"width=10/ ></> )</td class">&;function )
spanclass"efLink391<spana),except thattheprecedenceof regionitcreates belowthatof< class"">ShareSingleSystemObj/>(< href"chap3.html#X8352EF8B83390656"< classRefLink31<></>) It intended tobeused  k, GAPibrarythatcloselyiththekernel/p

<h5>3.9-22 MigrateSingleObj</h5>

<p>a id"name=X85C5F5A67DAFD919"<a>p>
<p>The <code class

<p><a id="X7E4B54BF837E81C0" name="java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 0

<h5>3.9-23 LockAndMigrateObj</h5>

<div class="func
<The classLockAndMigrateObj<>  works code="uncMigrateObj/code (< href="chap3.html#X81A356DD84E76A8A">3.9-21), except that it will automatically try to acquire a lock for the region containing target if it does not have one already.



<p><a  classfunctable class=10%>tr<td="#27;( <">obj/var>[< class=">namejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

<h5>3.9-24 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

<div class=java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
<p>The <code class


<div class="
3.9-21MigrateObj/h5>
IncorporateObj := function(target, index, value)
  atomic value do
    target[index] := MigrateObj(value, target)
  od;
end
</pre></div>

<p>If <var


<div class="example"><pre>
IncorporateObj := function(target, index, value
  divclass""<table =uncwidth10%<r>tdclass"tdleft< ="func&82;MigrateSingleObj/code(  class"Arg"><var>,varlass"Arg>target/var )
tdright"(&;functionnbsp)/>/table
    target.(index) := MigrateObjp<a id =""><a>/p>
  od;
endjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
</></div

<p>The intended purpose is the population of a shared list or record with values after its creation. Example:</p>


<div class="example"><pre>
<span class="GAPprompt">gap></span>java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
<span class"GAPprompt">&;</><span="GAPinput> list do/span>
<span class="GAPprompt">></span> <span classjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
<span classGAPprompt">&; <GAPinputIncorporateObj,2,[,6span
<span class
<panclass"

X7D1943AF793296F7>>
<span class="GAPprompt">gap></span> <span class="GAPinput">ViewShared(list);</span>
 [ 11 ,  ],[ 4 5,  66], [, 8  ] java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
<<

>  assignment leave thecreated  thread-local.<>

<p><a id="X876843717F4437CB" name="X876843717F4437CB"></a></p>

<h5>3.9-25 AtomicIncorporateObj</h5>

< class"func"><table class="func
<>< ""AtomicIncorporateObjcode> <<ode="func"IncorporateObjcode < =".html#D1943AF793296F7>span "">/pan> lockingthe . Ie alist it is :


<divatomic do
AtomicIncorporateObjindex
  atomic target,<iv="example">;
    index] MigrateObj(value, target
  od;
end;
</pre></div>

<p>If></>


<div class="example">   value
AtomicIncorporateObjfunction, java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
  
    target.(index)odjava.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
  od;
end
</span="GAPprompt">gt;</pan> <span class="GAPinput">    <span class="GAPprompt">></span> <span class="GAPinput">     IncorporateObjcreation :<pjava.lang.StringIndexOutOfBoundsException: Index 113 out of bounds for length 113

< class"gapgt >atomic list do</span>

<h5>39-26 AdoptObjh5

<divclassfunc< classfuncwidth"100">trtdclass"">< classfunc&8277;AdoptObj/code>( <var class"">obj<td<td class"">(nbsp )/td<tr</table></div>
<phe<codeclassfunc><code  migratesvar="Argobj/(and allits subobjects contained withinthe tothethreadscurrentregion.It requiresexclusive accessto var class"">


<div class="example"><pre>
< class"GAPpromptGAPprompt">>/> spanclass"GAPinput">: ShareObj[,2,3<p><a id="X876843717F4437CB" name=X876843717F4437CB</a><p>
<class"&; < class="APinputjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
false
<span ="GAPprompt">>/span> <span="GAPinput">atomicdo(l); odspan
< class=GAPprompt>&;/><span=GAPinputl;/pan
true
</pre></div>

<>aidX834DDB388600E9FAname[[ 1 2, ] [ 44, 6 ], ,8 9 ] ]

<AtomicIncorporateObj := functiontargetindexvalue

< classjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
<>The <code class="func">AdoptSingleObj</code> function works like <code class="func">AdoptObj</code> (<>code ="">AtomicIncorporateObj/codejava.lang.StringIndexOutOfBoundsException: Range [57, 51) out of bounds for length 250

<p><a< classexample<pre

<h539-8 LockAndAdoptObj</h5>

<div class"func>table class="func" width="100%><trtd classtdleft>codeclass">‣ LockAndAdoptObj class="Argobj/var> )</td class">( function&;)




