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Comparing libeio/eio.c (file contents):
Revision 1.2 by root, Sat May 10 23:33:40 2008 UTC vs.
Revision 1.110 by root, Tue Sep 27 12:36:19 2011 UTC

1/*
2 * libeio implementation
3 *
4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libeio@schmorp.de>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
38 */
39
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
6#include "EXTERN.h"
7#include "perl.h"
8#include "XSUB.h"
9
10#include <stddef.h> 53#include <stddef.h>
11#include <stdlib.h> 54#include <stdlib.h>
55#include <string.h>
12#include <errno.h> 56#include <errno.h>
13#include <sys/types.h> 57#include <sys/types.h>
14#include <sys/stat.h> 58#include <sys/stat.h>
15#include <limits.h> 59#include <limits.h>
16#include <fcntl.h> 60#include <fcntl.h>
17#include <sched.h> 61#include <assert.h>
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);
18 81
19#ifndef EIO_FINISH 82#ifndef EIO_FINISH
20# 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
21#endif 84#endif
22 85
… …
26 89
27#ifndef EIO_FEED 90#ifndef EIO_FEED
28# 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)
29#endif 92#endif
30 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
31#ifdef _WIN32 105#ifdef _WIN32
32 106
33 /*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 /* rename() uses MoveFile, which fails to overwrite */
138 #define rename(old,neu) eio__rename (old, neu)
139
140 static int
141 eio__rename (const char *old, const char *neu)
142 {
143 if (MoveFileEx (old, neu, MOVEFILE_REPLACE_EXISTING))
144 return 0;
145
146 /* should steal _dosmaperr */
147 switch (GetLastError ())
148 {
149 case ERROR_FILE_NOT_FOUND:
150 case ERROR_PATH_NOT_FOUND:
151 case ERROR_INVALID_DRIVE:
152 case ERROR_NO_MORE_FILES:
153 case ERROR_BAD_NETPATH:
154 case ERROR_BAD_NET_NAME:
155 case ERROR_BAD_PATHNAME:
156 case ERROR_FILENAME_EXCED_RANGE:
157 errno = ENOENT;
158 break;
159
160 default:
161 errno = EACCES;
162 break;
163 }
164
165 return -1;
166 }
167
168 /* we could even stat and see if it exists */
169 static int
170 symlink (const char *old, const char *neu)
171 {
172 #if WINVER >= 0x0600
173 if (CreateSymbolicLink (neu, old, 1))
174 return 0;
175
176 if (CreateSymbolicLink (neu, old, 0))
177 return 0;
178 #endif
179
180 return EIO_ERRNO (ENOENT, -1);
181 }
182
183 /* POSIX API only */
184 #define CreateHardLink(neu,old,flags) 0
185 #define CreateSymbolicLink(neu,old,flags) 0
186
187 struct statvfs
188 {
189 int dummy;
190 };
191
192 #define DT_DIR EIO_DT_DIR
193 #define DT_REG EIO_DT_REG
194 #define D_NAME(entp) entp.cFileName
195 #define D_TYPE(entp) (entp.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ? DT_DIR : DT_REG)
34 196
35#else 197#else
36 198
37# include "config.h"
38# include <sys/time.h> 199 #include <sys/time.h>
39# include <sys/select.h> 200 #include <sys/select.h>
201 #include <sys/statvfs.h>
40# include <unistd.h> 202 #include <unistd.h>
203 #include <signal.h>
204 #include <dirent.h>
205
206 #if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
207 #include <sys/mman.h>
208 #endif
209
210 #define D_NAME(entp) entp->d_name
211
212 /* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
213 #if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__
214 #define _DIRENT_HAVE_D_TYPE /* sigh */
215 #define D_INO(de) (de)->d_fileno
216 #define D_NAMLEN(de) (de)->d_namlen
217 #elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
218 #define D_INO(de) (de)->d_ino
219 #endif
220
221 #ifdef _D_EXACT_NAMLEN
222 #undef D_NAMLEN
223 #define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
224 #endif
225
226 #ifdef _DIRENT_HAVE_D_TYPE
227 #define D_TYPE(de) (de)->d_type
228 #endif
229
230 #ifndef EIO_STRUCT_DIRENT
231 #define EIO_STRUCT_DIRENT struct dirent
232 #endif
233
234#endif
235
236#if HAVE_UTIMES
41# include <utime.h> 237# include <utime.h>
42# include <signal.h>
43
44# ifndef EIO_STRUCT_DIRENT
45# define EIO_STRUCT_DIRENT struct dirent
46# endif 238#endif
47 239
48#endif 240#if HAVE_SYS_SYSCALL_H
49 241# include <sys/syscall.h>
50# ifndef EIO_STRUCT_STAT
51# define EIO_STRUCT_STAT struct stat
52# endif 242#endif
243
244#if HAVE_SYS_PRCTL_H
245# include <sys/prctl.h>
246#endif
53 247
54#if HAVE_SENDFILE 248#if HAVE_SENDFILE
55# if __linux 249# if __linux
56# include <sys/sendfile.h> 250# include <sys/sendfile.h>
57# elif __freebsd 251# elif __FreeBSD__ || defined __APPLE__
58# include <sys/socket.h> 252# include <sys/socket.h>
59# include <sys/uio.h> 253# include <sys/uio.h>
60# elif __hpux 254# elif __hpux
61# include <sys/socket.h> 255# include <sys/socket.h>
62# elif __solaris /* not yet */ 256# elif __solaris
63# include <sys/sendfile.h> 257# include <sys/sendfile.h>
64# else 258# else
65# error sendfile support requested but not available 259# error sendfile support requested but not available
66# endif 260# endif
67#endif 261#endif
68 262
69/* number of seconds after which an idle threads exit */ 263#ifndef D_TYPE
70#define IDLE_TIMEOUT 10 264# define D_TYPE(de) 0
265#endif
266#ifndef D_INO
267# define D_INO(de) 0
268#endif
269#ifndef D_NAMLEN
270# define D_NAMLEN(entp) strlen (D_NAME (entp))
271#endif
71 272
72/* used for struct dirent, AIX doesn't provide it */ 273/* used for struct dirent, AIX doesn't provide it */
73#ifndef NAME_MAX 274#ifndef NAME_MAX
74# define NAME_MAX 4096 275# define NAME_MAX 4096
75#endif 276#endif
76 277
278/* used for readlink etc. */
279#ifndef PATH_MAX
280# define PATH_MAX 4096
281#endif
282
77/* buffer size for various temporary buffers */ 283/* buffer size for various temporary buffers */
78#define EIO_BUFSIZE 65536 284#define EIO_BUFSIZE 65536
79 285
80#define dBUF \ 286#define dBUF \
81 char *eio_buf; \
82 X_LOCK (wrklock); \
83 self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \ 287 char *eio_buf = malloc (EIO_BUFSIZE); \
84 X_UNLOCK (wrklock); \ 288 errno = ENOMEM; \
85 if (!eio_buf) \ 289 if (!eio_buf) \
86 return -1; 290 return -1
291
292#define FUBd \
293 free (eio_buf)
87 294
88#define EIO_TICKS ((1000000 + 1023) >> 10) 295#define EIO_TICKS ((1000000 + 1023) >> 10)
296
297/*****************************************************************************/
298
299struct tmpbuf
300{
301 void *ptr;
302 int len;
303};
304
305static void *
306tmpbuf_get (struct tmpbuf *buf, int len)
307{
308 if (buf->len < len)
309 {
310 free (buf->ptr);
311 buf->ptr = malloc (buf->len = len);
312 }
313
314 return buf->ptr;
315}
316
317struct tmpbuf;
318
319#if _POSIX_VERSION >= 200809L
320 #define HAVE_AT 1
321 #define WD2FD(wd) ((wd) ? (wd)->fd : AT_FDCWD)
322 #ifndef O_SEARCH
323 #define O_SEARCH O_RDONLY
324 #endif
325#else
326 #define HAVE_AT 0
327 static const char *wd_expand (struct tmpbuf *tmpbuf, eio_wd wd, const char *path);
328#endif
329
330struct eio_pwd
331{
332#if HAVE_AT
333 int fd;
334#endif
335 int len;
336 char str[1]; /* actually, a 0-terminated canonical path */
337};
338
339/*****************************************************************************/
340
341#define ETP_PRI_MIN EIO_PRI_MIN
342#define ETP_PRI_MAX EIO_PRI_MAX
343
344struct etp_worker;
345
346#define ETP_REQ eio_req
347#define ETP_DESTROY(req) eio_destroy (req)
348static int eio_finish (eio_req *req);
349#define ETP_FINISH(req) eio_finish (req)
350static void eio_execute (struct etp_worker *self, eio_req *req);
351#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)
352
353/*****************************************************************************/
354
355#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
356
357/* calculate time difference in ~1/EIO_TICKS of a second */
358ecb_inline int
359tvdiff (struct timeval *tv1, struct timeval *tv2)
360{
361 return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
362 + ((tv2->tv_usec - tv1->tv_usec) >> 10);
363}
364
365static unsigned int started, idle, wanted = 4;
89 366
90static void (*want_poll_cb) (void); 367static void (*want_poll_cb) (void);
91static void (*done_poll_cb) (void); 368static void (*done_poll_cb) (void);
92 369
93static unsigned int max_poll_time = 0; 370static unsigned int max_poll_time; /* reslock */
94static unsigned int max_poll_reqs = 0; 371static unsigned int max_poll_reqs; /* reslock */
95 372
96/* calculcate time difference in ~1/EIO_TICKS of a second */ 373static unsigned int nreqs; /* reqlock */
97static int tvdiff (struct timeval *tv1, struct timeval *tv2) 374static unsigned int nready; /* reqlock */
98{ 375static unsigned int npending; /* reqlock */
99 return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS 376static unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */
100 + ((tv2->tv_usec - tv1->tv_usec) >> 10); 377static unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */
101}
102 378
103static unsigned int started, idle, wanted; 379static xmutex_t wrklock;
380static xmutex_t reslock;
381static xmutex_t reqlock;
382static xcond_t reqwait;
383
384#if !HAVE_PREADWRITE
385/*
386 * make our pread/pwrite emulation safe against themselves, but not against
387 * normal read/write by using a mutex. slows down execution a lot,
388 * but that's your problem, not mine.
389 */
390static xmutex_t preadwritelock;
391#endif
392
393typedef struct etp_worker
394{
395 struct tmpbuf tmpbuf;
396
397 /* locked by wrklock */
398 struct etp_worker *prev, *next;
399
400 xthread_t tid;
401
402#ifdef ETP_WORKER_COMMON
403 ETP_WORKER_COMMON
404#endif
405} etp_worker;
406
407static etp_worker wrk_first; /* NOT etp */
408
409#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
410#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
104 411
105/* worker threads management */ 412/* worker threads management */
106static mutex_t wrklock = X_MUTEX_INIT;
107 413
108typedef struct worker { 414static void
109 /* locked by wrklock */
110 struct worker *prev, *next;
111
112 thread_t tid;
113
114 /* locked by reslock, reqlock or wrklock */
115 eio_req *req; /* currently processed request */
116 void *dbuf;
117 DIR *dirp;
118} worker;
119
120static worker wrk_first = { &wrk_first, &wrk_first, 0 };
121
122static void worker_clear (worker *wrk) 415etp_worker_clear (etp_worker *wrk)
123{ 416{
124 if (wrk->dirp) 417}
125 {
126 closedir (wrk->dirp);
127 wrk->dirp = 0;
128 }
129 418
130 if (wrk->dbuf) 419static void ecb_cold
131 { 420etp_worker_free (etp_worker *wrk)
421{
132 free (wrk->dbuf); 422 free (wrk->tmpbuf.ptr);
133 wrk->dbuf = 0;
134 }
135}
136 423
137static void worker_free (worker *wrk)
138{
139 wrk->next->prev = wrk->prev; 424 wrk->next->prev = wrk->prev;
140 wrk->prev->next = wrk->next; 425 wrk->prev->next = wrk->next;
141 426
142 free (wrk); 427 free (wrk);
143} 428}
144 429
145static volatile unsigned int nreqs, nready, npending; 430static unsigned int
146static volatile unsigned int max_idle = 4; 431etp_nreqs (void)
147
148static mutex_t reslock = X_MUTEX_INIT;
149static mutex_t reqlock = X_MUTEX_INIT;
150static cond_t reqwait = X_COND_INIT;
151
152unsigned int eio_nreqs (void)
153{ 432{
433 int retval;
434 if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
435 retval = nreqs;
436 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
154 return nreqs; 437 return retval;
155} 438}
156 439
157unsigned int eio_nready (void) 440static unsigned int
441etp_nready (void)
158{ 442{
159 unsigned int retval; 443 unsigned int retval;
160 444
161 if (WORDACCESS_UNSAFE) X_LOCK (reqlock); 445 if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
162 retval = nready; 446 retval = nready;
163 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); 447 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
164 448
165 return retval; 449 return retval;
166} 450}
167 451
168unsigned int eio_npending (void) 452static unsigned int
453etp_npending (void)
169{ 454{
170 unsigned int retval; 455 unsigned int retval;
171 456
172 if (WORDACCESS_UNSAFE) X_LOCK (reqlock); 457 if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
173 retval = npending; 458 retval = npending;
174 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); 459 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
175 460
176 return retval; 461 return retval;
177} 462}
178 463
179unsigned int eio_nthreads (void) 464static unsigned int
465etp_nthreads (void)
180{ 466{
181 unsigned int retval; 467 unsigned int retval;
182 468
183 if (WORDACCESS_UNSAFE) X_LOCK (reqlock); 469 if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
184 retval = started; 470 retval = started;
… …
191 * a somewhat faster data structure might be nice, but 477 * a somewhat faster data structure might be nice, but
192 * with 8 priorities this actually needs <20 insns 478 * with 8 priorities this actually needs <20 insns
193 * per shift, the most expensive operation. 479 * per shift, the most expensive operation.
