[PATCH ncns v1 1/2] chnet: Optimize `put_thread()` path

[Ammar Faizi <ammarfaizi2@gnuweeb.org>]

The `delete` call doesn't have to be protected by mutex. Move it
to the outside of the locked region to reduce the `put_thread()`
critical section time.

Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>
---
 chnet/chnet.cc | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/chnet/chnet.cc b/chnet/chnet.cc
index e6b4c64..ba3c076 100644
--- a/chnet/chnet.cc
+++ b/chnet/chnet.cc
@@ -746,10 +746,13 @@ static void put_thread(void *thread)
 	if (--th->ref_count_ == 0) {
 		if (g_thpool)
 			g_thpool[th->idx_] = nullptr;
-
-		delete th;
+	} else {
+		th = nullptr;
 	}
 	g_thpool_lock_.unlock();
+
+	if (th)
+		delete th;
 }
 
 static void init_g_ch_thpool(void)
-- 
Ammar Faizi