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# WAMR

The module provides integration with [WebAssembly Micro Runtime](https://github.com/bytecodealliance/wasm-micro-runtime)
for executing WASM code,
adding a number of runtime-specific directives
to the [wasm_modules](https://en.angie.software//angie/docs/configuration/modules/wasm/index.md#wasm-modules) context.

In our repositories, the module is built
[dynamically](https://en.angie.software//angie/docs/installation/index.md#install-dynamicmodules)
and is available as a separate package named `angie-module-wamr`.

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## Configuration Example

```nginx
wasm_modules {

    wamr_heap_size 16k;

    wamr_stack_size 16k;

    load fft_transform.wasm id=fft;
}
```

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## Directives

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### wamr_heap_size

| [Syntax](https://en.angie.software//angie/docs/configuration/configfile.md#configfile)   | `wamr_heap_size` size;   |
|------------------------------------------------------------------------------------------|--------------------------|
| Default                                                                                  | `wamr_heap_size 8k;`     |
| [Context](https://en.angie.software//angie/docs/configuration/configfile.md#configfile)  | wasm_modules             |

Sets the heap [size](https://en.angie.software//angie/docs/configuration/configfile.md#syntax) for an individual module instance.

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### wamr_global_heap_size

| [Syntax](https://en.angie.software//angie/docs/configuration/configfile.md#configfile)   | `wamr_global_heap_size` size;   |
|------------------------------------------------------------------------------------------|---------------------------------|
| Default                                                                                  | `wamr_global_heap_size 1m;`     |
| [Context](https://en.angie.software//angie/docs/configuration/configfile.md#configfile)  | wasm_modules                    |

Sets the heap [size](https://en.angie.software//angie/docs/configuration/configfile.md#syntax) for the entire WAMR runtime.

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### wamr_stack_size

| [Syntax](https://en.angie.software//angie/docs/configuration/configfile.md#configfile)   | `wamr_stack_size` size;   |
|------------------------------------------------------------------------------------------|---------------------------|
| Default                                                                                  | `wamr_stack_size 8k;`     |
| [Context](https://en.angie.software//angie/docs/configuration/configfile.md#configfile)  | wasm_modules              |

Sets the stack [size](https://en.angie.software//angie/docs/configuration/configfile.md#syntax) for an individual module instance.