asyncUpdate.cpp

Engine/source/platform/async/asyncUpdate.cpp

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Detailed Description

 1
 2//-----------------------------------------------------------------------------
 3// Copyright (c) 2012 GarageGames, LLC
 4//
 5// Permission is hereby granted, free of charge, to any person obtaining a copy
 6// of this software and associated documentation files (the "Software"), to
 7// deal in the Software without restriction, including without limitation the
 8// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 9// sell copies of the Software, and to permit persons to whom the Software is
10// furnished to do so, subject to the following conditions:
11//
12// The above copyright notice and this permission notice shall be included in
13// all copies or substantial portions of the Software.
14//
15// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21// IN THE SOFTWARE.
22//-----------------------------------------------------------------------------
23
24#include "platform/async/asyncUpdate.h"
25#include "core/stream/tStream.h"
26
27
28//-----------------------------------------------------------------------------
29//    AsyncUpdateList implementation.
30//-----------------------------------------------------------------------------
31
32void AsyncUpdateList::process( S32 timeOut )
33{
34   U32 endTime = 0;
35   if( timeOut != -1 )
36      endTime = Platform::getRealMilliseconds() + timeOut;
37
38   // Flush the process list.
39
40   IPolled* ptr;
41   IPolled* firstProcessedPtr = 0;
42
43   while( mUpdateList.tryPopFront( ptr ) )
44   {
45      if( ptr == firstProcessedPtr )
46      {
47         // We've wrapped around.  Stop.
48
49         mUpdateList.pushFront( ptr );
50         break;
51      }
52
53      if( ptr->update() )
54      {
55         mUpdateList.pushBack( ptr );
56
57         if( !firstProcessedPtr )
58            firstProcessedPtr = ptr;
59      }
60
61      // Stop if we have exceeded our processing time budget.
62
63      if( timeOut != -1
64          && Platform::getRealMilliseconds() >= endTime )
65         break;
66   }
67}
68
69//--------------------------------------------------------------------------
70//    AsyncUpdateThread implementation.
71//--------------------------------------------------------------------------
72
73void AsyncUpdateThread::run( void* )
74{
75   _setName( getName() );
76
77   while( !checkForStop() )
78   {
79      _waitForEventAndReset();
80      
81      if( !checkForStop() )
82         mUpdateList->process();
83   }
84}
85