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annotate packages/language/c/libc/stdio/current/include/stdiofiles.hxx @ 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
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1 #ifndef CYGONCE_LIBC_STDIO_STDIOFILES_HXX
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2 #define CYGONCE_LIBC_STDIO_STDIOFILES_HXX
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3 //========================================================================
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4 //
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5 // stdiofiles.hxx
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6 //
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7 // ISO C library stdio central file access
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8 //
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9 //========================================================================
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10 //####ECOSGPLCOPYRIGHTBEGIN####
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11 // -------------------------------------------
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12 // This file is part of eCos, the Embedded Configurable Operating System.
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13 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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14 //
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15 // eCos is free software; you can redistribute it and/or modify it under
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16 // the terms of the GNU General Public License as published by the Free
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17 // Software Foundation; either version 2 or (at your option) any later version.
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18 //
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19 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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20 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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21 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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22 // for more details.
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23 //
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24 // You should have received a copy of the GNU General Public License along
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25 // with eCos; if not, write to the Free Software Foundation, Inc.,
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26 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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27 //
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28 // As a special exception, if other files instantiate templates or use macros
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29 // or inline functions from this file, or you compile this file and link it
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30 // with other works to produce a work based on this file, this file does not
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31 // by itself cause the resulting work to be covered by the GNU General Public
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32 // License. However the source code for this file must still be made available
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33 // in accordance with section (3) of the GNU General Public License.
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34 //
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35 // This exception does not invalidate any other reasons why a work based on
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36 // this file might be covered by the GNU General Public License.
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37 //
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38 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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39 // at http://sources.redhat.com/ecos/ecos-license/
208
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40 // -------------------------------------------
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41 //####ECOSGPLCOPYRIGHTEND####
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42 //========================================================================
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43 //#####DESCRIPTIONBEGIN####
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44 //
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45 // Author(s): jlarmour
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46 // Contributors:
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47 // Date: 2000-04-19
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48 // Purpose:
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49 // Description:
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50 // Usage: #include <cyg/libc/stdio/stdiosupp.hxx>
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51 //
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52 //####DESCRIPTIONEND####
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53 //
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54 //========================================================================
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55
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56 // CONFIGURATION
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57
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58 #include <pkgconf/libc_stdio.h> // libc stdio configuration
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59
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60 // INCLUDES
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61
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62 #include <cyg/infra/cyg_type.h> // cyg_bool, cyg_ucount8, cyg_ucount16
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63 #include <cyg/libc/stdio/stream.hxx> // Cyg_StdioStream
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64
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65 #ifdef CYGSEM_LIBC_STDIO_THREAD_SAFE_STREAMS
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66 # include <cyg/kernel/mutex.hxx> // mutexes
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67 #endif
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68
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69 // CLASSES
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70
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71 class Cyg_libc_stdio_files
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72 {
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73 // List of open files - global for now
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74 static
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75 Cyg_StdioStream *files[FOPEN_MAX];
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76
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77 # ifdef CYGSEM_LIBC_STDIO_THREAD_SAFE_STREAMS
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78 // lock for the above
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79 static
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80 Cyg_Mutex files_lock;
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81 # endif
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82
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83 public:
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84
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85 # if FOPEN_MAX < 256
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86 typedef cyg_ucount8 fd_t;
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87 # else
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88 typedef cyg_ucount16 fd_t;
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89 # endif
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90
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91 static Cyg_StdioStream *
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92 get_file_stream( fd_t fd );
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93
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94 static void
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95 set_file_stream( fd_t fd, Cyg_StdioStream *stream );
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96
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97
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98 // the following functions lock(), trylock() and unlock() do nothing
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99 // if we haven't got thread-safe streams
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100 static cyg_bool
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101 lock(void);
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102
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103 static cyg_bool
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104 trylock(void);
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105
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106 static void
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107 unlock(void);
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108
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109 }; // class Cyg_libc_stdio_files
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110
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111
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112 // Inline functions for this class
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113 #include <cyg/libc/stdio/stdiofiles.inl>
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114
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115 #endif // CYGONCE_LIBC_STDIO_STDIOFILES_HXX multiple inclusion protection
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116
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117 // EOF stdiofiles.hxx