194 */ 480 */
195typedef struct { 481typedef struct {
196 eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */ 482 ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
197 int size; 483 int size;
198} reqq; 484} etp_reqq;
199 485
200static reqq req_queue; 486static etp_reqq req_queue;
201static reqq res_queue; 487static etp_reqq res_queue;
202 488
203static int reqq_push (reqq *q, eio_req *req) 489static void ecb_noinline ecb_cold
490reqq_init (etp_reqq *q)
491{
492 int pri;
493
494 for (pri = 0; pri < ETP_NUM_PRI; ++pri)
495 q->qs[pri] = q->qe[pri] = 0;
496
497 q->size = 0;
498}
499
500static int ecb_noinline
501reqq_push (etp_reqq *q, ETP_REQ *req)
204{ 502{
205 int pri = req->pri; 503 int pri = req->pri;
206 req->next = 0; 504 req->next = 0;
207 505
208 if (q->qe[pri]) 506 if (q->qe[pri])
… …
214 q->qe[pri] = q->qs[pri] = req; 512 q->qe[pri] = q->qs[pri] = req;
215 513
216 return q->size++; 514 return q->size++;
217} 515}
218 516
219static eio_req *reqq_shift (reqq *q) 517static ETP_REQ * ecb_noinline
518reqq_shift (etp_reqq *q)
220{ 519{
221 int pri; 520 int pri;
222 521
223 if (!q->size) 522 if (!q->size)
224 return 0; 523 return 0;
225 524
226 --q->size; 525 --q->size;
227 526
228 for (pri = EIO_NUM_PRI; pri--; ) 527 for (pri = ETP_NUM_PRI; pri--; )
229 { 528 {
230 eio_req *req = q->qs[pri]; 529 eio_req *req = q->qs[pri];
231 530
232 if (req) 531 if (req)
233 { 532 {
… …
239 } 538 }
240 539
241 abort (); 540 abort ();
242} 541}
243 542
244static void grp_try_feed (eio_req *grp) 543static int ecb_cold
544etp_init (void (*want_poll)(void), void (*done_poll)(void))
245{ 545{
246 while (grp->size < grp->int2 && !EIO_CANCELLED (grp)) 546 X_MUTEX_CREATE (wrklock);
247 { 547 X_MUTEX_CREATE (reslock);
248 int old_len = grp->size; 548 X_MUTEX_CREATE (reqlock);
549 X_COND_CREATE (reqwait);
249 550
250 EIO_FEED (grp); 551 reqq_init (&req_queue);
552 reqq_init (&res_queue);
251 553
252 /* stop if no progress has been made */ 554 wrk_first.next =
253 if (old_len == grp->size) 555 wrk_first.prev = &wrk_first;
254 {
255 grp->feed = 0;
256 break;
257 }
258 }
259}
260 556
261static int eio_finish (eio_req *req); 557 started = 0;
558 idle = 0;
559 nreqs = 0;
560 nready = 0;
561 npending = 0;
262 562
263static int grp_dec (eio_req *grp) 563 want_poll_cb = want_poll;
264{ 564 done_poll_cb = done_poll;
265 --grp->size;
266 565
267 /* call feeder, if applicable */
268 grp_try_feed (grp);
269
270 /* finish, if done */
271 if (!grp->size && grp->int1)
272 return eio_finish (grp);
273 else
274 return 0; 566 return 0;
275} 567}
276 568
277void eio_destroy (eio_req *req)
278{
279 if ((req)->flags & EIO_FLAG_PTR2_FREE)
280 free (req->ptr2);
281
282 EIO_DESTROY (req);
283}
284
285static int eio_finish (eio_req *req)
286{
287 int res = EIO_FINISH (req);
288
289 if (req->grp)
290 {
291 int res2;
292 eio_req *grp = req->grp;
293
294 /* unlink request */
295 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
296 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
297
298 if (grp->grp_first == req)
299 grp->grp_first = req->grp_next;
300
301 res2 = grp_dec (grp);
302
303 if (!res && res2)
304 res = res2;
305 }
306
307 eio_destroy (req);
308
309 return res;
310}
311
312void eio_grp_cancel (eio_req *grp)
313{
314 for (grp = grp->grp_first; grp; grp = grp->grp_next)
315 eio_cancel (grp);
316}
317
318void eio_cancel (eio_req *req)
319{
320 req->flags |= EIO_FLAG_CANCELLED;
321
322 eio_grp_cancel (req);
323}
324
325X_THREAD_PROC (eio_proc); 569X_THREAD_PROC (etp_proc);
326 570
327static void start_thread (void) 571static void ecb_cold
572etp_start_thread (void)
328{ 573{
329 worker *wrk = calloc (1, sizeof (worker)); 574 etp_worker *wrk = calloc (1, sizeof (etp_worker));
330 575
331 if (!wrk) 576 /*TODO*/
332 croak ("unable to allocate worker thread data"); 577 assert (("unable to allocate worker thread data", wrk));
333 578
334 X_LOCK (wrklock); 579 X_LOCK (wrklock);
335 580
336 if (thread_create (&wrk->tid, eio_proc, (void *)wrk)) 581 if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
337 { 582 {
338 wrk->prev = &wrk_first; 583 wrk->prev = &wrk_first;
339 wrk->next = wrk_first.next; 584 wrk->next = wrk_first.next;
340 wrk_first.next->prev = wrk; 585 wrk_first.next->prev = wrk;
341 wrk_first.next = wrk; 586 wrk_first.next = wrk;
… …
345 free (wrk); 590 free (wrk);
346 591
347 X_UNLOCK (wrklock); 592 X_UNLOCK (wrklock);
348} 593}
349 594
595static void
350static void maybe_start_thread (void) 596etp_maybe_start_thread (void)
351{ 597{
352 if (eio_nthreads () >= wanted) 598 if (ecb_expect_true (etp_nthreads () >= wanted))
353 return; 599 return;
354 600
355 /* todo: maybe use idle here, but might be less exact */ 601 /* todo: maybe use idle here, but might be less exact */
356 if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ()) 602 if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
357 return; 603 return;
358 604
359 start_thread (); 605 etp_start_thread ();
360} 606}
361 607
362void eio_submit (eio_req *req) 608static void ecb_cold
609etp_end_thread (void)
363{ 610{
364 ++nreqs;
365
366 X_LOCK (reqlock);
367 ++nready;
368 reqq_push (&req_queue, req);
369 X_COND_SIGNAL (reqwait);
370 X_UNLOCK (reqlock);
371
372 maybe_start_thread ();
373}
374
375static void end_thread (void)
376{
377 eio_req *req = calloc (1, sizeof (eio_req)); 611 eio_req *req = calloc (1, sizeof (eio_req)); /* will be freed by worker */
378 612
379 req->type = EIO_QUIT; 613 req->type = -1;
380 req->pri = EIO_PRI_MAX + EIO_PRI_BIAS; 614 req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
381 615
382 X_LOCK (reqlock); 616 X_LOCK (reqlock);
383 reqq_push (&req_queue, req); 617 reqq_push (&req_queue, req);
384 X_COND_SIGNAL (reqwait); 618 X_COND_SIGNAL (reqwait);
385 X_UNLOCK (reqlock); 619 X_UNLOCK (reqlock);
… …
387 X_LOCK (wrklock); 621 X_LOCK (wrklock);
388 --started; 622 --started;
389 X_UNLOCK (wrklock); 623 X_UNLOCK (wrklock);
390} 624}
391 625
392void eio_set_max_poll_time (double nseconds) 626static int
393{
394 if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
395 max_poll_time = nseconds;
396 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
397}
398
399void eio_set_max_poll_reqs (unsigned int maxreqs)
400{
401 if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
402 max_poll_reqs = maxreqs;
403 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
404}
405
406void eio_set_max_idle (unsigned int nthreads)
407{
408 if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
409 max_idle = nthreads <= 0 ? 1 : nthreads;
410 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
411}
412
413void eio_set_min_parallel (unsigned int nthreads)
414{
415 if (wanted < nthreads)
416 wanted = nthreads;
417}
418
419void eio_set_max_parallel (unsigned int nthreads)
420{
421 if (wanted > nthreads)
422 wanted = nthreads;
423
424 while (started > wanted)
425 end_thread ();
426}
427
428int eio_poll (void) 627etp_poll (void)
429{ 628{
430 int maxreqs = max_poll_reqs; 629 unsigned int maxreqs;
630 unsigned int maxtime;
431 struct timeval tv_start, tv_now; 631 struct timeval tv_start, tv_now;
432 eio_req *req;
433 632
633 X_LOCK (reslock);
634 maxreqs = max_poll_reqs;
635 maxtime = max_poll_time;
636 X_UNLOCK (reslock);
637
434 if (max_poll_time) 638 if (maxtime)
435 gettimeofday (&tv_start, 0); 639 gettimeofday (&tv_start, 0);
436 640
437 for (;;) 641 for (;;)
438 { 642 {
643 ETP_REQ *req;
644
439 maybe_start_thread (); 645 etp_maybe_start_thread ();
440 646
441 X_LOCK (reslock); 647 X_LOCK (reslock);
442 req = reqq_shift (&res_queue); 648 req = reqq_shift (&res_queue);
443 649
444 if (req) 650 if (req)
… …
452 X_UNLOCK (reslock); 658 X_UNLOCK (reslock);
453 659
454 if (!req) 660 if (!req)
455 return 0; 661 return 0;
456 662
663 X_LOCK (reqlock);
457 --nreqs; 664 --nreqs;
665 X_UNLOCK (reqlock);
458 666
459 if (req->type == EIO_GROUP && req->size) 667 if (ecb_expect_false (req->type == EIO_GROUP && req->size))
460 { 668 {
461 req->int1 = 1; /* mark request as delayed */ 669 req->int1 = 1; /* mark request as delayed */
462 continue; 670 continue;
463 } 671 }
464 else 672 else
465 { 673 {
466 int res = eio_finish (req); 674 int res = ETP_FINISH (req);
467 if (res) 675 if (ecb_expect_false (res))
468 return res; 676 return res;
469 } 677 }
470 678
471 if (maxreqs && !--maxreqs) 679 if (ecb_expect_false (maxreqs && !--maxreqs))
472 break; 680 break;
473 681
474 if (max_poll_time) 682 if (maxtime)
475 { 683 {
476 gettimeofday (&tv_now, 0); 684 gettimeofday (&tv_now, 0);
477 685
478 if (tvdiff (&tv_start, &tv_now) >= max_poll_time) 686 if (tvdiff (&tv_start, &tv_now) >= maxtime)
479 break; 687 break;
480 } 688 }
481 } 689 }
482 690
483 errno = EAGAIN; 691 errno = EAGAIN;
484 return -1; 692 return -1;
485} 693}
486 694
695static void
696etp_cancel (ETP_REQ *req)
697{
698 req->cancelled = 1;
699
700 eio_grp_cancel (req);
701}
702
703static void
704etp_submit (ETP_REQ *req)
705{
706 req->pri -= ETP_PRI_MIN;
707
708 if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
709 if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
710
711 if (ecb_expect_false (req->type == EIO_GROUP))
712 {
713 /* I hope this is worth it :/ */
714 X_LOCK (reqlock);
715 ++nreqs;
716 X_UNLOCK (reqlock);
717
718 X_LOCK (reslock);
719
720 ++npending;
721
722 if (!reqq_push (&res_queue, req) && want_poll_cb)
723 want_poll_cb ();
724
725 X_UNLOCK (reslock);
726 }
727 else
728 {
729 X_LOCK (reqlock);
730 ++nreqs;
731 ++nready;
732 reqq_push (&req_queue, req);
733 X_COND_SIGNAL (reqwait);
734 X_UNLOCK (reqlock);
735
736 etp_maybe_start_thread ();
737 }
738}
739
740static void ecb_cold
741etp_set_max_poll_time (double nseconds)
742{
743 if (WORDACCESS_UNSAFE) X_LOCK (reslock);
744 max_poll_time = nseconds * EIO_TICKS;
745 if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
746}
747
748static void ecb_cold
749etp_set_max_poll_reqs (unsigned int maxreqs)
750{
751 if (WORDACCESS_UNSAFE) X_LOCK (reslock);
752 max_poll_reqs = maxreqs;
753 if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
754}
755
756static void ecb_cold
757etp_set_max_idle (unsigned int nthreads)
758{
759 if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
760 max_idle = nthreads;
761 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
762}
763
764static void ecb_cold
765etp_set_idle_timeout (unsigned int seconds)
766{
