Add debug operator for QResourceManager

Useful for dumping out the resource tables to debug issues on the
backend.

Change-Id: I8f140d544b208b0b6006e08da6d36e031e781b2a
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>

1 files changed, 37 insertions, 0 deletions

diff --git a/src/core/resources/qresourcemanager_p.h b/src/core/resources/qresourcemanager_p.h
index e1efb1bdb..ad337adaf 100644
--- a/src/core/resources/qresourcemanager_p.h
+++ b/src/core/resources/qresourcemanager_p.h
@@ -375,6 +375,20 @@ private:
 
 };
 
+#ifndef QT_NO_DEBUG_STREAM
+template <typename ValueType, typename KeyType, uint INDEXBITS,
+          template <typename, uint> class AllocatingPolicy,
+          template <class> class LockingPolicy
+          >
+class QResourceManager;
+
+template <typename ValueType, typename KeyType, uint INDEXBITS = 16,
+          template <typename, uint> class AllocatingPolicy = ArrayAllocatingPolicy,
+          template <class> class LockingPolicy = NonLockingPolicy
+          >
+QDebug operator<<(QDebug dbg, const QResourceManager<ValueType, KeyType, INDEXBITS, AllocatingPolicy, LockingPolicy> &manager);
+#endif
+
 template <typename ValueType, typename KeyType, uint INDEXBITS = 16,
           template <typename, uint> class AllocatingPolicy = ArrayAllocatingPolicy,
           template <class> class LockingPolicy = NonLockingPolicy
@@ -491,8 +505,31 @@ private:
         m_handleManager.release(handle);
         AllocatingPolicy<ValueType, INDEXBITS>::releaseResource(val);
     }
+
+    friend QDebug operator<< <>(QDebug dbg, const QResourceManager<ValueType, KeyType, INDEXBITS, AllocatingPolicy, LockingPolicy> &manager);
 };
 
+#ifndef QT_NO_DEBUG_STREAM
+template <typename ValueType, typename KeyType, uint INDEXBITS,
+          template <typename, uint> class AllocatingPolicy,
+          template <class> class LockingPolicy
+          >
+QDebug operator<<(QDebug dbg, const QResourceManager<ValueType, KeyType, INDEXBITS, AllocatingPolicy, LockingPolicy> &manager)
+{
+    QDebugStateSaver saver(dbg);
+    dbg << "Contains" << manager.count() << "items" << "of a maximum" << manager.maximumSize() << endl;
+
+    dbg << "Key to Handle Map:" << endl;
+    const auto end = manager.m_keyToHandleMap.cend();
+    for (auto it = manager.m_keyToHandleMap.cbegin(); it != end; ++it)
+        dbg << "QNodeId =" << it.key() << "Handle =" << it.value() << endl;
+
+    dbg << "Resources:" << endl;
+    dbg << manager.m_handleManager;
+    return dbg;
+}
+#endif
+
 }// Qt3D
 
 QT_END_NAMESPACE