X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/ec16845133f5f1b5262d2d77d8ba22824fa8a446..187ba0c05f9fbe51175179b9f637b6554f947468:/examples/gras/mutual_exclusion/simple_token/simple_token.c diff --git a/examples/gras/mutual_exclusion/simple_token/simple_token.c b/examples/gras/mutual_exclusion/simple_token/simple_token.c deleted file mode 100644 index 65a7d2d05e..0000000000 --- a/examples/gras/mutual_exclusion/simple_token/simple_token.c +++ /dev/null @@ -1,194 +0,0 @@ -/* stoken - simple/static token ring */ - -/* Copyright (c) 2006, 2007, 2009, 2010. The SimGrid Team. - * 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.h" - -#define NBLOOPS 3 -/*#define NBLOOPS 30000*/ - -XBT_LOG_NEW_DEFAULT_CATEGORY(SimpleToken, - "Messages specific to this example"); - -/* Function prototypes */ -int node(int argc, char *argv[]); - - -/* ********************************************************************** - * Node code - * **********************************************************************/ - -/* Global private data */ -typedef struct { - gras_socket_t sock; /* server socket on which I hear */ - int remaining_loop; /* number of loops to do until done */ - int create; /* whether I have to create the token */ - gras_socket_t tosuccessor; /* how to connect to the successor on ring */ - double start_time; /* to measure the elapsed time. Only used by the - node that creates the token */ -} node_data_t; - - -/* Callback function */ -static int node_cb_stoken_handler(gras_msg_cb_ctx_t ctx, void *payload) -{ - - xbt_ex_t e; - - /* 1. Get the payload into the msg variable, and retrieve my caller */ - int msg = *(int *) payload; - gras_socket_t expeditor = gras_msg_cb_ctx_from(ctx); - - - /* 2. Retrieve the node's state (globals) */ - node_data_t *globals = (node_data_t *) gras_userdata_get(); - - /* 3. Log which predecessor connected */ - int supersteps = 1; /* only log every superstep loop */ - if (NBLOOPS >= 1000) { - supersteps = 100; - } else if (NBLOOPS >= 100) { - supersteps = 10; - } else if (NBLOOPS <= 10) { - supersteps = 1; - } - if (globals->create && (!(globals->remaining_loop % supersteps))) { - XBT_INFO("Begin a new loop. Still to do: %d", globals->remaining_loop); - } else if (!(globals->remaining_loop % supersteps)) { - XBT_VERB("Got token(%d) from %s remaining_loop=%d", - msg, gras_socket_peer_name(expeditor), globals->remaining_loop); - } - - /* 4. If the right shouldn't be stopped yet */ - if (globals->remaining_loop > 0) { - msg += 1; - - XBT_DEBUG("Send token(%d) to %s:%d", msg, - gras_socket_peer_name(globals->tosuccessor), - gras_socket_peer_port(globals->tosuccessor)); - - /* 5. Send the token as payload of a stoken message to the successor */ - TRY { - gras_msg_send(globals->tosuccessor, "stoken", &msg); - - /* 6. Deal with errors */ - } - CATCH(e) { - gras_socket_close(globals->sock); - RETHROWF("Unable to forward token: %s"); - } - - } - - /* DO NOT CLOSE THE expeditor SOCKET since the client socket is - reused by our predecessor. - Closing this side would thus create troubles */ - - /* 7. Decrease the remaining_loop integer. */ - globals->remaining_loop -= 1; - - /* 8. Repport the hop number to the user at the end */ - if (globals->remaining_loop == -1 && globals->create) { - double elapsed = gras_os_time() - globals->start_time; - XBT_INFO("Shut down the token-ring. There was %d hops.", msg); - XBT_VERB("Elapsed time: %g", elapsed); - } - - /* 9. Tell GRAS that we consummed this message */ - return 0; -} /* end_of_node_cb_stoken_handler */ - -int node(int argc, char *argv[]) -{ - node_data_t *globals; - - const char *host; - int myport; - int peerport; - - xbt_ex_t e; - - /* 1. Init the GRAS infrastructure and declare my globals */ - gras_init(&argc, argv); - globals = gras_userdata_new(node_data_t); - - - /* 2. Get the successor's address. The command line overrides - defaults when specified */ - host = "127.0.0.1"; - myport = 4000; - peerport = 4000; - if (argc >= 4) { - myport = atoi(argv[1]); - host = argv[2]; - peerport = atoi(argv[3]); - } - - /* 3. Save successor's address in global var */ - globals->remaining_loop = NBLOOPS; - globals->create = 0; - globals->tosuccessor = NULL; - - if (!gras_os_getpid() % 100 || gras_if_RL()) - XBT_INFO("Launch node listening on %d (successor on %s:%d)", - myport, host, peerport); - - /* 4. Register the known messages. */ - gras_msgtype_declare("stoken", gras_datadesc_by_name("int")); - - /* 5. Create my master socket for listening */ - globals->sock = gras_socket_server(myport); - gras_os_sleep(1.0); /* Make sure all server sockets are created */ - - /* 6. Create socket to the successor on the ring */ - XBT_DEBUG("Connect to my successor on %s:%d", host, peerport); - - globals->tosuccessor = gras_socket_client(host, peerport); - - /* 7. Register my callback */ - gras_cb_register("stoken", &node_cb_stoken_handler); - - /* 8. One node has to create the token at startup. - It's specified by a command line argument */ - if (argc >= 5 - && !strncmp("--create-token", argv[4], strlen("--create-token"))) - globals->create = 1; - - if (globals->create) { - int token = 0; - - globals->start_time = gras_os_time(); - - globals->remaining_loop = NBLOOPS - 1; - - XBT_INFO("Create the token (with value %d) and send it to %s:%d", - token, host, peerport); - - TRY { - gras_msg_send(globals->tosuccessor, "stoken", &token); - } CATCH(e) { - RETHROWF("Unable to send the freshly created token: %s"); - } - } - - /* 8. Wait up to 10 seconds for an incomming message to handle */ - while (globals->remaining_loop > (globals->create ? -1 : 0)) { - gras_msg_handle(-1); - - XBT_DEBUG("looping (remaining_loop=%d)", globals->remaining_loop); - } - - gras_os_sleep(1.0); /* FIXME: if the sender quited, receive fail */ - - /* 9. Free the allocated resources, and shut GRAS down */ - gras_socket_close(globals->sock); - gras_socket_close(globals->tosuccessor); - free(globals); - gras_exit(); - - return 0; -} /* end_of_node */