X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fpbd%2Fpbd%2Fevent_loop.h;h=b6e07b44de1308fa6dbffd747a0d0b6b6b15ed82;hb=ae4e84fd51daa868f6f5f457935c2c186a2bb659;hp=be98fcd852a771a5d43b5b19ae44a05ae1ed05e4;hpb=f450df300c9c057141a4caf79ff6dbfbf58492d9;p=ardour.git

diff --git a/libs/pbd/pbd/event_loop.h b/libs/pbd/pbd/event_loop.h
index be98fcd852..b6e07b44de 100644
--- a/libs/pbd/pbd/event_loop.h
+++ b/libs/pbd/pbd/event_loop.h
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2009 Paul Davis 
+    Copyright (C) 2009 Paul Davis
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -20,29 +20,108 @@
 #ifndef __pbd_event_loop_h__
 #define __pbd_event_loop_h__
 
+#include <string>
+#include <vector>
+#include <map>
 #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 <stdint.h>
+#include <pthread.h>
+#include <glibmm/threads.h>
+
+#include "pbd/libpbd_visibility.h"
 
 namespace PBD
 {
 
-class EventLoop 
+/** 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 LIBPBD_API EventLoop
 {
   public:
-	EventLoop() {}
+	EventLoop (std::string const&);
 	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;
+
+        std::string event_loop_name() const { return _name; }
 
 	static EventLoop* get_event_loop_for_thread();
 	static void set_event_loop_for_thread (EventLoop* ui);
 
+	struct ThreadBufferMapping {
+		pthread_t emitting_thread;
+		std::string target_thread_name;
+		void* request_buffer;
+	};
+
+	static std::vector<ThreadBufferMapping> get_request_buffers_for_target_thread (const std::string&);
+
+	static void register_request_buffer_factory (const std::string& target_thread_name, void* (*factory) (uint32_t));
+	static void pre_register (const std::string& emitting_thread_name, uint32_t num_requests);
+	static void remove_request_buffer_from_map (void* ptr);
+
   private:
-	static Glib::StaticPrivate<EventLoop> thread_event_loop;
+        static Glib::Threads::Private<EventLoop> thread_event_loop;
+	std::string _name;
 
+	typedef std::map<std::string,ThreadBufferMapping> ThreadRequestBufferList;
+	static ThreadRequestBufferList thread_buffer_requests;
+	static Glib::Threads::RWLock   thread_buffer_requests_lock;
+
+	struct RequestBufferSupplier {
+
+		/* @param name : name of object/entity that will/may accept
+		   requests from other threads, via a request buffer.
+		*/
+		std::string name;
+
+		/* @param factory : a function that can be called (with an
+		   argument specifying the @param number_of_requests) to create and
+		   return a request buffer for communicating with @param name)
+		*/
+		void* (*factory)(uint32_t nunber_of_requests);
+	};
+	typedef std::vector<RequestBufferSupplier> RequestBufferSuppliers;
+	static RequestBufferSuppliers request_buffer_suppliers;
 };
 
 }
 
+#define MISSING_INVALIDATOR 0 // used to mark places where we fail to provide an invalidator
+
 #endif /* __pbd_event_loop_h__ */