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annotate packages/services/memalloc/common/current/include/memjoin.inl @ 3185:543f9e6905da

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* include/memjoin.inl: Fix compiler warning about variable that is set but never referenced when CYG_ASSERT isn't used.
author jlarmour
date Sat, 16 Jun 2012 01:18:00 +0000
parents 74dbf4c3f2e1
children
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1 #ifndef CYGONCE_MEMALLOC_MEMJOIN_INL
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2 #define CYGONCE_MEMALLOC_MEMJOIN_INL
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3
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4 //==========================================================================
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5 //
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6 // memjoin.inl
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7 //
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8 // Pseudo memory pool used to join together other memory pools
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9 //
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10 //==========================================================================
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11 // ####ECOSGPLCOPYRIGHTBEGIN####
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12 // -------------------------------------------
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13 // This file is part of eCos, the Embedded Configurable Operating System.
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14 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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15 //
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16 // eCos is free software; you can redistribute it and/or modify it under
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17 // the terms of the GNU General Public License as published by the Free
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18 // Software Foundation; either version 2 or (at your option) any later
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19 // version.
208
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20 //
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21 // eCos is distributed in the hope that it will be useful, but WITHOUT
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22 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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23 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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24 // for more details.
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25 //
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26 // You should have received a copy of the GNU General Public License
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27 // along with eCos; if not, write to the Free Software Foundation, Inc.,
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28 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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29 //
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30 // As a special exception, if other files instantiate templates or use
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31 // macros or inline functions from this file, or you compile this file
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32 // and link it with other works to produce a work based on this file,
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33 // this file does not by itself cause the resulting work to be covered by
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34 // the GNU General Public License. However the source code for this file
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35 // must still be made available in accordance with section (3) of the GNU
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36 // General Public License v2.
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37 //
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38 // This exception does not invalidate any other reasons why a work based
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39 // on this file might be covered by the GNU General Public License.
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40 // -------------------------------------------
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41 // ####ECOSGPLCOPYRIGHTEND####
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42 //==========================================================================
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43 //#####DESCRIPTIONBEGIN####
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44 //
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45 // Author(s): jlarmour
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46 // Contributors:
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47 // Date: 2000-06-12
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48 // Purpose: Implement joined up memory pool class interface
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49 // Description: Inline class for constructing a pseudo allocator that contains
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50 // multiple other allocators. It caters solely to the requirements
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51 // of the malloc implementation.
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52 // Usage: #include <cyg/memalloc/memjoin.hxx>
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53 //
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54 //
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55 //####DESCRIPTIONEND####
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56 //
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57 //==========================================================================
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58
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59 // CONFIGURATION
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60
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61 #include <pkgconf/memalloc.h>
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62
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63 // INCLUDES
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64
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65 #include <cyg/infra/cyg_type.h> // types
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66 #include <cyg/infra/cyg_ass.h> // assertion macros
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67 #include <cyg/infra/cyg_trac.h> // tracing macros
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68 #include <cyg/memalloc/memjoin.hxx> // header for this file just in case
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69
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70
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71 // FUNCTIONS
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72
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73
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74 // -------------------------------------------------------------------------
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75 // find_pool_for_ptr returns the pool that ptr came from
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76
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77 template <class T>
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78 inline T *
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79 Cyg_Mempool_Joined<T>::find_pool_for_ptr( const cyg_uint8 *ptr )
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80 {
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81 cyg_uint8 i;
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82
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83 for ( i=0; i < poolcount; i++ ) {
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84 if ( ptr >= pools[i].startaddr &&
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85 ptr < pools[i].endaddr ) {
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86 return pools[i].pool;
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87 } // if
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88 } // for
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89 return NULL;
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90 } // Cyg_Mempool_Joined<T>::find_pool_for_ptr()
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91
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92
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93 // -------------------------------------------------------------------------
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94 // Constructor
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95 template <class T>
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96 inline
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97 Cyg_Mempool_Joined<T>::Cyg_Mempool_Joined( cyg_uint8 num_heaps, T *heaps[] )
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98 {
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99 Cyg_Mempool_Status stat;
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100 cyg_uint8 i;
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101
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102 CYG_REPORT_FUNCTION();
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103 CYG_REPORT_FUNCARG2( "num_heaps=%u, heaps=%08x", (int)num_heaps, heaps );
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104
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105 CYG_CHECK_DATA_PTRC( heaps );
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106
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107 poolcount = num_heaps;
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108
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109 // allocate internal structures - this should work because we should be
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110 // the first allocation for this pool; and if there isn't enough space
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111 // for these teeny bits, what hope is there!
