Mercurial > flash_v2

annotate packages/services/memalloc/common/current/cdl/memalloc.cdl @ 210:d2c90368aeef

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Merge from eCos master repository on 2002-05-23-21:39:14-BST
author jlarmour
date Thu, 23 May 2002 22:59:51 +0000
parents e0c0827131d1
children 8d76b6216102
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1 # ====================================================================
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2 #
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3 # memalloc.cdl
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4 #
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5 # Dynamic memory allocator services configuration data
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6 #
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7 # ====================================================================
208
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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 Red Hat, 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 version.
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16 ##
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17 ## eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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18 ## WARRANTY; without even the implied warranty of MERCHANTABILITY or
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19 ## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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20 ## for more details.
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21 ##
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22 ## You should have received a copy of the GNU General Public License along
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23 ## with eCos; if not, write to the Free Software Foundation, Inc.,
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24 ## 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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25 ##
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26 ## As a special exception, if other files instantiate templates or use macros
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27 ## or inline functions from this file, or you compile this file and link it
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28 ## with other works to produce a work based on this file, this file does not
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29 ## by itself cause the resulting work to be covered by the GNU General Public
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30 ## License. However the source code for this file must still be made available
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31 ## in accordance with section (3) of the GNU General Public License.
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32 ##
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33 ## This exception does not invalidate any other reasons why a work based on
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34 ## this file might be covered by the GNU General Public License.
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35 ##
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36 ## Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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37 ## at http://sources.redhat.com/ecos/ecos-license/
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38 ## -------------------------------------------
208
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39 #####ECOSGPLCOPYRIGHTEND####
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40 # ====================================================================
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41 ######DESCRIPTIONBEGIN####
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42 #
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43 # Author(s): jlarmour
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44 # Contributors:
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45 # Date: 2000-06-02
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46 #
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47 #####DESCRIPTIONEND####
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48 #
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49 # ====================================================================
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50
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51 cdl_package CYGPKG_MEMALLOC {
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52 display "Dynamic memory allocation"
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53 description "
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54 This package provides memory allocator infrastructure required for
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55 dynamic memory allocators, including the ISO standard malloc
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56 interface. It also contains some sample implementations."
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57 include_dir cyg/memalloc
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58 compile dlmalloc.cxx memfixed.cxx memvar.cxx \
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59 sepmeta.cxx
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60
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61 # ====================================================================
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62
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63 cdl_component CYGPKG_MEMALLOC_ALLOCATORS {
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64 display "Memory allocator implementations"
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65 flavor none
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66 no_define
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67 description "
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68 This component contains configuration options related to the
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69 various memory allocators available."
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70
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71 cdl_component CYGPKG_MEMALLOC_ALLOCATOR_FIXED {
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72 display "Fixed block allocator"
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73 flavor none
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74 no_define
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75 description "
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76 This component contains configuration options related to the
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77 fixed block memory allocator."
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78
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79 cdl_option CYGSEM_MEMALLOC_ALLOCATOR_FIXED_THREADAWARE {
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80 display "Make thread safe"
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81 active_if CYGPKG_KERNEL
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82 default_value 1
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83 description "
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84 With this option enabled, this allocator will be
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85 made thread-safe. Additionally allocation functions
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86 are made available that allow a thread to wait
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87 until memory is available."
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88 }
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89 }
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90
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91 cdl_component CYGPKG_MEMALLOC_ALLOCATOR_VARIABLE {
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92 display "Simple variable block allocator"
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93 flavor none
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94 no_define
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95 description "
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96 This component contains configuration options related to the
119
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97 simple variable block memory allocator. This allocator is not
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98 very fast, and in particular does not scale well with large
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99 numbers of allocations. It is however very compact in terms of
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100 code size and does not have very much overhead per allocation."
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101
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102 cdl_option CYGSEM_MEMALLOC_ALLOCATOR_VARIABLE_THREADAWARE {
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103 display "Make thread safe"
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104 active_if CYGPKG_KERNEL
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105 default_value 1
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106 description "
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107 With this option enabled, this allocator will be
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108 made thread-safe. Additionally allocation functions
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109 are added that allow a thread to wait until memory
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110 are made available that allow a thread to wait
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111 until memory is available."
