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26 lines
1.1 KiB
TeX
26 lines
1.1 KiB
TeX
%\pagebreak
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\section{Binding of \kcode{barrier} Regions}
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\label{sec:barrier_regions}
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\index{binding!barrier regions@\kcode{barrier} regions}
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The binding rules call for a \kcode{barrier} region to bind to the closest enclosing
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\kcode{parallel} region.
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In the following example, the call from the main program to \ucode{sub2} is conforming
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because the \kcode{barrier} region (in \ucode{sub3}) binds to the \kcode{parallel}
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region in \ucode{sub2}. The call from the main program to \ucode{sub1} is conforming
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because the \kcode{barrier} region binds to the \kcode{parallel} region in subroutine
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\ucode{sub2}.
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The call from the main program to \ucode{sub3} is conforming because the \kcode{barrier}
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region binds to the implicit inactive \kcode{parallel} region enclosing the sequential
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part. Also note that the \kcode{barrier} region in \ucode{sub3} when called from
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\ucode{sub2} only synchronizes the team of threads in the enclosing \kcode{parallel}
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region and not all the threads created in \ucode{sub1}.
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\cexample{barrier_regions}{1}
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\fexample{barrier_regions}{1}
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