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Comparing libeio/eio.h (file contents):
Revision 1.5 by root, Sun May 11 19:11:05 2008 UTC vs.
Revision 1.41 by root, Tue Jul 19 05:10:46 2011 UTC

1/*
2 * libeio API header
3 *
4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libeio@schmorp.de>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
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-
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-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
38 */
39
1#ifndef EIO_H_ 40#ifndef EIO_H_
2#define EIO_H_ 41#define EIO_H_
3 42
43#ifdef __cplusplus
44extern "C" {
45#endif
46
4#include <stddef.h> 47#include <stddef.h>
48#include <signal.h>
5#include <sys/types.h> 49#include <sys/types.h>
6 50
7typedef struct eio_req eio_req; 51typedef struct eio_req eio_req;
52typedef struct eio_dirent eio_dirent;
8 53
9typedef int (*eio_cb)(eio_req *req); 54typedef int (*eio_cb)(eio_req *req);
10 55
11#ifndef EIO_COMMON 56#ifndef EIO_REQ_MEMBERS
12# define EIO_COMMON void *data 57# define EIO_REQ_MEMBERS
58#endif
59
60#ifndef EIO_STRUCT_STAT
61# ifdef _WIN32
62# define EIO_STRUCT_STAT struct _stati64
63# define EIO_STRUCT_STATI64
64# else
65# define EIO_STRUCT_STAT struct stat
13#endif 66# endif
67#endif
14 68
69#ifdef _WIN32
70 typedef int eio_uid_t;
71 typedef int eio_gid_t;
72 typedef intptr_t eio_ssize_t; /* or SSIZE_T */
73 #if __GNUC__
74 typedef long long eio_ino_t;
75 #else
76 typedef __int64 eio_ino_t; /* unsigned not supported by msvc */
77 #endif
78#else
79 typedef uid_t eio_uid_t;
80 typedef gid_t eio_gid_t;
81 typedef ssize_t eio_ssize_t;
82 typedef ino_t eio_ino_t;
83#endif
84
85#ifndef EIO_STRUCT_STATVFS
86# define EIO_STRUCT_STATVFS struct statvfs
87#endif
88
89/* for readdir */
90
91/* eio_readdir flags */
15enum { 92enum
93{
94 EIO_READDIR_DENTS = 0x01, /* ptr2 contains eio_dirents, not just the (unsorted) names */
95 EIO_READDIR_DIRS_FIRST = 0x02, /* dirents gets sorted into a good stat() ing order to find directories first */
96 EIO_READDIR_STAT_ORDER = 0x04, /* dirents gets sorted into a good stat() ing order to quickly stat all files */
97 EIO_READDIR_FOUND_UNKNOWN = 0x80, /* set by eio_readdir when *_ARRAY was set and any TYPE=UNKNOWN's were found */
98
99 EIO_READDIR_CUSTOM1 = 0x100, /* for use by apps */
100 EIO_READDIR_CUSTOM2 = 0x200 /* for use by apps */
101};
102
103/* using "typical" values in the hope that the compiler will do something sensible */
104enum eio_dtype
105{
106 EIO_DT_UNKNOWN = 0,
107 EIO_DT_FIFO = 1,
108 EIO_DT_CHR = 2,
109 EIO_DT_MPC = 3, /* multiplexed char device (v7+coherent) */
110 EIO_DT_DIR = 4,
111 EIO_DT_NAM = 5, /* xenix special named file */
112 EIO_DT_BLK = 6,
113 EIO_DT_MPB = 7, /* multiplexed block device (v7+coherent) */
114 EIO_DT_REG = 8,
115 EIO_DT_NWK = 9, /* HP-UX network special */
116 EIO_DT_CMP = 9, /* VxFS compressed */
117 EIO_DT_LNK = 10,
118 /* DT_SHAD = 11,*/
119 EIO_DT_SOCK = 12,
120 EIO_DT_DOOR = 13, /* solaris door */
121 EIO_DT_WHT = 14,
122 EIO_DT_MAX = 15 /* highest DT_VALUE ever, hopefully */
123};
124
125struct eio_dirent
126{
127 int nameofs; /* offset of null-terminated name string in (char *)req->ptr2 */
128 unsigned short namelen; /* size of filename without trailing 0 */
129 unsigned char type; /* one of EIO_DT_* */
130 signed char score; /* internal use */
131 eio_ino_t inode; /* the inode number, if available, otherwise unspecified */
132};
133
134/* eio_msync flags */
135enum
136{
137 EIO_MS_ASYNC = 1,
138 EIO_MS_INVALIDATE = 2,
139 EIO_MS_SYNC = 4
140};
141
142/* eio_mtouch flags */
143enum
144{
145 EIO_MT_MODIFY = 1
146};
147
148/* eio_sync_file_range flags */
149enum
150{
151 EIO_SYNC_FILE_RANGE_WAIT_BEFORE = 1,
152 EIO_SYNC_FILE_RANGE_WRITE = 2,
153 EIO_SYNC_FILE_RANGE_WAIT_AFTER = 4
154};
155
156/* eio_fallocate flags */
157enum
158{
159 EIO_FALLOC_FL_KEEP_SIZE = 1 /* MUST match the value in linux/falloc.h */
160};
161
162/* timestamps and differences - feel free to use double in your code directly */
163typedef double eio_tstamp;
164
165/* the eio request structure */
166enum
167{
16 EIO_QUIT, 168 EIO_CUSTOM,
17 EIO_OPEN, EIO_CLOSE, EIO_DUP2, 169 EIO_OPEN, EIO_CLOSE, EIO_DUP2,
18 EIO_READ, EIO_WRITE, 170 EIO_READ, EIO_WRITE,
19 EIO_READAHEAD, EIO_SENDFILE, 171 EIO_READAHEAD, EIO_SENDFILE,
20 EIO_STAT, EIO_LSTAT, EIO_FSTAT, 172 EIO_STAT, EIO_LSTAT, EIO_FSTAT,
173 EIO_STATVFS, EIO_FSTATVFS,
21 EIO_TRUNCATE, EIO_FTRUNCATE, 174 EIO_TRUNCATE, EIO_FTRUNCATE,
22 EIO_UTIME, EIO_FUTIME, 175 EIO_UTIME, EIO_FUTIME,
