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Comparing libeio/eio.c (file contents):
Revision 1.8 by root, Sun May 11 20:08:37 2008 UTC vs.
Revision 1.132 by root, Sun Sep 7 14:50:00 2014 UTC

1/*
2 * libeio implementation
3 *
4 * Copyright (c) 2007,2008,2009,2010,2011,2012,2013 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
40#ifndef _WIN32
41# include "config.h"
42#endif
43
1#include "eio.h" 44#include "eio.h"
45#include "ecb.h"
46
47#ifdef EIO_STACKSIZE
48# define X_STACKSIZE EIO_STACKSIZE
49#endif
2#include "xthread.h" 50#include "xthread.h"
3 51
4#include <errno.h> 52#include <errno.h>
5#include <stddef.h> 53#include <stddef.h>
6#include <stdlib.h> 54#include <stdlib.h>
… …
10#include <sys/stat.h> 58#include <sys/stat.h>
11#include <limits.h> 59#include <limits.h>
12#include <fcntl.h> 60#include <fcntl.h>
13#include <assert.h> 61#include <assert.h>
14 62
63/* intptr_t comes from unistd.h, says POSIX/UNIX/tradition */
64/* intptr_t only comes from stdint.h, says idiot openbsd coder */
65#if HAVE_STDINT_H
66# include <stdint.h>
67#endif
68
69#ifndef ECANCELED
70# define ECANCELED EDOM
71#endif
72#ifndef ELOOP
73# define ELOOP EDOM
74#endif
75
76#if !defined(ENOTSOCK) && defined(WSAENOTSOCK)
77# define ENOTSOCK WSAENOTSOCK
78#endif
79
80static void eio_destroy (eio_req *req);
81
15#ifndef EIO_FINISH 82#ifndef EIO_FINISH
16# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0 83# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
17#endif 84#endif
18 85
19#ifndef EIO_DESTROY 86#ifndef EIO_DESTROY
… …
22 89
23#ifndef EIO_FEED 90#ifndef EIO_FEED
24# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0) 91# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)
25#endif 92#endif
26 93
94#ifndef EIO_FD_TO_WIN32_HANDLE
95# define EIO_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
96#endif
97#ifndef EIO_WIN32_HANDLE_TO_FD
98# define EIO_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
99#endif
100
101#define EIO_ERRNO(errval,retval) ((errno = errval), retval)
102
103#define EIO_ENOSYS() EIO_ERRNO (ENOSYS, -1)
104
27#ifdef _WIN32 105#ifdef _WIN32
28 106
29 /*doh*/ 107 #undef PAGESIZE
108 #define PAGESIZE 4096 /* GetSystemInfo? */
109
110 /* TODO: look at how perl does stat (non-sloppy), unlink (ro-files), utime, link */
111
112 #ifdef EIO_STRUCT_STATI64
113 /* look at perl's non-sloppy stat */
114 #define stat(path,buf) _stati64 (path,buf)
115 #define fstat(fd,buf) _fstati64 (fd,buf)
116 #endif
117 #define lstat(path,buf) stat (path,buf)
118 #define fsync(fd) (FlushFileBuffers ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1))
119 #define mkdir(path,mode) _mkdir (path)
120 #define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))
121
122 #define chmod(path,mode) _chmod (path, mode)
123 #define dup(fd) _dup (fd)
124 #define dup2(fd1,fd2) _dup2 (fd1, fd2)
125
126 #define fchmod(fd,mode) EIO_ENOSYS ()
127 #define chown(path,uid,gid) EIO_ENOSYS ()
128 #define fchown(fd,uid,gid) EIO_ENOSYS ()
129 #define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
130 #define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */
131 #define mknod(path,mode,dev) EIO_ENOSYS ()
132 #define sync() EIO_ENOSYS ()
133 #define readlink(path,buf,s) EIO_ENOSYS ()
134 #define statvfs(path,buf) EIO_ENOSYS ()
135 #define fstatvfs(fd,buf) EIO_ENOSYS ()
136
137 #define pread(fd,buf,count,offset) eio__pread (fd, buf, count, offset)
138 #define pwrite(fd,buf,count,offset) eio__pwrite (fd, buf, count, offset)
139
140 #if __GNUC__
141 typedef long long eio_off_t; /* signed for compatibility to msvc */
142 #else
143 typedef __int64 eio_off_t; /* unsigned not supported by msvc */
144 #endif
145
146 static eio_ssize_t
147 eio__pread (int fd, void *buf, eio_ssize_t count, eio_off_t offset)
148 {
149 OVERLAPPED o = { 0 };
150 DWORD got;
151
152 o.Offset = offset;
153 o.OffsetHigh = offset >> 32;
154
155 return ReadFile ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd), buf, count, &got, &o)
156 ? got : -1;
157 }
158
159 static eio_ssize_t
160 eio__pwrite (int fd, void *buf, eio_ssize_t count, eio_off_t offset)
161 {
162 OVERLAPPED o = { 0 };
163 DWORD got;
164
165 o.Offset = offset;
166 o.OffsetHigh = offset >> 32;
167
168 return WriteFile ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd), buf, count, &got, &o)
169 ? got : -1;
170 }
171
172 /* rename() uses MoveFile, which fails to overwrite */
173 #define rename(old,neu) eio__rename (old, neu)
174
175 static int
176 eio__rename (const char *old, const char *neu)
177 {
178 if (MoveFileEx (old, neu, MOVEFILE_REPLACE_EXISTING))
179 return 0;
180
181 /* should steal _dosmaperr */
182 switch (GetLastError ())
183 {
184 case ERROR_FILE_NOT_FOUND:
185 case ERROR_PATH_NOT_FOUND:
186 case ERROR_INVALID_DRIVE:
187 case ERROR_NO_MORE_FILES:
188 case ERROR_BAD_NETPATH:
189 case ERROR_BAD_NET_NAME:
190 case ERROR_BAD_PATHNAME:
191 case ERROR_FILENAME_EXCED_RANGE:
192 errno = ENOENT;
193 break;
194
195 default:
196 errno = EACCES;
197 break;
198 }
199
200 return -1;
201 }
202
203 /* we could even stat and see if it exists */
204 static int
205 symlink (const char *old, const char *neu)
206 {
207 #if WINVER >= 0x0600
208 if (CreateSymbolicLink (neu, old, 1))
209 return 0;
210
211 if (CreateSymbolicLink (neu, old, 0))
212 return 0;
213 #endif
214
215 return EIO_ERRNO (ENOENT, -1);
216 }
217
218 /* POSIX API only, causing trouble for win32 apps */
219 #define CreateHardLink(neu,old,flags) 0 /* not really creating hardlink, still using relative paths? */
220 #define CreateSymbolicLink(neu,old,flags) 0 /* vista+ only */
221
222 struct statvfs
223 {
224 int dummy;
225 };
226
227 #define DT_DIR EIO_DT_DIR
228 #define DT_REG EIO_DT_REG
229 #define D_NAME(entp) entp.cFileName
230 #define D_TYPE(entp) (entp.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ? DT_DIR : DT_REG)
30 231
31#else 232#else
32 233
33# include "config.h"
34# include <sys/time.h> 234 #include <sys/time.h>
35# include <sys/select.h> 235 #include <sys/select.h>
36# include <unistd.h> 236 #include <unistd.h>
237 #include <signal.h>
238 #include <dirent.h>
239
240 #ifdef ANDROID
241 #include <sys/vfs.h>
242 #define statvfs statfs
243 #define fstatvfs fstatfs
244 #include <asm/page.h> /* supposedly limits.h does #define PAGESIZE PAGESIZE */
245 #else
246 #include <sys/statvfs.h>
247 #endif
248
249 #if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
250 #include <sys/mman.h>
251 #endif
252
253 #define D_NAME(entp) entp->d_name
254
255 /* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
256 #if __FreeBSD__ || __NetBSD__ || __OpenBSD__
257 #define _DIRENT_HAVE_D_TYPE /* sigh */
258 #define D_INO(de) (de)->d_fileno
259 #define D_NAMLEN(de) (de)->d_namlen
260 #elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
261 #define D_INO(de) (de)->d_ino
262 #endif
263
264 #ifdef _D_EXACT_NAMLEN
265 #undef D_NAMLEN
266 #define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
267 #endif
268
269 #ifdef _DIRENT_HAVE_D_TYPE
270 #define D_TYPE(de) (de)->d_type
271 #endif
272
273 #ifndef EIO_STRUCT_DIRENT
274 #define EIO_STRUCT_DIRENT struct dirent
275 #endif
276
277#endif
278
279#if HAVE_UTIMES
37# include <utime.h> 280# include <utime.h>
38# include <signal.h>
39# include <dirent.h>
40
41# ifndef EIO_STRUCT_DIRENT
42# define EIO_STRUCT_DIRENT struct dirent
43# endif 281#endif
44 282
45#endif 283#if HAVE_SYS_SYSCALL_H
46 284# include <sys/syscall.h>
47# ifndef EIO_STRUCT_STAT
48# define EIO_STRUCT_STAT struct stat
49# endif 285#endif
286
287#if HAVE_SYS_PRCTL_H
288# include <sys/prctl.h>
289#endif
50 290
51#if HAVE_SENDFILE 291#if HAVE_SENDFILE
52# if __linux 292# if __linux
53# include <sys/sendfile.h> 293# include <sys/sendfile.h>
54# elif __freebsd 294# elif __FreeBSD__ || defined __APPLE__
55# include <sys/socket.h> 295# include <sys/socket.h>
56# include <sys/uio.h> 296# include <sys/uio.h>
57# elif __hpux 297# elif __hpux
58# include <sys/socket.h> 298# include <sys/socket.h>
59# elif __solaris /* not yet */ 299# elif __solaris
60# include <sys/sendfile.h> 300# include <sys/sendfile.h>
61# else 301# else
62# error sendfile support requested but not available 302# error sendfile support requested but not available
63# endif 303# endif
64#endif 304#endif
65 305
66/* number of seconds after which an idle threads exit */ 306#ifndef D_TYPE
67#define IDLE_TIMEOUT 10 307# define D_TYPE(de) 0
308#endif
309#ifndef D_INO
310# define D_INO(de) 0
311#endif
312#ifndef D_NAMLEN
313# define D_NAMLEN(entp) strlen (D_NAME (entp))
314#endif
68 315
69/* used for struct dirent, AIX doesn't provide it */ 316/* used for struct dirent, AIX doesn't provide it */
70#ifndef NAME_MAX 317#ifndef NAME_MAX
71# define NAME_MAX 4096 318# define NAME_MAX 4096
72#endif 319#endif
73 320
321/* used for readlink etc. */
322#ifndef PATH_MAX
323# define PATH_MAX 4096
324#endif
325
74/* buffer size for various temporary buffers */ 326/* buffer size for various temporary buffers */
75#define EIO_BUFSIZE 65536 327#define EIO_BUFSIZE 65536
76 328
77#define dBUF \ 329#define dBUF \
78 char *eio_buf; \
79 X_LOCK (wrklock); \
80 self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \ 330 char *eio_buf = malloc (EIO_BUFSIZE); \
81 X_UNLOCK (wrklock); \ 331 errno = ENOMEM; \
82 if (!eio_buf) \ 332 if (!eio_buf) \
83 return -1; 333 return -1
84 334
85#define EIO_TICKS ((1000000 + 1023) >> 10) 335#define FUBd \
336 free (eio_buf)
86 337
87static void (*want_poll_cb) (void); 338/*****************************************************************************/
88static void (*done_poll_cb) (void);
89 339
90static unsigned int max_poll_time = 0; 340struct tmpbuf
91static unsigned int max_poll_reqs = 0;
92
93/* calculcate time difference in ~1/EIO_TICKS of a second */
94static int tvdiff (struct timeval *tv1, struct timeval *tv2)
95{ 341{
96 return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS 342 void *ptr;
97 + ((tv2->tv_usec - tv1->tv_usec) >> 10); 343 int len;
98} 344};
99 345
100static unsigned int started, idle, wanted; 346static void *
101 347tmpbuf_get (struct tmpbuf *buf, int len)
102/* worker threads management */
103static mutex_t wrklock = X_MUTEX_INIT;
104
105typedef struct worker {
106 /* locked by wrklock */
107 struct worker *prev, *next;
108
109 thread_t tid;
110
111 /* locked by reslock, reqlock or wrklock */
112 eio_req *req; /* currently processed request */
113 void *dbuf;
114 DIR *dirp;
115} worker;
116
117static worker wrk_first = { &wrk_first, &wrk_first, 0 };
118
119static void worker_clear (worker *wrk)
120{ 348{
121 if (wrk->dirp) 349 if (buf->len < len)
122 { 350 {
123 closedir (wrk->dirp); 351 free (buf->ptr);
124 wrk->dirp = 0; 352 buf->ptr = malloc (buf->len = len);
125 } 353 }
126 354
127 if (wrk->dbuf) 355 return buf->ptr;
128 {
129 free (wrk->dbuf);
130 wrk->dbuf = 0;
131 }
132} 356}
133 357
134static void worker_free (worker *wrk) 358struct tmpbuf;
135{
136 wrk->next->prev = wrk->prev;
137 wrk->prev->next = wrk->next;
138 359
139 free (wrk); 360#if _POSIX_VERSION >= 200809L
140} 361 #define HAVE_AT 1
362 #define WD2FD(wd) ((wd) ? (wd)->fd : AT_FDCWD)
363 #ifndef O_SEARCH
364 #define O_SEARCH O_RDONLY
365 #endif
366#else
367 #define HAVE_AT 0
368 static const char *wd_expand (struct tmpbuf *tmpbuf, eio_wd wd, const char *path);
369#endif
141 370
142static volatile unsigned int nreqs, nready, npending; 371struct eio_pwd
143static volatile unsigned int max_idle = 4;
144
145static mutex_t reslock = X_MUTEX_INIT;
146static mutex_t reqlock = X_MUTEX_INIT;
147static cond_t reqwait = X_COND_INIT;
148
149unsigned int eio_nreqs (void)
150{ 372{
151 return nreqs; 373#if HAVE_AT
152} 374 int fd;
153 375#endif
154unsigned int eio_nready (void)
155{
156 unsigned int retval;
157
158 if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
159 retval = nready;
160 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
161
162 return retval;
163}
164
165unsigned int eio_npending (void)
166{
167 unsigned int retval;
168
169 if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
170 retval = npending;
171 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
172
173 return retval;
174}
175
176unsigned int eio_nthreads (void)
177{
178 unsigned int retval;
179
180 if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
181 retval = started;
182 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
183
184 return retval;
185}
186
187/*
188 * a somewhat faster data structure might be nice, but
189 * with 8 priorities this actually needs <20 insns
190 * per shift, the most expensive operation.
