SemaphoreNotifiableBlock Class Reference

A block of BarrierNotifiable objects, with a synchronous allocation call. More...

#include <SemaphoreNotifiableBlock.hxx>

Inheritance diagram for SemaphoreNotifiableBlock:

Public Member Functions
	SemaphoreNotifiableBlock (unsigned num_parallelism)
	constructor.
BarrierNotifiable *	acquire ()
	Gets a barrier notifiable.
void	notify () override
	Internal: notifies that a barrier has been returned.

Private Member Functions
	DISALLOW_COPY_AND_ASSIGN (SemaphoreNotifiableBlock)
Private Member Functions inherited from Atomic
void	lock ()
void	unlock ()

Private Attributes
unsigned	count_
	How many barriers did we allocate in total?
OSSem	sem_
	Semaphore holding free barriers.
BarrierNotifiable *	barriers_
	The raw pointer to the block of barriernotifiables.

Detailed Description

A block of BarrierNotifiable objects, with a synchronous allocation call.

Caller threads can block on allocating a new entry, and then get back a fresh BarrierNotifiable, which, upon being released will automatically be reallocated to a waiting thread, if any.

Definition at line 45 of file SemaphoreNotifiableBlock.hxx.

Constructor & Destructor Documentation

SemaphoreNotifiableBlock()

SemaphoreNotifiableBlock::SemaphoreNotifiableBlock ( unsigned  num_parallelism )

inline

constructor.

Parameters

num_parallelism

tells how many BarrierNotifiables we should have and hand out to threads requesting them.

Definition at line 50 of file SemaphoreNotifiableBlock.hxx.

~SemaphoreNotifiableBlock()

SemaphoreNotifiableBlock::~SemaphoreNotifiableBlock ( )

inline

Definition at line 57 of file SemaphoreNotifiableBlock.hxx.

Member Function Documentation

acquire()

BarrierNotifiable * SemaphoreNotifiableBlock::acquire ( )

inline

Gets a barrier notifiable.

May block the current thread if there isn't one ready.

Returns

a fresh BarrierNotifiable.

Definition at line 64 of file SemaphoreNotifiableBlock.hxx.

notify()

void SemaphoreNotifiableBlock::notify ( )

inlineoverridevirtual

Internal: notifies that a barrier has been returned.

Implements Notifiable.

Definition at line 76 of file SemaphoreNotifiableBlock.hxx.

Member Data Documentation

barriers_

BarrierNotifiable* SemaphoreNotifiableBlock::barriers_

private

The raw pointer to the block of barriernotifiables.

Definition at line 95 of file SemaphoreNotifiableBlock.hxx.

count_

unsigned SemaphoreNotifiableBlock::count_

private

How many barriers did we allocate in total?

Definition at line 91 of file SemaphoreNotifiableBlock.hxx.

sem_

OSSem SemaphoreNotifiableBlock::sem_

private

Semaphore holding free barriers.

Definition at line 93 of file SemaphoreNotifiableBlock.hxx.

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

• SemaphoreNotifiableBlock.hxx