1 /* Copyright (c) 2006-2015. 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 #ifndef SIMGRID_S4U_FILE_HPP
7 #define SIMGRID_S4U_FILE_HPP
9 #include <boost/unordered_map.hpp>
12 #include "simgrid/simix.h"
20 /** @brief A simulated file
22 * Used to simulate the time it takes to access to a file, but does not really store any information.
24 * They are located on @link{simgrid::s4u::Storage}, that are accessed from a given @link{simgrid::s4u::Host} through mountpoints.
25 * For now, you cannot change the mountpoints programatically, and must declare them from your platform file.
29 File(const char *fullpath, void* userdata);
32 smx_file_t p_inferior;
36 /** Retrieves the path to the file */
37 const char *path() { return p_path;}
39 /** Simulates a read action. Returns the size of data actually read
41 * FIXME: reading from a remotely mounted disk is not implemented yet. Any storage is considered as local, and no network communication ever occur.
43 sg_size_t read(sg_size_t size);
44 /** Simulates a write action. Returns the size of data actually written.
46 * FIXME: reading from a remotely mounted disk is not implemented yet. Any storage is considered as local, and no network communication ever occur.
48 sg_size_t write(sg_size_t size);
50 /** Allows to store user data on that host */
51 void set_userdata(void *data) {p_userdata = data;}
52 /** Retrieves the previously stored data */
53 void* userdata() {return p_userdata;}
55 void *p_userdata=NULL;
58 /** Retrieve the datasize */
61 /** Sets the file head to the given position. */
62 void seek(sg_size_t pos);
63 /** Retrieves the current file position */
68 * WARNING: It is forbidden to move the file to another mount point */
69 void move(const char*fullpath);
71 /** Remove a file from disk */
74 /* FIXME: add these to the S4U API:
75 XBT_PUBLIC(const char *) MSG_file_get_name(msg_file_t file);
76 XBT_PUBLIC(msg_error_t) MSG_file_rcopy(msg_file_t fd, msg_host_t host, const char* fullpath);
77 XBT_PUBLIC(msg_error_t) MSG_file_rmove(msg_file_t fd, msg_host_t host, const char* fullpath);
82 }} // namespace simgrid::s4u
84 #endif /* SIMGRID_S4U_HOST_HPP */