191 */
192typedef struct {
193 eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */
194 int size; 376 int len;
195} reqq; 377 char str[1]; /* actually, a 0-terminated canonical path */
378};
196 379
197static reqq req_queue; 380/*****************************************************************************/
198static reqq res_queue;
199 381
200static int reqq_push (reqq *q, eio_req *req) 382#define ETP_PRI_MIN EIO_PRI_MIN
201{ 383#define ETP_PRI_MAX EIO_PRI_MAX
202 int pri = req->pri;
203 req->next = 0;
204 384
205 if (q->qe[pri]) 385#define ETP_TYPE_QUIT -1
206 { 386#define ETP_TYPE_GROUP EIO_GROUP
207 q->qe[pri]->next = req;
208 q->qe[pri] = req;
209 }
210 else
211 q->qe[pri] = q->qs[pri] = req;
212 387
213 return q->size++; 388struct etp_worker;
214}
215 389
216static eio_req *reqq_shift (reqq *q) 390#define ETP_REQ eio_req
217{ 391#define ETP_DESTROY(req) eio_destroy (req)
218 int pri; 392static int eio_finish (eio_req *req);
393#define ETP_FINISH(req) eio_finish (req)
394static void eio_execute (struct etp_worker *self, eio_req *req);
395#define ETP_EXECUTE(wrk,req) eio_execute (wrk, req)
219 396
220 if (!q->size) 397#include "etp.c"
221 return 0;
222 398
223 --q->size; 399/*****************************************************************************/
224 400
225 for (pri = EIO_NUM_PRI; pri--; ) 401static void
226 {
227 eio_req *req = q->qs[pri];
228
229 if (req)
230 {
231 if (!(q->qs[pri] = (eio_req *)req->next))
232 q->qe[pri] = 0;
233
234 return req;
235 }
236 }
237
238 abort ();
239}
240
241static void grp_try_feed (eio_req *grp) 402grp_try_feed (eio_req *grp)
242{ 403{
243 while (grp->size < grp->int2 && !EIO_CANCELLED (grp)) 404 while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
244 { 405 {
245 int old_len = grp->size; 406 grp->flags &= ~EIO_FLAG_GROUPADD;
246 407
247 EIO_FEED (grp); 408 EIO_FEED (grp);
248 409
249 /* stop if no progress has been made */ 410 /* stop if no progress has been made */
250 if (old_len == grp->size) 411 if (!(grp->flags & EIO_FLAG_GROUPADD))
251 { 412 {
252 grp->feed = 0; 413 grp->feed = 0;
253 break; 414 break;
254 } 415 }
255 } 416 }
256} 417}
257 418
258static int eio_finish (eio_req *req); 419static int
259
260static int grp_dec (eio_req *grp) 420grp_dec (eio_req *grp)
261{ 421{
262 --grp->size; 422 --grp->size;
263 423
264 /* call feeder, if applicable */ 424 /* call feeder, if applicable */
265 grp_try_feed (grp); 425 grp_try_feed (grp);
… …
269 return eio_finish (grp); 429 return eio_finish (grp);
270 else 430 else
271 return 0; 431 return 0;
272} 432}
273 433
434static void
274void eio_destroy (eio_req *req) 435eio_destroy (eio_req *req)
275{ 436{
276 if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1); 437 if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
277 if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2); 438 if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
278 439
279 EIO_DESTROY (req); 440 EIO_DESTROY (req);
280} 441}
281 442
443static int
282static int eio_finish (eio_req *req) 444eio_finish (eio_req *req)
283{ 445{
284 int res = EIO_FINISH (req); 446 int res = EIO_FINISH (req);
285 447
286 if (req->grp) 448 if (req->grp)
287 { 449 {
… …
295 if (grp->grp_first == req) 457 if (grp->grp_first == req)
296 grp->grp_first = req->grp_next; 458 grp->grp_first = req->grp_next;
297 459
298 res2 = grp_dec (grp); 460 res2 = grp_dec (grp);
299 461
300 if (!res && res2) 462 if (!res)
301 res = res2; 463 res = res2;
302 } 464 }
303 465
304 eio_destroy (req); 466 eio_destroy (req);
305 467
306 return res; 468 return res;
307} 469}
308 470
471void
309void eio_grp_cancel (eio_req *grp) 472eio_grp_cancel (eio_req *grp)
310{ 473{
311 for (grp = grp->grp_first; grp; grp = grp->grp_next)
312 eio_cancel (grp); 474 etp_grp_cancel (grp);
313} 475}
314 476
477void
315void eio_cancel (eio_req *req) 478eio_cancel (eio_req *req)
316{ 479{
317 X_LOCK (wrklock);
318 req->flags |= EIO_FLAG_CANCELLED;
319 X_UNLOCK (wrklock);
320
321 eio_grp_cancel (req); 480 etp_cancel (req);
322} 481}
323 482
324X_THREAD_PROC (eio_proc); 483void
325
326static void start_thread (void)
327{
328 worker *wrk = calloc (1, sizeof (worker));
329
330 /*TODO*/
331 assert (("unable to allocate worker thread data", !wrk));
332
333 X_LOCK (wrklock);
334
335 if (thread_create (&wrk->tid, eio_proc, (void *)wrk))
336 {
337 wrk->prev = &wrk_first;
338 wrk->next = wrk_first.next;
339 wrk_first.next->prev = wrk;
340 wrk_first.next = wrk;
341 ++started;
342 }
343 else
344 free (wrk);
345
346 X_UNLOCK (wrklock);
347}
348
349static void maybe_start_thread (void)
350{
351 if (eio_nthreads () >= wanted)
352 return;
353
354 /* todo: maybe use idle here, but might be less exact */
355 if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())
356 return;
357
358 start_thread ();
359}
360
361void eio_submit (eio_req *req) 484eio_submit (eio_req *req)
362{ 485{
363 ++nreqs; 486 etp_submit (req);
364
365 X_LOCK (reqlock);
366 ++nready;
367 reqq_push (&req_queue, req);
368 X_COND_SIGNAL (reqwait);
369 X_UNLOCK (reqlock);
370
371 maybe_start_thread ();
372} 487}
373 488
374static void end_thread (void) 489unsigned int
490eio_nreqs (void)
375{ 491{
376 eio_req *req = calloc (1, sizeof (eio_req)); 492 return etp_nreqs ();
377
378 req->type = EIO_QUIT;
379 req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;
380
381 X_LOCK (reqlock);
382 reqq_push (&req_queue, req);
383 X_COND_SIGNAL (reqwait);
384 X_UNLOCK (reqlock);
385
386 X_LOCK (wrklock);
387 --started;
388 X_UNLOCK (wrklock);
389} 493}
390 494
495unsigned int
496eio_nready (void)
497{
498 return etp_nready ();
499}
500
501unsigned int
502eio_npending (void)
503{
504 return etp_npending ();
505}
506
507unsigned int ecb_cold
508eio_nthreads (void)
509{
510 return etp_nthreads ();
511}
512
513void ecb_cold
391void eio_set_max_poll_time (double nseconds) 514eio_set_max_poll_time (double nseconds)
392{ 515{
393 if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
394 max_poll_time = nseconds; 516 etp_set_max_poll_time (nseconds);
395 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
396} 517}
397 518
519void ecb_cold
398void eio_set_max_poll_reqs (unsigned int maxreqs) 520eio_set_max_poll_reqs (unsigned int maxreqs)
399{ 521{
400 if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
401 max_poll_reqs = maxreqs; 522 etp_set_max_poll_reqs (maxreqs);
402 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
403} 523}
404 524
525void ecb_cold
405void eio_set_max_idle (unsigned int nthreads) 526eio_set_max_idle (unsigned int nthreads)
406{ 527{
407 if (WORDACCESS_UNSAFE) X_LOCK (reqlock); 528 etp_set_max_idle (nthreads);
408 max_idle = nthreads <= 0 ? 1 : nthreads;
409 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
410} 529}
411 530
531void ecb_cold
532eio_set_idle_timeout (unsigned int seconds)
533{
534 etp_set_idle_timeout (seconds);
535}
536
537void ecb_cold
412void eio_set_min_parallel (unsigned int nthreads) 538eio_set_min_parallel (unsigned int nthreads)
413{ 539{
414 if (wanted < nthreads) 540 etp_set_min_parallel (nthreads);
415 wanted = nthreads;
416} 541}
417 542
543void ecb_cold
418void eio_set_max_parallel (unsigned int nthreads) 544eio_set_max_parallel (unsigned int nthreads)
419{ 545{
420 if (wanted > nthreads) 546 etp_set_max_parallel (nthreads);
421 wanted = nthreads;
422
423 while (started > wanted)
424 end_thread ();
425} 547}
426 548
427int eio_poll (void) 549int eio_poll (void)
428{ 550{
429 int maxreqs = max_poll_reqs; 551 return etp_poll ();
430 struct timeval tv_start, tv_now;
431 eio_req *req;
432
433 if (max_poll_time)
434 gettimeofday (&tv_start, 0);
435
436 for (;;)
437 {
438 maybe_start_thread ();
439
440 X_LOCK (reslock);
441 req = reqq_shift (&res_queue);
442
443 if (req)
444 {
445 --npending;
446
447 if (!res_queue.size && done_poll_cb)
448 done_poll_cb ();
449 }
450
451 X_UNLOCK (reslock);
452
453 if (!req)
454 return 0;
455
456 --nreqs;
457
458 if (req->type == EIO_GROUP && req->size)
459 {
460 req->int1 = 1; /* mark request as delayed */
461 continue;
462 }
463 else
464 {
465 int res = eio_finish (req);
466 if (res)
467 return res;
468 }
469
470 if (maxreqs && !--maxreqs)
471 break;
472
473 if (max_poll_time)
474 {
475 gettimeofday (&tv_now, 0);
476
477 if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
478 break;
479 }
480 }
481
482 errno = EAGAIN;
483 return -1;
484} 552}
485 553
486/*****************************************************************************/ 554/*****************************************************************************/
487/* work around various missing functions */ 555/* work around various missing functions */
488 556
489#if !HAVE_PREADWRITE
490# define pread aio_pread
491# define pwrite aio_pwrite
492
493/*
494 * make our pread/pwrite safe against themselves, but not against
495 * normal read/write by using a mutex. slows down execution a lot,
496 * but that's your problem, not mine.
