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Comparing libeio/eio.h (file contents):
Revision 1.43 by root, Tue Jul 19 05:18:22 2011 UTC vs.
Revision 1.51 by root, Wed Jul 25 16:12:28 2012 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 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 *
… …
73 typedef ssize_t eio_ssize_t; 73 typedef ssize_t eio_ssize_t;
74 #else 74 #else
75 typedef intptr_t eio_ssize_t; /* or SSIZE_T */ 75 typedef intptr_t eio_ssize_t; /* or SSIZE_T */
76 #endif 76 #endif
77 #if __GNUC__ 77 #if __GNUC__
78 typedef long long eio_ino_t; 78 typedef long long eio_ino_t; /* signed for compatibility to msvc */
79 #else 79 #else
80 typedef __int64 eio_ino_t; /* unsigned not supported by msvc */ 80 typedef __int64 eio_ino_t; /* unsigned not supported by msvc */
81 #endif 81 #endif
82#else 82#else
83 typedef uid_t eio_uid_t; 83 typedef uid_t eio_uid_t;
… …
87#endif 87#endif
88 88
89#ifndef EIO_STRUCT_STATVFS 89#ifndef EIO_STRUCT_STATVFS
90# define EIO_STRUCT_STATVFS struct statvfs 90# define EIO_STRUCT_STATVFS struct statvfs
91#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);
92 102
93/* for readdir */ 103/* for readdir */
94 104
95/* eio_readdir flags */ 105/* eio_readdir flags */
96enum 106enum
… …
158}; 168};
159 169
160/* eio_fallocate flags */ 170/* eio_fallocate flags */
161enum 171enum
162{ 172{
163 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 = 1,
175 EIO_FALLOC_FL_PUNCH_HOLE = 2
164}; 176};
165 177
166/* timestamps and differences - feel free to use double in your code directly */ 178/* timestamps and differences - feel free to use double in your code directly */
167typedef double eio_tstamp; 179typedef double eio_tstamp;
168 180
169/* the eio request structure */ 181/* the eio request structure */
170enum 182enum
171{ 183{
172 EIO_CUSTOM, 184 EIO_CUSTOM,
185 EIO_WD_OPEN, EIO_WD_CLOSE,
186
173 EIO_OPEN, EIO_CLOSE, EIO_DUP2, 187 EIO_CLOSE, EIO_DUP2,
174 EIO_READ, EIO_WRITE, 188 EIO_SEEK, EIO_READ, EIO_WRITE,
175 EIO_READAHEAD, EIO_SENDFILE, 189 EIO_READAHEAD, EIO_SENDFILE,
176 EIO_STAT, EIO_LSTAT, EIO_FSTAT,
177 EIO_STATVFS, EIO_FSTATVFS, 190 EIO_FSTAT, EIO_FSTATVFS,
178 EIO_TRUNCATE, EIO_FTRUNCATE, 191 EIO_FTRUNCATE, EIO_FUTIME, EIO_FCHMOD, EIO_FCHOWN,
179 EIO_UTIME, EIO_FUTIME,
180 EIO_CHMOD, EIO_FCHMOD,
181 EIO_CHOWN, EIO_FCHOWN,
182 EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, 192 EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, EIO_SYNCFS,
183 EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE, EIO_FALLOCATE, 193 EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE, EIO_FALLOCATE,
184 EIO_MLOCK, EIO_MLOCKALL, 194 EIO_MLOCK, EIO_MLOCKALL,
195 EIO_GROUP, EIO_NOP,
196 EIO_BUSY,
197
198 /* these use wd + ptr1, but are emulated */
199 EIO_REALPATH,
200 EIO_STATVFS,
201 EIO_READDIR,
202
203 /* all the following requests use wd + ptr1 as path in xxxat functions */
204 EIO_OPEN,
205 EIO_STAT, EIO_LSTAT,
206 EIO_TRUNCATE,
207 EIO_UTIME,
208 EIO_CHMOD,
209 EIO_CHOWN,
185 EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, 210 EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME,
186 EIO_MKNOD, EIO_READDIR, 211 EIO_MKNOD,
187 EIO_LINK, EIO_SYMLINK, EIO_READLINK, EIO_REALPATH, 212 EIO_LINK, EIO_SYMLINK, EIO_READLINK,
188 EIO_GROUP, EIO_NOP, 213
189 EIO_BUSY 214 EIO_REQ_TYPE_NUM
190}; 215};
216
217/* seek whence modes */
218/* these are guaranteed to hasve the traditional 0, 1, 2 values, */
219/* so you might as wlel use those */
220enum
221{
222 EIO_SEEK_SET = 0,
223 EIO_SEEK_CUR = 1,
224 EIO_SEEK_END = 2
225};
226
191 227
192/* mlockall constants */ 228/* mlockall constants */
193enum 229enum
194{ 230{
195 EIO_MCL_CURRENT = 1, 231 EIO_MCL_CURRENT = 1,
196 EIO_MCL_FUTURE = 2, 232 EIO_MCL_FUTURE = 2
197}; 233};
198 234
199/* request priorities */ 235/* request priorities */
200 236
201enum { 237enum {
202 EIO_PRI_MIN = -4, 238 EIO_PRI_MIN = -4,
203 EIO_PRI_MAX = 4, 239 EIO_PRI_MAX = 4,
204 EIO_PRI_DEFAULT = 0, 240 EIO_PRI_DEFAULT = 0
205}; 241};
206 242
207/* eio request structure */ 243/* eio request structure */
208/* this structure is mostly read-only */ 244/* this structure is mostly read-only */
209/* when initialising it, all members must be zero-initialised */ 245/* when initialising it, all members must be zero-initialised */
210struct eio_req 246struct eio_req
211{ 247{
212 eio_req volatile *next; /* private ETP */ 248 eio_req volatile *next; /* private ETP */
249
250 eio_wd wd; /* all applicable requests: working directory of pathname, old name; wd_open: return wd */
