1 files changed, 37 insertions, 0 deletions
diff --git a/include/zix/function_types.h b/include/zix/function_types.h
new file mode 100644
index 0000000..8822847
--- /dev/null
+++ b/include/zix/function_types.h
@@ -0,0 +1,37 @@
+// Copyright 2016-2022 David Robillard <d@drobilla.net>
+// SPDX-License-Identifier: ISC
+
+#ifndef ZIX_FUNCTION_TYPES_H
+#define ZIX_FUNCTION_TYPES_H
+
+#include "zix/attributes.h"
+
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+   @defgroup zix_function_types Function Types
+   @ingroup zix
+   @{
+*/
+
+/// Function for comparing two elements
+typedef int (*ZixCompareFunc)(const void* a,
+                              const void* b,
+                              const void* user_data);
+
+/// Function to destroy an element
+typedef void (*ZixDestroyFunc)(void* ptr, const void* user_data);
+
+/**
+   @}
+*/
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* ZIX_FUNCTION_TYPES_H */