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annotate packages/services/memalloc/common/current/include/kapi.h @ 210:d2c90368aeef

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Merge from eCos master repository on 2002-05-23-21:39:14-BST
author jlarmour
date Thu, 23 May 2002 22:59:51 +0000
parents e0c0827131d1
children 40a7aad7873c
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1 #ifndef CYGONCE_MEMALLOC_KAPI_H
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2 #define CYGONCE_MEMALLOC_KAPI_H
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3
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4 /*==========================================================================
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5 //
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6 // kapi.h
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7 //
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8 // Memory allocator portion of kernel C API
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9 //
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10 //==========================================================================
208
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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.
210
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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####
115
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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: 2000-06-12
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49 // Purpose: Memory allocator portion of kernel C API
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50 // Description: This is intentionally only to be included from
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51 // <cyg/kernel/kapi.h>
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52 // Usage: This file should not be used directly - instead it should
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53 // be used via <cyg/kernel/kapi.h>
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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 /* TYPE DEFINITIONS */
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65
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66 struct cyg_mempool_var;
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67 typedef struct cyg_mempool_var cyg_mempool_var;
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68
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69 struct cyg_mempool_fix;
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70 typedef struct cyg_mempool_fix cyg_mempool_fix;
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71
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72 /*-----------------------------------------------------------------------*/
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73 /* Memory pools */
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74
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75 /* There are two sorts of memory pools. A variable size memory pool
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76 is for allocating blocks of any size. A fixed size memory pool, has
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77 the block size specified when the pool is created, and only provides
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78 blocks of that size. */
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79
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80 /* Create a variable size memory pool */
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81 void cyg_mempool_var_create(
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82 void *base, /* base of memory to use for pool */
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83 cyg_int32 size, /* size of memory in bytes */
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84 cyg_handle_t *handle, /* returned handle of memory pool */
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85 cyg_mempool_var *var /* space to put pool structure in */
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86 );
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87
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88 /* Delete variable size memory pool */
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89 void cyg_mempool_var_delete(cyg_handle_t varpool);
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90
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91 #ifdef CYGSEM_MEMALLOC_ALLOCATOR_VARIABLE_THREADAWARE
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92
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93 /* Allocates a block of length size. This waits if the memory is not
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94 currently available. */
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95 void *cyg_mempool_var_alloc(cyg_handle_t varpool, cyg_int32 size);
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96
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97 # ifdef CYGFUN_KERNEL_THREADS_TIMER
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98
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99 /* Allocates a block of length size. This waits until abstime,
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100 if the memory is not already available. NULL is returned if
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101 no memory is available. */
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102 void *cyg_mempool_var_timed_alloc(
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103 cyg_handle_t varpool,
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104 cyg_int32 size,
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105 cyg_tick_count_t abstime);
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106
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107 # endif
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108 #endif
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109
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110 /* Allocates a block of length size. NULL is returned if no memory is
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111 available. */
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112 void *cyg_mempool_var_try_alloc(
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113 cyg_handle_t varpool,
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114 cyg_int32 size);
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115
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116 /* Frees memory back into variable size pool. */
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117 void cyg_mempool_var_free(cyg_handle_t varpool, void *p);
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118
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119 /* Returns true if there are any threads waiting for memory in the
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120 given memory pool. */
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121 cyg_bool_t cyg_mempool_var_waiting(cyg_handle_t varpool);
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122
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123 typedef struct {
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124 cyg_int32 totalmem;
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125 cyg_int32 freemem;
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126 void *base;
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127 cyg_int32 size;
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128 cyg_int32 blocksize;
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129 cyg_int32 maxfree; // The largest free block
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130 } cyg_mempool_info;
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131
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132 /* Puts information about a variable memory pool into the structure
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133 provided. */
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134 void cyg_mempool_var_get_info(cyg_handle_t varpool, cyg_mempool_info *info);
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135
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136 /* Create a fixed size memory pool */
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137 void cyg_mempool_fix_create(
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138 void *base, // base of memory to use for pool
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139 cyg_int32 size, // size of memory in byte
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140 cyg_int32 blocksize, // size of allocation in bytes
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141 cyg_handle_t *handle, // handle of memory pool
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142 cyg_mempool_fix *fix // space to put pool structure in
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143 );
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144
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145 /* Delete fixed size memory pool */
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146 void cyg_mempool_fix_delete(cyg_handle_t fixpool);
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147
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148 #ifdef CYGSEM_MEMALLOC_ALLOCATOR_FIXED_THREADAWARE
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149 /* Allocates a block. This waits if the memory is not
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150 currently available. */
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151 void *cyg_mempool_fix_alloc(cyg_handle_t fixpool);
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152
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153 # ifdef CYGFUN_KERNEL_THREADS_TIMER
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154
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155 /* Allocates a block. This waits until abstime, if the memory
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156 is not already available. NULL is returned if no memory is
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157 available. */
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158 void *cyg_mempool_fix_timed_alloc(
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159 cyg_handle_t fixpool,
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160 cyg_tick_count_t abstime);
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161
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162 # endif
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163 #endif
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164
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165 /* Allocates a block. NULL is returned if no memory is available. */
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166 void *cyg_mempool_fix_try_alloc(cyg_handle_t fixpool);
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167
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168 /* Frees memory back into fixed size pool. */
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169 void cyg_mempool_fix_free(cyg_handle_t fixpool, void *p);
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170
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171 /* Returns true if there are any threads waiting for memory in the
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172 given memory pool. */
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173 cyg_bool_t cyg_mempool_fix_waiting(cyg_handle_t fixpool);
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174
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175 /* Puts information about a variable memory pool into the structure
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176 provided. */
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177 void cyg_mempool_fix_get_info(cyg_handle_t fixpool, cyg_mempool_info *info);
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178
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179
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180
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181 #endif /* ifndef CYGONCE_MEMALLOC_KAPI_H */
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182 /* EOF kapi.h */