- Quick Report For Delphi Xe2 Professional Learning
- Quick Report For Delphi Xe2 Professional Learning Manual
- Quick Report For Delphi Xe2 Professional Learning System
- Quick Report For Delphi Xe2 Professional Learning Software
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I am learning how to use OmniThreadLibrary in Delphi XE2, i wonder if someone can show me how to cancel a parallel.foreach.
I read that I should use a cancellation token, but I cannot find an example of some sort on how to use it.
This is the original for loop inside the function.
And this is how I am using the Parallel.ForEach
Inside the Parallel.ForEach I can't do
Result := 'ERROR'
because it is not captured inside the procedure, so I think if I can cancel the Parallel.ForEach and report that cancellation, then I can just assign Result := 'ERROR'
outside.Quick Report For Delphi Xe2 Professional Learning
But I am new to OmniThreadLibrary and I don't know how to do such a thing, please help me :)
sandiego206sandiego206
2 Answers
You need to use a cancellation token:
You obtain the cancellation token by calling
CreateOmniCancellationToken
from the OtlSync
unit.You then supply the token to the parallel loop:
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And you signal the cancellation token by calling its
Signal
method.From outside the parallel loop you can use
to detect that you cancelled. Or you can capture a boolean variable from the surrounding scope and pass the information through that variable.
The example here gives an illustration.
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Quick Report For Delphi Xe2 Professional Learning System
The cancellation token is only half of it. If you need it to return a value, you'll need to use
Aggregate
, because you can have an arbitrary number of elements in the sequence, but only one return value, so you need to collapse (aggregate) an arbitrary number of return values into one final value. So you want something like this:Kanokon ova 2 download torrent. Duration: 24 min Details: Kanokon's story revolves around Kouta Oyamada, a young first-year high school student who moves from the country to the city and thus transfers to Kunpō High School. Tags: kanokon Language: ja / Subs: en / Original:.avi. On his first day at his new school, a beautiful second-year female student named Chizuru Minamoto asks him to meet her alone in the music room. When he arrives, she reveals to him that she is in fact a fox deity and from that day on the two hang out together.
This may not be exactly perfect, but it should get you on the right track.
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