-/* Copyright (c) 2006-2013. The SimGrid Team.
+/* Copyright (c) 2006-2015. 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
*
* - display information on the disks mounted by the current host
* - create a 200,000 bytes file
* - completely read the created file
- * - write 100,000 more bytes in the file
+ * - write 100,000 bytes in the file
* - rename the created file
* - attach some user data to a disk
* - dump disk's contents
*
******************************************************************************/
-#include "msg/msg.h"
+#include "simgrid/msg.h"
#include "xbt/log.h"
#include "xbt/dict.h"
- /* To use PRIu64 format specifier for printing uint64_t (sg_size_t) */
-#include <inttypes.h>
-
XBT_LOG_NEW_DEFAULT_CATEGORY(storage,"Messages specific for this simulation");
static int host(int argc, char *argv[]){
xbt_dict_cursor_t cursor = NULL;
char* mount_name;
char* storage_name;
- msg_storage_t storage;
+ msg_storage_t storage = NULL;
// Retrieve all mount points of current host
- xbt_dict_t storage_list = MSG_host_get_storage_list(MSG_host_self());
+ 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
storage = MSG_storage_get_by_name(storage_name);
// Retrieve disk's information
- sg_size_t free_size = MSG_storage_get_free_size(mount_name);
- sg_size_t used_size = MSG_storage_get_used_size(mount_name);
+ 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: %"PRIu64" bytes", size);
- XBT_INFO("Free size: %"PRIu64" bytes", free_size);
- XBT_INFO("Used size: %"PRIu64" bytes", used_size);
+ 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* mount = xbt_strdup("/home");
- char* file_name = xbt_strdup("./tmp/data.txt");
+ 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(mount, file_name, NULL);
+ file = MSG_file_open(file_name, NULL);
write = MSG_file_write(file, 200000); // Write 200,000 bytes
- XBT_INFO("Create a %"PRIu64" bytes file named '%s' on /sd1", write, file_name);
+ 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: %"PRIu64" bytes", MSG_storage_get_free_size("/home"));
- XBT_INFO("Used size: %"PRIu64" bytes", MSG_storage_get_used_size("/home"));
+ 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 %"PRIu64" bytes on %s", read, file_name);
+ XBT_INFO("Read %llu bytes on %s", read, file_name);
- // Now write 100,000 more bytes in tmp/data.txt
+ // Now write 100,000 bytes in tmp/data.txt
write = MSG_file_write(file, 100000); // Write 100,000 bytes
- XBT_INFO("Write %"PRIu64" more bytes on %s", write, file_name);
+ XBT_INFO("Write %llu bytes on %s", write, file_name);
MSG_file_dump(file);
- MSG_file_close(file);
- free(mount);
- free(file_name);
-
storage_name = xbt_strdup("Disk4");
storage = MSG_storage_get_by_name(storage_name);
// Now rename file from ./tmp/data.txt to ./tmp/simgrid.readme
- XBT_INFO("*** Renaming './tmp/data.txt' into './tmp/simgrid.readme'");
- MSG_storage_file_rename(storage, "./tmp/data.txt", "./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 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);
- char *data = MSG_storage_get_data(storage);
+ data = MSG_storage_get_data(storage);
- XBT_INFO("Get data: '%s'", data);
+ XBT_INFO("Get storage data: '%s'", data);
- MSG_storage_set_data(storage,strdup("Some user data"));
+ MSG_storage_set_data(storage, xbt_strdup("Some user data"));
data = MSG_storage_get_data(storage);
XBT_INFO("Set and get data: '%s'", data);
+ xbt_free(data);
xbt_free(storage_name);
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: %"PRIu64" bytes", path,*((sg_size_t*)size));
+ XBT_INFO("%s size: %llu bytes", path,*((sg_size_t*)size));
}
xbt_dict_free(&content);
}
