Thread names shortened to 15 characters to fit Posix norm.

Added get_current_thread_name()

src/libslic3r/Thread.cpp

@@ -84,6 +84,13 @@ void set_current_thread_name(const char *thread_name)
     WindowsSetThreadName(::GetCurrentThread(), thread_name);
 }
 
+void std::string get_current_thread_name() const
+{
+	wchar_t *ptr = nullptr;
+	::GetThreadDescription(::GetCurrentThread(), &ptr);
+	return std::string((ptr == nullptr) ? "" : ptr);
+}
+
 #else // _WIN32
 
 // posix
@@ -102,6 +109,12 @@ void set_current_thread_name(const char *thread_name)
 	set_thread_name(pthread_self(), thread_name);
 }
 
+void std::string get_current_thread_name() const
+{
+	char buf[16];
+	return std::string(pthread_getname_np(pthread_self(), buf, 16) == 0 ? buf : "");
+}
+
 #endif // _WIN32
 
 // Spawn (n - 1) worker threads on Intel TBB thread pool and name them by an index and a system thread ID.
@@ -149,7 +162,7 @@ void name_tbb_thread_pool_threads()
 			} else {
 				assert(range.begin() > 0);
 				std::ostringstream name;
-		        name << "slic3r_tbbpool_" << range.begin() << "_" << thread_id;
+		        name << "slic3r_tbb_" << range.begin();
 		        set_current_thread_name(name.str());
     		}
         });

src/libslic3r/Thread.hpp

@@ -7,6 +7,8 @@
 
 namespace Slic3r {
 
+// Set / get thread name.
+// pthread_setname_np supports maximum 15 character thread names! (16th character is the null terminator)
 void set_thread_name(std::thread &thread, const char *thread_name);
 inline void set_thread_name(std::thread &thread, const std::string &thread_name) { set_thread_name(thread, thread_name.c_str()); }
 void set_thread_name(boost::thread &thread, const char *thread_name);
@@ -14,6 +16,8 @@ inline void set_thread_name(boost::thread &thread, const std::string &thread_nam
 void set_current_thread_name(const char *thread_name);
 inline void set_current_thread_name(const std::string &thread_name) { set_current_thread_name(thread_name.c_str()); }
 
+void std::string get_current_thread_name() const;
+
 // To be called somewhere before the TBB threads are spinned for the first time, to
 // give them names recognizible in the debugger.
 void name_tbb_thread_pool_threads();

src/slic3r/GUI/BackgroundSlicingProcess.cpp

@@ -224,7 +224,7 @@ void BackgroundSlicingProcess::process_sla()
 
 void BackgroundSlicingProcess::thread_proc()
 {
-    set_current_thread_name("slic3r_BackgroundSlicingProcess");
+    set_current_thread_name("slic3r_BgSlcPcs");
 	name_tbb_thread_pool_threads();
 
 	assert(m_print != nullptr);