--- /dev/null
+/* $Id$ */
+
+/* messaging - Function related to messaging code specific to RL */
+
+/* Copyright (c) 2003-2005 Martin Quinson. All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+#include "xbt/ex.h"
+#include "gras/Msg/msg_private.h"
+
+#include "gras/DataDesc/datadesc_interface.h"
+#include "gras/Transport/transport_interface.h" /* gras_trp_send/recv */
+
+XBT_LOG_EXTERNAL_CATEGORY(gras_msg);
+XBT_LOG_DEFAULT_CATEGORY(gras_msg);
+
+void gras_msg_send_ext(gras_socket_t sock,
+ e_gras_msg_kind_t kind,
+ unsigned long int ID,
+ gras_msgtype_t msgtype,
+ void *payload) {
+
+ static gras_datadesc_type_t string_type=NULL;
+ static gras_datadesc_type_t ulong_type=NULL;
+ char c_kind=(char)kind;
+
+ xbt_assert0(msgtype,"Cannot send the NULL message");
+
+ if (!string_type) {
+ string_type = gras_datadesc_by_name("string");
+ xbt_assert(string_type);
+ }
+ if (!ulong_type) {
+ ulong_type = gras_datadesc_by_name("unsigned long int");
+ xbt_assert(ulong_type);
+ }
+
+ DEBUG3("send '%s' to %s:%d", msgtype->name,
+ gras_socket_peer_name(sock),gras_socket_peer_port(sock));
+ gras_trp_send(sock, _GRAS_header, 6, 1 /* stable */);
+ gras_trp_send(sock, &c_kind, 1, 1 /* stable */);
+ switch (kind) {
+ case e_gras_msg_kind_oneway:
+ break;
+
+ case e_gras_msg_kind_rpccall:
+ case e_gras_msg_kind_rpcanswer:
+ case e_gras_msg_kind_rpcerror:
+ gras_datadesc_send(sock,ulong_type,&ID);
+ break;
+
+ default:
+ THROW1(unknown_error,0,"Unknown msg kind %d",kind);
+ }
+
+ gras_datadesc_send(sock, string_type, &msgtype->name);
+ if (kind == e_gras_msg_kind_rpcerror) {
+ /* error on remote host, carfull, payload is an exception */
+ gras_datadesc_send(sock, gras_datadesc_by_name("ex_t"),payload);
+ } else if (kind == e_gras_msg_kind_rpcanswer) {
+ if (msgtype->answer_type)
+ gras_datadesc_send(sock, msgtype->answer_type, payload);
+ }else {
+ /* regular message */
+ if (msgtype->ctn_type)
+ gras_datadesc_send(sock, msgtype->ctn_type, payload);
+ }
+
+ gras_trp_flush(sock);
+}
+
+/*
+ * receive the next message on the given socket.
+ */
+void
+gras_msg_recv(gras_socket_t sock,
+ gras_msg_t msg) {
+
+ xbt_ex_t e;
+ static gras_datadesc_type_t string_type=NULL;
+ static gras_datadesc_type_t ulong_type=NULL;
+ char header[6];
+ int cpt;
+ int r_arch;
+ char *msg_name=NULL;
+ char c_kind;
+
+ xbt_assert1(!gras_socket_is_meas(sock),
+ "Asked to receive a message on the measurement socket %p", sock);
+ if (!string_type) {
+ string_type=gras_datadesc_by_name("string");
+ xbt_assert(string_type);
+ }
+ if (!ulong_type) {
+ ulong_type = gras_datadesc_by_name("unsigned long int");
+ xbt_assert(ulong_type);
+ }
+
+
+ TRY {
+ gras_trp_recv(sock, header, 6);
+ gras_trp_recv(sock, &c_kind, 1);
+ msg->kind=(e_gras_msg_kind_t)c_kind;
+ } CATCH(e) {
+ RETHROW0("Exception caught while trying to get the mesage header: %s");
+ }
+
+ for (cpt=0; cpt<4; cpt++)
+ if (header[cpt] != _GRAS_header[cpt])
+ THROW2(mismatch_error,0,
+ "Incoming bytes do not look like a GRAS message (header='%.4s' not '%.4s')",
+ header,_GRAS_header);
+ if (header[4] != _GRAS_header[4])
+ THROW2(mismatch_error,0,"GRAS protocol mismatch (got %d, use %d)",
+ (int)header[4], (int)_GRAS_header[4]);
+ r_arch = (int)header[5];
+ DEBUG2("Handle an incoming message using protocol %d (remote is %s)",
+ (int)header[4],gras_datadesc_arch_name(r_arch));
+
+ switch (msg->kind) {
+ case e_gras_msg_kind_oneway:
+ break;
+
+ case e_gras_msg_kind_rpccall:
+ case e_gras_msg_kind_rpcanswer:
+ case e_gras_msg_kind_rpcerror:
+ gras_datadesc_recv(sock,ulong_type,r_arch, &msg->ID);
+ break;
+
+ default:
+ THROW_IMPOSSIBLE;
+ }
+
+ gras_datadesc_recv(sock, string_type, r_arch, &msg_name);
+ TRY {
+ msg->type = (gras_msgtype_t)xbt_set_get_by_name(_gras_msgtype_set,msg_name);
+ } CATCH(e) {
+ /* FIXME: Survive unknown messages */
+ RETHROW1("Exception caught while retrieving the type associated to messages '%s' : %s",
+ msg_name);
+ }
+ free(msg_name);
+
+ if (msg->kind == e_gras_msg_kind_rpcerror) {
+ /* error on remote host. Carfull with that exception, eugene */
+ msg->payl_size=gras_datadesc_size(gras_datadesc_by_name("ex_t"));
+ msg->payl=xbt_malloc(msg->payl_size);
+ gras_datadesc_recv(sock, gras_datadesc_by_name("ex_t"), r_arch, msg->payl);
+
+ } else if (msg->kind == e_gras_msg_kind_rpcanswer) {
+ /* answer to RPC */
+ if (msg->type->answer_type) {
+ msg->payl_size=gras_datadesc_size(msg->type->answer_type);
+ xbt_assert2(msg->payl_size > 0,
+ "%s %s",
+ "Dynamic array as payload is forbided for now (FIXME?).",
+ "Reference to dynamic array is allowed.");
+ msg->payl = xbt_malloc(msg->payl_size);
+ gras_datadesc_recv(sock, msg->type->answer_type, r_arch, msg->payl);
+ } else {
+ msg->payl = NULL;
+ msg->payl_size = 0;
+ }
+ } else {
+ /* regular message */
+ if (msg->type->ctn_type) {
+ msg->payl_size=gras_datadesc_size(msg->type->ctn_type);
+ xbt_assert2(msg->payl_size > 0,
+ "%s %s",
+ "Dynamic array as payload is forbided for now (FIXME?).",
+ "Reference to dynamic array is allowed.");
+ msg->payl = xbt_malloc(msg->payl_size);
+ gras_datadesc_recv(sock, msg->type->ctn_type, r_arch, msg->payl);
+ } else {
+ msg->payl = NULL;
+ msg->payl_size = 0;
+ }
+ }
+}
