pub struct DatagramBased { /* private fields */ }
Expand description
Interface for socket-like objects with datagram semantics.
A GDatagramBased
is a networking interface for representing datagram-based
communications. It is a more or less direct mapping of the core parts of the
BSD socket API in a portable GObject interface. It is implemented by
Socket
, which wraps the UNIX socket API on UNIX and winsock2 on Windows.
GDatagramBased
is entirely platform independent, and is intended to be used
alongside higher-level networking APIs such as IOStream
.
It uses vectored scatter/gather I/O by default, allowing for many messages
to be sent or received in a single call. Where possible, implementations of
the interface should take advantage of vectored I/O to minimise processing
or system calls. For example, GSocket
uses recvmmsg()
and sendmmsg()
where possible. Callers should take advantage of scatter/gather I/O (the use of
multiple buffers per message) to avoid unnecessary copying of data to
assemble or disassemble a message.
Each GDatagramBased
operation has a timeout parameter which may be negative
for blocking behaviour, zero for non-blocking behaviour, or positive for
timeout behaviour. A blocking operation blocks until finished or there is an
error. A non-blocking operation will return immediately with a
G_IO_ERROR_WOULD_BLOCK
error if it cannot make progress. A timeout operation
will block until the operation is complete or the timeout expires; if the
timeout expires it will return what progress it made, or
G_IO_ERROR_TIMED_OUT
if no progress was made. To know when a call would
successfully run you can call DatagramBasedExt::condition_check()
or
DatagramBasedExtManual::condition_wait()
. You can also use
DatagramBasedExtManual::create_source()
and attach it to a glib::MainContext
to get callbacks when I/O is possible.
When running a non-blocking operation applications should always be able to
handle getting a G_IO_ERROR_WOULD_BLOCK
error even when some other function
said that I/O was possible. This can easily happen in case of a race
condition in the application, but it can also happen for other reasons. For
instance, on Windows a socket is always seen as writable until a write
returns G_IO_ERROR_WOULD_BLOCK
.
As with GSocket
, GDatagramBased
s can be either connection oriented (for
example, SCTP) or connectionless (for example, UDP). GDatagramBased
s must be
datagram-based, not stream-based. The interface does not cover connection
establishment — use methods on the underlying type to establish a connection
before sending and receiving data through the GDatagramBased
API. For
connectionless socket types the target/source address is specified or
received in each I/O operation.
Like most other APIs in GLib, GDatagramBased
is not inherently thread safe.
To use a GDatagramBased
concurrently from multiple threads, you must
implement your own locking.
§Implements
DatagramBasedExt
, DatagramBasedExtManual
GLib type: GObject with reference counted clone semantics.
Implementations§
Source§impl DatagramBased
impl DatagramBased
pub const NONE: Option<&'static DatagramBased> = None
Trait Implementations§
Source§impl Clone for DatagramBased
impl Clone for DatagramBased
Source§impl Debug for DatagramBased
impl Debug for DatagramBased
Source§impl HasParamSpec for DatagramBased
impl HasParamSpec for DatagramBased
type ParamSpec = ParamSpecObject
Source§type SetValue = DatagramBased
type SetValue = DatagramBased
type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, DatagramBased>
fn param_spec_builder() -> Self::BuilderFn
Source§impl Hash for DatagramBased
impl Hash for DatagramBased
Source§impl Ord for DatagramBased
impl Ord for DatagramBased
Source§fn cmp(&self, other: &Self) -> Ordering
fn cmp(&self, other: &Self) -> Ordering
Comparison for two GObjects.
Compares the memory addresses of the provided objects.
1.21.0 · Source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
Source§impl<OT: ObjectType> PartialEq<OT> for DatagramBased
impl<OT: ObjectType> PartialEq<OT> for DatagramBased
Source§impl<OT: ObjectType> PartialOrd<OT> for DatagramBased
impl<OT: ObjectType> PartialOrd<OT> for DatagramBased
Source§impl StaticType for DatagramBased
impl StaticType for DatagramBased
Source§fn static_type() -> Type
fn static_type() -> Type
Self
.impl Eq for DatagramBased
impl IsA<DatagramBased> for Socket
Auto Trait Implementations§
impl Freeze for DatagramBased
impl RefUnwindSafe for DatagramBased
impl !Send for DatagramBased
impl !Sync for DatagramBased
impl Unpin for DatagramBased
impl UnwindSafe for DatagramBased
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)Source§impl<O> DatagramBasedExt for Owhere
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name: Option<&str>,
f: F,
) -> SignalHandlerId
unsafe fn connect_notify_unsafe<F>( &self, name: Option<&str>, f: F, ) -> SignalHandlerId
notify
signal of the object. Read more