add support to sleep for shorter periods of time;

src/common/Thread.cpp

@@ -84,9 +84,13 @@ void Thread::detach()
 
 /* Helper to sleep the current thread. */
 
-void Thread::sleep(uint32_t ms)
+void Thread::sleep(uint32_t ms, uint32_t us)
 {
-    ::usleep(ms * 1000);
+    if (us > 0U) {
+        ::usleep(us);
+    } else {
+        ::usleep(ms * 1000U);
+    }
 }
 
 // ---------------------------------------------------------------------------

src/common/Thread.h

@@ -77,8 +77,9 @@ public:
     /**
      * @brief Helper to sleep the current thread.
      * @param ms Time in milliseconds to sleep.
+     * @param us Time in microseconds to sleep.
      */
-    static void sleep(uint32_t ms);
+    static void sleep(uint32_t ms, uint32_t us = 0U);
 
 private:
     pthread_t m_thread;