Intel(R) Threading Building Blocks Doxygen Documentation  version 4.2.3
tbb::flow::interface10::graph Class Reference

The graph class. More...

#include <_flow_graph_impl.h>

Inheritance diagram for tbb::flow::interface10::graph:
Collaboration diagram for tbb::flow::interface10::graph:

Classes

class  run_and_put_task
 
class  run_task
 
class  spawn_functor
 A functor that spawns a task. More...
 
class  wait_functor
 

Public Types

typedef tbb::flow::interface11::graph_iterator< graph, tbb::flow::interface11::graph_nodeiterator
 
typedef tbb::flow::interface11::graph_iterator< const graph, const tbb::flow::interface11::graph_nodeconst_iterator
 

Public Member Functions

 graph ()
 Constructs a graph with isolated task_group_context. More...
 
 graph (tbb::task_group_context &use_this_context)
 Constructs a graph with use_this_context as context. More...
 
 ~graph ()
 Destroys the graph. More...
 
void increment_wait_count ()
 
void decrement_wait_count ()
 
void reserve_wait () __TBB_override
 Used to register that an external entity may still interact with the graph. More...
 
void release_wait () __TBB_override
 Deregisters an external entity that may have interacted with the graph. More...
 
template<typename Receiver , typename Body >
void run (Receiver &r, Body body)
 Spawns a task that runs a body and puts its output to a specific receiver. More...
 
template<typename Body >
void run (Body body)
 Spawns a task that runs a function object. More...
 
void wait_for_all ()
 Wait until graph is idle and decrement_wait_count calls equals increment_wait_count calls. More...
 
tbb::taskroot_task ()
 Returns the root task of the graph. More...
 
iterator begin ()
 start iterator More...
 
iterator end ()
 end iterator More...
 
const_iterator begin () const
 start const iterator More...
 
const_iterator end () const
 end const iterator More...
 
const_iterator cbegin () const
 start const iterator More...
 
const_iterator cend () const
 end const iterator More...
 
bool is_cancelled ()
 return status of graph execution More...
 
bool exception_thrown ()
 
void reset (tbb::flow::interface11::reset_flags f=tbb::flow::interface11::rf_reset_protocol)
 
- Public Member Functions inherited from tbb::flow::interface11::graph_proxy
virtual ~graph_proxy ()
 

Private Types

typedef std::list< tbb::task * > task_list_type
 

Private Member Functions

void prepare_task_arena (bool reinit=false)
 
void register_node (tbb::flow::interface11::graph_node *n)
 
void remove_node (tbb::flow::interface11::graph_node *n)
 
- Private Member Functions inherited from tbb::internal::no_copy
 no_copy (const no_copy &)=delete
 
 no_copy ()=default
 

Private Attributes

tbb::taskmy_root_task
 
tbb::task_group_contextmy_context
 
bool own_context
 
bool cancelled
 
bool caught_exception
 
bool my_is_active
 
task_list_type my_reset_task_list
 
tbb::flow::interface11::graph_nodemy_nodes
 
tbb::flow::interface11::graph_nodemy_nodes_last
 
tbb::spin_mutex nodelist_mutex
 
tbb::task_arenamy_task_arena
 
tbb::flow::interface11::internal::graph_task_priority_queue_t my_priority_queue
 

Friends

class tbb::flow::interface11::graph_node
 
template<typename C , typename N >
class tbb::flow::interface11::graph_iterator
 
class tbb::interface7::internal::task_arena_base
 
void tbb::flow::interface11::internal::activate_graph (graph &g)
 
void tbb::flow::interface11::internal::deactivate_graph (graph &g)
 
bool tbb::flow::interface11::internal::is_graph_active (graph &g)
 
tbb::tasktbb::flow::interface11::internal::prioritize_task (graph &g, tbb::task &arena_task)
 
void tbb::flow::interface11::internal::spawn_in_graph_arena (graph &g, tbb::task &arena_task)
 
void tbb::flow::interface11::internal::enqueue_in_graph_arena (graph &g, tbb::task &arena_task)
 
void tbb::flow::interface11::internal::add_task_to_graph_reset_list (graph &g, tbb::task *tp)
 

Detailed Description

The graph class.

