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-rw-r--r--erts/emulator/beam/sys.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/erts/emulator/beam/sys.h b/erts/emulator/beam/sys.h
index 869a575cb4..a69da4d762 100644
--- a/erts/emulator/beam/sys.h
+++ b/erts/emulator/beam/sys.h
@@ -1291,4 +1291,13 @@ erts_raw_env_next_char(byte *p, int encoding)
#endif /* #if ERTS_GLB_INLINE_INCL_FUNC_DEF */
+/*
+ * Magic numbers for our driver port_control callbacks.
+ * Kept them below 1<<27 to not inflict extra bignum garbage on 32-bit.
+ */
+#define ERTS_TTYSL_DRV_CONTROL_MAGIC_NUMBER 0x018b0900U
+#define ERTS_INET_DRV_CONTROL_MAGIC_NUMBER 0x03f1a300U
+#define ERTS_SPAWN_DRV_CONTROL_MAGIC_NUMBER 0x04c76a00U
+#define ERTS_FORKER_DRV_CONTROL_MAGIC_NUMBER 0x050a7800U
+
#endif