1 | #include "xmlioserver_spl.hpp" |
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2 | #include "exception.hpp" |
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3 | #include "buffer_server.hpp" |
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4 | #include "cxios.hpp" |
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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(void) |
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10 | { |
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11 | bufferSizeByClient=CXios::bufferSize*CXios::bufferServerFactorSize ; |
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12 | size=bufferSizeByClient ; |
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13 | first=0 ; |
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14 | current=1 ; |
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15 | end=size ; |
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16 | buffer=new char[size] ; // change later for MPI_ALLOC_MEM later |
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17 | } |
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18 | |
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19 | CServerBuffer::~CServerBuffer() |
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20 | { |
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21 | delete [] buffer ; |
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22 | } |
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23 | |
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24 | |
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25 | bool CServerBuffer::isBufferFree(size_t count) |
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26 | { |
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27 | bool ret ; |
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28 | |
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29 | if (count==0) return true ; |
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30 | |
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31 | if (current>first) |
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32 | { |
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33 | if (current+count<size) |
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34 | { |
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35 | ret=true ; |
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36 | } |
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37 | else if (current+count==size) |
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38 | { |
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39 | if (first>0) |
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40 | { |
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41 | ret=true ; |
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42 | } |
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43 | else |
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44 | { |
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45 | ret=false ; |
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46 | } |
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47 | } |
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48 | else |
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49 | { |
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50 | if (count<first) |
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51 | { |
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52 | ret=true ; |
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53 | } |
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54 | else |
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55 | { |
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56 | ret=false ; |
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57 | } |
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58 | } |
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59 | } |
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60 | else |
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61 | { |
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62 | if (current+count<first) |
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63 | { |
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64 | ret=true ; |
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65 | } |
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66 | else |
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67 | { |
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68 | ret=false ; |
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69 | } |
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70 | } |
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71 | |
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72 | return ret ; |
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73 | } |
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74 | |
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75 | |
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76 | void* CServerBuffer::getBuffer(size_t count) |
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77 | { |
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78 | char* ret ; |
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79 | |
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80 | if (count==0) return buffer+current ; |
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81 | |
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82 | if (current>first) |
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83 | { |
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84 | if (current+count<size) |
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85 | { |
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86 | ret=buffer+current ; |
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87 | current+=count ; |
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88 | } |
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89 | else if (current+count==size) |
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90 | { |
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91 | if (first>0) |
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92 | { |
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93 | ret=buffer+current ; |
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94 | current=0 ; |
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95 | } |
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96 | else |
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97 | { |
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98 | ERROR("void* CServerBuffer::getBuffer(size_t count)", |
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99 | <<"cannot allocate required size in buffer") ; |
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100 | } |
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101 | } |
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102 | else |
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103 | { |
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104 | end=current ; |
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105 | if (count<first) |
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106 | { |
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107 | ret=buffer ; |
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108 | current=count ; |
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109 | } |
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110 | else |
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111 | { |
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112 | ERROR("void* CServerBuffer::getBuffer(size_t count)", |
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113 | <<"cannot allocate required size in buffer") ; |
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114 | } |
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115 | } |
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116 | } |
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117 | else |
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118 | { |
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119 | if (current+count<first) |
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120 | { |
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121 | ret=buffer+current ; |
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122 | current+=count ; |
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123 | } |
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124 | else |
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125 | { |
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126 | ERROR("void* CServerBuffer::getBuffer(size_t count)", |
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127 | <<"cannot allocate required size in buffer") ; |
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128 | } |
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129 | } |
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130 | |
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131 | return ret ; |
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132 | } |
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133 | |
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134 | void CServerBuffer::freeBuffer(size_t count) |
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135 | { |
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136 | if (count==0) return ; |
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137 | |
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138 | if (first==end-1) |
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139 | { |
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140 | first=0 ; |
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141 | count-- ; |
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142 | end=size ; |
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143 | } |
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144 | |
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145 | if (first<=current) |
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146 | { |
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147 | if (first+count <current) |
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148 | { |
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149 | first+=count ; |
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150 | } |
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151 | else |
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152 | { |
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153 | ERROR("void CServerBuffer::freeBuffer(size_t count)", |
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154 | <<"cannot free required size in buffer") ; |
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155 | } |
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156 | |
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157 | } |
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158 | else |
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159 | { |
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160 | if (first+count<end) |
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161 | { |
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162 | first+=count ; |
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163 | } |
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164 | else |
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165 | { |
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166 | ERROR("void CServerBuffer::freeBuffer(size_t count)", |
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167 | <<"cannot free required size in buffer") ; |
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168 | } |
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169 | } |
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170 | } |
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171 | |
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172 | } |
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