1 | /* |
1 | /* |
2 | * libeio API header |
2 | * libeio API header |
3 | * |
3 | * |
4 | * Copyright (c) 2007,2008 Marc Alexander Lehmann <libeio@schmorp.de> |
4 | * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libeio@schmorp.de> |
5 | * All rights reserved. |
5 | * All rights reserved. |
6 | * |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
8 | * tion, are permitted provided that the following conditions are met: |
8 | * tion, are permitted provided that the following conditions are met: |
9 | * |
9 | * |
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… | |
38 | */ |
38 | */ |
39 | |
39 | |
40 | #ifndef EIO_H_ |
40 | #ifndef EIO_H_ |
41 | #define EIO_H_ |
41 | #define EIO_H_ |
42 | |
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 | |
43 | #include <stddef.h> |
47 | #include <stddef.h> |
44 | #include <sys/types.h> |
48 | #include <sys/types.h> |
45 | |
49 | |
46 | typedef struct eio_req eio_req; |
50 | typedef struct eio_req eio_req; |
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51 | typedef struct eio_dirent eio_dirent; |
47 | |
52 | |
48 | typedef int (*eio_cb)(eio_req *req); |
53 | typedef int (*eio_cb)(eio_req *req); |
49 | |
54 | |
50 | #ifndef EIO_REQ_MEMBERS |
55 | #ifndef EIO_REQ_MEMBERS |
51 | # define EIO_REQ_MEMBERS |
56 | # define EIO_REQ_MEMBERS |
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53 | |
58 | |
54 | #ifndef EIO_STRUCT_STAT |
59 | #ifndef EIO_STRUCT_STAT |
55 | # define EIO_STRUCT_STAT struct stat |
60 | # define EIO_STRUCT_STAT struct stat |
56 | #endif |
61 | #endif |
57 | |
62 | |
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63 | #ifndef EIO_STRUCT_STATVFS |
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64 | # define EIO_STRUCT_STATVFS struct statvfs |
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65 | #endif |
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66 | |
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67 | /* for readdir */ |
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68 | |
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69 | /* eio_readdir flags */ |
58 | enum { |
70 | enum |
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71 | { |
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72 | EIO_READDIR_DENTS = 0x01, /* ptr2 contains eio_dirents, not just the (unsorted) names */ |
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73 | EIO_READDIR_DIRS_FIRST = 0x02, /* dirents gets sorted into a good stat() ing order to find directories first */ |
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74 | EIO_READDIR_STAT_ORDER = 0x04, /* dirents gets sorted into a good stat() ing order to quickly stat all files */ |
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75 | EIO_READDIR_FOUND_UNKNOWN = 0x80, /* set by eio_readdir when *_ARRAY was set and any TYPE=UNKNOWN's were found */ |
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76 | |
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77 | EIO_READDIR_CUSTOM1 = 0x100, /* for use by apps */ |
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78 | EIO_READDIR_CUSTOM2 = 0x200 /* for use by apps */ |
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79 | }; |
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80 | |
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81 | /* using "typical" values in the hope that the compiler will do something sensible */ |
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82 | enum eio_dtype |
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83 | { |
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84 | EIO_DT_UNKNOWN = 0, |
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85 | EIO_DT_FIFO = 1, |
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86 | EIO_DT_CHR = 2, |
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87 | EIO_DT_MPC = 3, /* multiplexed char device (v7+coherent) */ |
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88 | EIO_DT_DIR = 4, |
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89 | EIO_DT_NAM = 5, /* xenix special named file */ |
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90 | EIO_DT_BLK = 6, |
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91 | EIO_DT_MPB = 7, /* multiplexed block device (v7+coherent) */ |
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92 | EIO_DT_REG = 8, |
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93 | EIO_DT_NWK = 9, /* HP-UX network special */ |
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94 | EIO_DT_CMP = 9, /* VxFS compressed */ |
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95 | EIO_DT_LNK = 10, |
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96 | /* DT_SHAD = 11,*/ |
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97 | EIO_DT_SOCK = 12, |
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98 | EIO_DT_DOOR = 13, /* solaris door */ |
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99 | EIO_DT_WHT = 14, |
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100 | EIO_DT_MAX = 15 /* highest DT_VALUE ever, hopefully */ |
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101 | }; |
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102 | |
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103 | struct eio_dirent |
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104 | { |
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105 | int nameofs; /* offset of null-terminated name string in (char *)req->ptr2 */ |
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106 | unsigned short namelen; /* size of filename without trailing 0 */ |
