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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 1.148 by root, Tue Feb 20 06:05:19 2018 UTC

1/*
2 * libeio implementation
3 *
4 * Copyright (c) 2007,2008,2009,2010,2011,2012,2013,2016,2017 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"
2#include "xthread.h" 45#include "ecb.h"
3 46
4#include <errno.h> 47#include <errno.h>
5
6#include "EXTERN.h"
7#include "perl.h"
8#include "XSUB.h"
9
10#include <stddef.h> 48#include <stddef.h>
11#include <stdlib.h> 49#include <stdlib.h>
50#include <string.h>
12#include <errno.h> 51#include <errno.h>
13#include <sys/types.h> 52#include <sys/types.h>
14#include <sys/stat.h> 53#include <sys/stat.h>
15#include <limits.h> 54#include <limits.h>
16#include <fcntl.h> 55#include <fcntl.h>
17#include <sched.h> 56#include <assert.h>
57
58/* intptr_t comes from unistd.h, says POSIX/UNIX/tradition */
59/* intptr_t only comes from stdint.h, says idiot openbsd coder */
60#if HAVE_STDINT_H
61# include <stdint.h>
62#endif
63
64#ifndef ECANCELED
65# define ECANCELED EDOM
66#endif
67#ifndef ELOOP
68# define ELOOP EDOM
69#endif
70
71#if !defined(ENOTSOCK) && defined(WSAENOTSOCK)
72# define ENOTSOCK WSAENOTSOCK
73#endif
74
75static void eio_destroy (eio_req *req);
18 76
19#ifndef EIO_FINISH 77#ifndef EIO_FINISH
20# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0 78# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
21#endif 79#endif
22 80
… …
26 84
27#ifndef EIO_FEED 85#ifndef EIO_FEED
28# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0) 86# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)
29#endif 87#endif
30 88
89#ifndef EIO_FD_TO_WIN32_HANDLE
90# define EIO_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
91#endif
92#ifndef EIO_WIN32_HANDLE_TO_FD
93# define EIO_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
94#endif
95
96#define EIO_ERRNO(errval,retval) ((errno = errval), retval)
97
98#define EIO_ENOSYS() EIO_ERRNO (ENOSYS, -1)
99
31#ifdef _WIN32 100#ifdef _WIN32
32 101
33 /*doh*/ 102 #undef PAGESIZE
103 #define PAGESIZE 4096 /* GetSystemInfo? */
104
105 #define O_CLOEXEC 0
106
107 /* TODO: look at how perl does stat (non-sloppy), unlink (ro-files), utime, link */
108
109 #ifdef EIO_STRUCT_STATI64
110 /* look at perl's non-sloppy stat */
111 #define stat(path,buf) _stati64 (path,buf)
112 #define fstat(fd,buf) _fstati64 (fd,buf)
113 #endif
114 #define lstat(path,buf) stat (path,buf)
115 #define fsync(fd) (FlushFileBuffers ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1))
116 #define mkdir(path,mode) _mkdir (path)
117 #define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))
118
119 #define chmod(path,mode) _chmod (path, mode)
120 #define dup(fd) _dup (fd)
121 #define dup2(fd1,fd2) _dup2 (fd1, fd2)
122 #define pipe(fds) _pipe (fds, 4096, O_BINARY)
123
124 #define fcntl(fd,cmd,arg) EIO_ENOSYS ()
125 #define ioctl(fd,cmd,arg) EIO_ENOSYS ()
126 #define fchmod(fd,mode) EIO_ENOSYS ()
127 #define chown(path,uid,gid) EIO_ENOSYS ()
128 #define fchown(fd,uid,gid) EIO_ENOSYS ()
129 #define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
130 #define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */
131 #define mknod(path,mode,dev) EIO_ENOSYS ()
132 #define sync() EIO_ENOSYS ()
133 #define readlink(path,buf,s) EIO_ENOSYS ()
134 #define statvfs(path,buf) EIO_ENOSYS ()
135 #define fstatvfs(fd,buf) EIO_ENOSYS ()
136
137 #define pread(fd,buf,count,offset) eio__pread (fd, buf, count, offset)
138 #define pwrite(fd,buf,count,offset) eio__pwrite (fd, buf, count, offset)
139
140 #if __GNUC__
141 typedef long long eio_off_t; /* signed for compatibility to msvc */
142 #else
143 typedef __int64 eio_off_t; /* unsigned not supported by msvc */
144 #endif
145
146 static eio_ssize_t
147 eio__pread (int fd, void *buf, eio_ssize_t count, eio_off_t offset)
148 {
149 OVERLAPPED o = { 0 };
150 DWORD got;
151
152 o.Offset = offset;
153 o.OffsetHigh = offset >> 32;
154
155 return ReadFile ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd), buf, count, &got, &o)
156 ? got : -1;
157 }
158
159 static eio_ssize_t
160 eio__pwrite (int fd, void *buf, eio_ssize_t count, eio_off_t offset)
161 {
162 OVERLAPPED o = { 0 };
163 DWORD got;
164
165 o.Offset = offset;
166 o.OffsetHigh = offset >> 32;
167
168 return WriteFile ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd), buf, count, &got, &o)
169 ? got : -1;
170 }
171
172 /* rename() uses MoveFile, which fails to overwrite */
173 #define rename(old,neu) eio__rename (old, neu)
174
175 static int
176 eio__rename (const char *old, const char *neu)
177 {
178 if (MoveFileEx (old, neu, MOVEFILE_REPLACE_EXISTING))
179 return 0;
180
181 /* should steal _dosmaperr */
182 switch (GetLastError ())
183 {
184 case ERROR_FILE_NOT_FOUND:
185 case ERROR_PATH_NOT_FOUND:
186 case ERROR_INVALID_DRIVE:
187 case ERROR_NO_MORE_FILES:
188 case ERROR_BAD_NETPATH:
189 case ERROR_BAD_NET_NAME:
190 case ERROR_BAD_PATHNAME:
191 case ERROR_FILENAME_EXCED_RANGE:
192 errno = ENOENT;
193 break;
194
195 default:
196 errno = EACCES;
197 break;
198 }
199
200 return -1;
201 }
202
203 /* we could even stat and see if it exists */
204 static int
205 symlink (const char *old, const char *neu)
206 {
207 #if WINVER >= 0x0600
208 int flags;
209
210 /* This tries out all combinations of SYMBOLIC_LINK_FLAG_DIRECTORY
211 * and SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE,
212 * with directory first.
213 */
214 for (flags = 3; flags >= 0; --flags)
215 if (CreateSymbolicLink (neu, old, flags))
216 return 0;
217 #endif
218
219 return EIO_ERRNO (ENOENT, -1);
220 }
221
222 /* POSIX API only, causing trouble for win32 apps */
223 #define CreateHardLink(neu,old,flags) 0 /* not really creating hardlink, still using relative paths? */
224 #define CreateSymbolicLink(neu,old,flags) 0 /* vista+ only */
225
226 struct statvfs
227 {
228 int dummy;
229 };
230
231 #define DT_DIR EIO_DT_DIR
232 #define DT_REG EIO_DT_REG
233 #define D_NAME(entp) entp.cFileName
234 #define D_TYPE(entp) (entp.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ? DT_DIR : DT_REG)
34 235
35#else 236#else
36 237
37# include "config.h" 238 #include <sys/ioctl.h>
38# include <sys/time.h> 239 #include <sys/time.h>
39# include <sys/select.h> 240 #include <sys/select.h>
40# include <unistd.h> 241 #include <unistd.h>
242 #include <signal.h>
243 #include <dirent.h>
244
245 #ifdef ANDROID
246 #include <sys/vfs.h>
247 #define statvfs statfs
248 #define fstatvfs fstatfs
249 #include <asm/page.h> /* supposedly limits.h does #define PAGESIZE PAGESIZE */
250 #else
251 #include <sys/statvfs.h>
252 #endif
253
254 #if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
255 #include <sys/mman.h>
256 #endif
257
258 #define D_NAME(entp) entp->d_name
259
260 /* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
261 #if __FreeBSD__ || __NetBSD__ || __OpenBSD__
262 #define _DIRENT_HAVE_D_TYPE /* sigh */
263 #define D_INO(de) (de)->d_fileno
264 #define D_NAMLEN(de) (de)->d_namlen
265 #elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
266 #define D_INO(de) (de)->d_ino
267 #endif
268
269 #ifdef _D_EXACT_NAMLEN
270 #undef D_NAMLEN
271 #define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
272 #endif
273
274 #ifdef _DIRENT_HAVE_D_TYPE
275 #define D_TYPE(de) (de)->d_type
276 #endif
277
278 #ifndef EIO_STRUCT_DIRENT
279 #define EIO_STRUCT_DIRENT struct dirent
280 #endif
281
282#endif
283
284#if HAVE_UTIMES
41# include <utime.h> 285# include <utime.h>
42# include <signal.h>
43
44# ifndef EIO_STRUCT_DIRENT
45# define EIO_STRUCT_DIRENT struct dirent
46# endif 286#endif
47 287
48#endif 288#if HAVE_SYS_SYSCALL_H
49 289# include <sys/syscall.h>
50# ifndef EIO_STRUCT_STAT
