This class is a class representing a pipe in the TANGO device server pattern. More...

#include "tango.h"

Inheritance diagram for Tango::Pipe:

Collaboration diagram for Tango::Pipe:

Public Member Functions
Constructors
Miscellaneous constructors
	Pipe ()
	Constructs a newly allocated Pipe object. More...

	Pipe (const string &name, const Tango::DispLevel level, const PipeWriteType pwt=PIPE_READ)
	Constructs a newly allocated Pipe object from its name and its display level. More...

Destructor
Only one destructor is defined for this class
virtual	~Pipe ()
	The object desctructor.

Get/Set object members.
These methods allows the external world to get/set Pipe instance data members
string &	get_name ()
	Return the pipe name. More...

void	set_name (string &new_name)
	Set the pipe name. More...

void	set_default_properties (UserDefaultPipeProp &prop)
	Set default attribute properties. More...

string &	get_lower_name ()
	Return the pipe name in lower case letters. More...

const string &	get_root_blob_name ()
	Return the root data blob name. More...

void	set_root_blob_name (const string &name)
	Set the root data blob name. More...

string &	get_desc ()
	Return the pipe description. More...

string &	get_label ()
	Return the pipe label. More...

Tango::DispLevel	get_disp_level ()
	Return the pipe display level. More...

Tango::PipeWriteType	get_writable ()
	Get the pipe writable type (RO/RW). More...

void	set_pipe_serial_model (PipeSerialModel ser_model)
	Set pipe serialization model. More...

PipeSerialModel	get_pipe_serial_model ()
	Get pipe serialization model. More...

void	set_user_pipe_mutex (omni_mutex *mut_ptr)
	Set pipe user mutex. More...

Inserting data into a DevicePipe
Pipe &	operator<< (short &datum)
	Insert data into a device pipe. More...

void	set_data_elt_nb (size_t nb)
	Set blob data element number. More...

void	set_data_elt_names (vector< string > &names)
	Set blob data element number and names. More...

size_t	get_data_elt_nb ()
	Get blob data element number. More...

Exception and error related methods methods
void	exceptions (bitset< DevicePipeBlob::numFlags > fl)
	Set exception flag. More...

bitset< DevicePipeBlob::numFlags >	exceptions ()
	Get exception flag. More...

void	reset_exceptions (DevicePipeBlob::except_flags fl)
	Reset one exception flag. More...

void	set_exceptions (DevicePipeBlob::except_flags fl)
	Set one exception flag. More...

bool	has_failed ()
	Check insertion/extraction success. More...

bitset< DevicePipeBlob::numFlags >	state ()
	Get instance insertion/extraction state. More...

Protected Attributes
Class data members
string	name
	The pipe name.

string	lower_name
	The pipe name in lower case.

string	desc
	The pipe description.

string	label
	The pipe label.

Tango::DispLevel	disp_level
	The pipe display level.

Tango::PipeWriteType	writable
	The pipe R/W type.

Detailed Description

This class is a class representing a pipe in the TANGO device server pattern.

It is an abstract class. It is the root class for all pipe related classes.

$Author$ $Revision$

Constructor & Destructor Documentation

◆ Pipe() [1/2]

Tango::Pipe::Pipe ( )

inline

Constructs a newly allocated Pipe object.

The default constructor

◆ Pipe() [2/2]

Tango::Pipe::Pipe	(	const string &	name,
		const Tango::DispLevel	level,
		const PipeWriteType	pwt = `PIPE_READ`
	)

Constructs a newly allocated Pipe object from its name and its display level.

Parameters

name	The pipe name
level	The pipe display level
pwt	The pipe R/W type (default to READ)

Member Function Documentation

◆ exceptions() [1/2]

bitset<DevicePipeBlob::numFlags> Tango::Pipe::exceptions ( )

inline

Get exception flag.

