#include "gras/Msg/msg_private.h"
-//XBT_LOG_NEW_DEFAULT_SUBCATEGORY(gras_rpc,gras_msg,"RPCing");
-
xbt_set_t _gras_rpctype_set = NULL;
+xbt_dynar_t _gras_rpc_cancelled = NULL;
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(gras_rpc,gras_msg,"RPC mecanism");
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(gras_msg_rpc,gras_msg,"RPC mecanism");
/** @brief declare a new versionned RPC type of the given name and payloads
*
* @param name: name as it should be used for logging messages (must be uniq)
- * @param version: something like versionning symbol
- * @param payload: datadescription of the payload
+ * @param payload_request: datatype of request
+ * @param payload_answer: datatype of answer
*
* Registers a new RPC message to the GRAS mechanism. RPC are constituted of a pair
* of messages.
*
* @param name: name as it should be used for logging messages (must be uniq)
* @param version: something like versionning symbol
- * @param payload: datadescription of the payload
+ * @param payload_request: datatype of request
+ * @param payload_answer: datatype of answer
*
* Registers a new RPC message to the GRAS mechanism. RPC are constituted of a pair
* of messages.
unsigned long int ID= *(unsigned long int*)ctx;
int res = msg->ID == ID &&
(msg->kind == e_gras_msg_kind_rpcanswer || msg->kind == e_gras_msg_kind_rpcerror);
+ int cursor;
+ gras_msg_cb_ctx_t rpc_ctx;
+
DEBUG5("Filter a message of ID %lu, type '%s' and kind '%s'. Waiting for ID=%lu. %s",
msg->ID,msg->type->name,e_gras_msg_kind_names[msg->kind],ID,
res?"take it": "reject");
+
+ if (res && !_gras_rpc_cancelled)
+ return res;
+
+ /* Check whether it is an old answer to a message we already canceled */
+ xbt_dynar_foreach(_gras_rpc_cancelled,cursor,rpc_ctx) {
+ if (msg->ID == rpc_ctx->ID && msg->kind==e_gras_msg_kind_rpcanswer) {
+ VERB1("Got an answer to the already canceled (timeouted?) RPC %ld. Ignore it (leaking the payload!).",msg->ID);
+ xbt_dynar_cursor_rm (_gras_rpc_cancelled, &cursor);
+ return 1;
+ }
+ }
+
return res;
}
-/** @brief Conduct a RPC call
- *
- */
-void gras_msg_rpccall(gras_socket_t server,
- double timeOut,
- gras_msgtype_t msgtype,
- void *request, void *answer) {
+/** @brief Launch a RPC call, but do not block for the answer */
+gras_msg_cb_ctx_t
+gras_msg_rpc_async_call(gras_socket_t server,
+ double timeOut,
+ gras_msgtype_t msgtype,
+ void *request) {
+ gras_msg_cb_ctx_t ctx = xbt_new0(s_gras_msg_cb_ctx_t,1);
+
+ if (msgtype->ctn_type) {
+ xbt_assert1(request,
+ "RPC type '%s' convey a payload you must provide",
+ msgtype->name);
+ } else {
+ xbt_assert1(!request,
+ "No payload was declared for RPC type '%s'",
+ msgtype->name);
+ }
+
+ ctx->ID = last_msg_ID++;
+ ctx->expeditor = server;
+ ctx->msgtype=msgtype;
+ ctx->timeout=timeOut;
+
+ VERB4("Send to %s:%d a RPC of type '%s' (ID=%lu)",
+ gras_socket_peer_name(server),
+ gras_socket_peer_port(server),
+ msgtype->name,ctx->ID);
+
+ gras_msg_send_ext(server, e_gras_msg_kind_rpccall, ctx->ID, msgtype, request);
- unsigned long int msg_ID = last_msg_ID++;
