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1 | /* |
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2 | * libeio API header |
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3 | * |
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4 | * Copyright (c) 2007,2008,2009,2010,2011,2012,2015,2016,2017 Marc Alexander Lehmann <libeio@schmorp.de> |
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5 | * All rights reserved. |
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6 | * |
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7 | * Redistribution and use in source and binary forms, with or without modifica- |
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8 | * tion, are permitted provided that the following conditions are met: |
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9 | * |
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10 | * 1. Redistributions of source code must retain the above copyright notice, |
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11 | * this list of conditions and the following disclaimer. |
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12 | * |
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13 | * 2. Redistributions in binary form must reproduce the above copyright |
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14 | * notice, this list of conditions and the following disclaimer in the |
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15 | * documentation and/or other materials provided with the distribution. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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18 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
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19 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
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20 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
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21 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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22 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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23 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
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25 | * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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26 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | * |
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28 | * Alternatively, the contents of this file may be used under the terms of |
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29 | * the GNU General Public License ("GPL") version 2 or any later version, |
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30 | * in which case the provisions of the GPL are applicable instead of |
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31 | * the above. If you wish to allow the use of your version of this file |
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32 | * only under the terms of the GPL and not to allow others to use your |
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33 | * version of this file under the BSD license, indicate your decision |
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34 | * by deleting the provisions above and replace them with the notice |
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35 | * and other provisions required by the GPL. If you do not delete the |
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36 | * provisions above, a recipient may use your version of this file under |
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37 | * either the BSD or the GPL. |
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38 | */ |
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39 | |
1 | #ifndef EIO_H_ |
40 | #ifndef EIO_H_ |
2 | #define EIO_H_ |
41 | #define EIO_H_ |
3 | |
42 | |
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43 | #ifdef __cplusplus |
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44 | extern "C" { |
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45 | #endif |
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46 | |
4 | #include <stddef.h> |
47 | #include <stddef.h> |
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48 | #include <signal.h> |
5 | #include <sys/types.h> |
49 | #include <sys/types.h> |
6 | |
50 | |
7 | typedef struct eio_req eio_req; |
51 | typedef struct eio_req eio_req; |
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52 | typedef struct eio_dirent eio_dirent; |
8 | |
53 | |
9 | typedef int (*eio_cb)(eio_req *req); |
54 | typedef int (*eio_cb)(eio_req *req); |
10 | |
55 | |
11 | #ifndef EIO_COMMON |
56 | #ifndef EIO_REQ_MEMBERS |
12 | # define EIO_COMMON \ |
57 | # define EIO_REQ_MEMBERS |
13 | eio_cb finish; \ |
58 | #endif |
14 | void (*destroy)(eio_req *req);\ |
59 | |
15 | void *data |
60 | #ifndef EIO_STRUCT_STAT |
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61 | # ifdef _WIN32 |
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62 | # define EIO_STRUCT_STAT struct _stati64 |
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63 | # define EIO_STRUCT_STATI64 |
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64 | # else |
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65 | # define EIO_STRUCT_STAT struct stat |
16 | #endif |
66 | # endif |
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67 | #endif |
17 | |
68 | |
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69 | #ifdef _WIN32 |
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70 | typedef int eio_uid_t; |
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71 | typedef int eio_gid_t; |
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72 | #ifdef __MINGW32__ /* no intptr_t */ |
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73 | typedef ssize_t eio_ssize_t; |
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74 | #else |
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75 | typedef intptr_t eio_ssize_t; /* or SSIZE_T */ |
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76 | #endif |
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77 | #if __GNUC__ |
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78 | typedef long long eio_ino_t; /* signed for compatibility to msvc */ |
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79 | #else |
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80 | typedef __int64 eio_ino_t; /* unsigned not supported by msvc */ |
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81 | #endif |
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82 | #else |
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83 | typedef uid_t eio_uid_t; |
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84 | typedef gid_t eio_gid_t; |
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85 | typedef ssize_t eio_ssize_t; |
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86 | typedef ino_t eio_ino_t; |
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87 | #endif |
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88 | |
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89 | #ifndef EIO_STRUCT_STATVFS |
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90 | # define EIO_STRUCT_STATVFS struct statvfs |
