tasks_cpp: add function to query the task limit

tasks_cpp/include/embb/tasks/node.h

@@ -130,6 +130,15 @@ class Node {
   }
 
   /**
+    * Returns the number of available tasks.
+    * \return The number of available tasks
+    * \waitfree
+    */
+  mtapi_uint_t GetTaskLimit() const {
+    return task_limit_;
+  }
+
+  /**
     * Returns the number of available cores.
     * \return The number of available cores
     * \waitfree
@@ -229,6 +238,7 @@ class Node {
     mtapi_task_context_t * context);
 
   mtapi_uint_t queue_count_;
+  mtapi_uint_t task_limit_;
   mtapi_uint_t core_count_;
   mtapi_uint_t worker_thread_count_;
   mtapi_action_hndl_t action_handle_;

tasks_cpp/src/node.cc

@@ -78,6 +78,9 @@ Node::Node(
   mtapi_node_get_attribute(node_id, MTAPI_NODE_MAX_QUEUES, &queue_count_,
     sizeof(queue_count_), &status);
   assert(MTAPI_SUCCESS == status);
+  mtapi_node_get_attribute(node_id, MTAPI_NODE_MAX_TASKS, &task_limit_,
+    sizeof(queue_count_), &status);
+  assert(MTAPI_SUCCESS == status);
   core_count_ = info.hardware_concurrency;
   worker_thread_count_ = embb_core_set_count(&attr->core_affinity);
   action_handle_ = mtapi_action_create(TASKS_CPP_JOB, action_func,