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Comparing libeio/eio.h (file contents):
Revision 1.19 by root, Sat Jun 6 17:25:13 2009 UTC vs.
Revision 1.27 by root, Sun Sep 12 03:36:28 2010 UTC

1/* 1/*
2 * libeio API header 2 * libeio API header
3 * 3 *
4 * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libeio@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010 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 *
… …
58 58
59#ifndef EIO_STRUCT_STAT 59#ifndef EIO_STRUCT_STAT
60# define EIO_STRUCT_STAT struct stat 60# define EIO_STRUCT_STAT struct stat
61#endif 61#endif
62 62
63#ifndef EIO_STRUCT_STATVFS
64# define EIO_STRUCT_STATVFS struct statvfs
65#endif
66
63/* for readdir */ 67/* for readdir */
64 68
65/* eio_readdir flags */ 69/* eio_readdir flags */
66enum { 70enum
71{
67 EIO_READDIR_DENTS = 0x01, /* ptr2 contains eio_dirents, not just the (unsorted) names */ 72 EIO_READDIR_DENTS = 0x01, /* ptr2 contains eio_dirents, not just the (unsorted) names */
68 EIO_READDIR_DIRS_FIRST = 0x02, /* dirents gets sorted into a good stat() ing order to find directories first */ 73 EIO_READDIR_DIRS_FIRST = 0x02, /* dirents gets sorted into a good stat() ing order to find directories first */
69 EIO_READDIR_STAT_ORDER = 0x04, /* dirents gets sorted into a good stat() ing order to quickly stat all files */ 74 EIO_READDIR_STAT_ORDER = 0x04, /* dirents gets sorted into a good stat() ing order to quickly stat all files */
70 EIO_READDIR_FOUND_UNKNOWN = 0x80, /* set by eio_readdir when *_ARRAY was set and any TYPE=UNKNOWN's were found */ 75 EIO_READDIR_FOUND_UNKNOWN = 0x80, /* set by eio_readdir when *_ARRAY was set and any TYPE=UNKNOWN's were found */
71 76
72 EIO_READDIR_CUSTOM1 = 0x100, /* for use by apps */ 77 EIO_READDIR_CUSTOM1 = 0x100, /* for use by apps */
73 EIO_READDIR_CUSTOM2 = 0x200 /* for use by apps */ 78 EIO_READDIR_CUSTOM2 = 0x200 /* for use by apps */
74}; 79};
75 80
76/* using "typical" values in the hope that the compiler will do something sensible */ 81/* using "typical" values in the hope that the compiler will do something sensible */
77enum eio_dtype { 82enum eio_dtype
83{
78 EIO_DT_UNKNOWN = 0, 84 EIO_DT_UNKNOWN = 0,
79 EIO_DT_FIFO = 1, 85 EIO_DT_FIFO = 1,
80 EIO_DT_CHR = 2, 86 EIO_DT_CHR = 2,
87 EIO_DT_MPC = 3, /* multiplexed char device (v7+coherent) */
81 EIO_DT_DIR = 4, 88 EIO_DT_DIR = 4,
89 EIO_DT_NAM = 5, /* xenix special named file */
82 EIO_DT_BLK = 6, 90 EIO_DT_BLK = 6,
91 EIO_DT_MPB = 7, /* multiplexed block device (v7+coherent) */
83 EIO_DT_REG = 8, 92 EIO_DT_REG = 8,
93 EIO_DT_NWK = 9, /* HP-UX network special */
94 EIO_DT_CMP = 9, /* VxFS compressed */
84 EIO_DT_LNK = 10, 95 EIO_DT_LNK = 10,
96 /* DT_SHAD = 11,*/
85 EIO_DT_SOCK = 12, 97 EIO_DT_SOCK = 12,
98 EIO_DT_DOOR = 13, /* solaris door */
86 EIO_DT_WHT = 14, 99 EIO_DT_WHT = 14,
87 EIO_DT_MAX = 15 /* highest DT_VALUE ever, hopefully */ 100 EIO_DT_MAX = 15 /* highest DT_VALUE ever, hopefully */
88}; 101};
89 102
90struct eio_dirent { 103struct eio_dirent
91 char *name; 104{
92 ino_t inode; 105 int nameofs; /* offset of null-terminated name string in (char *)req->ptr2 */
93 unsigned short namelen; 106 unsigned short namelen; /* size of filename without trailing 0 */
94 unsigned char type; 107 unsigned char type; /* one of EIO_DT_* */
95 unsigned char score; /* internal use */ 108 signed char score; /* internal use */
96 /* 0-4 bytes padding */ 109 ino_t inode; /* the inode number, if available, otherwise unspecified */
110};
111
112/* eio_msync flags */
113enum
114{
115 EIO_MS_ASYNC = 1,
116 EIO_MS_INVALIDATE = 2,
117 EIO_MS_SYNC = 4
118};
119
120/* eio_mtouch flags */
121
122enum
123{
124 EIO_MT_MODIFY = 1
97}; 125};
98 126
99/* eio_sync_file_range flags */ 127/* eio_sync_file_range flags */
100 128
101enum { 129enum
130{
102 EIO_SYNC_FILE_RANGE_WAIT_BEFORE = 1, 131 EIO_SYNC_FILE_RANGE_WAIT_BEFORE = 1,
103 EIO_SYNC_FILE_RANGE_WRITE = 2, 132 EIO_SYNC_FILE_RANGE_WRITE = 2,
104 EIO_SYNC_FILE_RANGE_WAIT_AFTER = 4 133 EIO_SYNC_FILE_RANGE_WAIT_AFTER = 4
105}; 134};
106 135
107typedef double eio_tstamp; /* feel free to use double in your code directly */ 136typedef double eio_tstamp; /* feel free to use double in your code directly */
108 137
109/* the eio request structure */ 138/* the eio request structure */
110 139
111enum { 140enum
141{
112 EIO_CUSTOM, 142 EIO_CUSTOM,
113 EIO_OPEN, EIO_CLOSE, EIO_DUP2, 143 EIO_OPEN, EIO_CLOSE, EIO_DUP2,
114 EIO_READ, EIO_WRITE, 144 EIO_READ, EIO_WRITE,
115 EIO_READAHEAD, EIO_SENDFILE, 145 EIO_READAHEAD, EIO_SENDFILE,
116 EIO_STAT, EIO_LSTAT, EIO_FSTAT, 146 EIO_STAT, EIO_LSTAT, EIO_FSTAT,
147 EIO_STATVFS, EIO_FSTATVFS,
117 EIO_TRUNCATE, EIO_FTRUNCATE, 148 EIO_TRUNCATE, EIO_FTRUNCATE,
118 EIO_UTIME, EIO_FUTIME, 149 EIO_UTIME, EIO_FUTIME,
