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Comparing libeio/eio.h (file contents):
Revision 1.20 by root, Sat Jun 6 18:06:55 2009 UTC vs.
Revision 1.35 by root, Tue Jul 5 20:34:42 2011 UTC

1/* 1/*
2 * libeio API header 2 * libeio API header
3 * 3 *
4 * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libeio@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011 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 *
… …
43#ifdef __cplusplus 43#ifdef __cplusplus
44extern "C" { 44extern "C" {
45#endif 45#endif
46 46
47#include <stddef.h> 47#include <stddef.h>
48#include <signal.h>
48#include <sys/types.h> 49#include <sys/types.h>
49 50
50typedef struct eio_req eio_req; 51typedef struct eio_req eio_req;
51typedef struct eio_dirent eio_dirent; 52typedef struct eio_dirent eio_dirent;
52 53
… …
58 59
59#ifndef EIO_STRUCT_STAT 60#ifndef EIO_STRUCT_STAT
60# define EIO_STRUCT_STAT struct stat 61# define EIO_STRUCT_STAT struct stat
61#endif 62#endif
62 63
64#ifndef EIO_STRUCT_STATVFS
65# define EIO_STRUCT_STATVFS struct statvfs
66#endif
67
63/* for readdir */ 68/* for readdir */
64 69
65/* eio_readdir flags */ 70/* eio_readdir flags */
66enum { 71enum
72{
67 EIO_READDIR_DENTS = 0x01, /* ptr2 contains eio_dirents, not just the (unsorted) names */ 73 EIO_READDIR_DENTS = 0x01, /* ptr2 contains eio_dirents, not just the (unsorted) names */
68 EIO_READDIR_DIRS_FIRST = 0x02, /* dirents gets sorted into a good stat() ing order to find directories first */ 74 EIO_READDIR_DIRS_FIRST = 0x02, /* dirents gets sorted into a good stat() ing order to find directories first */
69 EIO_READDIR_STAT_ORDER = 0x04, /* dirents gets sorted into a good stat() ing order to quickly stat all files */ 75 EIO_READDIR_STAT_ORDER = 0x04, /* dirents gets sorted into a good stat() ing order to quickly stat all files */
70 EIO_READDIR_FOUND_UNKNOWN = 0x80, /* set by eio_readdir when *_ARRAY was set and any TYPE=UNKNOWN's were found */ 76 EIO_READDIR_FOUND_UNKNOWN = 0x80, /* set by eio_readdir when *_ARRAY was set and any TYPE=UNKNOWN's were found */
71 77
72 EIO_READDIR_CUSTOM1 = 0x100, /* for use by apps */ 78 EIO_READDIR_CUSTOM1 = 0x100, /* for use by apps */
73 EIO_READDIR_CUSTOM2 = 0x200 /* for use by apps */ 79 EIO_READDIR_CUSTOM2 = 0x200 /* for use by apps */
74}; 80};
75 81
76/* using "typical" values in the hope that the compiler will do something sensible */ 82/* using "typical" values in the hope that the compiler will do something sensible */
77enum eio_dtype { 83enum eio_dtype
84{
78 EIO_DT_UNKNOWN = 0, 85 EIO_DT_UNKNOWN = 0,
79 EIO_DT_FIFO = 1, 86 EIO_DT_FIFO = 1,
80 EIO_DT_CHR = 2, 87 EIO_DT_CHR = 2,
88 EIO_DT_MPC = 3, /* multiplexed char device (v7+coherent) */
81 EIO_DT_DIR = 4, 89 EIO_DT_DIR = 4,
90 EIO_DT_NAM = 5, /* xenix special named file */
82 EIO_DT_BLK = 6, 91 EIO_DT_BLK = 6,
92 EIO_DT_MPB = 7, /* multiplexed block device (v7+coherent) */
83 EIO_DT_REG = 8, 93 EIO_DT_REG = 8,
94 EIO_DT_NWK = 9, /* HP-UX network special */
95 EIO_DT_CMP = 9, /* VxFS compressed */
84 EIO_DT_LNK = 10, 96 EIO_DT_LNK = 10,
97 /* DT_SHAD = 11,*/
85 EIO_DT_SOCK = 12, 98 EIO_DT_SOCK = 12,
99 EIO_DT_DOOR = 13, /* solaris door */
86 EIO_DT_WHT = 14, 100 EIO_DT_WHT = 14,
87 EIO_DT_MAX = 15 /* highest DT_VALUE ever, hopefully */ 101 EIO_DT_MAX = 15 /* highest DT_VALUE ever, hopefully */
88}; 102};
89 103
90struct eio_dirent { 104struct eio_dirent
91 char *name; 105{
