Mercurial > flash_v2

annotate packages/services/memalloc/common/current/cdl/memalloc.cdl @ 1687:eb235374a7ae

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2004-06-24 Oyvind Harboe <oyvind.harboe@zylin.com> * Added cyg_memalloc_alloc_fail() fn which is invoked before return NULL from failed allocations. Useful breakpoint site. Andrew Lunn wrote some of the code and pointed out various wrinkles to be ironed out.
author asl
date Mon, 05 Jul 2004 11:07:04 +0000
parents 8d76b6216102
children
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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 #####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 ## -------------------------------------------
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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 \
1687
eb235374a7ae 2004-06-24 Oyvind Harboe <oyvind.harboe@zylin.com>
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59 sepmeta.cxx debug.c
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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
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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
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188 cdl_option CYGNUM_MEMALLOC_ALLOCATOR_DLMALLOC_ALIGNMENT {
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189 display "Minimum alignment of allocated blocks"
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190 flavor data
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191 legal_values 3 to 10
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192 default_value 3
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193 description "
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194 This option controls the minimum alignment that the
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195 allocated memory blocks are aligned on, specified as
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196 2^N. Note that using large mininum alignments can lead
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197 to excessive memory wastage."
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198 }
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199 }
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200
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201 cdl_component CYGPKG_MEMALLOC_ALLOCATOR_SEPMETA {
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202 display "Variable block allocator with separate metadata"
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203 flavor none
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204 no_define
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205 description "
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206 This component contains configuration options related to the
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207 variable block memory allocator with separate metadata."
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208
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209 cdl_option CYGSEM_MEMALLOC_ALLOCATOR_SEPMETA_THREADAWARE {
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210 display "Make thread safe"
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211 active_if CYGPKG_KERNEL
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212 default_value 1
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213 description "
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214 With this option enabled, this allocator will be
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215 made thread-safe. Additionally allocation functions
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216 are made available that allow a thread to wait
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217 until memory is available."
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218 }
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219 }
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220 }
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221
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222 cdl_option CYGFUN_MEMALLOC_KAPI {
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223 display "Kernel C API support for memory allocation"
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224 active_if CYGPKG_KERNEL
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225 default_value CYGFUN_KERNEL_API_C
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226 description "
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227 This option must be enabled to provide the extensions required
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228 to support integration into the kernel C API."
191
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229 compile kapi.cxx
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230 }
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231
138
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232 cdl_option CYGSEM_MEMALLOC_MALLOC_ZERO_RETURNS_NULL {
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233 display "malloc(0) returns NULL"
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234 default_value 0
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235 description "
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236 This option controls the behavior of malloc(0) ( or calloc with
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237 either argument 0 ). It is permitted by the standard to return
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238 either a NULL pointer or a unique pointer. Enabling this option
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239 forces a NULL pointer to be returned."
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240 }
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241
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242 cdl_option CYGSEM_MEMALLOC_INVOKE_OUT_OF_MEMORY {
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243 display "Breakpoint site when running out of memory"
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244 default_value 0
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245 description "
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246 Whenever the system runs out of memory, it invokes this function
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247 before either going to sleep waiting for memory to become
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248 available or returning failure."
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249 }
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250
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251 cdl_component CYGPKG_MEMALLOC_MALLOC_ALLOCATORS {
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252 display "malloc() and supporting allocators"
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253 flavor bool
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254 active_if CYGPKG_ISOINFRA
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255 implements CYGINT_ISO_MALLOC
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256 implements CYGINT_ISO_MALLINFO
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257 default_value 1
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258 compile malloc.cxx
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259 description "
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260 This component enables support for dynamic memory
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261 allocation as supplied by the functions malloc(),
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262 free(), calloc() and realloc(). As these
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263 functions are often used, but can have quite an
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264 overhead, disabling them here can ensure they
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265 cannot even be used accidentally when static
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266 allocation is preferred. Within this component are
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267 various allocators that can be selected for use
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268 as the underlying implementation of the dynamic
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269 allocation functions."
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270
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271 make -priority 50 {
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272 heapgeninc.tcl : <PACKAGE>/src/heapgen.cpp
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273 $(CC) $(CFLAGS) $(INCLUDE_PATH) -Wp,-MD,heapgen.tmp -E $< -o $@
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274 @sed -e '/^ *\\/d' -e "s#.*: #$@: #" heapgen.tmp > $(notdir $@).deps
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275 @rm heapgen.tmp
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276 }
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277
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278 # FIXME this should have a dependency on mlt_headers, but CDL doesn't
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279 # permit custom build rules depending on phony targets
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280 # FIXME we workaround an NT cygtclsh80 bug by cd'ing into the
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281 # correct dir and running heapgen.tcl from there rather than passing
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282 # an absolute path.
