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annotate packages/services/memalloc/common/current/src/malloc.cxx @ 3105:087a81b7ea16

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Fix compiler warnings about variables that are set but never referenced. [ Bugzilla 1001511 ]
author grante
date Tue, 06 Mar 2012 19:37:40 +0000
parents 22da989aafa4
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 //========================================================================
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2 //
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3 // malloc.cxx
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4 //
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5 // Implementation of ISO C memory allocation routines
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6 //
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7 //========================================================================
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8 // ####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004, 2009 Free Software Foundation, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later
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16 // version.
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17 //
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18 // eCos is distributed in the hope that it will be useful, but WITHOUT
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19 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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21 // for more details.
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22 //
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23 // You should have received a copy of the GNU General Public License
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24 // along with eCos; if not, write to the Free Software Foundation, Inc.,
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25 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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26 //
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27 // As a special exception, if other files instantiate templates or use
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28 // macros or inline functions from this file, or you compile this file
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29 // and link it with other works to produce a work based on this file,
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30 // this file does not by itself cause the resulting work to be covered by
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31 // the GNU General Public License. However the source code for this file
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32 // must still be made available in accordance with section (3) of the GNU
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33 // General Public License v2.
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34 //
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35 // This exception does not invalidate any other reasons why a work based
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36 // on this file might be covered by the GNU General Public License.
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37 // -------------------------------------------
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38 // ####ECOSGPLCOPYRIGHTEND####
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39 //========================================================================
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40 //#####DESCRIPTIONBEGIN####
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41 //
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42 // Author(s): jlarmour
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43 // Contributors:
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44 // Date: 2000-04-30
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45 // Purpose: Provides ISO C calloc(), malloc(), realloc() and free()
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46 // functions
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47 // Description: Implementation of ISO standard allocation routines as per
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48 // ISO C section 7.10.3
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49 // Usage:
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50 //
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51 //####DESCRIPTIONEND####
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52 //
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53 //========================================================================
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54
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55 // CONFIGURATION
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56
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57 #include <pkgconf/memalloc.h> // Configuration header
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58
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59 // Do we want these functions?
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60 #ifdef CYGPKG_MEMALLOC_MALLOC_ALLOCATORS
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61
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62 // INCLUDES
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63
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64 #include <cyg/infra/cyg_type.h> // Common type definitions and support
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65 #include <cyg/infra/cyg_trac.h> // Common tracing support
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66 #include <cyg/infra/cyg_ass.h> // Common assertion support
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67 #include <string.h> // For memset() and memmove()
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68 #include <stdlib.h> // header for this file
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69 #ifdef CYGBLD_MEMALLOC_MALLOC_EXTERNAL_HEAP_H
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70 # include CYGBLD_MEMALLOC_MALLOC_EXTERNAL_HEAP_H
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71 #else
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72 # include <pkgconf/heaps.hxx> // heap pools information
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73 #endif
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74 #include CYGBLD_MEMALLOC_MALLOC_IMPLEMENTATION_HEADER
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75
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76 // STATIC VARIABLES
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77
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78 // First deal with the worst case, that the memory layout didn't define a
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79 // heap
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80 #if CYGMEM_HEAP_COUNT == 0
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81
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82 // the data space for the memory pool
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83 cyg_uint8 cyg_memalloc_mallocpool_memory[
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84 CYGNUM_MEMALLOC_FALLBACK_MALLOC_POOL_SIZE ] CYGBLD_ATTRIB_WEAK;
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85
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86 // the memory pool object itself
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87 CYGCLS_MEMALLOC_MALLOC_IMPL cyg_memalloc_mallocpool
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88 CYGBLD_ATTRIB_INIT_PRI( CYG_INIT_MEMALLOC ) =
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89 CYGCLS_MEMALLOC_MALLOC_IMPL( cyg_memalloc_mallocpool_memory,
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90 sizeof( cyg_memalloc_mallocpool_memory ) );
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91
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92 # define POOL cyg_memalloc_mallocpool
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93
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94 #elif CYGMEM_HEAP_COUNT == 1