213 251
214 eio_ssize_t result; /* result of syscall, e.g. result = read (... */ 252 eio_ssize_t result; /* result of syscall, e.g. result = read (... */
215 off_t offs; /* read, write, truncate, readahead, sync_file_range, fallocate: file offset, mknod: dev_t */ 253 off_t offs; /* read, write, truncate, readahead, sync_file_range, fallocate: file offset, mknod: dev_t */
216 size_t size; /* read, write, readahead, sendfile, msync, mlock, sync_file_range, fallocate: length */ 254 size_t size; /* read, write, readahead, sendfile, msync, mlock, sync_file_range, fallocate: length */
217 void *ptr1; /* all applicable requests: pathname, old name; readdir: optional eio_dirents */ 255 void *ptr1; /* all applicable requests: pathname, old name; readdir: optional eio_dirents */
… …
219 eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ 257 eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */
220 eio_tstamp nv2; /* utime, futime: mtime */ 258 eio_tstamp nv2; /* utime, futime: mtime */
221 259
222 int type; /* EIO_xxx constant ETP */ 260 int type; /* EIO_xxx constant ETP */
223 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 */
224 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 */
225 long int3; /* chown, fchown: gid */ 263 long int3; /* chown, fchown: gid; rename, link: working directory of new name */
226 int errorno; /* errno value on syscall return */ 264 int errorno; /* errno value on syscall return */
227 265
228#if __i386 || __amd64 266#if __i386 || __amd64
229 unsigned char cancelled; 267 unsigned char cancelled;
230#else 268#else
… …
285 323
286/*****************************************************************************/ 324/*****************************************************************************/
287/* convenience wrappers */ 325/* convenience wrappers */
288 326
289#ifndef EIO_NO_WRAPPERS 327#ifndef EIO_NO_WRAPPERS
328eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data); /* result=wd */
329eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data);
290eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ 330eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */
291eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */ 331eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */
292eio_req *eio_sync (int pri, eio_cb cb, void *data); 332eio_req *eio_sync (int pri, eio_cb cb, void *data);
293eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data); 333eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data);
294eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data); 334eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data);
335eio_req *eio_syncfs (int fd, int pri, eio_cb cb, void *data);
295eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); 336eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data);
296eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); 337eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data);
297eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data); 338eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data);
298eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data); 339eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data);
299eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data); 340eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data);
300eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data); 341eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data);
301eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); 342eio_req *eio_close (int fd, int pri, eio_cb cb, void *data);
302eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); 343eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data);
344eio_req *eio_seek (int fd, off_t offset, int whence, int pri, eio_cb cb, void *data);
303eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); 345eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data);
304eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); 346eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data);
305eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ 347eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
306eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ 348eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
307eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); 349eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data);

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