1 /* Copyright (c) 2006-2018. 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 "simgrid/plugins/file_system.h"
10 #include <xbt/Extendable.hpp>
13 #include <simgrid/simix.h>
19 /** @brief A simulated file
21 * Used to simulate the time it takes to access to a file, but does not really store any information.
23 * They are located on @ref simgrid::s4u::Storage that are accessed from a given @ref simgrid::s4u::Host through
25 * For now, you cannot change the mountpoints programatically, and must declare them from your platform file.
27 class XBT_PUBLIC File {
29 File(std::string fullpath, void* userdata);
30 File(std::string fullpath, sg_host_t host, void* userdata);
33 /** Retrieves the path to the file */
34 const char* getPath() { return fullpath_.c_str(); }
36 /** Simulates a local read action. Returns the size of data actually read */
37 sg_size_t read(sg_size_t size);
39 /** Simulates a write action. Returns the size of data actually written. */
40 sg_size_t write(sg_size_t size);
42 /** Allows to store user data on that host */
43 void setUserdata(void* data) { userdata_ = data; }
44 /** Retrieves the previously stored data */
45 void* getUserdata() { return userdata_; }
48 void seek(sg_offset_t pos); /** Sets the file head to the given position. */
49 void seek(sg_offset_t pos, int origin); /** Sets the file head to the given position from a given origin. */
50 sg_size_t tell(); /** Retrieves the current file position */
52 /** Rename a file. WARNING: It is forbidden to move the file to another mount point */
53 void move(std::string fullpath);
54 int remoteCopy(sg_host_t host, const char* fullpath);
55 int remoteMove(sg_host_t host, const char* fullpath);
57 int unlink(); /** Remove a file from the contents of a disk */
61 Storage* localStorage;
62 std::string mount_point_;
67 std::string fullpath_;
68 sg_size_t current_position_ = SEEK_SET;
69 void* userdata_ = nullptr;
72 class XBT_PUBLIC FileSystemStorageExt {
74 static simgrid::xbt::Extension<Storage, FileSystemStorageExt> EXTENSION_ID;
75 explicit FileSystemStorageExt(Storage* ptr);
76 ~FileSystemStorageExt();
77 std::map<std::string, sg_size_t>* parseContent(std::string filename);
78 std::map<std::string, sg_size_t>* getContent() { return content_; }
79 sg_size_t getSize() { return size_; }
80 sg_size_t getUsedSize() { return usedSize_; }
81 void decrUsedSize(sg_size_t size) { usedSize_ -= size; }
82 void incrUsedSize(sg_size_t size) { usedSize_ += size; }
84 std::map<std::string, sg_size_t>* content_;
85 sg_size_t usedSize_ = 0;
89 class XBT_PUBLIC FileDescriptorHostExt {
91 static simgrid::xbt::Extension<Host, FileDescriptorHostExt> EXTENSION_ID;
92 FileDescriptorHostExt() = default;
93 ~FileDescriptorHostExt() { delete file_descriptor_table; }
94 std::vector<int>* file_descriptor_table = nullptr; // Created lazily on need
97 } // namespace simgrid::s4u
99 #endif /* SIMGRID_S4U_HOST_HPP */