Moved random ground cover object management code (userdata.[ch]xx) over

[flightgear.git] / src / Scenery / FGTileLoader.cxx

diff --git a/src/Scenery/FGTileLoader.cxx b/src/Scenery/FGTileLoader.cxx
index 5123953e61f45d94b03dce1559ecadb256dc8bcf..3bbe26521f994e9a27932f5885287540ff890c84 100644 (file)
--- a/src/Scenery/FGTileLoader.cxx
+++ b/src/Scenery/FGTileLoader.cxx
@@ -24,9 +24,15 @@
 #  include <config.h>
 #endif
 
+#include <simgear/compiler.h>
+
 #include <Main/globals.hxx>
 #include "FGTileLoader.hxx"
 #include "tileentry.hxx"
+#include "tilemgr.hxx"
+
+extern ssgBranch *terrain;
+extern ssgBranch *ground;
 
 /**
  * 
@@ -50,7 +56,7 @@ FGTileLoader::~FGTileLoader()
 {
 #ifdef ENABLE_THREADS
     // Wake up its time to die.
-    cond.broadcast();
+    // queue_cond.broadcast();
 
     for (int i = 0; i < MAX_THREADS; ++i)
     {
@@ -60,6 +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
+
+
 /**
  * 
  */
@@ -73,7 +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() );
@@ -82,17 +101,61 @@ FGTileLoader::add( FGTileEntry* tile )
        beenhere = true;
     }
 
+    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();
-    tile_queue.push( tile );
-    // Signal waiting working threads.
-    cond.signal();
+    frame_cond.signal();
     mutex.unlock();
 #else
-    tile->load( tile_path, true );
+    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
+
 }
 
+
 #ifdef ENABLE_THREADS
 /**
  * 
@@ -103,28 +166,30 @@ FGTileLoader::LoaderThread::run()
     pthread_cleanup_push( cleanup_handler, loader );
     while ( true ) {
        // Wait for a load request to be placed in the queue.
-       loader->mutex.lock();
-       while (loader->empty())
-       {
-           loader->cond.wait( loader->mutex );
-       }
-
-       // Have we been canceled - exits if yes.
-       //pthread_testcancel();
-       if (loader->empty())
-       {
-           loader->mutex.unlock();
-           pthread_exit( PTHREAD_CANCELED );
-       }
+       FGTileEntry* tile = loader->tile_load_queue.pop();
 
-       // Grab the tile to load and release the mutex.
-       FGTileEntry* tile = loader->tile_queue.front();
-       loader->tile_queue.pop();
-       loader->mutex.unlock();
+        // 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();
 
        set_cancel( SGThread::CANCEL_DISABLE );
        tile->load( loader->tile_path, true );
        set_cancel( SGThread::CANCEL_DEFERRED );
+
+       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);
 }