+extern void start_batch_converter ();
+extern void start_player ();
+extern uint64_t thread_id ();
+extern int avio_open_boost (AVIOContext** s, boost::filesystem::path file, int flags);
+extern boost::filesystem::path home_directory ();
+extern bool running_32_on_64 ();
+extern void unprivileged ();
+extern boost::filesystem::path config_path ();
+extern boost::filesystem::path directory_containing_executable ();
+extern boost::filesystem::path fix_long_path (boost::filesystem::path path);
+namespace dcpomatic {
+ std::string get_process_id ();
+}
+
+
+/** @class Waker
+ * @brief A class which tries to keep the computer awake on various operating systems.
+ *
+ * Create a Waker to prevent sleep, and call nudge() every so often (every minute or so).
+ * Destroy the Waker to allow sleep again.
+ */
+class Waker
+{
+public:
+ Waker ();
+ ~Waker ();
+
+ void nudge ();
+
+private:
+ boost::mutex _mutex;
+#ifdef DCPOMATIC_OSX
+ IOPMAssertionID _assertion_id;
+#endif
+};
+
+class Drive
+{
+public:
+ Drive (std::string device, std::vector<boost::filesystem::path> mount_points, uint64_t size, boost::optional<std::string> vendor, boost::optional<std::string> model)
+ : _device(device)
+ , _mount_points(mount_points)
+ , _size(size)
+ , _vendor(vendor)
+ , _model(model)
+ {}
+
+ explicit Drive (std::string);
+
+ std::string as_xml () const;
+
+ std::string description () const;
+
+ std::string device () const {
+ return _device;
+ }
+
+ bool mounted () const {
+ return !_mount_points.empty();
+ }
+
+ std::string log_summary () const;
+
+ /** Unmount any mounted partitions on a drive.
+ * @return true on success, false on failure.
+ */
+ bool unmount ();
+
+ static std::vector<Drive> get ();
+
+private:
+ std::string _device;
+ std::vector<boost::filesystem::path> _mount_points;
+ /** size in bytes */
+ uint64_t _size;
+ boost::optional<std::string> _vendor;
+ boost::optional<std::string> _model;
+};
+
+void disk_write_finished ();
+
+#endif