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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 1.141 by root, Tue Feb 23 19:47:44 2016 UTC

1/*
2 * libeio implementation
3 *
4 * Copyright (c) 2007,2008,2009,2010,2011,2012,2013,2016 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 #define pipe(fds) _pipe (fds, 4096, O_BINARY)
126
127 #define fcntl(fd,cmd,arg) EIO_ENOSYS ()
128 #define ioctl(fd,cmd,arg) EIO_ENOSYS ()
129 #define fchmod(fd,mode) EIO_ENOSYS ()
130 #define chown(path,uid,gid) EIO_ENOSYS ()
131 #define fchown(fd,uid,gid) EIO_ENOSYS ()
132 #define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
133 #define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */
134 #define mknod(path,mode,dev) EIO_ENOSYS ()
135 #define sync() EIO_ENOSYS ()
136 #define readlink(path,buf,s) EIO_ENOSYS ()
137 #define statvfs(path,buf) EIO_ENOSYS ()
138 #define fstatvfs(fd,buf) EIO_ENOSYS ()
139
140 #define pread(fd,buf,count,offset) eio__pread (fd, buf, count, offset)
141 #define pwrite(fd,buf,count,offset) eio__pwrite (fd, buf, count, offset)
142
143 #if __GNUC__
144 typedef long long eio_off_t; /* signed for compatibility to msvc */
145 #else
146 typedef __int64 eio_off_t; /* unsigned not supported by msvc */
147 #endif
148
149 static eio_ssize_t
150 eio__pread (int fd, void *buf, eio_ssize_t count, eio_off_t offset)
151 {
152 OVERLAPPED o = { 0 };
153 DWORD got;
154
155 o.Offset = offset;
156 o.OffsetHigh = offset >> 32;
157
158 return ReadFile ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd), buf, count, &got, &o)
159 ? got : -1;
160 }
161
162 static eio_ssize_t
163 eio__pwrite (int fd, void *buf, eio_ssize_t count, eio_off_t offset)
164 {
165 OVERLAPPED o = { 0 };
166 DWORD got;
167
168 o.Offset = offset;
169 o.OffsetHigh = offset >> 32;
170
171 return WriteFile ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd), buf, count, &got, &o)
172 ? got : -1;
173 }
174
175 /* rename() uses MoveFile, which fails to overwrite */
176 #define rename(old,neu) eio__rename (old, neu)
177
178 static int
179 eio__rename (const char *old, const char *neu)
180 {
181 if (MoveFileEx (old, neu, MOVEFILE_REPLACE_EXISTING))
182 return 0;
183
184 /* should steal _dosmaperr */
185 switch (GetLastError ())
186 {
187 case ERROR_FILE_NOT_FOUND:
188 case ERROR_PATH_NOT_FOUND:
189 case ERROR_INVALID_DRIVE:
190 case ERROR_NO_MORE_FILES:
191 case ERROR_BAD_NETPATH:
192 case ERROR_BAD_NET_NAME:
193 case ERROR_BAD_PATHNAME:
194 case ERROR_FILENAME_EXCED_RANGE:
195 errno = ENOENT;
196 break;
197
198 default:
199 errno = EACCES;
200 break;
201 }
202
203 return -1;
204 }
205
206 /* we could even stat and see if it exists */
207 static int
208 symlink (const char *old, const char *neu)
209 {
210 #if WINVER >= 0x0600
211 if (CreateSymbolicLink (neu, old, 1))
212 return 0;
213
214 if (CreateSymbolicLink (neu, old, 0))
215 return 0;
216 #endif
217
218 return EIO_ERRNO (ENOENT, -1);
219 }
220
221 /* POSIX API only, causing trouble for win32 apps */
222 #define CreateHardLink(neu,old,flags) 0 /* not really creating hardlink, still using relative paths? */
223 #define CreateSymbolicLink(neu,old,flags) 0 /* vista+ only */
224
225 struct statvfs
226 {
227 int dummy;
228 };
229
230 #define DT_DIR EIO_DT_DIR
231 #define DT_REG EIO_DT_REG
232 #define D_NAME(entp) entp.cFileName
233 #define D_TYPE(entp) (entp.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ? DT_DIR : DT_REG)
34 234
35#else 235#else
36 236
37# include "config.h"
38# include <sys/time.h> 237 #include <sys/time.h>
39# include <sys/select.h> 238 #include <sys/select.h>
40# include <unistd.h> 239 #include <unistd.h>
240 #include <signal.h>
241 #include <dirent.h>
242
243 #ifdef ANDROID
244 #include <sys/vfs.h>
245 #define statvfs statfs
246 #define fstatvfs fstatfs
247 #include <asm/page.h> /* supposedly limits.h does #define PAGESIZE PAGESIZE */
248 #else
249 #include <sys/statvfs.h>
250 #endif
251
252 #if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
253 #include <sys/mman.h>
254 #endif
255
256 #define D_NAME(entp) entp->d_name
257
258 /* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
259 #if __FreeBSD__ || __NetBSD__ || __OpenBSD__
260 #define _DIRENT_HAVE_D_TYPE /* sigh */
261 #define D_INO(de) (de)->d_fileno
262 #define D_NAMLEN(de) (de)->d_namlen
263 #elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
264 #define D_INO(de) (de)->d_ino
265 #endif
266
267 #ifdef _D_EXACT_NAMLEN
268 #undef D_NAMLEN
269 #define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
270 #endif
271
272 #ifdef _DIRENT_HAVE_D_TYPE
273 #define D_TYPE(de) (de)->d_type
274 #endif
275
276 #ifndef EIO_STRUCT_DIRENT
277 #define EIO_STRUCT_DIRENT struct dirent
278 #endif
279
280#endif
281
282#if HAVE_UTIMES
41# include <utime.h> 283# include <utime.h>
42# include <signal.h>
43
44# ifndef EIO_STRUCT_DIRENT
45# define EIO_STRUCT_DIRENT struct dirent
46# endif 284#endif
47 285
48#endif 286#if HAVE_SYS_SYSCALL_H
49 287# include <sys/syscall.h>
50# ifndef EIO_STRUCT_STAT
51# define EIO_STRUCT_STAT struct stat
52# endif 288#endif
289
290#if HAVE_SYS_PRCTL_H
291# include <sys/prctl.h>
292#endif
53 293
54#if HAVE_SENDFILE 294#if HAVE_SENDFILE
55# if __linux 295# if __linux
56# include <sys/sendfile.h> 296# include <sys/sendfile.h>
57# elif __freebsd 297# elif __FreeBSD__ || defined __APPLE__
58# include <sys/socket.h> 298# include <sys/socket.h>
59# include <sys/uio.h> 299# include <sys/uio.h>
60# elif __hpux 300# elif __hpux
61# include <sys/socket.h> 301# include <sys/socket.h>
62# elif __solaris /* not yet */ 302# elif __solaris
63# include <sys/sendfile.h> 303# include <sys/sendfile.h>
64# else 304# else
65# error sendfile support requested but not available 305# error sendfile support requested but not available
66# endif 306# endif
67#endif 307#endif
68 308
69/* number of seconds after which an idle threads exit */ 309#ifndef D_TYPE
70#define IDLE_TIMEOUT 10 310# define D_TYPE(de) 0
311#endif
312#ifndef D_INO
313# define D_INO(de) 0
314#endif
315#ifndef D_NAMLEN
316# define D_NAMLEN(entp) strlen (D_NAME (entp))
317#endif
71 318
72/* used for struct dirent, AIX doesn't provide it */ 319/* used for struct dirent, AIX doesn't provide it */
73#ifndef NAME_MAX 320#ifndef NAME_MAX
74# define NAME_MAX 4096 321# define NAME_MAX 4096
75#endif 322#endif
76 323
324/* used for readlink etc. */
325#ifndef PATH_MAX
326# define PATH_MAX 4096
327#endif
328
77/* buffer size for various temporary buffers */ 329/* buffer size for various temporary buffers */
78#define EIO_BUFSIZE 65536 330#define EIO_BUFSIZE 65536
79 331
80#define dBUF \ 332#define dBUF \
81 char *eio_buf; \
82 X_LOCK (wrklock); \
83 self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \ 333 char *eio_buf = malloc (EIO_BUFSIZE); \
84 X_UNLOCK (wrklock); \ 334 errno = ENOMEM; \
85 if (!eio_buf) \ 335 if (!eio_buf) \
86 return -1; 336 return -1
87 337
88#define EIO_TICKS ((1000000 + 1023) >> 10) 338#define FUBd \
339 free (eio_buf)
89 340
90static void (*want_poll_cb) (void); 341/*****************************************************************************/
91static void (*done_poll_cb) (void);
92 342
93static unsigned int max_poll_time = 0; 343struct etp_tmpbuf;
94static unsigned int max_poll_reqs = 0;
95 344
96/* calculcate time difference in ~1/EIO_TICKS of a second */ 345#if _POSIX_VERSION >= 200809L
97static int tvdiff (struct timeval *tv1, struct timeval *tv2) 346 #define HAVE_AT 1
98{ 347 #define WD2FD(wd) ((wd) ? (wd)->fd : AT_FDCWD)
99 return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS 348 #ifndef O_SEARCH
100 + ((tv2->tv_usec - tv1->tv_usec) >> 10); 349 #define O_SEARCH O_RDONLY
101} 350 #endif
351#else
352 #define HAVE_AT 0
353 static const char *wd_expand (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path);
354#endif
102 355
103static unsigned int started, idle, wanted; 356struct eio_pwd
104
105/* worker threads management */
106static mutex_t wrklock = X_MUTEX_INIT;
107
108typedef struct worker {
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)
123{ 357{
124 if (wrk->dirp) 358#if HAVE_AT
125 { 359 int fd;
126 closedir (wrk->dirp); 360#endif
127 wrk->dirp = 0;
128 }
129
130 if (wrk->dbuf)
131 {
132 free (wrk->dbuf);
133 wrk->dbuf = 0;
134 }
135}
136
137static void worker_free (worker *wrk)
138{
139 wrk->next->prev = wrk->prev;
140 wrk->prev->next = wrk->next;
141
142 free (wrk);
143}
144
145static volatile unsigned int nreqs, nready, npending;
146static volatile unsigned int max_idle = 4;
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{
154 return nreqs;
155}
156
157unsigned int eio_nready (void)
158{
159 unsigned int retval;
160
161 if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
162 retval = nready;
163 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
164
165 return retval;
166}
167
168unsigned int eio_npending (void)
169{
170 unsigned int retval;
171
172 if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
173 retval = npending;
174 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
175
176 return retval;
177}
178
179unsigned int eio_nthreads (void)
180{
181 unsigned int retval;
182
183 if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
184 retval = started;
185 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
186
187 return retval;
188}
189
190/*
191 * a somewhat faster data structure might be nice, but
192 * with 8 priorities this actually needs <20 insns
193 * per shift, the most expensive operation.