This class serves as a handle to the graph

Definition at line 211 of file _flow_graph_impl.h.

Member Typedef Documentation

◆ const_iterator

◆ iterator

◆ task_list_type

Definition at line 246 of file _flow_graph_impl.h.

Constructor & Destructor Documentation

◆ graph() [1/2]

tbb::flow::interface10::graph::graph ( )
inline

Constructs a graph with isolated task_group_context.

Definition at line 766 of file flow_graph.h.

766  : my_nodes(NULL), my_nodes_last(NULL), my_task_arena(NULL) {
768  own_context = true;
769  cancelled = false;
770  caught_exception = false;
771  my_context = new task_group_context(tbb::internal::FLOW_TASKS);
772  my_root_task = (new (task::allocate_root(*my_context)) empty_task);
775  my_is_active = true;
776 }
static void fgt_graph(void *)
tbb::flow::interface11::graph_node * my_nodes_last
tbb::flow::interface11::graph_node * my_nodes
void set_ref_count(int count)
Set reference count.
Definition: task.h:750
void prepare_task_arena(bool reinit=false)
static internal::allocate_root_proxy allocate_root()
Returns proxy for overloaded new that allocates a root task.
Definition: task.h:652
tbb::task_group_context * my_context

References cancelled, caught_exception, own_context, and prepare_task_arena().

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◆ graph() [2/2]

tbb::flow::interface10::graph::graph ( tbb::task_group_context use_this_context)
inlineexplicit

Constructs a graph with use_this_context as context.

Definition at line 778 of file flow_graph.h.

778  :
779  my_context(&use_this_context), my_nodes(NULL), my_nodes_last(NULL), my_task_arena(NULL) {
781  own_context = false;
782  cancelled = false;
783  caught_exception = false;
784  my_root_task = (new (task::allocate_root(*my_context)) empty_task);
787  my_is_active = true;
788 }
static void fgt_graph(void *)
tbb::flow::interface11::graph_node * my_nodes_last
tbb::flow::interface11::graph_node * my_nodes
void set_ref_count(int count)
Set reference count.
Definition: task.h:750
void prepare_task_arena(bool reinit=false)
static internal::allocate_root_proxy allocate_root()
Returns proxy for overloaded new that allocates a root task.
Definition: task.h:652
tbb::task_group_context * my_context

References prepare_task_arena().

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◆ ~graph()

tbb::flow::interface10::graph::~graph ( )
inline

Destroys the graph.

Calls wait_for_all, then destroys the root task and context.

Definition at line 790 of file flow_graph.h.

790  {
791  wait_for_all();
793  tbb::task::destroy(*my_root_task);
794  if (own_context) delete my_context;
795  delete my_task_arena;
796 }
void wait_for_all()
Wait until graph is idle and decrement_wait_count calls equals increment_wait_count calls.
void set_ref_count(int count)
Set reference count.
Definition: task.h:750
tbb::task_group_context * my_context

References wait_for_all().

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Member Function Documentation

◆ begin() [1/2]

graph::iterator tbb::flow::interface10::graph::begin ( )
inline

start iterator

Definition at line 858 of file flow_graph.h.

858 { return iterator(this, true); }
tbb::flow::interface11::graph_iterator< graph, tbb::flow::interface11::graph_node > iterator

Referenced by tbb::flow::interface11::internal::key_matching_port< TraitsType >::reset_port().

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◆ begin() [2/2]

graph::const_iterator tbb::flow::interface10::graph::begin ( ) const
inline

start const iterator

Definition at line 862 of file flow_graph.h.

862 { return const_iterator(this, true); }
tbb::flow::interface11::graph_iterator< const graph, const tbb::flow::interface11::graph_node > const_iterator

◆ cbegin()

graph::const_iterator tbb::flow::interface10::graph::cbegin ( ) const
inline

start const iterator

Definition at line 866 of file flow_graph.h.

866 { return const_iterator(this, true); }
tbb::flow::interface11::graph_iterator< const graph, const tbb::flow::interface11::graph_node > const_iterator

◆ cend()

graph::const_iterator tbb::flow::interface10::graph::cend ( ) const
inline

end const iterator

Definition at line 868 of file flow_graph.h.