51# define EIO_STRUCT_STAT struct stat
52# endif 290#endif
53 291
54#if HAVE_SENDFILE 292#if HAVE_SENDFILE
55# if __linux 293# if __linux
56# include <sys/sendfile.h> 294# include <sys/sendfile.h>
57# elif __freebsd 295# elif __FreeBSD__ || defined __APPLE__
58# include <sys/socket.h> 296# include <sys/socket.h>
59# include <sys/uio.h> 297# include <sys/uio.h>
60# elif __hpux 298# elif __hpux
61# include <sys/socket.h> 299# include <sys/socket.h>
62# elif __solaris /* not yet */ 300# elif __solaris
63# include <sys/sendfile.h> 301# include <sys/sendfile.h>
64# else 302# else
65# error sendfile support requested but not available 303# error sendfile support requested but not available
66# endif 304# endif
67#endif 305#endif
68 306
69/* number of seconds after which an idle threads exit */ 307#if HAVE_RENAMEAT2
70#define IDLE_TIMEOUT 10 308# include <sys/syscall.h>
309# include <linux/fs.h>
310#endif
311
312#ifndef D_TYPE
313# define D_TYPE(de) 0
314#endif
315#ifndef D_INO
316# define D_INO(de) 0
317#endif
318#ifndef D_NAMLEN
319# define D_NAMLEN(entp) strlen (D_NAME (entp))
320#endif
71 321
72/* used for struct dirent, AIX doesn't provide it */ 322/* used for struct dirent, AIX doesn't provide it */
73#ifndef NAME_MAX 323#ifndef NAME_MAX
74# define NAME_MAX 4096 324# define NAME_MAX 4096
75#endif 325#endif
76 326
327/* used for readlink etc. */
328#ifndef PATH_MAX
329# define PATH_MAX 0
330#endif
331
332#ifndef EIO_PATH_MIN
333# define EIO_PATH_MIN 8160
334#endif
335
336#define EIO_PATH_MAX (PATH_MAX <= EIO_PATH_MIN ? EIO_PATH_MIN : PATH_MAX)
337
77/* buffer size for various temporary buffers */ 338/* buffer size for various temporary buffers */
78#define EIO_BUFSIZE 65536 339#define EIO_BUFSIZE 65536
79 340
80#define dBUF \ 341#define dBUF \
81 char *eio_buf; \
82 X_LOCK (wrklock); \
83 self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \ 342 char *eio_buf = malloc (EIO_BUFSIZE); \
84 X_UNLOCK (wrklock); \ 343 errno = ENOMEM; \
85 if (!eio_buf) \ 344 if (!eio_buf) \
86 return -1; 345 return -1
87 346
88#define EIO_TICKS ((1000000 + 1023) >> 10) 347#define FUBd \
348 free (eio_buf)
89 349
90static void (*want_poll_cb) (void); 350/*****************************************************************************/
91static void (*done_poll_cb) (void);
92 351
93static unsigned int max_poll_time = 0; 352struct etp_tmpbuf;
94static unsigned int max_poll_reqs = 0;
95 353
96/* calculcate time difference in ~1/EIO_TICKS of a second */ 354#if _POSIX_VERSION >= 200809L
97static int tvdiff (struct timeval *tv1, struct timeval *tv2) 355 #define HAVE_AT 1
98{ 356 #define WD2FD(wd) ((wd) ? (wd)->fd : AT_FDCWD)
99 return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS 357 #ifndef O_SEARCH
100 + ((tv2->tv_usec - tv1->tv_usec) >> 10); 358 #define O_SEARCH O_RDONLY
101} 359 #endif
360#else
361 #define HAVE_AT 0
362 static const char *wd_expand (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path);
363#endif
102 364
103static unsigned int started, idle, wanted; 365struct 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{ 366{
124 if (wrk->dirp) 367#if HAVE_AT
125 { 368 int fd;
126 closedir (wrk->dirp); 369#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; 370 int len;
198} reqq; 371 char str[1]; /* actually, a 0-terminated canonical path */
372};
199 373
200static reqq req_queue; 374/*****************************************************************************/
201static reqq res_queue;
202 375
203static int reqq_push (reqq *q, eio_req *req) 376#define ETP_PRI_MIN EIO_PRI_MIN
204{ 377#define ETP_PRI_MAX EIO_PRI_MAX
205 int pri = req->pri;
206 req->next = 0;
207 378
208 if (q->qe[pri]) 379#define ETP_TYPE_QUIT -1
209 { 380#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;
215 381
216 return q->size++; 382static void eio_nop_callback (void) { }
217} 383static void (*eio_want_poll_cb)(void) = eio_nop_callback;
384static void (*eio_done_poll_cb)(void) = eio_nop_callback;
218 385
219static eio_req *reqq_shift (reqq *q) 386#define ETP_WANT_POLL(pool) eio_want_poll_cb ()
220{ 387#define ETP_DONE_POLL(pool) eio_done_poll_cb ()
221 int pri;
222 388
223 if (!q->size) 389struct etp_worker;
224 return 0; 390#define ETP_REQ eio_req
391#define ETP_DESTROY(req) eio_destroy (req)
392static int eio_finish (eio_req *req);
393#define ETP_FINISH(req) eio_finish (req)
394static void eio_execute (struct etp_worker *self, eio_req *req);
395#define ETP_EXECUTE(wrk,req) eio_execute (wrk, req)
225 396
226 --q->size; 397#include "etp.c"
227 398
228 for (pri = EIO_NUM_PRI; pri--; ) 399static struct etp_pool eio_pool;
229 { 400#define EIO_POOL (&eio_pool)
230 eio_req *req = q->qs[pri];
231 401
232 if (req) 402/*****************************************************************************/
233 {
234 if (!(q->qs[pri] = (eio_req *)req->next))
235 q->qe[pri] = 0;
236 403
237 return req; 404static void
238 }
239 }
240
241 abort ();
242}
243
244static void grp_try_feed (eio_req *grp) 405grp_try_feed (eio_req *grp)
245{ 406{
246 while (grp->size < grp->int2 && !EIO_CANCELLED (grp)) 407 while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
247 { 408 {
248 int old_len = grp->size; 409 grp->flags &= ~ETP_FLAG_GROUPADD;
249 410
250 EIO_FEED (grp); 411 EIO_FEED (grp);
251 412
252 /* stop if no progress has been made */ 413 /* stop if no progress has been made */
253 if (old_len == grp->size) 414 if (!(grp->flags & ETP_FLAG_GROUPADD))
254 { 415 {
255 grp->feed = 0; 416 grp->feed = 0;
256 break; 417 break;
257 } 418 }
258 } 419 }
259} 420}
260 421
261static int eio_finish (eio_req *req); 422static int
262
263static int grp_dec (eio_req *grp) 423grp_dec (eio_req *grp)
264{ 424{
265 --grp->size; 425 --grp->size;
266 426
267 /* call feeder, if applicable */ 427 /* call feeder, if applicable */
268 grp_try_feed (grp); 428 grp_try_feed (grp);
269 429
270 /* finish, if done */ 430 /* finish, if done */
271 if (!grp->size && grp->int1) 431 if (!grp->size && grp->flags & ETP_FLAG_DELAYED)
272 return eio_finish (grp); 432 return eio_finish (grp);
273 else 433 else
274 return 0; 434 return 0;
275} 435}
276 436
437static void
277void eio_destroy (eio_req *req) 438eio_destroy (eio_req *req)
278{ 439{
440 if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
279 if ((req)->flags & EIO_FLAG_PTR2_FREE) 441 if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
280 free (req->ptr2);
281 442
282 EIO_DESTROY (req); 443 EIO_DESTROY (req);
283} 444}
284 445
446static int
285static int eio_finish (eio_req *req) 447eio_finish (eio_req *req)
286{ 448{
287 int res = EIO_FINISH (req); 449 int res = EIO_FINISH (req);
288 450
289 if (req->grp) 451 if (req->grp)
290 { 452 {
… …
298 if (grp->grp_first == req) 460 if (grp->grp_first == req)
299 grp->grp_first = req->grp_next; 461 grp->grp_first = req->grp_next;
300 462
301 res2 = grp_dec (grp); 463 res2 = grp_dec (grp);
302 464
303 if (!res && res2) 465 if (!res)
304 res = res2; 466 res = res2;
305 } 467 }
306 468
307 eio_destroy (req); 469 eio_destroy (req);
308 470
309 return res; 471 return res;
310} 472}
311 473
474void
312void eio_grp_cancel (eio_req *grp) 475eio_grp_cancel (eio_req *grp)
313{ 476{
314 for (grp = grp->grp_first; grp; grp = grp->grp_next) 477 etp_grp_cancel (EIO_POOL, grp);
315 eio_cancel (grp);
316} 478}
317 479
480void
318void eio_cancel (eio_req *req) 481eio_cancel (eio_req *req)
319{ 482{
320 req->flags |= EIO_FLAG_CANCELLED; 483 etp_cancel (EIO_POOL, req);
321
322 eio_grp_cancel (req);
323} 484}
324 485
325X_THREAD_PROC (eio_proc); 486void
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) 487eio_submit (eio_req *req)
363{ 488{
364 ++nreqs; 489 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} 490}
