FM / tbb

/usr/include/oneapi/tbb

Name	Size	Mode	Actions
detail/	-	0755	rm
blocked_range.h	6453	0644	edit dl rm
blocked_range2d.h	3369	0644	edit dl rm
blocked_range3d.h	4455	0644	edit dl rm
blocked_rangeNd.h	5508	0644	edit dl rm
cache_aligned_allocator.h	6905	0644	edit dl rm
collaborative_call_once.h	9053	0644	edit dl rm
combinable.h	1969	0644	edit dl rm
concurrent_hash_map.h	71893	0644	edit dl rm
concurrent_lru_cache.h	13737	0644	edit dl rm
concurrent_map.h	13416	0644	edit dl rm
concurrent_priority_queue.h	19531	0644	edit dl rm
concurrent_queue.h	24030	0644	edit dl rm
concurrent_set.h	10241	0644	edit dl rm
concurrent_unordered_map.h	18697	0644	edit dl rm
concurrent_unordered_set.h	14850	0644	edit dl rm
concurrent_vector.h	46199	0644	edit dl rm
enumerable_thread_specific.h	42403	0644	edit dl rm
flow_graph.h	128339	0644	edit dl rm
flow_graph_abstractions.h	1446	0644	edit dl rm
global_control.h	6139	0644	edit dl rm
info.h	4179	0644	edit dl rm
memory_pool.h	9973	0644	edit dl rm
mutex.h	2628	0644	edit dl rm
null_mutex.h	2149	0644	edit dl rm
null_rw_mutex.h	2514	0644	edit dl rm
parallel_for.h	23451	0644	edit dl rm
parallel_for_each.h	27064	0644	edit dl rm
parallel_invoke.h	7783	0644	edit dl rm
parallel_pipeline.h	5755	0644	edit dl rm
parallel_reduce.h	37078	0644	edit dl rm
parallel_scan.h	22810	0644	edit dl rm
parallel_sort.h	11114	0644	edit dl rm
partitioner.h	28500	0644	edit dl rm
profiling.h	10005	0644	edit dl rm
queuing_mutex.h	6391	0644	edit dl rm
queuing_rw_mutex.h	6631	0644	edit dl rm
rw_mutex.h	8150	0644	edit dl rm
scalable_allocator.h	11655	0644	edit dl rm
spin_mutex.h	3513	0644	edit dl rm
spin_rw_mutex.h	7839	0644	edit dl rm
task.h	1090	0644	edit dl rm
task_arena.h	17853	0644	edit dl rm
task_group.h	27329	0644	edit dl rm
task_scheduler_observer.h	4585	0644	edit dl rm
tbbmalloc_proxy.h	1907	0644	edit dl rm
tbb_allocator.h	3782	0644	edit dl rm
tick_count.h	3201	0644	edit dl rm
version.h	4007	0644	edit dl rm

Edit: /usr/include/oneapi/tbb/task_scheduler_observer.h (4585B)

/*
    Copyright (c) 2005-2021 Intel Corporation

Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
*/

#ifndef __TBB_task_scheduler_observer_H
#define __TBB_task_scheduler_observer_H

#include "detail/_namespace_injection.h"
#include "task_arena.h"
#include <atomic>

namespace tbb {
namespace detail {

namespace d1 {
class task_scheduler_observer;
}

namespace r1 {
class observer_proxy;
class observer_list;

//! Enable or disable observation
/** For local observers the method can be used only when the current thread
has the task scheduler initialized or is attached to an arena.
Repeated calls with the same state are no-ops. **/
TBB_EXPORT void __TBB_EXPORTED_FUNC observe(d1::task_scheduler_observer&, bool state = true);
}

namespace d1 {
class task_scheduler_observer {
    friend class r1::observer_proxy;
    friend class r1::observer_list;
    friend void r1::observe(d1::task_scheduler_observer&, bool);

//! Pointer to the proxy holding this observer.
    /** Observers are proxied by the scheduler to maintain persistent lists of them. **/
    std::atomic<r1::observer_proxy*> my_proxy{ nullptr };

//! Counter preventing the observer from being destroyed while in use by the scheduler.
    /** Valid only when observation is on. **/
    std::atomic<intptr_t> my_busy_count{ 0 };

//! Contains task_arena pointer
    task_arena* my_task_arena{ nullptr };
public:
    //! Returns true if observation is enabled, false otherwise.
    bool is_observing() const { return my_proxy.load(std::memory_order_relaxed) != nullptr; }

//! Entry notification
    /** Invoked from inside observe(true) call and whenever a worker enters the arena
        this observer is associated with. If a thread is already in the arena when
        the observer is activated, the entry notification is called before it
        executes the first stolen task. **/
    virtual void on_scheduler_entry( bool /*is_worker*/ ) {}

//! Exit notification
    /** Invoked from inside observe(false) call and whenever a worker leaves the
        arena this observer is associated with. **/
    virtual void on_scheduler_exit( bool /*is_worker*/ ) {}

//! Construct local or global observer in inactive state (observation disabled).
    /** For a local observer entry/exit notifications are invoked whenever a worker
        thread joins/leaves the arena of the observer's owner thread. If a thread is
        already in the arena when the observer is activated, the entry notification is
        called before it executes the first stolen task. **/
    explicit task_scheduler_observer() = default;

//! Construct local observer for a given arena in inactive state (observation disabled).
    /** entry/exit notifications are invoked whenever a thread joins/leaves arena.
        If a thread is already in the arena when the observer is activated, the entry notification
        is called before it executes the first stolen task. **/
    explicit task_scheduler_observer(task_arena& a) : my_task_arena(&a) {}

/** Destructor protects instance of the observer from concurrent notification.
       It is recommended to disable observation before destructor of a derived class starts,
       otherwise it can lead to concurrent notification callback on partly destroyed object **/
    virtual ~task_scheduler_observer() {
        if (my_proxy.load(std::memory_order_acquire)) {
            observe(false);
        }
    }

//! Enable or disable observation
    /** Warning: concurrent invocations of this method are not safe.
        Repeated calls with the same state are no-ops. **/
    void observe(bool state = true) {
        if( state && !my_proxy.load(std::memory_order_relaxed) ) {
            __TBB_ASSERT( my_busy_count.load(std::memory_order_relaxed) == 0, "Inconsistent state of task_scheduler_observer instance");
        }
        r1::observe(*this, state);
    }
};

} // namespace d1
} // namespace detail

inline namespace v1 {
    using detail::d1::task_scheduler_observer;
}
} // namespace tbb

#endif /* __TBB_task_scheduler_observer_H */

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