5 files changed, 21 insertions, 0 deletions
diff --git a/gnuradio-core/src/lib/runtime/gr_top_block.cc b/gnuradio-core/src/lib/runtime/gr_top_block.cc
index 09e46dfbb..3fa324257 100644
--- a/gnuradio-core/src/lib/runtime/gr_top_block.cc
+++ b/gnuradio-core/src/lib/runtime/gr_top_block.cc
@@ -78,6 +78,12 @@ gr_top_block::run()
   wait();
 }
 
+bool
+gr_top_block::is_running()
+{
+  return d_impl->is_running();
+}
+
 void
 gr_top_block::lock()
 {
diff --git a/gnuradio-core/src/lib/runtime/gr_top_block.h b/gnuradio-core/src/lib/runtime/gr_top_block.h
index b47ec019c..415bb21f2 100644
--- a/gnuradio-core/src/lib/runtime/gr_top_block.h
+++ b/gnuradio-core/src/lib/runtime/gr_top_block.h
@@ -78,6 +78,11 @@ public:
   void wait();
 
   /*!
+   * Is the flowgraph running?
+   */
+  bool is_running();
+
+  /*!
    * Lock a flowgraph in preparation for reconfiguration.  When an equal
    * number of calls to lock() and unlock() have occurred, the flowgraph
    * will be restarted automatically.
diff --git a/gnuradio-core/src/lib/runtime/gr_top_block.i b/gnuradio-core/src/lib/runtime/gr_top_block.i
index 670e5b5e5..b5ced3cda 100644
--- a/gnuradio-core/src/lib/runtime/gr_top_block.i
+++ b/gnuradio-core/src/lib/runtime/gr_top_block.i
@@ -44,6 +44,7 @@ public:
   void stop();
   void wait();
   void run();
+  bool is_running();
   void lock();
   void unlock() throw (std::runtime_error);
   void dump();
diff --git a/gnuradio-core/src/lib/runtime/gr_top_block_impl.cc b/gnuradio-core/src/lib/runtime/gr_top_block_impl.cc
index 50d480d00..97b19adad 100644
--- a/gnuradio-core/src/lib/runtime/gr_top_block_impl.cc
+++ b/gnuradio-core/src/lib/runtime/gr_top_block_impl.cc
@@ -87,6 +87,12 @@ gr_top_block_impl::~gr_top_block_impl()
   d_owner = 0;
 }
 
+bool
+gr_top_block_impl::is_running()
+{
+  return (d_state != IDLE);
+}
+
 void
 gr_top_block_impl::start()
 {
diff --git a/gnuradio-core/src/lib/runtime/gr_top_block_impl.h b/gnuradio-core/src/lib/runtime/gr_top_block_impl.h
index 35fb44ef9..794c4bc0d 100644
--- a/gnuradio-core/src/lib/runtime/gr_top_block_impl.h
+++ b/gnuradio-core/src/lib/runtime/gr_top_block_impl.h
@@ -60,6 +60,9 @@ public:
 
   // Dump the flowgraph to stdout
   void dump();
+
+  // Has flowgraph been started?
+  bool is_running();
   
 protected: