[svn-upgrade] Integrating new upstream version, ion3 (20070203)

[ion3.git] / ioncore / return.c

diff --git a/ioncore/return.c b/ioncore/return.c
new file mode 100644 (file)
index 0000000..444f548
--- /dev/null
+++ b/ioncore/return.c
@@ -0,0 +1,160 @@
+/*
+ * ion/ioncore/return.h
+ *
+ * Copyright (c) Tuomo Valkonen 1999-2007. 
+ *
+ * Ion is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <libtu/rb.h>
+#include <libmainloop/defer.h>
+
+#include "common.h"
+#include "global.h"
+#include "region.h"
+#include "pholder.h"
+#include "return.h"
+
+
+/*{{{ Storage tree */
+
+
+static Rb_node retrb=NULL;
+
+
+/*}}}*/
+
+
+
+/*{{{ Set */
+
+
+bool region_do_set_return(WRegion *reg, WPHolder *ph)
+{
+    Rb_node node;
+    int found=0;
+    
+    assert(!OBJ_IS_BEING_DESTROYED(reg));
+    
+    region_unset_return(reg);
+    
+    if(retrb==NULL){
+        retrb=make_rb();
+        if(retrb==NULL)
+            return FALSE;
+    }
+    
+    node=rb_insertp(retrb, reg, ph);
+    
+    region_notify_change(reg, ioncore_g.notifies.set_return);
+    
+    return (node!=NULL);
+}
+
+
+WPHolder *region_make_return_pholder(WRegion *reg)
+{
+    WRegion *mgr=region_manager(reg);
+    
+    if(mgr==NULL)
+        return NULL;
+    
+    return region_managed_get_pholder(mgr, reg);
+}
+
+
+/*
+extern WPHolder *region_set_return(WRegion *reg)
+{
+    WPHolder *ph=region_make_return_pholder(reg);
+    
+    if(ph!=NULL){
+        if(region_do_set_return(reg, ph))
+            return ph;
+        destroy_obj((Obj*)ph);
+    }
+    
+    return NULL;
+}
+*/
+
+
+/*}}}*/
+
+
+/*{{{ Get */
+
+Rb_node do_find(WRegion *reg)
+{
+    int found=0;
+    Rb_node node;
+    
+    if(retrb==NULL)
+        return NULL;
+    
+    node=rb_find_pkey_n(retrb, reg, &found);
+    
+    return (found ? node : NULL);
+}
+
+
+WPHolder *region_do_get_return(WRegion *reg)
+{
+    Rb_node node=do_find(reg);
+    
+    return (node!=NULL ? (WPHolder*)node->v.val : NULL);
+}
+
+
+WPHolder *region_get_return(WRegion *reg)
+{
+    /* Should managers be scanned? */
+    return region_do_get_return(reg);
+}
+
+
+/*}}}*/
+
+
+/*{{{ Unset */
+
+
+static WPHolder *do_remove_node(Rb_node node)
+{
+    WPHolder *ph=(WPHolder*)node->v.val;
+   
+    rb_delete_node(node);
+   
+    return ph;
+}
+
+
+WPHolder *region_unset_get_return(WRegion *reg)
+{
+    Rb_node node; 
+    
+    node=do_find(reg);
+    
+    if(node!=NULL){
+        region_notify_change(reg, ioncore_g.notifies.unset_return);
+        return do_remove_node(node);
+    }else{
+        return NULL;
+    }
+}
+
+
+void region_unset_return(WRegion *reg)
+{
+    WPHolder *ph=region_unset_get_return(reg);
+    
+    if(ph!=NULL)
+        mainloop_defer_destroy((Obj*)ph);
+}
+
+
+/*}}}*/
+