194 */
195typedef struct {
196 eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */
197 int size; 361 int len;
198} reqq; 362 char str[1]; /* actually, a 0-terminated canonical path */
363};
199 364
200static reqq req_queue; 365/*****************************************************************************/
201static reqq res_queue;
202 366
203static int reqq_push (reqq *q, eio_req *req) 367#define ETP_PRI_MIN EIO_PRI_MIN
204{ 368#define ETP_PRI_MAX EIO_PRI_MAX
205 int pri = req->pri;
206 req->next = 0;
207 369
208 if (q->qe[pri]) 370#define ETP_TYPE_QUIT -1
209 { 371#define ETP_TYPE_GROUP EIO_GROUP
210 q->qe[pri]->next = req;
211 q->qe[pri] = req;
212 }
213 else
214 q->qe[pri] = q->qs[pri] = req;
215 372
216 return q->size++; 373static void eio_nop_callback (void) { }
217} 374static void (*eio_want_poll_cb)(void) = eio_nop_callback;
375static void (*eio_done_poll_cb)(void) = eio_nop_callback;
218 376
219static eio_req *reqq_shift (reqq *q) 377#define ETP_WANT_POLL(pool) eio_want_poll_cb ()
220{ 378#define ETP_DONE_POLL(pool) eio_done_poll_cb ()
221 int pri;
222 379
223 if (!q->size) 380struct etp_worker;
224 return 0; 381#define ETP_REQ eio_req
382#define ETP_DESTROY(req) eio_destroy (req)
383static int eio_finish (eio_req *req);
384#define ETP_FINISH(req) eio_finish (req)
385static void eio_execute (struct etp_worker *self, eio_req *req);
386#define ETP_EXECUTE(wrk,req) eio_execute (wrk, req)
225 387
226 --q->size; 388#include "etp.c"
227 389
228 for (pri = EIO_NUM_PRI; pri--; ) 390static struct etp_pool eio_pool;
229 { 391#define EIO_POOL (&eio_pool)
230 eio_req *req = q->qs[pri];
231 392
232 if (req) 393/*****************************************************************************/
233 {
234 if (!(q->qs[pri] = (eio_req *)req->next))
235 q->qe[pri] = 0;
236 394
237 return req; 395static void
238 }
239 }
240
241 abort ();
242}
243
244static void grp_try_feed (eio_req *grp) 396grp_try_feed (eio_req *grp)
245{ 397{
246 while (grp->size < grp->int2 && !EIO_CANCELLED (grp)) 398 while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
247 { 399 {
248 int old_len = grp->size; 400 grp->flags &= ~ETP_FLAG_GROUPADD;
249 401
250 EIO_FEED (grp); 402 EIO_FEED (grp);
251 403
252 /* stop if no progress has been made */ 404 /* stop if no progress has been made */
253 if (old_len == grp->size) 405 if (!(grp->flags & ETP_FLAG_GROUPADD))
254 { 406 {
255 grp->feed = 0; 407 grp->feed = 0;
256 break; 408 break;
257 } 409 }
258 } 410 }
259} 411}
260 412
261static int eio_finish (eio_req *req); 413static int
262
263static int grp_dec (eio_req *grp) 414grp_dec (eio_req *grp)
264{ 415{
265 --grp->size; 416 --grp->size;
266 417
267 /* call feeder, if applicable */ 418 /* call feeder, if applicable */
268 grp_try_feed (grp); 419 grp_try_feed (grp);
269 420
270 /* finish, if done */ 421 /* finish, if done */
271 if (!grp->size && grp->int1) 422 if (!grp->size && grp->flags & ETP_FLAG_DELAYED)
272 return eio_finish (grp); 423 return eio_finish (grp);
273 else 424 else
274 return 0; 425 return 0;
275} 426}
276 427
428static void
277void eio_destroy (eio_req *req) 429eio_destroy (eio_req *req)
278{ 430{
431 if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
279 if ((req)->flags & EIO_FLAG_PTR2_FREE) 432 if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
280 free (req->ptr2);
281 433
282 EIO_DESTROY (req); 434 EIO_DESTROY (req);
283} 435}
284 436
437static int
285static int eio_finish (eio_req *req) 438eio_finish (eio_req *req)
286{ 439{
287 int res = EIO_FINISH (req); 440 int res = EIO_FINISH (req);
288 441
289 if (req->grp) 442 if (req->grp)
290 { 443 {
… …
298 if (grp->grp_first == req) 451 if (grp->grp_first == req)
299 grp->grp_first = req->grp_next; 452 grp->grp_first = req->grp_next;
300 453
301 res2 = grp_dec (grp); 454 res2 = grp_dec (grp);
302 455
303 if (!res && res2) 456 if (!res)
304 res = res2; 457 res = res2;
305 } 458 }
306 459
307 eio_destroy (req); 460 eio_destroy (req);
308 461
309 return res; 462 return res;
310} 463}
311 464
465void
312void eio_grp_cancel (eio_req *grp) 466eio_grp_cancel (eio_req *grp)
313{ 467{
314 for (grp = grp->grp_first; grp; grp = grp->grp_next) 468 etp_grp_cancel (EIO_POOL, grp);
315 eio_cancel (grp);
316} 469}
317 470
471void
318void eio_cancel (eio_req *req) 472eio_cancel (eio_req *req)
319{ 473{
320 req->flags |= EIO_FLAG_CANCELLED; 474 etp_cancel (EIO_POOL, req);
321
322 eio_grp_cancel (req);
323} 475}
324 476
325X_THREAD_PROC (eio_proc); 477void
326
327static void start_thread (void)
328{
329 worker *wrk = calloc (1, sizeof (worker));
330
331 if (!wrk)
332 croak ("unable to allocate worker thread data");
333
334 X_LOCK (wrklock);
335
336 if (thread_create (&wrk->tid, eio_proc, (void *)wrk))
337 {
338 wrk->prev = &wrk_first;
339 wrk->next = wrk_first.next;
340 wrk_first.next->prev = wrk;
341 wrk_first.next = wrk;
342 ++started;
343 }
344 else
345 free (wrk);
346
347 X_UNLOCK (wrklock);
348}
349
350static void maybe_start_thread (void)
351{
352 if (eio_nthreads () >= wanted)
353 return;
354
355 /* todo: maybe use idle here, but might be less exact */
356 if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())
357 return;
358
359 start_thread ();
360}
361
362void eio_submit (eio_req *req) 478eio_submit (eio_req *req)
363{ 479{
364 ++nreqs; 480 etp_submit (EIO_POOL, req);
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} 481}
374 482
375static void end_thread (void) 483unsigned int
484eio_nreqs (void)
376{ 485{
377 eio_req *req = calloc (1, sizeof (eio_req)); 486 return etp_nreqs (EIO_POOL);
378
379 req->type = EIO_QUIT;
380 req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;
381
382 X_LOCK (reqlock);
383 reqq_push (&req_queue, req);
384 X_COND_SIGNAL (reqwait);
385 X_UNLOCK (reqlock);
386
387 X_LOCK (wrklock);
388 --started;
389 X_UNLOCK (wrklock);
390} 487}
391 488
489unsigned int
490eio_nready (void)
491{
492 return etp_nready (EIO_POOL);
493}
494
495unsigned int
496eio_npending (void)
497{
498 return etp_npending (EIO_POOL);
499}
500
501unsigned int ecb_cold
502eio_nthreads (void)
503{
504 return etp_nthreads (EIO_POOL);
505}
506
507void ecb_cold
392void eio_set_max_poll_time (double nseconds) 508eio_set_max_poll_time (double nseconds)
393{ 509{
394 if (WORDACCESS_UNSAFE) X_LOCK (reqlock); 510 etp_set_max_poll_time (EIO_POOL, nseconds);
395 max_poll_time = nseconds;
396 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
397} 511}
398 512
513void ecb_cold
399void eio_set_max_poll_reqs (unsigned int maxreqs) 514eio_set_max_poll_reqs (unsigned int maxreqs)
400{ 515{
401 if (WORDACCESS_UNSAFE) X_LOCK (reqlock); 516 etp_set_max_poll_reqs (EIO_POOL, maxreqs);
402 max_poll_reqs = maxreqs;
403 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
404} 517}
405 518
519void ecb_cold
406void eio_set_max_idle (unsigned int nthreads) 520eio_set_max_idle (unsigned int nthreads)
407{ 521{
408 if (WORDACCESS_UNSAFE) X_LOCK (reqlock); 522 etp_set_max_idle (EIO_POOL, nthreads);
409 max_idle = nthreads <= 0 ? 1 : nthreads;
410 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
411} 523}
412 524
525void ecb_cold
526eio_set_idle_timeout (unsigned int seconds)
527{
528 etp_set_idle_timeout (EIO_POOL, seconds);
529}
530
531void ecb_cold
