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Comparing libeio/eio.h (file contents):
Revision 1.39 by root, Thu Jul 14 19:31:43 2011 UTC vs.
Revision 1.55 by root, Sat Jun 13 00:06:13 2015 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 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,
… …
65# define EIO_STRUCT_STAT struct stat 65# define EIO_STRUCT_STAT struct stat
66# endif 66# endif
67#endif 67#endif
68 68
69#ifdef _WIN32 69#ifdef _WIN32
70typedef int eio_uid_t; 70 typedef int eio_uid_t;
71typedef int eio_gid_t; 71 typedef int eio_gid_t;
72 #ifdef __MINGW32__ /* no intptr_t */
73 typedef ssize_t eio_ssize_t;
74 #else
72typedef intptr_t eio_ssize_t; /* or SSIZE_T */ 75 typedef intptr_t eio_ssize_t; /* or SSIZE_T */
76 #endif
77 #if __GNUC__
78 typedef long long eio_ino_t; /* signed for compatibility to msvc */
79 #else
80 typedef __int64 eio_ino_t; /* unsigned not supported by msvc */
81 #endif
73#else 82#else
74typedef uid_t eio_uid_t; 83 typedef uid_t eio_uid_t;
75typedef gid_t eio_gid_t; 84 typedef gid_t eio_gid_t;
76typedef ssize_t eio_ssize_t; 85 typedef ssize_t eio_ssize_t;
86 typedef ino_t eio_ino_t;
77#endif 87#endif
78 88
79#ifndef EIO_STRUCT_STATVFS 89#ifndef EIO_STRUCT_STATVFS
80# define EIO_STRUCT_STATVFS struct statvfs 90# define EIO_STRUCT_STATVFS struct statvfs
81#endif 91#endif
92
93/* managing working directories */
94
95typedef struct eio_pwd *eio_wd;
96
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 */
99
100eio_wd eio_wd_open_sync (eio_wd wd, const char *path);
101void eio_wd_close_sync (eio_wd wd);
82 102
83/* for readdir */ 103/* for readdir */
84 104
85/* eio_readdir flags */ 105/* eio_readdir flags */
86enum 106enum
… …
120{ 140{
121 int nameofs; /* offset of null-terminated name string in (char *)req->ptr2 */ 141 int nameofs; /* offset of null-terminated name string in (char *)req->ptr2 */
122 unsigned short namelen; /* size of filename without trailing 0 */ 142 unsigned short namelen; /* size of filename without trailing 0 */
123 unsigned char type; /* one of EIO_DT_* */ 143 unsigned char type; /* one of EIO_DT_* */
124 signed char score; /* internal use */ 144 signed char score; /* internal use */
125 ino_t inode; /* the inode number, if available, otherwise unspecified */ 145 eio_ino_t inode; /* the inode number, if available, otherwise unspecified */
126}; 146};
127 147
128/* eio_msync flags */ 148/* eio_msync flags */
129enum 149enum
130{ 150{
… …
148}; 168};
149 169
150/* eio_fallocate flags */ 170/* eio_fallocate flags */
151enum 171enum
152{ 172{
153 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
154}; 178};
155 179
156/* timestamps and differences - feel free to use double in your code directly */ 180/* timestamps and differences - feel free to use double in your code directly */
157typedef double eio_tstamp; 181typedef double eio_tstamp;
158 182
159/* the eio request structure */ 183/* the eio request structure */
160enum 184enum
161{ 185{
162 EIO_CUSTOM, 186 EIO_CUSTOM,
187 EIO_WD_OPEN, EIO_WD_CLOSE,
188
163 EIO_OPEN, EIO_CLOSE, EIO_DUP2, 189 EIO_CLOSE, EIO_DUP2,
164 EIO_READ, EIO_WRITE, 190 EIO_SEEK, EIO_READ, EIO_WRITE,
165 EIO_READAHEAD, EIO_SENDFILE, 191 EIO_READAHEAD, EIO_SENDFILE,
166 EIO_STAT, EIO_LSTAT, EIO_FSTAT,
167 EIO_STATVFS, EIO_FSTATVFS, 192 EIO_FSTAT, EIO_FSTATVFS,
168 EIO_TRUNCATE, EIO_FTRUNCATE, 193 EIO_FTRUNCATE, EIO_FUTIME, EIO_FCHMOD, EIO_FCHOWN,
169 EIO_UTIME, EIO_FUTIME,
170 EIO_CHMOD, EIO_FCHMOD,
171 EIO_CHOWN, EIO_FCHOWN,
172 EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, 194 EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, EIO_SYNCFS,
173 EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE, EIO_FALLOCATE, 195 EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE, EIO_FALLOCATE,
174 EIO_MLOCK, EIO_MLOCKALL, 196 EIO_MLOCK, EIO_MLOCKALL,
197 EIO_GROUP, EIO_NOP,
198 EIO_BUSY,
199
200 /* these use wd + ptr1, but are emulated */
201 EIO_REALPATH,
202 EIO_READDIR,
203
204 /* all the following requests use wd + ptr1 as path in xxxat functions */
205 EIO_OPEN,
206 EIO_STAT, EIO_LSTAT, EIO_STATVFS,
207 EIO_TRUNCATE,
208 EIO_UTIME,
209 EIO_CHMOD,
210 EIO_CHOWN,
175 EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, 211 EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME,
176 EIO_MKNOD, EIO_READDIR, 212 EIO_MKNOD,
177 EIO_LINK, EIO_SYMLINK, EIO_READLINK, EIO_REALPATH, 213 EIO_LINK, EIO_SYMLINK, EIO_READLINK,
178 EIO_GROUP, EIO_NOP, 214
179 EIO_BUSY 215 EIO_REQ_TYPE_NUM
180}; 216};
217
218/* seek whence modes */
