Last change
on this file since 1716 was
885,
checked in by rlacroix, 8 years ago
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Ensure the server buffers are large enough so that the corresponding client buffers can always fit.
This helps fixing the issue described in ticket #91.
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Property copyright set to
Software name : XIOS (Xml I/O Server) http://forge.ipsl.jussieu.fr/ioserver Creation date : January 2009 Licence : CeCCIL version2 see license file in root directory : Licence_CeCILL_V2-en.txt or http://www.cecill.info/licences/Licence_CeCILL_V2-en.html Holder : CEA/LSCE (Laboratoire des Sciences du CLimat et de l'Environnement) CNRS/IPSL (Institut Pierre Simon Laplace) Project Manager : Yann Meurdesoif yann.meurdesoif@cea.fr
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Property svn:eol-style set to
native
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File size:
2.8 KB
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1 | #include "xios_spl.hpp" |
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2 | #include "exception.hpp" |
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3 | #include "buffer_server.hpp" |
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4 | |
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5 | |
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6 | namespace xios |
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7 | { |
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8 | |
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9 | CServerBuffer::CServerBuffer(StdSize buffSize) |
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10 | { |
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11 | size = 3 * buffSize; |
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12 | first = 0; |
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13 | current = 1; |
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14 | end = size; |
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15 | buffer = new char[size]; // use MPI_ALLOC_MEM later? |
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16 | } |
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17 | |
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18 | CServerBuffer::~CServerBuffer() |
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19 | { |
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20 | delete [] buffer ; |
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21 | } |
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22 | |
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23 | |
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24 | bool CServerBuffer::isBufferFree(size_t count) |
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25 | { |
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26 | bool ret ; |
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27 | |
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28 | if (count==0) return true ; |
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29 | |
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30 | if (current>first) |
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31 | { |
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32 | if (current+count<size) |
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33 | { |
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34 | ret=true ; |
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35 | } |
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36 | else if (current+count==size) |
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37 | { |
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38 | if (first>0) |
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39 | { |
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40 | ret=true ; |
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41 | } |
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42 | else |
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43 | { |
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44 | ret=false ; |
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45 | } |
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46 | } |
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47 | else |
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48 | { |
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49 | if (count<first) |
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50 | { |
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51 | ret=true ; |
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52 | } |
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53 | else |
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54 | { |
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55 | ret=false ; |
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56 | } |
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57 | } |
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58 | } |
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59 | else |
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60 | { |
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61 | if (current+count<first) |
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62 | { |
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63 | ret=true ; |
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64 | } |
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65 | else |
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66 | { |
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67 | ret=false ; |
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68 | } |
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69 | } |
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70 | |
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71 | return ret ; |
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72 | } |
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73 | |
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74 | |
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75 | void* CServerBuffer::getBuffer(size_t count) |
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76 | { |
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77 | char* ret ; |
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78 | |
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79 | if (count==0) return buffer+current ; |
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80 | |
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81 | if (current>first) |
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82 | { |
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83 | if (current+count<size) |
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84 | { |
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85 | ret=buffer+current ; |
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86 | current+=count ; |
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87 | } |
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88 | else if (current+count==size) |
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89 | { |
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90 | if (first>0) |
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91 | { |
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92 | ret=buffer+current ; |
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93 | current=0 ; |
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94 | } |
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95 | else |
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96 | { |
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97 | ERROR("void* CServerBuffer::getBuffer(size_t count)", |
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98 | <<"cannot allocate required size in buffer") ; |
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99 | } |
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100 | } |
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101 | else |
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102 | { |
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103 | end=current ; |
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104 | if (count<first) |
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105 | { |
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106 | ret=buffer ; |
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107 | current=count ; |
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108 | } |
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109 | else |
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110 | { |
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111 | ERROR("void* CServerBuffer::getBuffer(size_t count)", |
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112 | <<"cannot allocate required size in buffer") ; |
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113 | } |
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114 | } |
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115 | } |
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116 | else |
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117 | { |
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118 | if (current+count<first) |
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119 | { |
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120 | ret=buffer+current ; |
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121 | current+=count ; |
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122 | } |
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123 | else |
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124 | { |
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125 | ERROR("void* CServerBuffer::getBuffer(size_t count)", |
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126 | <<"cannot allocate required size in buffer") ; |
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127 | } |
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128 | } |
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129 | |
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130 | return ret ; |
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131 | } |
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132 | |
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133 | void CServerBuffer::freeBuffer(size_t count) |
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134 | { |
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135 | if (count==0) return ; |
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136 | |
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137 | if (first==end-1) |
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138 | { |
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139 | first=0 ; |
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140 | count-- ; |
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141 | end=size ; |
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142 | } |
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143 | |
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144 | if (first<=current) |
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145 | { |
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146 | if (first+count <current) |
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147 | { |
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148 | first+=count ; |
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149 | } |
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150 | else |
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151 | { |
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152 | ERROR("void CServerBuffer::freeBuffer(size_t count)", |
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153 | <<"cannot free required size in buffer") ; |
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154 | } |
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155 | |
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156 | } |
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157 | else |
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158 | { |
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159 | if (first+count<end) |
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160 | { |
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161 | first+=count ; |
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162 | } |
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163 | else |
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164 | { |
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165 | ERROR("void CServerBuffer::freeBuffer(size_t count)", |
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166 | <<"cannot free required size in buffer") ; |
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167 | } |
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168 | } |
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169 | } |
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170 | |
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171 | } |
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