Here are examples of how to send, retrieve, and forward metadata between drivers using the //sdk/lib/driver/metadata
library.
The fuchsia.examples.metadata
FIDL library is an example of how to define metadata.
The sender
driver is an example of how a driver can send metadata to its child nodes.
The retriever
driver is an example of how a driver can retrieve metadata from parent node.
The forwarder
driver is an example of how a driver can forward metadata from its parent node to its child nodes.
Include the tests to your build by appending --with-test //examples/drivers/metadata:tests
to your fx set
command. For example:
$ fx set core.x64 --with-test //examples/drivers/metadata:tests $ fx build
Run unit tests with the command:
$ fx test metadata_example_test