374 491
375static void end_thread (void) 492unsigned int
493eio_nreqs (void)
376{ 494{
377 eio_req *req = calloc (1, sizeof (eio_req)); 495 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} 496}
391 497
498unsigned int
499eio_nready (void)
500{
501 return etp_nready (EIO_POOL);
502}
503
504unsigned int
505eio_npending (void)
506{
507 return etp_npending (EIO_POOL);
508}
509
510unsigned int ecb_cold
511eio_nthreads (void)
512{
513 return etp_nthreads (EIO_POOL);
514}
515
516void ecb_cold
392void eio_set_max_poll_time (double nseconds) 517eio_set_max_poll_time (double nseconds)
393{ 518{
394 if (WORDACCESS_UNSAFE) X_LOCK (reqlock); 519 etp_set_max_poll_time (EIO_POOL, nseconds);
395 max_poll_time = nseconds;
396 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
397} 520}
398 521
522void ecb_cold
399void eio_set_max_poll_reqs (unsigned int maxreqs) 523eio_set_max_poll_reqs (unsigned int maxreqs)
400{ 524{
401 if (WORDACCESS_UNSAFE) X_LOCK (reqlock); 525 etp_set_max_poll_reqs (EIO_POOL, maxreqs);
402 max_poll_reqs = maxreqs;
403 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
404} 526}
405 527
528void ecb_cold
406void eio_set_max_idle (unsigned int nthreads) 529eio_set_max_idle (unsigned int nthreads)
407{ 530{
408 if (WORDACCESS_UNSAFE) X_LOCK (reqlock); 531 etp_set_max_idle (EIO_POOL, nthreads);
409 max_idle = nthreads <= 0 ? 1 : nthreads;
410 if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
411} 532}
412 533
534void ecb_cold
535eio_set_idle_timeout (unsigned int seconds)
536{
537 etp_set_idle_timeout (EIO_POOL, seconds);
538}
539
540void ecb_cold
413void eio_set_min_parallel (unsigned int nthreads) 541eio_set_min_parallel (unsigned int nthreads)
414{ 542{
415 if (wanted < nthreads) 543 etp_set_min_parallel (EIO_POOL, nthreads);
416 wanted = nthreads;
417} 544}
418 545
546void ecb_cold
419void eio_set_max_parallel (unsigned int nthreads) 547eio_set_max_parallel (unsigned int nthreads)
420{ 548{
421 if (wanted > nthreads) 549 etp_set_max_parallel (EIO_POOL, nthreads);
422 wanted = nthreads;
423
424 while (started > wanted)
425 end_thread ();
426} 550}
427 551
428int eio_poll (void) 552int eio_poll (void)
429{ 553{
430 int maxreqs = max_poll_reqs; 554 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} 555}
486 556
487/*****************************************************************************/ 557/*****************************************************************************/
488/* work around various missing functions */ 558/* work around various missing functions */
489 559
490#if !HAVE_PREADWRITE 560#if HAVE_POSIX_CLOSE && !__linux
491# define pread aio_pread 561# define eio__close(fd) posix_close (fd, 0)
492# define pwrite aio_pwrite 562#else
493 563# define eio__close(fd) close (fd)
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 564#endif
531 565
566/* close() without disturbing errno */
567static void
568silent_close (int fd)
569{
570 int saved_errno = errno;
571 eio__close (fd);
572 errno = saved_errno;
573}
574
532#ifndef HAVE_FUTIMES 575#ifndef HAVE_UTIMES
533 576
577# undef utimes
534# define utimes(path,times) aio_utimes (path, times) 578# define utimes(path,times) eio__utimes (path, times)
535# define futimes(fd,times) aio_futimes (fd, times)
536 579
580static int
537static int aio_utimes (const char *filename, const struct timeval times[2]) 581eio__utimes (const char *filename, const struct timeval times[2])
538{ 582{
539 if (times) 583 if (times)
540 { 584 {
541 struct utimbuf buf; 585 struct utimbuf buf;
542 586
… …
547 } 591 }
548 else 592 else
549 return utime (filename, 0); 593 return utime (filename, 0);
550} 594}
551 595
596#endif
597
598#ifndef HAVE_FUTIMES
599
600# undef futimes
601# define futimes(fd,times) eio__futimes (fd, times)
602
603static int
552static int aio_futimes (int fd, const struct timeval tv[2]) 604eio__futimes (int fd, const struct timeval tv[2])
553{ 605{
554 errno = ENOSYS; 606 errno = ENOSYS;
555 return -1; 607 return -1;
556} 608}
557 609
558#endif 610#endif
559 611
560#if !HAVE_FDATASYNC 612#if !HAVE_FDATASYNC
613# undef fdatasync
561# define fdatasync fsync 614# define fdatasync(fd) fsync (fd)
562#endif 615#endif
616
617static int
618eio__syncfs (int fd)
619{
620 int res;
621
622#if HAVE_SYS_SYNCFS
623 res = (int)syscall (__NR_syncfs, (int)(fd));
624#else
625 res = EIO_ENOSYS ();
626#endif
627
628 if (res < 0 && errno == ENOSYS && fd >= 0)
629 sync ();
630
631 return res;
632}
633
634/* sync_file_range always needs emulation */
635static int
636eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
637{
638#if HAVE_SYNC_FILE_RANGE
639 int res;
640
641 if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE
642 || EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE
643 || EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER)
644 {
645 flags = 0
646 | (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0)
647 | (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0)
648 | (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0);
649 }
650
651 res = sync_file_range (fd, offset, nbytes, flags);
652
653 if (!res || errno != ENOSYS)
654 return res;
655#endif
656
657 /* even though we could play tricks with the flags, it's better to always
658 * call fdatasync, as that matches the expectation of its users best */
659 return fdatasync (fd);
660}
661
662static int
663eio__fallocate (int fd, int mode, off_t offset, size_t len)
664{
665#if HAVE_LINUX_FALLOCATE
666 return fallocate (fd, mode, offset, len);
667#else
668 return EIO_ENOSYS ();
669#endif
670}
563 671
564#if !HAVE_READAHEAD 672#if !HAVE_READAHEAD
673# undef readahead
565# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self) 674# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
566 675
676static eio_ssize_t
567static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self) 677eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
568{ 678{
569 size_t todo = count; 679 size_t todo = count;
570 dBUF; 680 dBUF;
571 681
572 while (todo > 0) 682 while (todo > 0)
573 { 683 {
574 size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE; 684 size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE;
575 685
576 pread (fd, aio_buf, len, offset); 686 pread (fd, eio_buf, len, offset);
577 offset += len; 687 offset += len;
578 todo -= len; 688 todo -= len;
579 } 689 }
580 690
581 errno = 0; 691 FUBd;
692
693 /* linux's readahead basically only fails for EBADF or EINVAL (not mmappable) */
694 /* but not for e.g. EIO or eof, so we also never fail */
582 return count; 695 return 0;
583} 696}
584 697
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 698#endif
616 699
617/* sendfile always needs emulation */ 700/* sendfile always needs emulation */
701static eio_ssize_t
618static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self) 702eio__sendfile (int ofd, int ifd, off_t offset, size_t count)
619{ 703{
704 eio_ssize_t written = 0;
620 ssize_t res; 705 eio_ssize_t res;
621 706
622 if (!count) 707 if (!count)
623 return 0; 708 return 0;
624 709
710 for (;;)
711 {
712#ifdef __APPLE__
713# undef HAVE_SENDFILE /* broken, as everything on os x */
714#endif
625#if HAVE_SENDFILE 715#if HAVE_SENDFILE
626# if __linux 716# if __linux
717 off_t soffset = offset;
627 res = sendfile (ofd, ifd, &offset, count); 718 res = sendfile (ofd, ifd, &soffset, count);
628 719
629# elif __freebsd 720# elif __FreeBSD__
630 /* 721 /*
631 * Of course, the freebsd sendfile is a dire hack with no thoughts 722 * Of course, the freebsd sendfile is a dire hack with no thoughts
632 * wasted on making it similar to other I/O functions. 723 * wasted on making it similar to other I/O functions.