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91 | #endif |
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92 | |
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93 | /* managing working directories */ |
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94 | |
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95 | typedef struct eio_pwd *eio_wd; |
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96 | |
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97 | #define EIO_CWD 0 /* the current working directory of the process, guaranteed to be a null pointer */ |
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98 | #define EIO_INVALID_WD ((eio_wd)(int)-1) /* failure return for eio_wd_open */ |
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99 | |
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100 | eio_wd eio_wd_open_sync (eio_wd wd, const char *path); |
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101 | void eio_wd_close_sync (eio_wd wd); |
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102 | |
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103 | /* for readdir */ |
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104 | |
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105 | /* eio_readdir flags */ |
18 | enum { |
106 | enum |
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107 | { |
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108 | EIO_READDIR_DENTS = 0x01, /* ptr2 contains eio_dirents, not just the (unsorted) names */ |
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109 | EIO_READDIR_DIRS_FIRST = 0x02, /* dirents gets sorted into a good stat() ing order to find directories first */ |
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110 | EIO_READDIR_STAT_ORDER = 0x04, /* dirents gets sorted into a good stat() ing order to quickly stat all files */ |
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111 | EIO_READDIR_FOUND_UNKNOWN = 0x80, /* set by eio_readdir when *_ARRAY was set and any TYPE=UNKNOWN's were found */ |
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112 | |
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113 | EIO_READDIR_CUSTOM1 = 0x100, /* for use by apps */ |
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114 | EIO_READDIR_CUSTOM2 = 0x200 /* for use by apps */ |
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115 | }; |
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116 | |
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117 | /* using "typical" values in the hope that the compiler will do something sensible */ |
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118 | enum eio_dtype |
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119 | { |
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120 | EIO_DT_UNKNOWN = 0, |
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121 | EIO_DT_FIFO = 1, |
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122 | EIO_DT_CHR = 2, |
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123 | EIO_DT_MPC = 3, /* multiplexed char device (v7+coherent) */ |
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124 | EIO_DT_DIR = 4, |
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125 | EIO_DT_NAM = 5, /* xenix special named file */ |
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126 | EIO_DT_BLK = 6, |
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127 | EIO_DT_MPB = 7, /* multiplexed block device (v7+coherent) */ |
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128 | EIO_DT_REG = 8, |
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129 | EIO_DT_NWK = 9, /* HP-UX network special */ |
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130 | EIO_DT_CMP = 9, /* VxFS compressed */ |
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131 | EIO_DT_LNK = 10, |
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132 | /* DT_SHAD = 11,*/ |
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133 | EIO_DT_SOCK = 12, |
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134 | EIO_DT_DOOR = 13, /* solaris door */ |
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135 | EIO_DT_WHT = 14, |
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136 | EIO_DT_MAX = 15 /* highest DT_VALUE ever, hopefully */ |
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137 | }; |
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138 | |
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139 | struct eio_dirent |
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140 | { |
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141 | int nameofs; /* offset of null-terminated name string in (char *)req->ptr2 */ |
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142 | unsigned short namelen; /* size of filename without trailing 0 */ |
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143 | unsigned char type; /* one of EIO_DT_* */ |
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144 | signed char score; /* internal use */ |
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145 | eio_ino_t inode; /* the inode number, if available, otherwise unspecified */ |
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146 | }; |
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147 | |
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148 | /* eio_msync flags */ |
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149 | enum |
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150 | { |
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151 | EIO_MS_ASYNC = 1, |
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152 | EIO_MS_INVALIDATE = 2, |
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153 | EIO_MS_SYNC = 4 |
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154 | }; |
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155 | |
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156 | /* eio_mtouch flags */ |
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157 | enum |
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158 | { |
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159 | EIO_MT_MODIFY = 1 |
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160 | }; |
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161 | |
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162 | /* eio_sync_file_range flags */ |
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163 | enum |
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164 | { |
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165 | EIO_SYNC_FILE_RANGE_WAIT_BEFORE = 1, |
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166 | EIO_SYNC_FILE_RANGE_WRITE = 2, |
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167 | EIO_SYNC_FILE_RANGE_WAIT_AFTER = 4 |
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168 | }; |
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169 | |
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170 | /* eio_fallocate flags */ |
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171 | enum |
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172 | { |
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173 | /* these MUST match the value in linux/falloc.h */ |
