drop deprecated TBB components (#6590)

Quite some time ago, many of the TBB components were deprecated in favor
of their near-equivalents in the STL or, in the case of task_scheduler_init,
were broken up and reconstituted under a less ad-hoc logic. Every time a header
file marked deprecated gets included, a rather loud warning is emitted, which
leads to a complete TBB's domination over the stderr stream during build time,
making it harder to notice _legitimate_ warnings.

Instead of merely muting the output with TBB_SUPPRESS_DEPRECATED_MESSAGES,
perform a genuine migration away from the deprecated components with the added
benefit of achieving a source compatibility with oneTBB, the successor to TBB
which has dropped the deprecated API for good.

What got replaced for what?

| Deprecated				| Replacement					|
| ------------------------------------- | --------------------------------------------- |
| `tbb::atomic`				| `std::atomic`					|
| `tbb::mutex`				| `std::mutex`					|
| `tbb::mutex::scoped_lock`		| `std::scoped_lock<std::mutex>`		|
| `tbb::mutex::scoped_lock` (empty)	| `std::unique_lock<std::mutex>` (deferred)	|
| `tbb::task_scheduler_init`		| `tbb::global_control`				|
| `tbb::this_thread`			| `std::this_thread`				|

Signed-off-by: Roman Beranek <roman.beranek@prusa3d.com>

src/libslic3r/Execution/ExecutionTBB.hpp

@@ -1,8 +1,9 @@
 #ifndef EXECUTIONTBB_HPP
 #define EXECUTIONTBB_HPP
 
+#include <mutex>
+
 #include <tbb/spin_mutex.h>
-#include <tbb/mutex.h>
 #include <tbb/parallel_for.h>
 #include <tbb/parallel_reduce.h>
 #include <tbb/task_arena.h>
@@ -34,7 +35,7 @@ private:
 
 public:
     using SpinningMutex = tbb::spin_mutex;
-    using BlockingMutex = tbb::mutex;
+    using BlockingMutex = std::mutex;
 
     template<class It, class Fn>
     static void for_each(const ExecutionTBB &,

src/libslic3r/Print.cpp

@@ -36,7 +36,7 @@ PrintRegion::PrintRegion(PrintRegionConfig &&config) : PrintRegion(std::move(con
 
 void Print::clear() 
 {
-	tbb::mutex::scoped_lock lock(this->state_mutex());
+	std::scoped_lock<std::mutex> lock(this->state_mutex());
     // The following call should stop background processing if it is running.
     this->invalidate_all_steps();
 	for (PrintObject *object : m_objects)
@@ -252,7 +252,7 @@ bool Print::is_step_done(PrintObjectStep step) const
 {
     if (m_objects.empty())
         return false;
-    tbb::mutex::scoped_lock lock(this->state_mutex());
+    std::scoped_lock<std::mutex> lock(this->state_mutex());
     for (const PrintObject *object : m_objects)
         if (! object->is_step_done_unguarded(step))
             return false;

src/libslic3r/PrintApply.cpp

@@ -915,7 +915,7 @@ Print::ApplyStatus Print::apply(const Model &model, DynamicPrintConfig new_full_
         update_apply_status(false);
 
     // Grab the lock for the Print / PrintObject milestones.
-	tbb::mutex::scoped_lock lock(this->state_mutex());
+	std::scoped_lock<std::mutex> lock(this->state_mutex());
 
     // The following call may stop the background processing.
     if (! print_diff.empty())

src/libslic3r/PrintBase.cpp

@@ -104,7 +104,7 @@ void PrintBase::status_update_warnings(int step, PrintStateBase::WarningLevel /*
         printf("%s warning: %s\n",  print_object ? "print_object" : "print", message.c_str());
 }
 
