From 3955f151b1fab153de6b7a6310ec2f391ec2392e Mon Sep 17 00:00:00 2001
From: Willy Tarreau <w@1wt.eu>
Date: Mon, 31 Mar 2025 15:14:53 +0200
Subject: [PATCH] MINOR: cpu-set: compare two cpu sets with ha_cpuset_isequal()

This function returns true if two CPU sets are equal.
---
 include/haproxy/cpuset.h |  3 +++
 src/cpuset.c             | 14 ++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/include/haproxy/cpuset.h b/include/haproxy/cpuset.h
index 842f09f0d..14c669c25 100644
--- a/include/haproxy/cpuset.h
+++ b/include/haproxy/cpuset.h
@@ -44,6 +44,9 @@ int ha_cpuset_ffs(const struct hap_cpuset *set);
  */
 void ha_cpuset_assign(struct hap_cpuset *dst, struct hap_cpuset *src);
 
+/* returns true if the sets are equal */
+int ha_cpuset_isequal(const struct hap_cpuset *dst, const struct hap_cpuset *src);
+
 /* Returns the biggest index plus one usable on the platform.
  */
 int ha_cpuset_size(void);
diff --git a/src/cpuset.c b/src/cpuset.c
index 6b5c6d9ca..b102d11d1 100644
--- a/src/cpuset.c
+++ b/src/cpuset.c
@@ -134,6 +134,20 @@ void ha_cpuset_assign(struct hap_cpuset *dst, struct hap_cpuset *src)
 #endif
 }
 
+/* returns true if the sets are equal */
+int ha_cpuset_isequal(const struct hap_cpuset *dst, const struct hap_cpuset *src)
+{
+#if defined(CPUSET_USE_CPUSET)
+	return CPU_EQUAL(&dst->cpuset, &src->cpuset);
+
+#elif defined(CPUSET_USE_FREEBSD_CPUSET)
+	return !CPU_CMP(&src->cpuset, &dst->cpuset);
+
+#elif defined(CPUSET_USE_ULONG)
+	return dst->cpuset == src->cpuset;
+#endif
+}
+
 int ha_cpuset_size()
 {
 #if defined(CPUSET_USE_CPUSET) || defined(CPUSET_USE_FREEBSD_CPUSET)