633 */ 724 */
634 {
635 off_t sbytes; 725 off_t sbytes;
636 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); 726 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
637 727
638 if (res < 0 && sbytes) 728 #if 0 /* according to the manpage, this is correct, but broken behaviour */
639 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */ 729 /* freebsd' sendfile will return 0 on success */
730 /* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */
731 /* not on e.g. EIO or EPIPE - sounds broken */
732 if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0)
640 res = sbytes; 733 res = sbytes;
641 } 734 #endif
735
736 /* according to source inspection, this is correct, and useful behaviour */
737 if (sbytes)
738 res = sbytes;
739
740# elif defined __APPLE__
741 off_t sbytes = count;
742 res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
743
744 /* according to the manpage, sbytes is always valid */
745 if (sbytes)
746 res = sbytes;
642 747
643# elif __hpux 748# elif __hpux
644 res = sendfile (ofd, ifd, offset, count, 0, 0); 749 res = sendfile (ofd, ifd, offset, count, 0, 0);
645 750
646# elif __solaris 751# elif __solaris
647 {
648 struct sendfilevec vec; 752 struct sendfilevec vec;
649 size_t sbytes; 753 size_t sbytes;
650 754
651 vec.sfv_fd = ifd; 755 vec.sfv_fd = ifd;
652 vec.sfv_flag = 0; 756 vec.sfv_flag = 0;
653 vec.sfv_off = offset; 757 vec.sfv_off = offset;
654 vec.sfv_len = count; 758 vec.sfv_len = count;
655 759
656 res = sendfilev (ofd, &vec, 1, &sbytes); 760 res = sendfilev (ofd, &vec, 1, &sbytes);
657 761
658 if (res < 0 && sbytes) 762 if (res < 0 && sbytes)
659 res = sbytes; 763 res = sbytes;
660 }
661 764
662# endif 765# endif
766
767#elif defined (_WIN32) && 0
768 /* does not work, just for documentation of what would need to be done */
769 /* actually, cannot be done like this, as TransmitFile changes the file offset, */
770 /* libeio guarantees that the file offset does not change, and windows */
771 /* has no way to get an independent handle to the same file description */
772 HANDLE h = TO_SOCKET (ifd);
773 SetFilePointer (h, offset, 0, FILE_BEGIN);
774 res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
775
663#else 776#else
664 res = -1; 777 res = EIO_ENOSYS ();
665 errno = ENOSYS;
666#endif 778#endif
667 779
780 /* we assume sendfile can copy at least 128mb in one go */
781 if (res <= 128 * 1024 * 1024)
782 {
783 if (res > 0)
784 written += res;
785
786 if (written)
787 return written;
788
789 break;
790 }
791 else
792 {
793 /* if we requested more, then probably the kernel was lazy */
794 written += res;
795 offset += res;
796 count -= res;
797
798 if (!count)
799 return written;
800 }
801 }
802
668 if (res < 0 803 if (res < 0
669 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK 804 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
805 /* BSDs */
806#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */
807 || errno == ENOTSUP
808#endif
809#ifdef EOPNOTSUPP /* windows */
810 || errno == EOPNOTSUPP /* BSDs */
811#endif
670#if __solaris 812#if __solaris
671 || errno == EAFNOSUPPORT || errno == EPROTOTYPE 813 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
672#endif 814#endif
673 ) 815 )
674 ) 816 )
… …
678 820
679 res = 0; 821 res = 0;
680 822
681 while (count) 823 while (count)
682 { 824 {
683 ssize_t cnt; 825 eio_ssize_t cnt;
684 826
685 cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset); 827 cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);
686 828
687 if (cnt <= 0) 829 if (cnt <= 0)
688 { 830 {
… …
700 842
701 offset += cnt; 843 offset += cnt;
702 res += cnt; 844 res += cnt;
703 count -= cnt; 845 count -= cnt;
704 } 846 }
847
848 FUBd;
705 } 849 }
706 850
707 return res; 851 return res;
708} 852}
709 853
710/* read a full directory */ 854#ifdef PAGESIZE
711static void scandir_ (eio_req *req, worker *self) 855# define eio_pagesize() PAGESIZE
856#else
857static intptr_t
858eio_pagesize (void)
712{ 859{
713 DIR *dirp; 860 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;
724 861
725 X_LOCK (wrklock); 862 if (!page)
726 self->dirp = dirp = opendir (req->ptr1); 863 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);
731 864
732 if (dirp && u && names) 865 return page;
733 for (;;) 866}
867#endif
868
869static void
870eio_page_align (void **addr, size_t *length)
871{
872 intptr_t mask = eio_pagesize () - 1;
873
874 /* round down addr */
875 intptr_t adj = mask & (intptr_t)*addr;
876
877 *addr = (void *)((intptr_t)*addr - adj);
878 *length += adj;
879
880 /* round up length */
881 *length = (*length + mask) & ~mask;
882}
883
884#if !_POSIX_MEMLOCK
885# define eio__mlockall(a) EIO_ENOSYS ()
886#else
887
888static int
889eio__mlockall (int flags)
890{
891 #if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
892 extern int mallopt (int, int);
893 mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
894 #endif
895
896 if (EIO_MCL_CURRENT != MCL_CURRENT
897 || EIO_MCL_FUTURE != MCL_FUTURE)
898 {
899 flags = 0
900 | (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0)
901 | (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0);
902 }
903
904 return mlockall (flags);
905}
906#endif
907
908#if !_POSIX_MEMLOCK_RANGE
909# define eio__mlock(a,b) EIO_ENOSYS ()
910#else
911
912static int
913eio__mlock (void *addr, size_t length)
914{
915 eio_page_align (&addr, &length);
916
917 return mlock (addr, length);
918}
919
920#endif
921
922#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
923# define eio__msync(a,b,c) EIO_ENOSYS ()
924#else
925
926static int
927eio__msync (void *mem, size_t len, int flags)
928{
929 eio_page_align (&mem, &len);
930
931 if (EIO_MS_ASYNC != MS_SYNC
932 || EIO_MS_INVALIDATE != MS_INVALIDATE
933 || EIO_MS_SYNC != MS_SYNC)
934 {
935 flags = 0
936 | (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
937 | (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
938 | (flags & EIO_MS_SYNC ? MS_SYNC : 0);
939 }
940
941 return msync (mem, len, flags);
942}
943
944#endif
945
946static int
947eio__mtouch (eio_req *req)
948{
949 void *mem = req->ptr2;
950 size_t len = req->size;
951 int flags = req->int1;
952
953 eio_page_align (&mem, &len);
954
955 {
956 intptr_t addr = (intptr_t)mem;
957 intptr_t end = addr + len;
958 intptr_t page = eio_pagesize ();
959
960 if (addr < end)
961 if (flags & EIO_MT_MODIFY) /* modify */
962 do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req));
963 else
964 do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req));
965 }
966
967 return 0;
968}
969
970/*****************************************************************************/
971/* requests implemented outside eio_execute, because they are so large */
972
973static void
974eio__lseek (eio_req *req)
975{
976 /* this usually gets optimised away completely, or your compiler sucks, */
977 /* or the whence constants really are not 0, 1, 2 */
978 int whence = req->int2 == EIO_SEEK_SET ? SEEK_SET
979 : req->int2 == EIO_SEEK_CUR ? SEEK_CUR
980 : req->int2 == EIO_SEEK_END ? SEEK_END
981 : req->int2;
982
983 req->offs = lseek (req->int1, req->offs, whence);
984 req->result = req->offs == (off_t)-1 ? -1 : 0;
985}
986
987/* result will always end up in tmpbuf, there is always space for adding a 0-byte */
988static int
989eio__realpath (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path)
990{
991 char *res;
992 const char *rel = path;
993 char *tmp1, *tmp2;
994#if SYMLOOP_MAX > 32
995 int symlinks = SYMLOOP_MAX;
996#else
997 int symlinks = 32;
998#endif
999
1000 errno = EINVAL;
1001 if (!rel)
1002 return -1;
1003
1004 errno = ENOENT;
1005 if (!*rel)
1006 return -1;
1007
1008 res = etp_tmpbuf_get (tmpbuf, EIO_PATH_MAX * 3);
1009#ifdef _WIN32
1010 if (_access (rel, 4) != 0)
1011 return -1;
1012
1013 symlinks = GetFullPathName (rel, EIO_PATH_MAX * 3, res, 0);
1014
1015 errno = ENAMETOOLONG;
1016 if (symlinks >= EIO_PATH_MAX * 3)
1017 return -1;
1018
1019 errno = EIO;
1020 if (symlinks <= 0)
1021 return -1;
1022
1023 return symlinks;
1024
1025#else
1026 tmp1 = res + EIO_PATH_MAX;
1027 tmp2 = tmp1 + EIO_PATH_MAX;
1028
1029#if 0 /* disabled, the musl way to do things is just too racy */
1030#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
1031 /* on linux we may be able to ask the kernel */
1032 {
1033 int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME);
1034
1035 if (fd >= 0)
734 { 1036 {
1037 sprintf (tmp1, "/proc/self/fd/%d", fd);
1038 req->result = readlink (tmp1, res, EIO_PATH_MAX);
1039 /* here we should probably stat the open file and the disk file, to make sure they still match */
1040 eio__close (fd);
1041
1042 if (req->result > 0)
1043 goto done;
1044 }
1045 else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)
1046 return -1;
1047 }
1048#endif
1049#endif
1050
1051 if (*rel != '/')
1052 {
1053 int len;
1054
735 errno = 0; 1055 errno = ENOENT;
736 readdir_r (dirp, &u->d, &entp); 1056 if (wd == EIO_INVALID_WD)
1057 return -1;
1058
1059 if (wd == EIO_CWD)
1060 {
1061 if (!getcwd (res, EIO_PATH_MAX))
1062 return -1;
737 1063
738 if (!entp) 1064 len = strlen (res);
1065 }
1066 else
1067 memcpy (res, wd->str, len = wd->len);
1068
1069 if (res [1]) /* only use if not / */
1070 res += len;
1071 }
1072
1073 while (*rel)
1074 {
1075 eio_ssize_t len, linklen;
1076 const char *beg = rel;
1077
1078 while (*rel && *rel != '/')
1079 ++rel;
1080
1081 len = rel - beg;
1082
1083 if (!len) /* skip slashes */
1084 {
739 break; 1085 ++rel;
1086 continue;
1087 }
740 1088
741 name = entp->d_name; 1089 if (beg [0] == '.')
