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Openmp parallel iterator improvements (#9493)

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* More flexibility in OpenMP pragma
* Use static to constrain to compile-time annotation string
* Update changelog with OpenMP change
This commit is contained in:
Mamy Ratsimbazafy
2018-10-25 18:09:35 +02:00
committed by Andreas Rumpf
parent c844a9169c
commit 5b97762787
4 changed files with 13 additions and 8 deletions
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lib/system.nim
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@@ -2186,10 +2186,14 @@ else:
inc(res)
iterator `||`*[S, T](a: S, b: T, annotation=""): T {.
iterator `||`*[S, T](a: S, b: T, annotation: static string = "parallel for"): T {.
inline, magic: "OmpParFor", sideEffect.} =
## parallel loop iterator. Same as `..` but the loop may run in parallel.
## OpenMP parallel loop iterator. Same as `..` but the loop may run in parallel.
## `annotation` is an additional annotation for the code generator to use.
## The default annotation is `parallel for`.
## Please refer to the `OpenMP Syntax Reference<https://www.openmp.org/wp-content/uploads/OpenMP-4.5-1115-CPP-web.pdf>`_
## for further information.
##
## Note that the compiler maps that to
## the ``#pragma omp parallel for`` construct of `OpenMP`:idx: and as
## such isn't aware of the parallelism in your code! Be careful! Later