Mercurial > fife-parpg

annotate ext/openal-soft/Alc/alcRing.c @ 295:faabfaf25f15

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Removed the deletion of the search space from the the RoutePatherSearch class. This will fix the path finding so it now will calculate paths correctly. It should not be deleting the search space because it does not own it, it is only using it for calculations. Need to investigate further as to why the memory consumption continually increases when running UH. Also removed the need to store a local pointer in RoutePatherSearch to the singleton instance of a Heuristic, this will eliminate the possibly of having a dangling pointer or deleting something that it shouldn't.
author vtchill@33b003aa-7bff-0310-803a-e67f0ece8222
date Fri, 03 Jul 2009 05:11:54 +0000
parents 4a0efb7baf70
children
rev   line source
0
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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1 /**
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2 * OpenAL cross platform audio library
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3 * Copyright (C) 1999-2007 by authors.
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4 * This library is free software; you can redistribute it and/or
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5 * modify it under the terms of the GNU Library General Public
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6 * License as published by the Free Software Foundation; either
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7 * version 2 of the License, or (at your option) any later version.
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8 *
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9 * This library is distributed in the hope that it will be useful,
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10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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12 * Library General Public License for more details.
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13 *
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14 * You should have received a copy of the GNU Library General Public
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15 * License along with this library; if not, write to the
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16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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17 * Boston, MA 02111-1307, USA.
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18 * Or go to http://www.gnu.org/copyleft/lgpl.html
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19 */
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20
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21 #include "config.h"
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22
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23 #include <string.h>
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24 #include <stdlib.h>
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25
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26 #include "alMain.h"
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27
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28
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29 struct RingBuffer {
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30 ALubyte *mem;
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31
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32 ALsizei frame_size;
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33 ALsizei length;
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34 ALint read_pos;
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35 ALint write_pos;
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36
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37 CRITICAL_SECTION cs;
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38 };
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39
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40
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41 RingBuffer *CreateRingBuffer(ALsizei frame_size, ALsizei length)
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42 {
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43 RingBuffer *ring = calloc(1, sizeof(*ring));
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44 if(ring)
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45 {
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46 ring->frame_size = frame_size;
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47 ring->length = length+1;
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48 ring->write_pos = 1;
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49 ring->mem = malloc((length+1)*frame_size);
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50 if(!ring->mem)
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51 {
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52 free(ring);
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53 ring = NULL;
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54 }
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55
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56 InitializeCriticalSection(&ring->cs);
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57 }
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58 return ring;
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59 }
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60
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61 void DestroyRingBuffer(RingBuffer *ring)
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62 {
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63 if(ring)
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64 {
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65 DeleteCriticalSection(&ring->cs);
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66 free(ring->mem);
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67 free(ring);
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68 }
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69 }
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70
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71 ALsizei RingBufferSize(RingBuffer *ring)
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72 {
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73 return (ring->write_pos-ring->read_pos-1+ring->length) % ring->length;
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74 }
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75
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76 void WriteRingBuffer(RingBuffer *ring, const ALubyte *data, ALsizei len)
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77 {
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78 int remain = ring->length - ring->write_pos;
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79
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80 EnterCriticalSection(&ring->cs);
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81
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82 if((ring->read_pos-ring->write_pos+ring->length)%ring->length < len)
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83 ring->read_pos = (ring->write_pos+len) % ring->length;
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84
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85 if(remain < len)
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86 {
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87 memcpy(ring->mem+(ring->write_pos*ring->frame_size), data, remain*ring->frame_size);
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88 memcpy(ring->mem, data+(remain*ring->frame_size), (len-remain)*ring->frame_size);
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89 }
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90 else
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91 memcpy(ring->mem+(ring->write_pos*ring->frame_size), data, len*ring->frame_size);
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92
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93 ring->write_pos += len;
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94 ring->write_pos %= ring->length;
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95
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96 LeaveCriticalSection(&ring->cs);
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97 }
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98
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99 void ReadRingBuffer(RingBuffer *ring, ALubyte *data, ALsizei len)
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100 {
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101 int remain = ring->length - ring->read_pos;
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102
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103 EnterCriticalSection(&ring->cs);
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104
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105 if(remain < len)
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106 {
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107 memcpy(data, ring->mem+(ring->read_pos*ring->frame_size), remain*ring->frame_size);
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108 memcpy(data+(remain*ring->frame_size), ring->mem, (len-remain)*ring->frame_size);
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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109 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
110 else
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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111 memcpy(data, ring->mem+(ring->read_pos*ring->frame_size), len*ring->frame_size);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
112
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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113 ring->read_pos += len;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
114 ring->read_pos %= ring->length;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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115
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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116 LeaveCriticalSection(&ring->cs);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
117 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
118