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174 | EIO_FALLOC_FL_KEEP_SIZE = 0x01, |
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175 | EIO_FALLOC_FL_PUNCH_HOLE = 0x02, |
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176 | EIO_FALLOC_FL_COLLAPSE_RANGE = 0x08, |
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177 | EIO_FALLOC_FL_ZERO_RANGE = 0x10, |
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178 | EIO_FALLOC_FL_INSERT_RANGE = 0x20, |
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179 | EIO_FALLOC_FL_UNSHARE_RANGE = 0x40 |
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180 | }; |
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181 | |
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182 | /* eio_rename flags */ |
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183 | enum |
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184 | { |
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185 | /* these MUST match the value in linux/fs.h */ |
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186 | EIO_RENAME_NOREPLACE = 1 << 0, |
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187 | EIO_RENAME_EXCHANGE = 1 << 1, |
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188 | EIO_RENAME_WHITEOUT = 1 << 2 |
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189 | }; |
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190 | |
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191 | /* timestamps and differences - feel free to use double in your code directly */ |
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192 | typedef double eio_tstamp; |
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193 | |
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194 | /* the eio request structure */ |
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195 | enum |
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196 | { |
19 | EIO_QUIT, |
197 | EIO_CUSTOM, |
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198 | EIO_WD_OPEN, EIO_WD_CLOSE, |
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199 | |
20 | EIO_OPEN, EIO_CLOSE, EIO_DUP2, |
200 | EIO_CLOSE, EIO_DUP2, |
21 | EIO_READ, EIO_WRITE, |
201 | EIO_SEEK, EIO_READ, EIO_WRITE, EIO_FCNTL, EIO_IOCTL, |
22 | EIO_READAHEAD, EIO_SENDFILE, |
202 | EIO_READAHEAD, EIO_SENDFILE, |
23 | EIO_STAT, EIO_LSTAT, EIO_FSTAT, |
203 | EIO_FSTAT, EIO_FSTATVFS, |
24 | EIO_TRUNCATE, EIO_FTRUNCATE, |
204 | EIO_FTRUNCATE, EIO_FUTIME, EIO_FCHMOD, EIO_FCHOWN, |
25 | EIO_UTIME, EIO_FUTIME, |
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26 | EIO_CHMOD, EIO_FCHMOD, |
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27 | EIO_CHOWN, EIO_FCHOWN, |
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28 | EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, |
205 | EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, EIO_SYNCFS, |
29 | EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, |
206 | EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE, EIO_FALLOCATE, |
30 | EIO_MKNOD, EIO_READDIR, |
207 | EIO_MLOCK, EIO_MLOCKALL, |
31 | EIO_LINK, EIO_SYMLINK, EIO_READLINK, |
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32 | EIO_GROUP, EIO_NOP, |
208 | EIO_GROUP, EIO_NOP, |
33 | EIO_BUSY, |
209 | EIO_BUSY, |
34 | }; |
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35 | |
210 | |
36 | typedef double eio_tstamp; /* feel free to use double in your code directly */ |
211 | /* these use wd + ptr1, but are emulated */ |
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212 | EIO_REALPATH, |
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213 | EIO_READDIR, |
37 | |
214 | |
38 | /* eio request structure */ |
215 | /* all the following requests use wd + ptr1 as path in xxxat functions */ |
39 | /* this structure is mostly read-only */ |
216 | EIO_OPEN, |
40 | struct eio_req |
217 | EIO_STAT, EIO_LSTAT, EIO_STATVFS, |
41 | { |
218 | EIO_TRUNCATE, |
42 | eio_req volatile *next; /* private */ |
219 | EIO_UTIME, |
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220 | EIO_CHMOD, |
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221 | EIO_CHOWN, |
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222 | EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, |
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223 | EIO_MKNOD, |
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224 | EIO_LINK, EIO_SYMLINK, EIO_READLINK, |
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225 | EIO_SLURP, /* open + read + close */ |
43 | |
226 | |
44 | ssize_t result; /* result of syscall, e.g. result = read (... */ |
227 | EIO_REQ_TYPE_NUM |
45 | off_t offs; /* read, write, truncate, readahead: file offset; mknod: dev_t */ |
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46 | size_t size; /* read, write, readahead, sendfile: length */ |
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47 | void *ptr1; /* all applicable requests: pathname, old name */ |
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48 | void *ptr2; /* all applicable requests: new name or memory buffer */ |
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49 | eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ |
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50 | eio_tstamp nv2; /* utime, futime: mtime */ |
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51 | |
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52 | int type; /* EIO_xxx constant */ |
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53 | int int1; /* all applicable requests: file descriptor; sendfile: output fd; open: flags */ |
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54 | long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode */ |
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55 | long int3; /* chown, fchown: gid */ |
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56 | int errorno; /* errno value on syscall return */ |
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57 | |
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58 | unsigned char flags; /* private */ |
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59 | unsigned char pri; /* the priority */ |
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60 | |
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61 | void (*feed)(eio_req *req); |
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62 | |
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63 | EIO_COMMON; |
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64 | |
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65 | eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ |
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66 | }; |
228 | }; |
67 | |
229 | |
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230 | /* seek whence modes */ |
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231 | /* these are guaranteed to hasve the traditional 0, 1, 2 values, */ |
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232 | /* so you might as wlel use those */ |
68 | enum { |
233 | enum |
69 | EIO_FLAG_CANCELLED = 0x01, /* request was cancelled */ |
234 | { |
70 | EIO_FLAG_PTR2_FREE = 0x02, /* need to free(ptr2) */ |
235 | EIO_SEEK_SET = 0, |
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236 | EIO_SEEK_CUR = 1, |
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237 | EIO_SEEK_END = 2 |
