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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef UI_WAYLAND_WAYLAND_MESSAGE_PUMP_H_ | |
6 #define UI_WAYLAND_WAYLAND_MESSAGE_PUMP_H_ | |
7 | |
8 #include <glib.h> | |
9 #include <stdint.h> | |
10 | |
11 #include "base/basictypes.h" | |
12 | |
13 namespace ui { | |
14 | |
15 class WaylandDisplay; | |
16 | |
17 // The message pump handles Wayland specific event delivery. This message | |
18 // pump uses the default glib context, so running a glib main loop with the | |
19 // default context will allow looping through Wayland events. | |
20 class WaylandMessagePump { | |
21 public: | |
22 explicit WaylandMessagePump(WaylandDisplay* display); | |
23 virtual ~WaylandMessagePump(); | |
24 | |
25 protected: | |
26 // These are used to process the pump callbacks. | |
27 // HandlePrepare: is called during glib's prepare step and returns a timeout | |
28 // that will be passed to the poll. | |
29 // HandleCheck: called after HandlePrepare and returns whether | |
30 // HandleDispatch should be called. | |
31 // HandleDispatch:is called after HandleCheck returns true and it will | |
32 // dispatch a Wayland event. | |
33 virtual int HandlePrepare(); | |
34 virtual bool HandleCheck(); | |
35 virtual void HandleDispatch(); | |
36 | |
37 private: | |
38 struct WorkSource : public GSource { | |
39 WaylandMessagePump* pump; | |
40 }; | |
41 | |
42 // Actual callbacks for glib. These functions will just call the appropriate | |
43 // Handle* functions in a WaylandMessagePump object. | |
44 static gboolean SourcePrepare(GSource* source, gint* timeout); | |
45 static gboolean SourceCheck(GSource* source); | |
46 static gboolean SourceDispatch(GSource* source, | |
47 GSourceFunc callback, | |
48 gpointer data); | |
49 // Handles updates to the Wayland mask. This is used to signal when the | |
50 // compositor is done processing writable events. | |
51 static int SourceUpdate(uint32_t mask, void* data); | |
52 | |
53 WaylandDisplay* display_; | |
54 WorkSource* source_; | |
55 GPollFD pfd_; | |
56 uint32_t mask_; | |
57 | |
58 DISALLOW_COPY_AND_ASSIGN(WaylandMessagePump); | |
59 }; | |
60 | |
61 } // namespace ui | |
62 | |
63 #endif // UI_WAYLAND_WAYLAND_MESSAGE_PUMP_H_ | |
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