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Residue is thread safe if CGAL_HAS_THREADS is defined

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Michael Hemmer 2008-09-16 11:47:30 +00:00
parent a38f0b2903
commit 8feb631dec
1 changed files with 8 additions and 1 deletions
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9
Modular_arithmetic/doc_tex/Modular_arithmetic_ref/Residue.tex
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@ -18,7 +18,14 @@ Since the type is based on double
arithmetic the prime is restricted to values less than $2^{26}$.
The initial value of $p$ is 67111067.
Note that due to the static prime the type is not thread-safe.
In case the flag \ccc{CGAL_HAS_THREADS}
is undefined the prime is just stored in a static member
of the class, that is, \ccRefName\ is not thread-safe in this case.
In case \ccc{CGAL_HAS_THREADS}
the implementation of the class is thread safe using
\ccc{boost::thread_specific_ptr}. However, this may cause some performance
penalty. Hence, it may be advisable to configure \ccc{CGAL} with
\ccc{CGAL_HAS_NO_THREADS}.
\ccInclude{CGAL/Residue.h}