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annotate packages/io/common/current/include/file.h @ 3292:7f8e529b4d82 default tip

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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 74dbf4c3f2e1
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 //==========================================================================
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2 //
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3 // io/common/include/file.h
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4 //
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5 // Defines for high level file I/O
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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): gthomas
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43 // Contributors: gthomas
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44 // Date: 2000-01-10
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45 // Purpose:
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46 // Description:
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47 //
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48 //
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49 //####DESCRIPTIONEND####
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50 //
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51 //==========================================================================
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52
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53
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54 #ifndef _CYG_IO_FILE_H_
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55 #define _CYG_IO_FILE_H_
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56
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57 #include <pkgconf/system.h>
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58
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59 //==========================================================================
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60 // If the fileio package is loaded, we need to go through that to do all
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61 // basic IO operations. This code redefines the tags on the structures so
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62 // that they have the names expected by BSD based code.
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63
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64 #ifdef CYGPKG_IO_FILEIO
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65
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66 #include <pkgconf/io_fileio.h>
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67
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68 #define CYG_IOVEC_TAG iovec
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69 #define CYG_UIO_TAG uio
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70 #define CYG_FILEOPS_TAG fileops
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71 #define CYG_FILE_TAG file
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72 #define CYG_SELINFO_TAG selinfo
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73
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74 #include <cyg/fileio/fileio.h>
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75
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76 // File states
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77 #define FREAD CYG_FREAD
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78 #define FWRITE CYG_FWRITE
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79 #define FNONBLOCK CYG_FNONBLOCK
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80 #define FASYNC CYG_FASYNC
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81
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82 // Type of "file"
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83 #define DTYPE_VNODE CYG_FILE_TYPE_FILE /* file */
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84 #define DTYPE_SOCKET CYG_FILE_TYPE_SOCKET /* communications endpoint */
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85
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86 //==========================================================================
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87 // Otherwise define all the structs here...
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88
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89 #else // CYGPKG_IO_FILEIO
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90
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91 // High-level file I/O interfaces
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92 // Derived [in part] from OpenBSD <sys/file.h>, <sys/uio.h>, <sys/fcntl.h>
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93
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94 #include <pkgconf/io.h>
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95 #include <cyg/infra/cyg_type.h>
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96
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97 #define NFILE CYGPKG_IO_NFILE
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98
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99 struct iovec {
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100 void *iov_base; /* Base address. */
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101 CYG_ADDRWORD iov_len; /* Length. */
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102 };
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103
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104 enum uio_rw { UIO_READ, UIO_WRITE };
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105
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106 /* Segment flag values. */
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107 enum uio_seg {
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108 UIO_USERSPACE, /* from user data space */
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109 UIO_SYSSPACE /* from system space */
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110 };
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111
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112 struct uio {
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113 struct iovec *uio_iov; /* pointer to array of iovecs */
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114 int uio_iovcnt; /* number of iovecs in array */
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115 CYG_ADDRWORD uio_offset; /* offset into file this uio corresponds to */
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116 CYG_ADDRWORD uio_resid; /* residual i/o count */
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117 enum uio_seg uio_segflg; /* see above */
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118 enum uio_rw uio_rw; /* see above */
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119 };
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120
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121 /*
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122 * Limits
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123 */
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124 #define UIO_SMALLIOV 8 /* 8 on stack, else malloc */
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125
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126 // Description of open file
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127 struct file {
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128 short f_flag; /* file state */
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129 short f_type; /* descriptor type */
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130 struct fileops {
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131 int (*fo_read)(struct file *fp, struct uio *uio);
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132 int (*fo_write)(struct file *fp, struct uio *uio);
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133 int (*fo_ioctl)(struct file *fp, CYG_ADDRWORD com,
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134 CYG_ADDRWORD data);
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135 int (*fo_select)(struct file *fp, int which);
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136 int (*fo_close)(struct file *fp);
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137 } *f_ops;
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138 CYG_ADDRWORD f_offset;
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139 CYG_ADDRWORD f_data; /* vnode or socket */
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140 };
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141
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142 // File states
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143 #define FREAD 0x01
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144 #define FWRITE 0x02
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145 #define FNONBLOCK 0x10
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146 #define FASYNC 0x20
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147 #define FALLOC 0x80 // File is "busy", i.e. allocated
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148
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149 // Type of "file"
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150 #define DTYPE_VNODE 1 /* file */
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151 #define DTYPE_SOCKET 2 /* communications endpoint */
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152 #define DTYPE_PIPE 3 /* pipe */
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153
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154 externC cyg_bool getfp(int fdes, struct file **fp);
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155 externC int falloc(struct file **fp, int *fd);
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156 externC void ffree(struct file *fp);
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157
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158 //==========================================================================
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159
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160 #endif // CYGPKG_IO_FILEIO
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161
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162 //==========================================================================
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163 #endif // _CYG_IO_FILE_H_