868 { return const_iterator(this, false); }
tbb::flow::interface11::graph_iterator< const graph, const tbb::flow::interface11::graph_node > const_iterator

◆ decrement_wait_count()

void tbb::flow::interface10::graph::decrement_wait_count ( )
inline

Definition at line 299 of file _flow_graph_impl.h.

299  {
300  release_wait();
301  }
void release_wait() __TBB_override
Deregisters an external entity that may have interacted with the graph.
Definition: flow_graph.h:805

References release_wait().

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◆ end() [1/2]

graph::iterator tbb::flow::interface10::graph::end ( )
inline

end iterator

Definition at line 860 of file flow_graph.h.

860 { return iterator(this, false); }
tbb::flow::interface11::graph_iterator< graph, tbb::flow::interface11::graph_node > iterator

Referenced by tbb::flow::interface11::internal::key_matching_port< TraitsType >::reset_port().

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◆ end() [2/2]

graph::const_iterator tbb::flow::interface10::graph::end ( ) const
inline

end const iterator

Definition at line 864 of file flow_graph.h.

864 { return const_iterator(this, false); }
tbb::flow::interface11::graph_iterator< const graph, const tbb::flow::interface11::graph_node > const_iterator

◆ exception_thrown()

bool tbb::flow::interface10::graph::exception_thrown ( )
inline

Definition at line 402 of file _flow_graph_impl.h.

References caught_exception.

◆ increment_wait_count()

void tbb::flow::interface10::graph::increment_wait_count ( )
inline

Definition at line 295 of file _flow_graph_impl.h.

295  {
296  reserve_wait();
297  }
void reserve_wait() __TBB_override
Used to register that an external entity may still interact with the graph.
Definition: flow_graph.h:798

References reserve_wait().

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◆ is_cancelled()

bool tbb::flow::interface10::graph::is_cancelled ( )
inline

return status of graph execution

Definition at line 401 of file _flow_graph_impl.h.

References cancelled.

◆ prepare_task_arena()

void tbb::flow::interface10::graph::prepare_task_arena ( bool  reinit = false)
inlineprivate

Definition at line 265 of file _flow_graph_impl.h.

265  {
266  if (reinit) {
267  __TBB_ASSERT(my_task_arena, "task arena is NULL");
270  }
271  else {
272  __TBB_ASSERT(my_task_arena == NULL, "task arena is not NULL");
274  }
275  if (!my_task_arena->is_active()) // failed to attach
276  my_task_arena->initialize(); // create a new, default-initialized arena
277  __TBB_ASSERT(my_task_arena->is_active(), "task arena is not active");
278  }
Tag class used to indicate the "attaching" constructor.
Definition: task_arena.h:299
#define __TBB_ASSERT(predicate, comment)
No-op version of __TBB_ASSERT.
Definition: tbb_stddef.h:165
void initialize()
Forces allocation of the resources for the task_arena as specified in constructor arguments.
Definition: task_arena.h:310

References __TBB_ASSERT, tbb::interface7::task_arena::initialize(), tbb::interface7::task_arena::is_active(), my_task_arena, and tbb::interface7::task_arena::terminate().

Referenced by graph().

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◆ register_node()

void tbb::flow::interface10::graph::register_node ( tbb::flow::interface11::graph_node n)
inlineprivate

Definition at line 812 of file flow_graph.h.

812  {
813  n->next = NULL;
814  {
816  n->prev = my_nodes_last;
817  if (my_nodes_last) my_nodes_last->next = n;
818  my_nodes_last = n;
819  if (!my_nodes) my_nodes = n;
820  }
821 }
tbb::flow::interface11::graph_node * my_nodes_last
tbb::flow::interface11::graph_node * my_nodes
void const char const char int ITT_FORMAT __itt_group_sync x void const char ITT_FORMAT __itt_group_sync s void ITT_FORMAT __itt_group_sync p void ITT_FORMAT p void ITT_FORMAT p no args __itt_suppress_mode_t unsigned int void size_t ITT_FORMAT d void ITT_FORMAT p void ITT_FORMAT p __itt_model_site __itt_model_site_instance ITT_FORMAT p __itt_model_task __itt_model_task_instance ITT_FORMAT p void * lock
friend class scoped_lock
Definition: spin_mutex.h:179

References tbb::flow::interface11::graph_node::next.

