Function getVariableSize [src]

Returns the length of the variable's data and its attributes.

Prototype

 pub fn getVariableSize( self: *const RuntimeServices, name: [*:0]const u16, guid: *const Guid, ) GetVariableSizeError!?struct { usize, VariableAttributes }

Parameters

self: *const RuntimeServicesname: [*:0]const u16guid: *const Guid

Possible Errors

DeviceError

Unexpected UnexpectedError

Unsupported

Source

  pub fn getVariableSize(
    self: *const RuntimeServices,
    name: [*:0]const u16,
    guid: *const Guid,
) GetVariableSizeError!?struct { usize, VariableAttributes } {
    var size: usize = 0;
    var attrs: VariableAttributes = undefined;

    switch (self._getVariable(
        name,
        guid,
        &attrs,
        &size,
        null,
    )) {
        .buffer_too_small => return .{ size, attrs },
        .not_found => return null,
        .device_error => return error.DeviceError,
        .unsupported => return error.Unsupported,
        else => |status| return uefi.unexpectedStatus(status),
    }
}  