From 4c97f6bddcc8ba836e26049db6949e88df75044c Mon Sep 17 00:00:00 2001
From: =?utf8?q?J=C3=A9r=C3=A9mie=20Galarneau?=
 <jeremie.galarneau@efficios.com>
Date: Tue, 12 Mar 2019 16:53:00 -0400
Subject: [PATCH] Add lttng_uuid_is_nil() util
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Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
---
 src/common/compat/uuid.c | 8 ++++++++
 src/common/compat/uuid.h | 3 +++
 2 files changed, 11 insertions(+)

diff --git a/src/common/compat/uuid.c b/src/common/compat/uuid.c
index 6d8993dd3..25dccbb83 100644
--- a/src/common/compat/uuid.c
+++ b/src/common/compat/uuid.c
@@ -18,6 +18,9 @@
 #include <stdio.h>
 #include <common/compat/uuid.h>
 #include <string.h>
+#include <stddef.h>
+
+static const lttng_uuid nil_uuid;
 
 void lttng_uuid_to_str(const lttng_uuid uuid, char *uuid_str)
 {
@@ -33,3 +36,8 @@ bool lttng_uuid_is_equal(const lttng_uuid a, const lttng_uuid b)
 {
 	return memcmp(a, b, (sizeof(lttng_uuid))) == 0;
 }
+
+bool lttng_uuid_is_nil(const lttng_uuid uuid)
+{
+	return memcmp(nil_uuid, uuid, sizeof(lttng_uuid)) == 0;
+}
diff --git a/src/common/compat/uuid.h b/src/common/compat/uuid.h
index e1e3c749d..ade7ef56d 100644
--- a/src/common/compat/uuid.h
+++ b/src/common/compat/uuid.h
@@ -82,4 +82,7 @@ void lttng_uuid_to_str(const lttng_uuid uuid, char *uuid_str);
 LTTNG_HIDDEN
 bool lttng_uuid_is_equal(const lttng_uuid a, const lttng_uuid b);
 
+LTTNG_HIDDEN
+bool lttng_uuid_is_nil(const lttng_uuid uuid);
+
 #endif /* LTTNG_UUID_H */
-- 
2.34.1