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107 | unsigned char type; /* one of EIO_DT_* */ |
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108 | signed char score; /* internal use */ |
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109 | ino_t inode; /* the inode number, if available, otherwise unspecified */ |
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110 | }; |
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111 | |
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112 | /* eio_msync flags */ |
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113 | enum |
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114 | { |
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115 | EIO_MS_ASYNC = 1, |
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116 | EIO_MS_INVALIDATE = 2, |
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117 | EIO_MS_SYNC = 4 |
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118 | }; |
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119 | |
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120 | /* eio_mtouch flags */ |
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121 | |
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122 | enum |
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123 | { |
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124 | EIO_MT_MODIFY = 1 |
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125 | }; |
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126 | |
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127 | /* eio_sync_file_range flags */ |
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128 | |
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129 | enum |
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130 | { |
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131 | EIO_SYNC_FILE_RANGE_WAIT_BEFORE = 1, |
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132 | EIO_SYNC_FILE_RANGE_WRITE = 2, |
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133 | EIO_SYNC_FILE_RANGE_WAIT_AFTER = 4 |
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134 | }; |
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135 | |
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136 | typedef double eio_tstamp; /* feel free to use double in your code directly */ |
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137 | |
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138 | /* the eio request structure */ |
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139 | |
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140 | enum |
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141 | { |
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142 | EIO_CUSTOM, |
59 | EIO_OPEN, EIO_CLOSE, EIO_DUP2, |
143 | EIO_OPEN, EIO_CLOSE, EIO_DUP2, |
60 | EIO_READ, EIO_WRITE, |
144 | EIO_READ, EIO_WRITE, |
61 | EIO_READAHEAD, EIO_SENDFILE, |
145 | EIO_READAHEAD, EIO_SENDFILE, |
62 | EIO_STAT, EIO_LSTAT, EIO_FSTAT, |
146 | EIO_STAT, EIO_LSTAT, EIO_FSTAT, |
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147 | EIO_STATVFS, EIO_FSTATVFS, |
63 | EIO_TRUNCATE, EIO_FTRUNCATE, |
148 | EIO_TRUNCATE, EIO_FTRUNCATE, |
64 | EIO_UTIME, EIO_FUTIME, |
149 | EIO_UTIME, EIO_FUTIME, |
65 | EIO_CHMOD, EIO_FCHMOD, |
150 | EIO_CHMOD, EIO_FCHMOD, |
66 | EIO_CHOWN, EIO_FCHOWN, |
151 | EIO_CHOWN, EIO_FCHOWN, |
67 | EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, |
152 | EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, |
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153 | EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE, |
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154 | EIO_MLOCK, EIO_MLOCKALL, |
68 | EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, |
155 | EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, |
69 | EIO_MKNOD, EIO_READDIR, |
156 | EIO_MKNOD, EIO_READDIR, |
70 | EIO_LINK, EIO_SYMLINK, EIO_READLINK, |
157 | EIO_LINK, EIO_SYMLINK, EIO_READLINK, |
71 | EIO_GROUP, EIO_NOP, |
158 | EIO_GROUP, EIO_NOP, |
72 | EIO_BUSY, EIO_CUSTOM |
159 | EIO_BUSY |
73 | }; |
160 | }; |
74 | |
161 | |
75 | typedef double eio_tstamp; /* feel free to use double in your code directly */ |
162 | /* mlockall constants */ |
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163 | enum |
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164 | { |
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165 | EIO_MCL_CURRENT = 1, |
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166 | EIO_MCL_FUTURE = 2, |
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167 | }; |
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168 | |
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169 | /* request priorities */ |
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170 | |
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171 | enum { |
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172 | EIO_PRI_MIN = -4, |
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173 | EIO_PRI_MAX = 4, |
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174 | EIO_PRI_DEFAULT = 0, |
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175 | }; |
76 | |
176 | |
77 | /* eio request structure */ |
177 | /* eio request structure */ |
78 | /* this structure is mostly read-only */ |
178 | /* this structure is mostly read-only */ |
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179 | /* when initialising it, all members must be zero-initialised */ |
79 | struct eio_req |
180 | struct eio_req |
80 | { |
181 | { |
81 | eio_req volatile *next; /* private ETP */ |
182 | eio_req volatile *next; /* private ETP */ |
82 | |
183 | |