-tbb::mutex& PrintObjectBase::state_mutex(PrintBase *print)
+std::mutex& PrintObjectBase::state_mutex(PrintBase *print)
 { 
 	return print->state_mutex();
 }

src/libslic3r/PrintBase.hpp

@@ -6,12 +6,8 @@
 #include <vector>
 #include <string>
 #include <functional>
-
-// tbb/mutex.h includes Windows, which in turn defines min/max macros. Convince Windows.h to not define these min/max macros.
-#ifndef NOMINMAX
-    #define NOMINMAX
-#endif
-#include "tbb/mutex.h"
+#include <atomic>
+#include <mutex>
 
 #include "ObjectID.hpp"
 #include "Model.hpp"
@@ -84,23 +80,23 @@ class PrintState : public PrintStateBase
 public:
     PrintState() {}
 
-    StateWithTimeStamp state_with_timestamp(StepType step, tbb::mutex &mtx) const {
-        tbb::mutex::scoped_lock lock(mtx);
+    StateWithTimeStamp state_with_timestamp(StepType step, std::mutex &mtx) const {
+        std::scoped_lock<std::mutex> lock(mtx);
         StateWithTimeStamp state = m_state[step];
         return state;
     }
 
-    StateWithWarnings state_with_warnings(StepType step, tbb::mutex &mtx) const {
-        tbb::mutex::scoped_lock lock(mtx);
+    StateWithWarnings state_with_warnings(StepType step, std::mutex &mtx) const {
+        std::scoped_lock<std::mutex> lock(mtx);
         StateWithWarnings state = m_state[step];
         return state;
     }
 
-    bool is_started(StepType step, tbb::mutex &mtx) const {
+    bool is_started(StepType step, std::mutex &mtx) const {
         return this->state_with_timestamp(step, mtx).state == STARTED;
     }
 
-    bool is_done(StepType step, tbb::mutex &mtx) const {
+    bool is_done(StepType step, std::mutex &mtx) const {
         return this->state_with_timestamp(step, mtx).state == DONE;
     }
 
@@ -121,8 +117,8 @@ public:
     // This is necessary to block until the Print::apply() updates its state, which may
     // influence the processing step being entered.
     template<typename ThrowIfCanceled>
-    bool set_started(StepType step, tbb::mutex &mtx, ThrowIfCanceled throw_if_canceled) {
-        tbb::mutex::scoped_lock lock(mtx);
+    bool set_started(StepType step, std::mutex &mtx, ThrowIfCanceled throw_if_canceled) {
+        std::scoped_lock<std::mutex> lock(mtx);
         // If canceled, throw before changing the step state.
         throw_if_canceled();
 #ifndef NDEBUG
@@ -154,8 +150,8 @@ public:
     // 		Timestamp when this stepentered the DONE state.
     // 		bool indicates whether the UI has to update the slicing warnings of this step or not.
 	template<typename ThrowIfCanceled>
-	std::pair<TimeStamp, bool> set_done(StepType step, tbb::mutex &mtx, ThrowIfCanceled throw_if_canceled) {
-        tbb::mutex::scoped_lock lock(mtx);
+	std::pair<TimeStamp, bool> set_done(StepType step, std::mutex &mtx, ThrowIfCanceled throw_if_canceled) {
+        std::scoped_lock<std::mutex> lock(mtx);
         // If canceled, throw before changing the step state.
         throw_if_canceled();
         assert(m_state[step].state == STARTED);
@@ -266,9 +262,9 @@ public:
     // Return value:
     // 		Current milestone (StepType).
     // 		bool indicates whether the UI has to be updated or not.
-    std::pair<StepType, bool> active_step_add_warning(PrintStateBase::WarningLevel warning_level, const std::string &message, int message_id, tbb::mutex &mtx)
+    std::pair<StepType, bool> active_step_add_warning(PrintStateBase::WarningLevel warning_level, const std::string &message, int message_id, std::mutex &mtx)
     {
-        tbb::mutex::scoped_lock lock(mtx);
+        std::scoped_lock<std::mutex> lock(mtx);
         assert(m_step_active != -1);
         StateWithWarnings &state = m_state[m_step_active];
         assert(state.state == STARTED);
@@ -314,7 +310,7 @@ protected:
     PrintObjectBase(ModelObject *model_object) : m_model_object(model_object) {}
     virtual ~PrintObjectBase() {}
     // Declared here to allow access from PrintBase through friendship.
-	static tbb::mutex&                  state_mutex(PrintBase *print);
+	static std::mutex&                  state_mutex(PrintBase *print);
 	static std::function<void()>        cancel_callback(PrintBase *print);
 	// Notify UI about a new warning of a milestone "step" on this PrintObjectBase.
 	// The UI will be notified by calling a status callback registered on print.
@@ -475,7 +471,7 @@ protected:
 	friend class PrintObjectBase;
     friend class BackgroundSlicingProcess;
 
