Mercurial > flash_v2

annotate packages/services/memalloc/common/current/cdl/memalloc.cdl @ 141:450e4e1f1e80 ecos-sw-2000-11-27

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Merge from eCos master repository on 2000-11-27-23:09:27-GMT
author jlarmour
date Tue, 28 Nov 2000 00:03:34 +0000
parents 79d72068f491
children b939e9cada46
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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 # ====================================================================
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8 #####COPYRIGHTBEGIN####
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9 #
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10 # -------------------------------------------
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11 # The contents of this file are subject to the Red Hat eCos Public License
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12 # Version 1.1 (the "License"); you may not use this file except in
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13 # compliance with the License. You may obtain a copy of the License at
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14 # http://www.redhat.com/
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15 #
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16 # Software distributed under the License is distributed on an "AS IS"
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17 # basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 # License for the specific language governing rights and limitations under
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19 # the License.
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20 #
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21 # The Original Code is eCos - Embedded Configurable Operating System,
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22 # released September 30, 1998.
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23 #
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24 # The Initial Developer of the Original Code is Red Hat.
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25 # Portions created by Red Hat are
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26 # Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 # All Rights Reserved.
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28 # -------------------------------------------
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29 #
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30 #####COPYRIGHTEND####
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31 # ====================================================================
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32 ######DESCRIPTIONBEGIN####
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33 #
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34 # Author(s): jlarmour
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35 # Contributors:
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36 # Date: 2000-06-02
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37 #
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38 #####DESCRIPTIONEND####
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39 #
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40 # ====================================================================
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41
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42 cdl_package CYGPKG_MEMALLOC {
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43 display "Dynamic memory allocation"
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44 description "
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45 This package provides memory allocator infrastructure required for
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46 dynamic memory allocators, including the ISO standard malloc
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47 interface. It also contains some sample implementations."
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48 include_dir cyg/memalloc
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49 compile dlmalloc.cxx kapi.cxx malloc.cxx memfixed.cxx memvar.cxx
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50
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51 # ====================================================================
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52
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53 cdl_component CYGPKG_MEMALLOC_ALLOCATORS {
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54 display "Memory allocator implementations"
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55 flavor none
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56 no_define
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57 description "
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58 This component contains configuration options related to the
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59 various memory allocators available."
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60
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61 cdl_component CYGPKG_MEMALLOC_ALLOCATOR_FIXED {
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62 display "Fixed block allocator"
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63 flavor none
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64 no_define
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65 description "
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66 This component contains configuration options related to the
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67 fixed block memory allocator."
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68
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69 cdl_option CYGSEM_MEMALLOC_ALLOCATOR_FIXED_THREADAWARE {
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70 display "Make thread safe"
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71 active_if CYGPKG_KERNEL
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72 default_value 1
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73 description "
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74 With this option enabled, this allocator will be
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75 made thread-safe. Additionally allocation functions
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76 are made available that allow a thread to wait
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77 until memory is available."
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78 }
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79 }
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80
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81 cdl_component CYGPKG_MEMALLOC_ALLOCATOR_VARIABLE {
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82 display "Simple variable block allocator"
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83 flavor none
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84 no_define
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85 description "
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86 This component contains configuration options related to the
119
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87 simple variable block memory allocator. This allocator is not
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88 very fast, and in particular does not scale well with large
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89 numbers of allocations. It is however very compact in terms of
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90 code size and does not have very much overhead per allocation."
115
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91
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92 cdl_option CYGSEM_MEMALLOC_ALLOCATOR_VARIABLE_THREADAWARE {
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93 display "Make thread safe"
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94 active_if CYGPKG_KERNEL
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95 default_value 1
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96 description "
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97 With this option enabled, this allocator will be
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98 made thread-safe. Additionally allocation functions
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99 are added that allow a thread to wait until memory
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100 are made available that allow a thread to wait
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101 until memory is available."
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102 }
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103
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104 cdl_option CYGSEM_MEMALLOC_ALLOCATOR_VARIABLE_COALESCE {
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105 display "Coalesce memory"
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106 default_value 1
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107 description "
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108 The variable-block memory allocator can perform coalescing
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109 of memory whenever the application code releases memory back
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110 to the pool. This coalescing reduces the possibility of
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111 memory fragmentation problems, but involves extra code and
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112 processor cycles."
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113 }
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114 }
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115
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116 cdl_component CYGPKG_MEMALLOC_ALLOCATOR_DLMALLOC {
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117 display "Doug Lea's malloc"
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118 flavor none
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119 description "
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120 This component contains configuration options related to the
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121 port of Doug Lea's memory allocator, normally known as
119
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122 dlmalloc. dlmalloc has a reputation for being both fast
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123 and space-conserving, as well as resisting fragmentation well.
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124 It is a common choice for a general purpose allocator and
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125 has been used in both newlib and Linux glibc."