497 */
498static mutex_t preadwritelock = X_MUTEX_INIT;
499
500static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
501{
502 ssize_t res;
503 off_t ooffset;
504
505 X_LOCK (preadwritelock);
506 ooffset = lseek (fd, 0, SEEK_CUR);
507 lseek (fd, offset, SEEK_SET);
508 res = read (fd, buf, count);
509 lseek (fd, ooffset, SEEK_SET);
510 X_UNLOCK (preadwritelock);
511
512 return res;
513}
514
515static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
516{
517 ssize_t res;
518 off_t ooffset;
519
520 X_LOCK (preadwritelock);
521 ooffset = lseek (fd, 0, SEEK_CUR);
522 lseek (fd, offset, SEEK_SET);
523 res = write (fd, buf, count);
524 lseek (fd, offset, SEEK_SET);
525 X_UNLOCK (preadwritelock);
526
527 return res;
528}
529#endif
530
531#ifndef HAVE_FUTIMES 557#ifndef HAVE_UTIMES
532 558
559# undef utimes
533# define utimes(path,times) aio_utimes (path, times) 560# define utimes(path,times) eio__utimes (path, times)
534# define futimes(fd,times) aio_futimes (fd, times)
535 561
562static int
536static int aio_utimes (const char *filename, const struct timeval times[2]) 563eio__utimes (const char *filename, const struct timeval times[2])
537{ 564{
538 if (times) 565 if (times)
539 { 566 {
540 struct utimbuf buf; 567 struct utimbuf buf;
541 568
… …
546 } 573 }
547 else 574 else
548 return utime (filename, 0); 575 return utime (filename, 0);
549} 576}
550 577
578#endif
579
580#ifndef HAVE_FUTIMES
581
582# undef futimes
583# define futimes(fd,times) eio__futimes (fd, times)
584
585static int
551static int aio_futimes (int fd, const struct timeval tv[2]) 586eio__futimes (int fd, const struct timeval tv[2])
552{ 587{
553 errno = ENOSYS; 588 errno = ENOSYS;
554 return -1; 589 return -1;
555} 590}
556 591
557#endif 592#endif
558 593
559#if !HAVE_FDATASYNC 594#if !HAVE_FDATASYNC
595# undef fdatasync
560# define fdatasync fsync 596# define fdatasync(fd) fsync (fd)
561#endif 597#endif
598
599static int
600eio__syncfs (int fd)
601{
602 int res;
603
604#if HAVE_SYS_SYNCFS
605 res = (int)syscall (__NR_syncfs, (int)(fd));
606#else
607 res = EIO_ENOSYS ();
608#endif
609
610 if (res < 0 && errno == ENOSYS && fd >= 0)
611 sync ();
612
613 return res;
614}
615
616/* sync_file_range always needs emulation */
617static int
618eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
619{
620#if HAVE_SYNC_FILE_RANGE
621 int res;
622
623 if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE
624 || EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE
625 || EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER)
626 {
627 flags = 0
628 | (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0)
629 | (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0)
630 | (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0);
631 }
632
633 res = sync_file_range (fd, offset, nbytes, flags);
634
635 if (!res || errno != ENOSYS)
636 return res;
637#endif
638
639 /* even though we could play tricks with the flags, it's better to always
640 * call fdatasync, as that matches the expectation of its users best */
641 return fdatasync (fd);
642}
643
644static int
645eio__fallocate (int fd, int mode, off_t offset, size_t len)
646{
647#if HAVE_LINUX_FALLOCATE
648 return fallocate (fd, mode, offset, len);
649#else
650 return EIO_ENOSYS ();
651#endif
652}
562 653
563#if !HAVE_READAHEAD 654#if !HAVE_READAHEAD
655# undef readahead
564# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self) 656# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
565 657
658static eio_ssize_t
566static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self) 659eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
567{ 660{
568 size_t todo = count; 661 size_t todo = count;
569 dBUF; 662 dBUF;
570 663
571 while (todo > 0) 664 while (todo > 0)
… …
575 pread (fd, eio_buf, len, offset); 668 pread (fd, eio_buf, len, offset);
576 offset += len; 669 offset += len;
577 todo -= len; 670 todo -= len;
578 } 671 }
579 672
580 errno = 0; 673 FUBd;
674
675 /* linux's readahead basically only fails for EBADF or EINVAL (not mmappable) */
676 /* but not for e.g. EIO or eof, so we also never fail */
581 return count; 677 return 0;
582} 678}
583 679
584#endif
585
586#if !HAVE_READDIR_R
587# define readdir_r aio_readdir_r
588
589static mutex_t readdirlock = X_MUTEX_INIT;
590
591static int readdir_r (DIR *dirp, EIO_STRUCT_DIRENT *ent, EIO_STRUCT_DIRENT **res)
592{
593 EIO_STRUCT_DIRENT *e;
594 int errorno;
595
596 X_LOCK (readdirlock);
597
598 e = readdir (dirp);
599 errorno = errno;
600
601 if (e)
602 {
603 *res = ent;
604 strcpy (ent->d_name, e->d_name);
605 }
606 else
607 *res = 0;
608
609 X_UNLOCK (readdirlock);
610
611 errno = errorno;
612 return e ? 0 : -1;
613}
614#endif 680#endif
615 681
616/* sendfile always needs emulation */ 682/* sendfile always needs emulation */
683static eio_ssize_t
617static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self) 684eio__sendfile (int ofd, int ifd, off_t offset, size_t count)
618{ 685{
686 eio_ssize_t written = 0;
619 ssize_t res; 687 eio_ssize_t res;
620 688
621 if (!count) 689 if (!count)
622 return 0; 690 return 0;
623 691
692 for (;;)
693 {
694#ifdef __APPLE__
695# undef HAVE_SENDFILE /* broken, as everything on os x */
696#endif
624#if HAVE_SENDFILE 697#if HAVE_SENDFILE
625# if __linux 698# if __linux
699 off_t soffset = offset;
626 res = sendfile (ofd, ifd, &offset, count); 700 res = sendfile (ofd, ifd, &soffset, count);
627 701
628# elif __freebsd 702# elif __FreeBSD__
629 /* 703 /*
630 * Of course, the freebsd sendfile is a dire hack with no thoughts 704 * Of course, the freebsd sendfile is a dire hack with no thoughts
631 * wasted on making it similar to other I/O functions. 705 * wasted on making it similar to other I/O functions.
632 */ 706 */
633 {
634 off_t sbytes; 707 off_t sbytes;
635 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); 708 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
636 709
637 if (res < 0 && sbytes) 710 #if 0 /* according to the manpage, this is correct, but broken behaviour */
638 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */ 711 /* freebsd' sendfile will return 0 on success */
712 /* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */
713 /* not on e.g. EIO or EPIPE - sounds broken */
714 if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0)
639 res = sbytes; 715 res = sbytes;
640 } 716 #endif
717
718 /* according to source inspection, this is correct, and useful behaviour */
719 if (sbytes)
720 res = sbytes;
721
722# elif defined __APPLE__
723 off_t sbytes = count;
724 res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
725
726 /* according to the manpage, sbytes is always valid */
727 if (sbytes)
728 res = sbytes;
641 729
642# elif __hpux 730# elif __hpux
643 res = sendfile (ofd, ifd, offset, count, 0, 0); 731 res = sendfile (ofd, ifd, offset, count, 0, 0);
644 732
645# elif __solaris 733# elif __solaris
646 {
647 struct sendfilevec vec; 734 struct sendfilevec vec;
648 size_t sbytes; 735 size_t sbytes;
649 736
650 vec.sfv_fd = ifd; 737 vec.sfv_fd = ifd;
651 vec.sfv_flag = 0; 738 vec.sfv_flag = 0;
652 vec.sfv_off = offset; 739 vec.sfv_off = offset;
653 vec.sfv_len = count; 740 vec.sfv_len = count;
654 741
655 res = sendfilev (ofd, &vec, 1, &sbytes); 742 res = sendfilev (ofd, &vec, 1, &sbytes);
656 743
657 if (res < 0 && sbytes) 744 if (res < 0 && sbytes)
658 res = sbytes; 745 res = sbytes;
659 }
660 746
661# endif 747# endif
748
749#elif defined (_WIN32) && 0
750 /* does not work, just for documentation of what would need to be done */
751 /* actually, cannot be done like this, as TransmitFile changes the file offset, */
752 /* libeio guarantees that the file offset does not change, and windows */
753 /* has no way to get an independent handle to the same file description */
754 HANDLE h = TO_SOCKET (ifd);
755 SetFilePointer (h, offset, 0, FILE_BEGIN);
756 res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
757
662#else 758#else
663 res = -1; 759 res = EIO_ENOSYS ();
664 errno = ENOSYS;
665#endif 760#endif
666 761
762 /* we assume sendfile can copy at least 128mb in one go */
763 if (res <= 128 * 1024 * 1024)
764 {
765 if (res > 0)
766 written += res;
767
768 if (written)
769 return written;
770
771 break;
772 }
773 else
774 {
775 /* if we requested more, then probably the kernel was lazy */
776 written += res;
777 offset += res;
778 count -= res;
779
780 if (!count)
781 return written;
782 }
783 }
784
667 if (res < 0 785 if (res < 0
668 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK 786 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
787 /* BSDs */
788#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */
789 || errno == ENOTSUP
790#endif
791#ifdef EOPNOTSUPP /* windows */
792 || errno == EOPNOTSUPP /* BSDs */
793#endif
669#if __solaris 794#if __solaris
670 || errno == EAFNOSUPPORT || errno == EPROTOTYPE 795 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
671#endif 796#endif
672 ) 797 )
673 ) 798 )
… …
677 802
678 res = 0; 803 res = 0;
679 804
680 while (count) 805 while (count)
681 { 806 {
682 ssize_t cnt; 807 eio_ssize_t cnt;
683 808
684 cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset); 809 cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);
685 810
686 if (cnt <= 0) 811 if (cnt <= 0)
687 { 812 {
… …
699 824
700 offset += cnt; 825 offset += cnt;
701 res += cnt; 826 res += cnt;
702 count -= cnt; 827 count -= cnt;
703 } 828 }
829
830 FUBd;
704 } 831 }
705 832
706 return res; 833 return res;
707} 834}
708 835
709/* read a full directory */ 836#ifdef PAGESIZE
710static void scandir_ (eio_req *req, worker *self) 837# define eio_pagesize() PAGESIZE
838#else
839static intptr_t
840eio_pagesize (void)
711{ 841{
712 DIR *dirp; 842 static intptr_t page;
713 union
714 {
715 EIO_STRUCT_DIRENT d;
716 char b [offsetof (EIO_STRUCT_DIRENT, d_name) + NAME_MAX + 1];
717 } *u;
718 EIO_STRUCT_DIRENT *entp;
719 char *name, *names;
720 int memlen = 4096;
721 int memofs = 0;
722 int res = 0;
723 843
724 X_LOCK (wrklock); 844 if (!page)
725 self->dirp = dirp = opendir (req->ptr1); 845 page = sysconf (_SC_PAGESIZE);
726 self->dbuf = u = malloc (sizeof (*u));
727 req->flags |= EIO_FLAG_PTR2_FREE;
728 req->ptr2 = names = malloc (memlen);
729 X_UNLOCK (wrklock);
730 846
731 if (dirp && u && names) 847 return page;
732 for (;;) 848}
849#endif
850
851static void
852eio_page_align (void **addr, size_t *length)
853{
854 intptr_t mask = eio_pagesize () - 1;
855
856 /* round down addr */
857 intptr_t adj = mask & (intptr_t)*addr;
858
859 *addr = (void *)((intptr_t)*addr - adj);
860 *length += adj;
861
862 /* round up length */
863 *length = (*length + mask) & ~mask;
864}
865
866#if !_POSIX_MEMLOCK
867# define eio__mlockall(a) EIO_ENOSYS ()
868#else
869
870static int
871eio__mlockall (int flags)
872{
873 #if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
874 extern int mallopt (int, int);
875 mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
876 #endif
877
878 if (EIO_MCL_CURRENT != MCL_CURRENT
879 || EIO_MCL_FUTURE != MCL_FUTURE)
880 {
881 flags = 0
882 | (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0)
883 | (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0);
