1 /* Copyright (c) 2017-2023. 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_IO_HPP
7 #define SIMGRID_S4U_IO_HPP
9 #include <simgrid/forward.h>
10 #include <simgrid/s4u/Activity.hpp>
14 namespace simgrid::s4u {
16 /** I/O Activity, representing the asynchronous disk access.
18 * They are generated from Disk::io_init(), Disk::read() Disk::read_async(), Disk::write() and Disk::write_async().
21 class XBT_PUBLIC Io : public Activity_T<Io> {
23 friend kernel::activity::IoImpl;
24 friend kernel::EngineImpl;
28 explicit Io(kernel::activity::IoImplPtr pimpl);
29 Io* do_start() override;
32 enum class OpType { READ, WRITE };
34 /*! \static Initiate the creation of an I/O. Setters have to be called afterwards */
36 /*! \static take a vector of s4u::IoPtr and return when one of them is finished.
37 * The return value is the rank of the first finished IoPtr. */
38 static ssize_t wait_any(const std::vector<IoPtr>& ios) { return wait_any_for(ios, -1); }
39 /*! \static Same as wait_any, but with a timeout. If the timeout occurs, parameter last is returned.*/
40 static ssize_t wait_any_for(const std::vector<IoPtr>& ios, double timeout);
42 double get_remaining() const override;
43 sg_size_t get_performed_ioops() const;
44 IoPtr set_disk(const_sg_disk_t disk);
45 IoPtr set_priority(double priority);
46 IoPtr set_size(sg_size_t size);
47 IoPtr set_op_type(OpType type);
49 static IoPtr streamto_init(Host* from, const Disk* from_disk, Host* to, const Disk* to_disk);
50 static IoPtr streamto_async(Host* from, const Disk* from_disk, Host* to, const Disk* to_disk,
51 uint64_t simulated_size_in_bytes);
52 static void streamto(Host* from, const Disk* from_disk, Host* to, const Disk* to_disk,
53 uint64_t simulated_size_in_bytes);
55 IoPtr set_source(Host* from, const Disk* from_disk);
56 IoPtr set_destination(Host* to, const Disk* to_disk);
58 IoPtr update_priority(double priority);
60 bool is_assigned() const override;
63 } // namespace simgrid::s4u
65 #endif /* SIMGRID_S4U_IO_HPP */