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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 "PTL/Config.hh"
#include <cstddef>
#include <cstdint>
#include <deque>
#include <thread>
#if defined(PTL_USE_TBB)
# if !defined(TBB_PREVIEW_GLOBAL_CONTROL)
# define TBB_PREVIEW_GLOBAL_CONTROL 1
# endif
# include <tbb/global_control.h>
# include <tbb/task_arena.h>
# include <tbb/task_group.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;
using tbb_task_arena_t = ::tbb::task_arena;
#else
namespace tbb
{
class task_group
{
public:
// dummy constructor
task_group() {}
// dummy wait
inline void wait() {}
// run function
template <typename FuncT>
inline void run(FuncT f)
{
f();
}
// run and wait
template <typename FuncT>
inline void run_and_wait(FuncT 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);
};
class task_arena
{
public:
enum parameter
{
not_initialized = -2,
automatic = -1
};
task_arena(int max_concurrency = automatic, unsigned reserved_for_masters = 1)
{
(void) max_concurrency;
(void) reserved_for_masters;
}
~task_arena() = default;
void initialize(int max_concurrency = automatic, unsigned reserved_for_masters = 1);
template <typename FuncT>
auto execute(FuncT&& _func) -> decltype(_func())
{
return _func();
}
};
} // namespace tbb
using tbb_global_control_t = tbb::global_control;
using tbb_task_group_t = tbb::task_group;
using tbb_task_arena_t = tbb::task_arena;
#endif
//--------------------------------------------------------------------------------------//
class ThreadPool;
class VUserTaskQueue;
//--------------------------------------------------------------------------------------//
class ThreadData
{
public:
template <typename Tp>
using TaskStack = std::deque<Tp>;
ThreadData(ThreadPool* tp);
~ThreadData() = default;
void update();
public:
bool is_main = false;
bool within_task = false;
intmax_t task_depth = 0;
ThreadPool* thread_pool = nullptr;
VUserTaskQueue* current_queue = nullptr;
TaskStack<VUserTaskQueue*> queue_stack = {};
public:
// Public functions
static ThreadData*& GetInstance();
};
//--------------------------------------------------------------------------------------//
} // namespace PTL
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