884 }
885
886 return mlockall (flags);
887}
888#endif
889
890#if !_POSIX_MEMLOCK_RANGE
891# define eio__mlock(a,b) EIO_ENOSYS ()
892#else
893
894static int
895eio__mlock (void *addr, size_t length)
896{
897 eio_page_align (&addr, &length);
898
899 return mlock (addr, length);
900}
901
902#endif
903
904#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
905# define eio__msync(a,b,c) EIO_ENOSYS ()
906#else
907
908static int
909eio__msync (void *mem, size_t len, int flags)
910{
911 eio_page_align (&mem, &len);
912
913 if (EIO_MS_ASYNC != MS_SYNC
914 || EIO_MS_INVALIDATE != MS_INVALIDATE
915 || EIO_MS_SYNC != MS_SYNC)
916 {
917 flags = 0
918 | (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
919 | (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
920 | (flags & EIO_MS_SYNC ? MS_SYNC : 0);
921 }
922
923 return msync (mem, len, flags);
924}
925
926#endif
927
928static int
929eio__mtouch (eio_req *req)
930{
931 void *mem = req->ptr2;
932 size_t len = req->size;
933 int flags = req->int1;
934
935 eio_page_align (&mem, &len);
936
937 {
938 intptr_t addr = (intptr_t)mem;
939 intptr_t end = addr + len;
940 intptr_t page = eio_pagesize ();
941
942 if (addr < end)
943 if (flags & EIO_MT_MODIFY) /* modify */
944 do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req));
945 else
946 do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req));
947 }
948
949 return 0;
950}
951
952/*****************************************************************************/
953/* requests implemented outside eio_execute, because they are so large */
954
955static void
956eio__lseek (eio_req *req)
957{
958 /* this usually gets optimised away completely, or your compiler sucks, */
959 /* or the whence constants really are not 0, 1, 2 */
960 int whence = req->int2 == EIO_SEEK_SET ? SEEK_SET
961 : req->int2 == EIO_SEEK_CUR ? SEEK_CUR
962 : req->int2 == EIO_SEEK_END ? SEEK_END
963 : req->int2;
964
965 req->offs = lseek (req->int1, req->offs, whence);
966 req->result = req->offs == (off_t)-1 ? -1 : 0;
967}
968
969/* result will always end up in tmpbuf, there is always space for adding a 0-byte */
970static int
971eio__realpath (struct tmpbuf *tmpbuf, eio_wd wd, const char *path)
972{
973 char *res;
974 const char *rel = path;
975 char *tmp1, *tmp2;
976#if SYMLOOP_MAX > 32
977 int symlinks = SYMLOOP_MAX;
978#else
979 int symlinks = 32;
980#endif
981
982 errno = EINVAL;
983 if (!rel)
984 return -1;
985
986 errno = ENOENT;
987 if (!*rel)
988 return -1;
989
990 res = tmpbuf_get (tmpbuf, PATH_MAX * 3);
991#ifdef _WIN32
992 if (_access (rel, 4) != 0)
993 return -1;
994
995 symlinks = GetFullPathName (rel, PATH_MAX * 3, res, 0);
996
997 errno = ENAMETOOLONG;
998 if (symlinks >= PATH_MAX * 3)
999 return -1;
1000
1001 errno = EIO;
1002 if (symlinks <= 0)
1003 return -1;
1004
1005 return symlinks;
1006
1007#else
1008 tmp1 = res + PATH_MAX;
1009 tmp2 = tmp1 + PATH_MAX;
1010
1011#if 0 /* disabled, the musl way to do things is just too racy */
1012#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
1013 /* on linux we may be able to ask the kernel */
1014 {
1015 int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME);
1016
1017 if (fd >= 0)
733 { 1018 {
1019 sprintf (tmp1, "/proc/self/fd/%d", fd);
1020 req->result = readlink (tmp1, res, PATH_MAX);
1021 /* here we should probably stat the open file and the disk file, to make sure they still match */
1022 close (fd);
1023
1024 if (req->result > 0)
1025 goto done;
1026 }
1027 else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)
1028 return -1;
1029 }
1030#endif
1031#endif
1032
1033 if (*rel != '/')
1034 {
1035 int len;
1036
734 errno = 0; 1037 errno = ENOENT;
735 readdir_r (dirp, &u->d, &entp); 1038 if (wd == EIO_INVALID_WD)
1039 return -1;
1040
1041 if (wd == EIO_CWD)
1042 {
1043 if (!getcwd (res, PATH_MAX))
1044 return -1;
736 1045
737 if (!entp) 1046 len = strlen (res);
1047 }
1048 else
1049 memcpy (res, wd->str, len = wd->len);
1050
1051 if (res [1]) /* only use if not / */
1052 res += len;
1053 }
1054
1055 while (*rel)
1056 {
1057 eio_ssize_t len, linklen;
1058 const char *beg = rel;
1059
1060 while (*rel && *rel != '/')
1061 ++rel;
1062
1063 len = rel - beg;
1064
1065 if (!len) /* skip slashes */
1066 {
738 break; 1067 ++rel;
1068 continue;
1069 }
739 1070
740 name = entp->d_name; 1071 if (beg [0] == '.')
1072 {
1073 if (len == 1)
1074 continue; /* . - nop */
741 1075
742 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) 1076 if (beg [1] == '.' && len == 2)
1077 {
1078 /* .. - back up one component, if possible */
1079
1080 while (res != tmpbuf->ptr)
1081 if (*--res == '/')
1082 break;
1083
1084 continue;
1085 }
1086 }
1087
1088 errno = ENAMETOOLONG;
1089 if (res + 1 + len + 1 >= tmp1)
1090 return -1;
1091
1092 /* copy one component */
1093 *res = '/';
1094 memcpy (res + 1, beg, len);
1095
1096 /* zero-terminate, for readlink */
1097 res [len + 1] = 0;
1098
1099 /* now check if it's a symlink */
1100 linklen = readlink (tmpbuf->ptr, tmp1, PATH_MAX);
1101
1102 if (linklen < 0)
743 { 1103 {
1104 if (errno != EINVAL)
1105 return -1;
1106
1107 /* it's a normal directory. hopefully */
1108 res += len + 1;
1109 }
1110 else
1111 {
1112 /* yay, it was a symlink - build new path in tmp2 */
744 int len = strlen (name) + 1; 1113 int rellen = strlen (rel);
745 1114
1115 errno = ENAMETOOLONG;
1116 if (linklen + 1 + rellen >= PATH_MAX)
1117 return -1;
1118
1119 errno = ELOOP;
1120 if (!--symlinks)
1121 return -1;
1122
1123 if (*tmp1 == '/')
1124 res = tmpbuf->ptr; /* symlink resolves to an absolute path */
1125
1126 /* we need to be careful, as rel might point into tmp2 already */
1127 memmove (tmp2 + linklen + 1, rel, rellen + 1);
1128 tmp2 [linklen] = '/';
1129 memcpy (tmp2, tmp1, linklen);
1130
1131 rel = tmp2;
1132 }
1133 }
1134
1135 /* special case for the lone root path */
1136 if (res == tmpbuf->ptr)
1137 *res++ = '/';
1138
1139 return res - (char *)tmpbuf->ptr;
1140#endif
1141}
1142
1143static signed char
1144eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
1145{
1146 return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */
1147 : a->inode < b->inode ? -1
1148 : a->inode > b->inode ? 1
1149 : 0;
1150}
1151
1152#define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0
1153
1154#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */
1155#define EIO_SORT_FAST 60 /* when to only use insertion sort */
1156
1157static void
1158eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits)
1159{
1160 unsigned char bits [9 + sizeof (eio_ino_t) * 8];
1161 unsigned char *bit = bits;
1162
1163 assert (CHAR_BIT == 8);
1164 assert (sizeof (eio_dirent) * 8 < 256);
1165 assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */
1166 assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */
1167
1168 if (size <= EIO_SORT_FAST)
1169 return;
1170
1171 /* first prepare an array of bits to test in our radix sort */
1172 /* try to take endianness into account, as well as differences in eio_ino_t sizes */
1173 /* inode_bits must contain all inodes ORed together */
1174 /* which is used to skip bits that are 0 everywhere, which is very common */
1175 {
1176 eio_ino_t endianness;
1177 int i, j;
1178
1179 /* we store the byte offset of byte n into byte n of "endianness" */
1180 for (i = 0; i < sizeof (eio_ino_t); ++i)
1181 ((unsigned char *)&endianness)[i] = i;
1182
1183 *bit++ = 0;
1184
1185 for (i = 0; i < sizeof (eio_ino_t); ++i)
1186 {
1187 /* shifting off the byte offsets out of "endianness" */
1188 int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8;
1189 endianness >>= 8;
1190
1191 for (j = 0; j < 8; ++j)
1192 if (inode_bits & (((eio_ino_t)1) << (i * 8 + j)))
1193 *bit++ = offs + j;
1194 }
1195
1196 for (j = 0; j < 8; ++j)
1197 if (score_bits & (1 << j))
1198 *bit++ = offsetof (eio_dirent, score) * 8 + j;
1199 }
1200
1201 /* now actually do the sorting (a variant of MSD radix sort) */
1202 {
1203 eio_dirent *base_stk [9 + sizeof (eio_ino_t) * 8], *base;
1204 eio_dirent *end_stk [9 + sizeof (eio_ino_t) * 8], *end;
1205 unsigned char *bit_stk [9 + sizeof (eio_ino_t) * 8];
1206 int stk_idx = 0;
1207
1208 base_stk [stk_idx] = dents;
1209 end_stk [stk_idx] = dents + size;
1210 bit_stk [stk_idx] = bit - 1;
1211
1212 do
1213 {
1214 base = base_stk [stk_idx];
1215 end = end_stk [stk_idx];
1216 bit = bit_stk [stk_idx];
1217
1218 for (;;)
1219 {
1220 unsigned char O = *bit >> 3;
1221 unsigned char M = 1 << (*bit & 7);
1222
1223 eio_dirent *a = base;
1224 eio_dirent *b = end;
1225
1226 if (b - a < EIO_SORT_CUTOFF)
746 res++; 1227 break;
747 1228
748 while (memofs + len > memlen) 1229 /* now bit-partition the array on the bit */
1230 /* this ugly asymmetric loop seems to perform much better than typical */
1231 /* partition algos found in the literature */
1232 do
1233 if (!(((unsigned char *)a)[O] & M))
1234 ++a;
1235 else if (!(((unsigned char *)--b)[O] & M))
749 { 1236 {
750 memlen *= 2; 1237 eio_dirent tmp = *a; *a = *b; *b = tmp;
751 X_LOCK (wrklock);
752 req->ptr2 = names = realloc (names, memlen);
753 X_UNLOCK (wrklock);
754
755 if (!names)
756 break; 1238 ++a;
757 } 1239 }
1240 while (b > a);
758 1241
759 memcpy (names + memofs, name, len); 1242 /* next bit, or stop, if no bits left in this path */
760 memofs += len; 1243 if (!*--bit)
1244 break;
1245
1246 base_stk [stk_idx] = a;
1247 end_stk [stk_idx] = end;
1248 bit_stk [stk_idx] = bit;
1249 ++stk_idx;
1250
1251 end = a;
761 } 1252 }
762 } 1253 }
763 1254 while (stk_idx--);
764 if (errno)
765 res = -1;
766 1255 }
1256}
1257
1258static void
1259eio_dent_insertion_sort (eio_dirent *dents, int size)
1260{
1261 /* first move the smallest element to the front, to act as a sentinel */
1262 {
1263 int i;
1264 eio_dirent *min = dents;
1265
1266 /* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */
1267 for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; )
1268 if (EIO_DENT_CMP (dents [i], <, *min))
1269 min = &dents [i];
1270
1271 /* swap elements 0 and j (minimum) */
1272 {
1273 eio_dirent tmp = *dents; *dents = *min; *min = tmp;
1274 }
1275 }
1276
1277 /* then do standard insertion sort, assuming that all elements are >= dents [0] */
1278 {
1279 eio_dirent *i, *j;
1280
1281 for (i = dents + 1; i < dents + size; ++i)
1282 {
1283 eio_dirent value = *i;
1284
1285 for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j)
1286 j [1] = j [0];
1287
1288 j [1] = value;
1289 }
1290 }
1291}
1292
1293static void
1294eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits)
1295{
1296 if (size <= 1)
1297 return; /* our insertion sort relies on size > 0 */
1298
1299 /* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */
1300 /* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */
1301 eio_dent_radix_sort (dents, size, score_bits, inode_bits);
1302
1303 /* use an insertion sort at the end, or for small arrays, */
1304 /* as insertion sort is more efficient for small partitions */
1305 eio_dent_insertion_sort (dents, size);
1306}
1307
1308/* read a full directory */
1309static void
1310eio__scandir (eio_req *req, etp_worker *self)
1311{
1312 char *name, *names;
1313 int namesalloc = 4096 - sizeof (void *) * 4;
1314 int namesoffs = 0;
1315 int flags = req->int1;
