Add locks to transaction properties (#12)

* update pb-version

(old version no longer working with latest Erlang)

* add locks to transaction properties

Author: peterzeller

Makefile

@@ -25,7 +25,7 @@ lint:
 
 _build/gpb:
 	mkdir -p _build/
-	(cd _build/ && git clone https://github.com/tomas-abrahamsson/gpb && cd gpb && git checkout 4.4.0)
+	(cd _build/ && git clone https://github.com/tomas-abrahamsson/gpb && cd gpb && git checkout 4.10.2)
 
 _build/gpb/bin/protoc-erl: _build/gpb
 	(cd _build/gpb && make)

include/antidote_pb.hrl

@@ -138,7 +138,9 @@
 -define('APBTXNPROPERTIES_PB_H', true).
 -record('ApbTxnProperties',
         {read_write             :: non_neg_integer() | undefined, % = 1, 32 bits
-         red_blue               :: non_neg_integer() | undefined % = 2, 32 bits
+         red_blue               :: non_neg_integer() | undefined, % = 2, 32 bits
+         shared_locks = []      :: [iodata()] | undefined, % = 3
+         exclusive_locks = []   :: [iodata()] | undefined % = 4
         }).
 -endif.
 

proto/antidote.proto

@@ -140,6 +140,8 @@ message ApbOperationResp {
 message ApbTxnProperties {
     optional uint32 read_write = 1 ; //default = 0 = read_write, 1 = read_only, 2 = write_only
     optional uint32 red_blue = 2 ; // default = 0 = blue, 1 = red
+    repeated bytes shared_locks = 3;
+    repeated bytes exclusive_locks = 4;
 }
 
 // Object (Key) representation