767 if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
768 idle_timeout = seconds;
769 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
770}
771
772static void ecb_cold
773etp_set_min_parallel (unsigned int nthreads)
774{
775 if (wanted < nthreads)
776 wanted = nthreads;
777}
778
779static void ecb_cold
780etp_set_max_parallel (unsigned int nthreads)
781{
782 if (wanted > nthreads)
783 wanted = nthreads;
784
785 while (started > wanted)
786 etp_end_thread ();
787}
788
789/*****************************************************************************/
790
791static void
792grp_try_feed (eio_req *grp)
793{
794 while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
795 {
796 grp->flags &= ~EIO_FLAG_GROUPADD;
797
798 EIO_FEED (grp);
799
800 /* stop if no progress has been made */
801 if (!(grp->flags & EIO_FLAG_GROUPADD))
802 {
803 grp->feed = 0;
804 break;
805 }
806 }
807}
808
809static int
810grp_dec (eio_req *grp)
811{
812 --grp->size;
813
814 /* call feeder, if applicable */
815 grp_try_feed (grp);
816
817 /* finish, if done */
818 if (!grp->size && grp->int1)
819 return eio_finish (grp);
820 else
821 return 0;
822}
823
824static void
825eio_destroy (eio_req *req)
826{
827 if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
828 if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
829
830 EIO_DESTROY (req);
831}
832
833static int
834eio_finish (eio_req *req)
835{
836 int res = EIO_FINISH (req);
837
838 if (req->grp)
839 {
840 int res2;
841 eio_req *grp = req->grp;
842
843 /* unlink request */
844 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
845 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
846
847 if (grp->grp_first == req)
848 grp->grp_first = req->grp_next;
849
850 res2 = grp_dec (grp);
851
852 if (!res)
853 res = res2;
854 }
855
856 eio_destroy (req);
857
858 return res;
859}
860
861void
862eio_grp_cancel (eio_req *grp)
863{
864 for (grp = grp->grp_first; grp; grp = grp->grp_next)
865 eio_cancel (grp);
866}
867
868void
869eio_cancel (eio_req *req)
870{
871 etp_cancel (req);
872}
873
874void
875eio_submit (eio_req *req)
876{
877 etp_submit (req);
878}
879
880unsigned int
881eio_nreqs (void)
882{
883 return etp_nreqs ();
884}
885
886unsigned int
887eio_nready (void)
888{
889 return etp_nready ();
890}
891
892unsigned int
893eio_npending (void)
894{
895 return etp_npending ();
896}
897
898unsigned int ecb_cold
899eio_nthreads (void)
900{
901 return etp_nthreads ();
902}
903
904void ecb_cold
905eio_set_max_poll_time (double nseconds)
906{
907 etp_set_max_poll_time (nseconds);
908}
909
910void ecb_cold
911eio_set_max_poll_reqs (unsigned int maxreqs)
912{
913 etp_set_max_poll_reqs (maxreqs);
914}
915
916void ecb_cold
917eio_set_max_idle (unsigned int nthreads)
918{
919 etp_set_max_idle (nthreads);
920}
921
922void ecb_cold
923eio_set_idle_timeout (unsigned int seconds)
924{
925 etp_set_idle_timeout (seconds);
926}
927
928void ecb_cold
929eio_set_min_parallel (unsigned int nthreads)
930{
931 etp_set_min_parallel (nthreads);
932}
933
934void ecb_cold
935eio_set_max_parallel (unsigned int nthreads)
936{
937 etp_set_max_parallel (nthreads);
938}
939
940int eio_poll (void)
941{
942 return etp_poll ();
943}
944
487/*****************************************************************************/ 945/*****************************************************************************/
488/* work around various missing functions */ 946/* work around various missing functions */
489 947
490#if !HAVE_PREADWRITE 948#if !HAVE_PREADWRITE
949# undef pread
950# undef pwrite
491# define pread aio_pread 951# define pread eio__pread
492# define pwrite aio_pwrite 952# define pwrite eio__pwrite
493 953
494/* 954static eio_ssize_t
495 * make our pread/pwrite safe against themselves, but not against 955eio__pread (int fd, void *buf, size_t count, off_t offset)
496 * normal read/write by using a mutex. slows down execution a lot,
497 * but that's your problem, not mine.
498 */
499static mutex_t preadwritelock = X_MUTEX_INIT;
500
501static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
502{ 956{
503 ssize_t res; 957 eio_ssize_t res;
504 off_t ooffset; 958 off_t ooffset;
505 959
506 X_LOCK (preadwritelock); 960 X_LOCK (preadwritelock);
507 ooffset = lseek (fd, 0, SEEK_CUR); 961 ooffset = lseek (fd, 0, SEEK_CUR);
508 lseek (fd, offset, SEEK_SET); 962 lseek (fd, offset, SEEK_SET);
… …
511 X_UNLOCK (preadwritelock); 965 X_UNLOCK (preadwritelock);
512 966
513 return res; 967 return res;
514} 968}
515 969
516static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset) 970static eio_ssize_t
971eio__pwrite (int fd, void *buf, size_t count, off_t offset)
517{ 972{
518 ssize_t res; 973 eio_ssize_t res;
519 off_t ooffset; 974 off_t ooffset;
520 975
521 X_LOCK (preadwritelock); 976 X_LOCK (preadwritelock);
522 ooffset = lseek (fd, 0, SEEK_CUR); 977 ooffset = lseek (fd, 0, SEEK_CUR);
523 lseek (fd, offset, SEEK_SET); 978 lseek (fd, offset, SEEK_SET);
524 res = write (fd, buf, count); 979 res = write (fd, buf, count);
525 lseek (fd, offset, SEEK_SET); 980 lseek (fd, ooffset, SEEK_SET);
526 X_UNLOCK (preadwritelock); 981 X_UNLOCK (preadwritelock);
527 982
528 return res; 983 return res;
529} 984}
530#endif 985#endif
531 986
532#ifndef HAVE_FUTIMES 987#ifndef HAVE_UTIMES
533 988
989# undef utimes
534# define utimes(path,times) aio_utimes (path, times) 990# define utimes(path,times) eio__utimes (path, times)
535# define futimes(fd,times) aio_futimes (fd, times)
536 991
992static int
537static int aio_utimes (const char *filename, const struct timeval times[2]) 993eio__utimes (const char *filename, const struct timeval times[2])
538{ 994{
539 if (times) 995 if (times)
540 { 996 {
541 struct utimbuf buf; 997 struct utimbuf buf;
542 998
… …
547 } 1003 }
548 else 1004 else
549 return utime (filename, 0); 1005 return utime (filename, 0);
550} 1006}
551 1007
1008#endif
1009
1010#ifndef HAVE_FUTIMES
1011
1012# undef futimes
1013# define futimes(fd,times) eio__futimes (fd, times)
1014
1015static int
552static int aio_futimes (int fd, const struct timeval tv[2]) 1016eio__futimes (int fd, const struct timeval tv[2])
553{ 1017{
554 errno = ENOSYS; 1018 errno = ENOSYS;
555 return -1; 1019 return -1;
556} 1020}
557 1021
558#endif 1022#endif
559 1023
560#if !HAVE_FDATASYNC 1024#if !HAVE_FDATASYNC
1025# undef fdatasync
561# define fdatasync fsync 1026# define fdatasync(fd) fsync (fd)
562#endif 1027#endif
1028
1029static int
1030eio__syncfs (int fd)
1031{
1032 int res;
1033
1034#if HAVE_SYS_SYNCFS
1035 res = (int)syscall (__NR_syncfs, (int)(fd));
1036#else
1037 res = -1;
1038 errno = ENOSYS;
1039#endif
1040
1041 if (res < 0 && errno == ENOSYS && fd >= 0)
1042 sync ();
1043
1044 return res;
1045}
1046
1047/* sync_file_range always needs emulation */
1048static int
1049eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
1050{
1051#if HAVE_SYNC_FILE_RANGE
1052 int res;
1053
1054 if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE
1055 || EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE
1056 || EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER)
1057 {
1058 flags = 0
1059 | (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0)
1060 | (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0)
1061 | (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0);
1062 }
1063
1064 res = sync_file_range (fd, offset, nbytes, flags);
1065
1066 if (!res || errno != ENOSYS)
1067 return res;
1068#endif
1069
1070 /* even though we could play tricks with the flags, it's better to always
1071 * call fdatasync, as that matches the expectation of its users best */
1072 return fdatasync (fd);
1073}
1074
1075static int
1076eio__fallocate (int fd, int mode, off_t offset, size_t len)
1077{
1078#if HAVE_FALLOCATE
1079 return fallocate (fd, mode, offset, len);
1080#else
1081 errno = ENOSYS;
1082 return -1;
1083#endif
1084}
563 1085
564#if !HAVE_READAHEAD 1086#if !HAVE_READAHEAD
1087# undef readahead
565# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self) 1088# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
566 1089
1090static eio_ssize_t
567static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self) 1091eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
568{ 1092{
569 size_t todo = count; 1093 size_t todo = count;
570 dBUF; 1094 dBUF;
571 1095
572 while (todo > 0) 1096 while (todo > 0)
573 { 1097 {
574 size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE; 1098 size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE;
575 1099
576 pread (fd, aio_buf, len, offset); 1100 pread (fd, eio_buf, len, offset);
577 offset += len; 1101 offset += len;
578 todo -= len; 1102 todo -= len;
579 } 1103 }
580 1104
1105 FUBd;
1106
581 errno = 0; 1107 errno = 0;
582 return count; 1108 return count;
583} 1109}
584 1110
585#endif 1111#endif
586 1112
587#if !HAVE_READDIR_R
588# define readdir_r aio_readdir_r
589
590static mutex_t readdirlock = X_MUTEX_INIT;
591
592static int readdir_r (DIR *dirp, X_DIRENT *ent, X_DIRENT **res)
593{
594 X_DIRENT *e;
595 int errorno;
596
597 X_LOCK (readdirlock);
598
599 e = readdir (dirp);
600 errorno = errno;
601
602 if (e)
603 {
604 *res = ent;
605 strcpy (ent->d_name, e->d_name);
606 }
607 else
608 *res = 0;
609
610 X_UNLOCK (readdirlock);
611
612 errno = errorno;
613 return e ? 0 : -1;
614}
615#endif
616
617/* sendfile always needs emulation */ 1113/* sendfile always needs emulation */
1114static eio_ssize_t
618static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self) 1115eio__sendfile (int ofd, int ifd, off_t offset, size_t count)
619{ 1116{
1117 eio_ssize_t written = 0;
620 ssize_t res; 1118 eio_ssize_t res;
621 1119
622 if (!count) 1120 if (!count)
623 return 0; 1121 return 0;
624 1122
1123 for (;;)
1124 {
1125#ifdef __APPLE__
1126# undef HAVE_SENDFILE /* broken, as everything on os x */
1127#endif
625#if HAVE_SENDFILE 1128#if HAVE_SENDFILE
626# if __linux 1129# if __linux
1130 off_t soffset = offset;
627 res = sendfile (ofd, ifd, &offset, count); 1131 res = sendfile (ofd, ifd, &soffset, count);
628 1132
629# elif __freebsd 1133# elif __FreeBSD__
630 /* 1134 /*
631 * Of course, the freebsd sendfile is a dire hack with no thoughts 1135 * Of course, the freebsd sendfile is a dire hack with no thoughts
632 * wasted on making it similar to other I/O functions. 1136 * wasted on making it similar to other I/O functions.