Referenced by tbb::flow::interface11::graph_node::graph_node().

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◆ release_wait()

void tbb::flow::interface10::graph::release_wait ( )
inlinevirtual

Deregisters an external entity that may have interacted with the graph.

The graph will not return from wait_for_all until all the number of decrement_wait_count calls matches the number of increment_wait_count calls.

Implements tbb::flow::interface11::graph_proxy.

Definition at line 805 of file flow_graph.h.

805  {
806  if (my_root_task) {
809  }
810 }
int decrement_ref_count()
Atomically decrement reference count and returns its new value.
Definition: task.h:777
static void fgt_release_wait(void *)

References tbb::internal::fgt_release_wait(), and my_root_task.

Referenced by decrement_wait_count().

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◆ remove_node()

void tbb::flow::interface10::graph::remove_node ( tbb::flow::interface11::graph_node n)
inlineprivate

Definition at line 823 of file flow_graph.h.

823  {
824  {
826  __TBB_ASSERT(my_nodes && my_nodes_last, "graph::remove_node: Error: no registered nodes");
827  if (n->prev) n->prev->next = n->next;
828  if (n->next) n->next->prev = n->prev;
829  if (my_nodes_last == n) my_nodes_last = n->prev;
830  if (my_nodes == n) my_nodes = n->next;
831  }
832  n->prev = n->next = NULL;
833 }
tbb::flow::interface11::graph_node * my_nodes_last
tbb::flow::interface11::graph_node * my_nodes
#define __TBB_ASSERT(predicate, comment)
No-op version of __TBB_ASSERT.
Definition: tbb_stddef.h:165
void const char const char int ITT_FORMAT __itt_group_sync x void const char ITT_FORMAT __itt_group_sync s void ITT_FORMAT __itt_group_sync p void ITT_FORMAT p void ITT_FORMAT p no args __itt_suppress_mode_t unsigned int void size_t ITT_FORMAT d void ITT_FORMAT p void ITT_FORMAT p __itt_model_site __itt_model_site_instance ITT_FORMAT p __itt_model_task __itt_model_task_instance ITT_FORMAT p void * lock
friend class scoped_lock
Definition: spin_mutex.h:179

References lock, and nodelist_mutex.

Referenced by tbb::flow::interface11::graph_node::~graph_node().

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◆ reserve_wait()

void tbb::flow::interface10::graph::reserve_wait ( )
inlinevirtual

Used to register that an external entity may still interact with the graph.

The graph will not return from wait_for_all until a matching number of decrement_wait_count calls is made.

Implements tbb::flow::interface11::graph_proxy.

Definition at line 798 of file flow_graph.h.

798  {
799  if (my_root_task) {
802  }
803 }
void increment_ref_count()
Atomically increment reference count.
Definition: task.h:760
static void fgt_reserve_wait(void *)

References tbb::internal::fgt_reserve_wait(), tbb::task::increment_ref_count(), and my_root_task.

Referenced by increment_wait_count().

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◆ reset()

void tbb::flow::interface10::graph::reset ( tbb::flow::interface11::reset_flags  f = tbb::flow::interface11::rf_reset_protocol)
inline

Definition at line 835 of file flow_graph.h.

