Trait kernel::platform::SyscallDriverLookup[][src]

pub trait SyscallDriverLookup {
    fn with_driver<F, R>(&self, driver_num: usize, f: F) -> R
    where
        F: FnOnce(Option<&dyn SyscallDriver>) -> R
; }
Expand description

Configure the system call dispatch mapping.

Each board should define a struct which implements this trait. This trait is the core for how syscall dispatching is handled, and the implementation is responsible for dispatching to drivers for each system call number.

Example

struct Hail {
    console: &'static capsules::console::Console<'static>,
    ipc: kernel::ipc::IPC,
    dac: &'static capsules::dac::Dac<'static>,
}

impl SyscallDriverLookup for Hail {
    fn with_driver<F, R>(&self, driver_num: usize, f: F) -> R
    where
        F: FnOnce(Option<&dyn kernel::SyscallDriver>) -> R,
    {
        match driver_num {
            capsules::console::DRIVER_NUM => f(Some(self.console)),
            kernel::ipc::DRIVER_NUM => f(Some(&self.ipc)),
            capsules::dac::DRIVER_NUM => f(Some(self.dac)),

            _ => f(None),
        }
    }
}

Required methods

Platform-specific mapping of syscall numbers to objects that implement the Driver methods for that syscall.

An implementation

Implementors