#include <boost/function.hpp>
#include <boost/bind.hpp> /* we don't need this here, but anything calling call_slot() probably will, so this is convenient */
-#include <glibmm/thread.h>
+#include <glibmm/threads.h>
namespace PBD
{
+/** An EventLoop is as basic abstraction designed to be used with any "user
+ * interface" (not necessarily graphical) that needs to wait on
+ * events/requests and dispatch/process them as they arrive.
+ *
+ * This is a very basic class that doesn't by itself provide an actual
+ * event loop or thread. See BaseUI for the "real" object to be used
+ * when something like this is needed (it inherits from EventLoop).
+ */
+
class EventLoop
{
public:
EventLoop() {}
virtual ~EventLoop() {}
- virtual void call_slot (const boost::function<void()>&) = 0;
+ enum RequestType {
+ range_guarantee = ~0
+ };
+
+ struct BaseRequestObject;
+
+ struct InvalidationRecord {
+ std::list<BaseRequestObject*> requests;
+ PBD::EventLoop* event_loop;
+ const char* file;
+ int line;
+
+ InvalidationRecord() : event_loop (0) {}
+ };
+
+ static void* invalidate_request (void* data);
+
+ struct BaseRequestObject {
+ RequestType type;
+ bool valid;
+ InvalidationRecord* invalidation;
+ boost::function<void()> the_slot;
+
+ BaseRequestObject() : valid (true), invalidation (0) {}
+ };
+
+ virtual void call_slot (InvalidationRecord*, const boost::function<void()>&) = 0;
+ virtual Glib::Threads::Mutex& slot_invalidation_mutex() = 0;
static EventLoop* get_event_loop_for_thread();
static void set_event_loop_for_thread (EventLoop* ui);
private:
- static Glib::StaticPrivate<EventLoop> thread_event_loop;
+ static Glib::Threads::Private<EventLoop> thread_event_loop;
};
}
+#define MISSING_INVALIDATOR 0 // used to mark places where we fail to provide an invalidator
+
#endif /* __pbd_event_loop_h__ */