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# C FFI module
A C FFI module is a dynamic library that exposes standard C functions and
constants, that Waybar can load and execute to create custom advanced widgets.
Most language can implement the required functions and constants (C, C++, Rust,
Go, Python, ...), meaning you can develop custom modules using your language of
choice, as long as there's GTK bindings.
Symbols to implement are documented in the
[waybar_cffi_module.h](waybar_cffi_module.h) file.
# Usage
## Building this module
```bash
meson setup build
meson compile -C build
```
## Load the module
Edit your waybar config:
```json
{
// ...
"modules-center": [
// ...
"cffi/c_example"
],
// ...
"cffi/c_example": {
// Path to the compiled dynamic library file
"module_path": "resources/custom_modules/cffi_example/build/wb_cffi_example.so"
}
}
```
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