X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/ffdfad0dab5d005809b7732310c0ced8e4d393e1..5a3c64d7f437f3e64f52752b8ab2a40d04705bca:/src/gras/Msg/msg.c diff --git a/src/gras/Msg/msg.c b/src/gras/Msg/msg.c index 077f51c215..ec047a4eee 100644 --- a/src/gras/Msg/msg.c +++ b/src/gras/Msg/msg.c @@ -2,60 +2,99 @@ /* messaging - Function related to messaging (code shared between RL and SG)*/ -/* Authors: Martin Quinson */ -/* Copyright (C) 2003 the OURAGAN project. */ +/* Copyright (c) 2003, 2004 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. */ + * under the terms of the license (GNU LGPL) which comes with this package. */ -#include "Msg/msg_private.h" +#include "xbt/ex.h" +#include "xbt/ex_interface.h" +#include "gras/Msg/msg_private.h" +#include "gras/Virtu/virtu_interface.h" +#include "gras/DataDesc/datadesc_interface.h" +#include "gras/Transport/transport_interface.h" /* gras_select */ +#include "portable.h" /* execinfo when available to propagate exceptions */ -GRAS_LOG_NEW_DEFAULT_SUBCATEGORY(msg,GRAS); +#ifndef MIN +#define MIN(a,b) ((a) < (b) ? (a) : (b)) +#endif -gras_set_t *_gras_msgtype_set = NULL; -static char GRAS_header[6]; +XBT_LOG_NEW_DEFAULT_SUBCATEGORY(gras_msg,gras,"High level messaging"); + +xbt_set_t _gras_msgtype_set = NULL; static char *make_namev(const char *name, short int ver); +char _GRAS_header[6]; +const char *e_gras_msg_kind_names[e_gras_msg_kind_count]= + {"UNKNOWN","ONEWAY","RPC call","RPC answer","RPC error"}; -/** - * gras_msg_init: - * +/* + * Creating procdata for this module + */ +static void *gras_msg_procdata_new() { + gras_msg_procdata_t res = xbt_new(s_gras_msg_procdata_t,1); + + res->name = xbt_strdup("gras_msg"); + res->name_len = 0; + res->msg_queue = xbt_dynar_new(sizeof(s_gras_msg_t), NULL); + res->cbl_list = xbt_dynar_new(sizeof(gras_cblist_t *),gras_cbl_free); + res->timers = xbt_dynar_new(sizeof(s_gras_timer_t), NULL); + + return (void*)res; +} + +/* + * Freeing procdata for this module + */ +static void gras_msg_procdata_free(void *data) { + gras_msg_procdata_t res = (gras_msg_procdata_t)data; + + xbt_dynar_free(&( res->msg_queue )); + xbt_dynar_free(&( res->cbl_list )); + xbt_dynar_free(&( res->timers )); + + free(res->name); + free(res); +} + +/* + * Module registration + */ +int gras_msg_libdata_id; +void gras_msg_register() { + gras_msg_libdata_id = gras_procdata_add("gras_msg",gras_msg_procdata_new, gras_msg_procdata_free); +} + +/* * Initialize this submodule. */ void gras_msg_init(void) { - gras_error_t errcode; - /* only initialize once */ if (_gras_msgtype_set != NULL) return; VERB0("Initializing Msg"); - TRYFAIL(gras_set_new(&_gras_msgtype_set)); + _gras_msgtype_set = xbt_set_new(); - memcpy(GRAS_header,"GRAS", 4); - GRAS_header[4]=GRAS_PROTOCOL_VERSION; - GRAS_header[5]=(char)GRAS_THISARCH; + memcpy(_GRAS_header,"GRAS", 4); + _GRAS_header[4]=GRAS_PROTOCOL_VERSION; + _GRAS_header[5]=(char)GRAS_THISARCH; } -/** - * gras_msg_exit: - * +/* * Finalize the msg module - **/ + */ void gras_msg_exit(void) { VERB0("Exiting Msg"); - gras_set_free(&_gras_msgtype_set); - _gras_msgtype_set = NULL; + xbt_set_free(&_gras_msgtype_set); } -/** - * gras_msgtype_free: - * +/* * Reclamed memory */ void gras_msgtype_free(void *t) { - gras_msgtype_t *msgtype=(gras_msgtype_t *)t; + gras_msgtype_t msgtype=(gras_msgtype_t)t; if (msgtype) { free(msgtype->name); free(msgtype); @@ -69,322 +108,569 @@ void gras_msgtype_free(void *t) { * the name unchanged. Pay attention to this before free'ing the result. */ static char *make_namev(const char *name, short int ver) { - char *namev=malloc(strlen(name)+2+3+1); + char *namev; if (!ver) return (char *)name; - if (namev) { + namev = (char*)xbt_malloc(strlen(name)+2+3+1); + + if (namev) sprintf(namev,"%s_v%d",name,ver); - } + return namev; } -/** - * gras_msgtype_declare: - * @name: name as it should be used for logging messages (must be uniq) - * @payload: datadescription of the payload +/* Internal function doing the crude work of registering messages */ +void +gras_msgtype_declare_ext(const char *name, + short int version, + e_gras_msg_kind_t kind, + gras_datadesc_type_t payload_request, + gras_datadesc_type_t payload_answer) { + + gras_msgtype_t msgtype=NULL; + char *namev=make_namev(name,version); + volatile int found = 0; + xbt_ex_t e; + + TRY { + msgtype = (gras_msgtype_t)xbt_set_get_by_name(_gras_msgtype_set,namev); + found = 1; + } CATCH(e) { + if (e.category != not_found_error) + RETHROW; + xbt_ex_free(e); + } + + if (found) { + VERB2("Re-register version %d of message '%s' (same kind & payload, ignored).", + version, name); + xbt_assert3(msgtype->kind == kind, + "Message %s re-registered as a %s (it was known as a %s)", + namev,e_gras_msg_kind_names[kind],e_gras_msg_kind_names[msgtype->kind]); + xbt_assert3(!gras_datadesc_type_cmp(msgtype->ctn_type, payload_request), + "Message %s re-registred with another payload (%s was %s)", + namev,gras_datadesc_get_name(payload_request), + gras_datadesc_get_name(msgtype->ctn_type)); + + xbt_assert3(!gras_datadesc_type_cmp(msgtype->answer_type, payload_answer), + "Message %s re-registred with another answer payload (%s was %s)", + namev,gras_datadesc_get_name(payload_answer), + gras_datadesc_get_name(msgtype->answer_type)); + + return ; /* do really ignore it */ + + } + + VERB4("Register version %d of message '%s' " + "(payload: %s; answer payload: %s).", + version, name, gras_datadesc_get_name(payload_request), + gras_datadesc_get_name(payload_answer)); + + msgtype = xbt_new(s_gras_msgtype_t,1); + msgtype->name = (namev == name ? strdup(name) : namev); + msgtype->name_len = strlen(namev); + msgtype->version = version; + msgtype->kind = kind; + msgtype->ctn_type = payload_request; + msgtype->answer_type = payload_answer; + + xbt_set_add(_gras_msgtype_set, (xbt_set_elm_t)msgtype, + &gras_msgtype_free); +} + + +/** @brief declare a new message type of the given name. It only accepts the given datadesc as payload * - * Registers a message to the GRAS mecanism. + * @param name: name as it should be used for logging messages (must be uniq) + * @param payload: datadescription of the payload */ -gras_error_t -gras_msgtype_declare(const char *name, - gras_datadesc_type_t *payload, - gras_msgtype_t **dst) { - return gras_msgtype_declare_v(name, 0, payload, dst); +void gras_msgtype_declare(const char *name, + gras_datadesc_type_t payload) { + gras_msgtype_declare_ext(name, 0, e_gras_msg_kind_oneway, payload, NULL); } -/** - * gras_msgtype_declare_v: - * @name: name as it should be used for logging messages (must be uniq) - * @version: something like versionning symbol - * @payload: datadescription of the payload + + +/** @brief declare a new versionned message type of the given name and payload + * + * @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 * - * Registers a message to the GRAS mecanism. Use this version instead of + * Registers a message to the GRAS mechanism. Use this version instead of * gras_msgtype_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. */ -gras_error_t -gras_msgtype_declare_v(const char *name, - short int version, - gras_datadesc_type_t *payload, - gras_msgtype_t **dst) { +void +gras_msgtype_declare_v(const char *name, + short int version, + gras_datadesc_type_t payload) { - gras_error_t errcode; - gras_msgtype_t *msgtype; - char *namev=make_namev(name,version); - - if (!namev) - RAISE_MALLOC; - - errcode = gras_set_get_by_name(_gras_msgtype_set, - namev,(gras_set_elm_t**)&msgtype); - if (errcode == mismatch_error) { - /* create type */ - if (! (msgtype = malloc(sizeof(gras_msgtype_t))) ) - RAISE_MALLOC; - - msgtype->name = (namev == name ? strdup(name) : namev); - msgtype->name_len = strlen(namev); - msgtype->version = version; - msgtype->ctn_type = payload; - - TRY(gras_set_add(_gras_msgtype_set, (gras_set_elm_t*)msgtype, - &gras_msgtype_free)); - - DEBUG2("Register version %d of message '%s'.", version, name); - } else if (errcode == no_error) { /* found */ - if (namev != name) - free(namev); - - gras_assert1(!gras_datadesc_type_cmp(msgtype->ctn_type, payload), - "Message %s registred again with a different payload", - namev); - } else { - if (namev != name) - free(namev); - return errcode; /* Error is set lookup */ - } - - return no_error; + gras_msgtype_declare_ext(name, version, + e_gras_msg_kind_oneway, payload, NULL); } -/** - * gras_msgtype_by_name: - * - * Retrieve a datatype description from its name - */ -gras_error_t -gras_msgtype_by_name (const char *name, - gras_msgtype_t **dst) { - return gras_msgtype_by_namev(name,0,dst); +/** @brief retrieve an existing message type from its name. */ +gras_msgtype_t gras_msgtype_by_name (const char *name) { + return gras_msgtype_by_namev(name,0); } -/** - * gras_msgtype_by_namev: - * - * Retrieve a datatype description from its name and version - */ -gras_error_t -gras_msgtype_by_namev(const char *name, - short int version, - gras_msgtype_t **dst) { - gras_error_t errcode; +/** @brief retrieve an existing message type from its name and version. */ +gras_msgtype_t gras_msgtype_by_namev(const char *name, + short int version) { + gras_msgtype_t res = NULL; char *namev = make_namev(name,version); + xbt_ex_t e; - TRY(gras_set_get_by_name(_gras_msgtype_set, namev, - (gras_set_elm_t**)dst)); + TRY { + res = (gras_msgtype_t)xbt_set_get_by_name(_gras_msgtype_set, namev); + } CATCH(e) { + xbt_ex_free(e); + THROW1(not_found_error,0,"No registred message of that name: %s",name); + } if (name != namev) free(namev); - - return no_error; + + return res; +} +/** @brief retrieve an existing message type from its name and version. */ +gras_msgtype_t gras_msgtype_by_id(int id) { + return (gras_msgtype_t)xbt_set_get_by_id(_gras_msgtype_set, id); } -/** - * gras_msg_send: +/** \brief Waits for a message to come in over a given socket. * - * Send the given message on the given socket + * @param timeout: How long should we wait for this message. + * @param msgt_want: type of awaited msg (or NULL if I'm enclined to accept any message) + * @param expe_want: awaited expeditot (match on hostname, not port; NULL if not relevant) + * @param filter: function returning true or false when passed a payload. Messages for which it returns false are not selected. (NULL if not relevant) + * @param filter_ctx: context passed as second argument of the filter (a pattern to match?) + * @param[out] msg_got: where to write the message we got + * + * Every message of another type received before the one waited will be queued + * and used by subsequent call to this function or gras_msg_handle(). */ -gras_error_t -gras_msg_send(gras_socket_t *sock, - gras_msgtype_t *msgtype, - void *payload) { - gras_error_t errcode; - static gras_datadesc_type_t *string_type=NULL; - if (!string_type) { - string_type = gras_datadesc_by_name("string"); - gras_assert(string_type); +void +gras_msg_wait_ext(double timeout, + + gras_msgtype_t msgt_want, + gras_socket_t expe_want, + gras_msg_filter_t filter, + void *filter_ctx, + + gras_msg_t msg_got) { + + s_gras_msg_t