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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 b32b05dbfe18
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 //==========================================================================
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2 //
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3 // dir.cxx
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4 //
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5 // Fileio directory support
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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): nickg
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43 // Contributors: nickg
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44 // Date: 2000-05-25
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45 // Purpose: Fileio directory support
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46 // Description: Support for directory operations.
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47 //
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48 //
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49 //
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50 //
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51 //####DESCRIPTIONEND####
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52 //
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53 //==========================================================================
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54
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55 #include <pkgconf/hal.h>
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56 #include <pkgconf/io_fileio.h>
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57
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58 #include <cyg/infra/cyg_trac.h> // tracing macros
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59 #include <cyg/infra/cyg_ass.h> // assertion macros
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60
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61 #include <stdarg.h> // for fcntl()
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62
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63 #include "fio.h" // Private header
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64
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65 #include <dirent.h> // struct dirent
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66
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67 //==========================================================================
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68
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69 #define DIROPEN_RETURN_ERR( err ) \
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70 CYG_MACRO_START \
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71 errno = err; \
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72 CYG_REPORT_RETVAL( NULL ); \
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73 return NULL; \
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74 CYG_MACRO_END
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75
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76 //==========================================================================
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77 // Implement filesystem locking protocol.
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78
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79 #define LOCK_FS( _mte_ ) { \
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80 CYG_ASSERT(_mte_ != NULL, "Bad mount table entry"); \
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81 cyg_fs_lock( _mte_, (_mte_)->fs->syncmode); \
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82 }
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83
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84 #define UNLOCK_FS( _mte_ ) cyg_fs_unlock( _mte_, (_mte_)->fs->syncmode)
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85
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86 //==========================================================================
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87 // Open a directory for reading
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88
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89 extern DIR *opendir( const char *dirname )
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90 {
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91 FILEIO_ENTRY();
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92
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93 CYG_CANCELLATION_POINT;
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94
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95 int ret = 0;
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96 int fd;
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97 cyg_file *file;
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98 cyg_mtab_entry *mte = cyg_cdir_mtab_entry;
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99 cyg_dir dir = cyg_cdir_dir;
115
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100 const char *name = dirname;
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101
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102 fd = cyg_fd_alloc(1); // Never return fd 0
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103
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104 if( fd < 0 )
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105 DIROPEN_RETURN_ERR(EMFILE);
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106
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107 file = cyg_file_alloc();
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108
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109 if( file == NULL )
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110 {
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111 cyg_fd_free(fd);
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112 DIROPEN_RETURN_ERR(ENFILE);
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113 }
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114
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115 ret = cyg_mtab_lookup( &dir, &name, &mte );
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116
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117 if( 0 != ret )
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118 {
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119 cyg_fd_free(fd);
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120 cyg_file_free(file);
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121 DIROPEN_RETURN_ERR(ENOENT);
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122 }
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123
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124 LOCK_FS( mte );
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125
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126 ret = mte->fs->opendir( mte, dir, name, file );
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127
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128 UNLOCK_FS( mte );
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129
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130 if( 0 != ret )
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131 {
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132 cyg_fd_free(fd);
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133 cyg_file_free(file);
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134 DIROPEN_RETURN_ERR(ret);
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135 }
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136
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137 file->f_flag |= CYG_FDIR|CYG_FREAD;
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138 file->f_mte = mte;
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139 file->f_syncmode = mte->fs->syncmode;
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140
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141 cyg_fd_assign( fd, file );
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142
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143 DIR *dirp = (DIR *)fd;
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144
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145 FILEIO_RETURN_VALUE(dirp);
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146 }
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147
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148 //==========================================================================
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149 // Read a directory entry.
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150 // This is the thread-unsafe version that uses a static result buffer.
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151 // It just calls the thread-safe version to do the work.
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152
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153 extern struct dirent *readdir( DIR *dirp )
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154 {
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155 FILEIO_ENTRY();
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156
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157 static struct dirent ent;
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158 struct dirent *result;
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159 int err;
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160
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161 err = readdir_r( dirp, &ent, &result );
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162
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163 if( err != 0 )
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164 {
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165 errno = err;
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166 FILEIO_RETURN_VALUE( NULL );
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167 }
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168
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169 FILEIO_RETURN_VALUE( result );
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170 }
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171
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172 //==========================================================================
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173
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174 extern int readdir_r( DIR *dirp, struct dirent *entry, struct dirent **result )
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175 {
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176 FILEIO_ENTRY();
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177
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178 int fd = (int)dirp;
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179 ssize_t res;
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180
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181 *result = NULL;
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182
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183 if( NULL == dirp )
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184 {
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185 FILEIO_RETURN_VALUE( EBADF );
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186 }
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187
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188 #ifdef CYGPKG_FILEIO_DIRENT_DTYPE
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189 // d_type is only supposed by a few filesystems, so make sure other
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190 // filesystems return a sane value;
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191 entry->d_type = 0;
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192 #endif
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193
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194 res = read( fd, (void *)entry, sizeof(struct dirent));
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195
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196 if( res < 0 )
208
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197 {
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198 FILEIO_RETURN_VALUE( errno );
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199 }
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200
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201 if( res > 0 )
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202 *result = entry;
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203
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204 #ifdef CYGPKG_FILEIO_DIRENT_DTYPE
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205 // Only the lower bits contain the type of file, so and those out.
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206 entry->d_type &= S_IFMT;
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207 #endif
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208
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209
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210 FILEIO_RETURN( ENOERR );
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211 }
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212
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213 //==========================================================================
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214
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215 extern void rewinddir( DIR *dirp )
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216 {
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217 FILEIO_ENTRY_VOID();
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218
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219 int fd = (int)dirp;
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220
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221 lseek( fd, 0, SEEK_SET );
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222
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223 FILEIO_RETURN_VOID();
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224 }
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225
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226 //==========================================================================
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227
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228 extern int closedir( DIR *dirp )
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229 {
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230 FILEIO_ENTRY();
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231
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232 int fd = (int)dirp;
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233 int err = close( fd );
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234
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235 FILEIO_RETURN_VALUE( err );
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236 }
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237
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238 // -------------------------------------------------------------------------
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239 // EOF dir.cxx