L4 Namespace Reference

L4 low-level kernel interface. More...

Namespaces
namespace	Ipc
	IPC related functionality.
namespace	Ipc_svr
	Helper classes for L4::Server instantiation.
namespace	Typeid
	Definition of interface data-type helpers.
namespace	Types
	L4 basic type helpers for C++.

Data Structures
class	Alloc_list
	A simple list-based allocator. More...
class	Arm_smccc
	Wrapper for function calls that follow the ARM SMC/HVC calling convention. More...
class	Base_exception
	Base class for all exceptions, thrown by the L4Re framework. More...
class	Basic_registry
	This registry returns the corresponding server object based on the label of an Ipc_gate. More...
class	Bounds_error
	Access out of bounds. More...
class	Cap
	C++ interface for capabilities. More...
class	Cap_base
	Base class for all kinds of capabilities. More...
class	Com_error
	Error conditions during IPC. More...
class	Debugger
	C++ kernel debugger API. More...
class	Element_already_exists
	Exception for duplicate element insertions. More...
class	Element_not_found
	Exception for a failed lookup (element not found). More...
struct	Epiface
	Base class for interface implementations. More...
struct	Epiface_t
	Epiface implementation for Kobject-based interface implementations. More...
struct	Epiface_t0
	Epiface mixin for generic Kobject-based interfaces. More...
class	Exception
	Exception interface. More...
class	Exception_tracer
	Back-trace support for exceptions. More...
class	Factory
	C++ Factory interface, see Factory for the C interface. More...
class	Icu
	C++ Icu interface, see Interrupt controller for the C interface. More...
class	Invalid_capability
	Indicates that an invalid object was invoked. More...
class	Io_pager
	Io_pager interface. More...
class	Iommu
	Interface for IO-MMUs used for DMA remapping. More...
class	IOModifier
	Modifier class for the IO stream. More...
class	Ipc_gate
	The C++ IPC gate interface, see IPC-Gate API for the C interface. More...
class	Irq
	C++ Irq interface, see IRQs for the C interface. More...
class	Irq_eoi
	Interface for sending an unmask message to an object. More...
struct	Irq_handler_object
	Server object base class for handling IRQ messages. More...
struct	Irq_mux
	IRQ multiplexer for shared IRQs. More...
struct	Irqep_t
	Epiface implementation for interrupt handlers. More...
class	Kobject
	Base class for all kinds of kernel objects and remote objects, referenced by capabilities. More...
class	Kobject_2t
	Helper class to create an L4Re interface class that is derived from two base classes (see L4::Kobject_t). More...
struct	Kobject_3t
	Helper class to create an L4Re interface class that is derived from three base classes (see L4::Kobject_t). More...
struct	Kobject_demand
	Get the combined server-side resource requirements for all type T... More...
class	Kobject_t
	Helper class to create an L4Re interface class that is derived from a single base class. More...
struct	Kobject_typeid
	Meta object for handling access to type information of Kobjects. More...
struct	Kobject_typeid< void >
	Minimalistic ID for void interface. More...
struct	Kobject_x
	Generic Kobject inheritance template. More...
class	Meta
	Meta interface that shall be implemented by each L4Re object and gives access to the dynamic type information for L4Re objects. More...
class	Out_of_memory
	Exception signalling insufficient memory. More...
class	Pager
	Pager interface including the Io_pager interface. More...
class	Platform_control
	L4 C++ interface for controlling platform-wide properties, see Platform Control C API for the C interface. More...
class	Poll_timeout_counter
	Evaluate an expression for a maximum number of times. More...
class	Poll_timeout_kipclock
	A polling timeout based on the L4Re clock. More...
struct	Proto_t
	Data type for defining protocol numbers. More...
class	Rcv_endpoint
	Interface for kernel objects that allow to receive IPC from them. More...
class	Registry_iface
	Abstract interface for object registries. More...
class	Runtime_error
	Exception for an abstract runtime error. More...
class	Scheduler
	C++ interface of the Scheduler kernel object, see Scheduler for the C interface. More...
struct	Semaphore
	C++ Kernel-provided semaphore interface, see Kernel-provided semaphore for the C interface. More...
class	Server
	Basic server loop for handling client requests. More...
class	Server_object
	Abstract server object to be used with L4::Server and L4::Basic_registry. More...
struct	Server_object_t
	Base class (template) for server implementing server objects. More...
struct	Server_object_x
	Helper class to implement p_dispatch based server objects. More...
class	Smart_cap
	Smart capability class. More...
class	String
	A null-terminated string container class. More...
class	Task
	C++ interface of the Task kernel object, see Task for the C interface. More...
class	Thread
	C++ L4 kernel thread interface, see Thread for the C interface. More...
struct	Triggerable
	Interface that allows an object to be triggered by some source. More...
struct	Type_info
	Dynamic Type Information for L4Re Interfaces. More...
class	Uart
	Uart driver abstraction. More...
class	Uart_apb
	Driver for the Advanced Peripheral Bus (APB) UART from the Cortex-M System Design Kit (apb). More...
class	Unknown_error
	Exception for an unknown condition. More...
class	Vcon
	C++ L4 Vcon interface, see Virtual Console for the C interface. More...
class	Vm
	Virtual machine host address space. More...

