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annotate packages/services/memalloc/common/current/src/memfixed.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 // memfixed.cxx
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4 //
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5 // Memory pool with fixed 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): hmt
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43 // Contributors: jlarmour
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44 // Date: 2000-06-16
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45 // Purpose: Define Memfixed class interface
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46 // Description: Inline class for constructing a fixed block allocator
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47 // Usage: #include <cyg/memalloc/memfixed.hxx>
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48 //
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49 //
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50 //####DESCRIPTIONEND####
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51 //
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52 //==========================================================================
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53
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54 // CONFIGURATION
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55
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56 #include <pkgconf/memalloc.h>
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57 #include <pkgconf/system.h>
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58 #ifdef CYGPKG_KERNEL
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59 # include <pkgconf/kernel.h>
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60 #endif
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61
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62
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63 // INCLUDES
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64
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65 #include <cyg/infra/cyg_type.h> // types
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66 #include <cyg/infra/cyg_ass.h> // assertion macros
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67 #include <cyg/infra/cyg_trac.h> // tracing macros
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68
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69 #ifdef CYGFUN_KERNEL_THREADS_TIMER
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70 # include <cyg/kernel/ktypes.h> // cyg_tick_count
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71 #endif
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72
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73 #ifdef CYGSEM_MEMALLOC_ALLOCATOR_FIXED_THREADAWARE
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74 // tell it to optimize for the fixed block one-to-one case
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75 # define CYGIMP_MEM_T_ONEFREE_TO_ONEALLOC
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76 # include <cyg/memalloc/mempolt2.hxx> // kernel safe mempool template
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77 #endif
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78
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79 #include <cyg/memalloc/memfixed.hxx>
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80 #include <cyg/memalloc/mfiximpl.hxx> // implementation of a fixed mem pool
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81 #include <cyg/memalloc/common.hxx> // Common memory allocator infra
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82
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83 // -------------------------------------------------------------------------
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84 // debugging/assert function
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85
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86 #ifdef CYGDBG_USE_ASSERTS
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87 cyg_bool
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88 Cyg_Mempool_Fixed::check_this(cyg_assert_class_zeal zeal) const
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89 {
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90 CYG_REPORT_FUNCTION();
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91 // check that we have a non-NULL pointer first
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92 if( this == NULL ) return false;
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93 #ifdef CYGSEM_MEMALLOC_ALLOCATOR_FIXED_THREADAWARE
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94 return mypool.check_this( zeal );
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95 #else
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96 return true;
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97 #endif
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98 }
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99 #endif
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100
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101 // -------------------------------------------------------------------------
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102 // Constructor: gives the base and size of the arena in which memory is
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103 // to be carved out, note that management structures are taken from the
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104 // same arena. Alloc_unit is the blocksize allocated.
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105 Cyg_Mempool_Fixed::Cyg_Mempool_Fixed(
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106 cyg_uint8 *base,
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107 cyg_int32 size,
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108 CYG_ADDRWORD alloc_unit )
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109 : mypool( base, size, alloc_unit )
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110 {
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111 }
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112
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113 // Destructor
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114 Cyg_Mempool_Fixed::~Cyg_Mempool_Fixed()
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115 {
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116 }
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117
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118 // -------------------------------------------------------------------------
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119 // get some memory; wait if none available
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120 #ifdef CYGSEM_MEMALLOC_ALLOCATOR_FIXED_THREADAWARE
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121 cyg_uint8 *
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122 Cyg_Mempool_Fixed::alloc()
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123 {
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124 return mypool.alloc( 0 );
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125 }
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126
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127 # ifdef CYGFUN_KERNEL_THREADS_TIMER
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128 // get some memory with a timeout
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129 cyg_uint8 *
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130 Cyg_Mempool_Fixed::alloc(cyg_tick_count delay_timeout )
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131 {
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132 return mypool.alloc( 0, delay_timeout );
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133 }
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134 # endif
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135 #endif
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136
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137 // get some memory, return NULL if none available
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138 cyg_uint8 *
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139 Cyg_Mempool_Fixed::try_alloc()
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140 {
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141 return mypool.try_alloc( 0 );
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142 }
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143
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144 // free the memory back to the pool
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145 cyg_bool
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146 Cyg_Mempool_Fixed::free( cyg_uint8 *p )
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147 {
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148 return mypool.free( p, 0 );
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149 }
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150
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151 // supposedly resize existing allocation. This is defined in the
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152 // fixed block allocator purely for API consistency. It will return
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153 // an error (false) for all values, except for the blocksize
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154 // returns true on success
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155 cyg_uint8 *
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156 Cyg_Mempool_Fixed::resize_alloc( cyg_uint8 *alloc_ptr, cyg_int32 newsize,
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157 cyg_int32 *oldsize )
115
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158 {
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159 return mypool.resize_alloc( alloc_ptr, newsize, oldsize );
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160 }
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161
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162 // Get memory pool status
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163 void
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164 Cyg_Mempool_Fixed::get_status( cyg_mempool_status_flag_t flags,
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165 Cyg_Mempool_Status &status )
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166 {
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167 // set to 0 - if there's anything really waiting, it will be set to
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168 // 1 later
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169 status.waiting = 0;
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170
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171 return mypool.get_status( flags, status );
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172 }
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173
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174 // -------------------------------------------------------------------------
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175
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176 // End of memfixed.cxx