tbb::flow::interface10a::overwrite_node< T > Class Template Reference

#include <flow_graph.h>

Inheritance diagram for tbb::flow::interface10a::overwrite_node< T >:

Collaboration diagram for tbb::flow::interface10a::overwrite_node< T >:

Classes
struct	register_predecessor_task
	Breaks an infinite loop between the node reservation and register_successor call. More...

Public Types
typedef T	input_type
typedef T	output_type
typedef receiver< input_type >::predecessor_type	predecessor_type
typedef sender< output_type >::successor_type	successor_type
Public Types inherited from tbb::flow::interface10::receiver< T >
typedef T	input_type
	The input type of this receiver. More...
typedef internal::async_helpers< T >::filtered_type	filtered_type
Public Types inherited from tbb::flow::interface10::internal::untyped_receiver
typedef untyped_sender	predecessor_type
	The predecessor type for this node. More...
Public Types inherited from tbb::flow::interface10::sender< T >
typedef T	output_type
	The output type of this sender. More...
typedef internal::async_helpers< T >::filtered_type	filtered_type
Public Types inherited from tbb::flow::interface10::internal::untyped_sender
typedef untyped_receiver	successor_type
	The successor type for this node. More...

Public Member Functions
	overwrite_node (graph &g)
	overwrite_node (const overwrite_node &src)
	Copy constructor; doesn't take anything from src; default won't work. More...
	~overwrite_node ()
bool	register_successor (successor_type &s) __TBB_override
	Add a new successor to this node. More...
bool	remove_successor (successor_type &s) __TBB_override
	Removes a successor from this node. More...
bool	try_get (input_type &v) __TBB_override
	Request an item from the sender. More...
bool	try_reserve (T &v) __TBB_override
	Reserves an item. More...
bool	try_release () __TBB_override
	Releases the reserved item. More...
bool	try_consume () __TBB_override
	Consumes the reserved item. More...
bool	is_valid ()
void	clear ()
Public Member Functions inherited from tbb::flow::interface10::graph_node
	graph_node (graph &g)
virtual	~graph_node ()
Public Member Functions inherited from tbb::flow::interface10::receiver< T >
bool	try_put (const typename internal::async_helpers< T >::filtered_type &t)
	Put an item to the receiver. More...
bool	try_put (const typename internal::async_helpers< T >::async_type &t)
Public Member Functions inherited from tbb::flow::interface10::internal::untyped_receiver
virtual	~untyped_receiver ()
	Destructor. More...
template<typename X >
bool	try_put (const X &t)
	Put an item to the receiver. More...
virtual bool	register_predecessor (predecessor_type &)
	Add a predecessor to the node. More...
virtual bool	remove_predecessor (predecessor_type &)
	Remove a predecessor from the node. More...
Public Member Functions inherited from tbb::flow::interface10::internal::untyped_sender
virtual	~untyped_sender ()

Protected Member Functions
task *	try_put_task (const input_type &v) __TBB_override
	Put item to successor; return task to run the successor if possible. More...
task *	try_put_task_impl (const input_type &v)
graph &	graph_reference () __TBB_override
void	reset_receiver (reset_flags) __TBB_override
	put receiver back in initial state More...
void	reset_node (reset_flags f) __TBB_override
Protected Member Functions inherited from tbb::flow::interface10::receiver< T >
virtual task *	try_put_task_wrapper (const void *p, bool is_async) __TBB_override
Protected Member Functions inherited from tbb::flow::interface10::internal::untyped_receiver
template<typename X >
task *	try_put_task (const X &t)
virtual bool	is_continue_receiver ()
Protected Member Functions inherited from tbb::flow::interface10::sender< T >
virtual bool	try_get_wrapper (void *p, bool is_async) __TBB_override
virtual bool	try_reserve_wrapper (void *p, bool is_async) __TBB_override
Protected Member Functions inherited from tbb::flow::interface10::internal::untyped_sender
template<typename X >
bool	try_get (X &t)
	Request an item from the sender. More...
template<typename X >
bool	try_reserve (X &t)
	Reserves an item in the sender. More...

Protected Attributes
spin_mutex	my_mutex
internal::broadcast_cache< input_type, null_rw_mutex >	my_successors
input_type	my_buffer
bool	my_buffer_is_valid
Protected Attributes inherited from tbb::flow::interface10::graph_node
graph &	my_graph
graph_node *	next
graph_node *	prev

Friends
template<typename R , typename B >
class	run_and_put_task
template<typename X , typename Y >
class	internal::broadcast_cache
template<typename X , typename Y >
class	internal::round_robin_cache

Detailed Description

template<typename T>
class tbb::flow::interface10a::overwrite_node< T >

Definition at line 3634 of file flow_graph.h.

