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annotate packages/services/memalloc/common/current/src/kapi.cxx @ 208:e0c0827131d1 ecos

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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
parents 6ed91473a1cd
children d2c90368aeef
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1 //==========================================================================
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2 //
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3 // kapi.cxx
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4 //
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5 // Implementation of kernel C API functions for memory pools
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6 //
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7 //==========================================================================
208
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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####
115
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40 //==========================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s): nickg, dsm, jlarmour
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44 // Contributors:
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45 // Date: 2000-06-12
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46 // Description: Implementation of kernel C API functions for memory pools
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47 // Usage:
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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 #ifdef CYGFUN_MEMALLOC_KAPI
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63
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64 // INCLUDES
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65
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66 #include <cyg/infra/cyg_type.h> // types
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67 #include <cyg/infra/cyg_ass.h> // assertion macros
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68 #include <cyg/infra/cyg_trac.h> // tracing macros
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69 #include <cyg/kernel/ktypes.h> // base kernel types
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70
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71 #include <cyg/memalloc/memvar.hxx>
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72 #include <cyg/memalloc/memfixed.hxx>
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73 #include <cyg/memalloc/common.hxx> // status flags
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74
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75 #include <cyg/kernel/kapi.h> // C API
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76
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77 // MACROS
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78
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79 #ifdef CYGDBG_USE_ASSERTS
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80
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81 #define CYG_ASSERT_SIZES(cstruct, cxxstruct) \
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82 CYG_MACRO_START \
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83 char *msg = "Size of C struct " #cstruct \
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84 " != size of C++ struct " #cxxstruct ; \
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85 CYG_ASSERT( sizeof(cstruct) == sizeof(cxxstruct) , msg ); \
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86 CYG_MACRO_END
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87
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88 #else
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89
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90 #define CYG_ASSERT_SIZES(cstruct, cxxstruct)
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91
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92 #endif
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93
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94 // FUNCTIONS
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95
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96 // -------------------------------------------------------------------------
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97 // Magic new function
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98
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99 inline void *operator new(size_t size, void *ptr)
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100 {
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101 CYG_CHECK_DATA_PTR( ptr, "Bad pointer" );
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102 return ptr;
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103 }
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104
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105 /*-----------------------------------------------------------------------*/
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106 /* Memory pools */
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107
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108 /* Create a variable size memory pool */
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109 externC void cyg_mempool_var_create(
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110 void *base, /* base of memory to use for pool */
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111 cyg_int32 size, /* size of memory in bytes */
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112 cyg_handle_t *handle, /* returned handle of memory pool */
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113 cyg_mempool_var *var /* space to put pool structure in */
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114 )
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115 {
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116 CYG_ASSERT_SIZES( cyg_mempool_var, Cyg_Mempool_Variable );
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117
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118 Cyg_Mempool_Variable *t = new((void *)var) Cyg_Mempool_Variable (
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119 (cyg_uint8 *)base,
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120 size
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121 );
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122 t=t;
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123
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124 CYG_CHECK_DATA_PTR( handle, "Bad handle pointer" );
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125 *handle = (cyg_handle_t)var;
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126 }
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127
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128 /* Delete variable size memory pool */
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129 externC void cyg_mempool_var_delete(cyg_handle_t varpool)
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130 {
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131 ((Cyg_Mempool_Variable *)varpool)->~Cyg_Mempool_Variable();
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132 }
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133
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134 /* Allocates a block of length size. This waits if the memory is not
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135 currently available. */
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136 #ifdef CYGSEM_MEMALLOC_ALLOCATOR_VARIABLE_THREADAWARE
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137 externC void *cyg_mempool_var_alloc(cyg_handle_t varpool, cyg_int32 size)
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138 {
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139 return ((Cyg_Mempool_Variable *)varpool)->alloc(size);
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140 }
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141
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142 # ifdef CYGFUN_KERNEL_THREADS_TIMER
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143
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144 /* Allocates a block of length size. This waits for up to delay
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145 ticks, if the memory is not already available. NULL is returned if
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146 no memory is available. */
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147 externC void *cyg_mempool_var_timed_alloc(
