[ET Trac] [Einstein Toolkit] #875: Cactus should define 'restrict', with a value dependent on autoconf information

[Einstein Toolkit]

#875: Cactus should define 'restrict', with a value dependent on autoconf
information
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 Reporter:  knarf        |       Owner:                     
     Type:  enhancement  |      Status:  new                
 Priority:  minor        |   Milestone:                     
Component:  Cactus       |     Version:  development version
 Keywords:               |  
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 The Kranc ticket https://github.com/ianhinder/Kranc/issues/62 mentions
 arguments why to do this: to make certain optimizations possible. While
 'restrict' is not a C keyword, many compilers support it, leading to
 measurable speedup in cases. At the moment Cactus only defines
 CCTK_RESTRICT, but it has been commented that using this leads to ugly
 code. Defining 'restrict' would beautify this, as well as make it easier
 to directly use code which relies on 'restrict' being present (when this
 isn't actually the case, or is called differently).

 A counter argument would be that this would effectively introduce a
 keyword 'restrict' to Cactus. Code using this name already for something
 else would need to be changed. Given the positive effects of this change I
 would say that this outweights this potential problem.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/875>
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