413void eio_set_min_parallel (unsigned int nthreads) 532eio_set_min_parallel (unsigned int nthreads)
414{ 533{
415 if (wanted < nthreads) 534 etp_set_min_parallel (EIO_POOL, nthreads);
416 wanted = nthreads;
417} 535}
418 536
537void ecb_cold
419void eio_set_max_parallel (unsigned int nthreads) 538eio_set_max_parallel (unsigned int nthreads)
420{ 539{
421 if (wanted > nthreads) 540 etp_set_max_parallel (EIO_POOL, nthreads);
422 wanted = nthreads;
423
424 while (started > wanted)
425 end_thread ();
426} 541}
427 542
428int eio_poll (void) 543int eio_poll (void)
429{ 544{
430 int maxreqs = max_poll_reqs; 545 return etp_poll (EIO_POOL);
431 struct timeval tv_start, tv_now;
432 eio_req *req;
433
434 if (max_poll_time)
435 gettimeofday (&tv_start, 0);
436
437 for (;;)
438 {
439 maybe_start_thread ();
440
441 X_LOCK (reslock);
442 req = reqq_shift (&res_queue);
443
444 if (req)
445 {
446 --npending;
447
448 if (!res_queue.size && done_poll_cb)
449 done_poll_cb ();
450 }
451
452 X_UNLOCK (reslock);
453
454 if (!req)
455 return 0;
456
457 --nreqs;
458
459 if (req->type == EIO_GROUP && req->size)
460 {
461 req->int1 = 1; /* mark request as delayed */
462 continue;
463 }
464 else
465 {
466 int res = eio_finish (req);
467 if (res)
468 return res;
469 }
470
471 if (maxreqs && !--maxreqs)
472 break;
473
474 if (max_poll_time)
475 {
476 gettimeofday (&tv_now, 0);
477
478 if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
479 break;
480 }
481 }
482
483 errno = EAGAIN;
484 return -1;
485} 546}
486 547
487/*****************************************************************************/ 548/*****************************************************************************/
488/* work around various missing functions */ 549/* work around various missing functions */
489 550
490#if !HAVE_PREADWRITE
491# define pread aio_pread
492# define pwrite aio_pwrite
493
494/*
495 * make our pread/pwrite safe against themselves, but not against
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{
503 ssize_t res;
504 off_t ooffset;
505
506 X_LOCK (preadwritelock);
507 ooffset = lseek (fd, 0, SEEK_CUR);
508 lseek (fd, offset, SEEK_SET);
509 res = read (fd, buf, count);
510 lseek (fd, ooffset, SEEK_SET);
511 X_UNLOCK (preadwritelock);
512
513 return res;
514}
515
516static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
517{
518 ssize_t res;
519 off_t ooffset;
520
521 X_LOCK (preadwritelock);
522 ooffset = lseek (fd, 0, SEEK_CUR);
523 lseek (fd, offset, SEEK_SET);
524 res = write (fd, buf, count);
525 lseek (fd, offset, SEEK_SET);
526 X_UNLOCK (preadwritelock);
527
528 return res;
529}
530#endif
531
532#ifndef HAVE_FUTIMES 551#ifndef HAVE_UTIMES
533 552
553# undef utimes
534# define utimes(path,times) aio_utimes (path, times) 554# define utimes(path,times) eio__utimes (path, times)
535# define futimes(fd,times) aio_futimes (fd, times)
536 555
556static int
537static int aio_utimes (const char *filename, const struct timeval times[2]) 557eio__utimes (const char *filename, const struct timeval times[2])
538{ 558{
539 if (times) 559 if (times)
540 { 560 {
541 struct utimbuf buf; 561 struct utimbuf buf;
542 562
… …
547 } 567 }
548 else 568 else
549 return utime (filename, 0); 569 return utime (filename, 0);
550} 570}
551 571
572#endif
573
574#ifndef HAVE_FUTIMES
575
576# undef futimes
577# define futimes(fd,times) eio__futimes (fd, times)
578
579static int
552static int aio_futimes (int fd, const struct timeval tv[2]) 580eio__futimes (int fd, const struct timeval tv[2])
553{ 581{
554 errno = ENOSYS; 582 errno = ENOSYS;
555 return -1; 583 return -1;
556} 584}
557 585
558#endif 586#endif
559 587
560#if !HAVE_FDATASYNC 588#if !HAVE_FDATASYNC
589# undef fdatasync
561# define fdatasync fsync 590# define fdatasync(fd) fsync (fd)
562#endif 591#endif
592
593static int
594eio__syncfs (int fd)
595{
596 int res;
597
598#if HAVE_SYS_SYNCFS
599 res = (int)syscall (__NR_syncfs, (int)(fd));
600#else
601 res = EIO_ENOSYS ();
602#endif
603
604 if (res < 0 && errno == ENOSYS && fd >= 0)
605 sync ();
606
607 return res;
608}
609
610/* sync_file_range always needs emulation */
611static int
612eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
613{
614#if HAVE_SYNC_FILE_RANGE
615 int res;
616
617 if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE
618 || EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE
619 || EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER)
620 {
621 flags = 0
622 | (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0)
623 | (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0)
624 | (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0);
625 }
626
627 res = sync_file_range (fd, offset, nbytes, flags);
628
629 if (!res || errno != ENOSYS)
630 return res;
631#endif
632
633 /* even though we could play tricks with the flags, it's better to always
634 * call fdatasync, as that matches the expectation of its users best */
635 return fdatasync (fd);
636}
637
638static int
639eio__fallocate (int fd, int mode, off_t offset, size_t len)
640{
641#if HAVE_LINUX_FALLOCATE
642 return fallocate (fd, mode, offset, len);
643#else
644 return EIO_ENOSYS ();
645#endif
646}
563 647
564#if !HAVE_READAHEAD 648#if !HAVE_READAHEAD
649# undef readahead
565# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self) 650# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
566 651
652static eio_ssize_t
567static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self) 653eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
568{ 654{
569 size_t todo = count; 655 size_t todo = count;
570 dBUF; 656 dBUF;
571 657
572 while (todo > 0) 658 while (todo > 0)
573 { 659 {
574 size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE; 660 size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE;
575 661
576 pread (fd, aio_buf, len, offset); 662 pread (fd, eio_buf, len, offset);
577 offset += len; 663 offset += len;
578 todo -= len; 664 todo -= len;
579 } 665 }
580 666
581 errno = 0; 667 FUBd;
668
669 /* linux's readahead basically only fails for EBADF or EINVAL (not mmappable) */
670 /* but not for e.g. EIO or eof, so we also never fail */
582 return count; 671 return 0;
583} 672}
584 673
585#endif
586
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 674#endif
616 675
617/* sendfile always needs emulation */ 676/* sendfile always needs emulation */
677static eio_ssize_t
618static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self) 678eio__sendfile (int ofd, int ifd, off_t offset, size_t count)
619{ 679{
680 eio_ssize_t written = 0;
620 ssize_t res; 681 eio_ssize_t res;
621 682
622 if (!count) 683 if (!count)
623 return 0; 684 return 0;
624 685
686 for (;;)
687 {
688#ifdef __APPLE__
689# undef HAVE_SENDFILE /* broken, as everything on os x */
690#endif
625#if HAVE_SENDFILE 691#if HAVE_SENDFILE
626# if __linux 692# if __linux
693 off_t soffset = offset;
627 res = sendfile (ofd, ifd, &offset, count); 694 res = sendfile (ofd, ifd, &soffset, count);
628 695
629# elif __freebsd 696# elif __FreeBSD__
630 /* 697 /*
631 * Of course, the freebsd sendfile is a dire hack with no thoughts 698 * Of course, the freebsd sendfile is a dire hack with no thoughts
632 * wasted on making it similar to other I/O functions. 699 * wasted on making it similar to other I/O functions.