633 */ 1137 */
634 {
635 off_t sbytes; 1138 off_t sbytes;
636 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); 1139 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
637 1140
638 if (res < 0 && sbytes) 1141 #if 0 /* according to the manpage, this is correct, but broken behaviour */
639 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */ 1142 /* freebsd' sendfile will return 0 on success */
1143 /* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */
1144 /* not on e.g. EIO or EPIPE - sounds broken */
1145 if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0)
640 res = sbytes; 1146 res = sbytes;
641 } 1147 #endif
1148
1149 /* according to source inspection, this is correct, and useful behaviour */
1150 if (sbytes)
1151 res = sbytes;
1152
1153# elif defined (__APPLE__)
1154 off_t sbytes = count;
1155 res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
1156
1157 /* according to the manpage, sbytes is always valid */
1158 if (sbytes)
1159 res = sbytes;
642 1160
643# elif __hpux 1161# elif __hpux
644 res = sendfile (ofd, ifd, offset, count, 0, 0); 1162 res = sendfile (ofd, ifd, offset, count, 0, 0);
645 1163
646# elif __solaris 1164# elif __solaris
647 {
648 struct sendfilevec vec; 1165 struct sendfilevec vec;
649 size_t sbytes; 1166 size_t sbytes;
650 1167
651 vec.sfv_fd = ifd; 1168 vec.sfv_fd = ifd;
652 vec.sfv_flag = 0; 1169 vec.sfv_flag = 0;
653 vec.sfv_off = offset; 1170 vec.sfv_off = offset;
654 vec.sfv_len = count; 1171 vec.sfv_len = count;
655 1172
656 res = sendfilev (ofd, &vec, 1, &sbytes); 1173 res = sendfilev (ofd, &vec, 1, &sbytes);
657 1174
658 if (res < 0 && sbytes) 1175 if (res < 0 && sbytes)
659 res = sbytes; 1176 res = sbytes;
660 }
661 1177
662# endif 1178# endif
1179
1180#elif defined (_WIN32) && 0
1181 /* does not work, just for documentation of what would need to be done */
1182 /* actually, cannot be done like this, as TransmitFile changes the file offset, */
1183 /* libeio guarantees that the file offset does not change, and windows */
1184 /* has no way to get an independent handle to the same file description */
1185 HANDLE h = TO_SOCKET (ifd);
1186 SetFilePointer (h, offset, 0, FILE_BEGIN);
1187 res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
1188
663#else 1189#else
664 res = -1; 1190 res = -1;
665 errno = ENOSYS; 1191 errno = ENOSYS;
666#endif 1192#endif
667 1193
1194 /* we assume sendfile can copy at least 128mb in one go */
1195 if (res <= 128 * 1024 * 1024)
1196 {
1197 if (res > 0)
1198 written += res;
1199
1200 if (written)
1201 return written;
1202
1203 break;
1204 }
1205 else
1206 {
1207 /* if we requested more, then probably the kernel was lazy */
1208 written += res;
1209 offset += res;
1210 count -= res;
1211
1212 if (!count)
1213 return written;
1214 }
1215 }
1216
668 if (res < 0 1217 if (res < 0
669 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK 1218 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
1219 /* BSDs */
1220#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */
1221 || errno == ENOTSUP
1222#endif
1223#ifdef EOPNOTSUPP /* windows */
1224 || errno == EOPNOTSUPP /* BSDs */
1225#endif
670#if __solaris 1226#if __solaris
671 || errno == EAFNOSUPPORT || errno == EPROTOTYPE 1227 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
672#endif 1228#endif
673 ) 1229 )
674 ) 1230 )
… …
678 1234
679 res = 0; 1235 res = 0;
680 1236
681 while (count) 1237 while (count)
682 { 1238 {
683 ssize_t cnt; 1239 eio_ssize_t cnt;
684 1240
685 cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset); 1241 cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);
686 1242
687 if (cnt <= 0) 1243 if (cnt <= 0)
688 { 1244 {
… …
700 1256
701 offset += cnt; 1257 offset += cnt;
702 res += cnt; 1258 res += cnt;
703 count -= cnt; 1259 count -= cnt;
704 } 1260 }
1261
1262 FUBd;
705 } 1263 }
706 1264
707 return res; 1265 return res;
708} 1266}
709 1267
710/* read a full directory */ 1268#ifdef PAGESIZE
711static void scandir_ (eio_req *req, worker *self) 1269# define eio_pagesize() PAGESIZE
1270#else
1271static intptr_t
1272eio_pagesize (void)
712{ 1273{
713 DIR *dirp; 1274 static intptr_t page;
714 union
715 {
716 EIO_STRUCT_DIRENT d;
717 char b [offsetof (EIO_STRUCT_DIRENT, d_name) + NAME_MAX + 1];
718 } *u;
719 EIO_STRUCT_DIRENT *entp;
720 char *name, *names;
721 int memlen = 4096;
722 int memofs = 0;
723 int res = 0;
724 1275
725 X_LOCK (wrklock); 1276 if (!page)
726 self->dirp = dirp = opendir (req->ptr1); 1277 page = sysconf (_SC_PAGESIZE);
727 self->dbuf = u = malloc (sizeof (*u));
728 req->flags |= EIO_FLAG_PTR2_FREE;
729 req->ptr2 = names = malloc (memlen);
730 X_UNLOCK (wrklock);
731 1278
732 if (dirp && u && names) 1279 return page;
733 for (;;) 1280}
1281#endif
1282
1283static void
1284eio_page_align (void **addr, size_t *length)
1285{
1286 intptr_t mask = eio_pagesize () - 1;
1287
1288 /* round down addr */
1289 intptr_t adj = mask & (intptr_t)*addr;
1290
1291 *addr = (void *)((intptr_t)*addr - adj);
1292 *length += adj;
1293
1294 /* round up length */
1295 *length = (*length + mask) & ~mask;
1296}
1297
1298#if !_POSIX_MEMLOCK
1299# define eio__mlockall(a) EIO_ENOSYS ()
1300#else
1301
1302static int
1303eio__mlockall (int flags)
1304{
1305 #if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
1306 extern int mallopt (int, int);
1307 mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
1308 #endif
1309
1310 if (EIO_MCL_CURRENT != MCL_CURRENT
1311 || EIO_MCL_FUTURE != MCL_FUTURE)
1312 {
1313 flags = 0
1314 | (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0)
1315 | (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0);
1316 }
1317
1318 return mlockall (flags);
1319}
1320#endif
1321
1322#if !_POSIX_MEMLOCK_RANGE
1323# define eio__mlock(a,b) EIO_ENOSYS ()
1324#else
1325
1326static int
1327eio__mlock (void *addr, size_t length)
1328{
1329 eio_page_align (&addr, &length);
1330
1331 return mlock (addr, length);
1332}
1333
1334#endif
1335
1336#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
1337# define eio__msync(a,b,c) EIO_ENOSYS ()
1338#else
1339
1340static int
1341eio__msync (void *mem, size_t len, int flags)
1342{
1343 eio_page_align (&mem, &len);
1344
1345 if (EIO_MS_ASYNC != MS_SYNC
1346 || EIO_MS_INVALIDATE != MS_INVALIDATE
1347 || EIO_MS_SYNC != MS_SYNC)
1348 {
1349 flags = 0
1350 | (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
1351 | (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
1352 | (flags & EIO_MS_SYNC ? MS_SYNC : 0);
1353 }
1354
1355 return msync (mem, len, flags);
1356}
1357
1358#endif
1359
1360static int
1361eio__mtouch (eio_req *req)
1362{
1363 void *mem = req->ptr2;
1364 size_t len = req->size;
1365 int flags = req->int1;
1366
1367 eio_page_align (&mem, &len);
1368
1369 {
1370 intptr_t addr = (intptr_t)mem;
1371 intptr_t end = addr + len;
1372 intptr_t page = eio_pagesize ();
1373
1374 if (addr < end)
1375 if (flags & EIO_MT_MODIFY) /* modify */
1376 do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req));
1377 else
1378 do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req));
1379 }
1380
1381 return 0;
1382}
1383
1384/*****************************************************************************/
1385/* requests implemented outside eio_execute, because they are so large */
1386
1387/* result will always end up in tmpbuf, there is always space for adding a 0-byte */
1388static int
1389eio__realpath (struct tmpbuf *tmpbuf, eio_wd wd, const char *path)
1390{
1391 const char *rel = path;
1392 char *res;
1393 char *tmp1, *tmp2;
1394#if SYMLOOP_MAX > 32
1395 int symlinks = SYMLOOP_MAX;
1396#else
1397 int symlinks = 32;
1398#endif
1399
1400 errno = EINVAL;
1401 if (!rel)
1402 return -1;
1403
1404 errno = ENOENT;
1405 if (!*rel)
1406 return -1;
1407
1408 res = tmpbuf_get (tmpbuf, PATH_MAX * 3);
1409 tmp1 = res + PATH_MAX;
1410 tmp2 = tmp1 + PATH_MAX;
1411
1412#if 0 /* disabled, the musl way to do things is just too racy */
1413#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
1414 /* on linux we may be able to ask the kernel */
1415 {
1416 int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME);
1417
1418 if (fd >= 0)
734 { 1419 {
1420 sprintf (tmp1, "/proc/self/fd/%d", fd);
1421 req->result = readlink (tmp1, res, PATH_MAX);
1422 close (fd);
1423
1424 /* here we should probably stat the open file and the disk file, to make sure they still match */
1425
1426 if (req->result > 0)
1427 goto done;
1428 }
1429 else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)
1430 return;
1431 }
1432#endif
1433#endif
1434
1435 if (*rel != '/')
1436 {
1437 int len;
1438
735 errno = 0; 1439 errno = ENOENT;
736 readdir_r (dirp, &u->d, &entp); 1440 if (wd == EIO_INVALID_WD)
1441 return -1;
1442
1443 if (wd == EIO_CWD)
1444 {
1445 if (!getcwd (res, PATH_MAX))
1446 return -1;
737 1447
738 if (!entp) 1448 len = strlen (res);
1449 }
1450 else
1451 memcpy (res, wd->str, len = wd->len);
1452
1453 if (res [1]) /* only use if not / */
1454 res += len;
1455 }
1456
1457 while (*rel)
1458 {
1459 eio_ssize_t len, linklen;
1460 const char *beg = rel;
1461
1462 while (*rel && *rel != '/')
1463 ++rel;
1464
1465 len = rel - beg;
1466
1467 if (!len) /* skip slashes */
1468 {
739 break; 1469 ++rel;
1470 continue;
1471 }
740 1472
741 name = entp->d_name; 1473 if (beg [0] == '.')
1474 {
1475 if (len == 1)
1476 continue; /* . - nop */
742 1477
743 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) 1478 if (beg [1] == '.' && len == 2)
1479 {
1480 /* .. - back up one component, if possible */
1481
1482 while (res != tmpbuf->ptr)
1483 if (*--res == '/')
1484 break;
1485
1486 continue;
1487 }
1488 }
1489
1490 errno = ENAMETOOLONG;
1491 if (res + 1 + len + 1 >= tmp1)
1492 return;
1493
1494 /* copy one component */
1495 *res = '/';
1496 memcpy (res + 1, beg, len);
1497
1498 /* zero-terminate, for readlink */
1499 res [len + 1] = 0;
1500
1501 /* now check if it's a symlink */
1502 linklen = readlink (tmpbuf->ptr, tmp1, PATH_MAX);
1503
1504 if (linklen < 0)
744 { 1505 {
745 int len = strlen (name) + 1; 1506 if (errno != EINVAL)
1507 return -1;
746 1508
747 res++; 1509 /* it's a normal directory. hopefully */
748
749 while (memofs + len > memlen)
750 {
751 memlen *= 2;
752 X_LOCK (wrklock);
753 req->ptr2 = names = realloc (names, memlen);
754 X_UNLOCK (wrklock);
755
756 if (!names)
757 break;
758 }
759
760 memcpy (names + memofs, name, len);
761 memofs += len; 1510 res += len + 1;
762 }
763 }
764
765 if (errno)
766 res = -1;
767
768 req->result = res;
769}
770
771/*****************************************************************************/
772
773X_THREAD_PROC (eio_proc)
774{
775 eio_req *req;
776 struct timespec ts;
777 worker *self = (worker *)thr_arg;
778
779 /* try to distribute timeouts somewhat randomly */
780 ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
781
782 for (;;)
783 {
784 ts.tv_sec = time (0) + IDLE_TIMEOUT;
785
786 X_LOCK (reqlock);
787
788 for (;;)
789 {
790 self->req = req = reqq_shift (&req_queue);
791
792 if (req)
793 break;
794
795 ++idle;
796
797 if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
798 {
799 if (idle > max_idle)
800 {
801 --idle;
802 X_UNLOCK (reqlock);
803 X_LOCK (wrklock);
804 --started;
805 X_UNLOCK (wrklock);
806 goto quit;
807 }
808
809 /* we are allowed to idle, so do so without any timeout */
810 X_COND_WAIT (reqwait, reqlock);
811 ts.tv_sec = time (0) + IDLE_TIMEOUT;
812 }
813
814 --idle;
815 }
816
817 --nready;
818
819 X_UNLOCK (reqlock);
820
821 errno = 0; /* strictly unnecessary */
822
823 if (!EIO_CANCELLED (req))
824 switch (req->type)
825 {
826 case EIO_READ: req->result = req->offs >= 0
827 ? pread (req->int1, req->ptr2, req->size, req->offs)
828 : read (req->int1, req->ptr2, req->size); break;
829 case EIO_WRITE: req->result = req->offs >= 0
830 ? pwrite (req->int1, req->ptr2, req->size, req->offs)
831 : write (req->int1, req->ptr2, req->size); break;
832
833 case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
834 case EIO_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
835
836 case EIO_STAT: req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
837 case EIO_LSTAT: req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
838 case EIO_FSTAT: req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
839
840 case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
841 case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
842 case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
843 case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
844 case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
845 case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
846
847 case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
848 case EIO_CLOSE: req->result = close (req->int1); break;
849 case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
850 case EIO_UNLINK: req->result = unlink (req->ptr1); break;
851 case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
852 case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
853 case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
854 case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
855 case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
856 case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
857 case EIO_READLINK: req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
858
859 case EIO_SYNC: req->result = 0; sync (); break;
860 case EIO_FSYNC: req->result = fsync (req->int1); break;
861 case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
862
863 case EIO_READDIR: scandir_ (req, self); break;
864
865 case EIO_BUSY:
866#ifdef _WIN32
867 Sleep (req->nv1 * 1000.);
868#else
869 {
870 struct timeval tv;
871
872 tv.tv_sec = req->nv1;
873 tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
874
875 req->result = select (0, 0, 0, 0, &tv);
876 }
877#endif
878 break;
879
880 case EIO_UTIME:
881 case EIO_FUTIME:
882 {
883 struct timeval tv[2];
884 struct timeval *times;
885
886 if (req->nv1 != -1. || req->nv2 != -1.)