msg; + double start, now; + gras_msg_procdata_t pd=(gras_msg_procdata_t)gras_libdata_by_id(gras_msg_libdata_id); + int cpt; + + xbt_assert0(msg_got,"msg_got is an output parameter"); + + VERB1("Waiting for message '%s'",msgt_want?msgt_want->name:"(any)"); + + start = now = gras_os_time(); + + xbt_dynar_foreach(pd->msg_queue,cpt,msg){ + if ( ( !msgt_want || (msg.type->code == msgt_want->code)) + && (!expe_want || (!strcmp( gras_socket_peer_name(msg.expe), + gras_socket_peer_name(expe_want)))) + && (!filter || filter(&msg,filter_ctx))) { + + memcpy(msg_got,&msg,sizeof(s_gras_msg_t)); + xbt_dynar_cursor_rm(pd->msg_queue, &cpt); + VERB0("The waited message was queued"); + return; + } } - - TRY(gras_trp_chunk_send(sock, GRAS_header, 6)); - TRY(gras_datadesc_send(sock, string_type, msgtype->name)); - TRY(gras_datadesc_send(sock, msgtype->ctn_type, payload)); + while (1) { + memset(&msg,sizeof(msg),0); + + msg.expe = gras_trp_select(timeout ? timeout - now + start : 0); + gras_msg_recv(msg.expe, &msg); + DEBUG0("Got a message from the socket"); + + if ( ( !msgt_want || (msg.type->code == msgt_want->code)) + && (!expe_want || (!strcmp( gras_socket_peer_name(msg.expe), + gras_socket_peer_name(expe_want)))) + && (!filter || filter(&msg,filter_ctx))) { + + memcpy(msg_got,&msg,sizeof(s_gras_msg_t)); + DEBUG0("Message matches expectations. Use it."); + return; + } + DEBUG0("Message does not match expectations. Queue it."); + + /* not expected msg type. Queue it for later */ + xbt_dynar_push(pd->msg_queue,&msg); + + now=gras_os_time(); + if (now - start + 0.001 > timeout) { + THROW1(timeout_error, now-start+0.001-timeout, + "Timeout while waiting for msg '%s'", + msgt_want?msgt_want->name:"(any)"); + } + } - return no_error; + THROW_IMPOSSIBLE; } -/** - * gras_msg_recv: +/** \brief Waits for a message to come in over a given socket. + * + * @param timeout: How long should we wait for this message. + * @param msgt_want: type of awaited msg + * @param[out] expeditor: where to create a socket to answer the incomming message + * @param[out] payload: where to write the payload of the incomming message + * @return the error code (or no_error). * - * receive the next message on the given socket (which should be dropped - * when the function returns an error) + * Every message of another type received before the one waited will be queued + * and used by subsequent call to this function or gras_msg_handle(). */ -gras_error_t -gras_msg_recv(gras_socket_t *sock, - gras_msgtype_t **msgtype, - void **payload) { - - gras_error_t errcode; - static gras_datadesc_type_t *string_type=NULL; - char header[6]; - int cpt; - int r_arch; - char *msg_name; +void +gras_msg_wait(double timeout, + gras_msgtype_t msgt_want, + gras_socket_t *expeditor, + void *payload) { + s_gras_msg_t msg; + + gras_msg_wait_ext(timeout, + msgt_want, NULL, NULL, NULL, + &msg); + + if (msgt_want->ctn_type) { + xbt_assert1(payload, + "Message type '%s' convey a payload you must accept", + msgt_want->name); + } else { + xbt_assert1(!payload, + "No payload was declared for message type '%s'", + msgt_want->name); + } - if (!string_type) { - string_type=gras_datadesc_by_name("string"); - gras_assert(string_type); + if (payload) { + memcpy(payload,msg.payl,msg.payl_size); + free(msg.payl); } - - TRY(gras_trp_chunk_recv(sock, header, 6)); - for (cpt=0; cpt<4; cpt++) - if (header[cpt] != GRAS_header[cpt]) - RAISE0(mismatch_error,"Incoming bytes do not look like a GRAS message"); - if (header[4] != GRAS_header[4]) - RAISE2(mismatch_error,"GRAS protocol mismatch (got %d, use %d)", - (int)header[4], (int)GRAS_header[4]); - r_arch = (int)header[5]; - - TRY(gras_datadesc_recv(sock, string_type, r_arch,(void**) &msg_name)); - TRY(gras_set_get_by_name(_gras_msgtype_set, - msg_name,(gras_set_elm_t**)msgtype)); - TRY(gras_datadesc_recv(sock, (*msgtype)->ctn_type, r_arch, payload)); - - return no_error; + + if (expeditor) + *expeditor = msg.expe; } -/** - * gras_msg_wait: - * @timeout: How long should we wait for this message. - * @id: id of awaited msg - * @Returns: the error code (or no_error). +static int gras_msg_wait_or_filter(gras_msg_t msg, void *ctx) { + xbt_dynar_t dyn=(xbt_dynar_t)ctx; + int res = xbt_dynar_member(dyn,msg->type); + if (res) + VERB1("Got matching message (type=%s)",msg->type->name); + else + VERB0("Got message not matching our expectations"); + return res; +} +/** \brief Waits for a message to come in over a given socket. * - * Waits for a message to come in over a given socket. + * @param timeout: How long should we wait for this message. + * @param msgt_want: a dynar containing all accepted message type + * @param[out] ctx: the context of received message (in case it's a RPC call we want to answer to) + * @param[out] msgt_got: indice in the dynar of the type of the received message + * @param[out] payload: where to write the payload of the incomming message + * @return the error code (or no_error). * - * Every message of another type received before the one waited will be queued - * and used by subsequent call to this function or MsgHandle(). + * Every message of a type not in the accepted list received before the one + * waited will be queued and used by subsequent call to this function or + * gras_msg_handle(). + * + * If you are interested in the context, pass the address of a s_gras_msg_cb_ctx_t variable. */ -gras_error_t -gras_msg_wait(double timeout, - gras_msgtype_t *msgt_want, - gras_socket_t **expeditor, - void **payload) { - - gras_msgtype_t *msgt_got; - gras_error_t errcode; - double start, now; - gras_procdata_t *pd=gras_procdata_get(); - int cpt; - gras_msg_t msg; - - *expeditor = NULL; - *payload = NULL; +void gras_msg_wait_or(double timeout, + xbt_dynar_t msgt_want, + gras_msg_cb_ctx_t *ctx, + int *msgt_got, + void *payload) { + s_gras_msg_t msg; + + VERB1("Wait %f seconds for several message types",timeout); + gras_msg_wait_ext(timeout, + NULL, NULL, + &gras_msg_wait_or_filter, (void*)msgt_want, + &msg); + + if (msg.type->ctn_type) { + xbt_assert1(payload, + "Message type '%s' convey a payload you must accept", + msg.type->name); + } /* don't check the other side since some of the types may have a payload */ + + if (payload && msg.type->ctn_type) { + memcpy(payload,msg.payl,msg.payl_size); + free(msg.payl); + } - VERB1("Waiting for message %s",msgt_want->name); + if (ctx) + *ctx=gras_msg_cb_ctx_new(msg.expe,msg.type,msg.ID,60); - start = now = gras_time(); + if (msgt_got) + *msgt_got = xbt_dynar_search(msgt_want,msg.type); +} - gras_dynar_foreach(pd->msg_queue,cpt,msg){ - if (msg.type->code == msgt_want->code) { - *expeditor = msg.expeditor; - *payload = msg.payload; - gras_dynar_cursor_rm(pd->msg_queue, &cpt); - VERB0("Waited message was queued"); - return no_error; - } - } - while (1) { - TRY(gras_trp_select(timeout - now + start, expeditor)); - TRY(gras_msg_recv(*expeditor, &msgt_got, payload)); - if (msgt_got->code == msgt_want->code) { - VERB0("Got waited message"); - return no_error; - } +/** \brief Send the data pointed by \a payload as a message of type + * \a msgtype to the peer \a sock */ +void +gras_msg_send(gras_socket_t sock, + gras_msgtype_t msgtype, + void *payload) { - /* not expected msg type. Queue it for later */ - msg.expeditor = *expeditor; - msg.type = msgt_got; - msg.payload = *payload; - TRY(gras_dynar_push(pd->msg_queue,&msg)); - - now=gras_time(); - if (now - start + 0.001 < timeout) { - RAISE1(timeout_error,"Timeout while waiting for msg %s",msgt_want->name); - } + if (msgtype->ctn_type) { + xbt_assert1(payload, + "Message type '%s' convey a payload you must provide", + msgtype->name); + } else { + xbt_assert1(!payload, + "No payload was declared for message type '%s'", + msgtype->name); } - RAISE_IMPOSSIBLE; + DEBUG2("Send a oneway message of type '%s'. Payload=%p", + msgtype->name,payload); + gras_msg_send_ext(sock, e_gras_msg_kind_oneway,0, msgtype, payload); + VERB2("Sent a oneway message of type '%s'. Payload=%p", + msgtype->name,payload); } -/** - * gras_msg_handle: - * @timeOut: How long to wait for incoming messages - * @Returns: the error code (or no_error). +/** @brief Handle all messages arriving within the given period * - * Waits up to #timeOut# seconds to see if a message comes in; if so, calls the - * registered listener for that message (see RegisterCallback()). + * @param timeOut: How long to wait for incoming messages (in seconds) + * @return the error code (or no_error). + * + * Messages are dealed with just like gras_msg_handle() would do. The + * difference is that gras_msg_handle() handles at most one message (or wait up + * to timeout second when no message arrives) while this function handles any + * amount of messages, and lasts the given period in any case. + */ +void +gras_msg_handleall(double period) { + xbt_ex_t e; + double begin=gras_os_time(); + double now; + + do { + now=gras_os_time(); + TRY{ + gras_msg_handle(period - now + begin); + } CATCH(e) { + if (e.category != timeout_error) + RETHROW0("Error while waiting for messages: %s"); + xbt_ex_free(e); + } + } while (now - begin < period); +} +/** @brief Handle an incomming message or timer (or wait up to \a timeOut seconds) + * + * @param timeOut: How long to wait for incoming messages (in seconds) + * @return the error code (or no_error). + * + * Messages are passed to the callbacks. See also gras_msg_handleall(). */ -gras_error_t +void gras_msg_handle(double timeOut) { - gras_error_t errcode; - int cpt; - - gras_msg_t msg; - gras_socket_t *expeditor; - void *payload; - gras_msgtype_t *msgtype; + double untiltimer; + + int cpt, ran_ok; - gras_procdata_t*pd=gras_procdata_get(); - gras_cblist_t *list; - gras_cb_t cb; + s_gras_msg_t msg; + gras_msg_procdata_t pd=(gras_msg_procdata_t)gras_libdata_by_id(gras_msg_libdata_id); + gras_cblist_t *list=NULL; + gras_msg_cb_t cb; + s_gras_msg_cb_ctx_t ctx; + + int timerexpected, timeouted; + xbt_ex_t e; - - VERB1("Handling message within the next %d",timeOut); + VERB1("Handling message within the next %.2fs",timeOut); + untiltimer = gras_msg_timer_handle(); + DEBUG1("Next timer in %f sec", untiltimer); + if (untiltimer == 0.0) { + /* A timer was already elapsed and handled */ + return; + } + if (untiltimer != -1.0) { + timerexpected = 1; + timeOut = MIN(timeOut, untiltimer); + } else { + timerexpected = 0; + } + /* get a message (from the queue or from the net) */ - if (gras_dynar_length(pd->msg_queue)) { - gras_dynar_shift(pd->msg_queue,&msg); - expeditor = msg.expeditor; - msgtype = msg.type; - payload = msg.payload; - + timeouted = 0; + if (xbt_dynar_length(pd->msg_queue)) { + DEBUG0("Get a message from the queue"); + xbt_dynar_shift(pd->msg_queue,&msg); } else { - TRY(gras_trp_select(timeOut, &expeditor)); - TRY(gras_msg_recv(expeditor, &msgtype, &payload)); + TRY { + msg.expe = gras_trp_select(timeOut); + } CATCH(e) { + if (e.category != timeout_error) + RETHROW; + xbt_ex_free(e); + timeouted = 1; + } + + if (!timeouted) { + TRY { + /* FIXME: if not the right kind, queue