+++ /dev/null
-/* $Id$ */
-
-/* rpc - RPC implementation on top of GRAS messages */
-
-/* Copyright (c) 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 "gras_simix/Msg/gras_simix_msg_private.h"
-
-xbt_set_t _gras_rpctype_set = NULL;
-xbt_dynar_t _gras_rpc_cancelled = NULL;
-
-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 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.
- */
-void
-gras_msgtype_declare_rpc(const char *name,
- gras_datadesc_type_t payload_request,
- gras_datadesc_type_t payload_answer) {
-
- gras_msgtype_declare_ext(name, 0,
- e_gras_msg_kind_rpccall,
- payload_request, payload_answer);
-
-}
-
-/** @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_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.
- *
- * Use this version instead of gras_rpctype_declare when you change the
- * semantic or syntax of a message and want your programs to be able to deal
- * with both versions. Internally, each will be handled as an independent
- * message type, so you can register differents for each of them.
- */
-void
-gras_msgtype_declare_rpc_v(const char *name,
- short int version,
- gras_datadesc_type_t payload_request,
- gras_datadesc_type_t payload_answer) {
-
- gras_msgtype_declare_ext(name, version,
- e_gras_msg_kind_rpccall,
- payload_request, payload_answer);
-
-}
-
-static unsigned long int last_msg_ID = 0;
-
-static int msgfilter_rpcID(gras_msg_t msg, void* ctx) {
- 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;
-}
-
-/* Mallocator cruft */
-xbt_mallocator_t gras_msg_ctx_mallocator = NULL;
-void* gras_msg_ctx_mallocator_new_f(void) {
- return xbt_new0(s_gras_msg_cb_ctx_t,1);
-}
-void gras_msg_ctx_mallocator_free_f(void* ctx) {
- xbt_free(ctx);
-}
-void gras_msg_ctx_mallocator_reset_f(void* ctx) {
- memset(ctx, sizeof(s_gras_msg_cb_ctx_t),0);
-}
-
-/** @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_mallocator_get(gras_msg_ctx_mallocator);
-
- 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);
-
- return ctx;
-}
-
-/** @brief Wait the 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;
-
- 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);
- }
-
- 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);
- INFO5("canceled RPC %ld pushed onto the stack (%s from %s:%d) Reason: %s",
- ctx->ID,ctx->msgtype->name,
- gras_socket_peer_name(ctx->expeditor),gras_socket_peer_port(ctx->expeditor),
- e.msg);
- RETHROW;
- }
-
- xbt_mallocator_release(gras_msg_ctx_mallocator, ctx);
- if (received.kind == e_gras_msg_kind_rpcerror) {
- xbt_ex_t e;
- memcpy(&e,received.payl,received.payl_size);
- free(received.payl);
- 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
- *
- * It done before the actual return of the callback so that the callback can do
- * some cleanups before leaving.
- */
-
-void gras_msg_rpcreturn(double timeOut,gras_msg_cb_ctx_t ctx,void *answer) {
- xbt_assert0(ctx->answer_due,
- "RPC return not allowed here. Either not a RPC message or already returned a result");
- ctx->answer_due = 0;
- 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);
-}
-