-/* Copyright (c) 2006-2015. The SimGrid Team.
- * All rights reserved. */
+/* Copyright (c) 2006-2016. 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. */
-/** @addtogroup MSG_examples
- *
- * - <b>io/storage.c</b> demo of all main storage and file functions
- */
-
-/********************* Files and Storage handling ****************************
- * This example implements all main storage and file functions of the MSG API
- *
- * Scenario :
- * - display information on the disks mounted by the current host
- * - create a 200,000 bytes file
- * - completely read the created file
- * - write 100,000 bytes in the file
- * - rename the created file
- * - attach some user data to a disk
- * - dump disk's contents
- *
-******************************************************************************/
-
#include "simgrid/msg.h"
+#include "simgrid/plugins/file_system.h"
XBT_LOG_NEW_DEFAULT_CATEGORY(storage,"Messages specific for this simulation");
static int host(int argc, char *argv[]){
const char* host_name = MSG_host_get_name(MSG_host_self());
- // display information on the disks mounted by the current host
+ /* - Display information on the disks mounted by the current host */
XBT_INFO("*** Storage info on %s ***", host_name);
xbt_dict_cursor_t cursor = NULL;
char* mount_name;
char* storage_name;
- msg_storage_t storage = NULL;
- // Retrieve all mount points of current host
+ /* - Retrieve all mount points of current host */
xbt_dict_t storage_list = MSG_host_get_mounted_storage_list(MSG_host_self());
- xbt_dict_foreach(storage_list,cursor,mount_name,storage_name) {
- // For each disk mounted on host
+ /* - For each disk mounted on host, display disk name and mount point */
+ xbt_dict_foreach (storage_list, cursor, mount_name, storage_name)
XBT_INFO("Storage name: %s, mount name: %s", storage_name, mount_name);
- storage = MSG_storage_get_by_name(storage_name);
-
- // Retrieve disk's information
- sg_size_t free_size = MSG_storage_get_free_size(storage);
- sg_size_t used_size = MSG_storage_get_used_size(storage);
- sg_size_t size = MSG_storage_get_size(storage);
- XBT_INFO("Total size: %llu bytes", size);
- XBT_INFO("Free size: %llu bytes", free_size);
- XBT_INFO("Used size: %llu bytes", used_size);
- }
xbt_dict_free(&storage_list);
- // Create a 200,000 bytes file named './tmp/data.txt' on /sd1
- char* file_name = xbt_strdup("/home/tmp/data.txt");
- msg_file_t file = NULL;
- sg_size_t write, read, file_size;
-
- // Open an non-existing file amounts to create it!
- file = MSG_file_open(file_name, NULL);
- write = MSG_file_write(file, 200000); // Write 200,000 bytes
- XBT_INFO("Create a %llu bytes file named '%s' on /sd1", write, file_name);
- MSG_file_dump(file);
-
- // check that sizes have changed
- XBT_INFO("Free size: %llu bytes", MSG_storage_get_free_size(storage));
- XBT_INFO("Used size: %llu bytes", MSG_storage_get_used_size(storage));
-
- // Now retrieve the size of created file and read it completely
- file_size = MSG_file_get_size(file);
- MSG_file_seek(file, 0, SEEK_SET);
- read = MSG_file_read(file, file_size);
- XBT_INFO("Read %llu bytes on %s", read, file_name);
-
- // Now write 100,000 bytes in tmp/data.txt
- write = MSG_file_write(file, 100000); // Write 100,000 bytes
- XBT_INFO("Write %llu bytes on %s", write, file_name);
- MSG_file_dump(file);
+ /* - Write 200,000 bytes on Disk4 */
+ msg_storage_t storage = MSG_storage_get_by_name("Disk4");
+ sg_size_t write = MSG_storage_write(storage, 200000); // Write 200,000 bytes
+ XBT_INFO("Wrote %llu bytes on 'Disk4'", write);
- storage_name = xbt_strdup("Disk4");
- storage = MSG_storage_get_by_name(storage_name);
+ /* - Now read 200,000 bytes */
+ sg_size_t read = MSG_storage_read(storage, 200000);
+ XBT_INFO("Read %llu bytes on 'Disk4'", read);
- // Now rename file from ./tmp/data.txt to ./tmp/simgrid.readme
- XBT_INFO("*** Move '/tmp/data.txt' into '/tmp/simgrid.readme'");
- MSG_file_move(file, "/home/tmp/simgrid.readme");
+ /* - Attach some user data to disk1 */
+ XBT_INFO("*** Get/set data for storage element: Disk4 ***");
- // Attach some user data to the file
- MSG_file_set_data(file, xbt_strdup("777"));
- // Retrieve these data
- char *data = MSG_file_get_data(file);
- XBT_INFO("User data attached to the file: %s", data);
-
- MSG_file_close(file);
- free(file_name);
-
- // Now attach some user data to disk1
- XBT_INFO("*** Get/set data for storage element: %s ***",storage_name);
-
- data = MSG_storage_get_data(storage);
+ char* data = MSG_storage_get_data(storage);
XBT_INFO("Get storage data: '%s'", data);
data = MSG_storage_get_data(storage);
XBT_INFO("Set and get data: '%s'", data);
xbt_free(data);
- xbt_free(storage_name);
-
- // Dump disks contents
- XBT_INFO("*** Dump content of %s ***",MSG_host_get_name(MSG_host_self()));
- xbt_dict_t contents = NULL;
- contents = MSG_host_get_storage_content(MSG_host_self()); // contents is a dict of dicts
- xbt_dict_cursor_t curs, curs2 = NULL;
- char* mountname;
- xbt_dict_t content;
- char* path;
- sg_size_t *size;
- xbt_dict_foreach(contents, curs, mountname, content){
- XBT_INFO("Print the content of mount point: %s",mountname);
- xbt_dict_foreach(content,curs2,path,size){
- XBT_INFO("%s size: %llu bytes", path,*((sg_size_t*)size));
- }
- xbt_dict_free(&content);
- }
- xbt_dict_free(&contents);
+
return 1;
}
int main(int argc, char *argv[])
{
MSG_init(&argc, argv);
+
MSG_create_environment(argv[1]);
MSG_function_register("host", host);
xbt_dynar_t hosts = MSG_hosts_as_dynar();
- MSG_process_create(NULL, host, NULL, xbt_dynar_get_as(hosts,0,msg_host_t) );
+ MSG_process_create(NULL, host, NULL, xbt_dynar_get_as(hosts, 3, msg_host_t));
xbt_dynar_free(&hosts);
msg_error_t res = MSG_main();
