Add test using signal DDCore handler

examples/ClientTests/compact/InterruptTrigger.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<lccdd>
+<!-- #==========================================================================
+     #  AIDA Detector description implementation 
+     #==========================================================================
+     # Copyright (C) Organisation europeenne pour la Recherche nucleaire (CERN)
+     # All rights reserved.
+     #
+     # For the licensing terms see $DD4hepINSTALL/LICENSE.
+     # For the list of contributors see $DD4hepINSTALL/doc/CREDITS.
+     #
+     #==========================================================================
+-->
+ 
+  <info name="SiliconBlock"
+	title="Test with 2 simple silicon boxes"
+	author="Markus Frank"
+	url="http://www.cern.ch/lhcb"
+	status="development"
+	version="$Id: compact.xml 513 2013-04-05 14:31:53Z gaede $">
+    <comment>Alignment test with 2 simple boxes</comment>        
+  </info>
+
+  <includes>
+    <gdmlFile  ref="${DD4hepINSTALL}/DDDetectors/compact/elements.xml"/>
+    <gdmlFile  ref="${DD4hepINSTALL}/DDDetectors/compact/materials.xml"/>
+  </includes>
+
+  <materials>
+    <material name="G4_PbWO4">
+      <D type="density" unit="g/cm3" value="8.28"/>
+      <composite n="4" ref="O"/>
+      <composite n="1" ref="Pb"/>
+      <composite n="1" ref="W"/>
+    </material>
+  </materials>
+
+  <define>
+    <constant name="world_size" value="30*m"/>
+    <constant name="world_x" value="world_size"/>
+    <constant name="world_y" value="world_size"/>
+    <constant name="world_z" value="world_size"/>
+  </define>
+
+  <display>
+    <vis name="Invisible" showDaughters="false" visible="false"/>
+    <vis name="InvisibleWithChildren" showDaughters="true" visible="false"/>
+    <vis name="VisibleRed"  r="1.0" g="0.0" b="0.0" showDaughters="true" visible="true"/>
+    <vis name="VisibleBlue" r="0.0" g="0.0" b="1.0" showDaughters="false" visible="true"/>
+    <vis name="VisibleGreen" alpha="1.0" r="0.0" g="1.0" b="0.0" drawingStyle="solid" lineStyle="solid" showDaughters="true" visible="true"/>
+  </display>
+
+  <limits>
+    <limitset name="SiRegionLimitSet">
+      <limit name="step_length_max" particles="*" value="5.0" unit="mm" />
+      <limit name="track_length_max" particles="*" value="1.0" unit="mm" />
+    </limitset>
+  </limits>
+
+  <regions>
+    <region name="SiRegion" eunit="MeV" lunit="mm" cut="0.001" threshold="0.001">
+      <limitsetref name="SiRegionLimitSet"/>
+    </region>
+  </regions>
+
+  <detectors>
+    <detector id="1" name="SiliconBlockUpper" type="DD4hep_BoxSegment" readout="SiliconUpperHits" vis="VisibleGreen" sensitive="true" region="SiRegion" limits="SiRegionLimitSet">
+      <material name="Silicon"/>
+      <sensitive type="tracker"/>
+      <box      x="30*mm" y="100*cm" z="100*cm"/>
+      <position x="4*cm"  y="0"      z="0"/>
+      <rotation x="0"     y="0"      z="0"/>
+    </detector>
+    <detector id="2" name="InterruptTrigger" type="InterruptTrigger"/>
+    <detector id="3" name="SiliconBlockDown" type="DD4hep_BoxSegment" readout="SiliconDownHits" vis="VisibleRed" sensitive="true" region="SiRegion" limits="SiRegionLimitSet">
+      <material name="Silicon"/>
+      <sensitive type="tracker"/>
+      <box      x="30*mm" y="100*cm" z="100*cm"/>
+      <position x="-4*cm" y="0"     z="0"/>
+      <rotation x="0"     y="0"     z="0"/>
+    </detector>
+  </detectors>
+  
+  <readouts>
+    <readout name="SiliconUpperHits">
+      <segmentation type="CartesianGridXY" grid_size_x="5*mm" grid_size_y="5*mm"/>
+      <id>system:8,x:24:-12,y:-12</id>
+    </readout>
+    <readout name="SiliconDownHits">
+      <segmentation type="CartesianGridXY" grid_size_x="5*mm" grid_size_y="5*mm"/>
+      <id>system:8,x:24:-12,y:-12</id>
+    </readout>
+  </readouts>
+
+  <fields>
+    <field name="GlobalSolenoid" type="solenoid" 
+	   inner_field="5.0*tesla"
+	   outer_field="-1.5*tesla" 
+	   zmax="2*m"
+	   outer_radius="3*m">
+    </field>
+  </fields>
+
+</lccdd>

examples/ClientTests/src/InterruptTrigger.cpp

+//==========================================================================
+//  AIDA Detector description implementation 
+//--------------------------------------------------------------------------
+// Copyright (C) Organisation europeenne pour la Recherche nucleaire (CERN)
+// All rights reserved.
+//
+// For the licensing terms see $DD4hepINSTALL/LICENSE.
+// For the list of contributors see $DD4hepINSTALL/doc/CREDITS.
+//
+// Author     : M.Frank
+//
+//==========================================================================
+
+// Framework includes
+#include "DD4hep/DetFactoryHelper.h"
+#include "DD4hep/SignalHandler.h"
+#include "DD4hep/Printout.h"
+
+// C/C++ include files
+#include <cstdio>
+#include <csignal>
+#include <unistd.h>
+
+using namespace dd4hep;
+
+static bool signal_handler(void* user_context, int signal)   {
+  printout(ALWAYS,"SignalHandler",
+	   "+++ Caught signal: %d context: %p. exit process.",
+	   signal, user_context);
+  ::fflush(stdout);
+  ::exit(EINVAL);
+  return true;
+}
+
+static Ref_t create_detector(Detector& , xml_h e, SensitiveDetector )  {
+  // XML detector object: DDCore/XML/XMLDetector.h
+  xml_dim_t x_det = e;  
+  //Create the DetElement for dd4hep
+  DetElement d_det(x_det.nameStr(),x_det.id());
+
+  SignalHandler handler;
+  handler.registerHandler(SIGINT, (void*)0xFEEDBABE, signal_handler);
+
+  printout(ALWAYS,"SignalTrigger","+++ Sending interrupt signal to self...");
+  ::kill(::getpid(), SIGINT);
+  
+  return d_det;
+}
+
+DECLARE_DETELEMENT(InterruptTrigger,create_detector)