Consolidate distribution entry state transitions

* Make connection_id part of the distribution handle as {ConnId, DistEntry}
  in order for BIFs to verify correct connection.
* Make distribution handle opaque to net_kernel.
* Remove some unsafe lockless reads of DistEntry.flags
* Change state ERTS_DE_STATE_EXITING to be more of an internal state that
  prevents erts from enqueue, encode or schedule new data to be sent. Otherwise
  it should behave like ERTS_DE_STATE_CONNECTED.

1 files changed, 2 insertions, 0 deletions

diff --git a/erts/emulator/beam/dist.h b/erts/emulator/beam/dist.h
index 30b4b35c20..75b59e5196 100644
--- a/erts/emulator/beam/dist.h
+++ b/erts/emulator/beam/dist.h
@@ -136,6 +136,7 @@ typedef struct {
     Eterm cid;
     Eterm connection_id;
     int no_suspend;
+    Uint32 flags;
 } ErtsDSigData;
 
 #define ERTS_DE_BUSY_LIMIT (1024*1024)
@@ -235,6 +236,7 @@ retry:
     dsdp->cid = dep->cid;
     dsdp->connection_id = dep->connection_id;
     dsdp->no_suspend = no_suspend;
+    dsdp->flags = dep->flags;
     if (dspl == ERTS_DSP_NO_LOCK)
 	erts_de_runlock(dep);
     return res;