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* Added execute permissions to files missed in conversion from CVS
author alexs
date Thu, 08 May 2003 17:42:17 +0000
parents d2c90368aeef
children
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1 #ifndef CYGONCE_MEMALLOC_DLMALLOC_HXX
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2 #define CYGONCE_MEMALLOC_DLMALLOC_HXX
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3
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4 //==========================================================================
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5 //
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6 // dlmalloc.hxx
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7 //
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8 // Interface to the port of Doug Lea's malloc implementation
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9 //
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10 //==========================================================================
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11 //####ECOSGPLCOPYRIGHTBEGIN####
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12 // -------------------------------------------
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13 // This file is part of eCos, the Embedded Configurable Operating System.
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14 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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15 //
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16 // eCos is free software; you can redistribute it and/or modify it under
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17 // the terms of the GNU General Public License as published by the Free
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18 // Software Foundation; either version 2 or (at your option) any later version.
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19 //
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20 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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21 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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22 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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23 // for more details.
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24 //
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25 // You should have received a copy of the GNU General Public License along
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26 // with eCos; if not, write to the Free Software Foundation, Inc.,
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27 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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28 //
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29 // As a special exception, if other files instantiate templates or use macros
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30 // or inline functions from this file, or you compile this file and link it
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31 // with other works to produce a work based on this file, this file does not
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32 // by itself cause the resulting work to be covered by the GNU General Public
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33 // License. However the source code for this file must still be made available
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34 // in accordance with section (3) of the GNU General Public License.
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35 //
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36 // This exception does not invalidate any other reasons why a work based on
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37 // this file might be covered by the GNU General Public License.
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38 //
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39 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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40 // at http://sources.redhat.com/ecos/ecos-license/
208
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41 // -------------------------------------------
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42 //####ECOSGPLCOPYRIGHTEND####
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43 //==========================================================================
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44 //#####DESCRIPTIONBEGIN####
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45 //
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46 // Author(s): jlarmour
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47 // Contributors:
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48 // Date: 2000-06-18
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49 // Purpose: Define standard interface to Doug Lea's malloc implementation
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50 // Description: Doug Lea's malloc has been ported to eCos. This file provides
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51 // the interface between the implementation and the standard
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52 // memory allocator interface required by eCos
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53 // Usage: #include <cyg/memalloc/dlmalloc.hxx>
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54 //
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55 //
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56 //####DESCRIPTIONEND####
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57 //
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58 //==========================================================================
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59
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60 // CONFIGURATION
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61
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62 #include <pkgconf/memalloc.h>
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63
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64 #ifdef CYGIMP_MEMALLOC_ALLOCATOR_DLMALLOC_THREADAWARE
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65 # include <pkgconf/system.h>
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66 # ifdef CYGPKG_KERNEL
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67 # include <pkgconf/kernel.h>
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68 # endif
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69 #endif
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70
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71 // when used as an implementation for malloc, we need the following
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72 // to let the system know the name of the class
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73 #define CYGCLS_MEMALLOC_MALLOC_IMPL Cyg_Mempool_dlmalloc
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74
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75 // if the implementation is all that's required, don't output anything else
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76 #ifndef __MALLOC_IMPL_WANTED
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77
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78 // INCLUDES
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79
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80 #include <stddef.h> // size_t, ptrdiff_t
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81 #include <cyg/infra/cyg_type.h> // types
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82 #ifdef CYGIMP_MEMALLOC_ALLOCATOR_DLMALLOC_THREADAWARE
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83 # include <cyg/memalloc/mempolt2.hxx> // kernel safe mempool template
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84 #endif
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85 #include <cyg/memalloc/dlmallocimpl.hxx> // dlmalloc implementation
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86 #include <cyg/memalloc/common.hxx> // Common memory allocator infra
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87 #ifdef CYGFUN_KERNEL_THREADS_TIMER
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88 # include <cyg/kernel/ktypes.h> // cyg_tick_count
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89 #endif
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90
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91
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92 // TYPE DEFINITIONS
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93
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94
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95 class Cyg_Mempool_dlmalloc
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96 {
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97 protected:
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98 #ifdef CYGIMP_MEMALLOC_ALLOCATOR_DLMALLOC_THREADAWARE
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99 Cyg_Mempolt2<Cyg_Mempool_dlmalloc_Implementation> mypool;
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100 #else
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101 Cyg_Mempool_dlmalloc_Implementation mypool;
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102 #endif
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103
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104
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105 public:
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106 // Constructor: gives the base and size of the arena in which memory is
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107 // to be carved out, note that management structures are taken from the
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108 // same arena.
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109 Cyg_Mempool_dlmalloc( cyg_uint8 *base, cyg_int32 size,
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110 CYG_ADDRWORD argthru=0 )
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111 : mypool( base, size, argthru ) {}
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112
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113 // Destructor
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114 ~Cyg_Mempool_dlmalloc() {}
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115
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116 // get some memory; wait if none available
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117 // if we aren't configured to be thread-aware this is irrelevant
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118 #ifdef CYGIMP_MEMALLOC_ALLOCATOR_DLMALLOC_THREADAWARE
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119 cyg_uint8 *
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120 alloc( cyg_int32 size ) { return mypool.alloc( size ); }
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121
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122 # ifdef CYGFUN_KERNEL_THREADS_TIMER
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123 // get some memory with a timeout
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124 cyg_uint8 *
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125 alloc( cyg_int32 size, cyg_tick_count delay_timeout ) {
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126 return mypool.alloc( size, delay_timeout );
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127 }
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128 # endif
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129 #endif
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130
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131 // get some memory, return NULL if none available
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132 cyg_uint8 *
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133 try_alloc( cyg_int32 size ) { return mypool.try_alloc( size ); }
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134
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135
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136 // resize existing allocation, if oldsize is non-NULL, previous
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137 // allocation size is placed into it. If previous size not available,
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138 // it is set to 0. NB previous allocation size may have been rounded up.
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139 // Occasionally the allocation can be adjusted *backwards* as well as,
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140 // or instead of forwards, therefore the address of the resized
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141 // allocation is returned, or NULL if no resizing was possible.
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142 // Note that this differs from ::realloc() in that no attempt is
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143 // made to call malloc() if resizing is not possible - that is left
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144 // to higher layers. The data is copied from old to new though.
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145 // The effects of alloc_ptr==NULL or newsize==0 are undefined
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146 cyg_uint8 *
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147 resize_alloc( cyg_uint8 *alloc_ptr, cyg_int32 newsize,
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148 cyg_int32 *oldsize ) {
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149 return mypool.resize_alloc( alloc_ptr, newsize, oldsize);
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150 }
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151
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152 // free the memory back to the pool
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153 // returns true on success
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154 cyg_bool
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155 free( cyg_uint8 *ptr, cyg_int32 size=0 ) { return mypool.free(ptr, size); }
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156
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157 // Get memory pool status
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158 // flags is a bitmask of requested fields to fill in. The flags are
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159 // defined in common.hxx
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160 void
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161 get_status( cyg_mempool_status_flag_t flags, Cyg_Mempool_Status &status ) {
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162 // set to 0 - if there's anything really waiting, it will be set to
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163 // 1 later
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164 status.waiting = 0;
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165 mypool.get_status( flags, status );
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166 }
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167 };
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168
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169 #endif // ifndef __MALLOC_IMPL_WANTED
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170
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171 #endif // ifndef CYGONCE_MEMALLOC_DLMALLOC_HXX
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172 // EOF dlmalloc.hxx