219/* these are guaranteed to hasve the traditional 0, 1, 2 values, */
220/* so you might as wlel use those */
221enum
222{
223 EIO_SEEK_SET = 0,
224 EIO_SEEK_CUR = 1,
225 EIO_SEEK_END = 2
226};
227
181 228
182/* mlockall constants */ 229/* mlockall constants */
183enum 230enum
184{ 231{
185 EIO_MCL_CURRENT = 1, 232 EIO_MCL_CURRENT = 1,
186 EIO_MCL_FUTURE = 2, 233 EIO_MCL_FUTURE = 2
187}; 234};
188 235
189/* request priorities */ 236/* request priorities */
190 237
191enum { 238enum {
192 EIO_PRI_MIN = -4, 239 EIO_PRI_MIN = -4,
193 EIO_PRI_MAX = 4, 240 EIO_PRI_MAX = 4,
194 EIO_PRI_DEFAULT = 0, 241 EIO_PRI_DEFAULT = 0
195}; 242};
196 243
197/* eio request structure */ 244/* eio request structure */
198/* this structure is mostly read-only */ 245/* this structure is mostly read-only */
199/* when initialising it, all members must be zero-initialised */ 246/* when initialising it, all members must be zero-initialised */
200struct eio_req 247struct eio_req
201{ 248{
202 eio_req volatile *next; /* private ETP */ 249 eio_req volatile *next; /* private ETP */
250
251 eio_wd wd; /* all applicable requests: working directory of pathname, old name; wd_open: return wd */
203 252
204 eio_ssize_t result; /* result of syscall, e.g. result = read (... */ 253 eio_ssize_t result; /* result of syscall, e.g. result = read (... */
205 off_t offs; /* read, write, truncate, readahead, sync_file_range, fallocate: file offset, mknod: dev_t */ 254 off_t offs; /* read, write, truncate, readahead, sync_file_range, fallocate: file offset, mknod: dev_t */
206 size_t size; /* read, write, readahead, sendfile, msync, mlock, sync_file_range, fallocate: length */ 255 size_t size; /* read, write, readahead, sendfile, msync, mlock, sync_file_range, fallocate: length */
207 void *ptr1; /* all applicable requests: pathname, old name; readdir: optional eio_dirents */ 256 void *ptr1; /* all applicable requests: pathname, old name; readdir: optional eio_dirents */
208 void *ptr2; /* all applicable requests: new name or memory buffer; readdir: name strings */ 257 void *ptr2; /* all applicable requests: new name or memory buffer; readdir: name strings */
209 eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ 258 eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */
210 eio_tstamp nv2; /* utime, futime: mtime */ 259 eio_tstamp nv2; /* utime, futime: mtime */
211 260
212 int type; /* EIO_xxx constant ETP */
213 int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, mlockall, readdir: flags */ 261 int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, mlockall, readdir: flags */
214 long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode, sync_file_range, fallocate: flags */ 262 long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode, seek: whence, sync_file_range, fallocate: flags */
215 long int3; /* chown, fchown: gid */ 263 long int3; /* chown, fchown: gid; rename, link: working directory of new name */
216 int errorno; /* errno value on syscall return */ 264 int errorno; /* errno value on syscall return */
217 265
266 unsigned char flags; /* private */
267
268 signed char type;/* EIO_xxx constant ETP */
269 signed char pri; /* the priority ETP */
218#if __i386 || __amd64 270#if __i386 || __amd64
219 unsigned char cancelled; 271 unsigned char cancelled; /* ETP */
220#else 272#else
221 sig_atomic_t cancelled; 273 sig_atomic_t cancelled; /* ETP */
222#endif 274#endif
223
224 unsigned char flags; /* private */
225 signed char pri; /* the priority */
226 275
227 void *data; 276 void *data;
228 eio_cb finish; 277 eio_cb finish;
229 void (*destroy)(eio_req *req); /* called when request no longer needed */ 278 void (*destroy)(eio_req *req); /* called when request no longer needed */
230 void (*feed)(eio_req *req); /* only used for group requests */ 279 void (*feed)(eio_req *req); /* only used for group requests */
231 280
232 EIO_REQ_MEMBERS 281 EIO_REQ_MEMBERS
233 282
234 eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ 283 eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private ETP */
235}; 284};
236 285
237/* _private_ request flags */ 286/* _private_ request flags */
238enum { 287enum {
239 EIO_FLAG_PTR1_FREE = 0x01, /* need to free(ptr1) */ 288 EIO_FLAG_PTR1_FREE = 0x01, /* need to free(ptr1) */
… …
275 324
276/*****************************************************************************/ 325/*****************************************************************************/
277/* convenience wrappers */ 326/* convenience wrappers */