887 {
888 tv[0].tv_sec = req->nv1;
889 tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
890 tv[1].tv_sec = req->nv2;
891 tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
892
893 times = tv;
894 }
895 else
896 times = 0;
897
898
899 req->result = req->type == EIO_FUTIME
900 ? futimes (req->int1, times)
901 : utimes (req->ptr1, times);
902 }
903
904 case EIO_GROUP:
905 case EIO_NOP:
906 break;
907
908 case EIO_QUIT:
909 goto quit;
910
911 default:
912 req->result = -1;
913 break;
914 }
915
916 req->errorno = errno;
917
918 X_LOCK (reslock);
919
920 ++npending;
921
922 if (!reqq_push (&res_queue, req) && want_poll_cb)
923 want_poll_cb ();
924
925 self->req = 0;
926 worker_clear (self);
927
928 X_UNLOCK (reslock);
929 }
930
931quit:
932 X_LOCK (wrklock);
933 worker_free (self);
934 X_UNLOCK (wrklock);
935
936 return 0;
937}
938
939/*****************************************************************************/
940
941static void eio_atfork_prepare (void)
942{
943 X_LOCK (wrklock);
944 X_LOCK (reqlock);
945 X_LOCK (reslock);
946#if !HAVE_PREADWRITE
947 X_LOCK (preadwritelock);
948#endif
949#if !HAVE_READDIR_R
950 X_LOCK (readdirlock);
951#endif
952}
953
954static void eio_atfork_parent (void)
955{
956#if !HAVE_READDIR_R
957 X_UNLOCK (readdirlock);
958#endif
959#if !HAVE_PREADWRITE
960 X_UNLOCK (preadwritelock);
961#endif
962 X_UNLOCK (reslock);
963 X_UNLOCK (reqlock);
964 X_UNLOCK (wrklock);
965}
966
967static void eio_atfork_child (void)
968{
969 eio_req *prv;
970
971 while (prv = reqq_shift (&req_queue))
972 eio_destroy (prv);
973
974 while (prv = reqq_shift (&res_queue))
975 eio_destroy (prv);
976
977 while (wrk_first.next != &wrk_first)
978 {
979 worker *wrk = wrk_first.next;
980
981 if (wrk->req)
982 eio_destroy (wrk->req);
983
984 worker_clear (wrk);
985 worker_free (wrk);
986 }
987
988 started = 0;
989 idle = 0;
990 nreqs = 0;
991 nready = 0;
992 npending = 0;
993
994 eio_atfork_parent ();
995}
996
997int eio_init (void (*want_poll)(void), void (*done_poll)(void))
998{
999 want_poll_cb = want_poll;
1000 done_poll_cb = done_poll;
1001
1002#ifdef _WIN32
1003 X_MUTEX_CHECK (wrklock);
1004 X_MUTEX_CHECK (reslock);
1005 X_MUTEX_CHECK (reqlock);
1006 X_MUTEX_CHECK (reqwait);
1007 X_MUTEX_CHECK (preadwritelock);
1008 X_MUTEX_CHECK (readdirlock);
1009
1010 X_COND_CHECK (reqwait);
1011#endif
1012
1013 X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);
1014}
1015
1016#if 0
1017
1018eio_req *eio_fsync (int fd, eio_cb cb);
1019eio_req *eio_fdatasync (int fd, eio_cb cb);
1020eio_req *eio_dupclose (int fd, eio_cb cb);
1021eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb);
1022eio_req *eio_read (int fd, off_t offs, size_t length, char *data, eio_cb cb);
1023eio_req *eio_write (int fd, off_t offs, size_t length, char *data, eio_cb cb);
1024eio_req *eio_fstat (int fd, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */
1025eio_req *eio_futime (int fd, double atime, double mtime, eio_cb cb);
1026eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb);
1027eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb);
1028eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb);
1029eio_req *eio_dup2 (int fd, int fd2, eio_cb cb);
1030eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb);
1031eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb);
1032eio_req *eio_readlink (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */
1033eio_req *eio_stat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */
1034eio_req *eio_lstat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */
1035eio_req *eio_utime (const char *path, double atime, double mtime, eio_cb cb);
1036eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb);
1037eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb);
1038eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb);
1039eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb);
1040eio_req *eio_unlink (const char *path, eio_cb cb);
1041eio_req *eio_rmdir (const char *path, eio_cb cb);
1042eio_req *eio_readdir (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */
1043eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb);
1044eio_req *eio_busy (double delay, eio_cb cb); /* ties a thread for this long, simulating busyness */
1045eio_req *eio_nop (eio_cb cb); /* does nothing except go through the whole process */
1046void
1047aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1048 PROTOTYPE: $$$;$
1049 PPCODE:
1050{
1051 dREQ;
1052
1053 req->type = EIO_OPEN;
1054 req->sv1 = newSVsv (pathname);
1055 req->ptr1 = SvPVbyte_nolen (req->sv1);
1056 req->int1 = flags;
1057 req->int2 = mode;
1058
1059 EIO_SEND;
1060}
1061
1062void
1063aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1064 PROTOTYPE: $;$
1065 ALIAS:
1066 aio_fsync = EIO_FSYNC
1067 aio_fdatasync = EIO_FDATASYNC
1068 PPCODE:
1069{
1070 dREQ;
1071
1072 req->type = ix;
1073 req->sv1 = newSVsv (fh);
1074 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1075
1076 EIO_SEND (req);
1077}
1078
1079void
1080aio_close (SV *fh, SV *callback=&PL_sv_undef)
1081 PROTOTYPE: $;$
1082 PPCODE:
1083{
1084 dREQ;
1085
1086 req->type = EIO_CLOSE;
1087 req->sv1 = newSVsv (fh);
1088 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1089
1090 EIO_SEND (req);
1091}
1092
1093void
1094aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1095 ALIAS:
1096 aio_read = EIO_READ
1097 aio_write = EIO_WRITE
1098 PROTOTYPE: $$$$$;$
1099 PPCODE:
1100{
1101 STRLEN svlen;
1102 char *svptr = SvPVbyte (data, svlen);
1103 UV len = SvUV (length);
1104
1105 SvUPGRADE (data, SVt_PV);
1106 SvPOK_on (data);
1107
1108 if (dataoffset < 0)
1109 dataoffset += svlen;
1110
1111 if (dataoffset < 0 || dataoffset > svlen)
1112 croak ("dataoffset outside of data scalar");
1113
1114 if (ix == EIO_WRITE)
1115 {
1116 /* write: check length and adjust. */
1117 if (!SvOK (length) || len + dataoffset > svlen)
1118 len = svlen - dataoffset;
1119 } 1511 }
1120 else 1512 else
1121 { 1513 {
1122 /* read: grow scalar as necessary */ 1514 /* yay, it was a symlink - build new path in tmp2 */
1123 svptr = SvGROW (data, len + dataoffset + 1); 1515 int rellen = strlen (rel);
1516
1517 errno = ENAMETOOLONG;
1518 if (linklen + 1 + rellen >= PATH_MAX)
1519 return -1;
1520
1521 errno = ELOOP;
1522 if (!--symlinks)
1523 return -1;
1524
1525 if (*tmp1 == '/')
1526 res = tmpbuf->ptr; /* symlink resolves to an absolute path */
1527
1528 /* we need to be careful, as rel might point into tmp2 already */
1529 memmove (tmp2 + linklen + 1, rel, rellen + 1);
1530 tmp2 [linklen] = '/';
1531 memcpy (tmp2, tmp1, linklen);
1532
1533 rel = tmp2;
1124 } 1534 }
1535 }
1125 1536
1537 /* special case for the lone root path */
1538 if (res == tmpbuf->ptr)
1539 *res++ = '/';
1540
1541 return res - (char *)tmpbuf->ptr;
1542}
1543
1544static signed char
1545eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
1546{
1547 return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */
1548 : a->inode < b->inode ? -1
1549 : a->inode > b->inode ? 1
1550 : 0;
1551}
1552
1553#define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0
1554
1555#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */
1556#define EIO_SORT_FAST 60 /* when to only use insertion sort */
1557
1558static void
1559eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits)
1560{
1561 unsigned char bits [9 + sizeof (eio_ino_t) * 8];
1562 unsigned char *bit = bits;
1563
1564 assert (CHAR_BIT == 8);
1565 assert (sizeof (eio_dirent) * 8 < 256);
1566 assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */
1567 assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */
1568
1569 if (size <= EIO_SORT_FAST)
1570 return;
1571
1572 /* first prepare an array of bits to test in our radix sort */
1573 /* try to take endianness into account, as well as differences in eio_ino_t sizes */
1574 /* inode_bits must contain all inodes ORed together */
1575 /* which is used to skip bits that are 0 everywhere, which is very common */
1576 {
1577 eio_ino_t endianness;
1578 int i, j;
1579
1580 /* we store the byte offset of byte n into byte n of "endianness" */
1581 for (i = 0; i < sizeof (eio_ino_t); ++i)
1582 ((unsigned char *)&endianness)[i] = i;
1583
1584 *bit++ = 0;
1585
1586 for (i = 0; i < sizeof (eio_ino_t); ++i)
1587 {
1588 /* shifting off the byte offsets out of "endianness" */
1589 int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8;
1590 endianness >>= 8;
1591
1592 for (j = 0; j < 8; ++j)
1593 if (inode_bits & (((eio_ino_t)1) << (i * 8 + j)))
1594 *bit++ = offs + j;
1595 }
1596
1597 for (j = 0; j < 8; ++j)
1598 if (score_bits & (1 << j))
1599 *bit++ = offsetof (eio_dirent, score) * 8 + j;
1600 }
1601
1602 /* now actually do the sorting (a variant of MSD radix sort) */
1603 {
1604 eio_dirent *base_stk [9 + sizeof (eio_ino_t) * 8], *base;
1605 eio_dirent *end_stk [9 + sizeof (eio_ino_t) * 8], *end;
1606 unsigned char *bit_stk [9 + sizeof (eio_ino_t) * 8];
1607 int stk_idx = 0;
1608
1609 base_stk [stk_idx] = dents;
1610 end_stk [stk_idx] = dents + size;
1611 bit_stk [stk_idx] = bit - 1;
1612
1613 do
1614 {
1615 base = base_stk [stk_idx];
1616 end = end_stk [stk_idx];
1617 bit = bit_stk [stk_idx];
1618
1619 for (;;)
1620 {
1621 unsigned char O = *bit >> 3;
1622 unsigned char M = 1 << (*bit & 7);
1623
1624 eio_dirent *a = base;
1625 eio_dirent *b = end;
1626
1627 if (b - a < EIO_SORT_CUTOFF)
1628 break;
1629
1630 /* now bit-partition the array on the bit */
1631 /* this ugly asymmetric loop seems to perform much better than typical */
1632 /* partition algos found in the literature */
1633 do
1634 if (!(((unsigned char *)a)[O] & M))
1635 ++a;
1636 else if (!(((unsigned char *)--b)[O] & M))
1637 {
1638 eio_dirent tmp = *a; *a = *b; *b = tmp;
1639 ++a;
1640 }
1641 while (b > a);
1642
1643 /* next bit, or stop, if no bits left in this path */
1644 if (!*--bit)
