From 71344176135b6e140ebc7c107ffe40ff9c3f79ba Mon Sep 17 00:00:00 2001
From: Willy Tarreau <w@1wt.eu>
Date: Tue, 18 Jul 2023 17:14:10 +0200
Subject: [PATCH] MINOR: cpuset: add cpu_map_configured() to know if a cpu-map
 was found

Since we'll soon want to adjust the "thread-groups" degree of freedom
based on the presence of cpu-map, we first need to be able to detect
if cpu-map was used. This function scans all cpu-map sets to detect if
any is present, and returns true accordingly.
---
 include/haproxy/cpuset.h |  5 +++++
 src/cpuset.c             | 17 +++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/include/haproxy/cpuset.h b/include/haproxy/cpuset.h
index 2977b38fe..4f795f264 100644
--- a/include/haproxy/cpuset.h
+++ b/include/haproxy/cpuset.h
@@ -41,4 +41,9 @@ void ha_cpuset_assign(struct hap_cpuset *dst, struct hap_cpuset *src);
  */
 int ha_cpuset_size(void);
 
+/* Returns true if at least one cpu-map directive was configured, otherwise
+ * false.
+ */
+int cpu_map_configured(void);
+
 #endif /* _HAPROXY_CPUSET_H */
diff --git a/src/cpuset.c b/src/cpuset.c
index e789b23a9..76fad1fb2 100644
--- a/src/cpuset.c
+++ b/src/cpuset.c
@@ -118,3 +118,20 @@ int ha_cpuset_size()
 
 #endif
 }
+
+/* Returns true if at least one cpu-map directive was configured, otherwise
+ * false.
+ */
+int cpu_map_configured(void)
+{
+	int grp, thr;
+
+	for (grp = 0; grp < MAX_TGROUPS; grp++) {
+		if (ha_cpuset_count(&cpu_map[grp].proc))
+			return 1;
+		for (thr = 0; thr < MAX_THREADS_PER_GROUP; thr++)
+			if (ha_cpuset_count(&cpu_map[grp].thread[thr]))
+				return 1;
+	}
+	return 0;
+}