Import Geant4 10.7.0.beta source tree

source/externals/ptl/include/PTL/ThreadData.hh

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+//
+// MIT License
+// Copyright (c) 2020 Jonathan R. Madsen
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED
+// "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
+// LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+//  ---------------------------------------------------------------
+//  Tasking class header
+//  Class Description:
+//  ---------------------------------------------------------------
+//  Author: Jonathan Madsen
+//  ---------------------------------------------------------------
+
+#pragma once
+
+#include <cstddef>
+#include <cstdint>
+#include <deque>
+
+#if defined(PTL_USE_TBB)
+#    include <tbb/global_control.h>
+#    include <tbb/task_group.h>
+#    include <tbb/task_scheduler_init.h>
+#endif
+
+namespace PTL
+{
+//--------------------------------------------------------------------------------------//
+
+#if defined(PTL_USE_TBB)
+
+using tbb_global_control_t = ::tbb::global_control;
+using tbb_task_group_t     = ::tbb::task_group;
+#else
+
+namespace tbb
+{
+class task_group
+{
+public:
+    // dummy constructor
+    task_group() {}
+    // dummy wait
+    inline void wait() {}
+    // run function
+    template <typename _Func>
+    inline void run(_Func f)
+    {
+        f();
+    }
+    // run and wait
+    template <typename _Func>
+    inline void run_and_wait(_Func f)
+    {
+        f();
+    }
+};
+
+class global_control
+{
+public:
+    enum parameter
+    {
+        max_allowed_parallelism,
+        thread_stack_size
+    };
+
+    global_control(parameter p, size_t value);
+    ~global_control();
+    static size_t active_value(parameter param);
+};
+
+}  // namespace tbb
+
+using tbb_global_control_t = tbb::global_control;
+using tbb_task_group_t     = tbb::task_group;
+
+#endif
+
+//--------------------------------------------------------------------------------------//
+
+class ThreadPool;
+class VUserTaskQueue;
+
+//--------------------------------------------------------------------------------------//
+
+class ThreadData
+{
+public:
+    template <typename _Tp>
+    using TaskStack = std::deque<_Tp>;
+
+    ThreadData(ThreadPool* tp);
+    ~ThreadData();
+
+    void update();
+
+public:
+    bool                       is_master;
+    bool                       within_task;
+    intmax_t                   task_depth;
+    ThreadPool*                thread_pool;
+    VUserTaskQueue*            current_queue;
+    TaskStack<VUserTaskQueue*> queue_stack;
+
+public:
+    // Public functions
+    static ThreadData*& GetInstance();
+};
+
+//--------------------------------------------------------------------------------------//
+
+}  // namespace PTL