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annotate packages/services/memalloc/common/current/src/memvar.cxx @ 3292:7f8e529b4d82 default tip

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Fix FREESCALE_EDMA_NBYTES_MLOFFYES_MLOFF() so it works with negative offsets.
author vae
date Wed, 29 Apr 2015 23:31:48 +0000
parents 74dbf4c3f2e1
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 //==========================================================================
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2 //
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3 // memvar.cxx
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4 //
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5 // Memory pool with variable block class declarations
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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 Free Software Foundation, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later
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16 // version.
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17 //
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18 // eCos is distributed in the hope that it will be useful, but WITHOUT
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19 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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21 // for more details.
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22 //
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23 // You should have received a copy of the GNU General Public License
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24 // along with eCos; if not, write to the Free Software Foundation, Inc.,
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25 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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26 //
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27 // As a special exception, if other files instantiate templates or use
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28 // macros or inline functions from this file, or you compile this file
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29 // and link it with other works to produce a work based on this file,
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30 // this file does not by itself cause the resulting work to be covered by
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31 // the GNU General Public License. However the source code for this file
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32 // must still be made available in accordance with section (3) of the GNU
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33 // General Public License v2.
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34 //
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35 // This exception does not invalidate any other reasons why a work based
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36 // on this file might be covered by the GNU General Public License.
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37 // -------------------------------------------
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38 // ####ECOSGPLCOPYRIGHTEND####
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39 //==========================================================================
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40 //#####DESCRIPTIONBEGIN####
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41 //
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42 // Author(s): dsm, jlarmour
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43 // Contributors:
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44 // Date: 2000-06-12
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45 // Description:
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46 // Usage: #include <cyg/memalloc/memvar.hxx>
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47 //
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48 //
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49 //####DESCRIPTIONEND####
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50 //
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51 //==========================================================================
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52
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53 // CONFIGURATION
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54
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55 #include <pkgconf/memalloc.h>
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56 #include <pkgconf/system.h>
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57 #ifdef CYGPKG_KERNEL
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58 # include <pkgconf/kernel.h>
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59 #endif
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60
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61
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62 // INCLUDES
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63
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64 #include <cyg/infra/cyg_type.h> // types
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65 #include <cyg/infra/cyg_ass.h> // assertion macros
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66 #include <cyg/infra/cyg_trac.h> // tracing macros
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67
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68 #ifdef CYGFUN_KERNEL_THREADS_TIMER
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69 # include <cyg/kernel/ktypes.h> // cyg_tick_count
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70 #endif
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71
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72 #ifdef CYGSEM_MEMALLOC_ALLOCATOR_VARIABLE_THREADAWARE
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73 # include <cyg/memalloc/mempolt2.hxx> // kernel safe mempool template
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74 #endif
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75
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76 #include <cyg/memalloc/memvar.hxx>
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77 #include <cyg/memalloc/mvarimpl.hxx> // implementation of a variable mem pool
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78 #include <cyg/memalloc/common.hxx> // Common memory allocator infra
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79
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80 // FUNCTIONS
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81
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82 // -------------------------------------------------------------------------
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83 // debugging/assert function
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84
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85 #ifdef CYGDBG_USE_ASSERTS
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86 cyg_bool
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87 Cyg_Mempool_Variable::check_this(cyg_assert_class_zeal zeal) const
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88 {
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89 CYG_REPORT_FUNCTION();
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90 // check that we have a non-NULL pointer first
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91 if( this == NULL ) return false;
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92 #ifdef CYGSEM_MEMALLOC_ALLOCATOR_VARIABLE_THREADAWARE
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93 return mypool.check_this( zeal );
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94 #else
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95 return true;
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96 #endif
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97 }
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98 #endif
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99
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100 // -------------------------------------------------------------------------
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101 // Constructor: gives the base and size of the arena in which memory is
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102 // to be carved out
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103 Cyg_Mempool_Variable::Cyg_Mempool_Variable(
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104 cyg_uint8 *base,
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105 cyg_int32 size,
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106 cyg_int32 alignment)
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107 : mypool( base, size, (CYG_ADDRWORD)alignment )
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108 {
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109 }
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110
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111 // Destructor
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112 Cyg_Mempool_Variable::~Cyg_Mempool_Variable()
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113 {
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114 }
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115
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116 // -------------------------------------------------------------------------
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117 // get some memory; wait if none available
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118 #ifdef CYGSEM_MEMALLOC_ALLOCATOR_VARIABLE_THREADAWARE
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119 cyg_uint8 *
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120 Cyg_Mempool_Variable::alloc(cyg_int32 size)
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121 {
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122 return mypool.alloc( size );
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123 }
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124
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125 # ifdef CYGFUN_KERNEL_THREADS_TIMER
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126 // get some memory with a timeout
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127 cyg_uint8 *
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128 Cyg_Mempool_Variable::alloc(cyg_int32 size, cyg_tick_count delay_timeout)
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129 {
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130 return mypool.alloc( size , delay_timeout );
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131 }
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132 # endif
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133 #endif
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134
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135 // get some memory, return NULL if none available
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136 cyg_uint8 *
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137 Cyg_Mempool_Variable::try_alloc(cyg_int32 size)
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138 {
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139 return mypool.try_alloc( size );
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140 }
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141
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142 // resize existing allocation, if oldsize is non-NULL, previous
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143 // allocation size is placed into it. If previous size not available,
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144 // it is set to 0. NB previous allocation size may have been rounded up.
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145 // Occasionally the allocation can be adjusted *backwards* as well as,
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146 // or instead of forwards, therefore the address of the resized
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147 // allocation is returned, or NULL if no resizing was possible.
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148 // Note that this differs from ::realloc() in that no attempt is
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149 // made to call malloc() if resizing is not possible - that is left
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150 // to higher layers. The data is copied from old to new though.
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151 // The effects of alloc_ptr==NULL or newsize==0 are undefined
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152 cyg_uint8 *
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153 Cyg_Mempool_Variable::resize_alloc( cyg_uint8 *alloc_ptr, cyg_int32 newsize,
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154 cyg_int32 *oldsize )
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155 {
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156 return mypool.resize_alloc( alloc_ptr, newsize, oldsize );
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157 }
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158
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159 // free the memory back to the pool
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160 cyg_bool
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161 Cyg_Mempool_Variable::free( cyg_uint8 *p, cyg_int32 size )
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162 {
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163 return mypool.free( p, size );
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164 }
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165
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166 // Get memory pool status
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167 void
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168 Cyg_Mempool_Variable::get_status( cyg_mempool_status_flag_t flags,
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169 Cyg_Mempool_Status &status )
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170 {
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171 // set to 0 - if there's anything really waiting, it will be set to
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172 // 1 later
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173 status.waiting = 0;
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174
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175 return mypool.get_status( flags, status );
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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 // End of memvar.cxx