tbb::interface6::task_arena Class Reference

#include <task_arena.h>

List of all members.

Public Member Functions
	task_arena (int max_concurrency=automatic, unsigned reserved_for_masters=1)
	Creates task_arena with certain concurrency limits.
	task_arena (const task_arena &s)
	Copies settings from another task_arena.
void	initialize ()
void	initialize (int max_concurrency, unsigned reserved_for_masters=1)
	Overrides concurrency level and forces initialization of internal representation.
void	terminate ()
	~task_arena ()
bool	is_active () const
template<typename F>
void	enqueue (const F &f)
template<typename F>
void	enqueue (const F &f, priority_t p)
template<typename F>
void	execute (F &f)
template<typename F>
void	execute (const F &f)
void	wait_until_empty ()
Static Public Member Functions
static int __TBB_EXPORTED_FUNC	current_slot ()
	Returns the index, aka slot number, of the calling thread in its current arena.
Static Public Attributes
static const int	automatic = -1
	Typedef for number of threads that is automatic.
Friends
class	internal::task_scheduler_observer_v3

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Detailed Description

1-to-1 proxy representation class of scheduler's arena Constructors set up settings only, real construction is deferred till the first method invocation TODO: A side effect of this is that it's impossible to create a const task_arena object. Rethink? Destructor only removes one of the references to the inner arena representation. Final destruction happens when all the references (and the work) are gone.

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Constructor & Destructor Documentation

tbb::interface6::task_arena::task_arena	(	int	max_concurrency = automatic,
		unsigned	reserved_for_masters = 1
	)			[inline]

Creates task_arena with certain concurrency limits.

• max_concurrency specifies total number of slots in arena where threads work
• reserved_for_masters specifies number of slots to be used by master threads only. Value of 1 is default and reflects behavior of implicit arenas.

tbb::interface6::task_arena::~task_arena

(

)

[inline]

Removes the reference to the internal arena representation, and destroys the external object. Not thread safe wrt concurrent invocations of other methods.

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Member Function Documentation

template<typename F>

void tbb::interface6::task_arena::enqueue	(	const F &	f,
		priority_t	p
	)			[inline]

Enqueues a task with priority p into the arena to process a functor f, and immediately returns. Does not require the calling thread to join the arena

template<typename F>

void tbb::interface6::task_arena::enqueue

(

const F &

f

)

[inline]

Enqueues a task into the arena to process a functor, and immediately returns. Does not require the calling thread to join the arena

template<typename F>

void tbb::interface6::task_arena::execute

(

const F &

f

)

[inline]

Joins the arena and executes a functor, then returns If not possible to join, wraps the functor into a task, enqueues it and waits for task completion Can decrement the arena demand for workers, causing a worker to leave and free a slot to the calling thread

template<typename F>

void tbb::interface6::task_arena::execute

(

F &

f

)

[inline]

Joins the arena and executes a functor, then returns If not possible to join, wraps the functor into a task, enqueues it and waits for task completion Can decrement the arena demand for workers, causing a worker to leave and free a slot to the calling thread

bool tbb::interface6::task_arena::is_active

(

)

const [inline]

Returns true if the arena is active (initialized); false otherwise. The name was chosen to match a task_scheduler_init method with the same semantics.

void tbb::interface6::task_arena::terminate

(

)

[inline]

Removes the reference to the internal arena representation. Not thread safe wrt concurrent invocations of other methods.

void tbb::interface6::task_arena::wait_until_empty

(

)

[inline]

Wait for all work in the arena to be completed Even submitted by other application threads Joins arena if/when possible (in the same way as execute())

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

• task_arena.h

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