efw 0.1.0

Framework for writing UEFI applications
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use super::*;

pub trait Protocol: core::marker::Sized {
    const PROTOCOL_GUID: bits::Guid;

    unsafe fn new(ptr: *mut core::ffi::c_void) -> Self;

    fn find_supporting_handles() -> Result<Vec<Handle>> {
        unsafe {
            SystemTable::get().boot_services().locate_handle(bits::LocateSearchType::ByProtocol, &Self::PROTOCOL_GUID as *const _ as *mut _, 0 as _)
        }
    }

    fn find_instances() -> Result<Vec<Self>> {
        let handles = Self::find_supporting_handles()?;
        let instances = handles.iter().map(|handle| {
            unsafe {
                Self::new(SystemTable::get().boot_services().handle_protocol(handle.clone(), &Self::PROTOCOL_GUID as *const _ as *mut _).unwrap())
            }
        }).collect();
        Ok(instances)
    }
}