X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fupdate.h;h=c86adb8736adad074625f8b7a73dd47ae1eb666e;hb=391d85619ac19a2a93696ddc35c222eb9bb5d9d6;hp=2063dd4840be698ec4f09351528acc1f634232e5;hpb=95faa6568854b5f861db07e9b8697169aaceec3c;p=dcpomatic.git

diff --git a/src/lib/update.h b/src/lib/update.h
index 2063dd484..c86adb873 100644
--- a/src/lib/update.h
+++ b/src/lib/update.h
@@ -17,23 +17,81 @@
 
 */
 
+/** @file  src/lib/update.h
+ *  @brief UpdateChecker class.
+ */
+
+#include <boost/signals2.hpp>
+#include <boost/thread/mutex.hpp>
+#include <boost/thread/condition.hpp>
+#include <boost/thread.hpp>
+#include <curl/curl.h>
+
+/** Class to check for the existance of an update for DCP-o-matic on a remote server */
 class UpdateChecker
 {
 public:
 	UpdateChecker ();
 	~UpdateChecker ();
 
-	enum Result {
-		YES,
-		MAYBE,
-		NO
+	void run ();
+
+	enum State {
+		YES,    ///< there is an update
+		FAILED, ///< the check failed, so we don't know
+		NO,     ///< there is no update
+		NOT_RUN ///< the check has not been run (yet)
 	};
 
-	Result run ();
+	/** @return state of the checker */
+	State state () {
+		boost::mutex::scoped_lock lm (_data_mutex);
+		return _state;
+	}
+	
+	/** @return the version string of the latest stable version (if _state == YES or NO) */
+	std::string stable () {
+		boost::mutex::scoped_lock lm (_data_mutex);
+		return _stable;
+	}
+
+	/** @return the version string of the latest test version (if _state == YES or NO) */
+	std::string test () {
+		boost::mutex::scoped_lock lm (_data_mutex);
+		return _test;
+	}
+	
+	/** @return true if the last signal emission was the first */
+	bool last_emit_was_first () const {
+		boost::mutex::scoped_lock lm (_data_mutex);
+		return _emits == 1;
+	}
 
 	size_t write_callback (void *, size_t, size_t);
 
+	boost::signals2::signal<void (void)> StateChanged;
+
+	static UpdateChecker* instance ();
+
 private:	
+	static UpdateChecker* _instance;
+
+	void set_state (State);
+	void thread ();
+
 	char* _buffer;
 	int _offset;
+	CURL* _curl;
+
+	/** mutex to protect _state, _stable, _test and _emits */
+	mutable boost::mutex _data_mutex;
+	State _state;
+	std::string _stable;
+	std::string _test;
+	int _emits;
+
+	boost::thread* _thread;
+	boost::mutex _process_mutex;
+	boost::condition _condition;
+	int _to_do;
 };