119 EIO_CHMOD, EIO_FCHMOD, 150 EIO_CHMOD, EIO_FCHMOD,
120 EIO_CHOWN, EIO_FCHOWN, 151 EIO_CHOWN, EIO_FCHOWN,
121 EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, 152 EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC,
122 EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE, 153 EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE,
154 EIO_MLOCK, EIO_MLOCKALL,
123 EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, 155 EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME,
124 EIO_MKNOD, EIO_READDIR, 156 EIO_MKNOD, EIO_READDIR,
125 EIO_LINK, EIO_SYMLINK, EIO_READLINK, 157 EIO_LINK, EIO_SYMLINK, EIO_READLINK,
126 EIO_GROUP, EIO_NOP, 158 EIO_GROUP, EIO_NOP,
127 EIO_BUSY 159 EIO_BUSY
128}; 160};
129 161
162/* mlockall constants */
163enum
164{
165 EIO_MCL_CURRENT = 1,
166 EIO_MCL_FUTURE = 2,
167};
168
169/* request priorities */
170
171enum {
172 EIO_PRI_MIN = -4,
173 EIO_PRI_MAX = 4,
174 EIO_PRI_DEFAULT = 0,
175};
176
130/* eio request structure */ 177/* eio request structure */
131/* this structure is mostly read-only */ 178/* this structure is mostly read-only */
132/* when initialising it, all members must be zero-initialised */ 179/* when initialising it, all members must be zero-initialised */
133struct eio_req 180struct eio_req
134{ 181{
135 eio_req volatile *next; /* private ETP */ 182 eio_req volatile *next; /* private ETP */
136 183
137 ssize_t result; /* result of syscall, e.g. result = read (... */ 184 ssize_t result; /* result of syscall, e.g. result = read (... */
138 off_t offs; /* read, write, truncate, readahead, sync_file_range: file offset */ 185 off_t offs; /* read, write, truncate, readahead, sync_file_range: file offset */
139 size_t size; /* read, write, readahead, sendfile, msync, sync_file_range: length */ 186 size_t size; /* read, write, readahead, sendfile, msync, mlock, sync_file_range: length */
140 void *ptr1; /* all applicable requests: pathname, old name */ 187 void *ptr1; /* all applicable requests: pathname, old name; readdir: optional eio_dirents */
141 void *ptr2; /* all applicable requests: new name or memory buffer */ 188 void *ptr2; /* all applicable requests: new name or memory buffer; readdir: name strings */
142 eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ 189 eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */
143 eio_tstamp nv2; /* utime, futime: mtime */ 190 eio_tstamp nv2; /* utime, futime: mtime */
144 191
145 int type; /* EIO_xxx constant ETP */ 192 int type; /* EIO_xxx constant ETP */
146 int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, readdir: flags */ 193 int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, mlockall, readdir: flags */
147 long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode, sync_file_range: flags */ 194 long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode, sync_file_range: flags */
148 long int3; /* chown, fchown: gid; mknod: dev_t */ 195 long int3; /* chown, fchown: gid; mknod: dev_t */
149 int errorno; /* errno value on syscall return */ 196 int errorno; /* errno value on syscall return */
150 197
151 unsigned char flags; /* private */ 198 unsigned char flags; /* private */
… …
159 EIO_REQ_MEMBERS 206 EIO_REQ_MEMBERS
160 207
161 eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ 208 eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */
162}; 209};
163 210
164/* _private_ flags */ 211/* _private_ request flags */
165enum { 212enum {
166 EIO_FLAG_CANCELLED = 0x01, /* request was cancelled */ 213 EIO_FLAG_CANCELLED = 0x01, /* request was cancelled */
167 EIO_FLAG_PTR1_FREE = 0x02, /* need to free(ptr1) */ 214 EIO_FLAG_PTR1_FREE = 0x02, /* need to free(ptr1) */
168 EIO_FLAG_PTR2_FREE = 0x04, /* need to free(ptr2) */ 215 EIO_FLAG_PTR2_FREE = 0x04, /* need to free(ptr2) */
169 EIO_FLAG_GROUPADD = 0x08 /* some request was added to the group */ 216 EIO_FLAG_GROUPADD = 0x08 /* some request was added to the group */
170}; 217};
171 218
172enum { 219/* undocumented/unsupported/private helper */
173 EIO_PRI_MIN = -4, 220/*void eio_page_align (void **addr, size_t *length);*/
174 EIO_PRI_MAX = 4,
175 EIO_PRI_DEFAULT = 0,
176};
177 221
178/* returns < 0 on error, errno set 222/* returns < 0 on error, errno set
179 * 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
180 * 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).
181 * done_poll is called when the need to poll is gone. 225 * done_poll is called when the need to poll is gone.
… …
212eio_req *eio_sync (int pri, eio_cb cb, void *data); 256eio_req *eio_sync (int pri, eio_cb cb, void *data);
213eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data); 257eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data);
214eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data); 258eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data);
215eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); 259eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data);
216eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); 260eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data);
261eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data);
262eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data);
217eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data); 263eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data);
218eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); 264eio_req *eio_close (int fd, int pri, eio_cb cb, void *data);
219eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); 265eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data);
220eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); 266eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data);
221eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); 267eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data);
222eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ 268eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
269eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
223eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); 270eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data);
224eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data); 271eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data);
225eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data); 272eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data);
226eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data); 273eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data);
227eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data); 274eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data);
… …
236eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data); 283eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data);
237eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data); 284eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data);
238eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ 285eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */
239eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ 286eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
240eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ 287eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
288eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
241eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data); 289eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data);
242eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data); 290eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data);
243eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data); 291eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data);
244eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data); 292eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data);
245eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data); 293eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data);
… …
256 304
257/*****************************************************************************/ 305/*****************************************************************************/
258/* request api */ 306/* request api */
259 307
260/* true if the request was cancelled, useful in the invoke callback */ 308/* true if the request was cancelled, useful in the invoke callback */
261#define EIO_CANCELLED(req) ((req)->flags & EIO_FLAG_CANCELLED) 309#define EIO_CANCELLED(req) ((req)->flags & EIO_FLAG_CANCELLED)
262 310
263#define EIO_RESULT(req) ((req)->result) 311#define EIO_RESULT(req) ((req)->result)
264/* returns a pointer to the result buffer allocated by eio */ 312/* returns a pointer to the result buffer allocated by eio */
265#define EIO_BUF(req) ((req)->ptr2) 313#define EIO_BUF(req) ((req)->ptr2)
266#define EIO_STAT_BUF(req) ((EIO_STRUCT_STAT *)EIO_BUF(req)) 314#define EIO_STAT_BUF(req) ((EIO_STRUCT_STAT *)EIO_BUF(req))
315#define EIO_STATVFS_BUF(req) ((EIO_STRUCT_STATVFS *)EIO_BUF(req))
267#define EIO_PATH(req) ((char *)(req)->ptr1) 316#define EIO_PATH(req) ((char *)(req)->ptr1)
268 317
269/* submit a request for execution */ 318/* submit a request for execution */
270void eio_submit (eio_req *req); 319void eio_submit (eio_req *req);
271/* cancel a request as soon fast as possible, if possible */ 320/* cancel a request as soon fast as possible, if possible */
272void eio_cancel (eio_req *req); 321void eio_cancel (eio_req *req);

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