1645 break;
1646
1647 base_stk [stk_idx] = a;
1648 end_stk [stk_idx] = end;
1649 bit_stk [stk_idx] = bit;
1650 ++stk_idx;
1651
1652 end = a;
1653 }
1654 }
1655 while (stk_idx--);
1656 }
1657}
1658
1659static void
1660eio_dent_insertion_sort (eio_dirent *dents, int size)
1661{
1662 /* first move the smallest element to the front, to act as a sentinel */
1663 {
1664 int i;
1665 eio_dirent *min = dents;
1666
1667 /* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */
1668 for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; )
1669 if (EIO_DENT_CMP (dents [i], <, *min))
1670 min = &dents [i];
1671
1672 /* swap elements 0 and j (minimum) */
1673 {
1674 eio_dirent tmp = *dents; *dents = *min; *min = tmp;
1675 }
1676 }
1677
1678 /* then do standard insertion sort, assuming that all elements are >= dents [0] */
1679 {
1680 eio_dirent *i, *j;
1681
1682 for (i = dents + 1; i < dents + size; ++i)
1683 {
1684 eio_dirent value = *i;
1685
1686 for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j)
1687 j [1] = j [0];
1688
1689 j [1] = value;
1690 }
1691 }
1692}
1693
1694static void
1695eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits)
1696{
1697 if (size <= 1)
1698 return; /* our insertion sort relies on size > 0 */
1699
1700 /* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */
1701 /* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */
1702 eio_dent_radix_sort (dents, size, score_bits, inode_bits);
1703
1704 /* use an insertion sort at the end, or for small arrays, */
1705 /* as insertion sort is more efficient for small partitions */
1706 eio_dent_insertion_sort (dents, size);
1707}
1708
1709/* read a full directory */
1710static void
1711eio__scandir (eio_req *req, etp_worker *self)
1712{
1713 char *name, *names;
1714 int namesalloc = 4096 - sizeof (void *) * 4;
1715 int namesoffs = 0;
1716 int flags = req->int1;
1717 eio_dirent *dents = 0;
1718 int dentalloc = 128;
1719 int dentoffs = 0;
1720 eio_ino_t inode_bits = 0;
1721#ifdef _WIN32
1722 HANDLE dirp;
1723 WIN32_FIND_DATA entp;
1724#else
1725 DIR *dirp;
1726 EIO_STRUCT_DIRENT *entp;
1727#endif
1728
1729 req->result = -1;
1730
1731 if (!(flags & EIO_READDIR_DENTS))
1732 flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
1733
1734#ifdef _WIN32
1735 {
1736 int len = strlen ((const char *)req->ptr1);
1737 char *path = malloc (MAX_PATH);
1738 const char *fmt;
1739 const char *reqpath = wd_expand (&self->tmpbuf, req->wd, req->ptr1);
1740
1741 if (!len)
1742 fmt = "./*";
1743 else if (reqpath[len - 1] == '/' || reqpath[len - 1] == '\\')
1744 fmt = "%s*";
1745 else
1746 fmt = "%s/*";
1747
1748 _snprintf (path, MAX_PATH, fmt, reqpath);
1749 dirp = FindFirstFile (path, &entp);
1750 free (path);
1751
1752 if (dirp == INVALID_HANDLE_VALUE)
1753 {
1754 /* should steal _dosmaperr */
1755 switch (GetLastError ())
1756 {
1757 case ERROR_FILE_NOT_FOUND:
1758 req->result = 0;
1759 break;
1760
1761 case ERROR_INVALID_NAME:
1762 case ERROR_PATH_NOT_FOUND:
1763 case ERROR_NO_MORE_FILES:
1764 errno = ENOENT;
1765 break;
1766
1767 case ERROR_NOT_ENOUGH_MEMORY:
1768 errno = ENOMEM;
1769 break;
1770
1771 default:
1772 errno = EINVAL;
1773 break;
1774 }
1775
1776 return;
1777 }
1778 }
1779#else
1780 #if HAVE_AT
1781 if (req->wd)
1782 {
1783 int fd = openat (WD2FD (req->wd), req->ptr1, O_CLOEXEC | O_SEARCH | O_DIRECTORY);
1784
1126 if (len < 0) 1785 if (fd < 0)
1127 croak ("length must not be negative"); 1786 return;
1128 1787
1788 dirp = fdopendir (fd);
1789
1790 if (!dirp)
1791 close (fd);
1792 }
1793 else
1794 dirp = opendir (req->ptr1);
1795 #else
1796 dirp = opendir (wd_expand (&self->tmpbuf, req->wd, req->ptr1));
1797 #endif
1798
1799 if (!dirp)
1800 return;
1801#endif
1802
1803 if (req->flags & EIO_FLAG_PTR1_FREE)
1804 free (req->ptr1);
1805
1806 req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
1807 req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
1808 req->ptr2 = names = malloc (namesalloc);
1809
1810 if (!names || (flags && !dents))
1811 return;
1812
1813 for (;;)
1814 {
1815 int done;
1816
1817#ifdef _WIN32
1818 done = !dirp;
1819#else
1820 errno = 0;
1821 entp = readdir (dirp);
1822 done = !entp;
1823#endif
1824
1825 if (done)
1129 { 1826 {
1130 dREQ; 1827#ifndef _WIN32
1828 int old_errno = errno;
1829 closedir (dirp);
1830 errno = old_errno;
1131 1831
1132 req->type = ix; 1832 if (errno)
1133 req->sv1 = newSVsv (fh); 1833 break;
1134 req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh)) 1834#endif
1135 : IoOFP (sv_2io (fh)));
1136 req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1137 req->size = len;
1138 req->sv2 = SvREFCNT_inc (data);
1139 req->ptr2 = (char *)svptr + dataoffset;
1140 req->stroffset = dataoffset;
1141 1835
1142 if (!SvREADONLY (data)) 1836 /* sort etc. */
1837 req->int1 = flags;
1838 req->result = dentoffs;
1839
1840 if (flags & EIO_READDIR_STAT_ORDER)
1841 eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits);
1842 else if (flags & EIO_READDIR_DIRS_FIRST)
1843 if (flags & EIO_READDIR_FOUND_UNKNOWN)
1844 eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */
1845 else
1846 {
1847 /* in this case, all is known, and we just put dirs first and sort them */
1848 eio_dirent *oth = dents + dentoffs;
1849 eio_dirent *dir = dents;
1850
1851 /* now partition dirs to the front, and non-dirs to the back */
1852 /* by walking from both sides and swapping if necessary */
1853 while (oth > dir)
1854 {
1855 if (dir->type == EIO_DT_DIR)
1856 ++dir;
1857 else if ((--oth)->type == EIO_DT_DIR)
1858 {
1859 eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
1860
1861 ++dir;
1862 }
1863 }
1864
1865 /* now sort the dirs only (dirs all have the same score) */
1866 eio_dent_sort (dents, dir - dents, 0, inode_bits);
1867 }
1868
1869 break;
1870 }
1871
1872 /* now add the entry to our list(s) */
1873 name = D_NAME (entp);
1874
1875 /* skip . and .. entries */
1876 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1877 {
1878 int len = D_NAMLEN (entp) + 1;
1879
1880 while (ecb_expect_false (namesoffs + len > namesalloc))
1143 { 1881 {
1144 SvREADONLY_on (data); 1882 namesalloc *= 2;
1145 req->flags |= FLAG_SV2_RO_OFF; 1883 req->ptr2 = names = realloc (names, namesalloc);
1884
1885 if (!names)
1886 break;
1146 } 1887 }
1147 1888
1148 EIO_SEND; 1889 memcpy (names + namesoffs, name, len);
1890
1891 if (dents)
1892 {
1893 struct eio_dirent *ent;
1894
1895 if (ecb_expect_false (dentoffs == dentalloc))
1896 {
1897 dentalloc *= 2;
1898 req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
1899
1900 if (!dents)
1901 break;
1902 }
1903
1904 ent = dents + dentoffs;
1905
1906 ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
1907 ent->namelen = len - 1;
1908 ent->inode = D_INO (entp);
1909
1910 inode_bits |= ent->inode;
1911
1912 switch (D_TYPE (entp))
1913 {
1914 default:
1915 ent->type = EIO_DT_UNKNOWN;
1916 flags |= EIO_READDIR_FOUND_UNKNOWN;
1917 break;
1918
1919 #ifdef DT_FIFO
1920 case DT_FIFO: ent->type = EIO_DT_FIFO; break;
1921 #endif
1922 #ifdef DT_CHR
1923 case DT_CHR: ent->type = EIO_DT_CHR; break;
1924 #endif
1925 #ifdef DT_MPC
1926 case DT_MPC: ent->type = EIO_DT_MPC; break;
1927 #endif
1928 #ifdef DT_DIR
1929 case DT_DIR: ent->type = EIO_DT_DIR; break;
1930 #endif
1931 #ifdef DT_NAM
1932 case DT_NAM: ent->type = EIO_DT_NAM; break;
1933 #endif
1934 #ifdef DT_BLK
1935 case DT_BLK: ent->type = EIO_DT_BLK; break;
1936 #endif
1937 #ifdef DT_MPB
1938 case DT_MPB: ent->type = EIO_DT_MPB; break;
1939 #endif
1940 #ifdef DT_REG
1941 case DT_REG: ent->type = EIO_DT_REG; break;
1942 #endif
1943 #ifdef DT_NWK
1944 case DT_NWK: ent->type = EIO_DT_NWK; break;
1945 #endif
1946 #ifdef DT_CMP
1947 case DT_CMP: ent->type = EIO_DT_CMP; break;
1948 #endif
1949 #ifdef DT_LNK
1950 case DT_LNK: ent->type = EIO_DT_LNK; break;
1951 #endif
1952 #ifdef DT_SOCK
1953 case DT_SOCK: ent->type = EIO_DT_SOCK; break;
1954 #endif
1955 #ifdef DT_DOOR
1956 case DT_DOOR: ent->type = EIO_DT_DOOR; break;
1957 #endif
1958 #ifdef DT_WHT
1959 case DT_WHT: ent->type = EIO_DT_WHT; break;
1960 #endif
1961 }
1962
1963 ent->score = 7;
1964
1965 if (flags & EIO_READDIR_DIRS_FIRST)
1966 {
1967 if (ent->type == EIO_DT_UNKNOWN)
1968 {
1969 if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
1970 ent->score = 1;
1971 else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */
1972 ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
1973 }
1974 else if (ent->type == EIO_DT_DIR)
1975 ent->score = 0;
1976 }
1977 }
1978
1979 namesoffs += len;
1980 ++dentoffs;
1149 } 1981 }
1982
1983 if (EIO_CANCELLED (req))
1984 {
1985 errno = ECANCELED;
1986 break;
1987 }
1988
1989#ifdef _WIN32
1990 if (!FindNextFile (dirp, &entp))
1991 {
1992 FindClose (dirp);
1993 dirp = 0;
1994 }
1995#endif
1996 }
1997}
1998
1999/*****************************************************************************/
2000/* working directory stuff */
2001/* various deficiencies in the posix 2008 api force us to */
2002/* keep the absolute path in string form at all times */
2003/* fuck yeah. */
2004
2005#if !HAVE_AT
2006
2007/* a bit like realpath, but usually faster because it doesn'T have to return */
2008/* an absolute or canonical path */
2009static const char *
2010wd_expand (struct tmpbuf *tmpbuf, eio_wd wd, const char *path)
2011{
2012 if (!wd || *path == '/')
2013 return path;
2014
2015 if (path [0] == '.' && !path [1])
2016 return wd->str;
2017
2018 {
2019 int l1 = wd->len;
2020 int l2 = strlen (path);
2021
2022 char *res = tmpbuf_get (tmpbuf, l1 + l2 + 2);
2023
2024 memcpy (res, wd->str, l1);
2025 res [l1] = '/';
2026 memcpy (res + l1 + 1, path, l2 + 1);
2027
2028 return res;
2029 }
2030}
2031
2032#endif
2033
2034static eio_wd
2035eio__wd_open_sync (struct tmpbuf *tmpbuf, eio_wd wd, const char *path)
2036{
2037 int fd;
2038 eio_wd res;
2039 int len = eio__realpath (tmpbuf, wd, path);
2040
2041 if (len < 0)