1316 eio_dirent *dents = 0;
1317 int dentalloc = 128;
1318 int dentoffs = 0;
1319 eio_ino_t inode_bits = 0;
1320#ifdef _WIN32
1321 HANDLE dirp;
1322 WIN32_FIND_DATA entp;
1323#else
1324 DIR *dirp;
1325 EIO_STRUCT_DIRENT *entp;
1326#endif
1327
767 req->result = res; 1328 req->result = -1;
1329
1330 if (!(flags & EIO_READDIR_DENTS))
1331 flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
1332
1333#ifdef _WIN32
1334 {
1335 int len = strlen ((const char *)req->ptr1);
1336 char *path = malloc (MAX_PATH);
1337 const char *fmt;
1338 const char *reqpath = wd_expand (&self->tmpbuf, req->wd, req->ptr1);
1339
1340 if (!len)
1341 fmt = "./*";
1342 else if (reqpath[len - 1] == '/' || reqpath[len - 1] == '\\')
1343 fmt = "%s*";
1344 else
1345 fmt = "%s/*";
1346
1347 _snprintf (path, MAX_PATH, fmt, reqpath);
1348 dirp = FindFirstFile (path, &entp);
1349 free (path);
1350
1351 if (dirp == INVALID_HANDLE_VALUE)
1352 {
1353 /* should steal _dosmaperr */
1354 switch (GetLastError ())
1355 {
1356 case ERROR_FILE_NOT_FOUND:
1357 req->result = 0;
1358 break;
1359
1360 case ERROR_INVALID_NAME:
1361 case ERROR_PATH_NOT_FOUND:
1362 case ERROR_NO_MORE_FILES:
1363 errno = ENOENT;
1364 break;
1365
1366 case ERROR_NOT_ENOUGH_MEMORY:
1367 errno = ENOMEM;
1368 break;
1369
1370 default:
1371 errno = EINVAL;
1372 break;
1373 }
1374
1375 return;
1376 }
1377 }
1378#else
1379 #if HAVE_AT
1380 if (req->wd)
1381 {
1382 int fd = openat (WD2FD (req->wd), req->ptr1, O_CLOEXEC | O_SEARCH | O_DIRECTORY);
1383
1384 if (fd < 0)
1385 return;
1386
1387 dirp = fdopendir (fd);
1388
1389 if (!dirp)
1390 close (fd);
1391 }
1392 else
1393 dirp = opendir (req->ptr1);
1394 #else
1395 dirp = opendir (wd_expand (&self->tmpbuf, req->wd, req->ptr1));
1396 #endif
1397
1398 if (!dirp)
1399 return;
1400#endif
1401
1402 if (req->flags & EIO_FLAG_PTR1_FREE)
1403 free (req->ptr1);
1404
1405 req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
1406 req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
1407 req->ptr2 = names = malloc (namesalloc);
1408
1409 if (!names || (flags && !dents))
1410 return;
1411
1412 for (;;)
1413 {
1414 int done;
1415
1416#ifdef _WIN32
1417 done = !dirp;
1418#else
1419 errno = 0;
1420 entp = readdir (dirp);
1421 done = !entp;
1422#endif
1423
1424 if (done)
1425 {
1426#ifndef _WIN32
1427 int old_errno = errno;
1428 closedir (dirp);
1429 errno = old_errno;
1430
1431 if (errno)
1432 break;
1433#endif
1434
1435 /* sort etc. */
1436 req->int1 = flags;
1437 req->result = dentoffs;
1438
1439 if (flags & EIO_READDIR_STAT_ORDER)
1440 eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits);
1441 else if (flags & EIO_READDIR_DIRS_FIRST)
1442 if (flags & EIO_READDIR_FOUND_UNKNOWN)
1443 eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */
1444 else
1445 {
1446 /* in this case, all is known, and we just put dirs first and sort them */
1447 eio_dirent *oth = dents + dentoffs;
1448 eio_dirent *dir = dents;
1449
1450 /* now partition dirs to the front, and non-dirs to the back */
1451 /* by walking from both sides and swapping if necessary */
1452 while (oth > dir)
1453 {
1454 if (dir->type == EIO_DT_DIR)
1455 ++dir;
1456 else if ((--oth)->type == EIO_DT_DIR)
1457 {
1458 eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
1459
1460 ++dir;
1461 }
1462 }
1463
1464 /* now sort the dirs only (dirs all have the same score) */
1465 eio_dent_sort (dents, dir - dents, 0, inode_bits);
1466 }
1467
1468 break;
1469 }
1470
1471 /* now add the entry to our list(s) */
1472 name = D_NAME (entp);
1473
1474 /* skip . and .. entries */
1475 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1476 {
1477 int len = D_NAMLEN (entp) + 1;
1478
1479 while (ecb_expect_false (namesoffs + len > namesalloc))
1480 {
1481 namesalloc *= 2;
1482 req->ptr2 = names = realloc (names, namesalloc);
1483
1484 if (!names)
1485 break;
1486 }
1487
1488 memcpy (names + namesoffs, name, len);
1489
1490 if (dents)
1491 {
1492 struct eio_dirent *ent;
1493
1494 if (ecb_expect_false (dentoffs == dentalloc))
1495 {
1496 dentalloc *= 2;
1497 req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
1498
1499 if (!dents)
1500 break;
1501 }
1502
1503 ent = dents + dentoffs;
1504
1505 ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
1506 ent->namelen = len - 1;
1507 ent->inode = D_INO (entp);
1508
1509 inode_bits |= ent->inode;
1510
1511 switch (D_TYPE (entp))
1512 {
1513 default:
1514 ent->type = EIO_DT_UNKNOWN;
1515 flags |= EIO_READDIR_FOUND_UNKNOWN;
1516 break;
1517
1518 #ifdef DT_FIFO
1519 case DT_FIFO: ent->type = EIO_DT_FIFO; break;
1520 #endif
1521 #ifdef DT_CHR
1522 case DT_CHR: ent->type = EIO_DT_CHR; break;
1523 #endif
1524 #ifdef DT_MPC
1525 case DT_MPC: ent->type = EIO_DT_MPC; break;
1526 #endif
1527 #ifdef DT_DIR
1528 case DT_DIR: ent->type = EIO_DT_DIR; break;
1529 #endif
1530 #ifdef DT_NAM
1531 case DT_NAM: ent->type = EIO_DT_NAM; break;
1532 #endif
1533 #ifdef DT_BLK
1534 case DT_BLK: ent->type = EIO_DT_BLK; break;
1535 #endif
1536 #ifdef DT_MPB
1537 case DT_MPB: ent->type = EIO_DT_MPB; break;
1538 #endif
1539 #ifdef DT_REG
1540 case DT_REG: ent->type = EIO_DT_REG; break;
1541 #endif
1542 #ifdef DT_NWK
1543 case DT_NWK: ent->type = EIO_DT_NWK; break;
1544 #endif
1545 #ifdef DT_CMP
1546 case DT_CMP: ent->type = EIO_DT_CMP; break;
1547 #endif
1548 #ifdef DT_LNK
1549 case DT_LNK: ent->type = EIO_DT_LNK; break;
1550 #endif
1551 #ifdef DT_SOCK
1552 case DT_SOCK: ent->type = EIO_DT_SOCK; break;
1553 #endif
1554 #ifdef DT_DOOR
1555 case DT_DOOR: ent->type = EIO_DT_DOOR; break;
1556 #endif
1557 #ifdef DT_WHT
1558 case DT_WHT: ent->type = EIO_DT_WHT; break;
1559 #endif
1560 }
1561
1562 ent->score = 7;
1563
1564 if (flags & EIO_READDIR_DIRS_FIRST)
1565 {
1566 if (ent->type == EIO_DT_UNKNOWN)
1567 {
1568 if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
1569 ent->score = 1;
1570 else if (!strchr (name, '.')) /* absence of dots indicate likely dirs */
1571 ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
1572 }
1573 else if (ent->type == EIO_DT_DIR)
1574 ent->score = 0;
1575 }
1576 }
1577
1578 namesoffs += len;
1579 ++dentoffs;
1580 }
1581
1582 if (EIO_CANCELLED (req))
1583 {
1584 errno = ECANCELED;
1585 break;
1586 }
1587
1588#ifdef _WIN32
1589 if (!FindNextFile (dirp, &entp))
1590 {
1591 FindClose (dirp);
1592 dirp = 0;
1593 }
1594#endif
1595 }
768} 1596}
1597
1598/*****************************************************************************/
1599/* working directory stuff */
1600/* various deficiencies in the posix 2008 api force us to */
1601/* keep the absolute path in string form at all times */
1602/* fuck yeah. */
1603
1604#if !HAVE_AT
1605
1606/* a bit like realpath, but usually faster because it doesn'T have to return */
1607/* an absolute or canonical path */
1608static const char *
1609wd_expand (struct tmpbuf *tmpbuf, eio_wd wd, const char *path)
1610{
1611 if (!wd || *path == '/')
1612 return path;
1613
1614 if (path [0] == '.' && !path [1])
1615 return wd->str;
1616
1617 {
1618 int l1 = wd->len;
1619 int l2 = strlen (path);
1620
1621 char *res = tmpbuf_get (tmpbuf, l1 + l2 + 2);
1622
1623 memcpy (res, wd->str, l1);
1624 res [l1] = '/';
1625 memcpy (res + l1 + 1, path, l2 + 1);
1626
1627 return res;
1628 }
1629}
1630
1631#endif
1632
1633static eio_wd
1634eio__wd_open_sync (struct tmpbuf *tmpbuf, eio_wd wd, const char *path)
1635{
1636 int fd;
1637 eio_wd res;
1638 int len = eio__realpath (tmpbuf, wd, path);
1639
1640 if (len < 0)
1641 return EIO_INVALID_WD;
1642
1643#if HAVE_AT
1644 fd = openat (WD2FD (wd), path, O_CLOEXEC | O_SEARCH | O_DIRECTORY);
1645
1646 if (fd < 0)
1647 return EIO_INVALID_WD;
1648#endif
1649
1650 res = malloc (sizeof (*res) + len); /* one extra 0-byte */
1651
1652#if HAVE_AT
1653 res->fd = fd;
1654#endif
1655
1656 res->len = len;
1657 memcpy (res->str, tmpbuf->ptr, len);
1658 res->str [len] = 0;
1659
1660 return res;
1661}
1662
1663eio_wd
1664eio_wd_open_sync (eio_wd wd, const char *path)
1665{
1666 struct tmpbuf tmpbuf = { 0 };
1667 wd = eio__wd_open_sync (&tmpbuf, wd, path);
1668 free (tmpbuf.ptr);
1669
1670 return wd;
1671}
1672
1673void
1674eio_wd_close_sync (eio_wd wd)
1675{
1676 if (wd != EIO_INVALID_WD && wd != EIO_CWD)
1677 {
1678 #if HAVE_AT
1679 close (wd->fd);
1680 #endif
1681 free (wd);
1682 }
1683}
1684
1685#if HAVE_AT
1686
1687/* they forgot these */
1688
1689static int
1690eio__truncateat (int dirfd, const char *path, off_t length)
1691{
1692 int fd = openat (dirfd, path, O_WRONLY | O_CLOEXEC);
1693 int res;
1694
1695 if (fd < 0)
1696 return fd;
1697
1698 res = ftruncate (fd, length);
1699 close (fd);
1700 return res;
1701}
1702
1703static int
1704eio__statvfsat (int dirfd, const char *path, struct statvfs *buf)
1705{
1706 int fd = openat (dirfd, path, O_SEARCH | O_CLOEXEC);
1707 int res;
1708
1709 if (fd < 0)
1710 return fd;
1711
1712 res = fstatvfs (fd, buf);
1713 close (fd);
1714 return res;
1715
1716}
1717
1718#endif
769 1719
770/*****************************************************************************/ 1720/*****************************************************************************/
771 1721
772#define ALLOC(len) \ 1722#define ALLOC(len) \
773 if (!req->ptr2) \ 1723 if (!req->ptr2) \
… …
782 req->result = -1; \ 1732 req->result = -1; \
783 break; \ 1733 break; \
784 } \ 1734 } \
785 } 1735 }
786 1736
1737static void ecb_noinline ecb_cold
1738etp_proc_init (void)
1739{
1740#if HAVE_PRCTL_SET_NAME
1741 /* provide a more sensible "thread name" */
1742 char name[16 + 1];
1743 const int namelen = sizeof (name) - 1;
1744 int len;
1745
1746 prctl (PR_GET_NAME, (unsigned long)name, 0, 0, 0);
1747 name [namelen] = 0;
1748 len = strlen (name);
1749 strcpy (name + (len <= namelen - 4 ? len : namelen - 4), "/eio");
1750 prctl (PR_SET_NAME, (unsigned long)name, 0, 0, 0);
1751#endif
1752}
1753
1754/* TODO: move somehow to etp.c */
787X_THREAD_PROC (eio_proc) 1755X_THREAD_PROC (etp_proc)
788{ 1756{
789 eio_req *req; 1757 ETP_REQ *req;
790 struct timespec ts; 1758 struct timespec ts;
791 worker *self = (worker *)thr_arg; 1759 etp_worker *self = (etp_worker *)thr_arg;
792 1760
1761 etp_proc_init ();
1762
793 /* try to distribute timeouts somewhat randomly */ 1763 /* try to distribute timeouts somewhat evenly */
794 ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL); 1764 ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
795 1765
796 for (;;) 1766 for (;;)
797 { 1767 {
798 ts.tv_sec = time (0) + IDLE_TIMEOUT; 1768 ts.tv_sec = 0;
799 1769
800 X_LOCK (reqlock); 1770 X_LOCK (reqlock);
801 1771
802 for (;;) 1772 for (;;)
803 { 1773 {
804 self->req = req = reqq_shift (&req_queue); 1774 req = reqq_shift (&req_queue);
805 1775
806 if (req) 1776 if (req)
807 break; 1777 break;
808 1778
1779 if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */
1780 {
1781 X_UNLOCK (reqlock);
1782 X_LOCK (wrklock);
1783 --started;
1784 X_UNLOCK (wrklock);
1785 goto quit;
1786 }
1787
809 ++idle; 1788 ++idle;
810 1789
811 if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT) 1790 if (idle <= max_idle)
1791 /* we are allowed to idle, so do so without any timeout */
1792 X_COND_WAIT (reqwait, reqlock);
1793 else
812 { 1794 {
813 if (idle > max_idle) 1795 /* initialise timeout once */