Member Typedef Documentation

input_type

template<typename T >

typedef T tbb::flow::interface10a::overwrite_node< T >::input_type

Definition at line 3636 of file flow_graph.h.

output_type

template<typename T >

typedef T tbb::flow::interface10a::overwrite_node< T >::output_type

Definition at line 3637 of file flow_graph.h.

predecessor_type

template<typename T >

typedef receiver<input_type>::predecessor_type tbb::flow::interface10a::overwrite_node< T >::predecessor_type

Definition at line 3638 of file flow_graph.h.

successor_type

template<typename T >

typedef sender<output_type>::successor_type tbb::flow::interface10a::overwrite_node< T >::successor_type

Definition at line 3639 of file flow_graph.h.

Constructor & Destructor Documentation

overwrite_node() [1/2]

template<typename T >

tbb::flow::interface10a::overwrite_node< T >::overwrite_node ( graph &  g )

inlineexplicit

Definition at line 3647 of file flow_graph.h.

                                      : graph_node(g), my_buffer_is_valid(false) {
        my_successors.set_owner( this );
        tbb::internal::fgt_node( tbb::internal::FLOW_OVERWRITE_NODE, &this->my_graph,
                                 static_cast<receiver<input_type> *>(this), static_cast<sender<output_type> *>(this) );
    }

References tbb::internal::fgt_node(), and tbb::flow::interface10::internal::successor_cache< T, M >::set_owner().

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overwrite_node() [2/2]

template<typename T >

tbb::flow::interface10a::overwrite_node< T >::overwrite_node ( const overwrite_node< T > &  src )

inline

Copy constructor; doesn't take anything from src; default won't work.

Definition at line 3654 of file flow_graph.h.

                                                :
        graph_node(src.my_graph), receiver<T>(), sender<T>(), my_buffer_is_valid(false)
    {
        my_successors.set_owner( this );
        tbb::internal::fgt_node( tbb::internal::FLOW_OVERWRITE_NODE, &this->my_graph,
                                 static_cast<receiver<input_type> *>(this), static_cast<sender<output_type> *>(this) );
    }

References tbb::internal::fgt_node(), and tbb::flow::interface10::internal::successor_cache< T, M >::set_owner().

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~overwrite_node()

template<typename T >

tbb::flow::interface10a::overwrite_node< T >::~overwrite_node ( )

inline

Definition at line 3662 of file flow_graph.h.

{}

Member Function Documentation

clear()

template<typename T >

void tbb::flow::interface10a::overwrite_node< T >::clear ( )

inline

Definition at line 3777 of file flow_graph.h.

                 {
       spin_mutex::scoped_lock l( my_mutex );
       my_buffer_is_valid = false;
    }

graph_reference()

template<typename T >

graph& tbb::flow::interface10a::overwrite_node< T >::graph_reference ( )

inlineprotectedvirtual

Implements tbb::flow::interface10::internal::untyped_receiver.

Definition at line 3800 of file flow_graph.h.

                                            {
        return my_graph;
    }

is_valid()

template<typename T >

bool tbb::flow::interface10a::overwrite_node< T >::is_valid ( )

inline

Definition at line 3772 of file flow_graph.h.

                    {
       spin_mutex::scoped_lock l( my_mutex );
       return my_buffer_is_valid;
    }

register_successor()

template<typename T >

bool tbb::flow::interface10a::overwrite_node< T >::register_successor ( successor_type &  r )

inlinevirtual

Add a new successor to this node.

Implements tbb::flow::interface10::internal::untyped_sender.

Definition at line 3670 of file flow_graph.h.

                                                               {
        spin_mutex::scoped_lock l( my_mutex );
        if (my_buffer_is_valid && internal::is_graph_active( my_graph )) {
            // We have a valid value that must be forwarded immediately.
            bool ret = s.try_put( my_buffer );
            if ( ret ) {
                // We add the successor that accepted our put
                my_successors.register_successor( s );
            } else {
                // In case of reservation a race between the moment of reservation and register_successor can appear,
                // because failed reserve does not mean that register_successor is not ready to put a message immediately.
                // We have some sort of infinite loop: reserving node tries to set pull state for the edge,
                // but overwrite_node tries to return push state back. That is why we have to break this loop with task creation.
                task *rtask = new ( task::allocate_additional_child_of( *( my_graph.root_task() ) ) )
                    register_predecessor_task( *this, s );
                internal::spawn_in_graph_arena( my_graph, *rtask );
            }
        } else {
            // No valid value yet, just add as successor
            my_successors.register_successor( s );
        }
        return true;
    }

References tbb::flow::interface10::internal::is_graph_active(), tbb::flow::interface10::internal::successor_cache< T, M >::register_successor(), s, and tbb::flow::interface10::internal::spawn_in_graph_arena().

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remove_successor()

template<typename T >

bool tbb::flow::interface10a::overwrite_node< T >::remove_successor ( successor_type &  r )

inlinevirtual

Removes a successor from this node.

Implements tbb::flow::interface10::internal::untyped_sender.

Definition at line 3694 of file flow_graph.h.

