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-rw-r--r--erts/emulator/beam/erl_driver.h9
-rw-r--r--erts/emulator/beam/erl_nif.c4
-rw-r--r--erts/emulator/beam/erl_nif.h30
-rw-r--r--erts/include/erl_int_sizes_config.h.in3
4 files changed, 44 insertions, 2 deletions
diff --git a/erts/emulator/beam/erl_driver.h b/erts/emulator/beam/erl_driver.h
index 316d0ef992..15a4f44a7d 100644
--- a/erts/emulator/beam/erl_driver.h
+++ b/erts/emulator/beam/erl_driver.h
@@ -48,6 +48,10 @@
# define SIZEOF_LONG_LONG_SAVED__ SIZEOF_LONG_LONG
# undef SIZEOF_LONG_LONG
#endif
+#ifdef HALFWORD_HEAP_EMULATOR
+# define HALFWORD_HEAP_EMULATOR_SAVED__ HALFWORD_HEAP_EMULATOR
+# undef HALFWORD_HEAP_EMULATOR
+#endif
#include "erl_int_sizes_config.h"
#if defined(SIZEOF_CHAR_SAVED__) && SIZEOF_CHAR_SAVED__ != SIZEOF_CHAR
# error SIZEOF_CHAR mismatch
@@ -65,6 +69,11 @@
# error SIZEOF_LONG_LONG mismatch
#endif
+/* This is OK to override by the NIF/driver implementor */
+#if defined(HALFWORD_HEAP_EMULATOR_SAVED__) && !defined(HALFWORD_HEAP_EMULATOR)
+#define HALFWORD_HEAP_EMULATOR HALFWORD_HEAP_EMULATOR_SAVED__
+#endif
+
#include "erl_drv_nif.h"
#include <stdlib.h>
diff --git a/erts/emulator/beam/erl_nif.c b/erts/emulator/beam/erl_nif.c
index f0c4d81f0b..41a9e17c86 100644
--- a/erts/emulator/beam/erl_nif.c
+++ b/erts/emulator/beam/erl_nif.c
@@ -512,9 +512,9 @@ int enif_get_int(ErlNifEnv* env, Eterm term, int* ip)
int enif_get_uint(ErlNifEnv* env, Eterm term, unsigned* ip)
{
-#if SIZEOF_LONG == ERTS_SIZEOF_ETERM
+#if SIZEOF_INT == ERTS_SIZEOF_ETERM
return term_to_Uint(term, (Uint*)ip);
-#elif SIZEOF_INT == ERTS_SIZEOF_ETERM
+#elif SIZEOF_LONG == ERTS_SIZEOF_ETERM
Uint i;
if (!term_to_Uint(term, &i) || i > UINT_MAX) {
return 0;
diff --git a/erts/emulator/beam/erl_nif.h b/erts/emulator/beam/erl_nif.h
index 1ccf00293e..d0f6424724 100644
--- a/erts/emulator/beam/erl_nif.h
+++ b/erts/emulator/beam/erl_nif.h
@@ -34,7 +34,37 @@
#include <stdlib.h>
+#ifdef SIZEOF_CHAR
+# define SIZEOF_CHAR_SAVED__ SIZEOF_CHAR
+# undef SIZEOF_CHAR
+#endif
+#ifdef SIZEOF_SHORT
+# define SIZEOF_SHORT_SAVED__ SIZEOF_SHORT
+# undef SIZEOF_SHORT
+#endif
+#ifdef SIZEOF_INT
+# define SIZEOF_INT_SAVED__ SIZEOF_INT
+# undef SIZEOF_INT
+#endif
+#ifdef SIZEOF_LONG
+# define SIZEOF_LONG_SAVED__ SIZEOF_LONG
+# undef SIZEOF_LONG
+#endif
+#ifdef SIZEOF_LONG_LONG
+# define SIZEOF_LONG_LONG_SAVED__ SIZEOF_LONG_LONG
+# undef SIZEOF_LONG_LONG
+#endif
+#ifdef HALFWORD_HEAP_EMULATOR
+# define HALFWORD_HEAP_EMULATOR_SAVED__ HALFWORD_HEAP_EMULATOR
+# undef HALFWORD_HEAP_EMULATOR
+#endif
+#include "erl_int_sizes_config.h"
+
+#ifdef HALFWORD_HEAP_EMULATOR
+typedef unsigned int ERL_NIF_TERM;
+#else
typedef unsigned long ERL_NIF_TERM;
+#endif
struct enif_environment_t;
typedef struct enif_environment_t ErlNifEnv;
diff --git a/erts/include/erl_int_sizes_config.h.in b/erts/include/erl_int_sizes_config.h.in
index ef49995732..a8a264686e 100644
--- a/erts/include/erl_int_sizes_config.h.in
+++ b/erts/include/erl_int_sizes_config.h.in
@@ -31,3 +31,6 @@
/* The number of bytes in a long long. */
#undef SIZEOF_LONG_LONG
+
+/* Define if building a halfword-heap 64bit emulator (needed for NIF's) */
+#undef HALFWORD_HEAP_EMULATOR