+static cgps_config_t cgps_config_data;
+
+static cgps_data_t cgps_data = {NAN, NAN, NAN, NAN};
+
+static pthread_t cgps_thread_id;
+static pthread_mutex_t cgps_data_lock = PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t cgps_thread_lock = PTHREAD_MUTEX_INITIALIZER;
+static pthread_cond_t cgps_thread_cond = PTHREAD_COND_INITIALIZER;
+static int cgps_thread_shutdown = CGPS_FALSE;
+static int cgps_thread_running = CGPS_FALSE;
+
+/**
+ * Non blocking pause for the thread.
+ */
+static int cgps_thread_pause(cdtime_t pTime) {
+ cdtime_t until = cdtime() + pTime;
+
+ pthread_mutex_lock(&cgps_thread_lock);
+ pthread_cond_timedwait(&cgps_thread_cond, &cgps_thread_lock,
+ &CDTIME_T_TO_TIMESPEC(until));