X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FScenery%2FFGTileLoader.cxx;h=3bbe26521f994e9a27932f5885287540ff890c84;hb=56592f3869c41e4f189e9ab44abb1a0898c90f4b;hp=17cc52fc3b39c7cc9ba29c7bab946c9300ff39a9;hpb=051e2a6dc3b6db4b9bc42fb31f3079d1602cf29c;p=flightgear.git

diff --git a/src/Scenery/FGTileLoader.cxx b/src/Scenery/FGTileLoader.cxx
index 17cc52fc3..3bbe26521 100644
--- a/src/Scenery/FGTileLoader.cxx
+++ b/src/Scenery/FGTileLoader.cxx
@@ -24,6 +24,8 @@
 #  include <config.h>
 #endif
 
+#include <simgear/compiler.h>
+
 #include <Main/globals.hxx>
 #include "FGTileLoader.hxx"
 #include "tileentry.hxx"
@@ -64,6 +66,19 @@ FGTileLoader::~FGTileLoader()
 #endif // ENABLE_THREADS
 }
 
+
+#if 0 // we don't ever want to do this I don't think
+/**
+ * 
+ */
+void FGTileLoader::reinit() {
+    while ( !tile_load_queue.empty() ) {
+	tile_load_queue.pop();
+    }
+}
+#endif
+
+
 /**
  * 
  */
@@ -77,7 +92,7 @@ FGTileLoader::add( FGTileEntry* tile )
     static bool beenhere = false;
     if (!beenhere)
     {
-	if ( globals->get_fg_scenery() != (string)"" ) {
+	if ( !globals->get_fg_scenery().empty() ) {
 	    tile_path.set( globals->get_fg_scenery() );
 	} else {
 	    tile_path.set( globals->get_fg_root() );
@@ -86,25 +101,58 @@ FGTileLoader::add( FGTileEntry* tile )
 	beenhere = true;
     }
 
-#ifdef ENABLE_THREADS
-    tile_queue.push( tile );
-#else
-    tile->load( tile_path, true );
-    tile->add_ssg_nodes( terrain, ground );
-#endif // ENABLE_THREADS
+    tile_load_queue.push( tile );
 }
 
+#ifdef WISH_PLIB_WAS_THREADED // but it isn't
+/**
+ * 
+ */
+void
+FGTileLoader::remove( FGTileEntry* tile )
+{
+    tile_free_queue.push( tile );
+}
+#endif
+
 /**
  * 
  */
 void
 FGTileLoader::update()
 {
+
 #ifdef ENABLE_THREADS
+    // send a signal to the pager thread that it is allowed to load
+    // another tile
     mutex.lock();
     frame_cond.signal();
     mutex.unlock();
+#else
+    if ( !tile_load_queue.empty() ) {
+        // cout << "loading next tile ..." << endl;
+        // load the next tile in the queue
+        FGTileEntry* tile = tile_load_queue.front();
+        tile_load_queue.pop();
+
+        tile->load( tile_path, true );
+
+        FGTileMgr::ready_to_attach( tile );
+    }
+
+#ifdef WISH_PLIB_WAS_THREADED // but it isn't
+    if ( !tile_free_queue.empty() ) {
+        // cout << "freeing next tile ..." << endl;
+        // free the next tile in the queue
+        FGTileEntry* tile = tile_free_queue.front();
+        tile_free_queue.pop();
+	tile->free_tile();
+	delete tile;
+    }
+#endif
+
 #endif // ENABLE_THREADS
+
 }
 
 
@@ -118,18 +166,30 @@ FGTileLoader::LoaderThread::run()
     pthread_cleanup_push( cleanup_handler, loader );
     while ( true ) {
 	// Wait for a load request to be placed in the queue.
-	FGTileEntry* tile = loader->tile_queue.pop();
+	FGTileEntry* tile = loader->tile_load_queue.pop();
 
         // Wait for the next frame signal before we load a tile from the queue
-        // loader->mutex.lock();
-        // loader->frame_cond.wait( loader->mutex );
-        // loader->mutex.unlock();
+        loader->mutex.lock();
+        loader->frame_cond.wait( loader->mutex );
+        loader->mutex.unlock();
 
   	set_cancel( SGThread::CANCEL_DISABLE );
 	tile->load( loader->tile_path, true );
   	set_cancel( SGThread::CANCEL_DEFERRED );
 
-  	FGTileMgr::loaded( tile );
+  	FGTileMgr::ready_to_attach( tile );
+
+#ifdef WISH_PLIB_WAS_THREADED // but it isn't
+	// Handle and pending removals
+	while ( !loader->tile_free_queue.empty() ) {
+	    // cout << "freeing next tile ..." << endl;
+	    // free the next tile in the queue
+	    FGTileEntry* tile = loader->tile_free_queue.pop();
+	    tile->free_tile();
+	    delete tile;
+	}
+#endif
+
     }
     pthread_cleanup_pop(1);
 }