Merge master.

[dcpomatic.git] / src / lib / update.h

diff --git a/src/lib/update.h b/src/lib/update.h
index 2063dd4840be698ec4f09351528acc1f634232e5..c86adb8736adad074625f8b7a73dd47ae1eb666e 100644 (file)
--- 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;
 };