IPC related functionality. More...

Namespaces
namespace	Msg
	IPC Message related functionality.

Data Structures
struct	Array
	Array data type for dynamically sized arrays in RPCs. More...

struct	Array_in_buf
	Server-side copy in buffer for Array. More...

struct	Array_ref
	Array reference data type for arrays located in the message. More...

struct	As_value
	Pass the argument as plain data value. More...

class	Buf_item
	RPC warpper for a receive item. More...

struct	Call
	RPC attribute for a standard RPC call. More...

struct	Call_t
	RPC attribute for an RPC call with required rights. More...

struct	Call_zero_send_timeout
	RPC attribute for an RPC call, with zero send timeout. More...

class	Cap
	Capability type for RPC interfaces (see `L4::Cap<T>`). More...

class	Gen_fpage
	Generic RPC wrapper for L4 flex-pages. More...

struct	In_out
	Mark an argument as in-out argument. More...

class	Iostream
	Input/Output stream for IPC [un]marshalling. More...

class	Istream
	Input stream for IPC unmarshalling. More...

class	Msg_ptr
	Pointer to an element of type T in an Ipc::Istream. More...

struct	Opt
	Attribute for defining an optional RPC argument. More...

class	Ostream
	Output stream for IPC marshalling. More...

struct	Out
	Mark an argument as a output value in an RPC signature. More...

struct	Ret_array
	Dynamically sized output array of type T. More...

struct	Send_only
	RPC attribute for a send-only RPC. More...

class	Small_buf
	A receive item for receiving a single object capability. More...

class	Snd_item
	RPC wrapper for a send item. More...

class	Str_cp_in
	Abstraction for extracting a zero-terminated string from an Ipc::Istream. More...

class	Varg
	Variably sized RPC argument. More...

class	Varg_list
	Self-contained list of variable-sized RPC parameters. More...

class	Varg_list_ref
	List of variable-sized RPC parameters as received by the server. More...

Typedefs
typedef unsigned short	Array_len_default
	Default type for passing length of an array.

typedef Gen_fpage< Snd_item >	Snd_fpage
	Send flex-page.

typedef Gen_fpage< Buf_item >	Rcv_fpage
	Rcv flex-page.

Functions
template<typename T >
Cap< T >	make_cap (L4::Cap< T > cap, unsigned rights) noexcept
	Make an L4::Ipc::Cap<T> for the given capability and rights.

template<typename T >
Cap< T >	make_cap_rw (L4::Cap< T > cap) noexcept
	Make an L4::Ipc::Cap<T> for the given capability with L4_CAP_FPAGE_RW rights.

template<typename T >
Cap< T >	make_cap_rws (L4::Cap< T > cap) noexcept
	Make an L4::Ipc::Cap<T> for the given capability with L4_CAP_FPAGE_RWS rights.

template<typename T >
Cap< T >	make_cap_full (L4::Cap< T > cap) noexcept
	Make an L4::IPC::Cap<T> for the given capability with full fpage and object-specific rights.

template<typename T >
Internal::Buf_cp_out< T >	buf_cp_out (T const *v, unsigned long size)
	Insert an array into an Ipc::Ostream.

template<typename T >
Internal::Buf_cp_in< T >	buf_cp_in (T *v, unsigned long &size)
	Extract an array from an Ipc::Istream.

template<typename T >
Str_cp_in< T >	str_cp_in (T *v, unsigned long &size)
	Create a Str_cp_in for the given values.

template<typename T >
Msg_ptr< T >	msg_ptr (T *&p)
	Create an Msg_ptr to adjust the given pointer.

template<typename T >
Internal::Buf_in< T >	buf_in (T *&v, unsigned long &size)
	Return a pointer to stream array data.

template<typename T >
T	read (Istream &s)
	Read a value out of a stream.

Detailed Description

IPC related functionality.

Function Documentation

◆ buf_cp_in()

template<typename T >

Internal::Buf_cp_in< T > L4::Ipc::buf_cp_in	(	T *	v,
		unsigned long &	size
	)

Extract an array from an Ipc::Istream.

Parameters

	v	Pointer to the array that shall receive the values from the Ipc::Istream.
[in,out]	size	Input: the number of elements the array can take at most Output: the number of elements found in the stream.

buf_cp_in() can be used to extract an array from an Ipc::Istream. This is the counterpart buf_cp_out(). The data from the received message is thereby copied to the given buffer and size is set to the number of elements found in the stream. To avoid the copy operation buf_in() may be used instead.

See also: buf_in() and buf_cp_out().

Definition at line 170 of file ipc_stream.

◆ buf_cp_out()

template<typename T >

Internal::Buf_cp_out< T > L4::Ipc::buf_cp_out	(	T const *	v,
		unsigned long	size
	)

Insert an array into an Ipc::Ostream.

Parameters

v	Pointer to the array that shall be inserted into an Ipc::Ostream.
size	Number of elements in the array.

This function inserts an array (e.g. a string) into an Ipc::Ostream. The data is copied to the stream. On insertion into the Ipc::Ostream exactly the given number of elements of type T are copied to the message buffer, this means the source buffer is no longer referenced after insertion into the stream.

See also: The counterpart is either buf_cp_in() or buf_in().

Definition at line 111 of file ipc_stream.

