1 files changed, 25 insertions, 0 deletions
diff --git a/apt-pkg/pkgsystem.cc b/apt-pkg/pkgsystem.cc
index efbaddcdb..eaa3f5ab7 100644
--- a/apt-pkg/pkgsystem.cc
+++ b/apt-pkg/pkgsystem.cc
@@ -12,6 +12,7 @@
 #include <config.h>
 
 #include <apt-pkg/debsystem.h>
+#include <apt-pkg/error.h>
 #include <apt-pkg/macros.h>
 #include <apt-pkg/pkgsystem.h>
 
@@ -85,4 +86,28 @@ map_id_t pkgSystem::GetVersionMapping(map_id_t const in) const
 }
 									/*}}}*/
 
+bool pkgSystem::LockInner()				/*{{{*/
+{
+   debSystem * const deb = dynamic_cast<debSystem *>(this);
+   if (deb != NULL)
+      return deb->LockInner();
+   return _error->Error("LockInner is not implemented");
+}
+									/*}}}*/
+bool pkgSystem::UnLockInner(bool NoErrors)				/*{{{*/
+{
+   debSystem * const deb = dynamic_cast<debSystem *>(this);
+   if (deb != NULL)
+      return deb->UnLockInner(NoErrors);
+   return _error->Error("UnLockInner is not implemented");
+}
+									/*}}}*/
+bool pkgSystem::IsLocked() 						/*{{{*/
+{
+   debSystem * const deb = dynamic_cast<debSystem *>(this);
+   if (deb != NULL)
+      return deb->IsLocked();
+   return true;
+}
+									/*}}}*/
 pkgSystem::~pkgSystem() {}