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95 // one heap, so it's straightforward
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96
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97 # define POOL (*cygmem_memalloc_heaps[0])
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98
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99 #else
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100 // multiple heaps
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101 #ifdef CYGBLD_MEMALLOC_MALLOC_EXTERNAL_JOIN_H
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102 # include CYGBLD_MEMALLOC_MALLOC_EXTERNAL_JOIN_H
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103 #else
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104 # include <cyg/memalloc/memjoin.hxx>
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105 #endif
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106
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107 Cyg_Mempool_Joined<CYGCLS_MEMALLOC_MALLOC_IMPL> cyg_memalloc_mallocpool
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108 CYGBLD_ATTRIB_INIT_PRI( CYG_INIT_MEMALLOC ) =
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109 Cyg_Mempool_Joined<CYGCLS_MEMALLOC_MALLOC_IMPL>(
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110 CYGMEM_HEAP_COUNT, cygmem_memalloc_heaps
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111 );
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112
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113 # define POOL cyg_memalloc_mallocpool
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114
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115 #endif
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116
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117 // FUNCTIONS
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118
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119 void *
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120 malloc( size_t size )
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121 {
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122 void *data_ptr;
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123
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124 CYG_REPORT_FUNCNAMETYPE( "malloc", "returning pointer %08x" );
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125
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126 CYG_REPORT_FUNCARG1DV( size );
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127
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128 #ifdef CYGSEM_MEMALLOC_MALLOC_ZERO_RETURNS_NULL
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129 // first check if size wanted is 0
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130 if ( 0 == size ) {
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131 CYG_REPORT_RETVAL( NULL );
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132 return NULL;
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133 } // if
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134 #endif
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135
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136 // ask the pool for the data
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137 data_ptr = POOL.try_alloc( size );
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138
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139 // if it isn't NULL is the pointer valid?
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140 if ( NULL != data_ptr ) {
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141 CYG_CHECK_DATA_PTR( data_ptr,
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142 "allocator returned invalid pointer!" );
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143
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144 // And just check its alignment
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145 CYG_ASSERT( !((CYG_ADDRWORD)data_ptr & (sizeof(CYG_ADDRWORD) - 1)),
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146 "Allocator has returned badly aligned data!");
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147 } // if
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148
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149 CYG_REPORT_RETVAL( data_ptr );
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150
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151 return data_ptr;
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152 } // malloc()
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153
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154
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155 void
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156 free( void *ptr )
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157 {
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158 cyg_bool freeret CYGBLD_ATTRIB_UNUSED;
115
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159
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160 CYG_REPORT_FUNCNAME( "free");
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161
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162 CYG_REPORT_FUNCARG1XV( ptr );
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163
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164 // if null pointer, do nothing as per spec
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165 if ( NULL==ptr )
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166 return;
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167
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168 CYG_CHECK_DATA_PTR( ptr, "Pointer to free isn't even valid!" );
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169
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170 // get pool to free it
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171 freeret = POOL.free( (cyg_uint8 *) ptr );
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172
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173 CYG_ASSERT( freeret , "Couldn't free!" );
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174
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175 CYG_REPORT_RETURN();
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176
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177 } // free()
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178
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179
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180 void *
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181 calloc( size_t nmemb, size_t size )
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182 {
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183 void *data_ptr;
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184 cyg_ucount32 realsize;
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185
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186 CYG_REPORT_FUNCNAMETYPE( "calloc", "returning pointer %08x" );
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187
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188 CYG_REPORT_FUNCARG2DV( nmemb, size );
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189
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190 realsize = nmemb * size;
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191
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192 data_ptr = malloc( realsize );
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193
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194 // Fill with 0's if non-NULL
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195 if ( data_ptr != NULL )
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196 memset( data_ptr, 0, realsize );
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197
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198 CYG_REPORT_RETVAL( data_ptr );
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199 return data_ptr;
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200 } // calloc()
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201
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202
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203 externC void *
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204 realloc( void *ptr, size_t size )
