lib: put __BT_UPCAST() and __BT_UPCAST_CONST() in `babeltrace.h`

[babeltrace.git] / include / babeltrace2 / babeltrace.h

diff --git a/include/babeltrace2/babeltrace.h b/include/babeltrace2/babeltrace.h
index 739e76b3b3a1b4ae142a995a94646df3d5cff4e3..b9ce9847ad191a8488758d26e81e4eed52538175 100644 (file)
--- a/include/babeltrace2/babeltrace.h
+++ b/include/babeltrace2/babeltrace.h
@@ -32,9 +32,18 @@
 # define __BT_IN_BABELTRACE_H
 #endif
 
-/* Need by some of the following included headers */
+/* Internal: needed by some of the following included headers */
 #include <babeltrace2/func-status.h>
 
+/* Internal: needed by some of the following included headers */
+#ifdef __cplusplus
+# define __BT_UPCAST(_type, _p)                static_cast<_type *>(static_cast<void *>(_p))
+# define __BT_UPCAST_CONST(_type, _p)  static_cast<const _type *>(static_cast<const void *>(_p))
+#else
+# define __BT_UPCAST(_type, _p)                ((_type *) (_p))
+# define __BT_UPCAST_CONST(_type, _p)  ((const _type *) (_p))
+#endif
+
 /* Core API */
 #include <babeltrace2/current-thread.h>
 #include <babeltrace2/error-cause-const.h>
@@ -157,5 +166,7 @@
 #undef __BT_FUNC_STATUS_UNSUPPORTED
 #undef __BT_FUNC_STATUS_CANCELED
 #undef __BT_IN_BABELTRACE_H
+#undef __BT_UPCAST
+#undef __BT_UPCAST_CONST
 
 #endif /* BABELTRACE2_BABELTRACE_H */