Struct MapIfSafeError 

pub struct MapIfSafeError {
    pub(crate) inner: MapIfSafeErrorInner,
}

Error returned by MmapOptions::map_if_safe().

Allows you to distinguish between three failure modes:

• Safe mapping is not supported on this platform.
• Trying to map an unsafe file descriptor.
• The map attempt itself failed.

The error is convertible to std::io::Error.

Fields

inner: MapIfSafeErrorInner

Implementations

impl MapIfSafeError

pub(crate) fn new_not_supported() -> Self

pub(crate) fn new_not_safe(reason: Error) -> Self

pub(crate) fn new_map_failed(reason: Error) -> Self

pub fn not_supported(&self) -> bool

Indicates that safe mapping is not supported at all on this platform.

pub fn not_safe(&self) -> bool

Indicates if the map was refused because mapping the file descriptor is not safe.

pub fn map_failed(&self) -> bool

Indicates if the file descriptor to be mapped was considered safe, but the mapping itself failed.

Trait Implementations

impl Debug for MapIfSafeError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for MapIfSafeError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for MapIfSafeError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<MapIfSafeError> for Error

fn from(value: MapIfSafeError) -> Self

Converts to this type from the input type.