+ return ctx;
+}
+
+/** @brief Wait teh answer of a RPC call previously launched asynchronously */
+void gras_msg_rpc_async_wait(gras_msg_cb_ctx_t ctx,
+ void *answer) {
+ xbt_ex_t e;
s_gras_msg_t received;
- DEBUG2("Send a RPC of type '%s' (ID=%lu)",msgtype->name,msg_ID);
+ if (ctx->msgtype->answer_type) {
+ xbt_assert1(answer,
+ "Answers to RPC '%s' convey a payload you must accept",
+ ctx->msgtype->name);
+ } else {
+ xbt_assert1(!answer,
+ "No payload was declared for answers to RPC '%s'",
+ ctx->msgtype->name);
+ }
- gras_msg_send_ext(server, e_gras_msg_kind_rpccall, msg_ID, msgtype, request);
- gras_msg_wait_ext(timeOut,
- msgtype, NULL, msgfilter_rpcID, &msg_ID,
- &received);
+ TRY {
+ /* The filter returns 1 when we eat an old RPC answer to something canceled */
+ do {
+ gras_msg_wait_ext(ctx->timeout,
+ ctx->msgtype, NULL, msgfilter_rpcID, &ctx->ID,
+ &received);
+ } while (received.ID != ctx->ID);
+
+ } CATCH(e) {
+ if (!_gras_rpc_cancelled)
+ _gras_rpc_cancelled = xbt_dynar_new(sizeof(ctx),NULL);
+ xbt_dynar_push(_gras_rpc_cancelled,&ctx);
+ INFO2("canceled RPC %ld pushed onto the stack (%s)",ctx->ID,ctx->msgtype->name);
+ RETHROW;
+ }
+
+ free(ctx);
if (received.kind == e_gras_msg_kind_rpcerror) {
- /* Damn. Got an exception. Extract it and revive it */
xbt_ex_t e;
- VERB0("Raise a remote exception");
memcpy(&e,received.payl,received.payl_size);
free(received.payl);
- memcpy((void*)&(__xbt_ex_ctx()->ctx_ex),&e,sizeof(xbt_ex_t));
+ VERB3("Raise a remote exception cat:%d comming from %s (%s)",
+ e.category, e.host, e.msg);
+ __xbt_ex_ctx()->ctx_ex.msg = e.msg;
+ __xbt_ex_ctx()->ctx_ex.category = e.category;
+ __xbt_ex_ctx()->ctx_ex.value = e.value;
+ __xbt_ex_ctx()->ctx_ex.remote = 1;
+ __xbt_ex_ctx()->ctx_ex.host = e.host;
+ __xbt_ex_ctx()->ctx_ex.procname = e.procname;
+ __xbt_ex_ctx()->ctx_ex.pid = e.pid;
+ __xbt_ex_ctx()->ctx_ex.file = e.file;
+ __xbt_ex_ctx()->ctx_ex.line = e.line;
+ __xbt_ex_ctx()->ctx_ex.func = e.func;
+ __xbt_ex_ctx()->ctx_ex.used = e.used;
+ __xbt_ex_ctx()->ctx_ex.bt_strings = e.bt_strings;
+ memset(&__xbt_ex_ctx()->ctx_ex.bt,0,
+ sizeof(__xbt_ex_ctx()->ctx_ex.bt));
DO_THROW(__xbt_ex_ctx()->ctx_ex);
-
}
memcpy(answer,received.payl,received.payl_size);
free(received.payl);
}
+/** @brief Conduct a RPC call */
+void gras_msg_rpccall(gras_socket_t server,
+ double timeout,
+ gras_msgtype_t msgtype,
+ void *request, void *answer) {
+
+ gras_msg_cb_ctx_t ctx;
+
+ ctx= gras_msg_rpc_async_call(server, timeout,msgtype,request);
+ gras_msg_rpc_async_wait(ctx, answer);
+}
+
/** @brief Return the result of a RPC call
*
*/
void gras_msg_rpcreturn(double timeOut,gras_msg_cb_ctx_t ctx,void *answer) {
- gras_msg_send_ext(ctx->expeditor, e_gras_msg_kind_rpcanswer, ctx->ID, ctx->msgtype, answer);
+ DEBUG5("Return to RPC '%s' from %s:%d (tOut=%f, payl=%p)",
+ ctx->msgtype->name,
+ gras_socket_peer_name(ctx->expeditor),gras_socket_peer_port(ctx->expeditor),
+ timeOut,answer);
+ gras_msg_send_ext(ctx->expeditor, e_gras_msg_kind_rpcanswer,
+ ctx->ID, ctx->msgtype, answer);
}
