X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=simgear%2Fstructure%2Fcommands.cxx;h=fd67ae4fc3edebac035ca0f5cf02ea86a48853fd;hb=f3c131ffaf04d8e04595c1271f8a70c8a9d89f5f;hp=2e2c59215494430a72498266e4617960d4f0bab9;hpb=d22640ef4e938b523bdc30cd83370977d30de856;p=simgear.git

diff --git a/simgear/structure/commands.cxx b/simgear/structure/commands.cxx
index 2e2c5921..fd67ae4f 100644
--- a/simgear/structure/commands.cxx
+++ b/simgear/structure/commands.cxx
@@ -4,10 +4,21 @@
 //
 // $Id$
 
+#ifdef HAVE_CONFIG_H
+#  include <simgear_config.h>
+#endif
+
+#include <memory>
 #include <simgear/props/props_io.hxx>
 
+#include <OpenThreads/Mutex>
+#include <OpenThreads/ScopedLock>
+
 #include "commands.hxx"
 
+#include <simgear/math/SGMath.hxx>
+#include <simgear/structure/exception.hxx>
+#include <simgear/debug/logstream.hxx>
 
 
 ////////////////////////////////////////////////////////////////////////
@@ -25,40 +36,64 @@ SGCommandMgr::~SGCommandMgr ()
   // no-op
 }
 
+OpenThreads::Mutex SGCommandMgr::_instanceMutex;
+
+SGCommandMgr*
+SGCommandMgr::instance()
+{
+  static std::auto_ptr<SGCommandMgr> mgr;
+  if (mgr.get())
+    return mgr.get();
+
+  OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_instanceMutex);
+  if (mgr.get())
+    return mgr.get();
+
+  mgr = std::auto_ptr<SGCommandMgr>(new SGCommandMgr);
+  return mgr.get();
+}
+
 void
-SGCommandMgr::addCommand (const string &name, command_t command)
+SGCommandMgr::addCommand (const std::string &name, command_t command)
 {
   _commands[name] = command;
 }
 
 SGCommandMgr::command_t
-SGCommandMgr::getCommand (const string &name) const
+SGCommandMgr::getCommand (const std::string &name) const
 {
   const command_map::const_iterator it = _commands.find(name);
   return (it != _commands.end() ? it->second : 0);
 }
 
-vector<string>
+string_list
 SGCommandMgr::getCommandNames () const
 {
-  vector<string> names;
+  string_list names;
   command_map::const_iterator it = _commands.begin();
   command_map::const_iterator last = _commands.end();
   while (it != last) {
     names.push_back(it->first);
-    it++;
+    ++it;
   }
   return names;
 }
 
 bool
-SGCommandMgr::execute (const string &name, const SGPropertyNode * arg) const
+SGCommandMgr::execute (const std::string &name, const SGPropertyNode * arg) const
 {
   command_t command = getCommand(name);
   if (command == 0)
     return false;
-  else
+  
+  
+  try {
     return (*command)(arg);
+  } catch (sg_exception& e) {
+    SG_LOG(SG_GENERAL, SG_ALERT, "command '" << name << "' failed with exception\n"
+      << "\tmessage:" << e.getMessage() << " (from " << e.getOrigin() << ")");
+    return false;
+  }
 }
 
 // end of commands.cxx