DRTVWR-476: Cherry-pick debug aids from commit 77b0c53 (fiber-mutex)

1 files changed, 42 insertions, 0 deletions

diff --git a/indra/test/print.h b/indra/test/print.h
new file mode 100644
index 0000000000..08e36caddf
--- /dev/null
+++ b/indra/test/print.h
@@ -0,0 +1,42 @@
+/**
+ * @file   print.h
+ * @author Nat Goodspeed
+ * @date   2020-01-02
+ * @brief  print() function for debugging
+ * 
+ * $LicenseInfo:firstyear=2020&license=viewerlgpl$
+ * Copyright (c) 2020, Linden Research, Inc.
+ * $/LicenseInfo$
+ */
+
+#if ! defined(LL_PRINT_H)
+#define LL_PRINT_H
+
+#include <iostream>
+
+// print(..., NONL);
+// leaves the output dangling, suppressing the normally appended std::endl
+struct NONL_t {};
+#define NONL (NONL_t())
+
+// normal recursion end
+inline
+void print()
+{
+    std::cerr << std::endl;
+}
+
+// print(NONL) is a no-op
+inline
+void print(NONL_t)
+{
+}
+
+template <typename T, typename... ARGS>
+void print(T&& first, ARGS&&... rest)
+{
+    std::cerr << first;
+    print(std::forward<ARGS>(rest)...);
+}
+
+#endif /* ! defined(LL_PRINT_H) */