633 */ 700 */
634 {
635 off_t sbytes; 701 off_t sbytes;
636 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); 702 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
637 703
638 if (res < 0 && sbytes) 704 #if 0 /* according to the manpage, this is correct, but broken behaviour */
639 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */ 705 /* freebsd' sendfile will return 0 on success */
706 /* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */
707 /* not on e.g. EIO or EPIPE - sounds broken */
708 if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0)
640 res = sbytes; 709 res = sbytes;
641 } 710 #endif
711
712 /* according to source inspection, this is correct, and useful behaviour */
713 if (sbytes)
714 res = sbytes;
715
716# elif defined __APPLE__
717 off_t sbytes = count;
718 res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
719
720 /* according to the manpage, sbytes is always valid */
721 if (sbytes)
722 res = sbytes;
642 723
643# elif __hpux 724# elif __hpux
644 res = sendfile (ofd, ifd, offset, count, 0, 0); 725 res = sendfile (ofd, ifd, offset, count, 0, 0);
645 726
646# elif __solaris 727# elif __solaris
647 {
648 struct sendfilevec vec; 728 struct sendfilevec vec;
649 size_t sbytes; 729 size_t sbytes;
650 730
651 vec.sfv_fd = ifd; 731 vec.sfv_fd = ifd;
652 vec.sfv_flag = 0; 732 vec.sfv_flag = 0;
653 vec.sfv_off = offset; 733 vec.sfv_off = offset;
654 vec.sfv_len = count; 734 vec.sfv_len = count;
655 735
656 res = sendfilev (ofd, &vec, 1, &sbytes); 736 res = sendfilev (ofd, &vec, 1, &sbytes);
657 737
658 if (res < 0 && sbytes) 738 if (res < 0 && sbytes)
659 res = sbytes; 739 res = sbytes;
660 }
661 740
662# endif 741# endif
742
743#elif defined (_WIN32) && 0
744 /* does not work, just for documentation of what would need to be done */
745 /* actually, cannot be done like this, as TransmitFile changes the file offset, */
746 /* libeio guarantees that the file offset does not change, and windows */
747 /* has no way to get an independent handle to the same file description */
748 HANDLE h = TO_SOCKET (ifd);
749 SetFilePointer (h, offset, 0, FILE_BEGIN);
750 res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
751
663#else 752#else
664 res = -1; 753 res = EIO_ENOSYS ();
665 errno = ENOSYS;
666#endif 754#endif
667 755
756 /* we assume sendfile can copy at least 128mb in one go */
757 if (res <= 128 * 1024 * 1024)
758 {
759 if (res > 0)
760 written += res;
761
762 if (written)
763 return written;
764
765 break;
766 }
767 else
768 {
769 /* if we requested more, then probably the kernel was lazy */
770 written += res;
771 offset += res;
772 count -= res;
773
774 if (!count)
775 return written;
776 }
777 }
778
668 if (res < 0 779 if (res < 0
669 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK 780 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
781 /* BSDs */
782#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */
783 || errno == ENOTSUP
784#endif
785#ifdef EOPNOTSUPP /* windows */
786 || errno == EOPNOTSUPP /* BSDs */
787#endif
670#if __solaris 788#if __solaris
671 || errno == EAFNOSUPPORT || errno == EPROTOTYPE 789 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
672#endif 790#endif
673 ) 791 )
674 ) 792 )
… …
678 796
679 res = 0; 797 res = 0;
680 798
681 while (count) 799 while (count)
682 { 800 {
683 ssize_t cnt; 801 eio_ssize_t cnt;
684 802
685 cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset); 803 cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);
686 804
687 if (cnt <= 0) 805 if (cnt <= 0)
688 { 806 {
… …
700 818
701 offset += cnt; 819 offset += cnt;
702 res += cnt; 820 res += cnt;
703 count -= cnt; 821 count -= cnt;
704 } 822 }
823
824 FUBd;
705 } 825 }
706 826
707 return res; 827 return res;
708} 828}
709 829
710/* read a full directory */ 830#ifdef PAGESIZE
711static void scandir_ (eio_req *req, worker *self) 831# define eio_pagesize() PAGESIZE
832#else
833static intptr_t
834eio_pagesize (void)
712{ 835{
713 DIR *dirp; 836 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;
724 837
725 X_LOCK (wrklock); 838 if (!page)
726 self->dirp = dirp = opendir (req->ptr1); 839 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);
731 840
732 if (dirp && u && names) 841 return page;
733 for (;;) 842}
843#endif
844
845static void
846eio_page_align (void **addr, size_t *length)
847{
848 intptr_t mask = eio_pagesize () - 1;
849
850 /* round down addr */
851 intptr_t adj = mask & (intptr_t)*addr;
852
853 *addr = (void *)((intptr_t)*addr - adj);
854 *length += adj;
855
856 /* round up length */
857 *length = (*length + mask) & ~mask;
858}
859
860#if !_POSIX_MEMLOCK
861# define eio__mlockall(a) EIO_ENOSYS ()
862#else
863
864static int
865eio__mlockall (int flags)
866{
867 #if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
868 extern int mallopt (int, int);
869 mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
870 #endif
871
872 if (EIO_MCL_CURRENT != MCL_CURRENT
873 || EIO_MCL_FUTURE != MCL_FUTURE)
874 {
875 flags = 0
876 | (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0)
877 | (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0);
878 }
879
880 return mlockall (flags);
881}
882#endif
883
884#if !_POSIX_MEMLOCK_RANGE
885# define eio__mlock(a,b) EIO_ENOSYS ()
886#else
887
888static int
889eio__mlock (void *addr, size_t length)
890{
891 eio_page_align (&addr, &length);
892
893 return mlock (addr, length);
894}
895
896#endif
897
898#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
899# define eio__msync(a,b,c) EIO_ENOSYS ()
900#else
901
902static int
903eio__msync (void *mem, size_t len, int flags)
904{
905 eio_page_align (&mem, &len);
906
907 if (EIO_MS_ASYNC != MS_SYNC
908 || EIO_MS_INVALIDATE != MS_INVALIDATE
909 || EIO_MS_SYNC != MS_SYNC)
910 {
911 flags = 0
912 | (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
913 | (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
914 | (flags & EIO_MS_SYNC ? MS_SYNC : 0);
915 }
916
917 return msync (mem, len, flags);
918}
919
920#endif
921
922static int
923eio__mtouch (eio_req *req)
924{
925 void *mem = req->ptr2;
926 size_t len = req->size;
927 int flags = req->int1;
928
929 eio_page_align (&mem, &len);
930
931 {
932 intptr_t addr = (intptr_t)mem;
933 intptr_t end = addr + len;
934 intptr_t page = eio_pagesize ();
935
936 if (addr < end)
937 if (flags & EIO_MT_MODIFY) /* modify */
938 do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req));
939 else
940 do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req));
941 }
942
943 return 0;
944}
945
946/*****************************************************************************/
947/* requests implemented outside eio_execute, because they are so large */
948
949static void
950eio__lseek (eio_req *req)
951{
952 /* this usually gets optimised away completely, or your compiler sucks, */
953 /* or the whence constants really are not 0, 1, 2 */
954 int whence = req->int2 == EIO_SEEK_SET ? SEEK_SET
955 : req->int2 == EIO_SEEK_CUR ? SEEK_CUR
956 : req->int2 == EIO_SEEK_END ? SEEK_END
957 : req->int2;
958
959 req->offs = lseek (req->int1, req->offs, whence);
960 req->result = req->offs == (off_t)-1 ? -1 : 0;
961}
962
963/* result will always end up in tmpbuf, there is always space for adding a 0-byte */
964static int
965eio__realpath (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path)
966{
967 char *res;
968 const char *rel = path;
969 char *tmp1, *tmp2;
970#if SYMLOOP_MAX > 32
971 int symlinks = SYMLOOP_MAX;
972#else
973 int symlinks = 32;
974#endif
975
976 errno = EINVAL;
977 if (!rel)
978 return -1;
979
980 errno = ENOENT;
981 if (!*rel)
982 return -1;
983
984 res = etp_tmpbuf_get (tmpbuf, PATH_MAX * 3);
985#ifdef _WIN32
986 if (_access (rel, 4) != 0)
987 return -1;
988
989 symlinks = GetFullPathName (rel, PATH_MAX * 3, res, 0);
990
991 errno = ENAMETOOLONG;
992 if (symlinks >= PATH_MAX * 3)
993 return -1;
994
995 errno = EIO;
996 if (symlinks <= 0)
997 return -1;
998
999 return symlinks;
1000
1001#else
1002 tmp1 = res + PATH_MAX;
1003 tmp2 = tmp1 + PATH_MAX;
1004
1005#if 0 /* disabled, the musl way to do things is just too racy */
1006#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
1007 /* on linux we may be able to ask the kernel */
1008 {
1009 int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME);
1010
1011 if (fd >= 0)
734 { 1012 {
1013 sprintf (tmp1, "/proc/self/fd/%d", fd);
1014 req->result = readlink (tmp1, res, PATH_MAX);
1015 /* here we should probably stat the open file and the disk file, to make sure they still match */
1016 close (fd);
1017
1018 if (req->result > 0)
1019 goto done;
1020 }
1021 else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)
1022 return -1;
1023 }
1024#endif
1025#endif
1026
1027 if (*rel != '/')
1028 {
1029 int len;
1030
735 errno = 0; 1031 errno = ENOENT;
736 readdir_r (dirp, &u->d, &entp); 1032 if (wd == EIO_INVALID_WD)
1033 return -1;
1034
1035 if (wd == EIO_CWD)
1036 {
1037 if (!getcwd (res, PATH_MAX))
1038 return -1;
737 1039
738 if (!entp) 1040 len = strlen (res);
1041 }
1042 else
1043 memcpy (res, wd->str, len = wd->len);
1044
1045 if (res [1]) /* only use if not / */
1046 res += len;
1047 }
1048
1049 while (*rel)
1050 {
1051 eio_ssize_t len, linklen;
1052 const char *beg = rel;
1053
1054 while (*rel && *rel != '/')
1055 ++rel;
1056
1057 len = rel - beg;
1058
1059 if (!len) /* skip slashes */
1060 {
739 break; 1061 ++rel;
1062 continue;
1063 }
740 1064
741 name = entp->d_name; 1065 if (beg [0] == '.')
