Add a page with constraints helpers to the spec

Signed-off-by: Isaev, Ilya <ilya.isaev@intel.com>

Author: isaevil

source/elements/oneTBB/source/constrained_arena_helpers.rst

@@ -0,0 +1,37 @@
+.. SPDX-FileCopyrightText: 2025 Intel Corporation
+..
+.. SPDX-License-Identifier: CC-BY-4.0
+
+=========================
+Constrained Arena Helpers
+=========================
+**[constrained_arena_helpers]**
+
+Helper interfaces to create and manage multiple ``task_arena`` objects with constraints.
+
+.. code:: cpp
+
+    // Defined in header <oneapi/tbb/task_arena.h>
+
+    namespace oneapi {
+    namespace tbb {
+        std::vector<oneapi::tbb::task_arena> create_numa_task_arenas(
+            oneapi::tbb::task_arena::constraints other_constraints = {},
+            unsigned reserved_slots = 0);
+    } // namespace tbb
+    } // namespace oneapi
+
+Functions
+---------
+
+.. cpp:function:: std::vector<oneapi::tbb::task_arena> create_numa_task_arenas(oneapi::tbb::task_arena::constraints other_constraints = {}, unsigned reserved_slots = 0)
+
+    Returns a ``std::vector`` of ``task_arena`` objects, each bound to a separate NUMA node.
+    The number of created ``task_arena`` is equal to the number of NUMA nodes available on the system.
+    It optionally takes additional ``other_constraints`` argument to be applied to each created
+    ``task_arena``, ignoring ``numa_id`` value. The second optional ``reserved_slots`` argument
+    allows to reserve a number of slots in each created ``task_arena`` for application threads.
+
+    .. note::
+        If error occurs during system topology parsing, returns ``std::vector`` containing single
+        ``task_arena`` object equivalent to ``task_arena(other_constraints, reserved_slots)``.

source/elements/oneTBB/source/nested-aux-interfaces.rst

@@ -1,4 +1,4 @@
-.. SPDX-FileCopyrightText: 2019-2020 Intel Corporation
+.. SPDX-FileCopyrightText: 2019-2025 Intel Corporation
 ..
 .. SPDX-License-Identifier: CC-BY-4.0
 
@@ -9,6 +9,7 @@
 .. toctree::
    :maxdepth: 2
 
+   constrained_arena_helpers.rst
    memory_allocation.rst
    mutual_exclusion.rst
    timing.rst