Use new atomic API in runtime system

All uses of the old deprecated atomic API in the runtime system
have been replaced with the use of the new atomic API. In a lot of
places this change imply a relaxation of memory barriers used.

1 files changed, 5 insertions, 4 deletions

diff --git a/erts/emulator/beam/erl_db_util.c b/erts/emulator/beam/erl_db_util.c
index c3b074f782..f9896a60e6 100644
--- a/erts/emulator/beam/erl_db_util.c
+++ b/erts/emulator/beam/erl_db_util.c
@@ -491,7 +491,7 @@ erts_match_set_release_result(Process* c_p)
 
 /* The trace control word. */
 
-static erts_smp_atomic_t trace_control_word;
+static erts_smp_atomic32_t trace_control_word;
 
 /* This needs to be here, before the bif table... */
 
@@ -911,7 +911,7 @@ static void db_free_tmp_uncompressed(DbTerm* obj);
 
 BIF_RETTYPE db_get_trace_control_word_0(Process *p) 
 {
-    Uint32 tcw = (Uint32) erts_smp_atomic_read(&trace_control_word);
+    Uint32 tcw = (Uint32) erts_smp_atomic32_read_acqb(&trace_control_word);
     BIF_RET(erts_make_integer((Uint) tcw, p));
 }
 
@@ -924,7 +924,8 @@ BIF_RETTYPE db_set_trace_control_word_1(Process *p, Eterm new)
     if (val != ((Uint32)val))
 	BIF_ERROR(p, BADARG);
     
-    old_tcw = (Uint32) erts_smp_atomic_xchg(&trace_control_word, (erts_aint_t) val);
+    old_tcw = (Uint32) erts_smp_atomic32_xchg_relb(&trace_control_word,
+						   (erts_aint32_t) val);
     BIF_RET(erts_make_integer((Uint) old_tcw, p));
 }
 
@@ -1249,7 +1250,7 @@ void db_initialize_util(void){
 	  sizeof(DMCGuardBif), 
 	  (int (*)(const void *, const void *)) &cmp_guard_bif);
     match_pseudo_process_init();
-    erts_smp_atomic_init(&trace_control_word, 0);
+    erts_smp_atomic32_init_nob(&trace_control_word, 0);
 }