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1 //========================================================================== |
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2 // |
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3 // memvar.cxx |
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4 // |
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5 // Memory pool with variable block class declarations |
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6 // |
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7 //========================================================================== |
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8 //####COPYRIGHTBEGIN#### |
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9 // |
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10 // ------------------------------------------- |
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11 // The contents of this file are subject to the Cygnus eCos Public License |
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12 // Version 1.0 (the "License"); you may not use this file except in |
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13 // compliance with the License. You may obtain a copy of the License at |
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14 // http://sourceware.cygnus.com/ecos |
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15 // |
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16 // Software distributed under the License is distributed on an "AS IS" |
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the |
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18 // License for the specific language governing rights and limitations under |
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19 // the License. |
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20 // |
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21 // The Original Code is eCos - Embedded Cygnus Operating System, released |
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22 // September 30, 1998. |
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23 // |
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24 // The Initial Developer of the Original Code is Cygnus. Portions created |
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25 // by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions. All Rights Reserved. |
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26 // ------------------------------------------- |
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27 // |
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28 //####COPYRIGHTEND#### |
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29 //========================================================================== |
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30 //#####DESCRIPTIONBEGIN#### |
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31 // |
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32 // Author(s): dsm |
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33 // Contributors: dsm |
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34 // Date: 1998-05-22 |
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35 // Description: |
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36 // Usage: #include <cyg/kernel/memvar.hxx> |
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37 // |
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38 // |
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39 //####DESCRIPTIONEND#### |
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40 // |
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41 //========================================================================== |
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42 |
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43 #include <pkgconf/kernel.h> |
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44 |
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45 #include <cyg/kernel/ktypes.h> // base kernel types |
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46 #include <cyg/infra/cyg_trac.h> // tracing macros |
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47 #include <cyg/infra/cyg_ass.h> // assertion macros |
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48 #include <cyg/kernel/instrmnt.h> // instrumentation |
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49 |
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50 #include <cyg/kernel/memvar.hxx> |
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51 |
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52 // implementation that we want to make concrete |
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53 #ifdef CYGIMP_MEM_USE_MEMPOOLT_PLAIN |
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54 #include <cyg/kernel/mempoolt.inl> // kernel safe mempool template |
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55 #else |
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56 #include <cyg/kernel/mempolt2.inl> // kernel safe mempool template |
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57 #endif |
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58 |
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59 #include <cyg/kernel/mvarimpl.inl> // mem pool implementation |
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60 |
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61 // ------------------------------------------------------------------------- |
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62 // debugging/assert function |
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63 |
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64 #ifdef CYGDBG_USE_ASSERTS |
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65 cyg_bool |
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66 Cyg_Mempool_Variable::check_this(cyg_assert_class_zeal zeal) const |
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67 { |
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68 CYG_REPORT_FUNCTION(); |
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69 // check that we have a non-NULL pointer first |
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70 if( this == NULL ) return false; |
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71 return mypool.check_this( zeal ); |
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72 } |
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73 #endif |
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74 |
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75 // ------------------------------------------------------------------------- |
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76 // Constructor: gives the base and size of the arena in which memory is |
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77 // to be carved out |
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78 Cyg_Mempool_Variable::Cyg_Mempool_Variable( |
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79 cyg_uint8 *base, |
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80 cyg_int32 size) |
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81 : mypool( base, size, (CYG_ADDRWORD)4 ) |
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82 { |
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83 } |
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84 |
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85 // Destructor |
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86 Cyg_Mempool_Variable::~Cyg_Mempool_Variable() |
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87 { |
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88 } |
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89 |
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90 // ------------------------------------------------------------------------- |
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91 // get some memory; wait if none available |
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92 cyg_uint8 * |
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93 Cyg_Mempool_Variable::alloc(cyg_int32 size) |
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94 { |
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95 return mypool.alloc( size ); |
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96 } |
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97 |
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98 #ifdef CYGFUN_KERNEL_THREADS_TIMER |
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99 // get some memory with a timeout |
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100 cyg_uint8 * |
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101 Cyg_Mempool_Variable::alloc(cyg_int32 size, cyg_tick_count delay_timeout ) |
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102 { |
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103 return mypool.alloc( size , delay_timeout ); |
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104 } |
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105 #endif |
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106 |
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107 // get some memory, return NULL if none available |
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108 cyg_uint8 * |
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109 Cyg_Mempool_Variable::try_alloc(cyg_int32 size) |
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110 { |
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111 return mypool.try_alloc( size ); |
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112 } |
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113 |
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114 // free the memory back to the pool |
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115 cyg_bool |
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116 Cyg_Mempool_Variable::free( cyg_uint8 *p, cyg_int32 size ) |
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117 { |
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118 return mypool.free( p, size ); |
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119 } |
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120 |
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121 // is anyone waiting for memory? |
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122 cyg_bool |
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123 Cyg_Mempool_Variable::waiting() |
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124 { |
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125 return mypool.waiting(); |
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126 } |
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127 |
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128 // read the fixed allocation size (will be -1 as variable) |
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129 cyg_int32 |
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130 Cyg_Mempool_Variable::get_blocksize() |
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131 { |
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132 return mypool.get_blocksize(); |
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133 } |
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134 |
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135 // these two are obvious and generic |
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136 cyg_int32 |
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137 Cyg_Mempool_Variable::get_totalmem() { |
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138 return mypool.get_totalmem(); |
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139 } |
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140 cyg_int32 |
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141 Cyg_Mempool_Variable::get_freemem() { |
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142 return mypool.get_freemem(); |
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143 } |
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144 |
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145 // get information about the construction parameters for external |
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146 // freeing after the destruction of the holding object |
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147 void |
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148 Cyg_Mempool_Variable::get_arena( |
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149 cyg_uint8 * &base, cyg_int32 &size, CYG_ADDRWORD &maxfree ) |
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150 { |
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151 mypool.get_arena( base, size, maxfree ); |
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152 } |
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153 |
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154 // Return the size of the memory allocation (previously returned |
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155 // by alloc() or try_alloc() ) at ptr. Returns -1 if not found |
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156 cyg_int32 |
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157 Cyg_Mempool_Variable::get_allocation_size( cyg_uint8 *ptr ) |
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158 { |
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159 return mypool.get_allocation_size( ptr ); |
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160 } |
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161 |
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162 // ------------------------------------------------------------------------- |
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163 |
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164 // End of memvar.cxx |