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112 }
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113
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114 cdl_option CYGSEM_MEMALLOC_ALLOCATOR_VARIABLE_COALESCE {
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115 display "Coalesce memory"
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116 default_value 1
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117 description "
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118 The variable-block memory allocator can perform coalescing
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119 of memory whenever the application code releases memory back
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120 to the pool. This coalescing reduces the possibility of
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121 memory fragmentation problems, but involves extra code and
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122 processor cycles."
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123 }
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124 }
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125
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126 cdl_component CYGPKG_MEMALLOC_ALLOCATOR_DLMALLOC {
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127 display "Doug Lea's malloc"
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128 flavor none
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129 description "
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130 This component contains configuration options related to the
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131 port of Doug Lea's memory allocator, normally known as
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132 dlmalloc. dlmalloc has a reputation for being both fast
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133 and space-conserving, as well as resisting fragmentation well.
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134 It is a common choice for a general purpose allocator and
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135 has been used in both newlib and Linux glibc."
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136
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137 cdl_option CYGDBG_MEMALLOC_ALLOCATOR_DLMALLOC_DEBUG {
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138 display "Debug build"
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139 requires CYGDBG_USE_ASSERTS
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140 default_value { 0 != CYGDBG_USE_ASSERTS }
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141 description "
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142 Doug Lea's malloc implementation has substantial amounts
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143 of internal checking in order to verify the operation
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144 and consistency of the allocator. However this imposes
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145 substantial overhead on each operation. Therefore this
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146 checking may be individually disabled."
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147 }
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148
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149 cdl_option CYGIMP_MEMALLOC_ALLOCATOR_DLMALLOC_THREADAWARE {
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150 display "Make thread safe"
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151 active_if CYGPKG_KERNEL
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152 requires CYGPKG_KERNEL
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153 default_value 1
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154 description "
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155 With this option enabled, this allocator will be
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156 made thread-safe. Additionally allocation functions
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157 are made available that allow a thread to wait
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158 until memory is available."
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159 }
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160
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161 cdl_option CYGIMP_MEMALLOC_ALLOCATOR_DLMALLOC_SAFE_MULTIPLE {
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162 display "Support more than one instance"
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163 default_value 1
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164 description "
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165 Having this option disabled allows important
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166 implementation structures to be declared as a single
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167 static instance, allowing faster access. However this
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168 would fail if there is more than one instance of
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169 the dlmalloc allocator class. Therefore this option can
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170 be enabled if multiple instances are required. Note: as
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171 a special case, if this allocator is used as the
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172 implementation of malloc, and it can be determined there
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173 is more than one malloc pool, then this option will be
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174 silently enabled."
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175 }
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176
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177 cdl_option CYGIMP_MEMALLOC_ALLOCATOR_DLMALLOC_USE_MEMCPY {
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178 display "Use system memcpy() and memset()"
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179 requires CYGPKG_ISOINFRA
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180 default_value { 0 != CYGPKG_ISOINFRA }
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181 description "
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182 This may be used to control whether memset() and memcpy()
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183 are used within the implementation. The alternative is
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184 to use some macro equivalents, which some people report
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185 are faster in some circumstances."
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186 }
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187 }
176
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188
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189 cdl_component CYGPKG_MEMALLOC_ALLOCATOR_SEPMETA {
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190 display "Variable block allocator with separate metadata"
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191 flavor none
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192 no_define
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193 description "
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194 This component contains configuration options related to the
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195 variable block memory allocator with separate metadata."
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196
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197 cdl_option CYGSEM_MEMALLOC_ALLOCATOR_SEPMETA_THREADAWARE {
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198 display "Make thread safe"
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199 active_if CYGPKG_KERNEL
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200 default_value 1
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201 description "
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202 With this option enabled, this allocator will be
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203 made thread-safe. Additionally allocation functions
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204 are made available that allow a thread to wait
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205 until memory is available."
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206 }
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207 }
115
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208 }
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209
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210 cdl_option CYGFUN_MEMALLOC_KAPI {
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211 display "Kernel C API support for memory allocation"
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212 active_if CYGPKG_KERNEL
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213 default_value CYGFUN_KERNEL_API_C
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214 description "
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215 This option must be enabled to provide the extensions required
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216 to support integration into the kernel C API."
