Merge branch 'lukas/erts/enif_make_reverse_list/OTP-9392' into major

* lukas/erts/enif_make_reverse_list/OTP-9392:
  Add version comment
  Rename enif_get_reverse_list to enif_make_reverse_list
  Remove extra allocated heap fragment
  Added enif_get_reverse_list to nif API

3 files changed, 27 insertions, 1 deletions

diff --git a/erts/emulator/beam/erl_nif.c b/erts/emulator/beam/erl_nif.c
index 68421b4387..aa6a024b35 100644
--- a/erts/emulator/beam/erl_nif.c
+++ b/erts/emulator/beam/erl_nif.c
@@ -1007,6 +1007,29 @@ void enif_system_info(ErlNifSysInfo *sip, size_t si_size)
     driver_system_info(sip, si_size);
 }
 
+int enif_make_reverse_list(ErlNifEnv* env, ERL_NIF_TERM term, ERL_NIF_TERM *list) {
+    Eterm *listptr, ret = NIL, *hp;
+
+    if (is_nil(term)) {
+	*list = term;
+        return 1;
+    }
+
+    ret = NIL;
+
+    while (is_not_nil(term)) {
+	if (is_not_list(term)) {
+	    return 0;
+	}
+	hp = alloc_heap(env, 2);
+	listptr = list_val(term);
+	ret = CONS(hp, CAR(listptr), ret);
+	term = CDR(listptr);
+    }
+    *list = ret;
+    return 1;
+}
+
 
 ErlNifMutex* enif_mutex_create(char *name) { return erl_drv_mutex_create(name); }
 void enif_mutex_destroy(ErlNifMutex *mtx) {  erl_drv_mutex_destroy(mtx); }
diff --git a/erts/emulator/beam/erl_nif.h b/erts/emulator/beam/erl_nif.h
index d028567faf..fea527f954 100644
--- a/erts/emulator/beam/erl_nif.h
+++ b/erts/emulator/beam/erl_nif.h
@@ -32,9 +32,10 @@
 ** 2.0: R14A
 ** 2.1: R14B02 "vm_variant"
 ** 2.2: R14B03 enif_is_exception
+** 2.3: R15 enif_make_reverse_list
 */
 #define ERL_NIF_MAJOR_VERSION 2
-#define ERL_NIF_MINOR_VERSION 2
+#define ERL_NIF_MINOR_VERSION 3
 
 #include <stdlib.h>
 
diff --git a/erts/emulator/beam/erl_nif_api_funcs.h b/erts/emulator/beam/erl_nif_api_funcs.h
index c991b61abe..4af9f61000 100644
--- a/erts/emulator/beam/erl_nif_api_funcs.h
+++ b/erts/emulator/beam/erl_nif_api_funcs.h
@@ -136,6 +136,7 @@ ERL_NIF_API_FUNC_DECL(ERL_NIF_TERM,enif_make_int64,(ErlNifEnv*, ErlNifSInt64));
 ERL_NIF_API_FUNC_DECL(ERL_NIF_TERM,enif_make_uint64,(ErlNifEnv*, ErlNifUInt64));
 #endif
 ERL_NIF_API_FUNC_DECL(int,enif_is_exception,(ErlNifEnv*, ERL_NIF_TERM term));
+ERL_NIF_API_FUNC_DECL(int,enif_make_reverse_list,(ErlNifEnv*, ERL_NIF_TERM term, ERL_NIF_TERM *list));
 
 /*
 ** Add new entries here to keep compatibility on Windows!!!
@@ -256,6 +257,7 @@ ERL_NIF_API_FUNC_DECL(int,enif_is_exception,(ErlNifEnv*, ERL_NIF_TERM term));
 #endif
 
 #  define enif_is_exception ERL_NIF_API_FUNC_MACRO(enif_is_exception)
+#  define enif_make_reverse_list ERL_NIF_API_FUNC_MACRO(enif_make_reverse_list)
 
 /*
 ** Add new entries here