9bc69efde6
slicing process: 1) "C" locales are always enforced. 2) OSX Quality of Service level is set to make sure the slicing runs on fat cores on Apple Silicon if some fat cores are available.
85 lines
3.5 KiB
C++
85 lines
3.5 KiB
C++
#ifndef GUI_THREAD_HPP
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#define GUI_THREAD_HPP
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#include <utility>
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#include <string>
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#include <thread>
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#include <boost/thread.hpp>
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#include <tbb/task_scheduler_observer.h>
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#include <tbb/enumerable_thread_specific.h>
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namespace Slic3r {
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// Set / get thread name.
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// Returns false if the API is not supported.
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//
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// It is a good idea to name the main thread before spawning children threads, because dynamic linking is used on Windows 10
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// to initialize Get/SetThreadDescription functions, which is not thread safe.
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//
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// pthread_setname_np supports maximum 15 character thread names! (16th character is the null terminator)
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//
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// Methods taking the thread as an argument are not supported by OSX.
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// Naming threads is only supported on newer Windows 10.
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bool set_thread_name(std::thread &thread, const char *thread_name);
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inline bool set_thread_name(std::thread &thread, const std::string &thread_name) { return set_thread_name(thread, thread_name.c_str()); }
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bool set_thread_name(boost::thread &thread, const char *thread_name);
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inline bool set_thread_name(boost::thread &thread, const std::string &thread_name) { return set_thread_name(thread, thread_name.c_str()); }
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bool set_current_thread_name(const char *thread_name);
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inline bool set_current_thread_name(const std::string &thread_name) { return set_current_thread_name(thread_name.c_str()); }
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// OSX specific: Set Quality of Service to "user initiated", so that the threads will be scheduled to high performance
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// cores if available.
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void set_current_thread_qos();
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// Returns nullopt if not supported.
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// Not supported by OSX.
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// Naming threads is only supported on newer Windows 10.
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std::optional<std::string> get_current_thread_name();
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// To be called somewhere before the TBB threads are spinned for the first time, to
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// give them names recognizible in the debugger.
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// Also it sets locale of the worker threads to "C" for the G-code generator to produce "." as a decimal separator.
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void name_tbb_thread_pool_threads_set_locale();
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template<class Fn>
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inline boost::thread create_thread(boost::thread::attributes &attrs, Fn &&fn)
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{
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// Duplicating the stack allocation size of Thread Building Block worker
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// threads of the thread pool: allocate 4MB on a 64bit system, allocate 2MB
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// on a 32bit system by default.
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attrs.set_stack_size((sizeof(void*) == 4) ? (2048 * 1024) : (4096 * 1024));
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return boost::thread{attrs, std::forward<Fn>(fn)};
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}
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template<class Fn> inline boost::thread create_thread(Fn &&fn)
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{
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boost::thread::attributes attrs;
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return create_thread(attrs, std::forward<Fn>(fn));
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}
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// For unknown reasons and in sporadic cases when GCode export is processing, some participating thread
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// in tbb::parallel_pipeline has not set locales to "C", probably because this thread is newly spawned.
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// So in this class method on_scheduler_entry is called for every thread before it starts participating
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// in tbb::parallel_pipeline to ensure that locales are set correctly
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//
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// For tbb::parallel_pipeline, it seems that on_scheduler_entry is called for every layer and every filter.
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// We ensure using thread-local storage that locales will be set to "C" just once for any participating thread.
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class TBBLocalesSetter : public tbb::task_scheduler_observer
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{
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public:
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TBBLocalesSetter() { this->observe(true); }
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~TBBLocalesSetter() override { this->observe(false); };
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void on_scheduler_entry(bool is_worker) override;
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private:
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tbb::enumerable_thread_specific<bool, tbb::cache_aligned_allocator<bool>, tbb::ets_key_usage_type::ets_key_per_instance> m_is_locales_sets{ false };
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};
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}
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#endif // GUI_THREAD_HPP
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