92 ino_t inode; 106 int nameofs; /* offset of null-terminated name string in (char *)req->ptr2 */
93 unsigned short namelen; 107 unsigned short namelen; /* size of filename without trailing 0 */
94 unsigned char type; 108 unsigned char type; /* one of EIO_DT_* */
95 unsigned char score; /* internal use */ 109 signed char score; /* internal use */
96 /* 0-4 bytes padding */ 110 ino_t inode; /* the inode number, if available, otherwise unspecified */
111};
112
113/* eio_msync flags */
114enum
115{
116 EIO_MS_ASYNC = 1,
117 EIO_MS_INVALIDATE = 2,
118 EIO_MS_SYNC = 4
119};
120
121/* eio_mtouch flags */
122
123enum
124{
125 EIO_MT_MODIFY = 1
97}; 126};
98 127
99/* eio_sync_file_range flags */ 128/* eio_sync_file_range flags */
100 129
101enum { 130enum
131{
102 EIO_SYNC_FILE_RANGE_WAIT_BEFORE = 1, 132 EIO_SYNC_FILE_RANGE_WAIT_BEFORE = 1,
103 EIO_SYNC_FILE_RANGE_WRITE = 2, 133 EIO_SYNC_FILE_RANGE_WRITE = 2,
104 EIO_SYNC_FILE_RANGE_WAIT_AFTER = 4 134 EIO_SYNC_FILE_RANGE_WAIT_AFTER = 4
105}; 135};
106 136
107typedef double eio_tstamp; /* feel free to use double in your code directly */ 137typedef double eio_tstamp; /* feel free to use double in your code directly */
108 138
109/* the eio request structure */ 139/* the eio request structure */
110 140
111enum { 141enum
142{
112 EIO_CUSTOM, 143 EIO_CUSTOM,
113 EIO_OPEN, EIO_CLOSE, EIO_DUP2, 144 EIO_OPEN, EIO_CLOSE, EIO_DUP2,
114 EIO_READ, EIO_WRITE, 145 EIO_READ, EIO_WRITE,
115 EIO_READAHEAD, EIO_SENDFILE, 146 EIO_READAHEAD, EIO_SENDFILE,
116 EIO_STAT, EIO_LSTAT, EIO_FSTAT, 147 EIO_STAT, EIO_LSTAT, EIO_FSTAT,
148 EIO_STATVFS, EIO_FSTATVFS,
117 EIO_TRUNCATE, EIO_FTRUNCATE, 149 EIO_TRUNCATE, EIO_FTRUNCATE,
118 EIO_UTIME, EIO_FUTIME, 150 EIO_UTIME, EIO_FUTIME,
119 EIO_CHMOD, EIO_FCHMOD, 151 EIO_CHMOD, EIO_FCHMOD,
120 EIO_CHOWN, EIO_FCHOWN, 152 EIO_CHOWN, EIO_FCHOWN,
121 EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, 153 EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC,
122 EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE, 154 EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE,
155 EIO_MLOCK, EIO_MLOCKALL,
123 EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, 156 EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME,
124 EIO_MKNOD, EIO_READDIR, 157 EIO_MKNOD, EIO_READDIR,
125 EIO_LINK, EIO_SYMLINK, EIO_READLINK, 158 EIO_LINK, EIO_SYMLINK, EIO_READLINK, EIO_REALPATH,
126 EIO_GROUP, EIO_NOP, 159 EIO_GROUP, EIO_NOP,
127 EIO_BUSY 160 EIO_BUSY
161};
162
163/* mlockall constants */
164enum
165{
166 EIO_MCL_CURRENT = 1,
167 EIO_MCL_FUTURE = 2,
168};
169
170/* request priorities */
171
172enum {
173 EIO_PRI_MIN = -4,
174 EIO_PRI_MAX = 4,
175 EIO_PRI_DEFAULT = 0,
128}; 176};
129 177
130/* eio request structure */ 178/* eio request structure */
131/* this structure is mostly read-only */ 179/* this structure is mostly read-only */
132/* when initialising it, all members must be zero-initialised */ 180/* when initialising it, all members must be zero-initialised */
133struct eio_req 181struct eio_req
134{ 182{
135 eio_req volatile *next; /* private ETP */ 183 eio_req volatile *next; /* private ETP */
136 184
137 ssize_t result; /* result of syscall, e.g. result = read (... */ 185 ssize_t result; /* result of syscall, e.g. result = read (... */
138 off_t offs; /* read, write, truncate, readahead, sync_file_range: file offset */ 186 off_t offs; /* read, write, truncate, readahead, sync_file_range: file offset, mknod: dev_t */