it and recall ourself or goto >:-) */ + gras_msg_recv(msg.expe, &msg); + DEBUG1("Received a msg from the socket kind:%s", + e_gras_msg_kind_names[msg.kind]); + + } CATCH(e) { + RETHROW4("Error while receiving a message on select()ed socket %p to [%s]%s:%d: %s", + msg.expe, + gras_socket_peer_proc(msg.expe),gras_socket_peer_name(msg.expe), + gras_socket_peer_port(msg.expe)); + } + } } - - /* handle it */ - gras_dynar_foreach(pd->cbl_list,cpt,list) { - if (list->id == msgtype->code) { + + if (timeouted) { + if (timerexpected) { + + /* A timer elapsed before the arrival of any message even if we select()ed a bit */ + untiltimer = gras_msg_timer_handle(); + if (untiltimer == 0.0) { + /* we served a timer, we're done */ + return; + } else { + xbt_assert1(untiltimer>0, "Negative timer (%f). I'm 'puzzeled'", untiltimer); + WARN1("No timer elapsed, in contrary to expectations (next in %f sec)", + untiltimer); + THROW1(timeout_error,0, + "No timer elapsed, in contrary to expectations (next in %f sec)", + untiltimer); + } + + } else { + /* select timeouted, and no timer elapsed. Nothing to do */ + THROW1(timeout_error, 0, "No new message or timer (delay was %f)", + timeOut); + } + + } + + /* A message was already there or arrived in the meanwhile. handle it */ + xbt_dynar_foreach(pd->cbl_list,cpt,list) { + if (list->id == msg.type->code) { break; } else { list=NULL; } } if (!list) { - INFO1("Unexpected message '%s' ignored", msgtype->name); + INFO3("No callback for the incomming '%s' message (from %s:%d). Discarded.", + msg.type->name, + gras_socket_peer_name(msg.expe),gras_socket_peer_port(msg.expe)); WARN0("FIXME: gras_datadesc_free not implemented => leaking the payload"); - return no_error; + return; } - gras_dynar_foreach(list->cbs,cpt,cb) { - if (cb(expeditor,msgtype->ctn_type,payload)) { - /* cb handled the message */ - return no_error; + ctx.expeditor = msg.expe; + ctx.ID = msg.ID; + ctx.msgtype = msg.type; + + switch (msg.kind) { + case e_gras_msg_kind_oneway: + case e_gras_msg_kind_rpccall: + ran_ok=0; + TRY { + xbt_dynar_foreach(list->cbs,cpt,cb) { + if (!ran_ok) { + DEBUG4("Use the callback #%d (@%p) for incomming msg %s (payload_size=%d)", + cpt+1,cb,msg.type->name,msg.payl_size); + if ((*cb)(&ctx,msg.payl)) { + /* cb handled the message */ + free(msg.payl); + ran_ok = 1; + } + } + } + } CATCH(e) { + free(msg.payl); + if (msg.type->kind == e_gras_msg_kind_rpccall) { + /* The callback raised an exception, propagate it on the network */ + if (!e.remote) { /* the exception is born on this machine */ + e.host = (char*)gras_os_myname(); + xbt_ex_setup_backtrace(&e); + } + VERB5("Propagate %s exception ('%s') from '%s' RPC cb back to %s:%d", + (e.remote ? "remote" : "local"), + e.msg, + msg.type->name, + gras_socket_peer_name(msg.expe), + gras_socket_peer_port(msg.expe)); + gras_msg_send_ext(msg.expe, e_gras_msg_kind_rpcerror, + msg.ID, msg.type, &e); + xbt_ex_free(e); + ran_ok=1; + } else { + RETHROW0("Callback raised an exception: %s"); + } } + if (!ran_ok) + THROW1(mismatch_error,0, + "Message '%s' refused by all registered callbacks", msg.type->name); + /* FIXME: gras_datadesc_free not implemented => leaking the payload */ + break; + + + case e_gras_msg_kind_rpcanswer: + INFO1("Unexpected RPC answer discarded (type: %s)", msg.type->name); + WARN0("FIXME: gras_datadesc_free not implemented => leaking the payload"); + return; + + case e_gras_msg_kind_rpcerror: + INFO1("Unexpected RPC error discarded (type: %s)", msg.type->name); + WARN0("FIXME: gras_datadesc_free not implemented => leaking the payload"); + return; + + default: + THROW1(unknown_error,0, + "Cannot handle messages of kind %d