MEDIUM: threads: Use the new _HA_ATOMIC_* macros.

Use the new _HA_ATOMIC_* macros and add barriers where needed.
diff --git a/src/haproxy.c b/src/haproxy.c
index b98d1f1..781d962 100644
--- a/src/haproxy.c
+++ b/src/haproxy.c
@@ -2739,11 +2739,11 @@
 		else if (signal_queue_len && tid == 0)
 			activity[tid].wake_signal++;
 		else {
-			HA_ATOMIC_OR(&sleeping_thread_mask, tid_bit);
-			__ha_barrier_store();
+			_HA_ATOMIC_OR(&sleeping_thread_mask, tid_bit);
+			__ha_barrier_atomic_store();
 			if (active_tasks_mask & tid_bit) {
 				activity[tid].wake_tasks++;
-				HA_ATOMIC_AND(&sleeping_thread_mask, ~tid_bit);
+				_HA_ATOMIC_AND(&sleeping_thread_mask, ~tid_bit);
 			} else
 				exp = next;
 		}
@@ -2751,7 +2751,7 @@
 		/* The poller will ensure it returns around <next> */
 		cur_poller.poll(&cur_poller, exp);
 		if (sleeping_thread_mask & tid_bit)
-			HA_ATOMIC_AND(&sleeping_thread_mask, ~tid_bit);
+			_HA_ATOMIC_AND(&sleeping_thread_mask, ~tid_bit);
 		fd_process_cached_events();
 
 		activity[tid].loops++;
@@ -2787,7 +2787,7 @@
 		ptdf->fct();
 
 #ifdef USE_THREAD
-	HA_ATOMIC_AND(&all_threads_mask, ~tid_bit);
+	_HA_ATOMIC_AND(&all_threads_mask, ~tid_bit);
 	if (tid > 0)
 		pthread_exit(NULL);
 #endif
diff --git a/src/hathreads.c b/src/hathreads.c
index 3077e49..1826f92 100644
--- a/src/hathreads.c
+++ b/src/hathreads.c
@@ -46,7 +46,7 @@
  */
 void thread_harmless_till_end()
 {
-		HA_ATOMIC_OR(&threads_harmless_mask, tid_bit);
+		_HA_ATOMIC_OR(&threads_harmless_mask, tid_bit);
 		while (threads_want_rdv_mask & all_threads_mask) {
 #if _POSIX_PRIORITY_SCHEDULING
 			sched_yield();
@@ -65,16 +65,16 @@
 {
 	unsigned long old;
 
-	HA_ATOMIC_OR(&threads_harmless_mask, tid_bit);
-	__ha_barrier_store();
-	HA_ATOMIC_OR(&threads_want_rdv_mask, tid_bit);
+	_HA_ATOMIC_OR(&threads_harmless_mask, tid_bit);
+	__ha_barrier_atomic_store();
+	_HA_ATOMIC_OR(&threads_want_rdv_mask, tid_bit);
 
 	/* wait for all threads to become harmless */
 	old = threads_harmless_mask;
 	while (1) {
 		if (unlikely((old & all_threads_mask) != all_threads_mask))
 			old = threads_harmless_mask;
-		else if (HA_ATOMIC_CAS(&threads_harmless_mask, &old, old & ~tid_bit))
+		else if (_HA_ATOMIC_CAS(&threads_harmless_mask, &old, old & ~tid_bit))
 			break;
 
 #if _POSIX_PRIORITY_SCHEDULING
@@ -95,7 +95,7 @@
  */
 void thread_release()
 {
-	HA_ATOMIC_AND(&threads_want_rdv_mask, ~tid_bit);
+	_HA_ATOMIC_AND(&threads_want_rdv_mask, ~tid_bit);
 	thread_harmless_end();
 }