forked from BilalY/Rasagar
30 lines
1.4 KiB
Markdown
30 lines
1.4 KiB
Markdown
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# SharedStatic struct
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Burst has basic support for accessing static readonly data. However, if you want to share static mutable data between C# and HPC#, use the `SharedStatic<T>` struct.
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The following example shows accessing an `int` static field that both C# and HPC# can change:
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```C#
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public abstract class MutableStaticTest
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{
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public static readonly SharedStatic<int> IntField = SharedStatic<int>.GetOrCreate<MutableStaticTest, IntFieldKey>();
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// Define a Key type to identify IntField
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private class IntFieldKey {}
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}
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```
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C# and HPC# can then access this:
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```C#
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// Write to a shared static
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MutableStaticTest.IntField.Data = 5;
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// Read from a shared static
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var value = 1 + MutableStaticTest.IntField.Data;
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```
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When you use `SharedStatic<T>`, be aware of the following:
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* The `T` in `SharedStatic<T>` defines the data type.
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* To identify a static field, provide a context for it. To do this, create a key for both the containing type (for example, `MutableStaticTest` in the example above), identify the field (for example, `IntFieldKey` class in the example above) and pass these classes as generic arguments of `SharedStatic<int>.GetOrCreate<MutableStaticTest, IntFieldKey>()`.
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* Always initialize the shared static field in C# from a static constructor before accessing it from HPC#. If you don't initialize the data before accessing it, it might lead to an undefined initialization state.
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