From 23ed167e8963e77526ba0515d188c653cd45ca34 Mon Sep 17 00:00:00 2001
From: Simon Marchi <simon.marchi@efficios.com>
Date: Sat, 28 May 2022 14:18:17 -0400
Subject: [PATCH] cpp-common: add FileUP

Add a unique_ptr type to manage the lifetime of a `FILE *`, with a
custom deleter that calls fclose.

Change-Id: Idded4546d2a709cd0652975ef83c3ad6a0f511bc
Signed-off-by: Simon Marchi <simon.marchi@efficios.com>
Reviewed-on: https://review.lttng.org/c/babeltrace/+/8172
Reviewed-by: Philippe Proulx <eeppeliteloop@gmail.com>
Reviewed-on: https://review.lttng.org/c/babeltrace/+/10843
Tested-by: jenkins <jenkins@lttng.org>
CI-Build: Philippe Proulx <eeppeliteloop@gmail.com>
---
 src/cpp-common/Makefile.am |  3 ++-
 src/cpp-common/libc-up.hpp | 30 ++++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+), 1 deletion(-)
 create mode 100644 src/cpp-common/libc-up.hpp

diff --git a/src/cpp-common/Makefile.am b/src/cpp-common/Makefile.am
index 62e5aff4..13f31e73 100644
--- a/src/cpp-common/Makefile.am
+++ b/src/cpp-common/Makefile.am
@@ -21,4 +21,5 @@ EXTRA_DIST = bt2 \
 	vector.hpp \
 	std-int.hpp \
 	read-fixed-len-int.hpp \
-	glib-up.hpp
+	glib-up.hpp \
+	libc-up.hpp
diff --git a/src/cpp-common/libc-up.hpp b/src/cpp-common/libc-up.hpp
new file mode 100644
index 00000000..c53a39a5
--- /dev/null
+++ b/src/cpp-common/libc-up.hpp
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2022 EfficiOS, inc.
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#ifndef BABELTRACE_CPP_COMMON_LIBC_UP_HPP
+#define BABELTRACE_CPP_COMMON_LIBC_UP_HPP
+
+#include <cstdio>
+#include <memory>
+
+namespace bt2_common {
+namespace internal {
+
+struct FileCloserDeleter
+{
+    void operator()(std::FILE * const f) noexcept
+    {
+        std::fclose(f);
+    }
+};
+
+} /* namespace internal */
+
+using FileUP = std::unique_ptr<std::FILE, internal::FileCloserDeleter>;
+
+} /* namespace bt2_common */
+
+#endif /* BABELTRACE_CPP_COMMON_LIBC_UP_HPP */
-- 
2.34.1