Use lock when clearing and loading libTables.

Also make sure it's re-indexed after loading.

common/fp_lib_table.cpp

@@ -607,7 +607,6 @@ bool FP_LIB_TABLE::LoadGlobalTable( FP_LIB_TABLE& aTable )
         }
     }
 
-    aTable.Clear();
     aTable.Load( fn.GetFullPath() );
 
     SETTINGS_MANAGER& mgr = Pgm().GetSettingsManager();

common/lib_table_base.cpp

@@ -128,7 +128,7 @@ LIB_TABLE::~LIB_TABLE()
 }
 
 
-void LIB_TABLE::Clear()
+void LIB_TABLE::clear()
 {
     m_rows.clear();
     m_rowsMap.clear();
@@ -406,6 +406,7 @@ void LIB_TABLE::TransferRows( LIB_TABLE_ROWS& aRowsList )
 {
     std::lock_guard<std::shared_mutex> lock( m_mutex );
 
+    clear();
     m_rows.transfer( m_rows.end(), aRowsList.begin(), aRowsList.end(), aRowsList );
 
     reindex();
@@ -451,6 +452,9 @@ bool LIB_TABLE::migrate()
 
 void LIB_TABLE::Load( const wxString& aFileName )
 {
+    std::shared_lock<std::shared_mutex> lock( m_mutex );
+    clear();
+
     // It's OK if footprint library tables are missing.
     if( wxFileName::IsFileReadable( aFileName ) )
     {
@@ -461,6 +465,8 @@ void LIB_TABLE::Load( const wxString& aFileName )
 
         if( m_version != 7 && migrate() && wxFileName::IsFileWritable( aFileName ) )
             Save( aFileName );
+
+        reindex();
     }
 }
 

eeschema/dialogs/panel_sym_lib_table.cpp

@@ -1014,16 +1014,12 @@ bool PANEL_SYM_LIB_TABLE::TransferDataFromWindow()
     if( *global_model() != *m_globalTable )
     {
         m_parent->m_GlobalTableChanged = true;
-
-        m_globalTable->Clear();
         m_globalTable->TransferRows( global_model()->m_rows );
     }
 
     if( project_model() && *project_model() != *m_projectTable )
     {
         m_parent->m_ProjectTableChanged = true;
-
-        m_projectTable->Clear();
         m_projectTable->TransferRows( project_model()->m_rows );
     }
 

eeschema/symbol_lib_table.cpp

@@ -662,7 +662,6 @@ bool SYMBOL_LIB_TABLE::LoadGlobalTable( SYMBOL_LIB_TABLE& aTable )
         }
     }
 
-    aTable.Clear();
     aTable.Load( fn.GetFullPath() );
 
     SETTINGS_MANAGER& mgr = Pgm().GetSettingsManager();

include/lib_table_base.h

@@ -334,9 +334,6 @@ public:
 
     virtual ~LIB_TABLE();
 
-    /// Delete all rows.
-    void Clear();
-
     /**
      * Compares this table against another.
      *
@@ -530,6 +527,11 @@ public:
     }
 
 protected:
+    /*
+     * Do not make this public.  It MUST be called with a lock already in place.
+     */
+    void clear();
+
     /**
      * Return a #LIB_TABLE_ROW if \a aNickname is found in this table or in any chained
      * fallBack table fragment, else NULL.

pcbnew/dialogs/panel_fp_lib_table.cpp

@@ -1128,16 +1128,12 @@ bool PANEL_FP_LIB_TABLE::TransferDataFromWindow()
         if( *global_model() != *m_globalTable )
         {
             m_parent->m_GlobalTableChanged = true;
-
-            m_globalTable->Clear();
             m_globalTable->TransferRows( global_model()->m_rows );
         }
 
         if( project_model() && *project_model() != *m_projectTable )
         {
             m_parent->m_ProjectTableChanged = true;
-
-            m_projectTable->Clear();
             m_projectTable->TransferRows( project_model()->m_rows );
         }
 

pcbnew/python/scripting/pcbnew_scripting_helpers.cpp

@@ -556,10 +556,9 @@ bool WriteDRCReport( BOARD* aBoard, const wxString& aFileName, EDA_UNITS aUnits,
 
     // Load the global fp-lib-table otherwise we can't check the libs parity
     wxFileName  fn_flp = FP_LIB_TABLE::GetGlobalTableFileName();
-    if( fn_flp.FileExists() ) {
-        GFootprintTable.Clear();
+
+    if( fn_flp.FileExists() )
         GFootprintTable.Load( fn_flp.GetFullPath() );
-    }
 
     wxString drcRulesPath = prj->AbsolutePath( fn.GetFullName() );
 

qa/tests/common/test_lib_table.cpp

@@ -234,19 +234,6 @@ BOOST_AUTO_TEST_CASE( EmptyWithFallback )
 }
 
 
-/**
- * Check table clearing function
- */
-BOOST_AUTO_TEST_CASE( Clear )
-{
-    m_mainTableNoFb.Clear();
-
-    // Tables start out empty
-    BOOST_CHECK_EQUAL( m_mainTableNoFb.GetCount(), 0 );
-    BOOST_CHECK_EQUAL( true, m_mainTableNoFb.IsEmpty() );
-}
-
-
 /**
  * Check table equality function
  */