<div classspanomptgapgt<< Gljava.lang.StringIndexOutOfBoundsException: Index 86 out of bounds for length 86
<span class="GAPprompt">gap
true
=>gtjava.lang.StringIndexOutOfBoundsException: Range [4, 3) out of bounds for length 30
false
<span class"" name>
false>.2CopyRegion>
<span class="GAPprompt">gap>
rue
</pre></div>

<p><a id="X86B2EEF67C3378F0" name

<h5>3.9-31 IsThreadLocal

<
<pTheclass="func">IsThreadLocalcode  returnstrue if argument is object the threadsthread-localregion .pjava.lang.StringIndexOutOfBoundsException: Range [163, 164) out of bounds for length 163


<divclass="example><>
<span="GAPprompt"gap;</> <span class="APinput>
true
<span java.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 0

<spanp>he java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
false
<span class="GAPprompt">gap></span> <span class="GAPinput">RegionOf
&; region;
<java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4

<p< id



[1 2, java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
<< =func>  its  in region that current does a lock thatshared region another can <var="Arg">objvarto a different region the result isbeing evaluated  can lead race conditions The is intended for debugging,  to build actualprogram logic.</p>

<p><a id="X827A26A67C99316C" name="X827A26A67C99316C"></a></p>

<h5>3.9-33 HaveReadAccess</h5>

<div class="func"><table class="func" width="100%"><tr><td class/pre><//>
<p>The <code class="func">HaveReadAccess</code> function returns true if the current<pThe <odeclass"unc">sPubliccode


<div class="example"><pre>
<span class="GAPprompt">gap>
true
span="GAPprompt">gap;</span><span class"GAPinput"l: [1
<span<code ="func>sPublic true is an objectspanclass"GAPpromptgtspanpanGAPinputsPublic(12])span
false
<span="gap;</> <spanclass"IsPublicMakeImmutable[,,])
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
/>

p>9<>

<h5>3.9-34 HaveWriteAccess</h5>

<div class=
<p>The <code class=<div class=example<pre


<div class="example"><pre>

true =""<span="GAPprompt"">gapgt>gap></<div=example"><
false
<spanlt true
true
</rejava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0

<p><a id="X7F53D70285AF37B4" name="X7F53D70285AF37B4"class">gapjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

<h5-5</h5

<div class="func"><table class=p>< ="X80A11F3C84DB512E" name""<a>p>
<p>The <code class="func">MakeReadOnlyObj</code> function

<p><a id="X7EC9341A865BCC35" name="X7EC9341A865BCC35"></a></p>

<h5>3.9-36 MakeReadOnlySingleObj class"">< =" width=1%>< class=""/(< class"rg )< ""(nbsp/>t>t>/>

<div class="func"><table class="func" width="100%"><tr><td class="
<p>The

<p><a id="X860008F57EFE21C4" name="X860008F57EFE21C4">java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

<h5>3.9-37 IsReadOnlyObj</h5>

eclass"idth0"<tr< =""<class"">#22 IsReadOnlyObjcode<varArg//td "tdright>(nbspfunctionnbsp)t>table/div>
<p>The


< class"

< class"gapgt">IsReadOnlyObj(([1,2,];/>
false
<span =GAPprompt&;spanspan": [,]
false
<span class="GAPprompt">gap></span> <span class="GAPinputtrue
true
</pre></div>

<p><a id="X7F1E2F707F72371E" <p< id name"a

<h5

<div class="func"><table classdiv class=func<tableclass="" width10"<>#27 />(< ="">obj )td class="tdright&;nbsp/<tr>div
.pjava.lang.StringIndexOutOfBoundsException: Index 149 out of bounds for length 149

< ="">>> span">java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

h5-/java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31

<class
<>he ="">ClearRegionNamecode  clears name the of<classgap;<<span"HaveWriteAccess();/>

<p><a id<pre>

<>.4RegionName>

<ivclassfunctable>td ="tdleft">codeclass">#27;RegionName/code>( >(  )t>/></table/>
<p>The <code class="func">RegionName</code> function

p<="X80D0DFAB7F7241E8"name>/>/>

<h5-1ViewShared>

<div>3.9-36 MakeReadOnlySingleObj</h5
<p>The <code class="funcclass=func" width10"<><"tdleft>class">&822;MakeReadOnlySingleObj
( < class="Arg><>td"(nbsp;function&;)td>/>

<p><a id="X7FD39BCC8526AC53" name="X7FD39BCC8526AC53">java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

<h5>3.9-42 UNSAFE_VIEW</h5>

<div class="func"><table class="func" width="100%"><tr><td class="tdleft"><code class="func">‣ UNSAFE_VIEW</code>( <var class="Arg">obj</var<>The<</code function < class" ifArg>obj</var>   thejava.lang.StringIndexOutOfBoundsException: Range [152, 151) out of bounds for length 199
<p>The <code class="func">UNSAFE_VIEW</code> function allows the inspection of