Returns the whole exception flags. The following is an example of how to use these exceptions related methods

Pipe pi;
 
bitset<DevicePipeBlob::numFlags> bs = pi.exceptions();
cout << "bs = " << bs << endl;
 
pi.set_exceptions(DevicePipeBlob::wrongtype_flag);
bs = pi.exceptions();
 
cout << "bs = " << bs << endl;

Returns: The exception flag

References Tango::DevicePipeBlob::exceptions().

◆ exceptions() [2/2]

void Tango::Pipe::exceptions ( bitset< DevicePipeBlob::numFlags > fl )

inline

Set exception flag.

It's a method which allows the user to switch on/off exception throwing when trying to insert/extract data from a Pipe object. The following flags are supported :

isempty_flag - throw a WrongData exception (reason = API_EmptyDataElement) if user tries to extract data from one empty blob data element. By default, this flag is set
wrongtype_flag - throw a WrongData exception (reason = API_IncompatibleArgumentType) if user tries to extract data with a type different than the type used for insertion. By default, this flag is set
notenoughde_flag - throw a WrongData exception (reason = API_PipeWrongArg) if user tries to extract data from a DevicePipeBlob for a data element which does not exist. By default, this flag is set
blobdenamenotset_flag - Throw a WrongData exception (reason = API_PipeNoDataElement) if user tries to insert data into the blob while the name or number of data element has not been set with methods set_data_elt_nb() or set_data_elt_names()
mixing_flag - Throw a WrongData exception (reason = API_NotSupportedFeature) if user tries to mix insertion/extraction method (<< or >>) with operator[]

Parameters

[in] fl The exception flag

References Tango::DevicePipeBlob::exceptions().

◆ get_data_elt_nb()

size_t Tango::Pipe::get_data_elt_nb ( )

inline

Get blob data element number.

Get the blob data element number

Returns: The blob data element number

References Tango::DevicePipeBlob::get_data_elt_nb().

◆ get_desc()

string& Tango::Pipe::get_desc ( )

inline

Return the pipe description.

Returns: The pipe description

References desc.

◆ get_disp_level()

Tango::DispLevel Tango::Pipe::get_disp_level ( )

inline

Return the pipe display level.

Returns: The pipe display level

References disp_level.

◆ get_label()

string& Tango::Pipe::get_label ( )

inline

Return the pipe label.

Returns: The pipe label

References label.

◆ get_lower_name()

string& Tango::Pipe::get_lower_name ( )

inline

Return the pipe name in lower case letters.

Returns: The pipe name

References lower_name.

◆ get_name()

string& Tango::Pipe::get_name ( )

inline

Return the pipe name.

Returns: The pipe name

References name.

◆ get_pipe_serial_model()

PipeSerialModel Tango::Pipe::get_pipe_serial_model ( )

inline

Get pipe serialization model.

Get the pipe serialization model

Returns: The pipe serialization model

◆ get_root_blob_name()

const string& Tango::Pipe::get_root_blob_name ( )

inline

Return the root data blob name.

Returns: The data blob name

References Tango::DevicePipeBlob::get_name().

◆ get_writable()

Tango::PipeWriteType Tango::Pipe::get_writable ( )

inline

Get the pipe writable type (RO/RW).

Returns: The pipe write type.

References writable.

◆ has_failed()

bool Tango::Pipe::has_failed ( )

inline

Check insertion/extraction success.

Allow the user to check if insertion/extraction into/from Pipe instance was successfull. This method has to be used when exceptions are disabled.

Returns: True if insertion/extraction has failed

References Tango::DevicePipeBlob::has_failed().

◆ operator<<()

Pipe& Tango::Pipe::operator<< ( short & datum )

Insert data into a device pipe.

Inserting data into a Pipe instance is simlar to inserting data into a DevicePipeBlob class instance. See doc of DevicePipeBlob class insertion methods (DevicePipeBlob::operator<<) to get a complete documentation on how to insert data into a Pipe object

Parameters

[in] datum The data to be inserted into the Pipe object

Exceptions

WrongData if requested

◆ reset_exceptions()

void Tango::Pipe::reset_exceptions ( DevicePipeBlob::except_flags fl )

inline

Reset one exception flag.