139 size_t size; /* read, write, readahead, sendfile, msync, sync_file_range: length */ 187 size_t size; /* read, write, readahead, sendfile, msync, mlock, sync_file_range: length */
140 void *ptr1; /* all applicable requests: pathname, old name; readdir: possible output memory buffer */ 188 void *ptr1; /* all applicable requests: pathname, old name; readdir: optional eio_dirents */
141 void *ptr2; /* all applicable requests: new name or memory buffer */ 189 void *ptr2; /* all applicable requests: new name or memory buffer; readdir: name strings */
142 eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ 190 eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */
143 eio_tstamp nv2; /* utime, futime: mtime */ 191 eio_tstamp nv2; /* utime, futime: mtime */
144 192
145 int type; /* EIO_xxx constant ETP */ 193 int type; /* EIO_xxx constant ETP */
146 int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, readdir: flags */ 194 int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, mlockall, readdir: flags */
147 long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode, sync_file_range: flags */ 195 long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode, sync_file_range: flags */
148 long int3; /* chown, fchown: gid; mknod: dev_t */ 196 long int3; /* chown, fchown: gid */
149 int errorno; /* errno value on syscall return */ 197 int errorno; /* errno value on syscall return */
198
199#if __i386 || __amd64
200 unsigned char cancelled;
201#else
202 sig_atomic_t cancelled;
203#endif
150 204
151 unsigned char flags; /* private */ 205 unsigned char flags; /* private */
152 signed char pri; /* the priority */ 206 signed char pri; /* the priority */
153 207
154 void *data; 208 void *data;
155 eio_cb finish; 209 eio_cb finish;
156 void (*destroy)(eio_req *req); /* called when requets no longer needed */ 210 void (*destroy)(eio_req *req); /* called when request no longer needed */
157 void (*feed)(eio_req *req); /* only used for group requests */ 211 void (*feed)(eio_req *req); /* only used for group requests */
158 212
159 EIO_REQ_MEMBERS 213 EIO_REQ_MEMBERS
160 214
161 eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ 215 eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */
162}; 216};
163 217
164/* _private_ flags */ 218/* _private_ request flags */
165enum { 219enum {
166 EIO_FLAG_CANCELLED = 0x01, /* request was cancelled */
167 EIO_FLAG_PTR1_FREE = 0x02, /* need to free(ptr1) */ 220 EIO_FLAG_PTR1_FREE = 0x01, /* need to free(ptr1) */
168 EIO_FLAG_PTR2_FREE = 0x04, /* need to free(ptr2) */ 221 EIO_FLAG_PTR2_FREE = 0x02, /* need to free(ptr2) */
169 EIO_FLAG_GROUPADD = 0x08 /* some request was added to the group */ 222 EIO_FLAG_GROUPADD = 0x04 /* some request was added to the group */
170}; 223};
171 224
172enum { 225/* undocumented/unsupported/private helper */
173 EIO_PRI_MIN = -4, 226/*void eio_page_align (void **addr, size_t *length);*/
174 EIO_PRI_MAX = 4,
175 EIO_PRI_DEFAULT = 0,
176};
177 227
178/* returns < 0 on error, errno set 228/* returns < 0 on error, errno set
179 * need_poll, if non-zero, will be called when results are available 229 * need_poll, if non-zero, will be called when results are available
180 * and eio_poll_cb needs to be invoked (it MUST NOT call eio_poll_cb itself). 230 * and eio_poll_cb needs to be invoked (it MUST NOT call eio_poll_cb itself).
181 * done_poll is called when the need to poll is gone. 231 * done_poll is called when the need to poll is gone.
