Fixing communications in case of known size and processors

src/VCluster/VCluster.hpp

@@ -144,6 +144,7 @@ class Vcluster: public Vcluster_base
 			{
 				Vcluster_base::sendrecvMultipleMessagesNBX(prc_send.size(),(size_t *)send_sz_byte.getPointer(),(size_t *)prc_send.getPointer(),(void **)send_buf.getPointer(),
 											prc_recv.size(),(size_t *)prc_recv.getPointer(),msg_alloc_known,(void *)&bi);
+				sz_recv_byte = sz_recv_tmp;
 			}
 		}
 		else

src/VCluster/VCluster_semantic_unit_tests.hpp

@@ -782,6 +782,11 @@ BOOST_AUTO_TEST_CASE (Vcluster_semantic_sendrecv_receive_size_known)
 			prc_send.add((i + vcl.getProcessUnitID()) % vcl.getProcessingUnits());
 		}
 
+		// We receive to fill prc_recv2 and sz_recv2
+		vcl.SSendRecv(v1,v2,prc_send,prc_recv2,sz_recv2);
+
+		// We reset v2 and we receive again saying that the processors are known and we know the elements
+		v2.clear();
 		vcl.SSendRecv(v1,v2,prc_send,prc_recv2,sz_recv2,RECEIVE_KNOWN | KNOWN_ELEMENT_OR_BYTE);
 		vcl.SSendRecv(v1,v3,prc_send,prc_recv3,sz_recv3);
 
@@ -858,6 +863,14 @@ BOOST_AUTO_TEST_CASE (Vcluster_semantic_sendrecv_receive_known)
 			prc_send.add((i + vcl.getProcessUnitID()) % vcl.getProcessingUnits());
 		}
 
+		// Receive to fill prc_recv2
+		vcl.SSendRecv(v1,v2,prc_send,prc_recv2,sz_recv2);
+
+		// Reset v2 and sz_recv2
+
+		v2.clear();
+		sz_recv2.clear();
+
 		vcl.SSendRecv(v1,v2,prc_send,prc_recv2,sz_recv2,RECEIVE_KNOWN);
 		vcl.SSendRecv(v1,v3,prc_send,prc_recv3,sz_recv3);