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112 for (i=0; i<num_heaps; i++) {
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113 pools = (struct pooldesc *)
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114 heaps[i]->try_alloc( num_heaps * sizeof(struct pooldesc) );
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115 if ( NULL != pools )
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116 break;
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117 } // for
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118
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119 CYG_ASSERT( pools != NULL,
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120 "Couldn't allocate internal structures from any pools!");
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121
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122 // now set up internal structures
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123 for (i=0; i<num_heaps; i++) {
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124 pools[i].pool = heaps[i];
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125 heaps[i]->get_status( CYG_MEMPOOL_STAT_ARENABASE|
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126 CYG_MEMPOOL_STAT_ARENASIZE,
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127 stat );
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128
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129 CYG_ASSERT( stat.arenabase != (const cyg_uint8 *)-1,
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130 "pool returns valid pool base" );
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131 CYG_CHECK_DATA_PTR( stat.arenabase, "Bad arena location" );
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132 CYG_ASSERT( stat.arenasize > 0, "pool returns valid pool size" );
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133
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134 pools[i].startaddr = stat.arenabase;
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135 pools[i].endaddr = stat.arenabase + stat.arenasize;
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136 } // for
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137
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138 CYG_REPORT_RETURN();
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139 } // Cyg_Mempool_Joined<T>::Cyg_Mempool_Joined()
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140
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141
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142
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143 // -------------------------------------------------------------------------
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144 // Destructor
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145 template <class T>
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146 inline
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147 Cyg_Mempool_Joined<T>::~Cyg_Mempool_Joined()
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148 {
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149 CYG_REPORT_FUNCTION();
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150 CYG_REPORT_FUNCARGVOID();
165
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151
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152 cyg_bool freestat CYGBLD_ATTRIB_UNUSED;
165
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153
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154 freestat = free( (cyg_uint8 *)pools, poolcount * sizeof(struct pooldesc) );
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155 CYG_ASSERT( freestat, "free failed!");
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156 CYG_REPORT_RETURN();
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157 } // Cyg_Mempool_Joined<T>::~Cyg_Mempool_Joined()
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158
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159
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160
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161 // -------------------------------------------------------------------------
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162 // get some memory, return NULL if none available
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163 template <class T>
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164 inline cyg_uint8 *
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165 Cyg_Mempool_Joined<T>::try_alloc( cyg_int32 size )
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166 {
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167 cyg_uint8 i;
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168 cyg_uint8 *ptr=NULL;
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169
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170 CYG_REPORT_FUNCTYPE( "returning memory at addr %08x" );
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171 CYG_REPORT_FUNCARG1DV( size );
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172
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173 for (i=0; i<poolcount; i++) {
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174 ptr = pools[i].pool->try_alloc( size );
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175 if ( NULL != ptr )
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176 break;
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177 }
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178
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179 CYG_REPORT_RETVAL( ptr );
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180
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181 CYG_MEMALLOC_FAIL_TEST(ptr==NULL, size);
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182
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183 return ptr;
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184 } // Cyg_Mempool_Joined<T>::try_alloc()
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185
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186
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187 // -------------------------------------------------------------------------
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188 // resize existing allocation, if oldsize is non-NULL, previous
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189 // allocation size is placed into it. If previous size not available,
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190 // it is set to 0. NB previous allocation size may have been rounded up.
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191 // Occasionally the allocation can be adjusted *backwards* as well as,
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192 // or instead of forwards, therefore the address of the resized
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193 // allocation is returned, or NULL if no resizing was possible.
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194 // Note that this differs from ::realloc() in that no attempt is
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195 // made to call malloc() if resizing is not possible - that is left
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196 // to higher layers. The data is copied from old to new though.
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197 // The effects of alloc_ptr==NULL or newsize==0 are undefined
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198 template <class T>
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199 inline cyg_uint8 *
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200 Cyg_Mempool_Joined<T>::resize_alloc( cyg_uint8 *alloc_ptr, cyg_int32 newsize,
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201 cyg_int32 *oldsize )
115
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202 {
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203 T *pool;
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204 cyg_uint8 * ret;
115
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205
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206 CYG_REPORT_FUNCTYPE( "success=" );
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207 CYG_REPORT_FUNCARG3( "alloc_ptr=%08x, newsize=%d, &oldsize=%08x",
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208 alloc_ptr, newsize, oldsize );
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209 CYG_CHECK_DATA_PTRC( alloc_ptr );
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210 if (NULL != oldsize )
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211 CYG_CHECK_DATA_PTRC( oldsize );
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212
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213 pool = find_pool_for_ptr( alloc_ptr );
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214 CYG_ASSERT( NULL != pool, "Couldn't find pool for pointer!" );
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215
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216 ret = pool->resize_alloc( alloc_ptr, newsize, oldsize );
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217
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218 CYG_REPORT_RETVAL( ret );
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219
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220 return ret;
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221 } // Cyg_Mempool_Joined<T>::resize_alloc()
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222
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223
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224 // -------------------------------------------------------------------------
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225 // free the memory back to the pool
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226 // returns true on success