23 EIO_CHMOD, EIO_FCHMOD, 176 EIO_CHMOD, EIO_FCHMOD,
24 EIO_CHOWN, EIO_FCHOWN, 177 EIO_CHOWN, EIO_FCHOWN,
25 EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, 178 EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC,
179 EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE, EIO_FALLOCATE,
180 EIO_MLOCK, EIO_MLOCKALL,
26 EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, 181 EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME,
27 EIO_MKNOD, EIO_READDIR, 182 EIO_MKNOD, EIO_READDIR,
28 EIO_LINK, EIO_SYMLINK, EIO_READLINK, 183 EIO_LINK, EIO_SYMLINK, EIO_READLINK, EIO_REALPATH,
29 EIO_GROUP, EIO_NOP, 184 EIO_GROUP, EIO_NOP,
30 EIO_BUSY, 185 EIO_BUSY
31}; 186};
32 187
33typedef double eio_tstamp; /* feel free to use double in your code directly */ 188/* mlockall constants */
34
35/* eio request structure */
36/* this structure is mostly read-only */
37struct eio_req
38{
39 eio_req volatile *next; /* private */
40
41 ssize_t result; /* result of syscall, e.g. result = read (... */
42 off_t offs; /* read, write, truncate, readahead: file offset; mknod: dev_t */
43 size_t size; /* read, write, readahead, sendfile: length */
44 void *ptr1; /* all applicable requests: pathname, old name */
45 void *ptr2; /* all applicable requests: new name or memory buffer */
46 eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */
47 eio_tstamp nv2; /* utime, futime: mtime */
48
49 int type; /* EIO_xxx constant */
50 int int1; /* all applicable requests: file descriptor; sendfile: output fd; open: flags */
51 long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode */
52 long int3; /* chown, fchown: gid */
53 int errorno; /* errno value on syscall return */
54
55 unsigned char flags; /* private */
56 unsigned char pri; /* the priority */
57
58 eio_cb finish;
59 void (*destroy)(eio_req *req);
60 void (*feed)(eio_req *req);
61
62 EIO_COMMON;
63
64 eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */
65};
66
67enum { 189enum
68 EIO_FLAG_CANCELLED = 0x01, /* request was cancelled */ 190{
69 EIO_FLAG_PTR1_FREE = 0x02, /* need to free(ptr1) */ 191 EIO_MCL_CURRENT = 1,
70 EIO_FLAG_PTR2_FREE = 0x04 /* need to free(ptr2) */ 192 EIO_MCL_FUTURE = 2,
71}; 193};
194
195/* request priorities */
72 196
73enum { 197enum {
74 EIO_PRI_MIN = -4, 198 EIO_PRI_MIN = -4,
75 EIO_PRI_MAX = 4, 199 EIO_PRI_MAX = 4,
76
77 EIO_DEFAULT_PRI = 0, 200 EIO_PRI_DEFAULT = 0,
78 EIO_PRI_BIAS = -EIO_PRI_MIN,
79 EIO_NUM_PRI = EIO_PRI_MAX + EIO_PRI_BIAS + 1
80}; 201};
202
203/* eio request structure */
204/* this structure is mostly read-only */
205/* when initialising it, all members must be zero-initialised */
206struct eio_req
207{
208 eio_req volatile *next; /* private ETP */
209
210 eio_ssize_t result; /* result of syscall, e.g. result = read (... */
211 off_t offs; /* read, write, truncate, readahead, sync_file_range, fallocate: file offset, mknod: dev_t */
212 size_t size; /* read, write, readahead, sendfile, msync, mlock, sync_file_range, fallocate: length */
213 void *ptr1; /* all applicable requests: pathname, old name; readdir: optional eio_dirents */
214 void *ptr2; /* all applicable requests: new name or memory buffer; readdir: name strings */
215 eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */
216 eio_tstamp nv2; /* utime, futime: mtime */
217
218 int type; /* EIO_xxx constant ETP */
219 int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, mlockall, readdir: flags */
220 long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode, sync_file_range, fallocate: flags */
221 long int3; /* chown, fchown: gid */
222 int errorno; /* errno value on syscall return */
223
224#if __i386 || __amd64
225 unsigned char cancelled;
226#else
227 sig_atomic_t cancelled;
228#endif
229
230 unsigned char flags; /* private */
231 signed char pri; /* the priority */
232
233 void *data;
234 eio_cb finish;
235 void (*destroy)(eio_req *req); /* called when request no longer needed */
236 void (*feed)(eio_req *req); /* only used for group requests */
237
238 EIO_REQ_MEMBERS
239
240 eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */
241};
242
243/* _private_ request flags */
244enum {
245 EIO_FLAG_PTR1_FREE = 0x01, /* need to free(ptr1) */
246 EIO_FLAG_PTR2_FREE = 0x02, /* need to free(ptr2) */
247 EIO_FLAG_GROUPADD = 0x04 /* some request was added to the group */
248};
249
250/* undocumented/unsupported/private helper */
251/*void eio_page_align (void **addr, size_t *length);*/
81 252
82/* returns < 0 on error, errno set 253/* returns < 0 on error, errno set
