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Comparing libeio/eio.c (file contents):
Revision 1.8 by root, Sun May 11 20:08:37 2008 UTC vs.
Revision 1.141 by root, Tue Feb 23 19:47:44 2016 UTC

		1	/*
		2	* libeio implementation
		3	*
		4	* Copyright (c) 2007,2008,2009,2010,2011,2012,2013,2016 Marc Alexander Lehmann <libeio@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without modifica-
		8	* tion, are permitted provided that the following conditions are met:
		9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*
		28	* Alternatively, the contents of this file may be used under the terms of
		29	* the GNU General Public License ("GPL") version 2 or any later version,
		30	* in which case the provisions of the GPL are applicable instead of
		31	* the above. If you wish to allow the use of your version of this file
		32	* only under the terms of the GPL and not to allow others to use your
		33	* version of this file under the BSD license, indicate your decision
		34	* by deleting the provisions above and replace them with the notice
		35	* and other provisions required by the GPL. If you do not delete the
		36	* provisions above, a recipient may use your version of this file under
		37	* either the BSD or the GPL.
		38	*/
		39
		40	#ifndef _WIN32
		41	# include "config.h"
		42	#endif
		43
1	#include "eio.h"	44	#include "eio.h"
		45	#include "ecb.h"
		46
		47	#ifdef EIO_STACKSIZE
		48	# define X_STACKSIZE EIO_STACKSIZE
		49	#endif
2	#include "xthread.h"	50	#include "xthread.h"
3		51
4	#include <errno.h>	52	#include <errno.h>
5	#include <stddef.h>	53	#include <stddef.h>
6	#include <stdlib.h>	54	#include <stdlib.h>
…		…
10	#include <sys/stat.h>	58	#include <sys/stat.h>
11	#include <limits.h>	59	#include <limits.h>
12	#include <fcntl.h>	60	#include <fcntl.h>
13	#include <assert.h>	61	#include <assert.h>
14		62
		63	/* intptr_t comes from unistd.h, says POSIX/UNIX/tradition */
		64	/* intptr_t only comes from stdint.h, says idiot openbsd coder */
		65	#if HAVE_STDINT_H
		66	# include <stdint.h>
		67	#endif
		68
		69	#ifndef ECANCELED
		70	# define ECANCELED EDOM
		71	#endif
		72	#ifndef ELOOP
		73	# define ELOOP EDOM
		74	#endif
		75
		76	#if !defined(ENOTSOCK) && defined(WSAENOTSOCK)
		77	# define ENOTSOCK WSAENOTSOCK
		78	#endif
		79
		80	static void eio_destroy (eio_req *req);
		81
15	#ifndef EIO_FINISH	82	#ifndef EIO_FINISH
16	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0	83	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
17	#endif	84	#endif
18		85
19	#ifndef EIO_DESTROY	86	#ifndef EIO_DESTROY
…		…
22		89
23	#ifndef EIO_FEED	90	#ifndef EIO_FEED
24	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)	91	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)
25	#endif	92	#endif
26		93
		94	#ifndef EIO_FD_TO_WIN32_HANDLE
		95	# define EIO_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		96	#endif
		97	#ifndef EIO_WIN32_HANDLE_TO_FD
		98	# define EIO_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		99	#endif
		100
		101	#define EIO_ERRNO(errval,retval) ((errno = errval), retval)
		102
		103	#define EIO_ENOSYS() EIO_ERRNO (ENOSYS, -1)
		104
27	#ifdef _WIN32	105	#ifdef _WIN32
28		106
29	/*doh*/	107	#undef PAGESIZE
		108	#define PAGESIZE 4096 /* GetSystemInfo? */
		109
		110	/* TODO: look at how perl does stat (non-sloppy), unlink (ro-files), utime, link */
		111
		112	#ifdef EIO_STRUCT_STATI64
		113	/* look at perl's non-sloppy stat */
		114	#define stat(path,buf) _stati64 (path,buf)
		115	#define fstat(fd,buf) _fstati64 (fd,buf)
		116	#endif
		117	#define lstat(path,buf) stat (path,buf)