814 { 1796 if (!ts.tv_sec)
815 --idle; 1797 ts.tv_sec = time (0) + idle_timeout;
816 X_UNLOCK (reqlock);
817 X_LOCK (wrklock);
818 --started;
819 X_UNLOCK (wrklock);
820 goto quit;
821 }
822 1798
823 /* we are allowed to idle, so do so without any timeout */
824 X_COND_WAIT (reqwait, reqlock); 1799 if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
825 ts.tv_sec = time (0) + IDLE_TIMEOUT; 1800 ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */
826 } 1801 }
827 1802
828 --idle; 1803 --idle;
829 } 1804 }
830 1805
831 --nready; 1806 --nready;
832 1807
833 X_UNLOCK (reqlock); 1808 X_UNLOCK (reqlock);
834 1809
835 errno = 0; /* strictly unnecessary */ 1810 if (req->type == ETP_TYPE_QUIT)
836
837 if (!EIO_CANCELLED (req))
838 switch (req->type)
839 {
840 case EIO_READ: ALLOC (req->size);
841 req->result = req->offs >= 0
842 ? pread (req->int1, req->ptr2, req->size, req->offs)
843 : read (req->int1, req->ptr2, req->size); break;
844 case EIO_WRITE: req->result = req->offs >= 0
845 ? pwrite (req->int1, req->ptr2, req->size, req->offs)
846 : write (req->int1, req->ptr2, req->size); break;
847
848 case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
849 case EIO_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
850
851 case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
852 req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
853 case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
854 req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
855 case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
856 req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
857
858 case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
859 case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
860 case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
861 case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
862 case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
863 case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
864
865 case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
866 case EIO_CLOSE: req->result = close (req->int1); break;
867 case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
868 case EIO_UNLINK: req->result = unlink (req->ptr1); break;
869 case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
870 case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
871 case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
872 case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
873 case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
874 case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
875
876 case EIO_READLINK: ALLOC (NAME_MAX);
877 req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
878
879 case EIO_SYNC: req->result = 0; sync (); break;
880 case EIO_FSYNC: req->result = fsync (req->int1); break;
881 case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
882
883 case EIO_READDIR: scandir_ (req, self); break;
884
885 case EIO_BUSY:
886#ifdef _WIN32
887 Sleep (req->nv1 * 1000.);
888#else
889 {
890 struct timeval tv;
891
892 tv.tv_sec = req->nv1;
893 tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
894
895 req->result = select (0, 0, 0, 0, &tv);
896 }
897#endif
898 break;
899
900 case EIO_UTIME:
901 case EIO_FUTIME:
902 {
903 struct timeval tv[2];
904 struct timeval *times;
905
906 if (req->nv1 != -1. || req->nv2 != -1.)
907 {
908 tv[0].tv_sec = req->nv1;
909 tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
910 tv[1].tv_sec = req->nv2;
911 tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
912
913 times = tv;
914 }
915 else
916 times = 0;
917
918
919 req->result = req->type == EIO_FUTIME
920 ? futimes (req->int1, times)
921 : utimes (req->ptr1, times);
922 }
923
924 case EIO_GROUP:
925 case EIO_NOP:
926 break;
927
928 case EIO_QUIT:
929 goto quit; 1811 goto quit;
930 1812
931 default: 1813 ETP_EXECUTE (self, req);
932 req->result = -1;
933 break;
934 }
935
936 req->errorno = errno;
937 1814
938 X_LOCK (reslock); 1815 X_LOCK (reslock);
939 1816
940 ++npending; 1817 ++npending;
941 1818
942 if (!reqq_push (&res_queue, req) && want_poll_cb) 1819 if (!reqq_push (&res_queue, req) && want_poll_cb)
943 want_poll_cb (); 1820 want_poll_cb ();
944 1821
945 self->req = 0;
946 worker_clear (self); 1822 etp_worker_clear (self);
947 1823
948 X_UNLOCK (reslock); 1824 X_UNLOCK (reslock);
949 } 1825 }
950 1826
951quit: 1827quit:
1828 free (req);
1829
952 X_LOCK (wrklock); 1830 X_LOCK (wrklock);
953 worker_free (self); 1831 etp_worker_free (self);
954 X_UNLOCK (wrklock); 1832 X_UNLOCK (wrklock);
955 1833
956 return 0; 1834 return 0;
957} 1835}
958 1836
959/*****************************************************************************/ 1837/*****************************************************************************/
960 1838
961static void eio_atfork_prepare (void) 1839int ecb_cold
962{
963 X_LOCK (wrklock);
964 X_LOCK (reqlock);
965 X_LOCK (reslock);
966#if !HAVE_PREADWRITE
967 X_LOCK (preadwritelock);
968#endif
969#if !HAVE_READDIR_R
970 X_LOCK (readdirlock);
971#endif
972}
973
974static void eio_atfork_parent (void)
975{
976#if !HAVE_READDIR_R
977 X_UNLOCK (readdirlock);
978#endif
979#if !HAVE_PREADWRITE
980 X_UNLOCK (preadwritelock);
981#endif
982 X_UNLOCK (reslock);
983 X_UNLOCK (reqlock);
984 X_UNLOCK (wrklock);
985}
986
987static void eio_atfork_child (void)
988{
989 eio_req *prv;
990
991 while (prv = reqq_shift (&req_queue))
992 eio_destroy (prv);
993
994 while (prv = reqq_shift (&res_queue))
995 eio_destroy (prv);
996
997 while (wrk_first.next != &wrk_first)
998 {
999 worker *wrk = wrk_first.next;
1000
1001 if (wrk->req)
1002 eio_destroy (wrk->req);
1003
1004 worker_clear (wrk);
1005 worker_free (wrk);
1006 }
1007
1008 started = 0;
1009 idle = 0;
1010 nreqs = 0;
1011 nready = 0;
1012 npending = 0;
1013
1014 eio_atfork_parent ();
1015}
1016
1017int eio_init (void (*want_poll)(void), void (*done_poll)(void)) 1840eio_init (void (*want_poll)(void), void (*done_poll)(void))
1018{ 1841{
1019 want_poll_cb = want_poll; 1842 return etp_init (want_poll, done_poll);
1020 done_poll_cb = done_poll;
1021
1022#ifdef _WIN32
1023 X_MUTEX_CHECK (wrklock);
1024 X_MUTEX_CHECK (reslock);
1025 X_MUTEX_CHECK (reqlock);
1026 X_MUTEX_CHECK (reqwait);
1027 X_MUTEX_CHECK (preadwritelock);
1028 X_MUTEX_CHECK (readdirlock);
1029
1030 X_COND_CHECK (reqwait);
1031#endif
1032
1033 X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);
1034} 1843}
1035 1844
1845ecb_inline void
1036static void eio_api_destroy (eio_req *req) 1846eio_api_destroy (eio_req *req)
1037{ 1847{
1038 free (req); 1848 free (req);
1039} 1849}
1040 1850
1041#define REQ(rtype) \ 1851#define REQ(rtype) \
1042 eio_req *req; \ 1852 eio_req *req; \
1043 \ 1853 \
1044 req = (eio_req *)calloc (1, sizeof *req); \ 1854 req = (eio_req *)calloc (1, sizeof *req); \
1045 if (!req) \ 1855 if (!req) \
1046 return 0; \ 1856 return 0; \
1047 \ 1857 \
1048 req->type = EIO_ ## rtype; \ 1858 req->type = rtype; \
1049 req->pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \ 1859 req->pri = pri; \
1050 req->finish = cb; \ 1860 req->finish = cb; \
1861 req->data = data; \
1051 req->destroy = eio_api_destroy; 1862 req->destroy = eio_api_destroy;
1052 1863
1053#define SEND eio_submit (req); return req 1864#define SEND eio_submit (req); return req
1054 1865
1055#define PATH (void)0 1866#define PATH \
1867 req->flags |= EIO_FLAG_PTR1_FREE; \
1868 req->ptr1 = strdup (path); \
1869 if (!req->ptr1) \
1870 { \
1871 eio_api_destroy (req); \
1872 return 0; \
1873 }
1056 1874
1875#define SINGLEDOT(ptr) (0[(char *)(ptr)] == '.' && !1[(char *)(ptr)])
1876
1877static void
1878eio_execute (etp_worker *self, eio_req *req)
1879{
1880#if HAVE_AT
1881 int dirfd;
1882#else
1883 const char *path;
1884#endif
1885
1886 if (ecb_expect_false (EIO_CANCELLED (req)))
1887 {
1888 req->result = -1;
1889 req->errorno = ECANCELED;
1890 return;
1891 }
1892
1893 if (ecb_expect_false (req->wd == EIO_INVALID_WD))
1894 {
1895 req->result = -1;
1896 req->errorno = ENOENT;
1897 return;
1898 }
1899
1900 if (req->type >= EIO_OPEN)
1901 {
1902 #if HAVE_AT
1903 dirfd = WD2FD (req->wd);
1904 #else
1905 path = wd_expand (&self->tmpbuf, req->wd, req->ptr1);
1906 #endif
1907 }
1908
1909 switch (req->type)
1910 {
1911 case EIO_WD_OPEN: req->wd = eio__wd_open_sync (&self->tmpbuf, req->wd, req->ptr1);
1912 req->result = req->wd == EIO_INVALID_WD ? -1 : 0;
1913 break;
1914 case EIO_WD_CLOSE: req->result = 0;
1915 eio_wd_close_sync (req->wd); break;
1916
1917 case EIO_SEEK: eio__lseek (req); break;
1918 case EIO_READ: ALLOC (req->size);
1919 req->result = req->offs >= 0
1920 ? pread (req->int1, req->ptr2, req->size, req->offs)
1921 : read (req->int1, req->ptr2, req->size); break;
1922 case EIO_WRITE: req->result = req->offs >= 0
1923 ? pwrite (req->int1, req->ptr2, req->size, req->offs)
1924 : write (req->int1, req->ptr2, req->size); break;
1925
1926 case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1927 case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size); break;
1928
1929#if HAVE_AT
1930
1931 case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1932 req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, 0); break;
1933 case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1934 req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, AT_SYMLINK_NOFOLLOW); break;
1935 case EIO_CHOWN: req->result = fchownat (dirfd, req->ptr1, req->int2, req->int3, 0); break;
1936 case EIO_CHMOD: req->result = fchmodat (dirfd, req->ptr1, (mode_t)req->int2, 0); break;
1937 case EIO_TRUNCATE: req->result = eio__truncateat (dirfd, req->ptr1, req->offs); break;
1938 case EIO_OPEN: req->result = openat (dirfd, req->ptr1, req->int1, (mode_t)req->int2); break;
1939
1940 case EIO_UNLINK: req->result = unlinkat (dirfd, req->ptr1, 0); break;
1941 case EIO_RMDIR: /* complications arise because "." cannot be removed, so we might have to expand */
1942 req->result = req->wd && SINGLEDOT (req->ptr1)
1943 ? rmdir (req->wd->str)
1944 : unlinkat (dirfd, req->ptr1, AT_REMOVEDIR); break;
1945 case EIO_MKDIR: req->result = mkdirat (dirfd, req->ptr1, (mode_t)req->int2); break;
1946 case EIO_RENAME: /* complications arise because "." cannot be renamed, so we might have to expand */
1947 req->result = req->wd && SINGLEDOT (req->ptr1)
1948 ? rename (req->wd->str, req->ptr2)
1949 : renameat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2); break;
1950 case EIO_LINK: req->result = linkat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2, 0); break;
1951 case EIO_SYMLINK: req->result = symlinkat (req->ptr1, dirfd, req->ptr2); break;
1952 case EIO_MKNOD: req->result = mknodat (dirfd, req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
1953 case EIO_READLINK: ALLOC (PATH_MAX);
1954 req->result = readlinkat (dirfd, req->ptr1, req->ptr2, PATH_MAX); break;
1955 case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
1956 req->result = eio__statvfsat (dirfd, req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
1957 case EIO_UTIME:
1958 case EIO_FUTIME:
1959 {
1960 struct timespec ts[2];
1961 struct timespec *times;
1962
1963 if (req->nv1 != -1. || req->nv2 != -1.)