83 * need_poll, if non-zero, will be called when results are available 254 * need_poll, if non-zero, will be called when results are available
84 * and eio_poll_cb needs to be invoked (it MUST NOT call eio_poll_cb itself). 255 * and eio_poll_cb needs to be invoked (it MUST NOT call eio_poll_cb itself).
85 * done_poll is called when the need to poll is gone. 256 * done_poll is called when the need to poll is gone.
… …
99 * maximum wanted number 270 * maximum wanted number
100 * or maximum idle number of threads */ 271 * or maximum idle number of threads */
101void eio_set_min_parallel (unsigned int nthreads); 272void eio_set_min_parallel (unsigned int nthreads);
102void eio_set_max_parallel (unsigned int nthreads); 273void eio_set_max_parallel (unsigned int nthreads);
103void eio_set_max_idle (unsigned int nthreads); 274void eio_set_max_idle (unsigned int nthreads);
275void eio_set_idle_timeout (unsigned int seconds);
104 276
105unsigned int eio_nreqs (void); /* number of requests in-flight */ 277unsigned int eio_nreqs (void); /* number of requests in-flight */
106unsigned int eio_nready (void); /* number of not-yet handled requests */ 278unsigned int eio_nready (void); /* number of not-yet handled requests */
107unsigned int eio_npending (void); /* numbe rof finished but unhandled requests */ 279unsigned int eio_npending (void); /* number of finished but unhandled requests */
108unsigned int eio_nthreads (void); /* number of worker threads in use currently */ 280unsigned int eio_nthreads (void); /* number of worker threads in use currently */
109 281
110/*****************************************************************************/ 282/*****************************************************************************/
111/* high-level request API */ 283/* convenience wrappers */
112 284
113eio_req *eio_fsync (int fd, eio_cb cb); 285#ifndef EIO_NO_WRAPPERS
114eio_req *eio_fdatasync (int fd, eio_cb cb); 286eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */
115eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb);
116eio_req *eio_read (int fd, off_t offset, size_t length, void *data, eio_cb cb);
117eio_req *eio_write (int fd, off_t offset, size_t length, void *data, eio_cb cb);
118eio_req *eio_fstat (int fd, eio_cb cb); /* stat buffer=ptr2 allocated dynamically */
119eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, eio_cb cb);
120eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb);
121eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb);
122eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb);
123eio_req *eio_dup2 (int fd, int fd2, eio_cb cb);
124eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb);
125eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb);
126eio_req *eio_readlink (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */
127eio_req *eio_stat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocated dynamically */
128eio_req *eio_lstat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocated dynamically */
129eio_req *eio_utime (const char *path, eio_tstamp atime, eio_tstamp mtime, eio_cb cb);
130eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb);
131eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb);
132eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb);
133eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb);
134eio_req *eio_unlink (const char *path, eio_cb cb);
135eio_req *eio_rmdir (const char *path, eio_cb cb);
136eio_req *eio_readdir (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */
137eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb);
138eio_req *eio_busy (eio_tstamp delay, eio_cb cb); /* ties a thread for this long, simulating busyness */ 287eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */
139eio_req *eio_nop (eio_cb cb); /* does nothing except go through the whole process */ 288eio_req *eio_sync (int pri, eio_cb cb, void *data);
289eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data);
290eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data);
291eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data);
292eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data);
293eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data);
294eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data);
295eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data);
296eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data);
297eio_req *eio_close (int fd, int pri, eio_cb cb, void *data);
298eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data);
299eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data);
300eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data);
301eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
302eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
303eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data);
304eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data);
305eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data);
306eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data);
307eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data);
308eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data);
309eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data);
310eio_req *eio_utime (const char *path, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data);
311eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data);
312eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data);
313eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data);
314eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data);
315eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */
316eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data);
317eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data);
318eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */
319eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */
320eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
321eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
322eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
323eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data);
324eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data);
325eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data);
326eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data);
327eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data);
328#endif
140 329
330/*****************************************************************************/
141/* for groups */ 331/* groups */
332
142eio_req *eio_grp (eio_cb cb); 333eio_req *eio_grp (eio_cb cb, void *data);
143void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit); 334void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit);
144void eio_grp_limit (eio_req *grp, int limit); 335void eio_grp_limit (eio_req *grp, int limit);
145void eio_grp_add (eio_req *grp, eio_req *req); 336void eio_grp_add (eio_req *grp, eio_req *req);
146void eio_grp_cancel (eio_req *grp); /* cancels all sub requests but not the group */ 337void eio_grp_cancel (eio_req *grp); /* cancels all sub requests but not the group */
147 338
148/*****************************************************************************/ 339/*****************************************************************************/
149/* low-level request API */ 340/* request api */
150
151/* must be used to initialise eio_req's */
152#define EIO_INIT(req,prio,finish_cb, destroy_cb) \
153 memset ((req), 0, sizeof (eio_req)); \
154 (req)->pri = (prio) + EIO_PRI_BIAS; \
155 (req)->finish = (finish_cb); \
156 (req)->destroy = (destroy_cb)
157 341
158/* true if the request was cancelled, useful in the invoke callback */ 342/* true if the request was cancelled, useful in the invoke callback */
159#define EIO_CANCELLED(req) ((req)->flags & EIO_FLAG_CANCELLED) 343#define EIO_CANCELLED(req) ((req)->cancelled)
344
345#define EIO_RESULT(req) ((req)->result)
346/* returns a pointer to the result buffer allocated by eio */
347#define EIO_BUF(req) ((req)->ptr2)
348#define EIO_STAT_BUF(req) ((EIO_STRUCT_STAT *)EIO_BUF(req))
349#define EIO_STATVFS_BUF(req) ((EIO_STRUCT_STATVFS *)EIO_BUF(req))
350#define EIO_PATH(req) ((char *)(req)->ptr1)
160 351
161/* submit a request for execution */ 352/* submit a request for execution */
162void eio_submit (eio_req *req); 353void eio_submit (eio_req *req);
163/* cancel a request as soon fast as possible */ 354/* cancel a request as soon fast as possible, if possible */
164void eio_cancel (eio_req *req); 355void eio_cancel (eio_req *req);
165/* destroy a request that has never been submitted */
166void eio_destroy (eio_req *req);
167 356
168/*****************************************************************************/ 357/*****************************************************************************/
169/* convinience functions */ 358/* convenience functions */
170 359
171/*ssize_t eio_sendfile (int ofd, int ifd, off_t offset, size_t count)*/ 360eio_ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count);
172 361
362#ifdef __cplusplus
363}
173#endif 364#endif
174 365
366#endif
367

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