+// C++ interface
+//////////////////
+
+#ifdef __cplusplus
+
+namespace simgrid {
+namespace s4u {
+
+/** @brief A simulated file
+ *
+ * Used to simulate the time it takes to access to a file, but does not really store any information.
+ *
+ * They are located on @ref simgrid::s4u::Storage that are accessed from a given @ref simgrid::s4u::Host through
+ * mountpoints.
+ * For now, you cannot change the mountpoints programatically, and must declare them from your platform file.
+ */
+class XBT_PUBLIC File {
+public:
+ File(const std::string& fullpath, void* userdata);
+ File(const std::string& fullpath, sg_host_t host, void* userdata);
+ File(const File&) = delete;
+ File& operator=(const File&) = delete;
+ ~File();
+
+ /** Retrieves the path to the file */
+ const char* get_path() { return fullpath_.c_str(); }
+
+ /** Simulates a local read action. Returns the size of data actually read */
+ sg_size_t read(sg_size_t size);
+
+ /** Simulates a write action. Returns the size of data actually written. */
+ sg_size_t write(sg_size_t size, int write_inside=0);
+
+ /** Allows to store user data on that host */
+ void set_userdata(void* data) { userdata_ = data; }
+ /** Retrieves the previously stored data */
+ void* get_userdata() { return userdata_; }
+
+ sg_size_t size();
+ void seek(sg_offset_t pos); /** Sets the file head to the given position. */
+ void seek(sg_offset_t pos, int origin); /** Sets the file head to the given position from a given origin. */
+ sg_size_t tell(); /** Retrieves the current file position */
+
+ /** Rename a file. WARNING: It is forbidden to move the file to another mount point */
+ void move(const std::string& fullpath);
+ int remote_copy(sg_host_t host, const char* fullpath);
+ int remote_move(sg_host_t host, const char* fullpath);
+
+ int unlink(); /** Remove a file from the contents of a disk */
+ void dump();
+
+ int desc_id = 0;
+ Disk* local_disk_ = nullptr;
+ Storage* local_storage_ = nullptr;
+ std::string mount_point_;
+
+private:
+ sg_size_t size_;
+ std::string path_;
+ std::string fullpath_;
+ sg_size_t current_position_ = SEEK_SET;
+ void* userdata_ = nullptr;
+};
+
+class XBT_PUBLIC FileSystemDiskExt {
+public:
+ static simgrid::xbt::Extension<Disk, FileSystemDiskExt> EXTENSION_ID;
+ explicit FileSystemDiskExt(Disk* ptr);
+ FileSystemDiskExt(const FileSystemDiskExt&) = delete;
+ FileSystemDiskExt& operator=(const FileSystemDiskExt&) = delete;
+ std::map<std::string, sg_size_t>* parse_content(const std::string& filename);
+ std::map<std::string, sg_size_t>* get_content() const { return content_.get(); }
+ const char* get_mount_point() { return mount_point_.c_str(); }
+ const char* get_mount_point(s4u::Host* remote_host) { return remote_mount_points_[remote_host].c_str(); }
+ void add_remote_mount(Host* host, const std::string& mount_point)
+ {
+ remote_mount_points_.insert({host, mount_point});
+ }
+ sg_size_t get_size() const { return size_; }
+ sg_size_t get_used_size() const { return used_size_; }
+ void decr_used_size(sg_size_t size) { used_size_ -= size; }
+ void incr_used_size(sg_size_t size) { used_size_ += size; }
+
+private:
+ std::unique_ptr<std::map<std::string, sg_size_t>> content_;
+ std::map<Host*, std::string> remote_mount_points_;
+ std::string mount_point_;
+ sg_size_t used_size_ = 0;
+ sg_size_t size_ = static_cast<sg_size_t>(500 * 1024) * 1024 * 1024;
+};
+
+class XBT_PUBLIC FileSystemStorageExt {
+public:
+ static simgrid::xbt::Extension<Storage, FileSystemStorageExt> EXTENSION_ID;
+ explicit FileSystemStorageExt(Storage* ptr);
+ FileSystemStorageExt(const FileSystemStorageExt&) = delete;
+ FileSystemStorageExt& operator=(const FileSystemStorageExt&) = delete;
+ std::map<std::string, sg_size_t>* parse_content(const std::string& filename);
+ std::map<std::string, sg_size_t>* get_content() { return content_.get(); }
+ sg_size_t get_size() { return size_; }
+ sg_size_t get_used_size() { return used_size_; }
+ void decr_used_size(sg_size_t size) { used_size_ -= size; }
+ void incr_used_size(sg_size_t size) { used_size_ += size; }
+
+private:
+ std::unique_ptr<std::map<std::string, sg_size_t>> content_;
+ sg_size_t used_size_ = 0;
+ sg_size_t size_ = 0;
+};
+
+class XBT_PUBLIC FileDescriptorHostExt {
+public:
+ static simgrid::xbt::Extension<Host, FileDescriptorHostExt> EXTENSION_ID;
+ FileDescriptorHostExt() = default;
+ FileDescriptorHostExt(const FileDescriptorHostExt&) = delete;
+ FileDescriptorHostExt& operator=(const FileDescriptorHostExt&) = delete;
+ std::unique_ptr<std::vector<int>> file_descriptor_table = nullptr; // Created lazily on need
+};
+} // namespace s4u
+} // namespace simgrid
+#endif