ns3::QueueSize Class Reference

Class for representing queue sizes. More...

#include "queue-size.h"

Collaboration diagram for ns3::QueueSize:

Public Member Functions
	QueueSize ()
	QueueSize (QueueSizeUnit unit, uint32_t value)
	Integer constructor.
	QueueSize (std::string size)
	String constructor.
QueueSizeUnit	GetUnit () const
	Get the underlying unit.
uint32_t	GetValue () const
	Get the underlying value.
bool	operator!= (const QueueSize &rhs) const
bool	operator< (const QueueSize &rhs) const
bool	operator<= (const QueueSize &rhs) const
bool	operator== (const QueueSize &rhs) const
bool	operator> (const QueueSize &rhs) const
bool	operator>= (const QueueSize &rhs) const

Static Private Member Functions
static bool	DoParse (const std::string s, QueueSizeUnit *unit, uint32_t *value)
	Parse a string representing a QueueSize.

Private Attributes
QueueSizeUnit	m_unit
	unit
uint32_t	m_value
	queue size [bytes or packets]

Friends
std::istream &	operator>> (std::istream &is, QueueSize &size)
	Stream extraction operator.

Detailed Description

Class for representing queue sizes.

Allows for natural and familiar use of queue sizes. Allows construction from strings, natural sum e.g.:

QueueSize x("7kB");
Ptr<Packet> p = Create<Packet> (1000);
QueueSize y = x + p;    // 8kB

This class also supports the regular comparison operators <, >, <=, >=, ==, and !=

Queue size specifiers consist of

• A numeric value,
• An optional multiplier prefix and
• A unit.

Whitespace is allowed but not required between the numeric value and multiplier or unit.

Supported multiplier prefixes:

Prefix	Value
"k", "K"	1000
"Ki"	1024
"M"	1000000
"Mi"	1024 Ki

Supported unit strings:

Symbol	Meaning
"B"	8-bit bytes
"p"	packets

Examples:

• "56kB" = 56,000 bytes
• "128 kB" = 128,000 bytes
• "8KiB" = 8,192 bytes
• "1000p" = 1,000 packets

See also

attribute_QueueSize

Definition at line 84 of file queue-size.h.

Constructor & Destructor Documentation

QueueSize() [1/3]

ns3::QueueSize::QueueSize

(

)

Definition at line 102 of file queue-size.cc.

References NS_LOG_FUNCTION.

QueueSize() [2/3]

ns3::QueueSize::QueueSize	(	QueueSizeUnit	unit,
		uint32_t	value )

Integer constructor.

Construct a queue size from a mode and a value.

Parameters

unit	whether the value is expressed in terms of packets or bytes
value	the value

Definition at line 109 of file queue-size.cc.

References NS_LOG_FUNCTION.

QueueSize() [3/3]

ns3::QueueSize::QueueSize

(

std::string

size

)

String constructor.

Construct a queue size from a string. Many different unit strings are supported Supported unit strings: B, p
kB, KB, KiB, kp, Kp, Kip
MB, MiB, Mp, Mip
Examples: "56kB" = 56,000 bytes "128 kB" = 128,000 bytes "8KiB" = 8,192 bytes "1000p" = 1,000 packets

Parameters

size	string representing the size

Definition at line 178 of file queue-size.cc.

References DoParse(), m_unit, m_value, NS_ABORT_MSG_IF, and NS_LOG_FUNCTION.

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Member Function Documentation

DoParse()

bool ns3::QueueSize::DoParse ( const std::string s, QueueSizeUnit * unit, uint32_t * value )

staticprivate

Parse a string representing a QueueSize.

Allowed unit representations include all combinations of

• An SI prefix: k, K, M
• Bytes (8 bits) or packets

Parameters

[in]	s	The string representation, including unit
[in,out]	unit	The location to put the unit.
[in,out]	value	The location to put the value, in bytes or packets.

Returns

true if parsing was successful.

Definition at line 22 of file queue-size.cc.

References ns3::BYTES, NS_LOG_FUNCTION, and ns3::PACKETS.

Referenced by QueueSize().

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GetUnit()

QueueSizeUnit ns3::QueueSize::GetUnit

(

)

const

Get the underlying unit.