1964 {
1965 ts[0].tv_sec = req->nv1;
1966 ts[0].tv_nsec = (req->nv1 - ts[0].tv_sec) * 1e9;
1967 ts[1].tv_sec = req->nv2;
1968 ts[1].tv_nsec = (req->nv2 - ts[1].tv_sec) * 1e9;
1969
1970 times = ts;
1971 }
1972 else
1973 times = 0;
1974
1975 req->result = req->type == EIO_FUTIME
1976 ? futimens (req->int1, times)
1977 : utimensat (dirfd, req->ptr1, times, 0);
1978 }
1979 break;
1980
1981#else
1982
1983 case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1984 req->result = stat (path , (EIO_STRUCT_STAT *)req->ptr2); break;
1985 case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1986 req->result = lstat (path , (EIO_STRUCT_STAT *)req->ptr2); break;
1987 case EIO_CHOWN: req->result = chown (path , req->int2, req->int3); break;
1988 case EIO_CHMOD: req->result = chmod (path , (mode_t)req->int2); break;
1989 case EIO_TRUNCATE: req->result = truncate (path , req->offs); break;
1990 case EIO_OPEN: req->result = open (path , req->int1, (mode_t)req->int2); break;
1991
1992 case EIO_UNLINK: req->result = unlink (path ); break;
1993 case EIO_RMDIR: req->result = rmdir (path ); break;
1994 case EIO_MKDIR: req->result = mkdir (path , (mode_t)req->int2); break;
1995 case EIO_RENAME: req->result = rename (path , req->ptr2); break;
1996 case EIO_LINK: req->result = link (path , req->ptr2); break;
1997 case EIO_SYMLINK: req->result = symlink (path , req->ptr2); break;
1998 case EIO_MKNOD: req->result = mknod (path , (mode_t)req->int2, (dev_t)req->offs); break;
1999 case EIO_READLINK: ALLOC (PATH_MAX);
2000 req->result = readlink (path, req->ptr2, PATH_MAX); break;
2001 case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
2002 req->result = statvfs (path , (EIO_STRUCT_STATVFS *)req->ptr2); break;
2003
2004 case EIO_UTIME:
2005 case EIO_FUTIME:
2006 {
2007 struct timeval tv[2];
2008 struct timeval *times;
2009
2010 if (req->nv1 != -1. || req->nv2 != -1.)
2011 {
2012 tv[0].tv_sec = req->nv1;
2013 tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1e6;
2014 tv[1].tv_sec = req->nv2;
2015 tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1e6;
2016
2017 times = tv;
2018 }
2019 else
2020 times = 0;
2021
2022 req->result = req->type == EIO_FUTIME
2023 ? futimes (req->int1, times)
2024 : utimes (req->ptr1, times);
2025 }
2026 break;
2027
2028#endif
2029
2030 case EIO_REALPATH: if (0 <= (req->result = eio__realpath (&self->tmpbuf, req->wd, req->ptr1)))
2031 {
2032 ALLOC (req->result);
2033 memcpy (req->ptr2, self->tmpbuf.ptr, req->result);
2034 }
2035 break;
2036
2037 case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2038 req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
2039
2040 case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
2041 req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
2042
2043 case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
2044 case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
2045 case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
2046
2047 case EIO_CLOSE: req->result = close (req->int1); break;
2048 case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
2049 case EIO_SYNC: req->result = 0; sync (); break;
2050 case EIO_FSYNC: req->result = fsync (req->int1); break;
2051 case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
2052 case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break;
2053 case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
2054 case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
2055 case EIO_MTOUCH: req->result = eio__mtouch (req); break;
2056 case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
2057 case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
2058 case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;
2059
2060 case EIO_READDIR: eio__scandir (req, self); break;
2061
2062 case EIO_BUSY:
2063#ifdef _WIN32
2064 Sleep (req->nv1 * 1e3);
2065#else
2066 {
2067 struct timeval tv;
2068
2069 tv.tv_sec = req->nv1;
2070 tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6;
2071
2072 req->result = select (0, 0, 0, 0, &tv);
2073 }
2074#endif
2075 break;
2076
2077 case EIO_GROUP:
2078 abort (); /* handled in eio_request */
2079
2080 case EIO_NOP:
2081 req->result = 0;
2082 break;
2083
2084 case EIO_CUSTOM:
2085 req->feed (req);
2086 break;
2087
2088 default:
2089 req->result = EIO_ENOSYS ();
2090 break;
2091 }
2092
2093 req->errorno = errno;
2094}
2095
2096#ifndef EIO_NO_WRAPPERS
2097
2098eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data)
2099{
2100 REQ (EIO_WD_OPEN); PATH; SEND;
2101}
2102
2103eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data)
2104{
2105 REQ (EIO_WD_CLOSE); req->wd = wd; SEND;
2106}
2107
2108eio_req *eio_nop (int pri, eio_cb cb, void *data)
2109{
2110 REQ (EIO_NOP); SEND;
2111}
2112
2113eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
2114{
2115 REQ (EIO_BUSY); req->nv1 = delay; SEND;
2116}
2117
1057eio_req *eio_fsync (int fd, eio_cb cb) 2118eio_req *eio_sync (int pri, eio_cb cb, void *data)
1058{ 2119{
2120 REQ (EIO_SYNC); SEND;
2121}
2122
2123eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
2124{
1059 REQ (FSYNC); req->int1 = fd; SEND; 2125 REQ (EIO_FSYNC); req->int1 = fd; SEND;
1060} 2126}
1061 2127
2128eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
2129{
2130 REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
2131}
2132
1062eio_req *eio_fdatasync (int fd, eio_cb cb) 2133eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1063{ 2134{
1064 REQ (FDATASYNC); req->int1 = fd; SEND; 2135 REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
1065} 2136}
1066 2137
2138eio_req *eio_syncfs (int fd, int pri, eio_cb cb, void *data)
2139{
2140 REQ (EIO_SYNCFS); req->int1 = fd; SEND;
2141}
2142
2143eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
2144{
2145 REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
2146}
2147
2148eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
2149{
2150 REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
2151}
2152
2153eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data)
2154{
2155 REQ (EIO_MLOCK); req->ptr2 = addr; req->size = length; SEND;
2156}
2157
2158eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)
2159{
2160 REQ (EIO_MLOCKALL); req->int1 = flags; SEND;
2161}
2162
2163eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)
2164{
2165 REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;
2166}
2167
2168eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
2169{
2170 REQ (EIO_CLOSE); req->int1 = fd; SEND;
2171}
2172
1067eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb) 2173eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
1068{ 2174{
1069 REQ (READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND; 2175 REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
1070} 2176}
1071 2177
1072eio_req *eio_read (int fd, off_t offset, size_t length, void *data, eio_cb cb) 2178eio_req *eio_seek (int fd, off_t offset, int whence, int pri, eio_cb cb, void *data)
1073{ 2179{
2180 REQ (EIO_SEEK); req->int1 = fd; req->offs = offset; req->int2 = whence; SEND;
2181}
2182
2183eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
2184{
1074 REQ (READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND; 2185 REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1075} 2186}
1076 2187
1077eio_req *eio_write (int fd, off_t offset, size_t length, void *data, eio_cb cb) 2188eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
1078{ 2189{
1079 REQ (WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND; 2190 REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1080} 2191}
1081 2192
1082eio_req *eio_fstat (int fd, eio_cb cb) 2193eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
1083{ 2194{
1084 REQ (FSTAT); req->int1 = fd; SEND; 2195 REQ (EIO_FSTAT); req->int1 = fd; SEND;
1085} 2196}
1086 2197
2198eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data)
2199{
2200 REQ (EIO_FSTATVFS); req->int1 = fd; SEND;
2201}
2202
1087eio_req *eio_futime (int fd, double atime, double mtime, eio_cb cb) 2203eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
1088{ 2204{
1089 REQ (FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND; 2205 REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
1090} 2206}
1091 2207
1092eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb) 2208eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
1093{ 2209{
1094 REQ (FTRUNCATE); req->int1 = fd; req->offs = offset; SEND; 2210 REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
1095} 2211}
1096 2212
1097eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb) 2213eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
1098{ 2214{
1099 REQ (FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND; 2215 REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
1100} 2216}
1101 2217
1102eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb) 2218eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
1103{ 2219{
1104 REQ (FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND; 2220 REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1105} 2221}
1106 2222
1107eio_req *eio_dup2 (int fd, int fd2, eio_cb cb) 2223eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
1108{ 2224{
1109 REQ (DUP2); req->int1 = fd; req->int2 = fd2; SEND; 2225 REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
1110} 2226}
1111 2227
1112eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb) 2228eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data)
1113{ 2229{
1114 REQ (SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND; 2230 REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
1115} 2231}
1116 2232
1117eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb) 2233eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
1118{ 2234{
1119 REQ (OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND; 2235 REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
1120} 2236}
1121 2237
1122eio_req *eio_readlink (const char *path, eio_cb cb)
1123{
1124 REQ (READLINK); PATH; SEND;
1125}
1126
1127eio_req *eio_stat (const char *path, eio_cb cb)
1128{
1129 REQ (STAT); PATH; SEND;
1130}
1131
1132eio_req *eio_lstat (const char *path, eio_cb cb)
1133{
1134 REQ (LSTAT); PATH; SEND;
1135}
1136
1137eio_req *eio_utime (const char *path, double atime, double mtime, eio_cb cb) 2238eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
1138{ 2239{
1139 REQ (UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND; 2240 REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
1140} 2241}
1141 2242
1142eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb) 2243eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
1143{ 2244{
1144 REQ (TRUNCATE); PATH; req->offs = offset; SEND; 2245 REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
1145} 2246}
1146 2247
1147eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb) 2248eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
1148{ 2249{
1149 REQ (CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND; 2250 REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1150} 2251}
1151 2252
1152eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb) 2253eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1153{ 2254{
1154 REQ (CHMOD); PATH; req->int2 = (long)mode; SEND; 2255 REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
1155} 2256}
1156 2257
1157eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb) 2258eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1158{ 2259{
1159 REQ (MKDIR); PATH; req->int2 = (long)mode; SEND; 2260 REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
1160} 2261}
1161 2262
1162eio_req *eio_unlink (const char *path, eio_cb cb) 2263static eio_req *
2264eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
1163{ 2265{
1164 REQ (UNLINK); PATH; SEND;
1165}
1166
1167eio_req *eio_rmdir (const char *path, eio_cb cb)
1168{
1169 REQ (RMDIR); PATH; SEND; 2266 REQ (type); PATH; SEND;
1170} 2267}
1171 2268
2269eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
2270{