◆ buf_in()

template<typename T >

Internal::Buf_in< T > L4::Ipc::buf_in	(	T *&	v,
		unsigned long &	size
	)

Return a pointer to stream array data.

Parameters

[out]	v	Pointer to the array within the Ipc::Istream.
[out]	size	The number of elements found in the stream.

This routine provdes a possibility to extract an array from an Ipc::Istream, without extra copy overhead. In contrast to buf_cp_in() the data is not copied to a buffer, but a pointer to the array is returned. The user must make sure the UTCB is not used for other purposes while the returned pointer is still in use.

The mechanism is comparable to that of Msg_ptr, however it handles arrays inserted with buf_cp_out().

See also: buf_cp_in() and buf_cp_out().

Definition at line 321 of file ipc_stream.

◆ make_cap()

template<typename T >

Cap< T > L4::Ipc::make_cap	(	L4::Cap< T >	cap,
		unsigned	rights
	)

noexcept

Make an L4::Ipc::Cap<T> for the given capability and rights.

Template Parameters

T	(IMPLICIT) type of the referenced interface

Parameters

cap	source capability (L4::Cap<T>)
rights	rights mask that shall be applied on transfer.

Definition at line 628 of file ipc_types.

Referenced by L4virtio::Svr::Driver_mem_region_t< DATA >::Driver_mem_region_t().

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◆ make_cap_full()

template<typename T >

Cap< T > L4::Ipc::make_cap_full ( L4::Cap< T > cap )

noexcept

Make an L4::IPC::Cap<T> for the given capability with full fpage and object-specific rights.

Template Parameters

T	(implicit) type of the referenced interface

Parameters

cap	source capability (L4::Cap<T>)

See also: L4_cap_fpage_rights; L4_obj_fpage_ctl

Note: Full rights (including object-specific rights) are required when mapping an IPC gate where the receiver should become the server, i.e. where the receiver wants to call L4::Ipc_gate::bind_thread().

Definition at line 666 of file ipc_types.

References L4_CAP_FPAGE_RWSD, and L4_FPAGE_C_OBJ_RIGHTS.

◆ make_cap_rw()

template<typename T >

Cap< T > L4::Ipc::make_cap_rw ( L4::Cap< T > cap )

noexcept

Make an L4::Ipc::Cap<T> for the given capability with L4_CAP_FPAGE_RW rights.

Template Parameters

T	(IMPLICIT) type of the referenced interface

Parameters

cap	source capability (L4::Cap<T>)

Examples: examples/libs/l4re/c++/mem_alloc/ma+rm.cc, examples/libs/l4re/c++/shared_ds/ds_clnt.cc, and examples/libs/l4re/c++/shared_ds/ds_srv.cc.

Definition at line 638 of file ipc_types.

References L4_CAP_FPAGE_RW.

Referenced by L4Re::Util::Event_buffer_t< PAYLOAD >::attach(), L4virtio::Driver::Device::driver_connect(), L4Re::Util::Event_t< PAYLOAD >::init(), L4Re::Util::Event_t< PAYLOAD >::init_poll(), L4virtio::Driver::Device::register_ds(), L4virtio::Driver::Virtio_net_device::setup_device(), and L4virtio::Driver::Block_device::setup_device().

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◆ make_cap_rws()

template<typename T >

Cap< T > L4::Ipc::make_cap_rws ( L4::Cap< T > cap )

noexcept

Make an L4::Ipc::Cap<T> for the given capability with L4_CAP_FPAGE_RWS rights.

Template Parameters

T	(IMPLICIT) type of the referenced interface

Parameters

cap	source capability (L4::Cap<T>)

Definition at line 648 of file ipc_types.

References L4_CAP_FPAGE_RWS.

◆ msg_ptr()

template<typename T >

Msg_ptr< T > L4::Ipc::msg_ptr ( T *& p )

Create an Msg_ptr to adjust the given pointer.

This function makes it more convenient to extract pointers to data in the message buffer itself from an Ipc::Istream. This may be used to avoid copy out of large data structures. (See Msg_ptr.)

Definition at line 263 of file ipc_stream.

◆ read()

template<typename T >

T L4::Ipc::read ( Istream & s )

inline

Read a value out of a stream.

Parameters

s	An Istream.

Returns: The value of type T.

The stream position is progressed accordingly.

Definition at line 1294 of file ipc_stream.

◆ str_cp_in()

template<typename T >

Str_cp_in< T > L4::Ipc::str_cp_in	(	T *	v,
		unsigned long &	size
	)

Create a Str_cp_in for the given values.

Parameters

	v	Pointer to the array that shall receive the values from the Ipc::Istream.
[in,out]	size	Input: the number of elements the array can take at most Output: the number of elements found in the stream.

This function makes it more convenient to extract arrays from an Ipc::Istream (

See also: Str_cp_in.)

Definition at line 224 of file ipc_stream.

Namespaces

Data Structures

Typedefs

Functions

Detailed Description

Function Documentation

◆ buf_cp_in()

◆ buf_cp_out()

◆ buf_in()

◆ make_cap()

◆ make_cap_full()

◆ make_cap_rw()

◆ make_cap_rws()

◆ msg_ptr()

◆ read()

◆ str_cp_in()