115
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126
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127 cdl_option CYGDBG_MEMALLOC_ALLOCATOR_DLMALLOC_DEBUG {
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128 display "Debug build"
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129 requires CYGDBG_USE_ASSERTS
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130 default_value { 0 != CYGDBG_USE_ASSERTS }
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131 description "
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132 Doug Lea's malloc implementation has substantial amounts
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133 of internal checking in order to verify the operation
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134 and consistency of the allocator. However this imposes
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135 substantial overhead on each operation. Therefore this
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136 checking may be individually disabled."
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137 }
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138
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139 cdl_option CYGIMP_MEMALLOC_ALLOCATOR_DLMALLOC_THREADAWARE {
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140 display "Make thread safe"
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141 active_if CYGPKG_KERNEL
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142 requires CYGPKG_KERNEL
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143 default_value 1
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144 description "
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145 With this option enabled, this allocator will be
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146 made thread-safe. Additionally allocation functions
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147 are made available that allow a thread to wait
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148 until memory is available."
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149 }
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150
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151 cdl_option CYGIMP_MEMALLOC_ALLOCATOR_DLMALLOC_SAFE_MULTIPLE {
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152 display "Support more than one instance"
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153 default_value 1
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154 description "
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155 Having this option disabled allows important
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156 implementation structures to be declared as a single
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157 static instance, allowing faster access. However this
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158 would fail if there is more than one instance of
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159 the dlmalloc allocator class. Therefore this option can
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160 be enabled if multiple instances are required. Note: as
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161 a special case, if this allocator is used as the
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162 implementation of malloc, and it can be determined there
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163 is more than one malloc pool, then this option will be
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164 silently enabled."
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165 }
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166
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167 cdl_option CYGIMP_MEMALLOC_ALLOCATOR_DLMALLOC_USE_MEMCPY {
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168 display "Use system memcpy() and memset()"
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169 requires CYGPKG_ISOINFRA
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170 default_value { 0 != CYGPKG_ISOINFRA }
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171 description "
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172 This may be used to control whether memset() and memcpy()
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173 are used within the implementation. The alternative is
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174 to use some macro equivalents, which some people report
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175 are faster in some circumstances."
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176 }
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177 }
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178 }
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179
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180 cdl_option CYGFUN_MEMALLOC_KAPI {
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181 display "Kernel C API support for memory allocation"
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182 active_if CYGPKG_KERNEL
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183 default_value CYGFUN_KERNEL_API_C
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184 description "
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185 This option must be enabled to provide the extensions required
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186 to support integration into the kernel C API."
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187 }
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188
138
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189 cdl_option CYGSEM_MEMALLOC_MALLOC_ZERO_RETURNS_NULL {
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190 display "malloc(0) returns NULL"
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191 default_value 0
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192 description "
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193 This option controls the behavior of malloc(0) ( or calloc with
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194 either argument 0 ). It is permitted by the standard to return
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195 either a NULL pointer or a unique pointer. Enabling this option
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196 forces a NULL pointer to be returned."
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197 }
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198
115
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199 cdl_component CYGPKG_MEMALLOC_MALLOC_ALLOCATORS {
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200 display "malloc() and supporting allocators"
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201 flavor bool
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202 active_if CYGPKG_ISOINFRA
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203 implements CYGINT_ISO_MALLOC
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204 implements CYGINT_ISO_MALLINFO
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205 default_value 1
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206 description "
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207 This component enables support for dynamic memory
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208 allocation as supplied by the functions malloc(),
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209 free(), calloc() and realloc(). As these
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210 functions are often used, but can have quite an
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211 overhead, disabling them here can ensure they
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212 cannot even be used accidentally when static
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213 allocation is preferred. Within this component are
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214 various allocators that can be selected for use
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215 as the underlying implementation of the dynamic
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216 allocation functions."
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217
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218 make -priority 50 {
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219 heapgeninc.tcl : <PACKAGE>/src/heapgen.cpp
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220 $(CC) $(CFLAGS) $(INCLUDE_PATH) -Wp,-MD,heapgen.tmp -E $< > $@
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221 @echo $@ ':' $< '\' > $(notdir $@).deps
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222 @tail +2 heapgen.tmp >> $(notdir $@).deps
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223 @echo >> $(notdir $@).deps
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224 @rm heapgen.tmp
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225 }
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226
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227 # FIXME this should have a dependency on mlt_headers, but CDL doesn't
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228 # permit custom build rules depending on phony targets
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229 # FIXME we workaround an NT cygtclsh80 bug by cd'ing into the
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230 # correct dir and running heapgen.tcl from there rather than passing
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231 # an absolute path.
