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Comparing libeio/eio.h (file contents):
Revision 1.6 by root, Mon May 12 00:31:43 2008 UTC vs.
Revision 1.33 by root, Tue Jul 5 09:24:12 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>
5#include <sys/types.h> 48#include <sys/types.h>
6 49
7typedef struct eio_req eio_req; 50typedef struct eio_req eio_req;
51typedef struct eio_dirent eio_dirent;
8 52
9typedef int (*eio_cb)(eio_req *req); 53typedef int (*eio_cb)(eio_req *req);
10 54
11#ifndef EIO_COMMON 55#ifndef EIO_REQ_MEMBERS
12# define EIO_COMMON void *data 56# define EIO_REQ_MEMBERS
13#endif 57#endif
14 58
15#ifndef EIO_STRUCT_STAT 59#ifndef EIO_STRUCT_STAT
16# define EIO_STRUCT_STAT struct stat 60# define EIO_STRUCT_STAT struct stat
17#endif 61#endif
18 62
63#ifndef EIO_STRUCT_STATVFS
64# define EIO_STRUCT_STATVFS struct statvfs
65#endif
66
67/* for readdir */
68
69/* eio_readdir flags */
19enum { 70enum
71{
72 EIO_READDIR_DENTS = 0x01, /* ptr2 contains eio_dirents, not just the (unsorted) names */
73 EIO_READDIR_DIRS_FIRST = 0x02, /* dirents gets sorted into a good stat() ing order to find directories first */
74 EIO_READDIR_STAT_ORDER = 0x04, /* dirents gets sorted into a good stat() ing order to quickly stat all files */
75 EIO_READDIR_FOUND_UNKNOWN = 0x80, /* set by eio_readdir when *_ARRAY was set and any TYPE=UNKNOWN's were found */
76
77 EIO_READDIR_CUSTOM1 = 0x100, /* for use by apps */
78 EIO_READDIR_CUSTOM2 = 0x200 /* for use by apps */
79};
80
81/* using "typical" values in the hope that the compiler will do something sensible */
82enum eio_dtype
83{
84 EIO_DT_UNKNOWN = 0,
85 EIO_DT_FIFO = 1,
86 EIO_DT_CHR = 2,
87 EIO_DT_MPC = 3, /* multiplexed char device (v7+coherent) */
88 EIO_DT_DIR = 4,
89 EIO_DT_NAM = 5, /* xenix special named file */
90 EIO_DT_BLK = 6,
91 EIO_DT_MPB = 7, /* multiplexed block device (v7+coherent) */
92 EIO_DT_REG = 8,
93 EIO_DT_NWK = 9, /* HP-UX network special */
94 EIO_DT_CMP = 9, /* VxFS compressed */
95 EIO_DT_LNK = 10,
96 /* DT_SHAD = 11,*/
97 EIO_DT_SOCK = 12,
98 EIO_DT_DOOR = 13, /* solaris door */
99 EIO_DT_WHT = 14,
100 EIO_DT_MAX = 15 /* highest DT_VALUE ever, hopefully */
101};
102
103struct eio_dirent
104{
105 int nameofs; /* offset of null-terminated name string in (char *)req->ptr2 */
106 unsigned short namelen; /* size of filename without trailing 0 */
107 unsigned char type; /* one of EIO_DT_* */
108 signed char score; /* internal use */
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
125};
126
127/* eio_sync_file_range flags */
128
129enum
130{
131 EIO_SYNC_FILE_RANGE_WAIT_BEFORE = 1,
132 EIO_SYNC_FILE_RANGE_WRITE = 2,
133 EIO_SYNC_FILE_RANGE_WAIT_AFTER = 4
134};
135
136typedef double eio_tstamp; /* feel free to use double in your code directly */
137
138/* the eio request structure */
139
140enum
141{
20 EIO_QUIT, 142 EIO_CUSTOM,
21 EIO_OPEN, EIO_CLOSE, EIO_DUP2, 143 EIO_OPEN, EIO_CLOSE, EIO_DUP2,
22 EIO_READ, EIO_WRITE, 144 EIO_READ, EIO_WRITE,
23 EIO_READAHEAD, EIO_SENDFILE, 145 EIO_READAHEAD, EIO_SENDFILE,
24 EIO_STAT, EIO_LSTAT, EIO_FSTAT, 146 EIO_STAT, EIO_LSTAT, EIO_FSTAT,
147 EIO_STATVFS, EIO_FSTATVFS,
25 EIO_TRUNCATE, EIO_FTRUNCATE, 148 EIO_TRUNCATE, EIO_FTRUNCATE,
26 EIO_UTIME, EIO_FUTIME, 149 EIO_UTIME, EIO_FUTIME,
27 EIO_CHMOD, EIO_FCHMOD, 150 EIO_CHMOD, EIO_FCHMOD,
28 EIO_CHOWN, EIO_FCHOWN, 151 EIO_CHOWN, EIO_FCHOWN,
29 EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, 152 EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC,
153 EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE,
154 EIO_MLOCK, EIO_MLOCKALL,
30 EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, 155 EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME,
31 EIO_MKNOD, EIO_READDIR, 156 EIO_MKNOD, EIO_READDIR,
32 EIO_LINK, EIO_SYMLINK, EIO_READLINK, 157 EIO_LINK, EIO_SYMLINK, EIO_READLINK, EIO_REALPATH,
