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22 lines
859 B
Markdown
22 lines
859 B
Markdown
---
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title: atomic
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---
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{{< callout type="info">}}
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Header: `atomic.h`
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Since: `TBC`
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Similar to: [atomic](https://en.cppreference.com/cpp/atomic/atomic)
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{{< /callout >}}
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This header attempts to replicate some of the types from `std::atomic`.
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If `ETL_CPP11_SUPPORTED` is defined as `1` in the profile then `etl::atomic` will be defined in terms of `std::atomic`.
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Otherwise it will be implemented in terms of the built-in support, if available, from the compiler. For example, early GCC and Arm compilers will use the `__sync` built-ins.
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If a type cannot be handled by the built-ins then the types are wrapped by `etl::mutex`.
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If there is an ETL atomic type available for your platform then `ETL_HAS_ATOMIC` will be set to `1`, otherwise
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it will be set to `0`.
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From: `20.40.0` `etl::atomic` supports the `is_always_lock_free` property.
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