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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
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1 #ifndef CYGONCE_MEMALLOC_MFIXIMPL_HXX
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2 #define CYGONCE_MEMALLOC_MFIXIMPL_HXX
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3
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4 //==========================================================================
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5 //
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6 // mfiximpl.hxx
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7 //
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8 // Memory pool with fixed block class declarations
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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####
115
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43 //==========================================================================
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44 //#####DESCRIPTIONBEGIN####
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45 //
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46 // Author(s): hmt
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47 // Contributors: jlarmour
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48 // Date: 2000-06-12
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49 // Purpose: Define Mfiximpl class interface
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50 // Description: Inline class for constructing a fixed block allocator
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51 // Usage: #include <cyg/memalloc/mfiximpl.hxx>
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52 //
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53 //
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54 //####DESCRIPTIONEND####
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55 //
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56 //==========================================================================
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57
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58 #include <cyg/infra/cyg_type.h>
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59 #include <cyg/memalloc/common.hxx> // Common memory allocator infra
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60
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61 class Cyg_Mempool_Fixed_Implementation {
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62 protected:
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63 // these constructors are explicitly disallowed
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64 Cyg_Mempool_Fixed_Implementation() {};
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65 // Cyg_Mempool_Fixed_Implementation( Cyg_Mempool_Fixed_Implementation &ref )
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66 // {};
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67 Cyg_Mempool_Fixed_Implementation &
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68 operator=( Cyg_Mempool_Fixed_Implementation &ref )
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69 { return ref; };
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70
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71 cyg_uint32 *bitmap;
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72 cyg_int32 maptop;
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73 cyg_uint8 *mempool;
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74 cyg_int32 numblocks;
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75 cyg_int32 freeblocks;
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76 cyg_int32 blocksize;
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77 cyg_int32 firstfree;
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78 cyg_uint8 *top;
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79
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80 public:
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81 // THIS is the public API of memory pools generally that can have the
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82 // kernel oriented thread-safe package layer atop.
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83 //
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84 // The kernel package is a template whose type parameter is one of
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85 // these. That is the reason there are superfluous parameters here and
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86 // more genereralization than might be expected in a fixed block
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87 // allocator.
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88
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89 // Constructor: gives the base and size of the arena in which memory is
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90 // to be carved out, note that management structures are taken from the
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91 // same arena. The alloc_unit may be any other param in general; it
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92 // comes through from the outer constructor unchanged.
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93 Cyg_Mempool_Fixed_Implementation(
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94 cyg_uint8 *base,
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95 cyg_int32 size,
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96 CYG_ADDRWORD alloc_unit );
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97
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98 // Destructor
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99 ~Cyg_Mempool_Fixed_Implementation();
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100
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101 // get some memory; size is ignored in a fixed block allocator
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102 cyg_uint8 *try_alloc( cyg_int32 size );
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103
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104 // supposedly resize existing allocation. This is defined in the
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105 // fixed block allocator purely for API consistency. It will return
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106 // an error (false) for all values, except for the blocksize
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107 // returns true on success
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108 cyg_uint8 *
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109 resize_alloc( cyg_uint8 *alloc_ptr, cyg_int32 newsize,
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110 cyg_int32 *oldsize=NULL );
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111
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112 // free the memory back to the pool; size ignored here
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113 cyg_bool free( cyg_uint8 *p, cyg_int32 size );
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114
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115 // Get memory pool status
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116 // flags is a bitmask of requested fields to fill in. The flags are
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117 // defined in common.hxx
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118 void get_status( cyg_mempool_status_flag_t /* flags */,
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119 Cyg_Mempool_Status & /* status */ );
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120
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121 };
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122
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123 #include <cyg/memalloc/mfiximpl.inl>
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124
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125 // -------------------------------------------------------------------------
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126 #endif // ifndef CYGONCE_MEMALLOC_MFIXIMPL_HXX
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127 // EOF mfiximpl.hxx