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283 make -priority 50 {
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284 heaps.cxx : heapgeninc.tcl <PACKAGE>/src/heapgen.tcl
141
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285 XPWD=`pwd` ; cd $(REPOSITORY)/$(PACKAGE)/src ; sh heapgen.tcl "$(PREFIX)" "$$XPWD"
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286 @cp heaps.hxx "$(PREFIX)"/include/pkgconf/heaps.hxx
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287 @chmod u+w "$(PREFIX)"/include/pkgconf/heaps.hxx
115
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288 }
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289
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290 make_object {
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291 heaps.o.d : heaps.cxx
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292 $(CC) $(CFLAGS) $(INCLUDE_PATH) -Wp,-MD,heaps.tmp -c -o $(OBJECT_PREFIX)_$(notdir $(@:.o.d=.o)) $<
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293 @sed -e '/^ *\\/d' -e "s#.*: #$@: #" heaps.tmp > $@
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294 @rm heaps.tmp
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295 }
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296
176
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297 cdl_component CYGBLD_MEMALLOC_MALLOC_EXTERNAL_HEAP_H {
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298 display "Use external heap definition"
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299 flavor booldata
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300 default_value 0
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301 description "This option allows other components in the
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302 system to override the default system
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303 provision of heap memory pools. This should
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304 be set to a header which provides the equivalent
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305 definitions to <pkgconf/heaps.hxx>."
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306 }
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307
115
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308 cdl_interface CYGINT_MEMALLOC_MALLOC_ALLOCATORS {
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309 display "malloc() allocator implementations"
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310 requires { CYGINT_MEMALLOC_MALLOC_ALLOCATORS == 1 }
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311 no_define
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312 }
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313
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314 cdl_option CYGBLD_MEMALLOC_MALLOC_IMPLEMENTATION_HEADER {
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315 display "malloc() implementation instantiation data"
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316 flavor data
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317 description "
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318 Memory allocator implementations that are capable of being
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319 used underneath malloc() must be instantiated. The code
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320 to do this is set in this option. It is only intended to
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321 be set by the implementation, not the user."
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322 # default corresponds to the default allocator
119
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323 default_value {"<cyg/memalloc/dlmalloc.hxx>"}
115
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324 }
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325
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326 cdl_option CYGIMP_MEMALLOC_MALLOC_VARIABLE_SIMPLE {
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327 display "Simple variable block implementation"
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328 description "This causes malloc() to use the simple
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329 variable block allocator."
119
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330 default_value 0
115
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331 implements CYGINT_MEMALLOC_MALLOC_ALLOCATORS
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332 requires { CYGBLD_MEMALLOC_MALLOC_IMPLEMENTATION_HEADER == \
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333 "<cyg/memalloc/memvar.hxx>" }
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334 requires CYGSEM_MEMALLOC_ALLOCATOR_VARIABLE_COALESCE
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335 }
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336
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337 cdl_option CYGIMP_MEMALLOC_MALLOC_DLMALLOC {
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338 display "Doug Lea's malloc implementation"
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339 description "This causes malloc() to use a version of Doug Lea's
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340 malloc (dlmalloc) as the underlying implementation."
119
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341 default_value 1
115
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342 implements CYGINT_MEMALLOC_MALLOC_ALLOCATORS
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343 requires { CYGBLD_MEMALLOC_MALLOC_IMPLEMENTATION_HEADER == \
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344 "<cyg/memalloc/dlmalloc.hxx>" }
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345 }
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346 }
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347 cdl_option CYGNUM_MEMALLOC_FALLBACK_MALLOC_POOL_SIZE {
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348 display "Size of the fallback dynamic memory pool in bytes"
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349 flavor data
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350 legal_values 32 to 0x7fffffff
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351 default_value 16384
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352 description "
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353 If *no* heaps are configured in your memory layout,
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354 dynamic memory allocation by
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355 malloc() and calloc() must be from a fixed-size,
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356 contiguous memory pool (note here that it is the
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357 pool that is of a fixed size, but malloc() is still
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358 able to allocate variable sized chunks of memory
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359 from it). This option is the size
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360 of that pool, in bytes. Note that not all of
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361 this is available for programs to
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362 use - some is needed for internal information
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363 about memory regions, and some may be lost to
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364 ensure that memory allocation only returns
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365 memory aligned on word (or double word)
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366 boundaries - a very common architecture
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367 constraint."
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368 }
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369 # ====================================================================
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370
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371 cdl_component CYGPKG_MEMALLOC_OPTIONS {
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372 display "Common memory allocator package build options"
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373 flavor none
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374 no_define
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375 description "
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376 Package specific build options including control over
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377 compiler flags used only in building this package,
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378 and details of which tests are built."
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379
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380 cdl_option CYGPKG_MEMALLOC_CFLAGS_ADD {
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381 display "Additional compiler flags"
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382 flavor data
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383 no_define
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384 default_value { "" }
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385 description "
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386 This option modifies the set of compiler flags for
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387 building this package. These flags are used in addition
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388 to the set of global flags."
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389 }
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390
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391 cdl_option CYGPKG_MEMALLOC_CFLAGS_REMOVE {
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392 display "Suppressed compiler flags"
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393 flavor data
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394 no_define
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395 default_value { "" }
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396 description "
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397 This option modifies the set of compiler flags for
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398 building this package. These flags are removed from
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399 the set of global flags if present."
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400 }
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401
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402 cdl_option CYGPKG_MEMALLOC_TESTS {
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403 display "Tests"
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404 flavor data
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405 no_define
176
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406 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" }
115
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407 description "
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408 This option specifies the set of tests for this package."
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409 }
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410 }
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411 }
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412
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413 # ====================================================================
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414 # EOF memalloc.cdl