1 /* Copyright (c) 2008-2010, 2012-2015. 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"
27 int host(int argc, char *argv[]);
29 XBT_LOG_NEW_DEFAULT_CATEGORY(io_file,
30 "Messages specific for this io example");
32 int host(int argc, char *argv[])
34 msg_file_t file = NULL;
39 if(!strcmp(MSG_process_get_name(MSG_process_self()),"0")){
40 file = MSG_file_open(FILENAME1, NULL);
43 } else if(!strcmp(MSG_process_get_name(MSG_process_self()),"1")) {
44 file = MSG_file_open(FILENAME2, NULL);
46 } else if(!strcmp(MSG_process_get_name(MSG_process_self()),"2")){
47 file = MSG_file_open(FILENAME3, NULL);
49 } else if(!strcmp(MSG_process_get_name(MSG_process_self()),"3")){
50 file = MSG_file_open(FILENAME4, NULL);
53 else xbt_die("FILENAME NOT DEFINED %s",MSG_process_get_name(MSG_process_self()));
55 const char* filename = MSG_file_get_name(file);
56 XBT_INFO("\tOpen file '%s'",filename);
57 st = MSG_storage_get_by_name(st_name);
59 XBT_INFO("\tCapacity of the storage element '%s' is stored on: %llu / %llu",
60 filename, MSG_storage_get_used_size(st), MSG_storage_get_size(st));
62 /* Try to read for 10MB */
63 read = MSG_file_read(file, 10000000);
64 XBT_INFO("\tHave read %llu from '%s'",read,filename);
66 /* Write 100KB in file from the current position, i.e, end of file or 10MB */
67 write = MSG_file_write(file, 100000);
68 XBT_INFO("\tHave written %llu in '%s'. Size now is: %llu",write,filename,
69 MSG_file_get_size(file));
72 XBT_INFO("\tCapacity of the storage element '%s' is stored on: %llu / %llu",
73 filename, MSG_storage_get_used_size(st), MSG_storage_get_size(st));
75 /* rewind to the beginning of the file */
76 XBT_INFO("\tComing back to the beginning of the stream for file '%s'",
78 MSG_file_seek(file, 0, SEEK_SET);
80 /* Try to read 110KB */
81 read = MSG_file_read(file, 110000);
82 XBT_INFO("\tHave read %llu from '%s' (of size %llu)",read,filename,
83 MSG_file_get_size(file));
85 /* rewind once again to the beginning of the file */
86 XBT_INFO("\tComing back to the beginning of the stream for file '%s'",
88 MSG_file_seek(file, 0, SEEK_SET);
90 /* Write 110KB in file from the current position, i.e, end of file or 10MB */
91 write = MSG_file_write(file, 110000);
92 XBT_INFO("\tHave written %llu in '%s'. Size now is: %llu", write,filename,
93 MSG_file_get_size(file));
95 XBT_INFO("\tCapacity of the storage element '%s' is stored on: %llu / %llu",
96 filename, MSG_storage_get_used_size(st), MSG_storage_get_size(st));
98 XBT_INFO("\tClose file '%s'",filename);
105 int main(int argc, char **argv)
108 MSG_init(&argc, argv);
109 MSG_create_environment(argv[1]);
110 xbt_dynar_t hosts = MSG_hosts_as_dynar();
111 MSG_function_register("host", host);
112 unsigned long nb_hosts = xbt_dynar_length(hosts);
113 XBT_INFO("Number of host '%lu'",nb_hosts);
114 for(i = 0 ; i<nb_hosts; i++)
116 char* name_host = bprintf("%d",i);
117 MSG_process_create( name_host, host, NULL, xbt_dynar_get_as(hosts,i,msg_host_t) );
120 xbt_dynar_free(&hosts);
123 XBT_INFO("Simulation time %g", MSG_get_clock());
124 return res != MSG_OK;