Typedefs
typedef int	Opcode
	Data type for RPC opcodes.

Enumerations
enum	{ PROTO_ANY = 0 , PROTO_EMPTY = -19 }

Functions
void	throw_ipc_exception (L4::Cap< void > const &o, l4_msgtag_t const &err, l4_utcb_t *utcb)
	Throw an L4 IPC error as exception.
void	throw_ipc_exception (void const *o, l4_msgtag_t const &err, l4_utcb_t *utcb)
	Throw an L4 IPC error as exception.
template<typename T >
Type_info const *	kobject_typeid () noexcept
	Get the L4::Type_info for the L4Re interface given in T.
template<typename T , typename F >
Cap< T >	cap_dynamic_cast (Cap< F > const &c) noexcept
	dynamic_cast for capabilities.
template<typename T , typename F >
Cap< T >	cap_cast (Cap< F > const &c) noexcept
	static_cast for capabilities.
template<typename T , typename F >
Cap< T >	cap_reinterpret_cast (Cap< F > const &c) noexcept
	reinterpret_cast for capabilities.
template<typename T >
constexpr T	trunc_order (T val, unsigned char order)
	Round a value down so the given number of lsb is zero.
template<typename T >
constexpr T	round_order (T val, unsigned char order)
	Round a value up so the given number of lsb is zero.
template<typename T , typename F , typename SMART >
Smart_cap< T, SMART >	cap_cast (Smart_cap< F, SMART > const &c) noexcept
	static_cast for (smart) capabilities.
template<typename T , typename F , typename SMART >
Smart_cap< T, SMART >	cap_reinterpret_cast (Smart_cap< F, SMART > const &c) noexcept
	reinterpret_cast for (smart) capabilities.

Variables
IOModifier const	hex
	Modifies the stream to print numbers as hexadecimal values.
IOModifier const	dec
	Modifies the stream to print numbers as decimal values.
BasicOStream	cout
	Standard output stream.
BasicOStream	cerr
	Standard error stream.

Detailed Description

L4 low-level kernel interface.

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
PROTO_ANY	Default protocol used by Kobject_t and Kobject_x.
PROTO_EMPTY	Empty protocol for empty APIs.

Definition at line 55 of file __typeinfo.h.

Function Documentation

cap_cast() [1/2]

template<typename T , typename F >

Cap< T > L4::cap_cast ( Cap< F > const &  c )

inlinenoexcept

static_cast for capabilities.

Template Parameters

T	The target type of the capability
F	The source type (and is usually implicitly set)

Parameters

c	The source capability that shall be casted

Returns

A capability typed to the interface T.