		118	#define fsync(fd) (FlushFileBuffers ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1))
		119	#define mkdir(path,mode) _mkdir (path)
		120	#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))
		121
		122	#define chmod(path,mode) _chmod (path, mode)
		123	#define dup(fd) _dup (fd)
		124	#define dup2(fd1,fd2) _dup2 (fd1, fd2)
		125	#define pipe(fds) _pipe (fds, 4096, O_BINARY)
		126
		127	#define fcntl(fd,cmd,arg) EIO_ENOSYS ()
		128	#define ioctl(fd,cmd,arg) EIO_ENOSYS ()
		129	#define fchmod(fd,mode) EIO_ENOSYS ()
		130	#define chown(path,uid,gid) EIO_ENOSYS ()
		131	#define fchown(fd,uid,gid) EIO_ENOSYS ()
		132	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
		133	#define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */
		134	#define mknod(path,mode,dev) EIO_ENOSYS ()
		135	#define sync() EIO_ENOSYS ()
		136	#define readlink(path,buf,s) EIO_ENOSYS ()
		137	#define statvfs(path,buf) EIO_ENOSYS ()
		138	#define fstatvfs(fd,buf) EIO_ENOSYS ()
		139
		140	#define pread(fd,buf,count,offset) eio__pread (fd, buf, count, offset)
		141	#define pwrite(fd,buf,count,offset) eio__pwrite (fd, buf, count, offset)
		142
		143	#if __GNUC__
		144	typedef long long eio_off_t; /* signed for compatibility to msvc */
		145	#else
		146	typedef __int64 eio_off_t; /* unsigned not supported by msvc */
		147	#endif
		148
		149	static eio_ssize_t
		150	eio__pread (int fd, void *buf, eio_ssize_t count, eio_off_t offset)
		151	{
		152	OVERLAPPED o = { 0 };
		153	DWORD got;
		154
		155	o.Offset = offset;
		156	o.OffsetHigh = offset >> 32;
		157
		158	return ReadFile ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd), buf, count, &got, &o)
		159	? got : -1;
		160	}
		161
		162	static eio_ssize_t
		163	eio__pwrite (int fd, void *buf, eio_ssize_t count, eio_off_t offset)
		164	{
		165	OVERLAPPED o = { 0 };
		166	DWORD got;
		167
		168	o.Offset = offset;
		169	o.OffsetHigh = offset >> 32;
		170
		171	return WriteFile ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd), buf, count, &got, &o)
		172	? got : -1;
		173	}
		174
		175	/* rename() uses MoveFile, which fails to overwrite */
		176	#define rename(old,neu) eio__rename (old, neu)
		177
		178	static int
		179	eio__rename (const char *old, const char *neu)
		180	{
		181	if (MoveFileEx (old, neu, MOVEFILE_REPLACE_EXISTING))
		182	return 0;
		183
		184	/* should steal _dosmaperr */
		185	switch (GetLastError ())
		186	{
		187	case ERROR_FILE_NOT_FOUND:
		188	case ERROR_PATH_NOT_FOUND:
		189	case ERROR_INVALID_DRIVE:
		190	case ERROR_NO_MORE_FILES:
		191	case ERROR_BAD_NETPATH:
		192	case ERROR_BAD_NET_NAME:
		193	case ERROR_BAD_PATHNAME:
		194	case ERROR_FILENAME_EXCED_RANGE:
		195	errno = ENOENT;
		196	break;
		197
		198	default:
		199	errno = EACCES;
		200	break;
		201	}
		202
		203	return -1;
		204	}
		205
		206	/* we could even stat and see if it exists */
		207	static int
		208	symlink (const char *old, const char *neu)
		209	{
		210	#if WINVER >= 0x0600
		211	if (CreateSymbolicLink (neu, old, 1))
		212	return 0;
		213
		214	if (CreateSymbolicLink (neu, old, 0))
		215	return 0;
		216	#endif
		217
		218	return EIO_ERRNO (ENOENT, -1);
		219	}
		220
		221	/* POSIX API only, causing trouble for win32 apps */
		222	#define CreateHardLink(neu,old,flags) 0 /* not really creating hardlink, still using relative paths? */
		223	#define CreateSymbolicLink(neu,old,flags) 0 /* vista+ only */
		224
		225	struct statvfs
		226	{
		227	int dummy;
		228	};
		229
		230	#define DT_DIR EIO_DT_DIR
		231	#define DT_REG EIO_DT_REG
		232	#define D_NAME(entp) entp.cFileName
		233	#define D_TYPE(entp) (entp.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ? DT_DIR : DT_REG)
30		234