1090 {
1091 if (len == 1)
1092 continue; /* . - nop */
742 1093
743 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) 1094 if (beg [1] == '.' && len == 2)
1095 {
1096 /* .. - back up one component, if possible */
1097
1098 while (res != tmpbuf->ptr)
1099 if (*--res == '/')
1100 break;
1101
1102 continue;
1103 }
1104 }
1105
1106 errno = ENAMETOOLONG;
1107 if (res + 1 + len + 1 >= tmp1)
1108 return -1;
1109
1110 /* copy one component */
1111 *res = '/';
1112 memcpy (res + 1, beg, len);
1113
1114 /* zero-terminate, for readlink */
1115 res [len + 1] = 0;
1116
1117 /* now check if it's a symlink */
1118 linklen = readlink (tmpbuf->ptr, tmp1, EIO_PATH_MAX);
1119
1120 if (linklen < 0)
744 { 1121 {
745 int len = strlen (name) + 1; 1122 if (errno != EINVAL)
1123 return -1;
746 1124
747 res++; 1125 /* 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; 1126 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 } 1127 }
1120 else 1128 else
1121 { 1129 {
1122 /* read: grow scalar as necessary */ 1130 /* yay, it was a symlink - build new path in tmp2 */
1123 svptr = SvGROW (data, len + dataoffset + 1); 1131 int rellen = strlen (rel);
1132
1133 errno = ENAMETOOLONG;
1134 if (linklen + 1 + rellen >= EIO_PATH_MAX) /* also catch linklen >= EIO_PATH_MAX */
1135 return -1;
1136
1137 errno = ELOOP;
1138 if (!--symlinks)
1139 return -1;
1140
1141 if (*tmp1 == '/')
1142 res = tmpbuf->ptr; /* symlink resolves to an absolute path */
1143
1144 /* we need to be careful, as rel might point into tmp2 already */
1145 memmove (tmp2 + linklen + 1, rel, rellen + 1);
1146 tmp2 [linklen] = '/';
1147 memcpy (tmp2, tmp1, linklen);
1148
1149 rel = tmp2;
1124 } 1150 }
1151 }
1125 1152
1153 /* special case for the lone root path */
1154 if (res == tmpbuf->ptr)
1155 *res++ = '/';
1156
1157 return res - (char *)tmpbuf->ptr;
1158#endif
1159}
1160
1161static signed char
1162eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
1163{
1164 return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */
1165 : a->inode < b->inode ? -1
1166 : a->inode > b->inode ? 1
1167 : 0;
1168}
1169
1170#define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0
1171
1172#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */
1173#define EIO_SORT_FAST 60 /* when to only use insertion sort */
1174
1175static void
1176eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits)
1177{
1178 unsigned char bits [9 + sizeof (eio_ino_t) * 8];
1179 unsigned char *bit = bits;
1180
1181 assert (CHAR_BIT == 8);
1182 assert (sizeof (eio_dirent) * 8 < 256);
1183 assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */
1184 assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */
1185
1186 if (size <= EIO_SORT_FAST)
1187 return;
1188
1189 /* first prepare an array of bits to test in our radix sort */
1190 /* try to take endianness into account, as well as differences in eio_ino_t sizes */
1191 /* inode_bits must contain all inodes ORed together */
1192 /* which is used to skip bits that are 0 everywhere, which is very common */
1193 {
1194 eio_ino_t endianness;
1195 int i, j;
1196
1197 /* we store the byte offset of byte n into byte n of "endianness" */
1198 for (i = 0; i < sizeof (eio_ino_t); ++i)
1199 ((unsigned char *)&endianness)[i] = i;
1200
1201 *bit++ = 0;
1202
1203 for (i = 0; i < sizeof (eio_ino_t); ++i)
1204 {
1205 /* shifting off the byte offsets out of "endianness" */
1206 int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8;
1207 endianness >>= 8;
1208
1209 for (j = 0; j < 8; ++j)
1210 if (inode_bits & (((eio_ino_t)1) << (i * 8 + j)))
1211 *bit++ = offs + j;
1212 }
1213
1214 for (j = 0; j < 8; ++j)
1215 if (score_bits & (1 << j))
1216 *bit++ = offsetof (eio_dirent, score) * 8 + j;
1217 }
1218
1219 /* now actually do the sorting (a variant of MSD radix sort) */
1220 {
1221 eio_dirent *base_stk [9 + sizeof (eio_ino_t) * 8], *base;
1222 eio_dirent *end_stk [9 + sizeof (eio_ino_t) * 8], *end;
1223 unsigned char *bit_stk [9 + sizeof (eio_ino_t) * 8];
1224 int stk_idx = 0;
1225
1226 base_stk [stk_idx] = dents;
1227 end_stk [stk_idx] = dents + size;
1228 bit_stk [stk_idx] = bit - 1;
1229
1230 do
1231 {
1232 base = base_stk [stk_idx];
1233 end = end_stk [stk_idx];
1234 bit = bit_stk [stk_idx];
1235
1236 for (;;)
1237 {
1238 unsigned char O = *bit >> 3;
1239 unsigned char M = 1 << (*bit & 7);
1240
1241 eio_dirent *a = base;
1242 eio_dirent *b = end;
1243
1244 if (b - a < EIO_SORT_CUTOFF)
1245 break;
1246
1247 /* now bit-partition the array on the bit */
1248 /* this ugly asymmetric loop seems to perform much better than typical */
1249 /* partition algos found in the literature */
1250 do
1251 if (!(((unsigned char *)a)[O] & M))
1252 ++a;
1253 else if (!(((unsigned char *)--b)[O] & M))
1254 {
1255 eio_dirent tmp = *a; *a = *b; *b = tmp;
1256 ++a;
1257 }
1258 while (b > a);
1259
1260 /* next bit, or stop, if no bits left in this path */
1261 if (!*--bit)
1262 break;
1263
1264 base_stk [stk_idx] = a;
1265 end_stk [stk_idx] = end;
1266 bit_stk [stk_idx] = bit;
1267 ++stk_idx;
1268
1269 end = a;
1270 }
1271 }
1272 while (stk_idx--);
1273 }
1274}
1275
1276static void
1277eio_dent_insertion_sort (eio_dirent *dents, int size)
1278{
1279 /* first move the smallest element to the front, to act as a sentinel */
1280 {
1281 int i;
1282 eio_dirent *min = dents;
1283
1284 /* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */
1285 for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; )
1286 if (EIO_DENT_CMP (dents [i], <, *min))
1287 min = &dents [i];
1288
1289 /* swap elements 0 and j (minimum) */
1290 {
1291 eio_dirent tmp = *dents; *dents = *min; *min = tmp;
1292 }
1293 }
1294
1295 /* then do standard insertion sort, assuming that all elements are >= dents [0] */
1296 {
1297 eio_dirent *i, *j;
1298
1299 for (i = dents + 1; i < dents + size; ++i)
1300 {
1301 eio_dirent value = *i;
1302
1303 for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j)
1304 j [1] = j [0];
1305
1306 j [1] = value;
1307 }
1308 }
1309}
1310
1311static void
1312eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits)
1313{
1314 if (size <= 1)
1315 return; /* our insertion sort relies on size > 0 */
1316
1317 /* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */
1318 /* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */
1319 eio_dent_radix_sort (dents, size, score_bits, inode_bits);
1320
1321 /* use an insertion sort at the end, or for small arrays, */
1322 /* as insertion sort is more efficient for small partitions */
1323 eio_dent_insertion_sort (dents, size);
1324}
1325
1326/* read a full directory */
1327static void
1328eio__scandir (eio_req *req, etp_worker *self)
1329{
1330 char *name, *names;
1331 int namesalloc = 4096 - sizeof (void *) * 4;
1332 int namesoffs = 0;
1333 int flags = req->int1;
1334 eio_dirent *dents = 0;
1335 int dentalloc = 128;
1336 int dentoffs = 0;
1337 eio_ino_t inode_bits = 0;
1338#ifdef _WIN32
1339 HANDLE dirp;
1340 WIN32_FIND_DATA entp;
1341#else
1342 DIR *dirp;
1343 EIO_STRUCT_DIRENT *entp;
1344#endif
1345
1346 req->result = -1;
1347
1348 if (!(flags & EIO_READDIR_DENTS))
1349 flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
1350
1351#ifdef _WIN32
1352 {
1353 int len = strlen ((const char *)req->ptr1);
1354 char *path = malloc (MAX_PATH);
1355 const char *fmt;
1356 const char *reqpath = wd_expand (&self->tmpbuf, req->wd, req->ptr1);
1357
1358 if (!len)
1359 fmt = "./*";
1360 else if (reqpath[len - 1] == '/' || reqpath[len - 1] == '\\')
1361 fmt = "%s*";
1362 else
1363 fmt = "%s/*";
1364
1365 _snprintf (path, MAX_PATH, fmt, reqpath);
1366 dirp = FindFirstFile (path, &entp);
1367 free (path);
1368
1369 if (dirp == INVALID_HANDLE_VALUE)
1370 {
1371 /* should steal _dosmaperr */
1372 switch (GetLastError ())
1373 {
1374 case ERROR_FILE_NOT_FOUND:
1375 req->result = 0;
1376 break;
1377
1378 case ERROR_INVALID_NAME:
1379 case ERROR_PATH_NOT_FOUND:
1380 case ERROR_NO_MORE_FILES:
1381 errno = ENOENT;
1382 break;
1383
1384 case ERROR_NOT_ENOUGH_MEMORY:
1385 errno = ENOMEM;
1386 break;
1387
1388 default:
1389 errno = EINVAL;
1390 break;
1391 }
1392
1393 return;
1394 }
1395 }
1396#else
1397 #if HAVE_AT
1398 if (req->wd)
1399 {
1400 int fd = openat (WD2FD (req->wd), req->ptr1, O_CLOEXEC | O_SEARCH | O_DIRECTORY);
1401
