1 files changed, 68 insertions, 0 deletions
diff --git a/source/blender/blenlib/BLI_session_uuid.h b/source/blender/blenlib/BLI_session_uuid.h
new file mode 100644
index 00000000000..05355a85b39
--- /dev/null
+++ b/source/blender/blenlib/BLI_session_uuid.h
@@ -0,0 +1,68 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#pragma once
+
+/** \file
+ * \ingroup bli
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "DNA_session_uuid_types.h"
+
+/* Generate new UUID which is unique throughout the Blender session. */
+SessionUUID BLI_session_uuid_generate(void);
+
+/* Check whether the UUID is properly generated. */
+bool BLI_session_uuid_is_generated(const SessionUUID *uuid);
+
+/* Check whether two UUIDs are identical. */
+bool BLI_session_uuid_is_equal(const SessionUUID *lhs, const SessionUUID *rhs);
+
+uint64_t BLI_session_uuid_hash_uint64(const SessionUUID *uuid);
+
+/* Utility functions to make it possible to create GHash/GSet with UUID as a key. */
+uint BLI_session_uuid_ghash_hash(const void *uuid_v);
+bool BLI_session_uuid_ghash_compare(const void *lhs_v, const void *rhs_v);
+
+#ifdef __cplusplus
+}
+#endif
+
+#ifdef __cplusplus
+
+namespace blender {
+
+inline const bool operator==(const SessionUUID &lhs, const SessionUUID &rhs)
+{
+  return BLI_session_uuid_is_equal(&lhs, &rhs);
+}
+
+template<typename T> struct DefaultHash;
+
+template<> struct DefaultHash<SessionUUID> {
+  uint64_t operator()(const SessionUUID &value) const
+  {
+    return BLI_session_uuid_hash_uint64(&value);
+  }
+};
+
+}  // namespace blender
+
+#endif