278 327
279#ifndef EIO_NO_WRAPPERS 328#ifndef EIO_NO_WRAPPERS
329eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data); /* result=wd */
330eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data);
280eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ 331eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */
281eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */ 332eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */
282eio_req *eio_sync (int pri, eio_cb cb, void *data); 333eio_req *eio_sync (int pri, eio_cb cb, void *data);
283eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data); 334eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data);
284eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data); 335eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data);
336eio_req *eio_syncfs (int fd, int pri, eio_cb cb, void *data);
285eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); 337eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data);
286eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); 338eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data);
287eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data); 339eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data);
288eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data); 340eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data);
289eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data); 341eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data);
290eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data); 342eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data);
291eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); 343eio_req *eio_close (int fd, int pri, eio_cb cb, void *data);
292eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); 344eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data);
345eio_req *eio_seek (int fd, off_t offset, int whence, int pri, eio_cb cb, void *data);
293eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); 346eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data);
294eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); 347eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data);
295eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ 348eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
296eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ 349eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
297eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); 350eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data);
298eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data); 351eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data);
299eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data); 352eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data);
300eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data); 353eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data);
301eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data); 354eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data);
302eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data); 355eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data);
303eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data); 356eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data);
304eio_req *eio_utime (const char *path, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); 357eio_req *eio_utime (const char *path, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data);
305eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data); 358eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data);
306eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data); 359eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data);
307eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data); 360eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data);
308eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data); 361eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data);
309eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ 362eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */
310eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data); 363eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data);
311eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data); 364eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data);

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