X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fdisk_writer_messages.h;h=2fa225d851a5d9624003fa21b01007cf49582301;hb=HEAD;hp=d31a9cb0ad50c8b63455280b4150d77360bbbed1;hpb=e28f10cd045d3a420689c9aafc5abaa64d35fa92;p=dcpomatic.git

diff --git a/src/lib/disk_writer_messages.h b/src/lib/disk_writer_messages.h
index d31a9cb0a..2fa225d85 100644
--- a/src/lib/disk_writer_messages.h
+++ b/src/lib/disk_writer_messages.h
@@ -18,11 +18,29 @@
 
 */
 
+
+#include <boost/optional.hpp>
+#include <string>
+
+
+class Nanomsg;
+
+
 /* We have the front-end application dcpomatic2_disk and the back-end
  * dcpomatic2_disk_writer.  The communication is line-based, separated
  * by \n.
  */
 
+/* PING */
+
+// Front-end sends:
+
+#define DISK_WRITER_PING "P"
+
+// Back-end responds
+
+#define DISK_WRITER_PONG "O"
+
 /* REQUEST TO WRITE DCP */
 
 // Front-end sends:
@@ -40,9 +58,11 @@
 #define DISK_WRITER_ERROR "E"
 // Error message
 // Error number
+// Additional error number (a platform-specific error from lwext4)
 
-// the drive is being formatted
-#define DISK_WRITER_FORMATTING "F"
+// the drive is being formatted, 40% done
+#define DISK_WRITER_FORMAT_PROGRESS "F"
+// 0.4\n
 
 // data is being copied, 30% done
 #define DISK_WRITER_COPY_PROGRESS "C"
@@ -70,3 +90,86 @@
 // or
 // DISK_WRITER_ERROR
 
+
+class DiskWriterBackEndResponse
+{
+public:
+	enum class Type {
+		OK,
+		ERROR,
+		PONG,
+		FORMAT_PROGRESS,
+		COPY_PROGRESS,
+		VERIFY_PROGRESS
+	};
+
+	static DiskWriterBackEndResponse ok() {
+		return DiskWriterBackEndResponse(Type::OK);
+	}
+
+	static DiskWriterBackEndResponse error(std::string message, int ext4_number, int platform_number) {
+		auto r = DiskWriterBackEndResponse(Type::ERROR);
+		r._error_message = message;
+		r._ext4_error_number = ext4_number;
+		r._platform_error_number = platform_number;
+		return r;
+	}
+
+	static DiskWriterBackEndResponse pong() {
+		return DiskWriterBackEndResponse(Type::PONG);
+	}
+
+	static DiskWriterBackEndResponse format_progress(float p) {
+		auto r = DiskWriterBackEndResponse(Type::FORMAT_PROGRESS);
+		r._progress = p;
+		return r;
+	}
+
+	static DiskWriterBackEndResponse copy_progress(float p) {
+		auto r = DiskWriterBackEndResponse(Type::COPY_PROGRESS);
+		r._progress = p;
+		return r;
+	}
+
+	static DiskWriterBackEndResponse verify_progress(float p) {
+		auto r = DiskWriterBackEndResponse(Type::VERIFY_PROGRESS);
+		r._progress = p;
+		return r;
+	}
+
+	static boost::optional<DiskWriterBackEndResponse> read_from_nanomsg(Nanomsg& nanomsg, int timeout);
+
+	bool write_to_nanomsg(Nanomsg& nanomsg, int timeout) const;
+
+	Type type() const {
+		return _type;
+	}
+
+	std::string error_message() const {
+		return _error_message;
+	}
+
+	int ext4_error_number() const {
+		return _ext4_error_number;
+	}
+
+	int platform_error_number() const {
+		return _platform_error_number;
+	}
+
+	float progress() const {
+		return _progress;
+	}
+
+private:
+	DiskWriterBackEndResponse(Type type)
+		: _type(type)
+	{}
+
+	Type _type;
+	std::string _error_message;
+	int _ext4_error_number = 0;
+	int _platform_error_number = 0;
+	float _progress = 0;
+};
+