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Comparing libeio/eio.h (file contents):
Revision 1.46 by root, Mon Sep 26 16:54:25 2011 UTC vs.
Revision 1.59 by root, Fri Jun 23 03:23:19 2017 UTC

1/* 1/*
2 * libeio API header 2 * libeio API header
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libeio@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2012,2015,2016 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 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
90# define EIO_STRUCT_STATVFS struct statvfs 90# define EIO_STRUCT_STATVFS struct statvfs
91#endif 91#endif
92 92
93/* managing working directories */ 93/* managing working directories */
94 94
95typedef void *eio_wd; 95typedef struct eio_pwd *eio_wd;
96 96
97#define EIO_CWD 0 /* the current working directory of the process, guaranteed to be a null pointer */ 97#define EIO_CWD 0 /* the current working directory of the process, guaranteed to be a null pointer */
98#define EIO_INVALID_WD ((eio_wd)(int)-1) /* failure return for eio_wd_open */ 98#define EIO_INVALID_WD ((eio_wd)(int)-1) /* failure return for eio_wd_open */
99 99
100eio_wd eio_wd_open_sync (eio_wd wd, const char *path); 100eio_wd eio_wd_open_sync (eio_wd wd, const char *path);
… …
168}; 168};
169 169
170/* eio_fallocate flags */ 170/* eio_fallocate flags */
171enum 171enum
172{ 172{
173 EIO_FALLOC_FL_KEEP_SIZE = 1 /* MUST match the value in linux/falloc.h */ 173 /* these MUST match the value in linux/falloc.h */
174 EIO_FALLOC_FL_KEEP_SIZE = 0x01,
175 EIO_FALLOC_FL_PUNCH_HOLE = 0x02,
176 EIO_FALLOC_FL_COLLAPSE_RANGE = 0x08,
177 EIO_FALLOC_FL_ZERO_RANGE = 0x10
178};
179
180/* eio_rename flags */
181enum
182{
183 /* these MUST match the value in linux/fs.h */
184 EIO_RENAME_NOREPLACE = 1 << 0,
185 EIO_RENAME_EXCHANGE = 1 << 1,
186 EIO_RENAME_WHITEOUT = 1 << 2
174}; 187};
175 188
176/* timestamps and differences - feel free to use double in your code directly */ 189/* timestamps and differences - feel free to use double in your code directly */
177typedef double eio_tstamp; 190typedef double eio_tstamp;
178 191
… …
181{ 194{
182 EIO_CUSTOM, 195 EIO_CUSTOM,
183 EIO_WD_OPEN, EIO_WD_CLOSE, 196 EIO_WD_OPEN, EIO_WD_CLOSE,
184 197
185 EIO_CLOSE, EIO_DUP2, 198 EIO_CLOSE, EIO_DUP2,
186 EIO_READ, EIO_WRITE, 199 EIO_SEEK, EIO_READ, EIO_WRITE, EIO_FCNTL, EIO_IOCTL,
187 EIO_READAHEAD, EIO_SENDFILE, 200 EIO_READAHEAD, EIO_SENDFILE,
188 EIO_FSTAT, EIO_FSTATVFS, 201 EIO_FSTAT, EIO_FSTATVFS,
189 EIO_FTRUNCATE, EIO_FUTIME, EIO_FCHMOD, EIO_FCHOWN, 202 EIO_FTRUNCATE, EIO_FUTIME, EIO_FCHMOD, EIO_FCHOWN,
190 EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, EIO_SYNCFS, 203 EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, EIO_SYNCFS,
191 EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE, EIO_FALLOCATE, 204 EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE, EIO_FALLOCATE,
… …
193 EIO_GROUP, EIO_NOP, 206 EIO_GROUP, EIO_NOP,
194 EIO_BUSY, 207 EIO_BUSY,
195 208
196 /* these use wd + ptr1, but are emulated */ 209 /* these use wd + ptr1, but are emulated */
197 EIO_REALPATH, 210 EIO_REALPATH,
198 EIO_STATVFS,
199 EIO_READDIR, 211 EIO_READDIR,
200 212
201 /* all the following requests use wd + ptr1 as path in xxxat functions */ 213 /* all the following requests use wd + ptr1 as path in xxxat functions */
202 EIO_OPEN, 214 EIO_OPEN,
203 EIO_STAT, EIO_LSTAT, 215 EIO_STAT, EIO_LSTAT, EIO_STATVFS,
204 EIO_TRUNCATE, 216 EIO_TRUNCATE,
205 EIO_UTIME, 217 EIO_UTIME,
206 EIO_CHMOD, 218 EIO_CHMOD,
207 EIO_CHOWN, 219 EIO_CHOWN,
208 EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, 220 EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME,
… …
210 EIO_LINK, EIO_SYMLINK, EIO_READLINK, 222 EIO_LINK, EIO_SYMLINK, EIO_READLINK,
211 223
212 EIO_REQ_TYPE_NUM 224 EIO_REQ_TYPE_NUM
213}; 225};
214 226
227/* seek whence modes */
228/* these are guaranteed to hasve the traditional 0, 1, 2 values, */
