Revert "move libthread to libstb-hal"

This reverts commit 95ee7f9e98.

common/Makefile.am

@@ -31,6 +31,8 @@ endif
 endif
 
 libcommon_la_SOURCES += \
+	thread_abstraction.cpp \
+	mutex_abstraction.cpp \
 	lt_debug.cpp \
 	proc_tools.c \
 	pwrmngr.cpp

common/mutex_abstraction.cpp

@@ -0,0 +1,22 @@
+#include "mutex_abstraction.h"
+
+Mutex::Mutex() :
+	mMutex()
+{
+	pthread_mutex_init(&mMutex, 0);
+}
+
+Mutex::~Mutex()
+{
+	pthread_mutex_destroy(&mMutex);
+}
+
+void Mutex::lock()
+{
+	pthread_mutex_lock(&mMutex);
+}
+
+void Mutex::unlock()
+{
+	pthread_mutex_unlock(&mMutex);
+}

common/mutex_abstraction.h

@@ -0,0 +1,20 @@
+#ifndef _MUTEX_ABSTRACTION_H
+#define _MUTEX_ABSTRACTION_H
+
+#include <pthread.h>
+
+class Mutex
+{
+	pthread_mutex_t mMutex;
+
+	Mutex(const Mutex&);
+	const Mutex& operator=(const Mutex&);
+
+	public:
+		Mutex();
+		virtual ~Mutex();
+		void lock();
+		void unlock();
+};
+
+#endif

common/thread_abstraction.cpp

@@ -0,0 +1,34 @@
+#include "thread_abstraction.h"
+
+SimpleThread::SimpleThread() :
+	mIsRunning(false),
+	mThread()
+{
+}
+
+SimpleThread::~SimpleThread()
+{
+	// if thread is still running on object destruction, cancel thread the hard way:
+	if (mIsRunning)
+	{
+		pthread_cancel(mThread);
+	}
+}
+
+void SimpleThread::startThread()
+{
+	mIsRunning = true;
+	pthread_create(&mThread, 0, &SimpleThread::runThread, this);
+}
+
+void SimpleThread::joinThread()
+{
+	pthread_join(mThread, 0);
+	mIsRunning = false;
+}
+
+void* SimpleThread::runThread(void* ptr)
+{
+	static_cast<SimpleThread*>(ptr)->run();
+	return 0;
+}

common/thread_abstraction.h

@@ -0,0 +1,25 @@
+#ifndef _SIMPLETHREAD_ABSTRACTION_H
+#define _SIMPLETHREAD_ABSTRACTION_H
+
+#include <pthread.h>
+
+class SimpleThread
+{
+	bool mIsRunning;
+	pthread_t mThread;
+
+	static void* runThread(void*);
+	SimpleThread(const SimpleThread&);
+	const SimpleThread& operator=(const SimpleThread&);
+
+	public:
+		SimpleThread();
+		~SimpleThread();
+		void startThread();
+		void joinThread();
+
+	protected:
+		virtual void run() = 0;
+};
+
+#endif