1126 if (len < 0) 1402 if (fd < 0)
1127 croak ("length must not be negative"); 1403 return;
1128 1404
1405 dirp = fdopendir (fd);
1406
1407 if (!dirp)
1408 silent_close (fd);
1409 }
1410 else
1411 dirp = opendir (req->ptr1);
1412 #else
1413 dirp = opendir (wd_expand (&self->tmpbuf, req->wd, req->ptr1));
1414 #endif
1415
1416 if (!dirp)
1417 return;
1418#endif
1419
1420 if (req->flags & EIO_FLAG_PTR1_FREE)
1421 free (req->ptr1);
1422
1423 req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
1424 req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
1425 req->ptr2 = names = malloc (namesalloc);
1426
1427 if (!names || (flags && !dents))
1428 return;
1429
1430 for (;;)
1431 {
1432 int done;
1433
1434#ifdef _WIN32
1435 done = !dirp;
1436#else
1437 errno = 0;
1438 entp = readdir (dirp);
1439 done = !entp;
1440#endif
1441
1442 if (done)
1129 { 1443 {
1130 dREQ; 1444#ifndef _WIN32
1445 int old_errno = errno;
1446 closedir (dirp);
1447 errno = old_errno;
1131 1448
1132 req->type = ix; 1449 if (errno)
1133 req->sv1 = newSVsv (fh); 1450 break;
1134 req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh)) 1451#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 1452
1142 if (!SvREADONLY (data)) 1453 /* sort etc. */
1454 req->int1 = flags;
1455 req->result = dentoffs;
1456
1457 if (flags & EIO_READDIR_STAT_ORDER)
1458 eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits);
1459 else if (flags & EIO_READDIR_DIRS_FIRST)
1460 if (flags & EIO_READDIR_FOUND_UNKNOWN)
1461 eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */
1462 else
1463 {
1464 /* in this case, all is known, and we just put dirs first and sort them */
1465 eio_dirent *oth = dents + dentoffs;
1466 eio_dirent *dir = dents;
1467
1468 /* now partition dirs to the front, and non-dirs to the back */
1469 /* by walking from both sides and swapping if necessary */
1470 while (oth > dir)
1471 {
1472 if (dir->type == EIO_DT_DIR)
1473 ++dir;
1474 else if ((--oth)->type == EIO_DT_DIR)
1475 {
1476 eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
1477
1478 ++dir;
1479 }
1480 }
1481
1482 /* now sort the dirs only (dirs all have the same score) */
1483 eio_dent_sort (dents, dir - dents, 0, inode_bits);
1484 }
1485
1486 break;
1487 }
1488
1489 /* now add the entry to our list(s) */
1490 name = D_NAME (entp);
1491
1492 /* skip . and .. entries */
1493 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1494 {
1495 int len = D_NAMLEN (entp) + 1;
1496
1497 while (ecb_expect_false (namesoffs + len > namesalloc))
1143 { 1498 {
1144 SvREADONLY_on (data); 1499 namesalloc *= 2;
1145 req->flags |= FLAG_SV2_RO_OFF; 1500 req->ptr2 = names = realloc (names, namesalloc);
1501
1502 if (!names)
1503 break;
1146 } 1504 }
1147 1505
1148 EIO_SEND; 1506 memcpy (names + namesoffs, name, len);
1507
1508 if (dents)
1509 {
1510 struct eio_dirent *ent;
1511
1512 if (ecb_expect_false (dentoffs == dentalloc))
1513 {
1514 dentalloc *= 2;
1515 req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
1516
1517 if (!dents)
1518 break;
1519 }
1520
1521 ent = dents + dentoffs;
1522
1523 ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
1524 ent->namelen = len - 1;
1525 ent->inode = D_INO (entp);
1526
1527 inode_bits |= ent->inode;
1528
1529 switch (D_TYPE (entp))
1530 {
1531 default:
1532 ent->type = EIO_DT_UNKNOWN;
1533 flags |= EIO_READDIR_FOUND_UNKNOWN;
1534 break;
1535
1536 #ifdef DT_FIFO
1537 case DT_FIFO: ent->type = EIO_DT_FIFO; break;
1538 #endif
1539 #ifdef DT_CHR
1540 case DT_CHR: ent->type = EIO_DT_CHR; break;
1541 #endif
1542 #ifdef DT_MPC
1543 case DT_MPC: ent->type = EIO_DT_MPC; break;
1544 #endif
1545 #ifdef DT_DIR
1546 case DT_DIR: ent->type = EIO_DT_DIR; break;
1547 #endif
1548 #ifdef DT_NAM
1549 case DT_NAM: ent->type = EIO_DT_NAM; break;
1550 #endif
1551 #ifdef DT_BLK
1552 case DT_BLK: ent->type = EIO_DT_BLK; break;
1553 #endif
1554 #ifdef DT_MPB
1555 case DT_MPB: ent->type = EIO_DT_MPB; break;
1556 #endif
1557 #ifdef DT_REG
1558 case DT_REG: ent->type = EIO_DT_REG; break;
1559 #endif
1560 #ifdef DT_NWK
1561 case DT_NWK: ent->type = EIO_DT_NWK; break;
1562 #endif
1563 #ifdef DT_CMP
1564 case DT_CMP: ent->type = EIO_DT_CMP; break;
1565 #endif
1566 #ifdef DT_LNK
1567 case DT_LNK: ent->type = EIO_DT_LNK; break;
1568 #endif
1569 #ifdef DT_SOCK
1570 case DT_SOCK: ent->type = EIO_DT_SOCK; break;
1571 #endif
1572 #ifdef DT_DOOR
1573 case DT_DOOR: ent->type = EIO_DT_DOOR; break;
1574 #endif
1575 #ifdef DT_WHT
1576 case DT_WHT: ent->type = EIO_DT_WHT; break;
1577 #endif
1578 }
1579
1580 ent->score = 7;
1581
1582 if (flags & EIO_READDIR_DIRS_FIRST)
1583 {
1584 if (ent->type == EIO_DT_UNKNOWN)
1585 {
1586 if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
1587 ent->score = 1;
1588 else if (!strchr (name, '.')) /* absence of dots indicate likely dirs */
1589 ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
1590 }
1591 else if (ent->type == EIO_DT_DIR)
1592 ent->score = 0;
1593 }
1594 }
1595
1596 namesoffs += len;
1597 ++dentoffs;
1149 } 1598 }
1599
1600 if (EIO_CANCELLED (req))
1601 {
1602 errno = ECANCELED;
1603 break;
1604 }
1605
1606#ifdef _WIN32
1607 if (!FindNextFile (dirp, &entp))
1608 {
1609 FindClose (dirp);
1610 dirp = 0;
1611 }
1612#endif
1613 }
1614}
1615
1616/*****************************************************************************/
1617/* working directory stuff */
1618/* various deficiencies in the posix 2008 api force us to */
1619/* keep the absolute path in string form at all times */
1620/* fuck yeah. */
1621
1622#if !HAVE_AT
1623
1624/* a bit like realpath, but usually faster because it doesn'T have to return */
1625/* an absolute or canonical path */
1626static const char *
1627wd_expand (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path)
1628{
1629 if (!wd || *path == '/')
1630 return path;
1631
1632 if (path [0] == '.' && !path [1])
1633 return wd->str;
1634
1635 {
1636 int l1 = wd->len;
1637 int l2 = strlen (path);
1638
1639 char *res = etp_tmpbuf_get (tmpbuf, l1 + l2 + 2);
1640
1641 memcpy (res, wd->str, l1);
1642 res [l1] = '/';
1643 memcpy (res + l1 + 1, path, l2 + 1);
1644
1645 return res;
1646 }
1647}
1648
1649#endif
1650
1651static eio_wd
1652eio__wd_open_sync (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path)
1653{
1654 int fd;
1655 eio_wd res;
1656 int len = eio__realpath (tmpbuf, wd, path);
1657
1658 if (len < 0)
1659 return EIO_INVALID_WD;
1660
1661#if HAVE_AT
1662 fd = openat (WD2FD (wd), path, O_CLOEXEC | O_SEARCH | O_DIRECTORY);
1663
1664 if (fd < 0)
1665 return EIO_INVALID_WD;
1666#endif
1667
1668 res = malloc (sizeof (*res) + len); /* one extra 0-byte */
1669
1670#if HAVE_AT
1671 res->fd = fd;
1672#endif
1673
1674 res->len = len;
1675 memcpy (res->str, tmpbuf->ptr, len);
1676 res->str [len] = 0;
1677
1678 return res;
1679}
1680
1681eio_wd
1682eio_wd_open_sync (eio_wd wd, const char *path)
1683{
1684 struct etp_tmpbuf tmpbuf = { };
1685 wd = eio__wd_open_sync (&tmpbuf, wd, path);
1686 free (tmpbuf.ptr);
1687
1688 return wd;
1150} 1689}
1151 1690
1152void 1691void
1153aio_readlink (SV8 *path, SV *callback=&PL_sv_undef) 1692eio_wd_close_sync (eio_wd wd)
1154 PROTOTYPE: $$;$
1155 PPCODE:
1156{ 1693{
1157 SV *data; 1694 if (wd != EIO_INVALID_WD && wd != EIO_CWD)
1158 dREQ; 1695 {
1159 1696 #if HAVE_AT
1160 data = newSV (NAME_MAX); 1697 eio__close (wd->fd);
1161 SvPOK_on (data); 1698 #endif
1162 1699 free (wd);
1163 req->type = EIO_READLINK; 1700 }
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} 1701}
1702
1703#if HAVE_AT
1704
1705static int
1706eio__renameat2 (int olddirfd, const char *oldpath, int newdirfd, const char *newpath, unsigned int flags)
1707{
1708#if HAVE_RENAMEAT2
1709 return syscall (SYS_renameat2, olddirfd, oldpath, newdirfd, newpath, flags);
1710#else
1711 if (flags)
1712 return EIO_ENOSYS ();
1713
1714 return renameat (olddirfd, oldpath, newdirfd, newpath);
1715#endif
1716}
1717
1718/* they forgot these */
1719
1720static int
1721eio__truncateat (int dirfd, const char *path, off_t length)
1722{
1723 int fd = openat (dirfd, path, O_WRONLY | O_CLOEXEC);
1724 int res;
1725
1726 if (fd < 0)
1727 return fd;
1728
1729 res = ftruncate (fd, length);
1730 silent_close (fd);
1731 return res;
1732}
1733
1734static int
1735eio__statvfsat (int dirfd, const char *path, struct statvfs *buf)
