1 /* Copyright (c) 2008-2019. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #include "simgrid/msg.h"
7 #include "simgrid/plugins/file_system.h"
9 #include <stdio.h> /* SEEK_SET */
11 XBT_LOG_NEW_DEFAULT_CATEGORY(io_file, "Messages specific for this io example");
13 static int host(XBT_ATTRIB_UNUSED int argc, XBT_ATTRIB_UNUSED char* argv[])
15 msg_file_t file = NULL;
20 switch (MSG_process_self_PID()) {
22 file = MSG_file_open("/tmp/include/surf/simgrid_dtd.h", NULL);
26 file = MSG_file_open("/home/doc/simgrid/examples/platforms/nancy.xml", NULL);
30 file = MSG_file_open("/home/doc/simgrid/examples/platforms/g5k_cabinets.xml", NULL);
34 file = MSG_file_open("/home/doc/simgrid/examples/platforms/g5k.xml", NULL);
39 xbt_die("FILENAME NOT DEFINED %s", MSG_process_get_name(MSG_process_self()));
42 const char* filename = MSG_file_get_name(file);
43 XBT_INFO("\tOpen file '%s'", filename);
44 const_sg_storage_t st = MSG_storage_get_by_name(st_name);
46 XBT_INFO("\tCapacity of the storage element '%s' is stored on: %llu / %llu", filename, MSG_storage_get_used_size(st),
47 MSG_storage_get_size(st));
49 /* Try to read for 10MB */
50 read = MSG_file_read(file, 10000000);
51 XBT_INFO("\tHave read %llu from '%s'", read, filename);
53 /* Write 100KB in file from the current position, i.e, end of file or 10MB */
54 write = MSG_file_write(file, 100000);
55 XBT_INFO("\tHave written %llu in '%s'. Size now is: %llu", write, filename, MSG_file_get_size(file));
57 XBT_INFO("\tCapacity of the storage element '%s' is stored on: %llu / %llu", filename, MSG_storage_get_used_size(st),
58 MSG_storage_get_size(st));
60 /* rewind to the beginning of the file */
61 XBT_INFO("\tComing back to the beginning of the stream for file '%s'", filename);
62 MSG_file_seek(file, 0, SEEK_SET);
64 /* Try to read 110KB */
65 read = MSG_file_read(file, 110000);
66 XBT_INFO("\tHave read %llu from '%s' (of size %llu)", read, filename, MSG_file_get_size(file));
68 /* rewind once again to the beginning of the file */
69 XBT_INFO("\tComing back to the beginning of the stream for file '%s'", filename);
70 MSG_file_seek(file, 0, SEEK_SET);
72 /* Write 110KB in file from the current position, i.e, end of file or 10MB */
73 write = MSG_file_write(file, 110000);
74 XBT_INFO("\tHave written %llu in '%s'. Size now is: %llu", write, filename, MSG_file_get_size(file));
76 XBT_INFO("\tCapacity of the storage element '%s' is stored on: %llu / %llu", filename, MSG_storage_get_used_size(st),
77 MSG_storage_get_size(st));
79 if (MSG_process_self_PID() == 1) {
80 XBT_INFO("\tUnlink file '%s'", MSG_file_get_name(file));
81 MSG_file_unlink(file);
83 XBT_INFO("\tClose file '%s'", filename);
89 int main(int argc, char** argv)
91 MSG_init(&argc, argv);
92 MSG_storage_file_system_init();
94 MSG_create_environment(argv[1]);
95 xbt_dynar_t hosts = MSG_hosts_as_dynar();
96 MSG_function_register("host", host);
97 unsigned long nb_hosts = xbt_dynar_length(hosts);
98 XBT_INFO("Number of host '%lu'", nb_hosts);
99 for (int i = 0; i < nb_hosts; i++) {
100 MSG_process_create("host", host, NULL, xbt_dynar_get_as(hosts, i, msg_host_t));
102 xbt_dynar_free(&hosts);
104 int res = MSG_main();
105 XBT_INFO("Simulation time %.6f", MSG_get_clock());
106 return res != MSG_OK;