Add algorithm to programmatically enable/disable perf

GaudiProfiling/src/component/perf/PerfProfile.cpp

@@ -13,8 +13,6 @@
 #include <string_view>
 #include <sys/stat.h>
 
-namespace {}
-
 /** Algorithm to enable/disable profiling with Linux perf at given events.
  *
  *  Needs at least perf 5.9. To control perf record, start it as
@@ -22,7 +20,7 @@ namespace {}
  *    perf record -D -1 --control fifo:GaudiPerfProfile.fifo ... gaudirun.py ...
  *
  *  The path to the control fifo (GaudiPerfProfile.fifo) is configurable
- *  with the FIFOPath property. The fifo must be created before running the perf.
+ *  with the FIFOPath property. The fifo must be created before running perf.
  *
  */
 struct PerfProfile final : Gaudi::Functional::Consumer<void()> {
@@ -40,7 +38,7 @@ struct PerfProfile final : Gaudi::Functional::Consumer<void()> {
   }
 
   StatusCode finalize() override {
-    ::close( m_fifo );
+    if ( m_fifo != -1 ) { ::close( m_fifo ); }
     return Consumer::finalize();
   }