Thread API cleanup

This patch cleans up the thread API and comes with the following
noteworthy changes:

- Introduced Cpu_session::Weight type that replaces a formerly used
  plain integer value to prevent the accidental mix-up of
  arguments.
- The enum definition of Cpu_session::DEFAULT_WEIGHT moved to
  Cpu_session::Weight::DEFAULT_WEIGHT
- New Thread constructor that takes a 'Env &' as first argument.
  The original constructors are now marked as deprecated. For the
  common use case where the default 'Weight' and 'Affinity' are
  used, a shortcut is provided. In the long term, those two
  constructors should be the only ones to remain.
- The former 'Thread<>' class template has been renamed to
  'Thread_deprecated'.
- The former 'Thread_base' class is now called 'Thread'.
- The new 'name()' accessor returns the thread's name as 'Name'
  object as centrally defined via 'Cpu_session::Name'. It is meant to
  replace the old-fashioned 'name' method that takes a buffer and size
  as arguments.
- Adaptation of the thread test to the new API

Issue #1954

repos/dde_linux/src/drivers/wifi/wpa.h

@@ -21,7 +21,7 @@
 extern "C" int wpa_main(void);
 extern "C" void wpa_conf_reload(void);
 
-class Wpa_thread : public Genode::Thread<8 * 1024 * sizeof(long)>
+class Wpa_thread : public Genode::Thread_deprecated<8 * 1024 * sizeof(long)>
 {
 	private:
 
@@ -31,7 +31,7 @@ class Wpa_thread : public Genode::Thread<8 * 1024 * sizeof(long)>
 	public:
 
 		Wpa_thread(Genode::Lock &lock)
-		: Thread("wpa_supplicant"), _lock(lock), _exit(-1) { }
+		: Thread_deprecated("wpa_supplicant"), _lock(lock), _exit(-1) { }
 
 		void entry()
 		{

repos/dde_linux/src/include/lx_emul/impl/internal/scheduler.h

@@ -83,7 +83,7 @@ class Lx::Scheduler
 			return _ansi_esc_black();
 		}
 
-		struct Logger : Genode::Thread<0x4000>
+		struct Logger : Genode::Thread_deprecated<0x4000>
 		{
 			Timer::Connection  _timer;
 			Lx::Scheduler     &_scheduler;
@@ -91,7 +91,7 @@ class Lx::Scheduler
 
 			Logger(Lx::Scheduler &scheduler, unsigned interval_seconds)
 			:
-				Genode::Thread<0x4000>("logger"),
+				Genode::Thread_deprecated<0x4000>("logger"),
 				_scheduler(scheduler), _interval(interval_seconds)
 			{
 				start();
@@ -223,7 +223,7 @@ Lx::Task::Task(void (*func)(void*), void *arg, char const *name,
 void Lx::Task::_deinit()
 {
 	if (_stack)
-		Genode::Thread_base::myself()->free_secondary_stack(_stack);
+		Genode::Thread::myself()->free_secondary_stack(_stack);
 }
 
 

repos/dde_linux/src/include/lx_emul/impl/internal/task.h

@@ -203,7 +203,7 @@ class Lx::Task : public Lx::List<Lx::Task>::Element
 			if (_state == STATE_INIT) {
 				/* setup execution environment and call task's function */
 				_state = STATE_RUNNING;
-				Genode::Thread_base *th = Genode::Thread_base::myself();
+				Genode::Thread *th = Genode::Thread::myself();
 
 				enum { STACK_SIZE = 32 * 1024 }; /* FIXME make stack size configurable */
 				_stack = th->alloc_secondary_stack(_name, STACK_SIZE);

repos/dde_linux/src/lib/lxip/lxcc_emul.cc

@@ -708,7 +708,7 @@ static void create_event(char const *fmt, va_list list)
 	       Trace::Timestamp now  = Trace::timestamp();
 	Genode::snprintf(event, sizeof(event), "delta = %llu ms %s",
 	                 (now - last) / 2260000, buf);
-	Thread_base::trace(event);
+	Thread::trace(event);
 	last = now;
 }
 

repos/dde_linux/src/lib/lxip/socket_handler.cc

@@ -112,7 +112,7 @@ namespace Net
 class Net::Socketcall : public Genode::Signal_dispatcher_base,
                         public Genode::Signal_context_capability,
                         public Lxip::Socketcall,
-                        public Genode::Thread<64 * 1024 * sizeof(Genode::addr_t)>
+                        public Genode::Thread_deprecated<64 * 1024 * sizeof(Genode::addr_t)>
 {
 	private:
 
@@ -384,7 +384,7 @@ class Net::Socketcall : public Genode::Signal_dispatcher_base,
 	public:
 
 		Socketcall()
-		  : Thread("socketcall"),
+		  : Thread_deprecated("socketcall"),
 		    _signal(Genode::Signal_context_capability(Env::receiver()->manage(this)))
 		{
 			start();

repos/dde_linux/src/lib/usb/include/routine.h

@@ -62,7 +62,7 @@ class Routine : public Genode::List<Routine>::Element
 			/* will never return */
 			if (!_started) {
 				_started = true;
-				Genode::Thread_base *th = Genode::Thread_base::myself();
+				Genode::Thread *th = Genode::Thread::myself();
 				_stack = (char *) th->alloc_secondary_stack(_name, STACK_SIZE);
 
 				if (verbose)
@@ -121,7 +121,7 @@ class Routine : public Genode::List<Routine>::Element
 		~Routine()
 		{
 			if (_stack)
-				Genode::Thread_base::myself()->free_secondary_stack(_stack);
+				Genode::Thread::myself()->free_secondary_stack(_stack);
 		}
 
 		/**

repos/dde_linux/src/lib/wifi/scheduler.cc

@@ -62,7 +62,7 @@ bool Lx::Task::run()
 	if (_state == STATE_INIT) {
 		/* setup execution environment and call task's function */
 		_state = STATE_RUNNING;
-		Genode::Thread_base *th = Genode::Thread_base::myself();
+		Genode::Thread *th = Genode::Thread::myself();
 
 		enum { STACK_SIZE = 32 * 1024 }; /* FIXME make stack size configurable */
 		_stack = th->alloc_secondary_stack(_name, STACK_SIZE);
@@ -111,7 +111,7 @@ Lx::Task::~Task()
 {
 //	scheduler.remove(this);
 	if (_stack)
-		Genode::Thread_base::myself()->free_secondary_stack(_stack);
+		Genode::Thread::myself()->free_secondary_stack(_stack);
 }
 
 
@@ -195,7 +195,7 @@ void Lx::Scheduler::schedule()
 #include <timer_session/connection.h>
 
 namespace {
-	struct Logger : Genode::Thread<0x4000>
+	struct Logger : Genode::Thread_deprecated<0x4000>
 	{
 		Timer::Connection  _timer;
 		Lx::Scheduler     &_scheduler;
@@ -203,7 +203,7 @@ namespace {
 
 		Logger(Lx::Scheduler &scheduler, unsigned interval_seconds)
 		:
-			Genode::Thread<0x4000>("logger"),
+			Genode::Thread_deprecated<0x4000>("logger"),
 			_scheduler(scheduler), _interval(interval_seconds)
 		{
 			start();