… …
195 * maximum wanted number 245 * maximum wanted number
196 * or maximum idle number of threads */ 246 * or maximum idle number of threads */
197void eio_set_min_parallel (unsigned int nthreads); 247void eio_set_min_parallel (unsigned int nthreads);
198void eio_set_max_parallel (unsigned int nthreads); 248void eio_set_max_parallel (unsigned int nthreads);
199void eio_set_max_idle (unsigned int nthreads); 249void eio_set_max_idle (unsigned int nthreads);
250void eio_set_idle_timeout (unsigned int seconds);
200 251
201unsigned int eio_nreqs (void); /* number of requests in-flight */ 252unsigned int eio_nreqs (void); /* number of requests in-flight */
202unsigned int eio_nready (void); /* number of not-yet handled requests */ 253unsigned int eio_nready (void); /* number of not-yet handled requests */
203unsigned int eio_npending (void); /* numbe rof finished but unhandled requests */ 254unsigned int eio_npending (void); /* numbe rof finished but unhandled requests */
204unsigned int eio_nthreads (void); /* number of worker threads in use currently */ 255unsigned int eio_nthreads (void); /* number of worker threads in use currently */
205 256
206/*****************************************************************************/ 257/*****************************************************************************/
207/* convinience wrappers */ 258/* convenience wrappers */
208 259
209#ifndef EIO_NO_WRAPPERS 260#ifndef EIO_NO_WRAPPERS
210eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ 261eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */
211eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */ 262eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */
212eio_req *eio_sync (int pri, eio_cb cb, void *data); 263eio_req *eio_sync (int pri, eio_cb cb, void *data);
213eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data); 264eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data);
214eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data); 265eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data);
215eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); 266eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data);
216eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); 267eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data);
268eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data);
269eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data);
217eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data); 270eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data);
218eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); 271eio_req *eio_close (int fd, int pri, eio_cb cb, void *data);
219eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); 272eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data);
220eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); 273eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data);
221eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); 274eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data);
222eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ 275eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
276eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
223eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); 277eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data);
224eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data); 278eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data);
225eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data); 279eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data);
226eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data); 280eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data);
227eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data); 281eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data);
… …
234eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data); 288eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data);
235eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ 289eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */
236eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data); 290eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data);
237eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data); 291eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data);
238eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ 292eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */
293eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */
239eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ 294eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
240eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ 295eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
296eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
241eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data); 297eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data);
242eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data); 298eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data);
243eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data); 299eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data);
244eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data); 300eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data);
245eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data); 301eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data);
246#endif 302#endif
247 303
248/*****************************************************************************/ 304/*****************************************************************************/
249/* groups */ 305/* groups */
250 306
… …
256 312
257/*****************************************************************************/ 313/*****************************************************************************/
258/* request api */ 314/* request api */
259 315
260/* true if the request was cancelled, useful in the invoke callback */ 316/* true if the request was cancelled, useful in the invoke callback */
261#define EIO_CANCELLED(req) ((req)->flags & EIO_FLAG_CANCELLED) 317#define EIO_CANCELLED(req) ((req)->cancelled)
262 318
263#define EIO_RESULT(req) ((req)->result) 319#define EIO_RESULT(req) ((req)->result)
264/* returns a pointer to the result buffer allocated by eio */ 320/* returns a pointer to the result buffer allocated by eio */
265#define EIO_BUF(req) ((req)->ptr2) 321#define EIO_BUF(req) ((req)->ptr2)
266#define EIO_STAT_BUF(req) ((EIO_STRUCT_STAT *)EIO_BUF(req)) 322#define EIO_STAT_BUF(req) ((EIO_STRUCT_STAT *)EIO_BUF(req))
323#define EIO_STATVFS_BUF(req) ((EIO_STRUCT_STATVFS *)EIO_BUF(req))
267#define EIO_PATH(req) ((char *)(req)->ptr1) 324#define EIO_PATH(req) ((char *)(req)->ptr1)
268 325
269/* submit a request for execution */ 326/* submit a request for execution */
270void eio_submit (eio_req *req); 327void eio_submit (eio_req *req);
271/* cancel a request as soon fast as possible, if possible */ 328/* cancel a request as soon fast as possible, if possible */
272void eio_cancel (eio_req *req); 329void eio_cancel (eio_req *req);
273/* destroy a request that has never been submitted */
274void eio_destroy (eio_req *req);
275 330
276/*****************************************************************************/ 331/*****************************************************************************/
277/* convinience functions */ 332/* convenience functions */
278 333
279ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count); 334ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count);
280 335
281#ifdef __cplusplus 336#ifdef __cplusplus
282} 337}

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