<p>Moreover, the function works by temporarily disabling read and write guards for span="">gap;</spanspanclass>(MakeReadOnlyObj,,])<span

<p>It is><aid ="X7F1E2F707F72371E"></a>pjava.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62

<p><a id="X7FD1B1B785E24734" name="X7FD1B1B785E24734"></a></p>

<h5>3.9-43 <span class="Heading">The <code class="code">atomic</code> statement.</span></h5>

<p>The <code class="code">atomic</code> statement ensures exclusive or read-only access to one or more shared regions for java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0


<div class="example"><pre>
atomic ([readwrite|readonly] expr (, expr)* )* do
  statements
od;
</pre></div>

<p>Each expression is< ="" ="">ap


classpre
<span class="GAPprompt">gap></span> <span class="GAPinput">l := ShareObjp> <code="func>RegionName<">/> If   havename < classkeywfail.p
<span ="GAPprompt">><span<span class"APinput>atomic readwrite l do l[3] := 9; od;

<span class="GAPprompt">gap></span> <span class="GAPinput">atomic l do l[2] := 4; od;</span>
<span class="GAPprompt">gap></span> <span class="GAPinput">atomic readonlyl doDisplay(l); od</span>
[>3.9-41 ViewSharedh5
</java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0


div=example
<span class="GAPprompt">gap></span> <span class="GAPinput">l := ShareObj([1,2,3,4,
<span class="GAPprompt">gap></span> <span class=">3.9-42 UNSAFE_VIEW
span="GAPprompt"gap;s><span""atomicl readonlydo
<span class=GAPprompt">>>></span> <span class="GAPinput">     <p>, the function by temporarilydisabling and guards regions so threads  corrupt rather producing.</>
<span class="GAPprompt">></span> <span class="GAPinput">   od;</span>
<span"APprompt>>GAPinputl3>
[ 6, 7, 8, 4, 5 ]
</pre></div>

<>Atomic statements must region. That that the precedence

<p><a id="X8789D7A57CFC13BCp>The<<

<4310<span="Heading"Atomic</span>>a "X860008F57EFE21C4"="800F57EFE21C4""

<pInstead atomic><>


<div class="example"><pre>
<span class="GAPprompt">gap
 classGAPpromptgts> < classGAPinputAdd, item/span
spanclass"gap>/span < class="GAPinput(MakeImmutable[,,])<spanspan="GAPprompt"gap">l := ShareObj[,2,];/span>
<>d>

<p><a id="X78883D5E83B4425F" name="X78883D5E83B4425F"></a></p>

<h4>3.11 <span class="Heading"p< id=X7F1E2F707F72371E="F1E2F707F72371E>/a>/pjava.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62

<p>There is an exception to the rule that objects ="">pre

< reasons symmetry

<p>Implementation note: The>3.9-39ClearRegionName>

<<id =""><a>/java.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62

<h5 ="GAPprompt>gt; GAPinputodspan

 classnName
<p><code div/>/divjava.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12

< intentthis is allow initialization objects multiple mayto a value . Only ; all   use return < class></code as  definitive of element also for lazy of in read-only</>

<p>The currentp<a idX8789D7A57CFC13BC java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

<p><a id="X8673539F7DA79110" namedivclass   be toatomic has  thoughswere   arguments   ="< <=>> willbelockedin asfor alock statement a argument preceded by neither code="odereadwrite> < class"readonly/> the corresponding object will belocked.:<

<1</>

div"">java.lang.StringIndexOutOfBoundsException: Range [95, 26) out of bounds for length 281
<p><code class="func">TestBindOnce</code> works like <code class="func">BindOnce</code> (<a href="chap3.html#X83AD36A68503CF70"><span class="RefLink">3.11-1</span =gt> span=GAPinput;<>

<>a="name=""/>p>

<h5>3.11-3 <p>he< class"func>

<div class="func"><table class="func" widthpIt generally to
<p><code class="func">BindOnceExpr<p< ="X83AD36A68503CF70" ="X83AD36A68503CF70">/>p>

<p>For positional objects


<div class="example"><pre>
BindOnceExprPosObj := function
  
BindOnce, ()java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
 java.lang.StringIndexOutOfBoundsException: Range [6, 7) out of bounds for length 6
    return obj![index
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
end;
</pre></div>

e for<p><code class="func">TestBindOnce</code> w/worksclass"< ("< class".1a)except it =eyw>true/> the could and keyw/></>

<p>The intent is << id ="">/>/>

<p><a id=h531-[1  java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11

<>3.11-4 TestBindOnceExpr</h5

<div=func classfunc classGAPprompt&<span=>:ShareObj23,)span
nceExprcodeworks codejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

pa= = obj

;>classfor[..3  li = l2<java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 6

<div class="func"><table class="func" width="100%"><tr>java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
<p><code class="func">StrictBindOnce</code> works intent avoid if  is


<div class


--> --------------------

--> maximum size reached

--> --------------------

100%


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