[PATCH] eal: introduce missing rte_thread wrappers

[David Vodak <vodak@cesnet.cz>]

Function rte_ctrl_thread_create has been replaced by rte_thread_create_control,
encouraging Linux users to switch from the pthread_t API to the rte_thread API.
However the rte_thread API does not provide wrappers for all pthread functions.
This commit introduces equivalent functions for pthread_timedjoin_np,
pthread_getname_np and pthread_cancel.

Bugzilla ID: 1330
---
 lib/eal/include/rte_thread.h | 49 ++++++++++++++++++++++++++++++++++++
 lib/eal/unix/rte_thread.c    | 20 +++++++++++++++
 lib/eal/version.map          |  3 +++
 3 files changed, 72 insertions(+)

diff --git a/lib/eal/include/rte_thread.h b/lib/eal/include/rte_thread.h
index 8da9d4d3fb..49a068eda7 100644
--- a/lib/eal/include/rte_thread.h
+++ b/lib/eal/include/rte_thread.h
@@ -463,6 +463,55 @@ int rte_thread_value_set(rte_thread_key key, const void *value);
  */
 void *rte_thread_value_get(rte_thread_key key);
 
+/**
+ * Try to join with a terminated thread. If thread has not yet terminated,
+ * then the call blocks until a maximum time, specified in abstime.
+ *
+ * @param thread_id
+ *   Id of the thread.
+ *
+ * @param retval
+ *   Exit status of the thread.
+ *
+ * @param abstime
+ *   Maximum time of call blocking, measured against the CLOCK_REALTIME clock.
+ *
+ * @return
+ *   On success, return 0.
+ *   On failure, return a positive errno-style error number.
+ */
+int rte_thread_timedjoin_np(rte_thread_t thread_id, void **retval, const struct timespec *abstime);
+
+/**
+ * Get name of the thread.
+ *
+ * @param thread_id
+ *   Id of the thread.
+ *
+ * @param name
+ *   Name of the thread.
+ *
+ * @param size
+ *   The number of bytes available in name.
+ *
+ * @return
+ *   On success, return 0.
+ *   On failure, return a positive errno-style error number.
+ */
+int rte_thread_getname_np(rte_thread_t thread_id, char name[], size_t size);
+
+/**
+ * Send a cancelation request to a thread.
+ *
+ * @param thread_id
+ *   Id of the thread.
+ *
+ * @return
+ *   On success, return 0.
+ *   On failure, return a positive errno-style error number.
+ */
+int rte_thread_cancel(rte_thread_t thread_id);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/eal/unix/rte_thread.c b/lib/eal/unix/rte_thread.c
index 36a21ab2f9..79986bee6a 100644
--- a/lib/eal/unix/rte_thread.c
+++ b/lib/eal/unix/rte_thread.c
@@ -378,3 +378,23 @@ rte_thread_get_affinity_by_id(rte_thread_t thread_id,
 	return pthread_getaffinity_np((pthread_t)thread_id.opaque_id,
 		sizeof(*cpuset), cpuset);
 }
+
+int
+rte_thread_timedjoin_np(rte_thread_t thread_id, void **retval,
+		const struct timespec *abstime)
+{
+	return pthread_timedjoin_np((pthread_t) thread_id.opaque_id, retval,
+		abstime);
+}
+
+int
+rte_thread_getname_np(rte_thread_t thread_id, char name[], size_t size)
+{
+	return pthread_getname_np((pthread_t) thread_id.opaque_id, name, size);
+}
+
+int
+rte_thread_cancel(rte_thread_t thread_id)
+{
+	return pthread_cancel((pthread_t) thread_id.opaque_id);
+}
diff --git a/lib/eal/version.map b/lib/eal/version.map
index 5e0cd47c82..66ac45b7de 100644
--- a/lib/eal/version.map
+++ b/lib/eal/version.map
@@ -310,6 +310,9 @@ DPDK_24 {
 	rte_thread_unregister;
 	rte_thread_value_get;
 	rte_thread_value_set;
+	rte_thread_timedjoin_np; # WINDOWS_NO_EXPORT
+	rte_thread_getname_np; # WINDOWS_NO_EXPORT
+	rte_thread_cancel; # WINDOWS_NO_EXPORT
 	rte_uuid_compare;
 	rte_uuid_is_null;
 	rte_uuid_parse;
-- 
2.43.0