191
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217 compile kapi.cxx
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218 }
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219
138
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220 cdl_option CYGSEM_MEMALLOC_MALLOC_ZERO_RETURNS_NULL {
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221 display "malloc(0) returns NULL"
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222 default_value 0
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223 description "
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224 This option controls the behavior of malloc(0) ( or calloc with
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225 either argument 0 ). It is permitted by the standard to return
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226 either a NULL pointer or a unique pointer. Enabling this option
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227 forces a NULL pointer to be returned."
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228 }
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229
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230 cdl_component CYGPKG_MEMALLOC_MALLOC_ALLOCATORS {
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231 display "malloc() and supporting allocators"
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232 flavor bool
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233 active_if CYGPKG_ISOINFRA
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234 implements CYGINT_ISO_MALLOC
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235 implements CYGINT_ISO_MALLINFO
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236 default_value 1
191
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237 compile malloc.cxx
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238 description "
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239 This component enables support for dynamic memory
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240 allocation as supplied by the functions malloc(),
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241 free(), calloc() and realloc(). As these
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242 functions are often used, but can have quite an
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243 overhead, disabling them here can ensure they
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244 cannot even be used accidentally when static
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245 allocation is preferred. Within this component are
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246 various allocators that can be selected for use
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247 as the underlying implementation of the dynamic
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248 allocation functions."
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249
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250 make -priority 50 {
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251 heapgeninc.tcl : <PACKAGE>/src/heapgen.cpp
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252 $(CC) $(CFLAGS) $(INCLUDE_PATH) -Wp,-MD,heapgen.tmp -E $< -o $@
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253 @sed -e '/^ *\\/d' -e "s#.*: #$@: #" heapgen.tmp > $(notdir $@).deps
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254 @rm heapgen.tmp
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255 }
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256
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257 # FIXME this should have a dependency on mlt_headers, but CDL doesn't
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258 # permit custom build rules depending on phony targets
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259 # FIXME we workaround an NT cygtclsh80 bug by cd'ing into the
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260 # correct dir and running heapgen.tcl from there rather than passing
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261 # an absolute path.
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262 make -priority 50 {
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263 heaps.cxx : heapgeninc.tcl <PACKAGE>/src/heapgen.tcl
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264 XPWD=`pwd` ; cd $(REPOSITORY)/$(PACKAGE)/src ; sh heapgen.tcl "$(PREFIX)" "$$XPWD"
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265 @cp heaps.hxx "$(PREFIX)"/include/pkgconf/heaps.hxx
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266 @chmod u+w "$(PREFIX)"/include/pkgconf/heaps.hxx
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267 }
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268
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269 make_object {
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270 heaps.o.d : heaps.cxx
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271 $(CC) $(CFLAGS) $(INCLUDE_PATH) -Wp,-MD,heaps.tmp -c -o $(OBJECT_PREFIX)_$(notdir $(@:.o.d=.o)) $<
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272 @sed -e '/^ *\\/d' -e "s#.*: #$@: #" heaps.tmp > $@
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273 @rm heaps.tmp
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274 }
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275
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276 cdl_component CYGBLD_MEMALLOC_MALLOC_EXTERNAL_HEAP_H {
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277 display "Use external heap definition"
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278 flavor booldata
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279 default_value 0
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280 description "This option allows other components in the
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281 system to override the default system
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282 provision of heap memory pools. This should
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283 be set to a header which provides the equivalent
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284 definitions to <pkgconf/heaps.hxx>."
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285 }
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286
115
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287 cdl_interface CYGINT_MEMALLOC_MALLOC_ALLOCATORS {
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288 display "malloc() allocator implementations"
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289 requires { CYGINT_MEMALLOC_MALLOC_ALLOCATORS == 1 }
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290 no_define
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291 }
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292
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293 cdl_option CYGBLD_MEMALLOC_MALLOC_IMPLEMENTATION_HEADER {
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294 display "malloc() implementation instantiation data"
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295 flavor data
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296 description "
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297 Memory allocator implementations that are capable of being
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298 used underneath malloc() must be instantiated. The code
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299 to do this is set in this option. It is only intended to
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300 be set by the implementation, not the user."