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227 template <class T>
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228 inline cyg_bool
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229 Cyg_Mempool_Joined<T>::free( cyg_uint8 *ptr, cyg_int32 size )
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230 {
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231 T *pool;
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232 cyg_bool ret;
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233
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234 CYG_REPORT_FUNCTYPE("success=");
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235 CYG_REPORT_FUNCARG2( "ptr=%08x, size=%d", ptr, size );
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236 CYG_CHECK_DATA_PTRC( ptr );
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237
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238 pool = find_pool_for_ptr( ptr );
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239 CYG_ASSERT( NULL != pool, "Couldn't find pool for pointer!" );
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240
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241 ret = pool->free( ptr, size );
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242
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243 CYG_REPORT_RETVAL( ret );
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244 return ret;
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245 } // Cyg_Mempool_Joined<T>::free()
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246
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247
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248 // -------------------------------------------------------------------------
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249 // Get memory pool status
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250 // flags is a bitmask of requested fields to fill in. The flags are
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251 // defined in common.hxx
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252 template <class T>
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253 inline void
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254 Cyg_Mempool_Joined<T>::get_status( cyg_mempool_status_flag_t flags,
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255 Cyg_Mempool_Status &status )
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256 {
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257 cyg_uint8 i;
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258 Cyg_Mempool_Status tmpstat;
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259
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260 status.arenasize = status.freeblocks = 0;
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261 status.totalallocated = status.totalfree = 0;
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262 status.maxfree = status.origsize = 0;
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263
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264 for ( i=0; i<poolcount; i++ ) {
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265 if ( status.arenasize >= 0 ) {
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266 if ( 0 != (flags & CYG_MEMPOOL_STAT_ARENASIZE) ) {
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267 pools[i].pool->get_status( CYG_MEMPOOL_STAT_ARENASIZE,
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268 tmpstat );
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269 if ( tmpstat.arenasize > 0)
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270 status.arenasize += tmpstat.arenasize;
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271 else
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272 status.arenasize = -1;
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273 } // if
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274 } // if
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275
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276 if ( status.freeblocks >= 0 ) {
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277 if ( 0 != (flags & CYG_MEMPOOL_STAT_FREEBLOCKS) ) {
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278 pools[i].pool->get_status( CYG_MEMPOOL_STAT_FREEBLOCKS,
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279 tmpstat );
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280 if ( tmpstat.freeblocks > 0 )
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281 status.freeblocks += tmpstat.freeblocks;
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282 else
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283 status.freeblocks = -1;
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284 } // if
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285 } // if
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286
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287 if ( status.totalallocated >= 0 ) {
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288 if ( 0 != (flags & CYG_MEMPOOL_STAT_TOTALALLOCATED) ) {
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289 pools[i].pool->get_status( CYG_MEMPOOL_STAT_TOTALALLOCATED,
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290 tmpstat );
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291 if ( tmpstat.totalallocated > 0 )
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292 status.totalallocated += tmpstat.totalallocated;
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293 else
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294 status.totalallocated = -1;
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295 } // if
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296 } // if
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297
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298 if ( status.totalfree >= 0 ) {
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299 if ( 0 != (flags & CYG_MEMPOOL_STAT_TOTALFREE) ) {
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300 pools[i].pool->get_status( CYG_MEMPOOL_STAT_TOTALFREE,
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301 tmpstat );
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302 if ( tmpstat.totalfree > 0 )
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303 status.totalfree += tmpstat.totalfree;
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304 else
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305 status.totalfree = -1;
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306 } // if
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307 } // if
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308
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309 if ( status.maxfree >= 0 ) {
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310 if ( 0 != (flags & CYG_MEMPOOL_STAT_MAXFREE) ) {
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311 pools[i].pool->get_status( CYG_MEMPOOL_STAT_MAXFREE, tmpstat );
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312 if ( tmpstat.maxfree < 0 )
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313 status.maxfree = -1;
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314 else if ( tmpstat.maxfree > status.maxfree )
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315 status.maxfree = tmpstat.maxfree;
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316 } // if
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317 } // if
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318
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319 if ( status.origsize >= 0 ) {
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320 if ( 0 != (flags & CYG_MEMPOOL_STAT_ORIGSIZE) ) {
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321 pools[i].pool->get_status( CYG_MEMPOOL_STAT_ORIGSIZE, tmpstat );
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322 if ( tmpstat.origsize > 0 )
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323 status.origsize += tmpstat.origsize;
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324 else
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325 status.origsize = -1;
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326 } // if
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327 } // if
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328
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329 if ( status.maxoverhead >= 0 ) {
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330 if ( 0 != (flags & CYG_MEMPOOL_STAT_MAXOVERHEAD) ) {
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331 pools[i].pool->get_status( CYG_MEMPOOL_STAT_MAXOVERHEAD,
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332 tmpstat );
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333 if ( tmpstat.maxoverhead < 0 )
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334 status.maxoverhead = -1;
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335 else if ( tmpstat.maxoverhead > status.maxoverhead )
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336 status.maxoverhead = tmpstat.maxoverhead;
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337 } // if
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338 } // if
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339 } // for
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340 } // Cyg_Mempool_Joined<T>::get_status()
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341
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342
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343 // -------------------------------------------------------------------------
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344
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345 #endif // ifndef CYGONCE_MEMALLOC_MEMJOIN_INL
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346 // EOF memjoin.inl