-    tbb::mutex&            state_mutex() const { return m_state_mutex; }
+    std::mutex&            state_mutex() const { return m_state_mutex; }
     std::function<void()>  cancel_callback() { return m_cancel_callback; }
 	void				   call_cancel_callback() { m_cancel_callback(); }
 	// Notify UI about a new warning of a milestone "step" on this PrintBase.
@@ -502,7 +498,7 @@ protected:
     status_callback_type                    m_status_callback;
 
 private:
-    tbb::atomic<CancelStatus>               m_cancel_status;
+    std::atomic<CancelStatus>               m_cancel_status;
 
     // Callback to be evoked to stop the background processing before a state is updated.
     cancel_callback_type                    m_cancel_callback = [](){};
@@ -510,7 +506,7 @@ private:
     // Mutex used for synchronization of the worker thread with the UI thread:
     // The mutex will be used to guard the worker thread against entering a stage
     // while the data influencing the stage is modified.
-    mutable tbb::mutex                      m_state_mutex;
+    mutable std::mutex                      m_state_mutex;
 
     friend PrintTryCancel;
 };

src/libslic3r/PrintObject.cpp

@@ -22,7 +22,6 @@
 #include <boost/log/trivial.hpp>
 
 #include <tbb/parallel_for.h>
-#include <tbb/atomic.h>
 
 #include <Shiny/Shiny.h>
 

src/libslic3r/SLA/SupportTree.cpp

@@ -17,9 +17,6 @@
 #include <libnest2d/optimizers/nlopt/genetic.hpp>
 #include <libnest2d/optimizers/nlopt/subplex.hpp>
 #include <boost/log/trivial.hpp>
-#include <tbb/parallel_for.h>
-#include <tbb/mutex.h>
-#include <tbb/spin_mutex.h>
 #include <libslic3r/I18N.hpp>
 
 //! macro used to mark string used at localization,

src/libslic3r/SLAPrint.cpp

@@ -19,8 +19,6 @@
 #include <libnest2d/tools/benchmark.h>
 #endif
 
-//#include <tbb/spin_mutex.h>//#include "tbb/mutex.h"
-
 #include "I18N.hpp"
 
 //! macro used to mark string used at localization,
@@ -118,7 +116,7 @@ bool validate_pad(const indexed_triangle_set &pad, const sla::PadConfig &pcfg)
 
 void SLAPrint::clear()
 {
-    tbb::mutex::scoped_lock lock(this->state_mutex());
+    std::scoped_lock<std::mutex> lock(this->state_mutex());
     // The following call should stop background processing if it is running.
     this->invalidate_all_steps();
     for (SLAPrintObject *object : m_objects)
@@ -212,7 +210,7 @@ SLAPrint::ApplyStatus SLAPrint::apply(const Model &model, DynamicPrintConfig con
         update_apply_status(false);
 
     // Grab the lock for the Print / PrintObject milestones.
-    tbb::mutex::scoped_lock lock(this->state_mutex());
+    std::scoped_lock<std::mutex> lock(this->state_mutex());
 