33 EIO_GROUP, EIO_NOP, 158 EIO_GROUP, EIO_NOP,
34 EIO_BUSY, 159 EIO_BUSY
35}; 160};
36 161
37typedef double eio_tstamp; /* feel free to use double in your code directly */ 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};
38 176
39/* eio request structure */ 177/* eio request structure */
40/* this structure is mostly read-only */ 178/* this structure is mostly read-only */
179/* when initialising it, all members must be zero-initialised */
41struct eio_req 180struct eio_req
42{ 181{
43 eio_req volatile *next; /* private */ 182 eio_req volatile *next; /* private ETP */
44 183
45 ssize_t result; /* result of syscall, e.g. result = read (... */ 184 ssize_t result; /* result of syscall, e.g. result = read (... */
46 off_t offs; /* read, write, truncate, readahead: file offset; mknod: dev_t */ 185 off_t offs; /* read, write, truncate, readahead, sync_file_range: file offset, mknod: dev_t */
47 size_t size; /* read, write, readahead, sendfile: length */ 186 size_t size; /* read, write, readahead, sendfile, msync, mlock, sync_file_range: length */
48 void *ptr1; /* all applicable requests: pathname, old name */ 187 void *ptr1; /* all applicable requests: pathname, old name; readdir: optional eio_dirents */
49 void *ptr2; /* all applicable requests: new name or memory buffer */ 188 void *ptr2; /* all applicable requests: new name or memory buffer; readdir: name strings */
50 eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ 189 eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */
51 eio_tstamp nv2; /* utime, futime: mtime */ 190 eio_tstamp nv2; /* utime, futime: mtime */
52 191
53 int type; /* EIO_xxx constant */ 192 int type; /* EIO_xxx constant ETP */
54 int int1; /* all applicable requests: file descriptor; sendfile: output fd; open: flags */ 193 int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, mlockall, readdir: flags */
55 long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode */ 194 long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode, sync_file_range: flags */
56 long int3; /* chown, fchown: gid */ 195 long int3; /* chown, fchown: gid */
57 int errorno; /* errno value on syscall return */ 196 int errorno; /* errno value on syscall return */
58 197
59 unsigned char flags; /* private */ 198 unsigned char flags; /* private */
60 unsigned char pri; /* the priority */ 199 signed char pri; /* the priority */
61 200
201 void *data;
62 eio_cb finish; 202 eio_cb finish;
63 void (*destroy)(eio_req *req); 203 void (*destroy)(eio_req *req); /* called when request no longer needed */
64 void (*feed)(eio_req *req); 204 void (*feed)(eio_req *req); /* only used for group requests */
65 205
66 EIO_COMMON; 206 EIO_REQ_MEMBERS
67 207
68 eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ 208 eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */
69}; 209};
70 210
211/* _private_ request flags */
71enum { 212enum {
72 EIO_FLAG_CANCELLED = 0x01, /* request was cancelled */ 213 EIO_FLAG_CANCELLED = 0x01, /* request was cancelled */
73 EIO_FLAG_PTR1_FREE = 0x02, /* need to free(ptr1) */ 214 EIO_FLAG_PTR1_FREE = 0x02, /* need to free(ptr1) */
74 EIO_FLAG_PTR2_FREE = 0x04 /* need to free(ptr2) */ 215 EIO_FLAG_PTR2_FREE = 0x04, /* need to free(ptr2) */
216 EIO_FLAG_GROUPADD = 0x08 /* some request was added to the group */
75}; 217};
76 218
77enum { 219/* undocumented/unsupported/private helper */
78 EIO_PRI_MIN = -4, 220/*void eio_page_align (void **addr, size_t *length);*/
79 EIO_PRI_MAX = 4,
80
81 EIO_DEFAULT_PRI = 0,
82 EIO_PRI_BIAS = -EIO_PRI_MIN,
83 EIO_NUM_PRI = EIO_PRI_MAX + EIO_PRI_BIAS + 1
84};
85 221
86/* returns < 0 on error, errno set 222/* returns < 0 on error, errno set
87 * 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
88 * 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).
