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13 lines
647 B
Markdown
13 lines
647 B
Markdown
# Thread-Safety
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QPromise is thread-safe and can be copied and accessed across different threads. QPromise relies on
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[explicitly data sharing](https://doc.qt.io/qt-5/qexplicitlyshareddatapointer.html#details) and thus
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`auto p2 = p1` represents the same promise: when `p1` resolves, handlers registered on `p1` and `p2`
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are called, the fulfilled value being shared between both instances.
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::: warning IMPORTANT
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While it's safe to access the resolved value from different threads using [`then`](qpromise/then.md),
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QPromise provides no guarantee about the object being pointed to. Thread-safety and reentrancy rules
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for that object still apply.
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:::
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