[PATCH v4 3/6] eal: add basic rte thread ID equal API

[Tyler Retzlaff]

Add rte_thread_equal() that tests if two rte_thread_id are equal.

Signed-off-by: Narcisa Vasile <navasile at microsoft.com>
Signed-off-by: Tyler Retzlaff <roretzla at linux.microsoft.com>
Acked-by: Chengwen Feng <fengchengwen at huawei.com>
---
 lib/eal/include/rte_thread.h | 19 +++++++++++++++++++
 lib/eal/unix/rte_thread.c    |  6 ++++++
 lib/eal/version.map          |  1 +
 lib/eal/windows/rte_thread.c |  6 ++++++
 4 files changed, 32 insertions(+)

diff --git a/lib/eal/include/rte_thread.h b/lib/eal/include/rte_thread.h
index 3c8ff50..8359c1c 100644
--- a/lib/eal/include/rte_thread.h
+++ b/lib/eal/include/rte_thread.h
@@ -144,6 +144,25 @@ int rte_thread_create(rte_thread_t *thread_id,
 __rte_experimental
 rte_thread_t rte_thread_self(void);
 
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Check if 2 thread ids are equal.
+ *
+ * @param t1
+ *   First thread id.
+ *
+ * @param t2
+ *   Second thread id.
+ *
+ * @return
+ *   If the ids are equal, return nonzero.
+ *   Otherwise, return 0.
+ */
+__rte_experimental
+int rte_thread_equal(rte_thread_t t1, rte_thread_t t2);
+
 #ifdef RTE_HAS_CPUSET
 
 /**
diff --git a/lib/eal/unix/rte_thread.c b/lib/eal/unix/rte_thread.c
index d4c1a7f..37ebfcf 100644
--- a/lib/eal/unix/rte_thread.c
+++ b/lib/eal/unix/rte_thread.c
@@ -210,6 +210,12 @@ struct thread_routine_ctx {
 	return pthread_detach((pthread_t)thread_id.opaque_id);
 }
 
+int
+rte_thread_equal(rte_thread_t t1, rte_thread_t t2)
+{
+	return pthread_equal((pthread_t)t1.opaque_id, (pthread_t)t2.opaque_id);
+}
+
 rte_thread_t
 rte_thread_self(void)
 {
diff --git a/lib/eal/version.map b/lib/eal/version.map
index b404343..b5dc7f1 100644
--- a/lib/eal/version.map
+++ b/lib/eal/version.map
@@ -432,6 +432,7 @@ EXPERIMENTAL {
 	# added in 22.11
 	rte_thread_create;
 	rte_thread_detach;
+	rte_thread_equal;
 	rte_thread_join;
 };
 
diff --git a/lib/eal/windows/rte_thread.c b/lib/eal/windows/rte_thread.c
index ad71be4..1bc648e 100644
--- a/lib/eal/windows/rte_thread.c
+++ b/lib/eal/windows/rte_thread.c
@@ -287,6 +287,12 @@ struct thread_routine_ctx {
 	return 0;
 }
 
+int
+rte_thread_equal(rte_thread_t t1, rte_thread_t t2)
+{
+	return t1.opaque_id == t2.opaque_id;
+}
+
 rte_thread_t
 rte_thread_self(void)
 {
-- 
1.8.3.1