89 * done_poll is called when the need to poll is gone. 225 * done_poll is called when the need to poll is gone.
… …
103 * maximum wanted number 239 * maximum wanted number
104 * or maximum idle number of threads */ 240 * or maximum idle number of threads */
105void eio_set_min_parallel (unsigned int nthreads); 241void eio_set_min_parallel (unsigned int nthreads);
106void eio_set_max_parallel (unsigned int nthreads); 242void eio_set_max_parallel (unsigned int nthreads);
107void eio_set_max_idle (unsigned int nthreads); 243void eio_set_max_idle (unsigned int nthreads);
244void eio_set_idle_timeout (unsigned int seconds);
108 245
109unsigned int eio_nreqs (void); /* number of requests in-flight */ 246unsigned int eio_nreqs (void); /* number of requests in-flight */
110unsigned int eio_nready (void); /* number of not-yet handled requests */ 247unsigned int eio_nready (void); /* number of not-yet handled requests */
111unsigned int eio_npending (void); /* numbe rof finished but unhandled requests */ 248unsigned int eio_npending (void); /* numbe rof finished but unhandled requests */
112unsigned int eio_nthreads (void); /* number of worker threads in use currently */ 249unsigned int eio_nthreads (void); /* number of worker threads in use currently */
113 250
114/*****************************************************************************/ 251/*****************************************************************************/
115/* high-level request API */ 252/* convenience wrappers */
116 253
254#ifndef EIO_NO_WRAPPERS
117eio_req *eio_nop (eio_cb cb); /* does nothing except go through the whole process */ 255eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */
118eio_req *eio_busy (eio_tstamp delay, eio_cb cb); /* ties a thread for this long, simulating busyness */ 256eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */
119eio_req *eio_sync (eio_cb cb);
120eio_req *eio_fsync (int fd, eio_cb cb); 257eio_req *eio_sync (int pri, eio_cb cb, void *data);
258eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data);
121eio_req *eio_fdatasync (int fd, eio_cb cb); 259eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data);
260eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data);
261eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data);
262eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data);
263eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data);
264eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data);
122eio_req *eio_close (int fd, eio_cb cb); 265eio_req *eio_close (int fd, int pri, eio_cb cb, void *data);
123eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb); 266eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data);
124eio_req *eio_read (int fd, void *data, size_t length, off_t offset, eio_cb cb); 267eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data);
125eio_req *eio_write (int fd, void *data, size_t length, off_t offset, eio_cb cb); 268eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data);
126eio_req *eio_fstat (int fd, eio_cb cb); /* stat buffer=ptr2 allocated dynamically */ 269eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
270eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
127eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, eio_cb cb); 271eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data);
128eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb); 272eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data);
129eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb); 273eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data);
130eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb); 274eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data);
131eio_req *eio_dup2 (int fd, int fd2, eio_cb cb); 275eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data);
132eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb); 276eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data);
133eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb); 277eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data);
134eio_req *eio_utime (const char *path, eio_tstamp atime, eio_tstamp mtime, eio_cb cb); 278eio_req *eio_utime (const char *path, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data);
135eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb); 279eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data);
136eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb); 280eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data);
137eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb); 281eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data);
138eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb); 282eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data);