83 | ssize_t result; /* result of syscall, e.g. result = read (... */ |
184 | ssize_t result; /* result of syscall, e.g. result = read (... */ |
84 | off_t offs; /* read, write, truncate, readahead: file offset; mknod: dev_t */ |
185 | off_t offs; /* read, write, truncate, readahead, sync_file_range: file offset, mknod: dev_t */ |
85 | size_t size; /* read, write, readahead, sendfile: length */ |
186 | size_t size; /* read, write, readahead, sendfile, msync, mlock, sync_file_range: length */ |
86 | void *ptr1; /* all applicable requests: pathname, old name */ |
187 | void *ptr1; /* all applicable requests: pathname, old name; readdir: optional eio_dirents */ |
87 | void *ptr2; /* all applicable requests: new name or memory buffer */ |
188 | void *ptr2; /* all applicable requests: new name or memory buffer; readdir: name strings */ |
88 | eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ |
189 | eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ |
89 | eio_tstamp nv2; /* utime, futime: mtime */ |
190 | eio_tstamp nv2; /* utime, futime: mtime */ |
90 | |
191 | |
91 | int type; /* EIO_xxx constant ETP */ |
192 | int type; /* EIO_xxx constant ETP */ |
92 | int int1; /* all applicable requests: file descriptor; sendfile: output fd; open: flags */ |
193 | int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, mlockall, readdir: flags */ |
93 | long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode */ |
194 | long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode, sync_file_range: flags */ |
94 | long int3; /* chown, fchown: gid */ |
195 | long int3; /* chown, fchown: gid */ |
95 | int errorno; /* errno value on syscall return */ |
196 | int errorno; /* errno value on syscall return */ |
96 | |
197 | |
97 | unsigned char flags; /* private */ |
198 | unsigned char flags; /* private */ |
98 | signed char pri; /* the priority */ |
199 | signed char pri; /* the priority */ |
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105 | EIO_REQ_MEMBERS |
206 | EIO_REQ_MEMBERS |
106 | |
207 | |
107 | eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ |
208 | eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ |
108 | }; |
209 | }; |
109 | |
210 | |
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211 | /* _private_ request flags */ |
110 | enum { |
212 | enum { |
111 | EIO_FLAG_CANCELLED = 0x01, /* request was cancelled */ |
213 | EIO_FLAG_CANCELLED = 0x01, /* request was cancelled */ |
112 | EIO_FLAG_PTR1_FREE = 0x02, /* need to free(ptr1) */ |
214 | EIO_FLAG_PTR1_FREE = 0x02, /* need to free(ptr1) */ |
113 | EIO_FLAG_PTR2_FREE = 0x04 /* need to free(ptr2) */ |
215 | EIO_FLAG_PTR2_FREE = 0x04, /* need to free(ptr2) */ |
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216 | EIO_FLAG_GROUPADD = 0x08 /* some request was added to the group */ |
114 | }; |
217 | }; |
115 | |
218 | |
116 | enum { |
219 | /* undocumented/unsupported/private helper */ |
117 | EIO_PRI_MIN = -4, |
220 | /*void eio_page_align (void **addr, size_t *length);*/ |
118 | EIO_PRI_MAX = 4, |
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119 | EIO_PRI_DEFAULT = 0, |
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120 | }; |
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121 | |
221 | |
122 | /* returns < 0 on error, errno set |
222 | /* returns < 0 on error, errno set |
123 | * need_poll, if non-zero, will be called when results are available |
223 | * need_poll, if non-zero, will be called when results are available |
124 | * and eio_poll_cb needs to be invoked (it MUST NOT call eio_poll_cb itself). |
224 | * and eio_poll_cb needs to be invoked (it MUST NOT call eio_poll_cb itself). |
125 | * done_poll is called when the need to poll is gone. |
225 | * done_poll is called when the need to poll is gone. |
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154 | eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ |
254 | eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ |
155 | eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */ |
255 | eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */ |
156 | eio_req *eio_sync (int pri, eio_cb cb, void *data); |
256 | eio_req *eio_sync (int pri, eio_cb cb, void *data); |
157 | eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data); |
257 | eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data); |
158 | eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data); |
258 | eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data); |
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259 | eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); |
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260 | eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); |
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261 | eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data); |
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262 | eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data); |
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263 | eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data); |
159 | eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); |
264 | eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); |
160 | eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); |
265 | eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); |
161 | eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
266 | eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
162 | eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
267 | eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
163 | eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