1066 {
1067 if (len == 1)
1068 continue; /* . - nop */
742 1069
743 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) 1070 if (beg [1] == '.' && len == 2)
1071 {
1072 /* .. - back up one component, if possible */
1073
1074 while (res != tmpbuf->ptr)
1075 if (*--res == '/')
1076 break;
1077
1078 continue;
1079 }
1080 }
1081
1082 errno = ENAMETOOLONG;
1083 if (res + 1 + len + 1 >= tmp1)
1084 return -1;
1085
1086 /* copy one component */
1087 *res = '/';
1088 memcpy (res + 1, beg, len);
1089
1090 /* zero-terminate, for readlink */
1091 res [len + 1] = 0;
1092
1093 /* now check if it's a symlink */
1094 linklen = readlink (tmpbuf->ptr, tmp1, PATH_MAX);
1095
1096 if (linklen < 0)
744 { 1097 {
745 int len = strlen (name) + 1; 1098 if (errno != EINVAL)
1099 return -1;
746 1100
747 res++; 1101 /* 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; 1102 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 } 1103 }
1120 else 1104 else
1121 { 1105 {
1122 /* read: grow scalar as necessary */ 1106 /* yay, it was a symlink - build new path in tmp2 */
1123 svptr = SvGROW (data, len + dataoffset + 1); 1107 int rellen = strlen (rel);
1108
1109 errno = ENAMETOOLONG;
1110 if (linklen + 1 + rellen >= PATH_MAX)
1111 return -1;
1112
1113 errno = ELOOP;
1114 if (!--symlinks)
1115 return -1;
1116
1117 if (*tmp1 == '/')
1118 res = tmpbuf->ptr; /* symlink resolves to an absolute path */
1119
1120 /* we need to be careful, as rel might point into tmp2 already */
1121 memmove (tmp2 + linklen + 1, rel, rellen + 1);
1122 tmp2 [linklen] = '/';
1123 memcpy (tmp2, tmp1, linklen);
1124
1125 rel = tmp2;
1124 } 1126 }
1127 }
1125 1128
1129 /* special case for the lone root path */
1130 if (res == tmpbuf->ptr)
1131 *res++ = '/';
1132
1133 return res - (char *)tmpbuf->ptr;
1134#endif
1135}
1136
1137static signed char
1138eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
1139{
1140 return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */
1141 : a->inode < b->inode ? -1
1142 : a->inode > b->inode ? 1
1143 : 0;
1144}
1145
1146#define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0
1147
1148#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */
1149#define EIO_SORT_FAST 60 /* when to only use insertion sort */
1150
1151static void
1152eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits)
1153{
1154 unsigned char bits [9 + sizeof (eio_ino_t) * 8];
1155 unsigned char *bit = bits;
1156
1157 assert (CHAR_BIT == 8);
1158 assert (sizeof (eio_dirent) * 8 < 256);
1159 assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */
1160 assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */
1161
1162 if (size <= EIO_SORT_FAST)
1163 return;
1164
1165 /* first prepare an array of bits to test in our radix sort */
1166 /* try to take endianness into account, as well as differences in eio_ino_t sizes */
1167 /* inode_bits must contain all inodes ORed together */
1168 /* which is used to skip bits that are 0 everywhere, which is very common */
1169 {
1170 eio_ino_t endianness;
1171 int i, j;
1172
1173 /* we store the byte offset of byte n into byte n of "endianness" */
1174 for (i = 0; i < sizeof (eio_ino_t); ++i)
1175 ((unsigned char *)&endianness)[i] = i;
1176
1177 *bit++ = 0;
1178
1179 for (i = 0; i < sizeof (eio_ino_t); ++i)
1180 {
1181 /* shifting off the byte offsets out of "endianness" */
1182 int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8;
1183 endianness >>= 8;
1184
1185 for (j = 0; j < 8; ++j)
1186 if (inode_bits & (((eio_ino_t)1) << (i * 8 + j)))
1187 *bit++ = offs + j;
1188 }
1189
1190 for (j = 0; j < 8; ++j)
1191 if (score_bits & (1 << j))
1192 *bit++ = offsetof (eio_dirent, score) * 8 + j;
1193 }
1194
1195 /* now actually do the sorting (a variant of MSD radix sort) */
1196 {
1197 eio_dirent *base_stk [9 + sizeof (eio_ino_t) * 8], *base;
1198 eio_dirent *end_stk [9 + sizeof (eio_ino_t) * 8], *end;
1199 unsigned char *bit_stk [9 + sizeof (eio_ino_t) * 8];
1200 int stk_idx = 0;
1201
1202 base_stk [stk_idx] = dents;
1203 end_stk [stk_idx] = dents + size;
1204 bit_stk [stk_idx] = bit - 1;
1205
1206 do
1207 {
1208 base = base_stk [stk_idx];
1209 end = end_stk [stk_idx];
1210 bit = bit_stk [stk_idx];
1211
1212 for (;;)
1213 {
1214 unsigned char O = *bit >> 3;
1215 unsigned char M = 1 << (*bit & 7);
1216
1217 eio_dirent *a = base;
1218 eio_dirent *b = end;
1219
1220 if (b - a < EIO_SORT_CUTOFF)
1221 break;
1222
1223 /* now bit-partition the array on the bit */
1224 /* this ugly asymmetric loop seems to perform much better than typical */
1225 /* partition algos found in the literature */
1226 do
1227 if (!(((unsigned char *)a)[O] & M))
1228 ++a;
1229 else if (!(((unsigned char *)--b)[O] & M))
1230 {
1231 eio_dirent tmp = *a; *a = *b; *b = tmp;
1232 ++a;
1233 }
1234 while (b > a);
1235
1236 /* next bit, or stop, if no bits left in this path */
1237 if (!*--bit)
1238 break;
1239
1240 base_stk [stk_idx] = a;
1241 end_stk [stk_idx] = end;
1242 bit_stk [stk_idx] = bit;
1243 ++stk_idx;
1244
1245 end = a;
1246 }
1247 }
1248 while (stk_idx--);
1249 }
1250}
1251
1252static void
1253eio_dent_insertion_sort (eio_dirent *dents, int size)
1254{
1255 /* first move the smallest element to the front, to act as a sentinel */
1256 {
1257 int i;
1258 eio_dirent *min = dents;
1259
1260 /* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */
1261 for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; )
1262 if (EIO_DENT_CMP (dents [i], <, *min))
1263 min = &dents [i];
1264
1265 /* swap elements 0 and j (minimum) */
1266 {
1267 eio_dirent tmp = *dents; *dents = *min; *min = tmp;
1268 }
1269 }
1270
1271 /* then do standard insertion sort, assuming that all elements are >= dents [0] */
1272 {
1273 eio_dirent *i, *j;
1274
1275 for (i = dents + 1; i < dents + size; ++i)
1276 {
1277 eio_dirent value = *i;
1278
1279 for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j)
1280 j [1] = j [0];
1281
1282 j [1] = value;
1283 }
1284 }
1285}
1286
1287static void
1288eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits)
1289{
1290 if (size <= 1)
1291 return; /* our insertion sort relies on size > 0 */
1292
1293 /* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */
1294 /* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */
1295 eio_dent_radix_sort (dents, size, score_bits, inode_bits);
1296
1297 /* use an insertion sort at the end, or for small arrays, */
1298 /* as insertion sort is more efficient for small partitions */
1299 eio_dent_insertion_sort (dents, size);
1300}
1301
1302/* read a full directory */
1303static void
1304eio__scandir (eio_req *req, etp_worker *self)
1305{
1306 char *name, *names;
1307 int namesalloc = 4096 - sizeof (void *) * 4;
1308 int namesoffs = 0;
1309 int flags = req->int1;
1310 eio_dirent *dents = 0;
1311 int dentalloc = 128;
1312 int dentoffs = 0;
1313 eio_ino_t inode_bits = 0;
1314#ifdef _WIN32
1315 HANDLE dirp;
1316 WIN32_FIND_DATA entp;
1317#else
1318 DIR *dirp;
1319 EIO_STRUCT_DIRENT *entp;
1320#endif
1321
1322 req->result = -1;
1323
1324 if (!(flags & EIO_READDIR_DENTS))
1325 flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
1326
1327#ifdef _WIN32
1328 {
1329 int len = strlen ((const char *)req->ptr1);
1330 char *path = malloc (MAX_PATH);
1331 const char *fmt;
1332 const char *reqpath = wd_expand (&self->tmpbuf, req->wd, req->ptr1);
1333
1334 if (!len)
1335 fmt = "./*";
1336 else if (reqpath[len - 1] == '/' || reqpath[len - 1] == '\\')
1337 fmt = "%s*";
1338 else
1339 fmt = "%s/*";
1340
1341 _snprintf (path, MAX_PATH, fmt, reqpath);
1342 dirp = FindFirstFile (path, &entp);
1343 free (path);
1344
1345 if (dirp == INVALID_HANDLE_VALUE)
1346 {
1347 /* should steal _dosmaperr */
1348 switch (GetLastError ())
1349 {
1350 case ERROR_FILE_NOT_FOUND:
1351 req->result = 0;
1352 break;
1353