139eio_req *eio_readdir (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */ 283eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */
140eio_req *eio_rmdir (const char *path, eio_cb cb); 284eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data);
141eio_req *eio_unlink (const char *path, eio_cb cb); 285eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data);
142eio_req *eio_readlink (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */ 286eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */
287eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */
143eio_req *eio_stat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocated dynamically */ 288eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
144eio_req *eio_lstat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocated dynamically */ 289eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
290eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
145eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb); 291eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data);
146eio_req *eio_link (const char *path, const char *new_path, eio_cb cb); 292eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data);
147eio_req *eio_symlink (const char *path, const char *new_path, eio_cb cb); 293eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data);
148eio_req *eio_rename (const char *path, const char *new_path, eio_cb cb); 294eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data);
295eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data);
296#endif
149 297
298/*****************************************************************************/
150/* for groups */ 299/* groups */
300
151eio_req *eio_grp (eio_cb cb); 301eio_req *eio_grp (eio_cb cb, void *data);
152void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit); 302void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit);
153void eio_grp_limit (eio_req *grp, int limit); 303void eio_grp_limit (eio_req *grp, int limit);
154void eio_grp_add (eio_req *grp, eio_req *req); 304void eio_grp_add (eio_req *grp, eio_req *req);
155void eio_grp_cancel (eio_req *grp); /* cancels all sub requests but not the group */ 305void eio_grp_cancel (eio_req *grp); /* cancels all sub requests but not the group */
156 306
307/*****************************************************************************/
308/* request api */
309
310/* true if the request was cancelled, useful in the invoke callback */
311#define EIO_CANCELLED(req) ((req)->flags & EIO_FLAG_CANCELLED)
312
313#define EIO_RESULT(req) ((req)->result)
314/* returns a pointer to the result buffer allocated by eio */
315#define EIO_BUF(req) ((req)->ptr2)
316#define EIO_STAT_BUF(req) ((EIO_STRUCT_STAT *)EIO_BUF(req))
317#define EIO_STATVFS_BUF(req) ((EIO_STRUCT_STATVFS *)EIO_BUF(req))
318#define EIO_PATH(req) ((char *)(req)->ptr1)
319
320/* submit a request for execution */
321void eio_submit (eio_req *req);
157/* cancel a request as soon fast as possible */ 322/* cancel a request as soon fast as possible, if possible */
158void eio_cancel (eio_req *req); 323void eio_cancel (eio_req *req);
159/* destroy a request that has never been submitted */ 324/* destroy a request that has never been submitted */
160void eio_destroy (eio_req *req); 325void eio_destroy (eio_req *req);
161 326
162/* true if the request was cancelled, useful in the invoke callback */
163#define EIO_CANCELLED(req) ((req)->flags & EIO_FLAG_CANCELLED)
164
165#define EIO_RESULT(req) ((req)->result)
166/* returns a pointer to the result buffer allocated by eio */
167#define EIO_BUF(req) ((req)->ptr2)
168#define EIO_STAT_BUF(req) ((EIO_STRUCT_STAT *)EIO_BUF(req))
169#define EIO_PATH(req) ((char *)(req)->ptr1)
170
171/*****************************************************************************/
172/* low-level request API */
173
174/* must be used to initialise eio_req's */
175#define EIO_INIT(req,prio,finish_cb, destroy_cb) \
176 memset ((req), 0, sizeof (eio_req)); \
177 (req)->pri = (prio) + EIO_PRI_BIAS; \
178 (req)->finish = (finish_cb); \
179 (req)->destroy = (destroy_cb)
180
181/* submit a request for execution */
182void eio_submit (eio_req *req);
183
184/*****************************************************************************/ 327/*****************************************************************************/
185/* convinience functions */ 328/* convinience functions */
186 329
187ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count); 330ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count);
188 331
332#ifdef __cplusplus
333}
189#endif 334#endif
190 335
336#endif
337

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