     // The following call may stop the background processing.
     bool invalidate_all_model_objects = false;
@@ -514,7 +512,7 @@ SLAPrint::ApplyStatus SLAPrint::apply(const Model &model, DynamicPrintConfig con
 void SLAPrint::set_task(const TaskParams &params)
 {
     // Grab the lock for the Print / PrintObject milestones.
-    tbb::mutex::scoped_lock lock(this->state_mutex());
+    std::scoped_lock<std::mutex> lock(this->state_mutex());
 
     int n_object_steps = int(params.to_object_step) + 1;
     if (n_object_steps == 0)
@@ -884,7 +882,7 @@ bool SLAPrint::is_step_done(SLAPrintObjectStep step) const
 {
     if (m_objects.empty())
         return false;
-    tbb::mutex::scoped_lock lock(this->state_mutex());
+    std::scoped_lock<std::mutex> lock(this->state_mutex());
     for (const SLAPrintObject *object : m_objects)
         if (! object->is_step_done_unguarded(step))
             return false;

src/libslic3r/SupportMaterial.cpp

@@ -14,7 +14,6 @@
 #include <boost/container/static_vector.hpp>
 
 #include <tbb/parallel_for.h>
-#include <tbb/atomic.h>
 #include <tbb/spin_mutex.h>
 #include <tbb/task_group.h>
 

src/libslic3r/Thread.cpp

@@ -9,10 +9,10 @@
 #include <atomic>
 #include <condition_variable>
 #include <mutex>
+#include <thread>
+#include <tbb/global_control.h>
 #include <tbb/parallel_for.h>
-#include <tbb/tbb_thread.h>
 #include <tbb/task_arena.h>
-#include <tbb/task_scheduler_init.h>
 
 #include "Thread.hpp"
 
@@ -206,13 +206,13 @@ void name_tbb_thread_pool_threads()
 	nthreads = 1;
 #endif
 
-	if (nthreads != nthreads_hw) 
-		new tbb::task_scheduler_init(int(nthreads));
+	if (nthreads != nthreads_hw)
+		tbb::global_control(tbb::global_control::max_allowed_parallelism, nthreads);
 
 	std::atomic<size_t>		nthreads_running(0);
 	std::condition_variable cv;
 	std::mutex				cv_m;
-	auto					master_thread_id = tbb::this_tbb_thread::get_id();
+	auto					master_thread_id = std::this_thread::get_id();
     tbb::parallel_for(
         tbb::blocked_range<size_t>(0, nthreads, 1),
         [&nthreads_running, nthreads, &master_thread_id, &cv, &cv_m](const tbb::blocked_range<size_t> &range) {
@@ -226,7 +226,7 @@ void name_tbb_thread_pool_threads()
 				std::unique_lock<std::mutex> lk(cv_m);
 			    cv.wait(lk, [&nthreads_running, nthreads]{return nthreads_running == nthreads;});
         	}
-        	auto thread_id = tbb::this_tbb_thread::get_id();
+        	auto thread_id = std::this_thread::get_id();
 			if (thread_id == master_thread_id) {
 				// The calling thread runs the 0'th task.
 				assert(range.begin() == 0);

src/libslic3r/pchheader.hpp

@@ -100,12 +100,9 @@
 #include <boost/thread.hpp>
 #include <boost/version.hpp>
 
-#include <tbb/atomic.h>
 #include <tbb/parallel_for.h>
 #include <tbb/spin_mutex.h>
-#include <tbb/mutex.h>
 #include <tbb/task_group.h>
-#include <tbb/task_scheduler_init.h>
 
 #include <Eigen/Dense>
 #include <Eigen/Geometry>

src/libslic3r/utils.cpp

@@ -43,7 +43,7 @@
 #include <boost/nowide/convert.hpp>
 #include <boost/nowide/cstdio.hpp>
 
-#include <tbb/task_scheduler_init.h>
+#include <tbb/global_control.h>
 
 #if defined(__linux__) || defined(__GNUC__ )
 #include <strings.h>
@@ -118,9 +118,7 @@ void trace(unsigned int level, const char *message)
 void disable_multi_threading()
 {
     // Disable parallelization so the Shiny profiler works
-    static tbb::task_scheduler_init *tbb_init = nullptr;
-    if (tbb_init == nullptr)
-        tbb_init = new tbb::task_scheduler_init(1);
+    tbb::global_control(tbb::global_control::max_allowed_parallelism, 1);
 }
 
 static std::string g_var_dir;