comparison transform/TransformFactory.cpp @ 485:9eb7ef610d7f

* Add more informative text to Find a Transform (particularly when none
  available)

     }
 
     return m_transforms[id];
 }
 
+bool
+TransformFactory::haveInstalledTransforms()
+{
+    populateTransforms();
+    return !m_transforms.empty();
+}
+
 TransformList
 TransformFactory::getUninstalledTransformDescriptions()
 {
     m_populatingSlowly = false;
     populateUninstalledTransforms();

     if (m_uninstalledTransforms.find(id) == m_uninstalledTransforms.end()) {
         return TransformDescription();
     }
 
     return m_uninstalledTransforms[id];
+}
+
+bool
+TransformFactory::haveUninstalledTransforms(bool waitForCheckToComplete)
+{
+    if (waitForCheckToComplete) {
+        populateUninstalledTransforms();
+    } else {
+        if (!m_uninstalledTransformsMutex.tryLock()) {
+            return false;
+        }
+        if (!m_uninstalledTransformsPopulated) {
+            m_uninstalledTransformsMutex.unlock();
+            return false;
+        }
+        m_uninstalledTransformsMutex.unlock();
+    }
+
+    return !m_uninstalledTransforms.empty();
 }
 
 TransformFactory::TransformInstallStatus
 TransformFactory::getTransformInstallStatus(TransformId id)
 {