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What Collections types support parallell writing?

Discussion in 'Entity Component System' started by rogerdv, Sep 30, 2019.

  1. rogerdv

    rogerdv

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    Is there some that let me safely write values from different jobs?
     
    rogerdv, Sep 30, 2019
    #1

  2. tertle

    tertle

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    Anything with AsParallellWriter

    NativeQueue
    Native[Multi]HashMap
    NativeStream
     
    tertle, Sep 30, 2019
    #2

  3. rogerdv

    rogerdv

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    Well, my knowledge of C++ STL is a bit rusty, but NativeMultiHashMap is like an array where indexes can be repeated? Sounds like the kind of data structure I need right now.
     
    rogerdv, Sep 30, 2019
    #3

  4. tertle

    tertle

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    NativeHashMap : Dictionary<Key, Value>
    NativeMultiHashMap : Dictionary<Key, List<Value>>
     
    tertle, Sep 30, 2019
    #4

  5. rogerdv

    rogerdv

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    NativeHash is like a NativeDictionary?
     
    rogerdv, Sep 30, 2019
    #5

  6. tertle

    tertle

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    NativeHashMap<TKey, TValue> is a replacement for Dictionary<TKey, TValue>
     
    tertle, Sep 30, 2019
    #6

  7. Jyskal

    Jyskal

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    Indexes are not repeat but you can store multiple values under the same index in a List. TryGetFirstValue() and TryGetNextValue() should be used.
     
    Jyskal, Oct 1, 2019
    #7

  8. eizenhorn

    eizenhorn

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    Technically they repeat. If you look at source code (TryGetFirstValueAtomic\TryGetNextValueAtomic) it has pointer to keys array and next iteration of TryGetNextValueAtomic "grows" entryIdx from next pointer, thus in keys array key can repeat, and this is why you get duplicates if you call GetKeyArray on NMHM.
     
    eizenhorn, Oct 1, 2019
    #8