1736{
1737 int fd = openat (dirfd, path, O_SEARCH | O_CLOEXEC);
1738 int res;
1739
1740 if (fd < 0)
1741 return fd;
1742
1743 res = fstatvfs (fd, buf);
1744 silent_close (fd);
1745 return res;
1746}
1747
1748#endif
1749
1750/*****************************************************************************/
1751
1752#define ALLOC(len) \
1753 if (!req->ptr2) \
1754 { \
1755 X_LOCK (EIO_POOL->wrklock); \
1756 req->flags |= EIO_FLAG_PTR2_FREE; \
1757 X_UNLOCK (EIO_POOL->wrklock); \
1758 req->ptr2 = malloc (len); \
1759 if (!req->ptr2) \
1760 { \
1761 errno = ENOMEM; \
1762 req->result = -1; \
1763 goto alloc_fail; \
1764 } \
1765 }
1766
1767/*****************************************************************************/
1768
1769static void
1770eio__slurp (int fd, eio_req *req)
1771{
1772 req->result = fd;
1773
1774 if (fd < 0)
1775 return;
1776
1777 if (req->offs < 0 || !req->size) /* do we need the size? */
1778 {
1779 off_t size = lseek (fd, 0, SEEK_END);
1780
1781 if (req->offs < 0)
1782 req->offs += size;
1783
1784 if (!req->size)
1785 req->size = size - req->offs;
1786 }
1787
1788 ALLOC (req->size);
1789 req->result = pread (fd, req->ptr2, req->size, req->offs);
1790
1791 silent_close (fd);
1792
1793alloc_fail:
1794 ;
1795}
1796
1797int ecb_cold
1798eio_init (void (*want_poll)(void), void (*done_poll)(void))
1799{
1800 eio_want_poll_cb = want_poll;
1801 eio_done_poll_cb = done_poll;
1802
1803 return etp_init (EIO_POOL, 0, 0, 0);
1804}
1805
1806ecb_inline void
1807eio_api_destroy (eio_req *req)
1808{
1809 free (req);
1810}
1811
1812#define REQ(rtype) \
1813 eio_req *req; \
1814 \
1815 req = (eio_req *)calloc (1, sizeof *req); \
1816 if (!req) \
1817 return 0; \
1818 \
1819 req->type = rtype; \
1820 req->pri = pri; \
1821 req->finish = cb; \
1822 req->data = data; \
1823 req->destroy = eio_api_destroy;
1824
1825#define SEND eio_submit (req); return req
1826
1827#define PATH \
1828 req->flags |= EIO_FLAG_PTR1_FREE; \
1829 req->ptr1 = strdup (path); \
1830 if (!req->ptr1) \
1831 { \
1832 eio_api_destroy (req); \
1833 return 0; \
1834 }
1835
1836#define SINGLEDOT(ptr) (0[(char *)(ptr)] == '.' && !1[(char *)(ptr)])
1837
1838static void
1839eio_execute (etp_worker *self, eio_req *req)
1840{
1841#if HAVE_AT
1842 int dirfd;
1843#else
1844 const char *path;
1845#endif
1846
1847 if (ecb_expect_false (EIO_CANCELLED (req)))
1848 {
1849 req->result = -1;
1850 req->errorno = ECANCELED;
1851 return;
1852 }
1853
1854 if (ecb_expect_false (req->wd == EIO_INVALID_WD))
1855 {
1856 req->result = -1;
1857 req->errorno = ENOENT;
1858 return;
1859 }
1860
1861 if (req->type >= EIO_OPEN)
1862 {
1863 #if HAVE_AT
1864 dirfd = WD2FD (req->wd);
1865 #else
1866 path = wd_expand (&self->tmpbuf, req->wd, req->ptr1);
1867 #endif
1868 }
1869
1870 switch (req->type)
1871 {
1872 case EIO_WD_OPEN: req->wd = eio__wd_open_sync (&self->tmpbuf, req->wd, req->ptr1);
1873 req->result = req->wd == EIO_INVALID_WD ? -1 : 0;
1874 break;
1875 case EIO_WD_CLOSE: req->result = 0;
1876 eio_wd_close_sync (req->wd); break;
1877
1878 case EIO_SEEK: eio__lseek (req); break;
1879 case EIO_READ: ALLOC (req->size);
1880 req->result = req->offs >= 0
1881 ? pread (req->int1, req->ptr2, req->size, req->offs)
1882 : read (req->int1, req->ptr2, req->size); break;
1883 case EIO_WRITE: req->result = req->offs >= 0
1884 ? pwrite (req->int1, req->ptr2, req->size, req->offs)
1885 : write (req->int1, req->ptr2, req->size); break;
1886
1887 case EIO_FCNTL: req->result = fcntl (req->int1, (int) req->int2, req->ptr2); break;
1888 case EIO_IOCTL: req->result = ioctl (req->int1, (unsigned long)req->int2, req->ptr2); break;
1889
1890 case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1891 case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size); break;
1892
1893#if HAVE_AT
1894
1895 case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1896 req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, 0); break;
1897 case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1898 req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, AT_SYMLINK_NOFOLLOW); break;
1899 case EIO_CHOWN: req->result = fchownat (dirfd, req->ptr1, req->int2, req->int3, 0); break;
1900 case EIO_CHMOD: req->result = fchmodat (dirfd, req->ptr1, (mode_t)req->int2, 0); break;
1901 case EIO_TRUNCATE: req->result = eio__truncateat (dirfd, req->ptr1, req->offs); break;
1902 case EIO_OPEN: req->result = openat (dirfd, req->ptr1, req->int1, (mode_t)req->int2); break;
1903 case EIO_SLURP: eio__slurp ( openat (dirfd, req->ptr1, O_RDONLY | O_CLOEXEC), req); break;
1904
1905 case EIO_UNLINK: req->result = unlinkat (dirfd, req->ptr1, 0); break;
1906 case EIO_RMDIR: /* complications arise because "." cannot be removed, so we might have to expand */
1907 req->result = req->wd && SINGLEDOT (req->ptr1)
1908 ? rmdir (req->wd->str)
1909 : unlinkat (dirfd, req->ptr1, AT_REMOVEDIR); break;
1910 case EIO_MKDIR: req->result = mkdirat (dirfd, req->ptr1, (mode_t)req->int2); break;
1911 case EIO_RENAME: req->result = eio__renameat2 (
1912 dirfd,
1913 /* complications arise because "." cannot be renamed, so we might have to expand */
1914 req->wd && SINGLEDOT (req->ptr1) ? req->wd->str : req->ptr1,
1915 WD2FD ((eio_wd)req->int3),
1916 req->ptr2,
1917 req->int2
1918 );
1919 break;
1920 case EIO_LINK: req->result = linkat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2, 0); break;
1921 case EIO_SYMLINK: req->result = symlinkat (req->ptr1, dirfd, req->ptr2); break;
1922 case EIO_MKNOD: req->result = mknodat (dirfd, req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
1923 case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
1924 req->result = eio__statvfsat (dirfd, req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
1925 case EIO_READLINK: ALLOC (EIO_PATH_MAX);
1926 req->result = readlinkat (dirfd, req->ptr1, req->ptr2, EIO_PATH_MAX);
1927 if (req->result == EIO_PATH_MAX)
1928 {
1929 req->result = -1;
1930 errno = ENAMETOOLONG;
1931 }
1932 break;
1933 case EIO_UTIME:
1934 case EIO_FUTIME:
1935 {
1936 struct timespec ts[2];
1937 struct timespec *times;
1938
1939 if (req->nv1 != -1. || req->nv2 != -1.)
1940 {
1941 ts[0].tv_sec = req->nv1;
1942 ts[0].tv_nsec = (req->nv1 - ts[0].tv_sec) * 1e9;
1943 ts[1].tv_sec = req->nv2;
1944 ts[1].tv_nsec = (req->nv2 - ts[1].tv_sec) * 1e9;
1945
1946 times = ts;
1947 }
1948 else
1949 times = 0;
1950
1951 req->result = req->type == EIO_FUTIME
1952 ? futimens (req->int1, times)
1953 : utimensat (dirfd, req->ptr1, times, 0);
1954 }
1955 break;
1956
1957#else
1958
1959 case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1960 req->result = stat (path , (EIO_STRUCT_STAT *)req->ptr2); break;
1961 case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1962 req->result = lstat (path , (EIO_STRUCT_STAT *)req->ptr2); break;
1963 case EIO_CHOWN: req->result = chown (path , req->int2, req->int3); break;
1964 case EIO_CHMOD: req->result = chmod (path , (mode_t)req->int2); break;
1965 case EIO_TRUNCATE: req->result = truncate (path , req->offs); break;
1966 case EIO_OPEN: req->result = open (path , req->int1, (mode_t)req->int2); break;
1967 case EIO_SLURP: eio__slurp ( open (path , O_RDONLY | O_CLOEXEC), req); break;
1968
1969 case EIO_UNLINK: req->result = unlink (path ); break;
1970 case EIO_RMDIR: req->result = rmdir (path ); break;
1971 case EIO_MKDIR: req->result = mkdir (path , (mode_t)req->int2); break;
1972 case EIO_RENAME: req->result = req->int2 ? EIO_ENOSYS () : rename (path, req->ptr2); break;
1973 case EIO_LINK: req->result = link (path , req->ptr2); break;
1974 case EIO_SYMLINK: req->result = symlink (path , req->ptr2); break;
1975 case EIO_MKNOD: req->result = mknod (path , (mode_t)req->int2, (dev_t)req->offs); break;
1976 case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
1977 req->result = statvfs (path , (EIO_STRUCT_STATVFS *)req->ptr2); break;
1978 case EIO_READLINK: ALLOC (EIO_PATH_MAX);
1979 req->result = readlink (path, req->ptr2, EIO_PATH_MAX);
1980 if (req->result == EIO_PATH_MAX)
1981 {
1982 req->result = -1;
1983 errno = ENAMETOOLONG;
1984 }
1985 break;
1986
1987 case EIO_UTIME:
1988 case EIO_FUTIME:
1989 {
1990 struct timeval tv[2];
1991 struct timeval *times;
1992
1993 if (req->nv1 != -1. || req->nv2 != -1.)