71 | }; |
238 | }; |
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239 | |
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240 | |
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241 | /* mlockall constants */ |
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242 | enum |
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243 | { |
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244 | EIO_MCL_CURRENT = 1, |
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245 | EIO_MCL_FUTURE = 2, |
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246 | EIO_MCL_ONFAULT = 4 |
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247 | }; |
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248 | |
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249 | /* request priorities */ |
72 | |
250 | |
73 | enum { |
251 | enum { |
74 | EIO_PRI_MIN = -4, |
252 | EIO_PRI_MIN = -4, |
75 | EIO_PRI_MAX = 4, |
253 | EIO_PRI_MAX = 4, |
76 | |
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77 | EIO_DEFAULT_PRI = 0, |
254 | EIO_PRI_DEFAULT = 0 |
78 | EIO_PRI_BIAS = -EIO_PRI_MIN, |
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79 | EIO_NUM_PRI = EIO_PRI_MAX + EIO_PRI_BIAS + 1, |
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80 | }; |
255 | }; |
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256 | |
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257 | /* eio request structure */ |
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258 | /* this structure is mostly read-only */ |
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259 | /* when initialising it, all members must be zero-initialised */ |
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260 | struct eio_req |
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261 | { |
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262 | eio_req volatile *next; /* private ETP */ |
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263 | |
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264 | eio_wd wd; /* all applicable requests: working directory of pathname, old name; wd_open: return wd */ |
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265 | |
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266 | eio_ssize_t result; /* result of syscall, e.g. result = read (... */ |
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267 | off_t offs; /* read, write, truncate, readahead, sync_file_range, fallocate, slurp: file offset, mknod: dev_t */ |
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268 | size_t size; /* read, write, readahead, sendfile, msync, mlock, sync_file_range, fallocate, slurp: length */ |
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269 | void *ptr1; /* all applicable requests: pathname, old name, readdir: optional eio_dirents */ |
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270 | void *ptr2; /* all applicable requests: new name or memory buffer; readdir: name strings */ |
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271 | eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ |
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272 | eio_tstamp nv2; /* utime, futime: mtime */ |
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273 | |
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274 | int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, mlockall, readdir: flags */ |
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275 | long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode, seek: whence, fcntl, ioctl: request, sync_file_range, fallocate, rename: flags */ |
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276 | long int3; /* chown, fchown: gid; rename, link: working directory of new name */ |
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277 | int errorno; /* errno value on syscall return */ |
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278 | |
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279 | unsigned char flags; /* private */ |
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280 | |
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281 | signed char type;/* EIO_xxx constant ETP */ |
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282 | signed char pri; /* the priority ETP */ |
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283 | #if __i386 || __amd64 |
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284 | unsigned char cancelled; /* ETP */ |
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285 | #else |
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286 | sig_atomic_t cancelled; /* ETP */ |
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287 | #endif |
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288 | |
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289 | void *data; |
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290 | eio_cb finish; |
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291 | void (*destroy)(eio_req *req); /* called when request no longer needed */ |
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292 | void (*feed)(eio_req *req); /* only used for group requests */ |
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293 | |
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294 | EIO_REQ_MEMBERS |
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295 | |
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296 | eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private ETP */ |
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297 | }; |
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298 | |
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299 | /* _private_ request flags */ |
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300 | enum { |
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301 | EIO_FLAG_PTR1_FREE = 0x01, /* need to free(ptr1) */ |
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302 | EIO_FLAG_PTR2_FREE = 0x02, /* need to free(ptr2) */ |
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303 | }; |
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304 | |
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305 | /* undocumented/unsupported/private helper */ |
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306 | /*void eio_page_align (void **addr, size_t *length);*/ |
81 | |
307 | |
82 | /* returns < 0 on error, errno set |
308 | /* returns < 0 on error, errno set |
83 | * need_poll, if non-zero, will be called when results are available |
309 | * need_poll, if non-zero, will be called when results are available |
84 | * and eio_poll_cb needs to be invoked (it MUST NOT call eio_poll_cb itself). |
310 | * and eio_poll_cb needs to be invoked (it MUST NOT call eio_poll_cb itself). |
85 | * done_poll is called when the need to poll is gone. |
311 | * done_poll is called when the need to poll is gone. |
… | |
… | |
99 | * maximum wanted number |
325 | * maximum wanted number |
100 | * or maximum idle number of threads */ |
326 | * or maximum idle number of threads */ |
101 | void eio_set_min_parallel (unsigned int nthreads); |
327 | void eio_set_min_parallel (unsigned int nthreads); |
102 | void eio_set_max_parallel (unsigned int nthreads); |
328 | void eio_set_max_parallel (unsigned int nthreads); |
