# HG changeset patch
# User Chris Cannam
# Date 1568021017 -3600
# Node ID 762b79b49c312300fb0a7b3c778f8650ea042e3f
# Parent  e0ff22b3c888c17b9fd78ad22832a4e429262f91
Don't even ask to unload library if another plugin is loaded from it

diff -r e0ff22b3c888 -r 762b79b49c31 src/vamp-hostsdk/PluginLoader.cpp
--- a/src/vamp-hostsdk/PluginLoader.cpp	Fri Aug 16 10:18:37 2019 +0100
+++ b/src/vamp-hostsdk/PluginLoader.cpp	Mon Sep 09 10:23:37 2019 +0100
@@ -567,8 +567,18 @@
 PluginLoader::Impl::pluginDeleted(PluginDeletionNotifyAdapter *adapter)
 {
     void *handle = m_pluginLibraryHandleMap[adapter];
-    if (handle) Files::unloadLibrary(handle);
+    if (!handle) return;
+
     m_pluginLibraryHandleMap.erase(adapter);
+
+    for (auto h: m_pluginLibraryHandleMap) {
+        if (h.second == handle) {
+            // still in use
+            return;
+        }
+    }
+    
+    Files::unloadLibrary(handle);
 }
 
 PluginLoader::Impl::PluginDeletionNotifyAdapter::PluginDeletionNotifyAdapter(Plugin *plugin,