/*
- 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
#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 <stdint.h>
+#include <pthread.h>
#include <glibmm/threads.h>
#include "pbd/libpbd_visibility.h"
* when something like this is needed (it inherits from EventLoop).
*/
-class LIBPBD_API EventLoop
+class LIBPBD_API EventLoop
{
- public:
- EventLoop() {}
- virtual ~EventLoop() {}
+public:
+ EventLoop (std::string const&);
+ virtual ~EventLoop();
enum RequestType {
range_guarantee = ~0
};
- struct BaseRequestObject;
-
- struct InvalidationRecord {
- std::list<BaseRequestObject*> requests;
- PBD::EventLoop* event_loop;
- const char* file;
- int line;
+ struct BaseRequestObject;
- InvalidationRecord() : event_loop (0) {}
- };
+ struct InvalidationRecord {
+ std::list<BaseRequestObject*> requests;
+ PBD::EventLoop* event_loop;
+ gint _valid;
+ gint _ref;
+ const char* file;
+ int line;
- static void* invalidate_request (void* data);
+ InvalidationRecord() : event_loop (0), _valid (1), _ref (0) {}
+ void invalidate () { g_atomic_int_set (&_valid, 0); }
+ bool valid () { return g_atomic_int_get (&_valid) == 1; }
+
+ void ref () { g_atomic_int_inc (&_ref); }
+ void unref () { g_atomic_int_dec_and_test (&_ref); }
+ bool in_use () { return g_atomic_int_get (&_ref) > 0; }
+ int use_count () { return g_atomic_int_get (&_ref); }
+ };
+
+ static void* invalidate_request (void* data);
struct BaseRequestObject {
- RequestType type;
- bool valid;
- InvalidationRecord* invalidation;
- boost::function<void()> the_slot;
-
- BaseRequestObject() : valid (true), invalidation (0) {}
+ RequestType type;
+ InvalidationRecord* invalidation;
+ boost::function<void()> the_slot;
+
+ BaseRequestObject() : invalidation (0) {}
+ ~BaseRequestObject() {
+ if (invalidation) {
+ invalidation->unref ();
+ }
+ }
};
virtual void call_slot (InvalidationRecord*, const boost::function<void()>&) = 0;
- virtual Glib::Threads::Mutex& slot_invalidation_mutex() = 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);
- private:
- static Glib::Threads::Private<EventLoop> thread_event_loop;
+ 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);
+ std::list<InvalidationRecord*> trash;
+
+private:
+ 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;
};
}