268 | eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
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269 | eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
164 | eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); |
270 | eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); |
165 | eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data); |
271 | eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data); |
166 | eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data); |
272 | eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data); |
167 | eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data); |
273 | eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data); |
168 | eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data); |
274 | eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data); |
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171 | eio_req *eio_utime (const char *path, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); |
277 | eio_req *eio_utime (const char *path, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); |
172 | eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data); |
278 | eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data); |
173 | eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data); |
279 | eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data); |
174 | eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data); |
280 | eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data); |
175 | eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data); |
281 | eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data); |
176 | eio_req *eio_readdir (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ |
282 | eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ |
177 | eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data); |
283 | eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data); |
178 | eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data); |
284 | eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data); |
179 | eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ |
285 | eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ |
180 | eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
286 | eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
181 | eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
287 | eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
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288 | eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
182 | eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data); |
289 | eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data); |
183 | eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
290 | eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
184 | eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
291 | eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
185 | eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
292 | eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
186 | eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data); |
293 | eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data); |
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197 | |
304 | |
198 | /*****************************************************************************/ |
305 | /*****************************************************************************/ |
199 | /* request api */ |
306 | /* request api */ |
200 | |
307 | |
201 | /* true if the request was cancelled, useful in the invoke callback */ |
308 | /* true if the request was cancelled, useful in the invoke callback */ |
202 | #define EIO_CANCELLED(req) ((req)->flags & EIO_FLAG_CANCELLED) |
309 | #define EIO_CANCELLED(req) ((req)->flags & EIO_FLAG_CANCELLED) |
203 | |
310 | |
204 | #define EIO_RESULT(req) ((req)->result) |
311 | #define EIO_RESULT(req) ((req)->result) |
205 | /* returns a pointer to the result buffer allocated by eio */ |
312 | /* returns a pointer to the result buffer allocated by eio */ |
206 | #define EIO_BUF(req) ((req)->ptr2) |
313 | #define EIO_BUF(req) ((req)->ptr2) |
207 | #define EIO_STAT_BUF(req) ((EIO_STRUCT_STAT *)EIO_BUF(req)) |
314 | #define EIO_STAT_BUF(req) ((EIO_STRUCT_STAT *)EIO_BUF(req)) |
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315 | #define EIO_STATVFS_BUF(req) ((EIO_STRUCT_STATVFS *)EIO_BUF(req)) |
208 | #define EIO_PATH(req) ((char *)(req)->ptr1) |
316 | #define EIO_PATH(req) ((char *)(req)->ptr1) |
209 | |
317 | |
210 | /* submit a request for execution */ |
318 | /* submit a request for execution */ |
211 | void eio_submit (eio_req *req); |
319 | void eio_submit (eio_req *req); |
212 | /* cancel a request as soon fast as possible, if possible */ |
320 | /* cancel a request as soon fast as possible, if possible */ |
213 | void eio_cancel (eio_req *req); |
321 | void eio_cancel (eio_req *req); |
… | |
… | |
217 | /*****************************************************************************/ |
325 | /*****************************************************************************/ |
218 | /* convinience functions */ |
326 | /* convinience functions */ |
219 | |
327 | |
220 | ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count); |
328 | ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count); |
221 | |
329 | |
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330 | #ifdef __cplusplus |
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331 | } |
222 | #endif |
332 | #endif |
223 | |
333 | |
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334 | #endif |
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335 | |