835  {
836  // reset context
838 
839  if(my_context) my_context->reset();
840  cancelled = false;
841  caught_exception = false;
842  // reset all the nodes comprising the graph
843  for(iterator ii = begin(); ii != end(); ++ii) {
844  tbb::flow::interface11::graph_node *my_p = &(*ii);
845  my_p->reset_node(f);
846  }
847  // Reattach the arena. Might be useful to run the graph in a particular task_arena
848  // while not limiting graph lifetime to a single task_arena::execute() call.
849  prepare_task_arena( /*reinit=*/true );
851  // now spawn the tasks necessary to start the graph
852  for(task_list_type::iterator rti = my_reset_task_list.begin(); rti != my_reset_task_list.end(); ++rti) {
854  }
855  my_reset_task_list.clear();
856 }
iterator end()
end iterator
Definition: flow_graph.h:860
virtual void reset_node(reset_flags f=rf_reset_protocol)=0
The base of all graph nodes.
iterator begin()
start iterator
Definition: flow_graph.h:858
void __TBB_EXPORTED_METHOD reset()
Forcefully reinitializes the context after the task tree it was associated with is completed.
void prepare_task_arena(bool reinit=false)
tbb::flow::interface11::graph_iterator< graph, tbb::flow::interface11::graph_node > iterator
void deactivate_graph(tbb::flow::interface10::graph &g)
void activate_graph(tbb::flow::interface10::graph &g)
tbb::task_group_context * my_context
void spawn_in_graph_arena(tbb::flow::interface10::graph &g, tbb::task &arena_task)
Spawns a task inside graph arena.

◆ root_task()

tbb::task* tbb::flow::interface10::graph::root_task ( )
inline

◆ run() [1/2]

template<typename Receiver , typename Body >
void tbb::flow::interface10::graph::run ( Receiver &  r,
Body  body 
)
inline

Spawns a task that runs a body and puts its output to a specific receiver.

The task is spawned as a child of the graph. This is useful for running tasks that need to block a wait_for_all() on the graph. For example a one-off source.

Definition at line 317 of file _flow_graph_impl.h.

317  {
319  task* rtask = new (task::allocate_additional_child_of(*root_task()))
320  run_and_put_task< Receiver, Body >(r, body);
321  my_task_arena->execute(spawn_functor(*rtask));
322  }
323  }
bool is_graph_active(tbb::flow::interface10::graph &g)
internal::return_type_or_void< F >::type execute(F &f)
Definition: task_arena.h:418
void const char const char int ITT_FORMAT __itt_group_sync x void const char ITT_FORMAT __itt_group_sync s void ITT_FORMAT __itt_group_sync p void ITT_FORMAT p void ITT_FORMAT p no args __itt_suppress_mode_t unsigned int void size_t ITT_FORMAT d void ITT_FORMAT p void ITT_FORMAT p __itt_model_site __itt_model_site_instance ITT_FORMAT p __itt_model_task * task
tbb::task * root_task()
Returns the root task of the graph.

References tbb::interface7::task_arena::execute(), tbb::flow::interface11::internal::is_graph_active(), my_task_arena, and root_task().

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◆ run() [2/2]

template<typename Body >
void tbb::flow::interface10::graph::run ( Body  body)
inline

Spawns a task that runs a function object.

The task is spawned as a child of the graph. This is useful for running tasks that need to block a wait_for_all() on the graph. For example a one-off source.

Definition at line 329 of file _flow_graph_impl.h.

329  {
331  task* rtask = new (task::allocate_additional_child_of(*root_task())) run_task< Body >(body);
332  my_task_arena->execute(spawn_functor(*rtask));
333  }
334  }
bool is_graph_active(tbb::flow::interface10::graph &g)
internal::return_type_or_void< F >::type execute(F &f)
Definition: task_arena.h:418
void const char const char int ITT_FORMAT __itt_group_sync x void const char ITT_FORMAT __itt_group_sync s void ITT_FORMAT __itt_group_sync p void ITT_FORMAT p void ITT_FORMAT p no args __itt_suppress_mode_t unsigned int void size_t ITT_FORMAT d void ITT_FORMAT p void ITT_FORMAT p __itt_model_site __itt_model_site_instance ITT_FORMAT p __itt_model_task * task
tbb::task * root_task()
Returns the root task of the graph.

References tbb::interface7::task_arena::execute(), tbb::flow::interface11::internal::is_graph_active(), my_task_arena, and root_task().

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◆ wait_for_all()

void tbb::flow::interface10::graph::wait_for_all ( )
inline

Wait until graph is idle and decrement_wait_count calls equals increment_wait_count calls.

The waiting thread will go off and steal work while it is block in the wait_for_all.

Definition at line 338 of file _flow_graph_impl.h.