229/* so you might as wlel use those */
230enum
231{
232 EIO_SEEK_SET = 0,
233 EIO_SEEK_CUR = 1,
234 EIO_SEEK_END = 2
235};
236
237
215/* mlockall constants */ 238/* mlockall constants */
216enum 239enum
217{ 240{
218 EIO_MCL_CURRENT = 1, 241 EIO_MCL_CURRENT = 1,
219 EIO_MCL_FUTURE = 2, 242 EIO_MCL_FUTURE = 2
220}; 243};
221 244
222/* request priorities */ 245/* request priorities */
223 246
224enum { 247enum {
225 EIO_PRI_MIN = -4, 248 EIO_PRI_MIN = -4,
226 EIO_PRI_MAX = 4, 249 EIO_PRI_MAX = 4,
227 EIO_PRI_DEFAULT = 0, 250 EIO_PRI_DEFAULT = 0
228}; 251};
229 252
230/* eio request structure */ 253/* eio request structure */
231/* this structure is mostly read-only */ 254/* this structure is mostly read-only */
232/* when initialising it, all members must be zero-initialised */ 255/* when initialising it, all members must be zero-initialised */
… …
237 eio_wd wd; /* all applicable requests: working directory of pathname, old name; wd_open: return wd */ 260 eio_wd wd; /* all applicable requests: working directory of pathname, old name; wd_open: return wd */
238 261
239 eio_ssize_t result; /* result of syscall, e.g. result = read (... */ 262 eio_ssize_t result; /* result of syscall, e.g. result = read (... */
240 off_t offs; /* read, write, truncate, readahead, sync_file_range, fallocate: file offset, mknod: dev_t */ 263 off_t offs; /* read, write, truncate, readahead, sync_file_range, fallocate: file offset, mknod: dev_t */
241 size_t size; /* read, write, readahead, sendfile, msync, mlock, sync_file_range, fallocate: length */ 264 size_t size; /* read, write, readahead, sendfile, msync, mlock, sync_file_range, fallocate: length */
242 void *ptr1; /* all applicable requests: pathname, old name; readdir: optional eio_dirents */ 265 void *ptr1; /* all applicable requests: pathname, old name, readdir: optional eio_dirents */
243 void *ptr2; /* all applicable requests: new name or memory buffer; readdir: name strings */ 266 void *ptr2; /* all applicable requests: new name or memory buffer; readdir: name strings */
244 eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ 267 eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */
245 eio_tstamp nv2; /* utime, futime: mtime */ 268 eio_tstamp nv2; /* utime, futime: mtime */
246 269
247 int type; /* EIO_xxx constant ETP */
248 int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, mlockall, readdir: flags */ 270 int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, mlockall, readdir: flags */
249 long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode, sync_file_range, fallocate: flags */ 271 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 */
250 long int3; /* chown, fchown: gid; rename: working directory of new name */ 272 long int3; /* chown, fchown: gid; rename, link: working directory of new name */
251 int errorno; /* errno value on syscall return */ 273 int errorno; /* errno value on syscall return */
252 274
275 unsigned char flags; /* private */
276
277 signed char type;/* EIO_xxx constant ETP */
278 signed char pri; /* the priority ETP */
253#if __i386 || __amd64 279#if __i386 || __amd64
254 unsigned char cancelled; 280 unsigned char cancelled; /* ETP */
255#else 281#else
256 sig_atomic_t cancelled; 282 sig_atomic_t cancelled; /* ETP */
257#endif 283#endif
258
259 unsigned char flags; /* private */
260 signed char pri; /* the priority */
261 284
262 void *data; 285 void *data;
263 eio_cb finish; 286 eio_cb finish;
264 void (*destroy)(eio_req *req); /* called when request no longer needed */ 287 void (*destroy)(eio_req *req); /* called when request no longer needed */
265 void (*feed)(eio_req *req); /* only used for group requests */ 288 void (*feed)(eio_req *req); /* only used for group requests */
266 289
267 EIO_REQ_MEMBERS 290 EIO_REQ_MEMBERS
268 291
269 eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ 292 eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private ETP */