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205 {
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206 cyg_int32 oldsize;
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207
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208 CYG_REPORT_FUNCNAMETYPE( "realloc", "returning pointer %08x" );
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209
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210 CYG_REPORT_FUNCARG2( "ptr=%08x, size=%d", ptr, size );
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211
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212 // if pointer is NULL, we must malloc it
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213 if ( ptr == NULL ) {
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214 ptr = malloc( size );
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215 CYG_REPORT_RETVAL( ptr );
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216 return ptr;
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217 } // if
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218
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219 CYG_CHECK_DATA_PTR( ptr, "realloc() passed a bogus pointer!" );
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220
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221 // if size is 0, we must free it
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222 if (size == 0) {
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223 free(ptr);
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224 CYG_REPORT_RETVAL( NULL );
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225 return NULL;
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226 } // if
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227
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228 void *newptr;
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229
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230 // otherwise try to resize allocation
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231 newptr = POOL.resize_alloc( (cyg_uint8 *)ptr, size, &oldsize );
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232
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233 if ( NULL == newptr ) {
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234 // if resize_alloc doesn't return a pointer, it failed, so we
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235 // just have to allocate new space instead, and later copy it
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236
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237 CYG_ASSERT( oldsize != 0,
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238 "resize_alloc() couldn't determine allocation size!" );
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239
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240 newptr = malloc( size );
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241
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242 if ( NULL != newptr ) {
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243 memcpy( newptr, ptr, size < (size_t) oldsize ? size
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244 : (size_t) oldsize );
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245 free( ptr );
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246 }
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247 }
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248
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249 CYG_REPORT_RETVAL( newptr );
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250 return newptr;
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251 } // realloc()
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252
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253
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254 externC struct mallinfo
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255 mallinfo( void )
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256 {
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257 struct mallinfo ret = { 0 }; // initialize to all zeros
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258 Cyg_Mempool_Status stat;
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259
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260 CYG_REPORT_FUNCTION();
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261
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262 POOL.get_status( CYG_MEMPOOL_STAT_ARENASIZE|
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263 CYG_MEMPOOL_STAT_FREEBLOCKS|
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264 CYG_MEMPOOL_STAT_TOTALALLOCATED|
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265 CYG_MEMPOOL_STAT_TOTALFREE|
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266 CYG_MEMPOOL_STAT_MAXFREE, stat );
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267
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268 if ( stat.arenasize > 0 )
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269 ret.arena = stat.arenasize;
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270
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271 if ( stat.freeblocks > 0 )
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272 ret.ordblks = stat.freeblocks;
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273
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274 if ( stat.totalallocated > 0 )
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275 ret.uordblks = stat.totalallocated;
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276
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277 if ( stat.totalfree > 0 )
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278 ret.fordblks = stat.totalfree;
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279
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280 if ( stat.maxfree > 0 )
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281 ret.maxfree = stat.maxfree;
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282
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283 CYG_REPORT_RETURN();
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284 return ret;
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285 } // mallinfo()
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286
2887
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287
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288 inline void *
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289 operator new(size_t size, CYGCLS_MEMALLOC_MALLOC_IMPL *ptr)
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290 { return (void *)ptr; };
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291
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292 externC cyg_bool
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293 cyg_memalloc_heap_reinit( cyg_uint8 *base, cyg_uint32 size )
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294 {
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295 #if CYGMEM_HEAP_COUNT == 0
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296 CYGCLS_MEMALLOC_MALLOC_IMPL *m = new(&cyg_memalloc_mallocpool)
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297 CYGCLS_MEMALLOC_MALLOC_IMPL( base, size );
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298 return true;
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299 #elif CYGMEM_HEAP_COUNT == 1
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300 cygmem_memalloc_heaps[0] = new(cygmem_memalloc_heaps[0])
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301 CYGCLS_MEMALLOC_MALLOC_IMPL( base, size );
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302 return true;
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303 #else
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304 return false;
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305 #endif
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306 }
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307
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308 #endif // ifdef CYGPKG_MEMALLOC_MALLOC_ALLOCATORS
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309
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310 // EOF malloc.cxx