1354 case ERROR_INVALID_NAME:
1355 case ERROR_PATH_NOT_FOUND:
1356 case ERROR_NO_MORE_FILES:
1357 errno = ENOENT;
1358 break;
1359
1360 case ERROR_NOT_ENOUGH_MEMORY:
1361 errno = ENOMEM;
1362 break;
1363
1364 default:
1365 errno = EINVAL;
1366 break;
1367 }
1368
1369 return;
1370 }
1371 }
1372#else
1373 #if HAVE_AT
1374 if (req->wd)
1375 {
1376 int fd = openat (WD2FD (req->wd), req->ptr1, O_CLOEXEC | O_SEARCH | O_DIRECTORY);
1377
1126 if (len < 0) 1378 if (fd < 0)
1127 croak ("length must not be negative"); 1379 return;
1128 1380
1381 dirp = fdopendir (fd);
1382
1383 if (!dirp)
1384 close (fd);
1385 }
1386 else
1387 dirp = opendir (req->ptr1);
1388 #else
1389 dirp = opendir (wd_expand (&self->tmpbuf, req->wd, req->ptr1));
1390 #endif
1391
1392 if (!dirp)
1393 return;
1394#endif
1395
1396 if (req->flags & EIO_FLAG_PTR1_FREE)
1397 free (req->ptr1);
1398
1399 req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
1400 req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
1401 req->ptr2 = names = malloc (namesalloc);
1402
1403 if (!names || (flags && !dents))
1404 return;
1405
1406 for (;;)
1407 {
1408 int done;
1409
1410#ifdef _WIN32
1411 done = !dirp;
1412#else
1413 errno = 0;
1414 entp = readdir (dirp);
1415 done = !entp;
1416#endif
1417
1418 if (done)
1129 { 1419 {
1130 dREQ; 1420#ifndef _WIN32
1421 int old_errno = errno;
1422 closedir (dirp);
1423 errno = old_errno;
1131 1424
1132 req->type = ix; 1425 if (errno)
1133 req->sv1 = newSVsv (fh); 1426 break;
1134 req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh)) 1427#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 1428
1142 if (!SvREADONLY (data)) 1429 /* sort etc. */
1430 req->int1 = flags;
1431 req->result = dentoffs;
1432
1433 if (flags & EIO_READDIR_STAT_ORDER)
1434 eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits);
1435 else if (flags & EIO_READDIR_DIRS_FIRST)
1436 if (flags & EIO_READDIR_FOUND_UNKNOWN)
1437 eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */
1438 else
1439 {
1440 /* in this case, all is known, and we just put dirs first and sort them */
1441 eio_dirent *oth = dents + dentoffs;
1442 eio_dirent *dir = dents;
1443
1444 /* now partition dirs to the front, and non-dirs to the back */
1445 /* by walking from both sides and swapping if necessary */
1446 while (oth > dir)
1447 {
1448 if (dir->type == EIO_DT_DIR)
1449 ++dir;
1450 else if ((--oth)->type == EIO_DT_DIR)
1451 {
1452 eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
1453
1454 ++dir;
1455 }
1456 }
1457
1458 /* now sort the dirs only (dirs all have the same score) */
1459 eio_dent_sort (dents, dir - dents, 0, inode_bits);
1460 }
1461
1462 break;
1463 }
1464
1465 /* now add the entry to our list(s) */
1466 name = D_NAME (entp);
1467
1468 /* skip . and .. entries */
1469 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1470 {
1471 int len = D_NAMLEN (entp) + 1;
1472
1473 while (ecb_expect_false (namesoffs + len > namesalloc))
1143 { 1474 {
1144 SvREADONLY_on (data); 1475 namesalloc *= 2;
1145 req->flags |= FLAG_SV2_RO_OFF; 1476 req->ptr2 = names = realloc (names, namesalloc);
1477
1478 if (!names)
1479 break;
1146 } 1480 }
1147 1481
1148 EIO_SEND; 1482 memcpy (names + namesoffs, name, len);
1483
1484 if (dents)
1485 {
1486 struct eio_dirent *ent;
1487
1488 if (ecb_expect_false (dentoffs == dentalloc))
1489 {
1490 dentalloc *= 2;
1491 req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
1492
1493 if (!dents)
1494 break;
1495 }
1496
1497 ent = dents + dentoffs;
1498
1499 ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
1500 ent->namelen = len - 1;
1501 ent->inode = D_INO (entp);
1502
1503 inode_bits |= ent->inode;
1504
1505 switch (D_TYPE (entp))
1506 {
1507 default:
1508 ent->type = EIO_DT_UNKNOWN;
1509 flags |= EIO_READDIR_FOUND_UNKNOWN;
1510 break;
1511
1512 #ifdef DT_FIFO
1513 case DT_FIFO: ent->type = EIO_DT_FIFO; break;
1514 #endif
1515 #ifdef DT_CHR
1516 case DT_CHR: ent->type = EIO_DT_CHR; break;
1517 #endif
1518 #ifdef DT_MPC
1519 case DT_MPC: ent->type = EIO_DT_MPC; break;
1520 #endif
1521 #ifdef DT_DIR
1522 case DT_DIR: ent->type = EIO_DT_DIR; break;
1523 #endif
1524 #ifdef DT_NAM
1525 case DT_NAM: ent->type = EIO_DT_NAM; break;
1526 #endif
1527 #ifdef DT_BLK
1528 case DT_BLK: ent->type = EIO_DT_BLK; break;
1529 #endif
1530 #ifdef DT_MPB
1531 case DT_MPB: ent->type = EIO_DT_MPB; break;
1532 #endif
1533 #ifdef DT_REG
1534 case DT_REG: ent->type = EIO_DT_REG; break;
1535 #endif
1536 #ifdef DT_NWK
1537 case DT_NWK: ent->type = EIO_DT_NWK; break;
1538 #endif
1539 #ifdef DT_CMP
1540 case DT_CMP: ent->type = EIO_DT_CMP; break;
1541 #endif
1542 #ifdef DT_LNK
1543 case DT_LNK: ent->type = EIO_DT_LNK; break;
1544 #endif
1545 #ifdef DT_SOCK
1546 case DT_SOCK: ent->type = EIO_DT_SOCK; break;
1547 #endif
1548 #ifdef DT_DOOR
1549 case DT_DOOR: ent->type = EIO_DT_DOOR; break;
1550 #endif
1551 #ifdef DT_WHT
1552 case DT_WHT: ent->type = EIO_DT_WHT; break;
1553 #endif
1554 }
1555
1556 ent->score = 7;
1557
1558 if (flags & EIO_READDIR_DIRS_FIRST)
1559 {
1560 if (ent->type == EIO_DT_UNKNOWN)
1561 {
1562 if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
1563 ent->score = 1;
1564 else if (!strchr (name, '.')) /* absence of dots indicate likely dirs */
1565 ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
1566 }
1567 else if (ent->type == EIO_DT_DIR)
1568 ent->score = 0;
1569 }
1570 }
1571
1572 namesoffs += len;
1573 ++dentoffs;
1149 } 1574 }
1575
1576 if (EIO_CANCELLED (req))
1577 {
1578 errno = ECANCELED;
1579 break;
1580 }
1581
1582#ifdef _WIN32
1583 if (!FindNextFile (dirp, &entp))
1584 {
1585 FindClose (dirp);
1586 dirp = 0;
1587 }
1588#endif
1589 }
1590}
1591
1592/*****************************************************************************/
1593/* working directory stuff */
1594/* various deficiencies in the posix 2008 api force us to */
1595/* keep the absolute path in string form at all times */
1596/* fuck yeah. */
1597
1598#if !HAVE_AT
1599
1600/* a bit like realpath, but usually faster because it doesn'T have to return */
1601/* an absolute or canonical path */
1602static const char *
1603wd_expand (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path)
1604{
1605 if (!wd || *path == '/')
1606 return path;
1607
1608 if (path [0] == '.' && !path [1])
1609 return wd->str;
1610
1611 {
1612 int l1 = wd->len;
1613 int l2 = strlen (path);
1614
1615 char *res = etp_tmpbuf_get (tmpbuf, l1 + l2 + 2);
1616
1617 memcpy (res, wd->str, l1);
1618 res [l1] = '/';
1619 memcpy (res + l1 + 1, path, l2 + 1);
1620
1621 return res;
1622 }
1623}
1624
1625#endif
1626
1627static eio_wd
1628eio__wd_open_sync (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path)
1629{
1630 int fd;
1631 eio_wd res;
1632 int len = eio__realpath (tmpbuf, wd, path);
1633
1634 if (len < 0)
1635 return EIO_INVALID_WD;
1636
1637#if HAVE_AT
1638 fd = openat (WD2FD (wd), path, O_CLOEXEC | O_SEARCH | O_DIRECTORY);
1639
1640 if (fd < 0)
1641 return EIO_INVALID_WD;
1642#endif
1643
1644 res = malloc (sizeof (*res) + len); /* one extra 0-byte */
1645
1646#if HAVE_AT
1647 res->fd = fd;
1648#endif
1649
1650 res->len = len;
1651 memcpy (res->str, tmpbuf->ptr, len);
1652 res->str [len] = 0;
1653
1654 return res;
1655}
1656
1657eio_wd
1658eio_wd_open_sync (eio_wd wd, const char *path)
1659{
1660 struct etp_tmpbuf tmpbuf = { };
1661 wd = eio__wd_open_sync (&tmpbuf, wd, path);
1662 free (tmpbuf.ptr);
1663
1664 return wd;
1150} 1665}
1151 1666
1152void 1667void
1153aio_readlink (SV8 *path, SV *callback=&PL_sv_undef) 1668eio_wd_close_sync (eio_wd wd)
1154 PROTOTYPE: $$;$
1155 PPCODE:
1156{ 1669{
1157 SV *data; 1670 if (wd != EIO_INVALID_WD && wd != EIO_CWD)
1158 dREQ; 1671 {
1159 1672 #if HAVE_AT
1160 data = newSV (NAME_MAX); 1673 close (wd->fd);
1161 SvPOK_on (data); 1674 #endif
1162 1675 free (wd);
