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-rw-r--r--erts/emulator/beam/erl_driver.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/erts/emulator/beam/erl_driver.h b/erts/emulator/beam/erl_driver.h
index e71b87803b..5f2115ef7f 100644
--- a/erts/emulator/beam/erl_driver.h
+++ b/erts/emulator/beam/erl_driver.h
@@ -163,6 +163,7 @@ typedef struct {
#define ERL_DRV_FLAG_USE_PORT_LOCKING (1 << 0)
#define ERL_DRV_FLAG_SOFT_BUSY (1 << 1)
#define ERL_DRV_FLAG_NO_BUSY_MSGQ (1 << 2)
+#define ERL_DRV_FLAG_USE_INIT_ACK (1 << 3)
/*
* Integer types
@@ -690,6 +691,9 @@ EXTERN char *driver_dl_error(void);
EXTERN int erl_drv_putenv(char *key, char *value);
EXTERN int erl_drv_getenv(char *key, char *value, size_t *value_size);
+/* spawn start init ack */
+EXTERN void erl_drv_init_ack(ErlDrvPort ix, ErlDrvData res);
+
#endif /* !ERL_DRIVER_TYPES_ONLY */
#ifdef WIN32_DYNAMIC_ERL_DRIVER