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148 cyg_handle_t varpool,
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149 cyg_int32 size,
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150 cyg_tick_count_t abstime)
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151 {
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152 return ((Cyg_Mempool_Variable *)varpool)->alloc(size, abstime);
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153 }
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154
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155 # endif
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156 #endif
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157
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158 /* Allocates a block of length size. NULL is returned if no memory is
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159 available. */
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160 externC void *cyg_mempool_var_try_alloc(
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161 cyg_handle_t varpool,
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162 cyg_int32 size)
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163 {
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164 return ((Cyg_Mempool_Variable *)varpool)->try_alloc(size);
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165 }
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166
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167 /* Frees memory back into variable size pool. */
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168 externC void cyg_mempool_var_free(cyg_handle_t varpool, void *p)
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169 {
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170 cyg_bool b;
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171 b = ((Cyg_Mempool_Variable *)varpool)->free((cyg_uint8 *)p, 0);
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172 CYG_ASSERT( b, "Bad free");
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173 }
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174
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175
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176 /* Returns true if there are any threads waiting for memory in the
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177 given memory pool. */
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178 externC cyg_bool_t cyg_mempool_var_waiting(cyg_handle_t varpool)
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179 {
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180 Cyg_Mempool_Variable *v = (Cyg_Mempool_Variable *)varpool;
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181 Cyg_Mempool_Status stat;
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182
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183 v->get_status( CYG_MEMPOOL_STAT_WAITING, stat );
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184 return (stat.waiting != 0);
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185 }
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186
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187 /* Puts information about a variable memory pool into the structure
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188 provided. */
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189 externC void cyg_mempool_var_get_info(
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190 cyg_handle_t varpool,
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191 cyg_mempool_info *info)
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192 {
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193 Cyg_Mempool_Variable *v = (Cyg_Mempool_Variable *)varpool;
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194 Cyg_Mempool_Status stat;
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195
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196 v->get_status( CYG_MEMPOOL_STAT_ARENASIZE|
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197 CYG_MEMPOOL_STAT_TOTALFREE|
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198 CYG_MEMPOOL_STAT_ARENABASE|
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199 CYG_MEMPOOL_STAT_ORIGSIZE|
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200 CYG_MEMPOOL_STAT_MAXFREE, stat );
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201
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202 info->totalmem = stat.arenasize;
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203 info->freemem = stat.totalfree;
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204 info->size = stat.origsize;
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205 info->base = const_cast<cyg_uint8 *>(stat.arenabase);
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206 info->blocksize = -1;
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207 info->maxfree = stat.maxfree;
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208 }
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209
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210
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211 /* Create a fixed size memory pool */
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212 externC void cyg_mempool_fix_create(
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213 void *base, // base of memory to use for pool
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214 cyg_int32 size, // size of memory in byte
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215 cyg_int32 blocksize, // size of allocation in bytes
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216 cyg_handle_t *handle, // handle of memory pool
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217 cyg_mempool_fix *fix // space to put pool structure in
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218 )
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219 {
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220 CYG_ASSERT_SIZES( cyg_mempool_fix, Cyg_Mempool_Fixed );
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221
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222 Cyg_Mempool_Fixed *t = new((void *)fix) Cyg_Mempool_Fixed (
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223 (cyg_uint8 *)base,
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224 size,
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225 blocksize
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226 );
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227 t=t;
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228
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229 CYG_CHECK_DATA_PTR( handle, "Bad handle pointer" );
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230 *handle = (cyg_handle_t)fix;
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231 }
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232
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233 /* Delete fixed size memory pool */
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234 externC void cyg_mempool_fix_delete(cyg_handle_t fixpool)
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235 {
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236 ((Cyg_Mempool_Fixed *)fixpool)->~Cyg_Mempool_Fixed();
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237 }
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238
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239 #ifdef CYGSEM_MEMALLOC_ALLOCATOR_FIXED_THREADAWARE
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240 /* Allocates a block. This waits if the memory is not
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241 currently available. */
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242 externC void *cyg_mempool_fix_alloc(cyg_handle_t fixpool)
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243 {
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244 return ((Cyg_Mempool_Fixed *)fixpool)->alloc();
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245 }
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246
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247 # ifdef CYGFUN_KERNEL_THREADS_TIMER
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248
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249 /* Allocates a block. This waits for up to delay ticks, if the memory
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250 is not already available. NULL is returned if no memory is
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251 available. */
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252 externC void *cyg_mempool_fix_timed_alloc(
