1 /* Copyright (c) 2008-2010, 2012-2014. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 /** @addtogroup MSG_examples
9 * @subsection MSG_ex_resources Other resource kinds
11 * This section contains some sparse examples of how to use the other
12 * kind of resources, such as disk or GPU. These resources are quite
13 * experimental for now, but here we go anyway.
15 * - <b>io/file.c</b> Example with the disk resource
18 #define FILENAME1 "/home/doc/simgrid/examples/platforms/g5k.xml"
19 #define FILENAME2 "c:\\Windows\\setupact.log"
20 #define FILENAME3 "/home/doc/simgrid/examples/platforms/g5k_cabinets.xml"
21 #define FILENAME4 "/home/doc/simgrid/examples/platforms/nancy.xml"
25 #include "simgrid/msg.h"
26 #include "surf/surf_private.h"
28 int host(int argc, char *argv[]);
30 XBT_LOG_NEW_DEFAULT_CATEGORY(io_file,
31 "Messages specific for this io example");
33 int host(int argc, char *argv[])
35 msg_file_t file = NULL;
40 if(!strcmp(MSG_process_get_name(MSG_process_self()),"0")){
41 file = MSG_file_open(FILENAME1, NULL);
44 } else if(!strcmp(MSG_process_get_name(MSG_process_self()),"1")) {
45 file = MSG_file_open(FILENAME2, NULL);
47 } else if(!strcmp(MSG_process_get_name(MSG_process_self()),"2")){
48 file = MSG_file_open(FILENAME3, NULL);
50 } else if(!strcmp(MSG_process_get_name(MSG_process_self()),"3")){
51 file = MSG_file_open(FILENAME4, NULL);
54 else xbt_die("FILENAME NOT DEFINED %s",MSG_process_get_name(MSG_process_self()));
56 const char* filename = MSG_file_get_name(file);
57 XBT_INFO("\tOpen file '%s'",filename);
58 st = MSG_storage_get_by_name(st_name);
60 XBT_INFO("\tCapacity of the storage element '%s' is stored on: %llu / %llu",
61 filename, MSG_storage_get_used_size(st), MSG_storage_get_size(st));
63 /* Try to read for 10MB */
64 read = MSG_file_read(file, 10000000);
65 XBT_INFO("\tHave read %llu from '%s'",read,filename);
67 /* Write 100KB in file from the current position, i.e, end of file or 10MB */
68 write = MSG_file_write(file, 100000);
69 XBT_INFO("\tHave written %llu in '%s'. Size now is: %llu",write,filename,
70 MSG_file_get_size(file));
73 XBT_INFO("\tCapacity of the storage element '%s' is stored on: %llu / %llu",
74 filename, MSG_storage_get_used_size(st), MSG_storage_get_size(st));
76 /* rewind to the beginning of the file */
77 XBT_INFO("\tComing back to the beginning of the stream for file '%s'",
79 MSG_file_seek(file, 0, SEEK_SET);
81 /* Try to read 110KB */
82 read = MSG_file_read(file, 110000);
83 XBT_INFO("\tHave read %llu from '%s' (of size %llu)",read,filename,
84 MSG_file_get_size(file));
86 /* rewind once again to the beginning of the file */
87 XBT_INFO("\tComing back to the beginning of the stream for file '%s'",
89 MSG_file_seek(file, 0, SEEK_SET);
91 /* Write 110KB in file from the current position, i.e, end of file or 10MB */
92 write = MSG_file_write(file, 110000);
93 XBT_INFO("\tHave written %llu in '%s'. Size now is: %llu", write,filename,
94 MSG_file_get_size(file));
96 XBT_INFO("\tCapacity of the storage element '%s' is stored on: %llu / %llu",
97 filename, MSG_storage_get_used_size(st), MSG_storage_get_size(st));
99 XBT_INFO("\tClose file '%s'",filename);
100 MSG_file_close(file);
106 int main(int argc, char **argv)
109 MSG_init(&argc, argv);
110 MSG_create_environment(argv[1]);
111 xbt_dynar_t hosts = MSG_hosts_as_dynar();
112 MSG_function_register("host", host);
113 unsigned long nb_hosts = xbt_dynar_length(hosts);
114 XBT_INFO("Number of host '%lu'",nb_hosts);
115 for(i = 0 ; i<nb_hosts; i++)
117 char* name_host = bprintf("%d",i);
118 MSG_process_create( name_host, host, NULL, xbt_dynar_get_as(hosts,i,msg_host_t) );
121 xbt_dynar_free(&hosts);
124 XBT_INFO("Simulation time %g", MSG_get_clock());