1994 {
1995 tv[0].tv_sec = req->nv1;
1996 tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1e6;
1997 tv[1].tv_sec = req->nv2;
1998 tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1e6;
1999
2000 times = tv;
2001 }
2002 else
2003 times = 0;
2004
2005 req->result = req->type == EIO_FUTIME
2006 ? futimes (req->int1, times)
2007 : utimes (req->ptr1, times);
2008 }
2009 break;
2010
2011#endif
2012
2013 case EIO_REALPATH: if (0 <= (req->result = eio__realpath (&self->tmpbuf, req->wd, req->ptr1)))
2014 {
2015 ALLOC (req->result);
2016 memcpy (req->ptr2, self->tmpbuf.ptr, req->result);
2017 }
2018 break;
2019
2020 case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2021 req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
2022
2023 case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
2024 req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
2025
2026 case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
2027 case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
2028 case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
2029
2030 case EIO_CLOSE: req->result = eio__close (req->int1); break;
2031 case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
2032 case EIO_SYNC: req->result = 0; sync (); break;
2033 case EIO_FSYNC: req->result = fsync (req->int1); break;
2034 case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
2035 case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break;
2036 case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
2037 case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
2038 case EIO_MTOUCH: req->result = eio__mtouch (req); break;
2039 case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
2040 case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
2041 case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;
2042
2043 case EIO_READDIR: eio__scandir (req, self); break;
2044
2045 case EIO_BUSY:
2046#ifdef _WIN32
2047 Sleep (req->nv1 * 1e3);
2048#else
2049 {
2050 struct timeval tv;
2051
2052 tv.tv_sec = req->nv1;
2053 tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6;
2054
2055 req->result = select (0, 0, 0, 0, &tv);
2056 }
2057#endif
2058 break;
2059
2060#if 0
2061 case EIO_GROUP:
2062 abort (); /* handled in eio_request */
2063#endif
2064
2065 case EIO_NOP:
2066 req->result = 0;
2067 break;
2068
2069 case EIO_CUSTOM:
2070 req->feed (req);
2071 break;
2072
2073 default:
2074 req->result = EIO_ENOSYS ();
2075 break;
2076 }
2077
2078alloc_fail:
2079 req->errorno = errno;
2080}
2081
2082#ifndef EIO_NO_WRAPPERS
2083
2084eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data)
2085{
2086 REQ (EIO_WD_OPEN); PATH; SEND;
2087}
2088
2089eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data)
2090{
2091 REQ (EIO_WD_CLOSE); req->wd = wd; SEND;
2092}
2093
2094eio_req *eio_nop (int pri, eio_cb cb, void *data)
2095{
2096 REQ (EIO_NOP); SEND;
2097}
2098
2099eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
2100{
2101 REQ (EIO_BUSY); req->nv1 = delay; SEND;
2102}
2103
2104eio_req *eio_sync (int pri, eio_cb cb, void *data)
2105{
2106 REQ (EIO_SYNC); SEND;
2107}
2108
2109eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
2110{
2111 REQ (EIO_FSYNC); req->int1 = fd; SEND;
2112}
2113
2114eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
2115{
2116 REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
2117}
2118
2119eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
2120{
2121 REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
2122}
2123
2124eio_req *eio_syncfs (int fd, int pri, eio_cb cb, void *data)
2125{
2126 REQ (EIO_SYNCFS); req->int1 = fd; SEND;
2127}
2128
2129eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
2130{
2131 REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
2132}
2133
2134eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
2135{
2136 REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
2137}
2138
2139eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data)
2140{
2141 REQ (EIO_MLOCK); req->ptr2 = addr; req->size = length; SEND;
2142}
2143
2144eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)
2145{
2146 REQ (EIO_MLOCKALL); req->int1 = flags; SEND;
2147}
2148
2149eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)
2150{
2151 REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;
2152}
2153
2154eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
2155{
2156 REQ (EIO_CLOSE); req->int1 = fd; SEND;
2157}
2158
2159eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
2160{
2161 REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
2162}
2163
2164eio_req *eio_seek (int fd, off_t offset, int whence, int pri, eio_cb cb, void *data)
2165{
2166 REQ (EIO_SEEK); req->int1 = fd; req->offs = offset; req->int2 = whence; SEND;
2167}
2168
2169eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
2170{
2171 REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
2172}
2173
2174eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
2175{
2176 REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
2177}
2178
2179eio_req *eio_fcntl (int fd, int cmd, void *arg, int pri, eio_cb cb, void *data)
2180{
2181 REQ (EIO_IOCTL); req->int1 = fd; req->int2 = cmd; req->ptr2 = arg; SEND;
2182}
2183
2184eio_req *eio_ioctl (int fd, unsigned long request, void *buf, int pri, eio_cb cb, void *data)
2185{
2186 REQ (EIO_IOCTL); req->int1 = fd; req->int2 = request; req->ptr2 = buf; SEND;
2187}
2188
2189eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
2190{
2191 REQ (EIO_FSTAT); req->int1 = fd; SEND;
2192}
2193
2194eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data)
2195{
2196 REQ (EIO_FSTATVFS); req->int1 = fd; SEND;
2197}
2198
2199eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
2200{
2201 REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
2202}
2203
2204eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
2205{
2206 REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
2207}
2208
2209eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
2210{
2211 REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
2212}
2213
2214eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
2215{
2216 REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
2217}
2218
2219eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
2220{
2221 REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
2222}
2223
2224eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data)
2225{
2226 REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
2227}
2228
2229eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
2230{
2231 REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
2232}
2233
2234eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
2235{
2236 REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
2237}
2238
2239eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
2240{
2241 REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
2242}
2243
2244eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
2245{
2246 REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
2247}
2248
2249eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
2250{
2251 REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
2252}
2253
2254eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
2255{
2256 REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
2257}
2258
2259static eio_req *
2260eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
2261{
2262 REQ (type); PATH; SEND;
2263}
2264
2265eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
2266{
2267 return eio__1path (EIO_READLINK, path, pri, cb, data);
2268}
2269
2270eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data)
2271{
2272 return eio__1path (EIO_REALPATH, path, pri, cb, data);
2273}
2274
2275eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
2276{
2277 return eio__1path (EIO_STAT, path, pri, cb, data);
2278}
2279
2280eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
2281{
2282 return eio__1path (EIO_LSTAT, path, pri, cb, data);
2283}
2284
2285eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data)
2286{
2287 return eio__1path (EIO_STATVFS, path, pri, cb, data);
2288}
2289
2290eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
2291{
2292 return eio__1path (EIO_UNLINK, path, pri, cb, data);
2293}
2294
2295eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
2296{
2297 return eio__1path (EIO_RMDIR, path, pri, cb, data);
2298}
2299
2300eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data)
2301{
2302 REQ (EIO_READDIR); PATH; req->int1 = flags; SEND;
2303}
2304
2305eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
2306{
2307 REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND;
2308}
2309
2310static eio_req *
2311eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
2312{
2313 REQ (type); PATH;
2314
2315 req->flags |= EIO_FLAG_PTR2_FREE;
2316 req->ptr2 = strdup (new_path);
2317 if (!req->ptr2)
2318 {
2319 eio_api_destroy (req);
2320 return 0;
2321 }
2322
2323 SEND;
2324}
2325
2326eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
2327{
2328 return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
2329}
2330
2331eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
2332{
2333 return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
2334}
2335
2336eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
2337{
2338 return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
2339}
2340
2341eio_req *eio_slurp (const char *path, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
2342{
2343 REQ (EIO_SLURP); PATH; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
2344}
2345
2346eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data)
2347{
2348 REQ (EIO_CUSTOM); req->feed = execute; SEND;
2349}
2350
2351#endif
2352
2353eio_req *eio_grp (eio_cb cb, void *data)
2354{
2355 const int pri = EIO_PRI_MAX;
2356
2357 REQ (EIO_GROUP); SEND;
2358}
2359
2360#undef REQ
2361#undef PATH
2362#undef SEND
2363
2364/*****************************************************************************/
2365/* grp functions */
1171 2366
1172void 2367void
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) 2368eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1420{ 2369{
1421 grp->int2 = limit; 2370 grp->int2 = limit;
1422 grp->feed = feed; 2371 grp->feed = feed;
1423 2372
1424 grp_try_feed (grp); 2373 grp_try_feed (grp);
1425} 2374}
1426 2375
2376void
1427void eio_grp_limit (eio_req *grp, int limit) 2377eio_grp_limit (eio_req *grp, int limit)
1428{ 2378{
1429 grp->int2 = limit; 2379 grp->int2 = limit;
1430 2380
1431 grp_try_feed (grp); 2381 grp_try_feed (grp);
1432} 2382}
1433 2383
2384void
1434void eio_grp_add (eio_req *grp, eio_req *req) 2385eio_grp_add (eio_req *grp, eio_req *req)
1435{ 2386{
1436 assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2)); 2387 assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
2388
2389 grp->flags |= ETP_FLAG_GROUPADD;
1437 2390
1438 ++grp->size; 2391 ++grp->size;
1439 req->grp = grp; 2392 req->grp = grp;
1440 2393
1441 req->grp_prev = 0; 2394 req->grp_prev = 0;
… …
1445 grp->grp_first->grp_prev = req; 2398 grp->grp_first->grp_prev = req;
1446 2399
1447 grp->grp_first = req; 2400 grp->grp_first = req;
1448} 2401}
1449 2402
2403/*****************************************************************************/
2404/* misc garbage */
1450 2405
2406eio_ssize_t
2407eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
2408{
2409 return eio__sendfile (ofd, ifd, offset, count);
2410}
2411

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