L4::Meta Class Reference

Meta interface that shall be implemented by each L4Re object and gives access to the dynamic type information for L4Re objects. More...

#include <meta>

Inheritance diagram for L4::Meta:

Collaboration diagram for L4::Meta:

Public Member Functions
l4_msgtag_t	num_interfaces ()
	Get the number of interfaces implemented by this object.
l4_msgtag_t	interface (l4_umword_t idx, long *proto, L4::Ipc::String< char > *name)
	Get the protocol number that must be used for the interface with the number idx.
l4_msgtag_t	supports (l4_mword_t protocol)
	Figure out if the object supports the given protocol (number).
Public Member Functions inherited from L4::Kobject
l4_msgtag_t	dec_refcnt (l4_mword_t diff, l4_utcb_t *utcb=l4_utcb())
	Decrement the in kernel reference counter for the object.

Additional Inherited Members
Protected Types inherited from L4::Kobject_t< Meta, Kobject, L4_PROTO_META >
typedef Meta	Class
	The target interface type (inheriting from Kobject_t).
typedef Typeid::Iface< PROTO, Meta >	__Iface
	The interface description for the derived class.
typedef Typeid::Merge_list< Typeid::Iface_list< __Iface >, typename Kobject::__Iface_list >	__Iface_list
	The list of all RPC interfaces provided directly or through inheritance.
Protected Member Functions inherited from L4::Kobject_t< Meta, Kobject, L4_PROTO_META >
L4::Cap< Class >	c () const noexcept
	Get the capability to ourselves.
Protected Member Functions inherited from L4::Kobject
l4_cap_idx_t	cap () const noexcept
	Return capability selector.
Static Protected Member Functions inherited from L4::Kobject_t< Meta, Kobject, L4_PROTO_META >
static void	__check_protocols__ () noexcept
	Helper to check for protocol conflicts.

Detailed Description

Meta interface that shall be implemented by each L4Re object and gives access to the dynamic type information for L4Re objects.

Definition at line 26 of file meta.

Member Function Documentation

interface()

l4_msgtag_t L4::Meta::interface	(	l4_umword_t	idx,
		long *	proto,
		L4::Ipc::String< char > *	name )

Get the protocol number that must be used for the interface with the number idx.

Parameters

	idx	The index of the interface to get the protocol number for. idx must be >= 0 and < the return value of num_interfaces().
[out]	proto	The protocol number for interface idx.
[out]	name	The protocol name for interface idx.

Return values

l4_msgtag_t::label() == 0	Successful; see `proto` and `name`.
l4_msgtag_t::label() < 0	Error code.

Referenced by num_interfaces().

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num_interfaces()

l4_msgtag_t L4::Meta::num_interfaces

(

)

Get the number of interfaces implemented by this object.

Return values

l4_msgtag_t::label() >= 0	The number of supported interfaces.
l4_msgtag_t::label() < 0	Error code of the occurred error.

References interface(), and num_interfaces().

Referenced by num_interfaces().

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supports()

l4_msgtag_t L4::Meta::supports

(

l4_mword_t

protocol

)

Figure out if the object supports the given protocol (number).

Parameters

protocol

The protocol number to check for.

Return values

l4_msgtag_t::label() == 1	protocol is supported.
l4_msgtag_t::label() == 0	protocol is not supported.

This method is intended to be used for statically assigned protocol numbers.

References supports().

Referenced by supports().

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The documentation for this class was generated from the following file:

• l4/sys/meta