103 | void eio_set_max_idle (unsigned int nthreads); |
329 | void eio_set_max_idle (unsigned int nthreads); |
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330 | void eio_set_idle_timeout (unsigned int seconds); |
104 | |
331 | |
105 | unsigned int eio_nreqs (void); /* number of requests in-flight */ |
332 | unsigned int eio_nreqs (void); /* number of requests in-flight */ |
106 | unsigned int eio_nready (void); /* number of not-yet handled requests */ |
333 | unsigned int eio_nready (void); /* number of not-yet handled requests */ |
107 | unsigned int eio_npending (void); /* numbe rof finished but unhandled requests */ |
334 | unsigned int eio_npending (void); /* number of finished but unhandled requests */ |
108 | unsigned int eio_nthreads (void); /* number of worker threads in use currently */ |
335 | unsigned int eio_nthreads (void); /* number of worker threads in use currently */ |
109 | |
336 | |
110 | /*****************************************************************************/ |
337 | /*****************************************************************************/ |
111 | /* high-level request API */ |
338 | /* convenience wrappers */ |
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339 | /* these do not expose advanced syscalls and directory fds */ |
112 | |
340 | |
113 | eio_req *eio_fsync (int fd, eio_cb cb); |
341 | #ifndef EIO_NO_WRAPPERS |
114 | eio_req *eio_fdatasync (int fd, eio_cb cb); |
342 | eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data); /* result=wd */ |
115 | eio_req *eio_dupclose (int fd, eio_cb cb); |
343 | eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data); |
116 | eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb); |
344 | eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ |
117 | eio_req *eio_read (int fd, off_t offs, size_t length, char *data, eio_cb cb); |
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118 | eio_req *eio_write (int fd, off_t offs, size_t length, char *data, eio_cb cb); |
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119 | eio_req *eio_fstat (int fd, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */ |
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120 | eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, eio_cb cb); |
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121 | eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb); |
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122 | eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb); |
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123 | eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb); |
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124 | eio_req *eio_dup2 (int fd, int fd2, eio_cb cb); |
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125 | eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb); |
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126 | eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb); |
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127 | eio_req *eio_readlink (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */ |
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128 | eio_req *eio_stat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */ |
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129 | eio_req *eio_lstat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */ |
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130 | eio_req *eio_utime (const char *path, eio_tstamp atime, eio_tstamp mtime, eio_cb cb); |
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131 | eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb); |
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132 | eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb); |
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133 | eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb); |
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134 | eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb); |
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135 | eio_req *eio_unlink (const char *path, eio_cb cb); |
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136 | eio_req *eio_rmdir (const char *path, eio_cb cb); |
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137 | eio_req *eio_readdir (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */ |
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138 | eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb); |
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139 | eio_req *eio_busy (eio_tstamp delay, eio_cb cb); /* ties a thread for this long, simulating busyness */ |
345 | eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */ |
140 | eio_req *eio_nop (eio_cb cb); /* does nothing except go through the whole process */ |
346 | eio_req *eio_sync (int pri, eio_cb cb, void *data); |
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347 | eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data); |
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348 | eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data); |
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349 | eio_req *eio_syncfs (int fd, int pri, eio_cb cb, void *data); |
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350 | eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); |
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351 | eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); |
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352 | eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data); |
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353 | eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data); |
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354 | eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data); |
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355 | eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data); |
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356 | eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); |
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357 | eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); |
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358 | eio_req *eio_seek (int fd, off_t offset, int whence, int pri, eio_cb cb, void *data); |
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359 | eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
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360 | eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
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361 | eio_req *eio_fcntl (int fd, int cmd, void *arg, int pri, eio_cb cb, void *data); |
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362 | eio_req *eio_ioctl (int fd, unsigned long request, void *buf, int pri, eio_cb cb, void *data); |
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363 | eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
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364 | eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
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365 | eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); |
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366 | eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data); |