yet",msg.type->kind); } - INFO1("Message '%s' refused by all registered callbacks", msgtype->name); - WARN0("FIXME: gras_datadesc_free not implemented => leaking the payload"); - return mismatch_error; } -gras_error_t -gras_cb_register(gras_msgtype_t *msgtype, - gras_cb_t cb) { - gras_error_t errcode; - gras_procdata_t *pd=gras_procdata_get(); - gras_cblist_t *list; +void +gras_cbl_free(void *data){ + gras_cblist_t *list=*(void**)data; + if (list) { + xbt_dynar_free(&( list->cbs )); + free(list); + } +} + +/** \brief Bind the given callback to the given message type + * + * Several callbacks can be attached to a given message type. The lastly added one will get the message first, and + * if it returns false, the message will be passed to the second one. + * And so on until one of the callbacks accepts the message. + */ +void +gras_cb_register(gras_msgtype_t msgtype, + gras_msg_cb_t cb) { + gras_msg_procdata_t pd=(gras_msg_procdata_t)gras_libdata_by_id(gras_msg_libdata_id); + gras_cblist_t *list=NULL; int cpt; + DEBUG2("Register %p as callback to '%s'",cb,msgtype->name); + /* search the list of cb for this message on this host (creating if NULL) */ - gras_dynar_foreach(pd->cbl_list,cpt,list) { + xbt_dynar_foreach(pd->cbl_list,cpt,list) { if (list->id == msgtype->code) { break; } else { @@ -393,33 +679,29 @@ gras_cb_register(gras_msgtype_t *msgtype, } if (!list) { /* First cb? Create room */ - list = malloc(sizeof(gras_cblist_t)); - if (!list) - RAISE_MALLOC; - + list = xbt_new(gras_cblist_t,1); list->id = msgtype->code; - TRY(gras_dynar_new(&(list->cbs), sizeof(gras_cb_t), NULL)); - TRY(gras_dynar_push(pd->cbl_list,&list)); + list->cbs = xbt_dynar_new(sizeof(gras_msg_cb_t), NULL); + xbt_dynar_push(pd->cbl_list,&list); } /* Insert the new one into the set */ - TRY(gras_dynar_insert_at(list->cbs,0,cb)); - - return no_error; + xbt_dynar_insert_at(list->cbs,0,&cb); } +/** \brief Unbind the given callback from the given message type */ void -gras_cb_unregister(gras_msgtype_t *msgtype, - gras_cb_t cb) { +gras_cb_unregister(gras_msgtype_t msgtype, + gras_msg_cb_t cb) { - gras_procdata_t *pd=gras_procdata_get(); + gras_msg_procdata_t pd=(gras_msg_procdata_t)gras_libdata_by_id(gras_msg_libdata_id); gras_cblist_t *list; - gras_cb_t cb_cpt; + gras_msg_cb_t cb_cpt; int cpt; int found = 0; /* search the list of cb for this message on this host */ - gras_dynar_foreach(pd->cbl_list,cpt,list) { + xbt_dynar_foreach(pd->cbl_list,cpt,list) { if (list->id == msgtype->code) { break; } else { @@ -429,9 +711,9 @@ gras_cb_unregister(gras_msgtype_t *msgtype, /* Remove it from the set */ if (list) { - gras_dynar_foreach(list->cbs,cpt,cb_cpt) { + xbt_dynar_foreach(list->cbs,cpt,cb_cpt) { if (cb == cb_cpt) { - gras_dynar_cursor_rm(list->cbs, &cpt); + xbt_dynar_cursor_rm(list->cbs, &cpt); found = 1; } } @@ -440,3 +722,27 @@ gras_cb_unregister(gras_msgtype_t *msgtype, VERB1("Ignoring removal of unexisting callback to msg id %d", msgtype->code); } + +/** \brief Retrieve the expeditor of the message */ +gras_socket_t gras_msg_cb_ctx_from(gras_msg_cb_ctx_t ctx) { + return ctx->expeditor; +} +/* \brief Creates a new message exchange context (user should never have to) */ +gras_msg_cb_ctx_t gras_msg_cb_ctx_new(gras_socket_t expe, + gras_msgtype_t msgtype, + unsigned long int ID, + double timeout) { + gras_msg_cb_ctx_t res=xbt_new(s_gras_msg_cb_ctx_t,1); + res->expeditor = expe; + res->msgtype = msgtype; + res->ID = ID; + res->timeout = timeout; + return res; +} +/* \brief Frees a message exchange context + * + * This function is mainly useful with \ref gras_msg_wait_or, ie seldom. + */ +void gras_msg_cb_ctx_free(gras_msg_cb_ctx_t ctx) { + free(ctx); +}