Function locateHandleLen [src]

Returns the number of handles that match the given search criteria.

Prototype

pub fn locateHandleLen(self: *const BootServices, search: LocateSearch) NumHandlesError!usize

Parameters

self: *const BootServicessearch: LocateSearch

Possible Errors

OutOfResources

Unexpected UnexpectedError

Source

  pub fn locateHandleLen(self: *const BootServices, search: LocateSearch) NumHandlesError!usize {
    var len: usize = 0;
    switch (self._locateHandle(
        std.meta.activeTag(search),
        if (search == .by_protocol) search.by_protocol else null,
        if (search == .by_register_notify) search.by_register_notify else null,
        &len,
        null,
    )) {
        .success => return @divExact(len, @sizeOf(Handle)),
        .out_of_resources => return error.OutOfResources,
        else => |status| return uefi.unexpectedStatus(status),
    }
}  