1 | // Copyright (c) 2012 by István Váradi
|
---|
2 |
|
---|
3 | // This file is part of libxplcommon, a common utility library for
|
---|
4 | // development related to X-Plane
|
---|
5 |
|
---|
6 | // Redistribution and use in source and binary forms, with or without
|
---|
7 | // modification, are permitted provided that the following conditions are met:
|
---|
8 |
|
---|
9 | // 1. Redistributions of source code must retain the above copyright notice, this
|
---|
10 | // list of conditions and the following disclaimer.
|
---|
11 | // 2. Redistributions in binary form must reproduce the above copyright notice,
|
---|
12 | // this list of conditions and the following disclaimer in the documentation
|
---|
13 | // and/or other materials provided with the distribution.
|
---|
14 |
|
---|
15 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
|
---|
16 | // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
---|
17 | // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
---|
18 | // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
|
---|
19 | // ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
---|
20 | // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
---|
21 | // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
---|
22 | // ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
---|
23 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
---|
24 | // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
---|
25 |
|
---|
26 | // The views and conclusions contained in the software and documentation are those
|
---|
27 | // of the authors and should not be interpreted as representing official policies,
|
---|
28 | // either expressed or implied, of the FreeBSD Project.
|
---|
29 |
|
---|
30 | #ifndef XPLCOMMON_POSIX_WAITABLEEVENT_H
|
---|
31 | #define XPLCOMMON_POSIX_WAITABLEEVENT_H
|
---|
32 | //------------------------------------------------------------------------------
|
---|
33 |
|
---|
34 | #include "Waitable.h"
|
---|
35 |
|
---|
36 | #include "../Failable.h"
|
---|
37 |
|
---|
38 | //------------------------------------------------------------------------------
|
---|
39 |
|
---|
40 | namespace xplcommon { namespace posix {
|
---|
41 |
|
---|
42 | //------------------------------------------------------------------------------
|
---|
43 |
|
---|
44 | /**
|
---|
45 | * An event on which one can wait with a waiter.
|
---|
46 | */
|
---|
47 | class WaitableEvent : public Waitable, public Failable
|
---|
48 | {
|
---|
49 | private:
|
---|
50 | /**
|
---|
51 | * Indicate if the event is fired.
|
---|
52 | */
|
---|
53 | volatile bool fired;
|
---|
54 |
|
---|
55 | public:
|
---|
56 | /**
|
---|
57 | * Construct the event.
|
---|
58 | */
|
---|
59 | WaitableEvent(Waiter* waiter = 0);
|
---|
60 |
|
---|
61 | /**
|
---|
62 | * Destroy the event.
|
---|
63 | */
|
---|
64 | virtual ~WaitableEvent();
|
---|
65 |
|
---|
66 | /**
|
---|
67 | * Fire the event.
|
---|
68 | */
|
---|
69 | void fire();
|
---|
70 |
|
---|
71 | /**
|
---|
72 | * Check if the event is fired or not. If so, the fired status
|
---|
73 | * will be cleared.
|
---|
74 | */
|
---|
75 | bool check();
|
---|
76 |
|
---|
77 | protected:
|
---|
78 | /**
|
---|
79 | * Check if the event is fired or not.
|
---|
80 | */
|
---|
81 | virtual bool isReady();
|
---|
82 |
|
---|
83 | /**
|
---|
84 | * Handle the given events.
|
---|
85 | */
|
---|
86 | virtual void handleEvents(short events);
|
---|
87 |
|
---|
88 | private:
|
---|
89 | /**
|
---|
90 | * Perform the real check. If we already know that we are fired,
|
---|
91 | * just return true. Otherwise try to read from the event fd.
|
---|
92 | */
|
---|
93 | bool doCheck(bool fromHandleEvents = false);
|
---|
94 | };
|
---|
95 |
|
---|
96 | //------------------------------------------------------------------------------
|
---|
97 |
|
---|
98 | } /* namespace xplcommon::posix */ } /* namespace xplcommon */
|
---|
99 |
|
---|
100 | //------------------------------------------------------------------------------
|
---|
101 | #endif // XPLCOMMON_POSIX_WAITABLEEVENT_H
|
---|
102 |
|
---|
103 | // Local Variables:
|
---|
104 | // mode: C++
|
---|
105 | // c-basic-offset: 4
|
---|
106 | // indent-tabs-mode: nil
|
---|
107 | // End:
|
---|