                                                              {
        spin_mutex::scoped_lock l( my_mutex );
        my_successors.remove_successor(s);
        return true;
    }

References tbb::flow::interface10::internal::successor_cache< T, M >::remove_successor(), and s.

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reset_node()

template<typename T >

void tbb::flow::interface10a::overwrite_node< T >::reset_node ( reset_flags  f )

inlineprotectedvirtual

Implements tbb::flow::interface10::graph_node.

Definition at line 3829 of file flow_graph.h.

                                                   {
        my_buffer_is_valid = false;
       if (f&rf_clear_edges) {
           my_successors.clear();
       }
    }

References tbb::flow::interface10::internal::successor_cache< T, M >::clear(), and tbb::flow::interface10::rf_clear_edges.

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reset_receiver()

template<typename T >

void tbb::flow::interface10a::overwrite_node< T >::reset_receiver ( reset_flags  f )

inlineprotectedvirtual

put receiver back in initial state

Implements tbb::flow::interface10::internal::untyped_receiver.

Definition at line 3827 of file flow_graph.h.

{}

try_consume()

template<typename T >

bool tbb::flow::interface10a::overwrite_node< T >::try_consume ( )

inlinevirtual

Consumes the reserved item.

Reimplemented from tbb::flow::interface10::internal::untyped_sender.

Definition at line 3770 of file flow_graph.h.

{ return true; }

try_get()

template<typename T >

bool tbb::flow::interface10a::overwrite_node< T >::try_get ( input_type &  )

inlinevirtual

Request an item from the sender.

Reimplemented from tbb::flow::interface10::sender< T >.

Definition at line 3752 of file flow_graph.h.

                                                 {
        spin_mutex::scoped_lock l( my_mutex );
        if ( my_buffer_is_valid ) {
            v = my_buffer;
            return true;
        }
        return false;
    }

try_put_task()

template<typename T >

task* tbb::flow::interface10a::overwrite_node< T >::try_put_task ( const input_type &  t )

inlineprotectedvirtual

Put item to successor; return task to run the successor if possible.

Implements tbb::flow::interface10::receiver< T >.

Reimplemented in tbb::flow::interface10a::write_once_node< T >.

Definition at line 3787 of file flow_graph.h.

                                                              {
        spin_mutex::scoped_lock l( my_mutex );
        return try_put_task_impl(v);
    }

References internal::successor_cache< T, M >::my_mutex.

try_put_task_impl()

template<typename T >

task* tbb::flow::interface10a::overwrite_node< T >::try_put_task_impl ( const input_type &  v )

inlineprotected

Definition at line 3792 of file flow_graph.h.

                                                  {
        my_buffer = v;
        my_buffer_is_valid = true;
        task * rtask = my_successors.try_put_task(v);
        if (!rtask) rtask = SUCCESSFULLY_ENQUEUED;
        return rtask;
    }

References internal::successor_cache< T, M >::my_successors, and tbb::flow::internal::SUCCESSFULLY_ENQUEUED.

try_release()

template<typename T >

bool tbb::flow::interface10a::overwrite_node< T >::try_release ( )

inlinevirtual

Releases the reserved item.

Reimplemented from tbb::flow::interface10::internal::untyped_sender.

Definition at line 3767 of file flow_graph.h.

{ return true; }

try_reserve()

template<typename T >

bool tbb::flow::interface10a::overwrite_node< T >::try_reserve ( T &  v )

inlinevirtual

Reserves an item.

Reimplemented from tbb::flow::interface10::sender< T >.

Definition at line 3762 of file flow_graph.h.

                                            {
        return try_get(v);
    }

Friends And Related Function Documentation

internal::broadcast_cache

template<typename T >

template<typename X , typename Y >

friend class internal::broadcast_cache

friend

Definition at line 3785 of file flow_graph.h.

internal::round_robin_cache

template<typename T >

template<typename X , typename Y >

friend class internal::round_robin_cache

friend

Definition at line 3786 of file flow_graph.h.

run_and_put_task

template<typename T >

template<typename R , typename B >

friend class run_and_put_task

friend

Definition at line 3784 of file flow_graph.h.

Member Data Documentation

my_buffer

template<typename T >

input_type tbb::flow::interface10a::overwrite_node< T >::my_buffer

protected

Definition at line 3825 of file flow_graph.h.

my_buffer_is_valid

template<typename T >

bool tbb::flow::interface10a::overwrite_node< T >::my_buffer_is_valid

protected

Definition at line 3826 of file flow_graph.h.

my_mutex

template<typename T >

spin_mutex tbb::flow::interface10a::overwrite_node< T >::my_mutex

protected

Definition at line 3820 of file flow_graph.h.

my_successors

template<typename T >

internal::broadcast_cache< input_type, null_rw_mutex > tbb::flow::interface10a::overwrite_node< T >::my_successors

protected

Definition at line 3821 of file flow_graph.h.

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

• flow_graph.h