270}; 293};
271 294
272/* _private_ request flags */ 295/* _private_ request flags */
273enum { 296enum {
274 EIO_FLAG_PTR1_FREE = 0x01, /* need to free(ptr1) */ 297 EIO_FLAG_PTR1_FREE = 0x01, /* need to free(ptr1) */
275 EIO_FLAG_PTR2_FREE = 0x02, /* need to free(ptr2) */ 298 EIO_FLAG_PTR2_FREE = 0x02, /* need to free(ptr2) */
276 EIO_FLAG_GROUPADD = 0x04 /* some request was added to the group */
277}; 299};
278 300
279/* undocumented/unsupported/private helper */ 301/* undocumented/unsupported/private helper */
280/*void eio_page_align (void **addr, size_t *length);*/ 302/*void eio_page_align (void **addr, size_t *length);*/
281 303
… …
308unsigned int eio_npending (void); /* number of finished but unhandled requests */ 330unsigned int eio_npending (void); /* number of finished but unhandled requests */
309unsigned int eio_nthreads (void); /* number of worker threads in use currently */ 331unsigned int eio_nthreads (void); /* number of worker threads in use currently */
310 332
311/*****************************************************************************/ 333/*****************************************************************************/
312/* convenience wrappers */ 334/* convenience wrappers */
335/* these do not expose advanced syscalls and directory fds */
313 336
314#ifndef EIO_NO_WRAPPERS 337#ifndef EIO_NO_WRAPPERS
338eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data); /* result=wd */
339eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data);
315eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ 340eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */
316eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */ 341eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */
317eio_req *eio_sync (int pri, eio_cb cb, void *data); 342eio_req *eio_sync (int pri, eio_cb cb, void *data);
318eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data); 343eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data);
319eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data); 344eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data);
… …
324eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data); 349eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data);
325eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data); 350eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data);
326eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data); 351eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data);
327eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); 352eio_req *eio_close (int fd, int pri, eio_cb cb, void *data);
328eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); 353eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data);
354eio_req *eio_seek (int fd, off_t offset, int whence, int pri, eio_cb cb, void *data);
329eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); 355eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data);
330eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); 356eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data);
357eio_req *eio_fcntl (int fd, int cmd, void *arg, int pri, eio_cb cb, void *data);
358eio_req *eio_ioctl (int fd, unsigned long request, void *buf, int pri, eio_cb cb, void *data);
331eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ 359eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
332eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ 360eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
333eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); 361eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data);
334eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data); 362eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data);
335eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data); 363eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data);

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