2271 return eio__1path (EIO_READLINK, path, pri, cb, data);
2272}
2273
2274eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data)
2275{
2276 return eio__1path (EIO_REALPATH, path, pri, cb, data);
2277}
2278
2279eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
2280{
2281 return eio__1path (EIO_STAT, path, pri, cb, data);
2282}
2283
2284eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
2285{
2286 return eio__1path (EIO_LSTAT, path, pri, cb, data);
2287}
2288
2289eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data)
2290{
2291 return eio__1path (EIO_STATVFS, path, pri, cb, data);
2292}
2293
2294eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
2295{
2296 return eio__1path (EIO_UNLINK, path, pri, cb, data);
2297}
2298
1172eio_req *eio_readdir (const char *path, eio_cb cb) 2299eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
1173{ 2300{
1174 REQ (READDIR); PATH; SEND; 2301 return eio__1path (EIO_RMDIR, path, pri, cb, data);
1175} 2302}
1176 2303
2304eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data)
2305{
2306 REQ (EIO_READDIR); PATH; req->int1 = flags; SEND;
2307}
2308
1177eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb) 2309eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
1178{ 2310{
1179 REQ (MKNOD); PATH; req->int2 = (long)mode; req->int2 = (long)dev; SEND; 2311 REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND;
1180} 2312}
1181 2313
1182eio_req *eio_busy (double delay, eio_cb cb) 2314static eio_req *
2315eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1183{ 2316{
1184 REQ (BUSY); req->nv1 = delay; SEND; 2317 REQ (type); PATH;
1185}
1186 2318
2319 req->flags |= EIO_FLAG_PTR2_FREE;
2320 req->ptr2 = strdup (new_path);
2321 if (!req->ptr2)
2322 {
2323 eio_api_destroy (req);
2324 return 0;
2325 }
2326
2327 SEND;
2328}
2329
2330eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
2331{
2332 return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
2333}
2334
2335eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
2336{
2337 return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
2338}
2339
2340eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
2341{
2342 return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
2343}
2344
2345eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data)
2346{
2347 REQ (EIO_CUSTOM); req->feed = execute; SEND;
2348}
2349
2350#endif
2351
1187eio_req *eio_nop (eio_cb cb) 2352eio_req *eio_grp (eio_cb cb, void *data)
1188{ 2353{
2354 const int pri = EIO_PRI_MAX;
2355
1189 REQ (NOP); SEND; 2356 REQ (EIO_GROUP); SEND;
1190} 2357}
1191 2358
1192#undef REQ 2359#undef REQ
1193#undef PATH 2360#undef PATH
1194#undef SEND 2361#undef SEND
1195 2362
1196#if 0 2363/*****************************************************************************/
2364/* grp functions */
1197 2365
1198void 2366void
1199aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1200 PROTOTYPE: $$$;$
1201 PPCODE:
1202{
1203 dREQ;
1204
1205 req->type = EIO_OPEN;
1206 req->sv1 = newSVsv (pathname);
1207 req->ptr1 = SvPVbyte_nolen (req->sv1);
1208 req->int1 = flags;
1209 req->int2 = mode;
1210
1211 EIO_SEND;
1212}
1213
1214void
1215aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1216 PROTOTYPE: $;$
1217 ALIAS:
1218 aio_fsync = EIO_FSYNC
1219 aio_fdatasync = EIO_FDATASYNC
1220 PPCODE:
1221{
1222 dREQ;
1223
1224 req->type = ix;
1225 req->sv1 = newSVsv (fh);
1226 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1227
1228 EIO_SEND (req);
1229}
1230
1231void
1232aio_close (SV *fh, SV *callback=&PL_sv_undef)
1233 PROTOTYPE: $;$
1234 PPCODE:
1235{
1236 dREQ;
1237
1238 req->type = EIO_CLOSE;
1239 req->sv1 = newSVsv (fh);
1240 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1241
1242 EIO_SEND (req);
1243}
1244
1245void
1246aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1247 ALIAS:
1248 aio_read = EIO_READ
1249 aio_write = EIO_WRITE
1250 PROTOTYPE: $$$$$;$
1251 PPCODE:
1252{
1253 STRLEN svlen;
1254 char *svptr = SvPVbyte (data, svlen);
1255 UV len = SvUV (length);
1256
1257 SvUPGRADE (data, SVt_PV);
1258 SvPOK_on (data);
1259
1260 if (dataoffset < 0)
1261 dataoffset += svlen;
1262
1263 if (dataoffset < 0 || dataoffset > svlen)
1264 croak ("dataoffset outside of data scalar");
1265
1266 if (ix == EIO_WRITE)
1267 {
1268 /* write: check length and adjust. */
1269 if (!SvOK (length) || len + dataoffset > svlen)
1270 len = svlen - dataoffset;
1271 }
1272 else
1273 {
1274 /* read: grow scalar as necessary */
1275 svptr = SvGROW (data, len + dataoffset + 1);
1276 }
1277
1278 if (len < 0)
1279 croak ("length must not be negative");
1280
1281 {
1282 dREQ;
1283
1284 req->type = ix;
1285 req->sv1 = newSVsv (fh);
1286 req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1287 : IoOFP (sv_2io (fh)));
1288 req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1289 req->size = len;
1290 req->sv2 = SvREFCNT_inc (data);
1291 req->ptr2 = (char *)svptr + dataoffset;
1292 req->stroffset = dataoffset;
1293
1294 if (!SvREADONLY (data))
1295 {
1296 SvREADONLY_on (data);
1297 req->flags |= FLAG_SV2_RO_OFF;
1298 }
1299
1300 EIO_SEND;
1301 }
1302}
1303
1304void
1305aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1306 PROTOTYPE: $$;$
1307 PPCODE:
1308{
1309 SV *data;
1310 dREQ;
1311
1312 data = newSV (NAME_MAX);
1313 SvPOK_on (data);
1314
1315 req->type = EIO_READLINK;
1316 req->sv1 = newSVsv (path);
1317 req->ptr1 = SvPVbyte_nolen (req->sv1);
1318 req->sv2 = data;
1319 req->ptr2 = SvPVbyte_nolen (data);
1320
1321 EIO_SEND;
1322}
1323
1324void
1325aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1326 PROTOTYPE: $$$$;$
1327 PPCODE:
1328{
1329 dREQ;
1330
1331 req->type = EIO_SENDFILE;
1332 req->sv1 = newSVsv (out_fh);
1333 req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1334 req->sv2 = newSVsv (in_fh);
1335 req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1336 req->offs = SvVAL64 (in_offset);
1337 req->size = length;
1338
1339 EIO_SEND;
1340}
1341
1342void
1343aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1344 PROTOTYPE: $$$;$
1345 PPCODE:
1346{
1347 dREQ;
1348
1349 req->type = EIO_READAHEAD;
1350 req->sv1 = newSVsv (fh);
1351 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1352 req->offs = SvVAL64 (offset);
1353 req->size = length;
1354
1355 EIO_SEND;
1356}
1357
1358void
1359aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1360 ALIAS:
1361 aio_stat = EIO_STAT
1362 aio_lstat = EIO_LSTAT
1363 PPCODE:
1364{
1365 dREQ;
1366
1367 req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1368 if (!req->ptr2)
1369 {
1370 req_destroy (req);
1371 croak ("out of memory during aio_stat statdata allocation");
1372 }
1373
1374 req->flags |= FLAG_PTR2_FREE;
1375 req->sv1 = newSVsv (fh_or_path);
1376
1377 if (SvPOK (fh_or_path))
1378 {
1379 req->type = ix;
1380 req->ptr1 = SvPVbyte_nolen (req->sv1);
1381 }
1382 else
1383 {
1384 req->type = EIO_FSTAT;
1385 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1386 }
1387
1388 EIO_SEND;
1389}
1390
1391void
1392aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
1393 PPCODE:
1394{
1395 dREQ;
1396
1397 req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1398 req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1399 req->sv1 = newSVsv (fh_or_path);
1400
1401 if (SvPOK (fh_or_path))
1402 {
1403 req->type = EIO_UTIME;
1404 req->ptr1 = SvPVbyte_nolen (req->sv1);
1405 }
1406 else
1407 {
1408 req->type = EIO_FUTIME;
1409 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1410 }
1411
1412 EIO_SEND;
1413}
1414
1415void
1416aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
1417 PPCODE:
1418{
1419 dREQ;
1420
1421 req->sv1 = newSVsv (fh_or_path);
1422 req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1423
1424 if (SvPOK (fh_or_path))
1425 {
1426 req->type = EIO_TRUNCATE;
1427 req->ptr1 = SvPVbyte_nolen (req->sv1);
1428 }
1429 else
1430 {
1431 req->type = EIO_FTRUNCATE;
1432 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1433 }
1434
1435 EIO_SEND;
1436}
1437
1438void
1439aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
1440 ALIAS:
1441 aio_chmod = EIO_CHMOD
1442 aio_fchmod = EIO_FCHMOD
1443 aio_mkdir = EIO_MKDIR
1444 PPCODE:
1445{
1446 dREQ;
1447
1448 req->type = type;
1449 req->int2 = mode;
1450 req->sv1 = newSVsv (fh_or_path);
1451
1452 if (ix == EIO_FCHMOD)
1453 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1454 else
1455 req->ptr1 = SvPVbyte_nolen (req->sv1);
1456
1457 EIO_SEND;
1458}
1459
1460void
1461aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
1462 PPCODE:
1463{
1464 dREQ;
1465
1466 req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1467 req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1468 req->sv1 = newSVsv (fh_or_path);
1469
1470 if (SvPOK (fh_or_path))
1471 {
1472 req->type = EIO_CHOWN;
1473 req->ptr1 = SvPVbyte_nolen (req->sv1);
1474 }
1475 else
1476 {
1477 req->type = EIO_FCHOWN;
1478 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1479 }
1480
1481 EIO_SEND;
1482}
1483
1484void
1485aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1486 ALIAS:
1487 aio_unlink = EIO_UNLINK
1488 aio_rmdir = EIO_RMDIR
1489 aio_readdir = EIO_READDIR
1490 PPCODE:
1491{
1492 dREQ;
1493
1494 req->type = ix;
1495 req->sv1 = newSVsv (pathname);
1496 req->ptr1 = SvPVbyte_nolen (req->sv1);
1497
1498 EIO_SEND;
1499}
1500
1501void
1502aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1503 ALIAS:
1504 aio_link = EIO_LINK
1505 aio_symlink = EIO_SYMLINK
1506 aio_rename = EIO_RENAME
1507 PPCODE:
1508{
1509 dREQ;
1510
1511 req->type = ix;
1512 req->sv1 = newSVsv (oldpath);
1513 req->ptr1 = SvPVbyte_nolen (req->sv1);
1514 req->sv2 = newSVsv (newpath);
1515 req->ptr2 = SvPVbyte_nolen (req->sv2);
1516
1517 EIO_SEND;
1518}
1519
1520void
1521aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1522 PPCODE:
1523{
1524 dREQ;
1525
1526 req->type = EIO_MKNOD;
1527 req->sv1 = newSVsv (pathname);
1528 req->ptr1 = SvPVbyte_nolen (req->sv1);
1529 req->int2 = (mode_t)mode;
1530 req->offs = dev;
1531
1532 EIO_SEND;
1533}
1534
1535void
1536aio_busy (double delay, SV *callback=&PL_sv_undef)
1537 PPCODE:
1538{
1539 dREQ;
1540
1541 req->type = EIO_BUSY;
1542 req->nv1 = delay < 0. ? 0. : delay;
1543
1544 EIO_SEND;
1545}
1546
1547void
1548aio_group (SV *callback=&PL_sv_undef)
1549 PROTOTYPE: ;$
1550 PPCODE:
1551{
1552 dREQ;
1553
1554 req->type = EIO_GROUP;
1555
1556 req_send (req);
1557 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1558}
1559
1560void
1561aio_nop (SV *callback=&PL_sv_undef)
1562 ALIAS:
1563 aio_nop = EIO_NOP
1564 aio_sync = EIO_SYNC
1565 PPCODE:
1566{
1567 dREQ;
1568
1569#endif
1570
1571void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit) 2367eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1572{ 2368{
1573 grp->int2 = limit; 2369 grp->int2 = limit;
1574 grp->feed = feed; 2370 grp->feed = feed;
1575 2371
1576 grp_try_feed (grp); 2372 grp_try_feed (grp);
1577} 2373}
1578 2374
2375void
1579void eio_grp_limit (eio_req *grp, int limit) 2376eio_grp_limit (eio_req *grp, int limit)
1580{ 2377{
1581 grp->int2 = limit; 2378 grp->int2 = limit;
1582 2379
1583 grp_try_feed (grp); 2380 grp_try_feed (grp);
1584} 2381}
1585 2382
2383void
1586void eio_grp_add (eio_req *grp, eio_req *req) 2384eio_grp_add (eio_req *grp, eio_req *req)
1587{ 2385{
1588 assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2)); 2386 assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
2387
2388 grp->flags |= EIO_FLAG_GROUPADD;
1589 2389
1590 ++grp->size; 2390 ++grp->size;
1591 req->grp = grp; 2391 req->grp = grp;
1592 2392
1593 req->grp_prev = 0; 2393 req->grp_prev = 0;
… …
1597 grp->grp_first->grp_prev = req; 2397 grp->grp_first->grp_prev = req;
1598 2398
1599 grp->grp_first = req; 2399 grp->grp_first = req;
1600} 2400}
1601 2401
2402/*****************************************************************************/
2403/* misc garbage */
1602 2404
2405eio_ssize_t
2406eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
2407{
2408 return eio__sendfile (ofd, ifd, offset, count);
2409}
2410

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