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253 cyg_handle_t fixpool,
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254 cyg_tick_count_t abstime)
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255 {
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256 return ((Cyg_Mempool_Fixed *)fixpool)->alloc(abstime);
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257 }
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258
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259 # endif
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260 #endif
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261
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262 /* Allocates a block. NULL is returned if no memory is available. */
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263 externC void *cyg_mempool_fix_try_alloc(cyg_handle_t fixpool)
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264 {
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265 return ((Cyg_Mempool_Fixed *)fixpool)->try_alloc();
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266 }
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267
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268 /* Frees memory back into fixed size pool. */
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269 externC void cyg_mempool_fix_free(cyg_handle_t fixpool, void *p)
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270 {
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271 cyg_bool b;
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272 b = ((Cyg_Mempool_Fixed *)fixpool)->free((cyg_uint8 *)p);
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273 CYG_ASSERT( b, "Bad free");
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274 }
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275
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276 /* Returns true if there are any threads waiting for memory in the
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277 given memory pool. */
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278 externC cyg_bool_t cyg_mempool_fix_waiting(cyg_handle_t fixpool)
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279 {
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280 Cyg_Mempool_Fixed *f = (Cyg_Mempool_Fixed *)fixpool;
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281 Cyg_Mempool_Status stat;
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282
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283 f->get_status( CYG_MEMPOOL_STAT_WAITING, stat );
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284 return (stat.waiting != 0);
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285 }
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286
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287 /* Puts information about a fixed block memory pool into the structure
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288 provided. */
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289 externC void cyg_mempool_fix_get_info(
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290 cyg_handle_t fixpool,
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291 cyg_mempool_info *info)
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292 {
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293 Cyg_Mempool_Fixed *f = (Cyg_Mempool_Fixed *)fixpool;
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294 Cyg_Mempool_Status stat;
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295
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296 f->get_status( CYG_MEMPOOL_STAT_ARENASIZE|
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297 CYG_MEMPOOL_STAT_TOTALFREE|
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298 CYG_MEMPOOL_STAT_ARENABASE|
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299 CYG_MEMPOOL_STAT_ORIGSIZE|
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300 CYG_MEMPOOL_STAT_BLOCKSIZE|
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301 CYG_MEMPOOL_STAT_MAXFREE, stat );
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302
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303 info->totalmem = stat.arenasize;
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304 info->freemem = stat.totalfree;
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305 info->size = stat.origsize;
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306 info->base = const_cast<cyg_uint8 *>(stat.arenabase);
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307 info->blocksize = stat.blocksize;
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308 info->maxfree = stat.maxfree;
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309 }
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310
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311 // -------------------------------------------------------------------------
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312 // Check structure sizes.
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313 // This class and constructor get run automatically in debug versions
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314 // of the kernel and check that the structures configured in the C
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315 // code are the same size as the C++ classes they should match.
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316
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317 #ifdef CYGPKG_INFRA_DEBUG
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318
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319 class Cyg_Check_Mem_Structure_Sizes
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320 {
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321 int dummy;
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322 public:
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323 Cyg_Check_Mem_Structure_Sizes( int x );
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324
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325 };
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326
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327 #define CYG_CHECK_SIZES(cstruct, cxxstruct) \
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328 if( sizeof(cstruct) != sizeof(cxxstruct) ) \
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329 { \
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330 char *fmt = "Size of C struct " #cstruct \
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331 " != size of C++ struct " #cxxstruct ; \
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332 CYG_TRACE2(1, fmt, sizeof(cstruct) , sizeof(cxxstruct) ); \
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333 fail = true; \
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334 fmt = fmt; \
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335 }
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336
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337 Cyg_Check_Mem_Structure_Sizes::Cyg_Check_Mem_Structure_Sizes(int x)
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338 {
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339 cyg_bool fail = false;
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340
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341 dummy = x+1;
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342
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343 CYG_CHECK_SIZES( cyg_mempool_var, Cyg_Mempool_Variable );
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344 CYG_CHECK_SIZES( cyg_mempool_fix, Cyg_Mempool_Fixed );
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345
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346 CYG_ASSERT( !fail, "Size checks failed");
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347 }
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348
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349 static Cyg_Check_Mem_Structure_Sizes cyg_memalloc_check_structure_sizes(1);
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350
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351 #endif
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352
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353 // -------------------------------------------------------------------------
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354
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355
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356 #endif // ifdef CYGFUN_MEMALLOC_KAPI
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357
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358 // End of kapi.cxx