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367 | eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data); |
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368 | eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data); |
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369 | eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data); |
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370 | eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data); |
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371 | eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data); |
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372 | eio_req *eio_utime (const char *path, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); |
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373 | eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data); |
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374 | eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data); |
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375 | eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data); |
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376 | eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data); |
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377 | eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ |
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378 | eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data); |
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379 | eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data); |
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380 | eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ |
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381 | eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ |
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382 | eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
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383 | eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
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384 | eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
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385 | eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data); |
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386 | eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
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387 | eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
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388 | eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
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389 | eio_req *eio_slurp (const char *path, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
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390 | eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data); |
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391 | #endif |
141 | |
392 | |
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393 | /*****************************************************************************/ |
142 | /* for groups */ |
394 | /* groups */ |
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395 | |
143 | eio_req *eio_grp (eio_cb cb); |
396 | eio_req *eio_grp (eio_cb cb, void *data); |
144 | void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit); |
397 | void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit); |
145 | void eio_grp_limit (eio_req *grp, int limit); |
398 | void eio_grp_limit (eio_req *grp, int limit); |
146 | void eio_grp_add (eio_req *grp, eio_req *req); |
399 | void eio_grp_add (eio_req *grp, eio_req *req); |
147 | void eio_grp_cancel (eio_req *grp); /* cancels all sub requests but not the group */ |
400 | void eio_grp_cancel (eio_req *grp); /* cancels all sub requests but not the group */ |
148 | |
401 | |
149 | /*****************************************************************************/ |
402 | /*****************************************************************************/ |
150 | /* low-level request API */ |
403 | /* request api */ |
151 | |
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152 | /* must be used to initialise eio_req's */ |
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153 | #define EIO_INIT(req,prio,finish_cb, destroy_cb) \ |
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154 | memset ((req), 0, sizeof (eio_req)); \ |
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155 | (req)->pri = (prio) + EIO_PRI_BIAS; \ |
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156 | (req)->finish = (finish_cb); \ |
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157 | (req)->destroy = (destroy_cb) |
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158 | |
404 | |
159 | /* true if the request was cancelled, useful in the invoke callback */ |
405 | /* true if the request was cancelled, useful in the invoke callback */ |
160 | #define EIO_CANCELLED(req) ((req)->flags & EIO_FLAG_CANCELLED) |
406 | #define EIO_CANCELLED(req) ((req)->cancelled) |
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407 | |
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408 | #define EIO_RESULT(req) ((req)->result) |
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409 | /* returns a pointer to the result buffer allocated by eio */ |
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410 | #define EIO_BUF(req) ((req)->ptr2) |
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411 | #define EIO_STAT_BUF(req) ((EIO_STRUCT_STAT *)EIO_BUF(req)) |
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412 | #define EIO_STATVFS_BUF(req) ((EIO_STRUCT_STATVFS *)EIO_BUF(req)) |
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413 | #define EIO_PATH(req) ((char *)(req)->ptr1) |
161 | |
414 | |
162 | /* submit a request for execution */ |
415 | /* submit a request for execution */ |
163 | void eio_submit (eio_req *req); |
416 | void eio_submit (eio_req *req); |
164 | /* cancel a request as soon fast as possible */ |
417 | /* cancel a request as soon fast as possible, if possible */ |
165 | void eio_cancel (eio_req *req); |
418 | void eio_cancel (eio_req *req); |
166 | /* destroy a request that has never been submitted */ |
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167 | void eio_destroy (eio_req *req); |
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168 | |
419 | |
169 | #endif |
420 | /*****************************************************************************/ |
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421 | /* convenience functions */ |
170 | |
422 | |
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423 | eio_ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count); |
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424 | int eio_mlockall_sync (int flags); |
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425 | |
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426 | #ifdef __cplusplus |
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427 | } |
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428 | #endif |
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429 | |
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430 | #endif |
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431 | |