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232 make -priority 50 {
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233 heaps.cxx : heapgeninc.tcl <PACKAGE>/src/heapgen.tcl
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234 XPWD=`pwd` ; cd $(REPOSITORY)/$(PACKAGE)/src ; sh heapgen.tcl "$(PREFIX)" "$$XPWD"
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235 @cp heaps.hxx "$(PREFIX)"/include/pkgconf/heaps.hxx
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236 @chmod u+w "$(PREFIX)"/include/pkgconf/heaps.hxx
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237 }
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238
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239 make_object {
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240 heaps.o.d : heaps.cxx
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241 $(CC) $(CFLAGS) $(INCLUDE_PATH) -Wp,-MD,heaps.tmp -c -o $(OBJECT_PREFIX)_$(notdir $(@:.o.d=.o)) $<
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242 @echo $@ ':' $< '\' > $@
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243 @tail +2 heaps.tmp >> $@
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244 @echo >> $@
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245 @rm heaps.tmp
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246 }
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247
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248 cdl_interface CYGINT_MEMALLOC_MALLOC_ALLOCATORS {
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249 display "malloc() allocator implementations"
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250 requires { CYGINT_MEMALLOC_MALLOC_ALLOCATORS == 1 }
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251 no_define
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252 }
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253
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254 cdl_option CYGBLD_MEMALLOC_MALLOC_IMPLEMENTATION_HEADER {
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255 display "malloc() implementation instantiation data"
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256 flavor data
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257 description "
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258 Memory allocator implementations that are capable of being
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259 used underneath malloc() must be instantiated. The code
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260 to do this is set in this option. It is only intended to
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261 be set by the implementation, not the user."
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262 # default corresponds to the default allocator
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263 default_value {"<cyg/memalloc/dlmalloc.hxx>"}
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264 }
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265
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266 cdl_option CYGIMP_MEMALLOC_MALLOC_VARIABLE_SIMPLE {
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267 display "Simple variable block implementation"
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268 description "This causes malloc() to use the simple
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269 variable block allocator."
119
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270 default_value 0
115
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271 implements CYGINT_MEMALLOC_MALLOC_ALLOCATORS
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272 requires { CYGBLD_MEMALLOC_MALLOC_IMPLEMENTATION_HEADER == \
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273 "<cyg/memalloc/memvar.hxx>" }
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274 requires CYGSEM_MEMALLOC_ALLOCATOR_VARIABLE_COALESCE
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275 }
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276
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277 cdl_option CYGIMP_MEMALLOC_MALLOC_DLMALLOC {
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278 display "Doug Lea's malloc implementation"
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279 description "This causes malloc() to use a version of Doug Lea's
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280 malloc (dlmalloc) as the underlying implementation."
119
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281 default_value 1
115
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282 implements CYGINT_MEMALLOC_MALLOC_ALLOCATORS
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283 requires { CYGBLD_MEMALLOC_MALLOC_IMPLEMENTATION_HEADER == \
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284 "<cyg/memalloc/dlmalloc.hxx>" }
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285 }
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286 }
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287 cdl_option CYGNUM_MEMALLOC_FALLBACK_MALLOC_POOL_SIZE {
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288 display "Size of the fallback dynamic memory pool in bytes"
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289 flavor data
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290 legal_values 32 to 0x7fffffff
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291 default_value 16384
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292 description "
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293 If *no* heaps are configured in your memory layout,
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294 dynamic memory allocation by
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295 malloc() and calloc() must be from a fixed-size,
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296 contiguous memory pool (note here that it is the
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297 pool that is of a fixed size, but malloc() is still
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298 able to allocate variable sized chunks of memory
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299 from it). This option is the size
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300 of that pool, in bytes. Note that not all of
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301 this is available for programs to
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302 use - some is needed for internal information
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303 about memory regions, and some may be lost to
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304 ensure that memory allocation only returns
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305 memory aligned on word (or double word)
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306 boundaries - a very common architecture
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307 constraint."
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308 }
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309 # ====================================================================
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310
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311 cdl_component CYGPKG_MEMALLOC_OPTIONS {
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312 display "Common memory allocator package build options"
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313 flavor none
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314 no_define
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315 description "
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316 Package specific build options including control over
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317 compiler flags used only in building this package,
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318 and details of which tests are built."
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319
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320 cdl_option CYGPKG_MEMALLOC_CFLAGS_ADD {
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321 display "Additional compiler flags"
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322 flavor data
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323 no_define
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324 default_value { "" }
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325 description "
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326 This option modifies the set of compiler flags for
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327 building this package. These flags are used in addition
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328 to the set of global flags."
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329 }
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330
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331 cdl_option CYGPKG_MEMALLOC_CFLAGS_REMOVE {
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332 display "Suppressed compiler flags"
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333 flavor data
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334 no_define
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335 default_value { "" }
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336 description "
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337 This option modifies the set of compiler flags for
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338 building this package. These flags are removed from
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339 the set of global flags if present."
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340 }
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341
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342 cdl_option CYGPKG_MEMALLOC_TESTS {
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343 display "Tests"
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344 flavor data
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345 no_define
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346 calculated { "tests/dlmalloc1 tests/dlmalloc2 tests/kmemfix1 tests/kmemvar1 tests/malloc1 tests/malloc2 tests/malloc3 tests/malloc4 tests/memfix1 tests/memfix2 tests/memvar1 tests/memvar2 tests/realloc" }
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347 description "
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348 This option specifies the set of tests for this package."
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349 }
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350 }
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351 }
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352
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353 # ====================================================================
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354 # EOF memalloc.cdl