Last change
on this file since 1095 was
1085,
checked in by yushan, 7 years ago
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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
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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 | namespace xios |
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6 | { |
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7 | |
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8 | CServerBuffer::CServerBuffer(StdSize buffSize) |
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9 | { |
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10 | size = 3 * buffSize; |
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11 | first = 0; |
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12 | current = 1; |
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13 | end = size; |
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14 | buffer = new char[size]; // use MPI_ALLOC_MEM later? |
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15 | } |
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16 | |
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17 | CServerBuffer::~CServerBuffer() |
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18 | { |
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19 | delete [] buffer ; |
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20 | } |
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21 | |
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22 | |
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23 | bool CServerBuffer::isBufferFree(size_t count) |
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24 | { |
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25 | bool ret ; |
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26 | |
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27 | if (count==0) return true ; |
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28 | |
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29 | if (current>first) |
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30 | { |
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31 | if (current+count<size) |
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32 | { |
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33 | ret=true ; |
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34 | } |
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35 | else if (current+count==size) |
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36 | { |
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37 | if (first>0) |
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38 | { |
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39 | ret=true ; |
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40 | } |
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41 | else |
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42 | { |
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43 | ret=false ; |
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44 | } |
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45 | } |
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46 | else |
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47 | { |
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48 | if (count<first) |
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49 | { |
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50 | ret=true ; |
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51 | } |
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52 | else |
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53 | { |
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54 | ret=false ; |
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55 | } |
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56 | } |
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57 | } |
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58 | else |
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59 | { |
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60 | if (current+count<first) |
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61 | { |
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62 | ret=true ; |
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63 | } |
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64 | else |
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65 | { |
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66 | ret=false ; |
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67 | } |
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68 | } |
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69 | |
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70 | return ret ; |
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71 | } |
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72 | |
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73 | |
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74 | void* CServerBuffer::getBuffer(size_t count) |
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75 | { |
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76 | char* ret ; |
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77 | |
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78 | if (count==0) return buffer+current ; |
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79 | |
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80 | if (current>first) |
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81 | { |
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82 | if (current+count<size) |
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83 | { |
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84 | ret=buffer+current ; |
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85 | current+=count ; |
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86 | } |
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87 | else if (current+count==size) |
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88 | { |
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89 | if (first>0) |
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90 | { |
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91 | ret=buffer+current ; |
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92 | current=0 ; |
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93 | } |
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94 | else |
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95 | { |
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96 | ERROR("void* CServerBuffer::getBuffer(size_t count)", |
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97 | <<"cannot allocate required size in buffer") ; |
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98 | } |
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99 | } |
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100 | else |
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101 | { |
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102 | end=current ; |
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103 | if (count<first) |
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104 | { |
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105 | ret=buffer ; |
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106 | current=count ; |
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107 | } |
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108 | else |
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109 | { |
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110 | ERROR("void* CServerBuffer::getBuffer(size_t count)", |
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111 | <<"cannot allocate required size in buffer") ; |
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112 | } |
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113 | } |
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114 | } |
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115 | else |
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116 | { |
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117 | if (current+count<first) |
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118 | { |
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119 | ret=buffer+current ; |
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120 | current+=count ; |
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121 | } |
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122 | else |
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123 | { |
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124 | ERROR("void* CServerBuffer::getBuffer(size_t count)", |
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125 | <<"cannot allocate required size in buffer") ; |
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126 | } |
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127 | } |
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128 | |
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129 | return ret ; |
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130 | } |
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131 | |
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132 | void CServerBuffer::freeBuffer(size_t count) |
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133 | { |
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134 | if (count==0) return ; |
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135 | |
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136 | if (first==end-1) |
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137 | { |
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138 | first=0 ; |
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139 | count-- ; |
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140 | end=size ; |
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141 | } |
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142 | |
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143 | if (first<=current) |
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144 | { |
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145 | if (first+count <current) |
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146 | { |
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147 | first+=count ; |
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148 | } |
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149 | else |
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150 | { |
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151 | ERROR("void CServerBuffer::freeBuffer(size_t count)", |
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152 | <<"cannot free required size in buffer") ; |
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153 | } |
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154 | |
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155 | } |
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156 | else |
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157 | { |
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158 | if (first+count<end) |
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159 | { |
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160 | first+=count ; |
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161 | } |
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162 | else |
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163 | { |
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164 | ERROR("void CServerBuffer::freeBuffer(size_t count)", |
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165 | <<"cannot free required size in buffer") ; |
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166 | } |
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167 | } |
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168 | } |
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169 | |
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170 | } |
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