blob: 5baa5e04beb55b0ebbfaf02d3c95174b766bef3e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
/*
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
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __pbd_event_loop_h__
#define __pbd_event_loop_h__
#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/threads.h>
#include "pbd/libpbd_visibility.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 LIBPBD_API EventLoop
{
public:
EventLoop() {}
virtual ~EventLoop() {}
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::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__ */
|