1163 req->type = EIO_READLINK; 1676 }
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} 1677}
1678
1679#if HAVE_AT
1680
1681/* they forgot these */
1682
1683static int
1684eio__truncateat (int dirfd, const char *path, off_t length)
1685{
1686 int fd = openat (dirfd, path, O_WRONLY | O_CLOEXEC);
1687 int res;
1688
1689 if (fd < 0)
1690 return fd;
1691
1692 res = ftruncate (fd, length);
1693 close (fd);
1694 return res;
1695}
1696
1697static int
1698eio__statvfsat (int dirfd, const char *path, struct statvfs *buf)
1699{
1700 int fd = openat (dirfd, path, O_SEARCH | O_CLOEXEC);
1701 int res;
1702
1703 if (fd < 0)
1704 return fd;
1705
1706 res = fstatvfs (fd, buf);
1707 close (fd);
1708 return res;
1709
1710}
1711
1712#endif
1713
1714/*****************************************************************************/
1715
1716#define ALLOC(len) \
1717 if (!req->ptr2) \
1718 { \
1719 X_LOCK (EIO_POOL->wrklock); \
1720 req->flags |= EIO_FLAG_PTR2_FREE; \
1721 X_UNLOCK (EIO_POOL->wrklock); \
1722 req->ptr2 = malloc (len); \
1723 if (!req->ptr2) \
1724 { \
1725 errno = ENOMEM; \
1726 req->result = -1; \
1727 break; \
1728 } \
1729 }
1730
1731/*****************************************************************************/
1732
1733int ecb_cold
1734eio_init (void (*want_poll)(void), void (*done_poll)(void))
1735{
1736 eio_want_poll_cb = want_poll;
1737 eio_done_poll_cb = done_poll;
1738
1739 return etp_init (EIO_POOL, 0, 0, 0);
1740}
1741
1742ecb_inline void
1743eio_api_destroy (eio_req *req)
1744{
1745 free (req);
1746}
1747
1748#define REQ(rtype) \
1749 eio_req *req; \
1750 \
1751 req = (eio_req *)calloc (1, sizeof *req); \
1752 if (!req) \
1753 return 0; \
1754 \
1755 req->type = rtype; \
1756 req->pri = pri; \
1757 req->finish = cb; \
1758 req->data = data; \
1759 req->destroy = eio_api_destroy;
1760
1761#define SEND eio_submit (req); return req
1762
1763#define PATH \
1764 req->flags |= EIO_FLAG_PTR1_FREE; \
1765 req->ptr1 = strdup (path); \
1766 if (!req->ptr1) \
1767 { \
1768 eio_api_destroy (req); \
1769 return 0; \
1770 }
1771
1772#define SINGLEDOT(ptr) (0[(char *)(ptr)] == '.' && !1[(char *)(ptr)])
1773
1774static void
1775eio_execute (etp_worker *self, eio_req *req)
1776{
1777#if HAVE_AT
1778 int dirfd;
1779#else
1780 const char *path;
1781#endif
1782
1783 if (ecb_expect_false (EIO_CANCELLED (req)))
1784 {
1785 req->result = -1;
1786 req->errorno = ECANCELED;
1787 return;
1788 }
1789
1790 if (ecb_expect_false (req->wd == EIO_INVALID_WD))
1791 {
1792 req->result = -1;
1793 req->errorno = ENOENT;
1794 return;
1795 }
1796
1797 if (req->type >= EIO_OPEN)
1798 {
1799 #if HAVE_AT
1800 dirfd = WD2FD (req->wd);
1801 #else
1802 path = wd_expand (&self->tmpbuf, req->wd, req->ptr1);
1803 #endif
1804 }
1805
1806 switch (req->type)
1807 {
1808 case EIO_WD_OPEN: req->wd = eio__wd_open_sync (&self->tmpbuf, req->wd, req->ptr1);
1809 req->result = req->wd == EIO_INVALID_WD ? -1 : 0;
1810 break;
1811 case EIO_WD_CLOSE: req->result = 0;
1812 eio_wd_close_sync (req->wd); break;
1813
1814 case EIO_SEEK: eio__lseek (req); break;
1815 case EIO_READ: ALLOC (req->size);
1816 req->result = req->offs >= 0
1817 ? pread (req->int1, req->ptr2, req->size, req->offs)
1818 : read (req->int1, req->ptr2, req->size); break;
1819 case EIO_WRITE: req->result = req->offs >= 0
1820 ? pwrite (req->int1, req->ptr2, req->size, req->offs)
1821 : write (req->int1, req->ptr2, req->size); break;
1822
1823 case EIO_FCNTL: req->result = fcntl (req->int1, (int) req->int2, req->ptr2); break;
1824 case EIO_IOCTL: req->result = ioctl (req->int1, (unsigned long)req->int2, req->ptr2); break;
1825
1826 case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1827 case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size); break;
1828
1829#if HAVE_AT
1830
1831 case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1832 req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, 0); break;
1833 case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1834 req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, AT_SYMLINK_NOFOLLOW); break;
1835 case EIO_CHOWN: req->result = fchownat (dirfd, req->ptr1, req->int2, req->int3, 0); break;
1836 case EIO_CHMOD: req->result = fchmodat (dirfd, req->ptr1, (mode_t)req->int2, 0); break;
1837 case EIO_TRUNCATE: req->result = eio__truncateat (dirfd, req->ptr1, req->offs); break;
1838 case EIO_OPEN: req->result = openat (dirfd, req->ptr1, req->int1, (mode_t)req->int2); break;
1839
1840 case EIO_UNLINK: req->result = unlinkat (dirfd, req->ptr1, 0); break;
1841 case EIO_RMDIR: /* complications arise because "." cannot be removed, so we might have to expand */
1842 req->result = req->wd && SINGLEDOT (req->ptr1)
1843 ? rmdir (req->wd->str)
1844 : unlinkat (dirfd, req->ptr1, AT_REMOVEDIR); break;
1845 case EIO_MKDIR: req->result = mkdirat (dirfd, req->ptr1, (mode_t)req->int2); break;
1846 case EIO_RENAME: /* complications arise because "." cannot be renamed, so we might have to expand */
1847 req->result = req->wd && SINGLEDOT (req->ptr1)
1848 ? rename (req->wd->str, req->ptr2)
1849 : renameat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2); break;
1850 case EIO_LINK: req->result = linkat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2, 0); break;
1851 case EIO_SYMLINK: req->result = symlinkat (req->ptr1, dirfd, req->ptr2); break;
1852 case EIO_MKNOD: req->result = mknodat (dirfd, req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
1853 case EIO_READLINK: ALLOC (PATH_MAX);
1854 req->result = readlinkat (dirfd, req->ptr1, req->ptr2, PATH_MAX); break;
1855 case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
1856 req->result = eio__statvfsat (dirfd, req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
1857 case EIO_UTIME:
1858 case EIO_FUTIME:
1859 {
1860 struct timespec ts[2];
1861 struct timespec *times;
1862
1863 if (req->nv1 != -1. || req->nv2 != -1.)
1864 {
1865 ts[0].tv_sec = req->nv1;
1866 ts[0].tv_nsec = (req->nv1 - ts[0].tv_sec) * 1e9;
1867 ts[1].tv_sec = req->nv2;
1868 ts[1].tv_nsec = (req->nv2 - ts[1].tv_sec) * 1e9;
1869
1870 times = ts;
1871 }
1872 else
1873 times = 0;
1874
1875 req->result = req->type == EIO_FUTIME
1876 ? futimens (req->int1, times)
1877 : utimensat (dirfd, req->ptr1, times, 0);
1878 }
1879 break;
1880
1881#else
1882
1883 case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1884 req->result = stat (path , (EIO_STRUCT_STAT *)req->ptr2); break;
1885 case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1886 req->result = lstat (path , (EIO_STRUCT_STAT *)req->ptr2); break;
1887 case EIO_CHOWN: req->result = chown (path , req->int2, req->int3); break;
1888 case EIO_CHMOD: req->result = chmod (path , (mode_t)req->int2); break;
1889 case EIO_TRUNCATE: req->result = truncate (path , req->offs); break;
1890 case EIO_OPEN: req->result = open (path , req->int1, (mode_t)req->int2); break;
1891
1892 case EIO_UNLINK: req->result = unlink (path ); break;
1893 case EIO_RMDIR: req->result = rmdir (path ); break;
1894 case EIO_MKDIR: req->result = mkdir (path , (mode_t)req->int2); break;
1895 case EIO_RENAME: req->result = rename (path , req->ptr2); break;
1896 case EIO_LINK: req->result = link (path , req->ptr2); break;
1897 case EIO_SYMLINK: req->result = symlink (path , req->ptr2); break;
1898 case EIO_MKNOD: req->result = mknod (path , (mode_t)req->int2, (dev_t)req->offs); break;
1899 case EIO_READLINK: ALLOC (PATH_MAX);
1900 req->result = readlink (path, req->ptr2, PATH_MAX); break;
1901 case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
1902 req->result = statvfs (path , (EIO_STRUCT_STATVFS *)req->ptr2); break;
1903
1904 case EIO_UTIME:
1905 case EIO_FUTIME:
1906 {
1907 struct timeval tv[2];
1908 struct timeval *times;
1909
1910 if (req->nv1 != -1. || req->nv2 != -1.)