The use of this cast operator is similar to the static_cast<>() for C++ pointers. It does the same type checking and adjustments like C++ does on pointers.

Example code:

L4::Cap<L4::Kobject> obj = ... ;
L4::Cap<L4::Icu> icu = L4::cap_cast<L4::Icu>(obj);

Definition at line 411 of file capability.h.

cap_cast() [2/2]

template<typename T , typename F , typename SMART >

Smart_cap< T, SMART > L4::cap_cast ( Smart_cap< F, SMART > const &  c )

inlinenoexcept

static_cast for (smart) capabilities.

Template Parameters

T	Type to cast the capability to.
F	(implicit) Type of the passed capability.
SMART	(implicit) Class implementing the Smart_cap interface.

Parameters

c	Capability to be casted.

Returns

A smart capability with new type T.

Definition at line 203 of file smart_capability.

cap_dynamic_cast()

template<typename T , typename F >

Cap< T > L4::cap_dynamic_cast ( Cap< F > const &  c )

inlinenoexcept

dynamic_cast for capabilities.

Template Parameters

T	The target type of the capability.
F	The source type (is usually implicitly set).

Parameters

c	The source capability that shall be casted.

Return values

Cap<T>	Capability of target interface T.
L4_INVALID_CAP	c does not support the target interface T or the L4::Meta interface.

The use of this cast operator is similar to the dynamic_cast<>() for C++ pointers. It also induces overhead, because it uses the meta interface (L4::Meta) to do runtime type checking.

Example code:

L4::Cap<L4::Kobject> obj = ... ;
L4::Cap<L4::Icu> icu = L4::cap_dynamic_cast<L4::Icu>(obj);

Definition at line 126 of file capability.

References l4_error().

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cap_reinterpret_cast() [1/2]

template<typename T , typename F >

Cap< T > L4::cap_reinterpret_cast ( Cap< F > const &  c )

inlinenoexcept

reinterpret_cast for capabilities.

Template Parameters

T	The target type of the capability
F	The source type (and is usually implicitly set)

Parameters

c	The source capability that shall be casted

Returns

A capability typed to the interface T.

The use of this cast operator is similar to the reinterpret_cast<>() for C++ pointers. It does not do any type checking or type adjustment.

Example code:

L4::Cap<L4::Kobject> obj = ... ;
L4::Cap<L4::Icu> icu = L4::cap_reinterpret_cast<L4::Icu>(obj);

Definition at line 442 of file capability.h.

cap_reinterpret_cast() [2/2]

template<typename T , typename F , typename SMART >

Smart_cap< T, SMART > L4::cap_reinterpret_cast ( Smart_cap< F, SMART > const &  c )

inlinenoexcept

reinterpret_cast for (smart) capabilities.

Template Parameters

T	Type to cast the capability to.
F	(implicit) Type of the passed capability.
SMART	(implicit) Class implementing the Smart_cap interface.

Parameters

c	Capability to be casted.

Returns

A smart capability with new type T.

Definition at line 222 of file smart_capability.

round_order()

template<typename T >

constexpr T L4::round_order ( T  val, unsigned char  order  )

constexpr

Round a value up so the given number of lsb is zero.

Template Parameters

T	The type of the value (shall be some integral type.

Parameters

val	The value to rund up to the next multiple of 2^order.
order	order (2^order) to round up to.

Returns

val rounded up to the next 2^order.

Definition at line 32 of file consts.

Referenced by L4Re::Dataspace::map_region().

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trunc_order()

template<typename T >

constexpr T L4::trunc_order ( T  val, unsigned char  order  )

constexpr

Round a value down so the given number of lsb is zero.

Template Parameters

T	The type of the value (shall be some integral type.

Parameters

val	The value where the given lsb shall be masked.
order	the number of least significant bits (lsb) to mask.

Returns

val with order lsb masked to zero.

Definition at line 18 of file consts.

Referenced by L4Re::Dataspace::map_region().

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