Introduce a helper responsible for initialising the per thread context.
We can then have a unified context for EAL and non-EAL threads and
remove copy/paste'd OS-specific helpers.

Per EAL thread CPU affinity setting is separated from the thread init.
It is to accommodate with Windows EAL where CPU affinity is not set at
the moment.
Besides, having affinity set by the master lcore in FreeBSD and Linux
will make it possible to detect errors rather than panic in the child
thread. But the cleanup when such an event happens is left for later.

Signed-off-by: David Marchand <redacted>
---
Changes since v1:
- rebased on master, removed Windows workarounds wrt gettid and traces
  support,

---
 lib/librte_eal/common/eal_common_thread.c | 51 +++++++++++++----------
 lib/librte_eal/common/eal_thread.h        |  8 ++--
 lib/librte_eal/freebsd/eal.c              | 14 ++++++-
 lib/librte_eal/freebsd/eal_thread.c       | 32 +-------------
 lib/librte_eal/linux/eal.c                | 15 ++++++-
 lib/librte_eal/linux/eal_thread.c         | 32 +-------------
 lib/librte_eal/windows/eal.c              |  3 +-
 lib/librte_eal/windows/eal_thread.c       | 10 +----
 8 files changed, 66 insertions(+), 99 deletions(-)

diff --git a/lib/librte_eal/common/eal_common_thread.c b/lib/librte_eal/common/eal_common_thread.c
index 280c64bb76..afb30236c5 100644
--- a/lib/librte_eal/common/eal_common_thread.c
+++ b/lib/librte_eal/common/eal_common_thread.c

@@ -71,20 +71,10 @@ eal_cpuset_socket_id(rte_cpuset_t *cpusetp)
 	return socket_id;
 }
 
-int
-rte_thread_set_affinity(rte_cpuset_t *cpusetp)
+static void
+thread_update_affinity(rte_cpuset_t *cpusetp)
 {
-	int s;
-	unsigned lcore_id;
-	pthread_t tid;
-
-	tid = pthread_self();
-
-	s = pthread_setaffinity_np(tid, sizeof(rte_cpuset_t), cpusetp);
-	if (s != 0) {
-		RTE_LOG(ERR, EAL, "pthread_setaffinity_np failed\n");
-		return -1;
-	}
+	unsigned int lcore_id = rte_lcore_id();
 
 	/* store socket_id in TLS for quick access */
 	RTE_PER_LCORE(_socket_id) =

@@ -94,14 +84,24 @@ rte_thread_set_affinity(rte_cpuset_t *cpusetp)
 	memmove(&RTE_PER_LCORE(_cpuset), cpusetp,
 		sizeof(rte_cpuset_t));
 
-	lcore_id = rte_lcore_id();
 	if (lcore_id != (unsigned)LCORE_ID_ANY) {
 		/* EAL thread will update lcore_config */
 		lcore_config[lcore_id].socket_id = RTE_PER_LCORE(_socket_id);
 		memmove(&lcore_config[lcore_id].cpuset, cpusetp,
 			sizeof(rte_cpuset_t));
 	}
+}
 
+int
+rte_thread_set_affinity(rte_cpuset_t *cpusetp)
+{
+	if (pthread_setaffinity_np(pthread_self(), sizeof(rte_cpuset_t),
+			cpusetp) != 0) {
+		RTE_LOG(ERR, EAL, "pthread_setaffinity_np failed\n");
+		return -1;
+	}
+
+	thread_update_affinity(cpusetp);
 	return 0;
 }
 

@@ -147,6 +147,19 @@ eal_thread_dump_affinity(char *str, unsigned size)
 	return ret;
 }
 
+void
+rte_thread_init(unsigned int lcore_id, rte_cpuset_t *cpuset)
+{
+	/* set the lcore ID in per-lcore memory area */
+	RTE_PER_LCORE(_lcore_id) = lcore_id;
+
+	/* acquire system unique id  */
+	rte_gettid();