1 | // Copyright (c) 2013 by István Váradi
|
---|
2 |
|
---|
3 | // This file is part of XPLRA, a remote-access plugin for X-Plane
|
---|
4 |
|
---|
5 | // Redistribution and use in source and binary forms, with or without
|
---|
6 | // modification, are permitted provided that the following conditions are met:
|
---|
7 |
|
---|
8 | // 1. Redistributions of source code must retain the above copyright notice, this
|
---|
9 | // list of conditions and the following disclaimer.
|
---|
10 | // 2. Redistributions in binary form must reproduce the above copyright notice,
|
---|
11 | // this list of conditions and the following disclaimer in the documentation
|
---|
12 | // and/or other materials provided with the distribution.
|
---|
13 |
|
---|
14 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
|
---|
15 | // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
---|
16 | // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
---|
17 | // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
|
---|
18 | // ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
---|
19 | // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
---|
20 | // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
---|
21 | // ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
---|
22 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
---|
23 | // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
---|
24 |
|
---|
25 | // The views and conclusions contained in the software and documentation are those
|
---|
26 | // of the authors and should not be interpreted as representing official policies,
|
---|
27 | // either expressed or implied, of the FreeBSD Project.
|
---|
28 |
|
---|
29 | //------------------------------------------------------------------------------
|
---|
30 |
|
---|
31 | #include "RequestQueue.h"
|
---|
32 |
|
---|
33 | #include "Request.h"
|
---|
34 |
|
---|
35 | #include <hu/varadiistvan/xplcommon/Util.h>
|
---|
36 |
|
---|
37 | //------------------------------------------------------------------------------
|
---|
38 |
|
---|
39 | using xplra::RequestQueue;
|
---|
40 |
|
---|
41 | using hu::varadiistvan::xplcommon::Util;
|
---|
42 |
|
---|
43 | //------------------------------------------------------------------------------
|
---|
44 |
|
---|
45 | float RequestQueue::flightLoop(float /*inElapsedSinceLastCall*/,
|
---|
46 | float /*inElapsedTimeSinceLastFlightLoop*/,
|
---|
47 | int /*inCounter*/, void* inRefCon)
|
---|
48 | {
|
---|
49 | RequestQueue* requestQueue = reinterpret_cast<RequestQueue*>(inRefCon);
|
---|
50 | requestQueue->run();
|
---|
51 | #if USE_SCHEDULE_FLIGHTLOOP
|
---|
52 | return 0.0;
|
---|
53 | #else
|
---|
54 | return flightLoopInterval;
|
---|
55 | #endif
|
---|
56 | }
|
---|
57 |
|
---|
58 | //------------------------------------------------------------------------------
|
---|
59 |
|
---|
60 | RequestQueue::RequestQueue() :
|
---|
61 | enabled(true)
|
---|
62 | {
|
---|
63 | #if USE_SCHEDULE_FLIGHTLOOP
|
---|
64 | XPLMCreateFlightLoop_t createFL;
|
---|
65 |
|
---|
66 | createFL.structSize = sizeof(createFL);
|
---|
67 | createFL.phase = xplm_FlightLoop_Phase_AfterFlightModel;
|
---|
68 | createFL.callbackFunc = &flightLoop;
|
---|
69 | createFL.refcon = this;
|
---|
70 |
|
---|
71 | flightLoopID = XPLMCreateFlightLoop(&createFL);
|
---|
72 | #else
|
---|
73 | XPLMRegisterFlightLoopCallback(&flightLoop, flightLoopInterval, this);
|
---|
74 | #endif
|
---|
75 | }
|
---|
76 |
|
---|
77 | //------------------------------------------------------------------------------
|
---|
78 |
|
---|
79 | bool RequestQueue::execute(Request* request)
|
---|
80 | {
|
---|
81 | mutex.lock();
|
---|
82 | if (!enabled) {
|
---|
83 | mutex.unlock();
|
---|
84 | return false;
|
---|
85 | }
|
---|
86 |
|
---|
87 | request->completed = false;
|
---|
88 | requests.push_back(request);
|
---|
89 |
|
---|
90 | #if USE_SCHEDULE_FLIGHTLOOP
|
---|
91 | if (requests.size()==1) {
|
---|
92 | XPLMScheduleFlightLoop(flightLoopID, -2.0, true);
|
---|
93 | }
|
---|
94 | #endif
|
---|
95 |
|
---|
96 | while(enabled && !request->completed) {
|
---|
97 | requestsDone.wait(mutex);
|
---|
98 | }
|
---|
99 |
|
---|
100 | bool result = request->completed;
|
---|
101 |
|
---|
102 | mutex.unlock();
|
---|
103 |
|
---|
104 | return result;
|
---|
105 | }
|
---|
106 |
|
---|
107 | //------------------------------------------------------------------------------
|
---|
108 |
|
---|
109 | void RequestQueue::disable()
|
---|
110 | {
|
---|
111 | mutex.lock();
|
---|
112 | enabled = false;
|
---|
113 | mutex.unlock();
|
---|
114 | requestsDone.broadcast();
|
---|
115 | #if USE_SCHEDULE_FLIGHTLOOP
|
---|
116 | XPLMDestroyFlightLoop(flightLoopID);
|
---|
117 | #else
|
---|
118 | XPLMUnregisterFlightLoopCallback(&flightLoop, this);
|
---|
119 | #endif
|
---|
120 | }
|
---|
121 |
|
---|
122 | //------------------------------------------------------------------------------
|
---|
123 |
|
---|
124 | void RequestQueue::run()
|
---|
125 | {
|
---|
126 | requests_t queuedRequests;
|
---|
127 |
|
---|
128 | mutex.lock();
|
---|
129 | requests.swap(queuedRequests);
|
---|
130 | mutex.unlock();
|
---|
131 |
|
---|
132 | if (queuedRequests.empty()) return;
|
---|
133 |
|
---|
134 | for(requests_t::const_iterator i = queuedRequests.begin();
|
---|
135 | i!=queuedRequests.end(); ++i)
|
---|
136 | {
|
---|
137 | (*i)->execute();
|
---|
138 | }
|
---|
139 |
|
---|
140 | mutex.lock();
|
---|
141 | for(requests_t::const_iterator i = queuedRequests.begin();
|
---|
142 | i!=queuedRequests.end(); ++i)
|
---|
143 | {
|
---|
144 | (*i)->completed = true;
|
---|
145 | }
|
---|
146 | mutex.unlock();
|
---|
147 | requestsDone.broadcast();
|
---|
148 | }
|
---|
149 |
|
---|
150 | //------------------------------------------------------------------------------
|
---|
151 |
|
---|
152 | // Local Variables:
|
---|
153 | // mode: C++
|
---|
154 | // c-basic-offset: 4
|
---|
155 | // indent-tabs-mode: nil
|
---|
156 | // End:
|
---|