1911 {
1912 tv[0].tv_sec = req->nv1;
1913 tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1e6;
1914 tv[1].tv_sec = req->nv2;
1915 tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1e6;
1916
1917 times = tv;
1918 }
1919 else
1920 times = 0;
1921
1922 req->result = req->type == EIO_FUTIME
1923 ? futimes (req->int1, times)
1924 : utimes (req->ptr1, times);
1925 }
1926 break;
1927
1928#endif
1929
1930 case EIO_REALPATH: if (0 <= (req->result = eio__realpath (&self->tmpbuf, req->wd, req->ptr1)))
1931 {
1932 ALLOC (req->result);
1933 memcpy (req->ptr2, self->tmpbuf.ptr, req->result);
1934 }
1935 break;
1936
1937 case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1938 req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
1939
1940 case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
1941 req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
1942
1943 case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
1944 case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
1945 case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
1946
1947 case EIO_CLOSE: req->result = close (req->int1); break;
1948 case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
1949 case EIO_SYNC: req->result = 0; sync (); break;
1950 case EIO_FSYNC: req->result = fsync (req->int1); break;
1951 case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
1952 case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break;
1953 case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
1954 case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
1955 case EIO_MTOUCH: req->result = eio__mtouch (req); break;
1956 case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
1957 case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
1958 case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;
1959
1960 case EIO_READDIR: eio__scandir (req, self); break;
1961
1962 case EIO_BUSY:
1963#ifdef _WIN32
1964 Sleep (req->nv1 * 1e3);
1965#else
1966 {
1967 struct timeval tv;
1968
1969 tv.tv_sec = req->nv1;
1970 tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6;
1971
1972 req->result = select (0, 0, 0, 0, &tv);
1973 }
1974#endif
1975 break;
1976
1977#if 0
1978 case EIO_GROUP:
1979 abort (); /* handled in eio_request */
1980#endif
1981
1982 case EIO_NOP:
1983 req->result = 0;
1984 break;
1985
1986 case EIO_CUSTOM:
1987 req->feed (req);
1988 break;
1989
1990 default:
1991 req->result = EIO_ENOSYS ();
1992 break;
1993 }
1994
1995 req->errorno = errno;
1996}
1997
1998#ifndef EIO_NO_WRAPPERS
1999
2000eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data)
2001{
2002 REQ (EIO_WD_OPEN); PATH; SEND;
2003}
2004
2005eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data)
2006{
2007 REQ (EIO_WD_CLOSE); req->wd = wd; SEND;
2008}
2009
2010eio_req *eio_nop (int pri, eio_cb cb, void *data)
2011{
2012 REQ (EIO_NOP); SEND;
2013}
2014
2015eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
2016{
2017 REQ (EIO_BUSY); req->nv1 = delay; SEND;
2018}
2019
2020eio_req *eio_sync (int pri, eio_cb cb, void *data)
2021{
2022 REQ (EIO_SYNC); SEND;
2023}
2024
2025eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
2026{
2027 REQ (EIO_FSYNC); req->int1 = fd; SEND;
2028}
2029
2030eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
2031{
2032 REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
2033}
2034
2035eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
2036{
2037 REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
2038}
2039
2040eio_req *eio_syncfs (int fd, int pri, eio_cb cb, void *data)
2041{
2042 REQ (EIO_SYNCFS); req->int1 = fd; SEND;
2043}
2044
2045eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
2046{
2047 REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
2048}
2049
2050eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
2051{
2052 REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
2053}
2054
2055eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data)
2056{
2057 REQ (EIO_MLOCK); req->ptr2 = addr; req->size = length; SEND;
2058}
2059
2060eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)
2061{
2062 REQ (EIO_MLOCKALL); req->int1 = flags; SEND;
2063}
2064
2065eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)
2066{
2067 REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;
2068}
2069
2070eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
2071{
2072 REQ (EIO_CLOSE); req->int1 = fd; SEND;
2073}
2074
2075eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
2076{
2077 REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
2078}
2079
2080eio_req *eio_seek (int fd, off_t offset, int whence, int pri, eio_cb cb, void *data)
2081{
2082 REQ (EIO_SEEK); req->int1 = fd; req->offs = offset; req->int2 = whence; SEND;
2083}
2084
2085eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
2086{
2087 REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
2088}
2089
2090eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
2091{
2092 REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
2093}
2094
2095eio_req *eio_fcntl (int fd, int cmd, void *arg, int pri, eio_cb cb, void *data)
2096{
2097 REQ (EIO_IOCTL); req->int1 = fd; req->int2 = cmd; req->ptr2 = arg; SEND;
2098}
2099
2100eio_req *eio_ioctl (int fd, unsigned long request, void *buf, int pri, eio_cb cb, void *data)
2101{
2102 REQ (EIO_IOCTL); req->int1 = fd; req->int2 = request; req->ptr2 = buf; SEND;
2103}
2104
2105eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
2106{
2107 REQ (EIO_FSTAT); req->int1 = fd; SEND;
2108}
2109
2110eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data)
2111{
2112 REQ (EIO_FSTATVFS); req->int1 = fd; SEND;
2113}
2114
2115eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
2116{
2117 REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
2118}
2119
2120eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
2121{
2122 REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
2123}
2124
2125eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
2126{
2127 REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
2128}
2129
2130eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
2131{
2132 REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
2133}
2134
2135eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
2136{
2137 REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
2138}
2139
2140eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data)
2141{
2142 REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
2143}
2144
2145eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
2146{
2147 REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
2148}
2149
2150eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
2151{
2152 REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
2153}
2154
2155eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
2156{
2157 REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
2158}
2159
2160eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
2161{
2162 REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
2163}
2164
2165eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
2166{
2167 REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
2168}
2169
2170eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
2171{
2172 REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
2173}
2174
2175static eio_req *
2176eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
2177{
2178 REQ (type); PATH; SEND;
2179}
2180
2181eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
2182{
2183 return eio__1path (EIO_READLINK, path, pri, cb, data);
2184}
2185
2186eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data)
2187{
2188 return eio__1path (EIO_REALPATH, path, pri, cb, data);
2189}
2190
2191eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
2192{
2193 return eio__1path (EIO_STAT, path, pri, cb, data);
2194}
2195
2196eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
2197{
2198 return eio__1path (EIO_LSTAT, path, pri, cb, data);
2199}
2200
2201eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data)
2202{
2203 return eio__1path (EIO_STATVFS, path, pri, cb, data);
2204}
2205
2206eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
2207{
2208 return eio__1path (EIO_UNLINK, path, pri, cb, data);
2209}
2210
2211eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
2212{
2213 return eio__1path (EIO_RMDIR, path, pri, cb, data);
2214}
2215
2216eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data)
2217{
2218 REQ (EIO_READDIR); PATH; req->int1 = flags; SEND;
2219}
2220
2221eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
2222{
2223 REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND;
2224}
2225
2226static eio_req *
2227eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
2228{
2229 REQ (type); PATH;
2230
2231 req->flags |= EIO_FLAG_PTR2_FREE;
2232 req->ptr2 = strdup (new_path);
2233 if (!req->ptr2)
2234 {
2235 eio_api_destroy (req);
2236 return 0;
2237 }
2238
2239 SEND;
2240}
2241
2242eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
2243{
2244 return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
2245}
2246
2247eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
2248{
2249 return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
2250}
2251
2252eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
2253{
2254 return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
2255}
2256
2257eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data)
2258{
2259 REQ (EIO_CUSTOM); req->feed = execute; SEND;
2260}
2261
2262#endif
2263
2264eio_req *eio_grp (eio_cb cb, void *data)
2265{
2266 const int pri = EIO_PRI_MAX;
2267
2268 REQ (EIO_GROUP); SEND;
2269}
2270
2271#undef REQ
2272#undef PATH
2273#undef SEND
2274
2275/*****************************************************************************/
2276/* grp functions */
1171 2277
1172void 2278void
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) 2279eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1420{ 2280{
1421 grp->int2 = limit; 2281 grp->int2 = limit;
1422 grp->feed = feed; 2282 grp->feed = feed;
1423 2283
1424 grp_try_feed (grp); 2284 grp_try_feed (grp);
1425} 2285}
1426 2286
2287void
1427void eio_grp_limit (eio_req *grp, int limit) 2288eio_grp_limit (eio_req *grp, int limit)
1428{ 2289{
1429 grp->int2 = limit; 2290 grp->int2 = limit;
1430 2291
1431 grp_try_feed (grp); 2292 grp_try_feed (grp);
1432} 2293}
1433 2294
2295void
1434void eio_grp_add (eio_req *grp, eio_req *req) 2296eio_grp_add (eio_req *grp, eio_req *req)
1435{ 2297{
1436 assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2)); 2298 assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
2299
2300 grp->flags |= ETP_FLAG_GROUPADD;
1437 2301
1438 ++grp->size; 2302 ++grp->size;
1439 req->grp = grp; 2303 req->grp = grp;
1440 2304
1441 req->grp_prev = 0; 2305 req->grp_prev = 0;
… …
1445 grp->grp_first->grp_prev = req; 2309 grp->grp_first->grp_prev = req;
1446 2310
1447 grp->grp_first = req; 2311 grp->grp_first = req;
1448} 2312}
1449 2313
2314/*****************************************************************************/
2315/* misc garbage */
1450 2316
2317eio_ssize_t
2318eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
2319{
2320 return eio__sendfile (ofd, ifd, offset, count);
2321}
2322

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