From: Christian Brauner <christian.brauner@ubuntu.com>
Date: Thu, 18 Feb 2021 14:52:35 +0000 (+0100)
Subject: memory_utils: add close_equal() and free_equal()
X-Git-Tag: lxc-5.0.0~278^2~4
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=284868b249cd0f39ef4ef3cf2eb476b0b20ad29a;p=thirdparty%2Flxc.git

memory_utils: add close_equal() and free_equal()

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
---

diff --git a/src/lxc/memory_utils.h b/src/lxc/memory_utils.h
index bb7963c5f..fb9e1ae4e 100644
--- a/src/lxc/memory_utils.h
+++ b/src/lxc/memory_utils.h
@@ -95,4 +95,21 @@ static inline void *memdup(const void *data, size_t len)
 		(a) = move_fd((b)); \
 	})
 
+#define close_equal(a, b)             \
+	({                            \
+		if (a >= 0 && a != b) \
+			close(a);     \
+		if (close >= 0)       \
+			close(b);     \
+		a = b = -EBADF;       \
+	})
+
+#define free_equal(a, b)         \
+	({                       \
+		if (a != b)      \
+			free(a); \
+		free(b);         \
+		a = b = NULL;    \
+	})
+
 #endif /* __LXC_MEMORY_UTILS_H */