Resets one exception flag

Parameters

[in] fl The exception flag

References Tango::DevicePipeBlob::reset_exceptions().

◆ set_data_elt_names()

void Tango::Pipe::set_data_elt_names ( vector< string > & names )

inline

Set blob data element number and names.

Set the blob data element number and names. The data element number is the number of names in the input parameter.

Parameters

[in] names The blob data element names

References Tango::DevicePipeBlob::set_data_elt_names().

◆ set_data_elt_nb()

void Tango::Pipe::set_data_elt_nb ( size_t nb )

inline

Set blob data element number.

Set the blob data element number

Parameters

[in] nb The blob data element number

References Tango::DevicePipeBlob::set_data_elt_nb().

◆ set_default_properties()

void Tango::Pipe::set_default_properties ( UserDefaultPipeProp & prop )

Set default attribute properties.

Parameters

prop	The user default property class

◆ set_exceptions()

void Tango::Pipe::set_exceptions ( DevicePipeBlob::except_flags fl )

inline

Set one exception flag.

Sets one exception flag. See DevicePipeBlob::exceptions() for a usage example.

Parameters

[in] fl The exception flag

References Tango::DevicePipeBlob::set_exceptions().

◆ set_name()

void Tango::Pipe::set_name ( string & new_name )

inline

Set the pipe name.

Parameters

new_name The new pipe name

References name.

◆ set_pipe_serial_model()

void Tango::Pipe::set_pipe_serial_model ( PipeSerialModel ser_model )

Set pipe serialization model.

This method allows the user to choose the pipe serialization model.

Parameters

[in] ser_model The new serialisation model. The serialization model must be one of PIPE_BY_KERNEL, PIPE_BY_USER or PIPE_NO_SYNC

◆ set_root_blob_name()

void Tango::Pipe::set_root_blob_name ( const string & name )

inline

Set the root data blob name.

Parameters

[in] name The root data blob name

References name, and Tango::DevicePipeBlob::set_name().

◆ set_user_pipe_mutex()

void Tango::Pipe::set_user_pipe_mutex ( omni_mutex * mut_ptr )

inline

Set pipe user mutex.

This method allows the user to give to the pipe object the pointer to the omni_mutex used to protect its buffer. The mutex has to be locked when passed to this method. The Tango kernel will unlock it when the data will be transferred to the client.

Parameters

[in] mut_ptr The user mutex pointer

◆ state()

bitset<DevicePipeBlob::numFlags> Tango::Pipe::state ( )

inline

Get instance insertion/extraction state.

Allow the user to find out what was the reason of insertion/extraction into/from Pipe failure. This method has to be used when exceptions are disabled. Here is an example of how methods has_failed() and state() could be used

Pipe dpb = ....
 
bitset<DevicePipeBlob::numFlags> bs;
bs.reset();
dpb.exceptions(bs);
 
DevLong dl;
dpb >> dl;
 
if (dpb.has_failed() == true)
{
   bitset<DevicePipeBlob::numFlags> bs_err = dpb.state();
   if (dpb.test(DevicePipeBlob::isempty_flag) == true)
       .....
}

Returns: The error bit set.

References Tango::DevicePipeBlob::state().

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

pipe.h

Public Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ Pipe() [1/2]

◆ Pipe() [2/2]

Member Function Documentation

◆ exceptions() [1/2]

◆ exceptions() [2/2]

◆ get_data_elt_nb()

◆ get_desc()

◆ get_disp_level()

◆ get_label()

◆ get_lower_name()

◆ get_name()

◆ get_pipe_serial_model()

◆ get_root_blob_name()

◆ get_writable()

◆ has_failed()

◆ operator<<()

◆ reset_exceptions()

◆ set_data_elt_names()

◆ set_data_elt_nb()

◆ set_default_properties()

◆ set_exceptions()

◆ set_name()

◆ set_pipe_serial_model()

◆ set_root_blob_name()

◆ set_user_pipe_mutex()

◆ state()