2042 return EIO_INVALID_WD;
2043
2044#if HAVE_AT
2045 fd = openat (WD2FD (wd), path, O_CLOEXEC | O_SEARCH | O_DIRECTORY);
2046
2047 if (fd < 0)
2048 return EIO_INVALID_WD;
2049#endif
2050
2051 res = malloc (sizeof (*res) + len); /* one extra 0-byte */
2052
2053#if HAVE_AT
2054 res->fd = fd;
2055#endif
2056
2057 res->len = len;
2058 memcpy (res->str, tmpbuf->ptr, len);
2059 res->str [len] = 0;
2060
2061 return res;
2062}
2063
2064eio_wd
2065eio_wd_open_sync (eio_wd wd, const char *path)
2066{
2067 struct tmpbuf tmpbuf = { 0 };
2068 wd = eio__wd_open_sync (&tmpbuf, wd, path);
2069 free (tmpbuf.ptr);
2070
2071 return wd;
1150} 2072}
1151 2073
1152void 2074void
1153aio_readlink (SV8 *path, SV *callback=&PL_sv_undef) 2075eio_wd_close_sync (eio_wd wd)
1154 PROTOTYPE: $$;$
1155 PPCODE:
1156{ 2076{
1157 SV *data; 2077 if (wd != EIO_INVALID_WD && wd != EIO_CWD)
1158 dREQ; 2078 {
1159 2079 #if HAVE_AT
1160 data = newSV (NAME_MAX); 2080 close (wd->fd);
1161 SvPOK_on (data); 2081 #endif
1162 2082 free (wd);
1163 req->type = EIO_READLINK; 2083 }
1164 req->sv1 = newSVsv (path);
1165 req->ptr1 = SvPVbyte_nolen (req->sv1);
1166 req->sv2 = data;
1167 req->ptr2 = SvPVbyte_nolen (data);
1168
1169 EIO_SEND;
1170} 2084}
2085
2086#if HAVE_AT
2087
2088/* they forgot these */
2089
2090static int
2091eio__truncateat (int dirfd, const char *path, off_t length)
2092{
2093 int fd = openat (dirfd, path, O_WRONLY | O_CLOEXEC);
2094 int res;
2095
2096 if (fd < 0)
2097 return fd;
2098
2099 res = ftruncate (fd, length);
2100 close (fd);
2101 return res;
2102}
2103
2104static int
2105eio__statvfsat (int dirfd, const char *path, struct statvfs *buf)
2106{
2107 int fd = openat (dirfd, path, O_SEARCH | O_CLOEXEC);
2108 int res;
2109
2110 if (fd < 0)
2111 return fd;
2112
2113 res = fstatvfs (fd, buf);
2114 close (fd);
2115 return res;
2116
2117}
2118
2119#endif
2120
2121/*****************************************************************************/
2122
2123#define ALLOC(len) \
2124 if (!req->ptr2) \
2125 { \
2126 X_LOCK (wrklock); \
2127 req->flags |= EIO_FLAG_PTR2_FREE; \
2128 X_UNLOCK (wrklock); \
2129 req->ptr2 = malloc (len); \
2130 if (!req->ptr2) \
2131 { \
2132 errno = ENOMEM; \
2133 req->result = -1; \
2134 break; \
2135 } \
2136 }
2137
2138X_THREAD_PROC (etp_proc)
2139{
2140 ETP_REQ *req;
2141 struct timespec ts;
2142 etp_worker *self = (etp_worker *)thr_arg;
2143
2144#if HAVE_PRCTL_SET_NAME
2145 prctl (PR_SET_NAME, (unsigned long)"eio_thread", 0, 0, 0);
2146#endif
2147
2148 /* try to distribute timeouts somewhat evenly */
2149 ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
2150
2151 for (;;)
2152 {
2153 ts.tv_sec = 0;
2154
2155 X_LOCK (reqlock);
2156
2157 for (;;)
2158 {
2159 req = reqq_shift (&req_queue);
2160
2161 if (req)
2162 break;
2163
2164 if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */
2165 {
2166 X_UNLOCK (reqlock);
2167 X_LOCK (wrklock);
2168 --started;
2169 X_UNLOCK (wrklock);
2170 goto quit;
2171 }
2172
2173 ++idle;
2174
2175 if (idle <= max_idle)
2176 /* we are allowed to idle, so do so without any timeout */
2177 X_COND_WAIT (reqwait, reqlock);
2178 else
2179 {
2180 /* initialise timeout once */
2181 if (!ts.tv_sec)
2182 ts.tv_sec = time (0) + idle_timeout;
2183
2184 if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
2185 ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */
2186 }
2187
2188 --idle;
2189 }
2190
2191 --nready;
2192
2193 X_UNLOCK (reqlock);
2194
2195 if (req->type < 0)
2196 goto quit;
2197
2198 ETP_EXECUTE (self, req);
2199
2200 X_LOCK (reslock);
2201
2202 ++npending;
2203
2204 if (!reqq_push (&res_queue, req) && want_poll_cb)
2205 want_poll_cb ();
2206
2207 etp_worker_clear (self);
2208
2209 X_UNLOCK (reslock);
2210 }
2211
2212quit:
2213 free (req);
2214
2215 X_LOCK (wrklock);
2216 etp_worker_free (self);
2217 X_UNLOCK (wrklock);
2218
2219 return 0;
2220}
2221
2222/*****************************************************************************/
2223
2224int ecb_cold
2225eio_init (void (*want_poll)(void), void (*done_poll)(void))
2226{
2227#if !HAVE_PREADWRITE
2228 X_MUTEX_CREATE (preadwritelock);
2229#endif
2230
2231 return etp_init (want_poll, done_poll);
2232}
2233
2234ecb_inline void
2235eio_api_destroy (eio_req *req)
2236{
2237 free (req);
2238}
2239
2240#define REQ(rtype) \
2241 eio_req *req; \
2242 \
2243 req = (eio_req *)calloc (1, sizeof *req); \
2244 if (!req) \
2245 return 0; \
2246 \
2247 req->type = rtype; \
2248 req->pri = pri; \
2249 req->finish = cb; \
2250 req->data = data; \
2251 req->destroy = eio_api_destroy;
2252
2253#define SEND eio_submit (req); return req
2254
2255#define PATH \
2256 req->flags |= EIO_FLAG_PTR1_FREE; \
2257 req->ptr1 = strdup (path); \
2258 if (!req->ptr1) \
2259 { \
2260 eio_api_destroy (req); \
2261 return 0; \
2262 }
2263
2264static void
2265eio_execute (etp_worker *self, eio_req *req)
2266{
2267#if HAVE_AT
2268 int dirfd;
2269#else
2270 const char *path;
2271#endif
2272
2273 if (ecb_expect_false (EIO_CANCELLED (req)))
2274 {
2275 req->result = -1;
2276 req->errorno = ECANCELED;
2277 return;
2278 }
2279
2280 if (ecb_expect_false (req->wd == EIO_INVALID_WD))
2281 {
2282 req->result = -1;
2283 req->errorno = ENOENT;
2284 return;
2285 }
2286
2287 if (req->type >= EIO_OPEN)
2288 {
2289 #if HAVE_AT
2290 dirfd = WD2FD (req->wd);
2291 #else
2292 path = wd_expand (&self->tmpbuf, req->wd, req->ptr1);
2293 #endif
2294 }
2295
2296 switch (req->type)
2297 {
2298 case EIO_WD_OPEN: req->wd = eio__wd_open_sync (&self->tmpbuf, req->wd, req->ptr1);
2299 req->result = req->wd == EIO_INVALID_WD ? -1 : 0;
2300 break;
2301 case EIO_WD_CLOSE: req->result = 0;
2302 eio_wd_close_sync (req->wd); break;
2303
2304 case EIO_READ: ALLOC (req->size);
2305 req->result = req->offs >= 0
2306 ? pread (req->int1, req->ptr2, req->size, req->offs)
2307 : read (req->int1, req->ptr2, req->size); break;
2308 case EIO_WRITE: req->result = req->offs >= 0
2309 ? pwrite (req->int1, req->ptr2, req->size, req->offs)
2310 : write (req->int1, req->ptr2, req->size); break;
2311
2312 case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
2313 case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size); break;
2314
2315#if HAVE_AT
2316
2317 case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2318 req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, 0); break;
2319 case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2320 req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, AT_SYMLINK_NOFOLLOW); break;
2321 case EIO_CHOWN: req->result = fchownat (dirfd, req->ptr1, req->int2, req->int3, 0); break;
2322 case EIO_CHMOD: req->result = fchmodat (dirfd, req->ptr1, (mode_t)req->int2, 0); break;
2323 case EIO_TRUNCATE: req->result = eio__truncateat (dirfd, req->ptr1, req->offs); break;
2324 case EIO_OPEN: req->result = openat (dirfd, req->ptr1, req->int1, (mode_t)req->int2); break;
2325
2326 case EIO_UNLINK: req->result = unlinkat (dirfd, req->ptr1, 0); break;
2327 case EIO_RMDIR: req->result = unlinkat (dirfd, req->ptr1, AT_REMOVEDIR); break;
2328 case EIO_MKDIR: req->result = mkdirat (dirfd, req->ptr1, (mode_t)req->int2); break;
2329 case EIO_RENAME: req->result = renameat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2); break;
2330 case EIO_LINK: req->result = linkat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2, 0); break;
2331 case EIO_SYMLINK: req->result = symlinkat (req->ptr1, dirfd, req->ptr2); break;
2332 case EIO_MKNOD: req->result = mknodat (dirfd, req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
2333 case EIO_READLINK: ALLOC (PATH_MAX);
2334 req->result = readlinkat (dirfd, req->ptr1, req->ptr2, PATH_MAX); break;
2335 case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
2336 req->result = eio__statvfsat (dirfd, req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
2337 case EIO_UTIME:
2338 case EIO_FUTIME:
2339 {
2340 struct timespec ts[2];
2341 struct timespec *times;
2342
2343 if (req->nv1 != -1. || req->nv2 != -1.)
2344 {
2345 ts[0].tv_sec = req->nv1;
2346 ts[0].tv_nsec = (req->nv1 - ts[0].tv_sec) * 1e9;
2347 ts[1].tv_sec = req->nv2;
2348 ts[1].tv_nsec = (req->nv2 - ts[1].tv_sec) * 1e9;
2349
2350 times = ts;
2351 }
2352 else
2353 times = 0;
2354
2355 req->result = req->type == EIO_FUTIME
2356 ? futimens (req->int1, times)
2357 : utimensat (dirfd, req->ptr1, times, 0);
2358 }
2359 break;
2360
2361#else
2362
2363 case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2364 req->result = stat (path , (EIO_STRUCT_STAT *)req->ptr2); break;
2365 case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2366 req->result = lstat (path , (EIO_STRUCT_STAT *)req->ptr2); break;
2367 case EIO_CHOWN: req->result = chown (path , req->int2, req->int3); break;
2368 case EIO_CHMOD: req->result = chmod (path , (mode_t)req->int2); break;
2369 case EIO_TRUNCATE: req->result = truncate (path , req->offs); break;
2370 case EIO_OPEN: req->result = open (path , req->int1, (mode_t)req->int2); break;
2371
2372 case EIO_UNLINK: req->result = unlink (path ); break;
2373 case EIO_RMDIR: req->result = rmdir (path ); break;
2374 case EIO_MKDIR: req->result = mkdir (path , (mode_t)req->int2); break;
2375 case EIO_RENAME: req->result = rename (path , req->ptr2); break;
2376 case EIO_LINK: req->result = link (path , req->ptr2); break;
2377 case EIO_SYMLINK: req->result = symlink (path , req->ptr2); break;
2378 case EIO_MKNOD: req->result = mknod (path , (mode_t)req->int2, (dev_t)req->offs); break;
2379 case EIO_READLINK: ALLOC (PATH_MAX);
2380 req->result = readlink (path, req->ptr2, PATH_MAX); break;
2381 case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
2382 req->result = statvfs (path , (EIO_STRUCT_STATVFS *)req->ptr2); break;
2383
2384 case EIO_UTIME:
2385 case EIO_FUTIME:
2386 {
2387 struct timeval tv[2];
2388 struct timeval *times;
2389
2390 if (req->nv1 != -1. || req->nv2 != -1.)