338  {
339  cancelled = false;
340  caught_exception = false;
341  if (my_root_task) {
342 #if TBB_USE_EXCEPTIONS
343  try {
344 #endif
345  my_task_arena->execute(wait_functor(my_root_task));
346 #if __TBB_TASK_GROUP_CONTEXT
348 #endif
349 #if TBB_USE_EXCEPTIONS
350  }
351  catch (...) {
353  my_context->reset();
354  caught_exception = true;
355  cancelled = true;
356  throw;
357  }
358 #endif
359 #if __TBB_TASK_GROUP_CONTEXT
360  // TODO: the "if" condition below is just a work-around to support the concurrent wait
361  // mode. The cancellation and exception mechanisms are still broken in this mode.
362  // Consider using task group not to re-implement the same functionality.
364  my_context->reset(); // consistent with behavior in catch()
365 #endif
367 #if __TBB_TASK_GROUP_CONTEXT
368  }
369 #endif
370  }
371  }
bool __TBB_EXPORTED_METHOD is_group_execution_cancelled() const
Returns true if the context received cancellation request.
uintptr_t traits() const
Returns the context's trait.
Definition: task.h:567
void __TBB_EXPORTED_METHOD reset()
Forcefully reinitializes the context after the task tree it was associated with is completed.
void set_ref_count(int count)
Set reference count.
Definition: task.h:750
internal::return_type_or_void< F >::type execute(F &f)
Definition: task_arena.h:418
tbb::task_group_context * my_context

References cancelled, caught_exception, tbb::task_group_context::concurrent_wait, tbb::interface7::task_arena::execute(), tbb::task_group_context::is_group_execution_cancelled(), my_context, my_root_task, my_task_arena, tbb::task_group_context::reset(), tbb::task::set_ref_count(), and tbb::task_group_context::traits().

Referenced by ~graph().

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Friends And Related Function Documentation

◆ tbb::flow::interface11::graph_iterator

template<typename C , typename N >
friend class tbb::flow::interface11::graph_iterator
friend

Definition at line 380 of file _flow_graph_impl.h.

◆ tbb::flow::interface11::graph_node

Definition at line 212 of file _flow_graph_impl.h.

◆ tbb::flow::interface11::internal::activate_graph

◆ tbb::flow::interface11::internal::add_task_to_graph_reset_list

◆ tbb::flow::interface11::internal::deactivate_graph

◆ tbb::flow::interface11::internal::enqueue_in_graph_arena

◆ tbb::flow::interface11::internal::is_graph_active

◆ tbb::flow::interface11::internal::prioritize_task

◆ tbb::flow::interface11::internal::spawn_in_graph_arena

◆ tbb::interface7::internal::task_arena_base

Definition at line 438 of file _flow_graph_impl.h.

Member Data Documentation

◆ cancelled

bool tbb::flow::interface10::graph::cancelled
private

◆ caught_exception

bool tbb::flow::interface10::graph::caught_exception
private

◆ my_context

tbb::task_group_context* tbb::flow::interface10::graph::my_context
private

◆ my_is_active

◆ my_nodes

tbb::flow::interface11::graph_node* tbb::flow::interface10::graph::my_nodes
private

Definition at line 418 of file _flow_graph_impl.h.

◆ my_nodes_last

tbb::flow::interface11::graph_node * tbb::flow::interface10::graph::my_nodes_last
private

Definition at line 418 of file _flow_graph_impl.h.

◆ my_priority_queue

tbb::flow::interface11::internal::graph_task_priority_queue_t tbb::flow::interface10::graph::my_priority_queue
private

◆ my_reset_task_list

task_list_type tbb::flow::interface10::graph::my_reset_task_list
private

◆ my_root_task

tbb::task* tbb::flow::interface10::graph::my_root_task
private

Definition at line 408 of file _flow_graph_impl.h.

Referenced by release_wait(), reserve_wait(), root_task(), and wait_for_all().

◆ my_task_arena

◆ nodelist_mutex

tbb::spin_mutex tbb::flow::interface10::graph::nodelist_mutex
private

Definition at line 420 of file _flow_graph_impl.h.

Referenced by remove_node().

◆ own_context

bool tbb::flow::interface10::graph::own_context
private

Definition at line 412 of file _flow_graph_impl.h.

Referenced by graph().


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

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