*/
class XBT_PUBLIC Disk : public xbt::Extendable<Disk> {
- kernel::resource::DiskImpl* const pimpl_;
- std::string name_;
+#ifndef DOXYGEN
friend Engine;
friend Io;
friend kernel::resource::DiskImpl;
+#endif
-protected:
-#ifndef DOXYGEN
+ explicit Disk(kernel::resource::DiskImpl* pimpl) : pimpl_(pimpl) {}
virtual ~Disk() = default;
-#endif
+
+ // The private implementation, that never changes
+ kernel::resource::DiskImpl* const pimpl_;
public:
#ifndef DOXYGEN
- explicit Disk(kernel::resource::DiskImpl* pimpl) : pimpl_(pimpl) {}
+ kernel::resource::DiskImpl* get_impl() const { return pimpl_; }
#endif
- /** @brief Callback signal fired when a new Disk is created */
- static xbt::signal<void(Disk&)> on_creation;
- /** @brief Callback signal fired when a Disk is destroyed */
- static xbt::signal<void(Disk const&)> on_destruction;
- /** @brief Callback signal fired when a Disk's state changes */
- static xbt::signal<void(Disk const&)> on_state_change;
-
- /** @brief Retrieves the name of that disk as a C++ string */
- Disk* set_name(std::string const& name);
- std::string const& get_name() const { return name_; }
+ std::string const& get_name() const;
/** @brief Retrieves the name of that disk as a C string */
- const char* get_cname() const { return name_.c_str(); }
+ const char* get_cname() const;
Disk* set_read_bandwidth(double read_bw);
double get_read_bandwidth() const;
const std::unordered_map<std::string, std::string>* get_properties() const;
const char* get_property(const std::string& key) const;
- void set_property(const std::string&, const std::string& value);
- Host* get_host() const;
-
- IoPtr io_init(sg_size_t size, s4u::Io::OpType type);
+ Disk* set_property(const std::string&, const std::string& value);
+ Disk* set_properties(const std::unordered_map<std::string, std::string>& properties);
- IoPtr read_async(sg_size_t size);
- sg_size_t read(sg_size_t size);
+ Disk* set_host(Host* host);
+ Host* get_host() const;
- IoPtr write_async(sg_size_t size);
- sg_size_t write(sg_size_t size);
-#ifndef DOXYGEN
- kernel::resource::DiskImpl* get_impl() const { return pimpl_; }
-#endif
+ Disk* set_state_profile(kernel::profile::Profile* profile);
+ Disk* set_read_bandwidth_profile(kernel::profile::Profile* profile);
+ Disk* set_write_bandwidth_profile(kernel::profile::Profile* profile);
+
+ IoPtr io_init(sg_size_t size, s4u::Io::OpType type) const;
+
+ IoPtr read_async(sg_size_t size) const;
+ sg_size_t read(sg_size_t size) const;
+
+ IoPtr write_async(sg_size_t size) const;
+ sg_size_t write(sg_size_t size) const;
+
+ /** @brief Policy for sharing the disk among activities */
+ enum class SharingPolicy { NONLINEAR = 1, LINEAR = 0 };
+ enum class Operation { READ = 2, WRITE = 1, READWRITE = 0 };
+
+ /**
+ * @brief Describes how the disk is shared between activities for each operation
+ *
+ * Disks have different bandwidths for read and write operations. This method
+ * allows you to set different sharing policies for each operation:
+ * - Read: resource sharing for read operation
+ * - Write: resource sharing for write
+ * - ReadWrite: global sharing for read and write operations
+ *
+ * @param op Operation type
+ * @param policy Sharing policy
+ * @param cb Callback for NONLINEAR policies
+ */
+ Disk* set_sharing_policy(Operation op, SharingPolicy policy, const s4u::NonLinearResourceCb& cb = {});
+ SharingPolicy get_sharing_policy(Operation op) const;
+ /**
+ * @brief Callback to set IO factors
+ *
+ * This callback offers a flexible way to create variability in I/O operations
+ *
+ * @param size I/O operation size in bytes
+ * @param op I/O operation type: read or write
+ * @return Multiply factor
+ */
+ using IoFactorCb = double(sg_size_t size, Io::OpType op);
+ /** @brief Configure the factor callback */
+ Disk* set_factor_cb(const std::function<IoFactorCb>& cb);
+
+ Disk* seal();
+
+ /* The signals */
+ /** @brief Callback signal fired when a new Disk is created */
+ static xbt::signal<void(Disk&)> on_creation;
+ /** @brief Callback signal fired when a Disk is destroyed */
+ static xbt::signal<void(Disk const&)> on_destruction;
+ /** @brief Callback signal fired when a Disk's state changes */
+ static xbt::signal<void(Disk const&)> on_state_change;
};
} // namespace s4u
