Don't use the QGLSignalProxy to clean up the thread-local shaders.

After much back and forth I think we can use this approach for cleaning
up thread-local, shared resources. Main problem has been dealing with
dangling pointers and references, but they should be solved now.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/opengl/qgl_p.h b/src/opengl/qgl_p.h
index 9b862eb..d5083e9 100644
--- a/src/opengl/qgl_p.h
+++ b/src/opengl/qgl_p.h
@@ -624,6 +624,8 @@ public:
     void *value(const QGLContext *key);
     // Cleanup 'value' in response to a context group being destroyed.
     void cleanup(const QGLContext *ctx, void *value);
+    // Remove this resource from the group's resource list.
+    void remove(const QGLContext *ctx);
 private:
     FreeFunc free;
     QAtomicInt active;