2391 {
2392 tv[0].tv_sec = req->nv1;
2393 tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1e6;
2394 tv[1].tv_sec = req->nv2;
2395 tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1e6;
2396
2397 times = tv;
2398 }
2399 else
2400 times = 0;
2401
2402 req->result = req->type == EIO_FUTIME
2403 ? futimes (req->int1, times)
2404 : utimes (req->ptr1, times);
2405 }
2406 break;
2407
2408#endif
2409
2410 case EIO_REALPATH: if (0 <= (req->result = eio__realpath (&self->tmpbuf, req->wd, req->ptr1)))
2411 {
2412 ALLOC (req->result);
2413 memcpy (req->ptr2, self->tmpbuf.ptr, req->result);
2414 }
2415 break;
2416
2417 case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2418 req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
2419
2420 case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
2421 req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
2422
2423 case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
2424 case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
2425 case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
2426
2427 case EIO_CLOSE: req->result = close (req->int1); break;
2428 case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
2429 case EIO_SYNC: req->result = 0; sync (); break;
2430 case EIO_FSYNC: req->result = fsync (req->int1); break;
2431 case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
2432 case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break;
2433 case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
2434 case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
2435 case EIO_MTOUCH: req->result = eio__mtouch (req); break;
2436 case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
2437 case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
2438 case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;
2439
2440 case EIO_READDIR: eio__scandir (req, self); break;
2441
2442 case EIO_BUSY:
2443#ifdef _WIN32
2444 Sleep (req->nv1 * 1e3);
2445#else
2446 {
2447 struct timeval tv;
2448
2449 tv.tv_sec = req->nv1;
2450 tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6;
2451
2452 req->result = select (0, 0, 0, 0, &tv);
2453 }
2454#endif
2455 break;
2456
2457 case EIO_GROUP:
2458 abort (); /* handled in eio_request */
2459
2460 case EIO_NOP:
2461 req->result = 0;
2462 break;
2463
2464 case EIO_CUSTOM:
2465 req->feed (req);
2466 break;
2467
2468 default:
2469 errno = ENOSYS;
2470 req->result = -1;
2471 break;
2472 }
2473
2474 req->errorno = errno;
2475}
2476
2477#ifndef EIO_NO_WRAPPERS
2478
2479eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data)
2480{
2481 REQ (EIO_WD_OPEN); PATH; SEND;
2482}
2483
2484eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data)
2485{
2486 REQ (EIO_WD_CLOSE); req->wd = wd; SEND;
2487}
2488
2489eio_req *eio_nop (int pri, eio_cb cb, void *data)
2490{
2491 REQ (EIO_NOP); SEND;
2492}
2493
2494eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
2495{
2496 REQ (EIO_BUSY); req->nv1 = delay; SEND;
2497}
2498
2499eio_req *eio_sync (int pri, eio_cb cb, void *data)
2500{
2501 REQ (EIO_SYNC); SEND;
2502}
2503
2504eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
2505{
2506 REQ (EIO_FSYNC); req->int1 = fd; SEND;
2507}
2508
2509eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
2510{
2511 REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
2512}
2513
2514eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
2515{
2516 REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
2517}
2518
2519eio_req *eio_syncfs (int fd, int pri, eio_cb cb, void *data)
2520{
2521 REQ (EIO_SYNCFS); req->int1 = fd; SEND;
2522}
2523
2524eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
2525{
2526 REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
2527}
2528
2529eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
2530{
2531 REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
2532}
2533
2534eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data)
2535{
2536 REQ (EIO_MLOCK); req->ptr2 = addr; req->size = length; SEND;
2537}
2538
2539eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)
2540{
2541 REQ (EIO_MLOCKALL); req->int1 = flags; SEND;
2542}
2543
2544eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)
2545{
2546 REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;
2547}
2548
2549eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
2550{
2551 REQ (EIO_CLOSE); req->int1 = fd; SEND;
2552}
2553
2554eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
2555{
2556 REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
2557}
2558
2559eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
2560{
2561 REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
2562}
2563
2564eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
2565{
2566 REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
2567}
2568
2569eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
2570{
2571 REQ (EIO_FSTAT); req->int1 = fd; SEND;
2572}
2573
2574eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data)
2575{
2576 REQ (EIO_FSTATVFS); req->int1 = fd; SEND;
2577}
2578
2579eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
2580{
2581 REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
2582}
2583
2584eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
2585{
2586 REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
2587}
2588
2589eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
2590{
2591 REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
2592}
2593
2594eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
2595{
2596 REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
2597}
2598
2599eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
2600{
2601 REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
2602}
2603
2604eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data)
2605{
2606 REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
2607}
2608
2609eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
2610{
2611 REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
2612}
2613
2614eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
2615{
2616 REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
2617}
2618
2619eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
2620{
2621 REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
2622}
2623
2624eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
2625{
2626 REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
2627}
2628
2629eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
2630{
2631 REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
2632}
2633
2634eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
2635{
2636 REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
2637}
2638
2639static eio_req *
2640eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
2641{
2642 REQ (type); PATH; SEND;
2643}
2644
2645eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
2646{
2647 return eio__1path (EIO_READLINK, path, pri, cb, data);
2648}
2649
2650eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data)
2651{
2652 return eio__1path (EIO_REALPATH, path, pri, cb, data);
2653}
2654
2655eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
2656{
2657 return eio__1path (EIO_STAT, path, pri, cb, data);
2658}
2659
2660eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
2661{
2662 return eio__1path (EIO_LSTAT, path, pri, cb, data);
2663}
2664
2665eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data)
2666{
2667 return eio__1path (EIO_STATVFS, path, pri, cb, data);
2668}
2669
2670eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
2671{
2672 return eio__1path (EIO_UNLINK, path, pri, cb, data);
2673}
2674
2675eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
2676{
2677 return eio__1path (EIO_RMDIR, path, pri, cb, data);
2678}
2679
2680eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data)
2681{
2682 REQ (EIO_READDIR); PATH; req->int1 = flags; SEND;
2683}
2684
2685eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
2686{
2687 REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND;
2688}
2689
2690static eio_req *
2691eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
2692{
2693 REQ (type); PATH;
2694
2695 req->flags |= EIO_FLAG_PTR2_FREE;
2696 req->ptr2 = strdup (new_path);
2697 if (!req->ptr2)
2698 {
2699 eio_api_destroy (req);
2700 return 0;
2701 }
2702
2703 SEND;
2704}
2705
2706eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
2707{
2708 return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
2709}
2710
2711eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
2712{
2713 return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
2714}
2715
2716eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
2717{
2718 return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
2719}
2720
2721eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data)
2722{
2723 REQ (EIO_CUSTOM); req->feed = execute; SEND;
2724}
2725
2726#endif
2727
2728eio_req *eio_grp (eio_cb cb, void *data)
2729{
2730 const int pri = EIO_PRI_MAX;
2731
2732 REQ (EIO_GROUP); SEND;
2733}
2734
2735#undef REQ
2736#undef PATH
2737#undef SEND
2738
2739/*****************************************************************************/
2740/* grp functions */
1171 2741
1172void 2742void
1173aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1174 PROTOTYPE: $$$$;$
1175 PPCODE:
1176{
1177 dREQ;
1178
1179 req->type = EIO_SENDFILE;
1180 req->sv1 = newSVsv (out_fh);
1181 req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1182 req->sv2 = newSVsv (in_fh);
1183 req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1184 req->offs = SvVAL64 (in_offset);
1185 req->size = length;
1186
1187 EIO_SEND;
1188}
1189
1190void
1191aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1192 PROTOTYPE: $$$;$
1193 PPCODE:
1194{
1195 dREQ;
1196
1197 req->type = EIO_READAHEAD;
1198 req->sv1 = newSVsv (fh);
1199 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1200 req->offs = SvVAL64 (offset);
1201 req->size = length;
1202
1203 EIO_SEND;
1204}
1205
1206void
1207aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1208 ALIAS:
1209 aio_stat = EIO_STAT
1210 aio_lstat = EIO_LSTAT
1211 PPCODE:
1212{
1213 dREQ;
1214
1215 req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1216 if (!req->ptr2)
1217 {
1218 req_destroy (req);
1219 croak ("out of memory during aio_stat statdata allocation");
1220 }
1221
1222 req->flags |= FLAG_PTR2_FREE;
1223 req->sv1 = newSVsv (fh_or_path);
1224
1225 if (SvPOK (fh_or_path))
1226 {
1227 req->type = ix;
1228 req->ptr1 = SvPVbyte_nolen (req->sv1);
1229 }
1230 else
1231 {
1232 req->type = EIO_FSTAT;
1233 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1234 }
1235
1236 EIO_SEND;
1237}
1238
1239void
1240aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
1241 PPCODE:
1242{
1243 dREQ;
1244
1245 req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1246 req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1247 req->sv1 = newSVsv (fh_or_path);
1248
1249 if (SvPOK (fh_or_path))
1250 {
1251 req->type = EIO_UTIME;
1252 req->ptr1 = SvPVbyte_nolen (req->sv1);
1253 }
1254 else
1255 {
1256 req->type = EIO_FUTIME;
1257 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1258 }
1259
1260 EIO_SEND;
1261}
1262
1263void
1264aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
1265 PPCODE:
1266{
1267 dREQ;
1268
1269 req->sv1 = newSVsv (fh_or_path);
1270 req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1271
1272 if (SvPOK (fh_or_path))
1273 {
1274 req->type = EIO_TRUNCATE;
1275 req->ptr1 = SvPVbyte_nolen (req->sv1);
1276 }
1277 else
1278 {
1279 req->type = EIO_FTRUNCATE;
1280 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1281 }
1282
1283 EIO_SEND;
1284}
1285
1286void
1287aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
1288 ALIAS:
1289 aio_chmod = EIO_CHMOD
1290 aio_fchmod = EIO_FCHMOD
1291 aio_mkdir = EIO_MKDIR
1292 PPCODE:
1293{
1294 dREQ;
1295
1296 req->type = type;
1297 req->int2 = mode;
1298 req->sv1 = newSVsv (fh_or_path);
1299
1300 if (ix == EIO_FCHMOD)
1301 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1302 else
1303 req->ptr1 = SvPVbyte_nolen (req->sv1);
1304
1305 EIO_SEND;
1306}
1307
1308void
1309aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
1310 PPCODE:
1311{
1312 dREQ;
1313
1314 req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1315 req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1316 req->sv1 = newSVsv (fh_or_path);
1317
1318 if (SvPOK (fh_or_path))
1319 {
1320 req->type = EIO_CHOWN;
1321 req->ptr1 = SvPVbyte_nolen (req->sv1);
1322 }
1323 else
1324 {
1325 req->type = EIO_FCHOWN;
1326 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1327 }
1328
1329 EIO_SEND;
1330}
1331
1332void
1333aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1334 ALIAS:
1335 aio_unlink = EIO_UNLINK
1336 aio_rmdir = EIO_RMDIR
1337 aio_readdir = EIO_READDIR
1338 PPCODE:
1339{
1340 dREQ;
1341
1342 req->type = ix;
1343 req->sv1 = newSVsv (pathname);
1344 req->ptr1 = SvPVbyte_nolen (req->sv1);
1345
1346 EIO_SEND;
1347}
1348
1349void
1350aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1351 ALIAS:
1352 aio_link = EIO_LINK
1353 aio_symlink = EIO_SYMLINK
1354 aio_rename = EIO_RENAME
1355 PPCODE:
1356{
1357 dREQ;
1358
1359 req->type = ix;
1360 req->sv1 = newSVsv (oldpath);
1361 req->ptr1 = SvPVbyte_nolen (req->sv1);
1362 req->sv2 = newSVsv (newpath);
1363 req->ptr2 = SvPVbyte_nolen (req->sv2);
1364
1365 EIO_SEND;
1366}
1367
1368void
1369aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1370 PPCODE:
1371{
1372 dREQ;
1373
1374 req->type = EIO_MKNOD;
1375 req->sv1 = newSVsv (pathname);
1376 req->ptr1 = SvPVbyte_nolen (req->sv1);
1377 req->int2 = (mode_t)mode;
1378 req->offs = dev;
1379
1380 EIO_SEND;
1381}
1382
1383void
1384aio_busy (double delay, SV *callback=&PL_sv_undef)
1385 PPCODE:
1386{
1387 dREQ;
1388
1389 req->type = EIO_BUSY;
1390 req->nv1 = delay < 0. ? 0. : delay;
1391
1392 EIO_SEND;
1393}
1394
1395void
1396aio_group (SV *callback=&PL_sv_undef)
1397 PROTOTYPE: ;$
1398 PPCODE:
1399{
1400 dREQ;
1401
1402 req->type = EIO_GROUP;
1403
1404 req_send (req);
1405 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1406}
1407
1408void
1409aio_nop (SV *callback=&PL_sv_undef)
1410 ALIAS:
1411 aio_nop = EIO_NOP
1412 aio_sync = EIO_SYNC
1413 PPCODE:
1414{
1415 dREQ;
1416
1417#endif
1418
1419void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit) 2743eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1420{ 2744{
1421 grp->int2 = limit; 2745 grp->int2 = limit;
1422 grp->feed = feed; 2746 grp->feed = feed;
1423 2747
1424 grp_try_feed (grp); 2748 grp_try_feed (grp);
1425} 2749}
1426 2750
2751void
1427void eio_grp_limit (eio_req *grp, int limit) 2752eio_grp_limit (eio_req *grp, int limit)
1428{ 2753{
1429 grp->int2 = limit; 2754 grp->int2 = limit;
1430 2755
1431 grp_try_feed (grp); 2756 grp_try_feed (grp);
1432} 2757}
1433 2758
2759void
1434void eio_grp_add (eio_req *grp, eio_req *req) 2760eio_grp_add (eio_req *grp, eio_req *req)
1435{ 2761{
1436 assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2)); 2762 assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
2763
2764 grp->flags |= EIO_FLAG_GROUPADD;
1437 2765
1438 ++grp->size; 2766 ++grp->size;
1439 req->grp = grp; 2767 req->grp = grp;
1440 2768
1441 req->grp_prev = 0; 2769 req->grp_prev = 0;
… …
1445 grp->grp_first->grp_prev = req; 2773 grp->grp_first->grp_prev = req;
1446 2774
1447 grp->grp_first = req; 2775 grp->grp_first = req;
1448} 2776}
1449 2777
2778/*****************************************************************************/
2779/* misc garbage */
1450 2780
2781eio_ssize_t
2782eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
2783{
2784 return eio__sendfile (ofd, ifd, offset, count);
2785}
2786

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