Returns

The underlying unit

Definition at line 165 of file queue-size.cc.

References m_unit, and NS_LOG_FUNCTION.

Referenced by ns3::QueueBase::GetCurrentSize(), ns3::RedQueueDisc::InitializeParams(), ns3::RedQueueDisc::ModifyP(), operator!=(), ns3::operator+(), ns3::operator+(), ns3::operator-(), ns3::operator-(), operator<(), ns3::operator<<(), operator<=(), operator==(), operator>(), operator>=(), ns3::QueueDisc::SetMaxSize(), and ns3::QueueBase::WouldOverflow().

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GetValue()

uint32_t ns3::QueueSize::GetValue

(

)

const

Get the underlying value.

Returns

The underlying value

Definition at line 172 of file queue-size.cc.

References m_value, and NS_LOG_FUNCTION.

Referenced by ns3::PieQueueDisc::DoEnqueue(), ns3::operator+(), ns3::operator+(), ns3::operator-(), ns3::operator-(), ns3::operator<<(), ns3::QueueBase::SetMaxSize(), ns3::QueueDisc::SetMaxSize(), and ns3::QueueBase::WouldOverflow().

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operator!=()

bool ns3::QueueSize::operator!=

(

const QueueSize &

rhs

)

const

Returns

true if this size is not equal to rhs

Parameters

rhs	the queue size to compare to this queue size

Definition at line 157 of file queue-size.cc.

References GetUnit(), m_unit, m_value, and NS_ABORT_MSG_IF.

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operator<()

bool ns3::QueueSize::operator<

(

const QueueSize &

rhs

)

const

Returns

true if this size is less than rhs

Parameters

rhs	the queue size to compare to this queue size

Definition at line 116 of file queue-size.cc.

References GetUnit(), m_unit, m_value, and NS_ABORT_MSG_IF.

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operator<=()

bool ns3::QueueSize::operator<=

(

const QueueSize &

rhs

)

const

Returns

true if this size is less than or equal to rhs

Parameters

rhs	the queue size to compare to this queue size

Definition at line 124 of file queue-size.cc.

References GetUnit(), m_unit, m_value, and NS_ABORT_MSG_IF.

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operator==()

bool ns3::QueueSize::operator==

(

const QueueSize &

rhs

)

const

Returns

true if this size is equal to rhs

Parameters

rhs	the queue size to compare to this queue size

Definition at line 149 of file queue-size.cc.

References GetUnit(), m_unit, m_value, and NS_ABORT_MSG_IF.

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operator>()

bool ns3::QueueSize::operator>

(

const QueueSize &

rhs

)

const

Returns

true if this size is greater than rhs

Parameters

rhs	the queue size to compare to this queue size

Definition at line 133 of file queue-size.cc.

References GetUnit(), m_unit, m_value, and NS_ABORT_MSG_IF.

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operator>=()

bool ns3::QueueSize::operator>=

(

const QueueSize &

rhs

)

const

Returns

true if this size is greater than or equal to rhs

Parameters

rhs	the queue size to compare to this queue size

Definition at line 141 of file queue-size.cc.

References GetUnit(), m_unit, m_value, and NS_ABORT_MSG_IF.

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Friends And Related Symbol Documentation

operator>>

std::istream & operator>> ( std::istream & is, QueueSize & size )

friend

Stream extraction operator.

Parameters

is	the stream
size	the queue size

Returns

a reference to the stream

Definition at line 195 of file queue-size.cc.

Member Data Documentation

m_unit

QueueSizeUnit ns3::QueueSize::m_unit

private

unit

Definition at line 188 of file queue-size.h.

Referenced by QueueSize(), GetUnit(), operator!=(), operator<(), operator<=(), operator==(), operator>(), and operator>=().

m_value

uint32_t ns3::QueueSize::m_value

private

queue size [bytes or packets]

Definition at line 189 of file queue-size.h.

Referenced by QueueSize(), GetValue(), operator!=(), operator<(), operator<=(), operator==(), operator>(), and operator>=().

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

• src/network/utils/queue-size.h
• src/network/utils/queue-size.cc