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301 # default corresponds to the default allocator
119
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302 default_value {"<cyg/memalloc/dlmalloc.hxx>"}
115
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303 }
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304
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305 cdl_option CYGIMP_MEMALLOC_MALLOC_VARIABLE_SIMPLE {
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306 display "Simple variable block implementation"
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307 description "This causes malloc() to use the simple
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308 variable block allocator."
119
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309 default_value 0
115
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310 implements CYGINT_MEMALLOC_MALLOC_ALLOCATORS
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311 requires { CYGBLD_MEMALLOC_MALLOC_IMPLEMENTATION_HEADER == \
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312 "<cyg/memalloc/memvar.hxx>" }
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313 requires CYGSEM_MEMALLOC_ALLOCATOR_VARIABLE_COALESCE
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314 }
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315
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316 cdl_option CYGIMP_MEMALLOC_MALLOC_DLMALLOC {
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317 display "Doug Lea's malloc implementation"
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318 description "This causes malloc() to use a version of Doug Lea's
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319 malloc (dlmalloc) as the underlying implementation."
119
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320 default_value 1
115
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321 implements CYGINT_MEMALLOC_MALLOC_ALLOCATORS
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322 requires { CYGBLD_MEMALLOC_MALLOC_IMPLEMENTATION_HEADER == \
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323 "<cyg/memalloc/dlmalloc.hxx>" }
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324 }
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325 }
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326 cdl_option CYGNUM_MEMALLOC_FALLBACK_MALLOC_POOL_SIZE {
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327 display "Size of the fallback dynamic memory pool in bytes"
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328 flavor data
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329 legal_values 32 to 0x7fffffff
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330 default_value 16384
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331 description "
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332 If *no* heaps are configured in your memory layout,
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333 dynamic memory allocation by
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334 malloc() and calloc() must be from a fixed-size,
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335 contiguous memory pool (note here that it is the
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336 pool that is of a fixed size, but malloc() is still
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337 able to allocate variable sized chunks of memory
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338 from it). This option is the size
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339 of that pool, in bytes. Note that not all of
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340 this is available for programs to
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341 use - some is needed for internal information
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342 about memory regions, and some may be lost to
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343 ensure that memory allocation only returns
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344 memory aligned on word (or double word)
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345 boundaries - a very common architecture
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346 constraint."
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347 }
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348 # ====================================================================
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349
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350 cdl_component CYGPKG_MEMALLOC_OPTIONS {
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351 display "Common memory allocator package build options"
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352 flavor none
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353 no_define
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354 description "
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355 Package specific build options including control over
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356 compiler flags used only in building this package,
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357 and details of which tests are built."
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358
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359 cdl_option CYGPKG_MEMALLOC_CFLAGS_ADD {
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360 display "Additional compiler flags"
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361 flavor data
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362 no_define
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363 default_value { "" }
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364 description "
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365 This option modifies the set of compiler flags for
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366 building this package. These flags are used in addition
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367 to the set of global flags."
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368 }
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369
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370 cdl_option CYGPKG_MEMALLOC_CFLAGS_REMOVE {
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371 display "Suppressed compiler flags"
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372 flavor data
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373 no_define
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374 default_value { "" }
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375 description "
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376 This option modifies the set of compiler flags for
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377 building this package. These flags are removed from
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378 the set of global flags if present."
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379 }
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380
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381 cdl_option CYGPKG_MEMALLOC_TESTS {
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382 display "Tests"
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383 flavor data
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384 no_define
176
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385 calculated { "tests/dlmalloc1 tests/dlmalloc2 tests/heaptest tests/kmemfix1 tests/kmemvar1 tests/malloc1 tests/malloc2 tests/malloc3 tests/malloc4 tests/memfix1 tests/memfix2 tests/memvar1 tests/memvar2 tests/realloc tests/sepmeta1 tests/sepmeta2" }
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386 description "
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387 This option specifies the set of tests for this package."
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388 }
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389 }
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390 }
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391
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392 # ====================================================================
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393 # EOF memalloc.cdl