31	#else	235	#else
32		236
33	# include "config.h"
34	# include <sys/time.h>	237	#include <sys/time.h>
35	# include <sys/select.h>	238	#include <sys/select.h>
36	# include <unistd.h>	239	#include <unistd.h>
		240	#include <signal.h>
		241	#include <dirent.h>
		242
		243	#ifdef ANDROID
		244	#include <sys/vfs.h>
		245	#define statvfs statfs
		246	#define fstatvfs fstatfs
		247	#include <asm/page.h> /* supposedly limits.h does #define PAGESIZE PAGESIZE */
		248	#else
		249	#include <sys/statvfs.h>
		250	#endif
		251
		252	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		253	#include <sys/mman.h>
		254	#endif
		255
		256	#define D_NAME(entp) entp->d_name
		257
		258	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
		259	#if __FreeBSD__ || __NetBSD__ || __OpenBSD__
		260	#define _DIRENT_HAVE_D_TYPE /* sigh */
		261	#define D_INO(de) (de)->d_fileno
		262	#define D_NAMLEN(de) (de)->d_namlen
		263	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
		264	#define D_INO(de) (de)->d_ino
		265	#endif
		266
		267	#ifdef _D_EXACT_NAMLEN
		268	#undef D_NAMLEN
		269	#define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
		270	#endif
		271
		272	#ifdef _DIRENT_HAVE_D_TYPE
		273	#define D_TYPE(de) (de)->d_type
		274	#endif
		275
		276	#ifndef EIO_STRUCT_DIRENT
		277	#define EIO_STRUCT_DIRENT struct dirent
		278	#endif
		279
		280	#endif
		281
		282	#if HAVE_UTIMES
37	# include <utime.h>	283	# include <utime.h>
38	# include <signal.h>
39	# include <dirent.h>
40
41	# ifndef EIO_STRUCT_DIRENT
42	# define EIO_STRUCT_DIRENT struct dirent
43	# endif	284	#endif
44		285
45	#endif	286	#if HAVE_SYS_SYSCALL_H
46		287	# include <sys/syscall.h>
47	# ifndef EIO_STRUCT_STAT
48	# define EIO_STRUCT_STAT struct stat
49	# endif	288	#endif
		289
		290	#if HAVE_SYS_PRCTL_H
		291	# include <sys/prctl.h>
		292	#endif
50		293
51	#if HAVE_SENDFILE	294	#if HAVE_SENDFILE
52	# if __linux	295	# if __linux
53	# include <sys/sendfile.h>	296	# include <sys/sendfile.h>
54	# elif __freebsd	297	# elif __FreeBSD__ || defined __APPLE__
55	# include <sys/socket.h>	298	# include <sys/socket.h>
56	# include <sys/uio.h>	299	# include <sys/uio.h>
57	# elif __hpux	300	# elif __hpux
58	# include <sys/socket.h>	301	# include <sys/socket.h>
59	# elif __solaris /* not yet */	302	# elif __solaris
60	# include <sys/sendfile.h>	303	# include <sys/sendfile.h>
61	# else	304	# else
62	# error sendfile support requested but not available	305	# error sendfile support requested but not available
63	# endif	306	# endif
64	#endif	307	#endif
65		308
66	/* number of seconds after which an idle threads exit */	309	#ifndef D_TYPE
67	#define IDLE_TIMEOUT 10	310	# define D_TYPE(de) 0
		311	#endif
		312	#ifndef D_INO
		313	# define D_INO(de) 0
		314	#endif
		315	#ifndef D_NAMLEN
		316	# define D_NAMLEN(entp) strlen (D_NAME (entp))
		317	#endif
68		318
69	/* used for struct dirent, AIX doesn't provide it */	319	/* used for struct dirent, AIX doesn't provide it */
70	#ifndef NAME_MAX	320	#ifndef NAME_MAX
71	# define NAME_MAX 4096	321	# define NAME_MAX 4096
72	#endif	322	#endif
73		323
		324	/* used for readlink etc. */
		325	#ifndef PATH_MAX
		326	# define PATH_MAX 4096
		327	#endif
		328
74	/* buffer size for various temporary buffers */	329	/* buffer size for various temporary buffers */
75	#define EIO_BUFSIZE 65536	330	#define EIO_BUFSIZE 65536
76		331
77	#define dBUF \	332	#define dBUF \
78	char *eio_buf; \
79	X_LOCK (wrklock); \
80	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	333	char *eio_buf = malloc (EIO_BUFSIZE); \
81	X_UNLOCK (wrklock); \	334	errno = ENOMEM; \
82	if (!eio_buf) \	335	if (!eio_buf) \
83	return -1;	336	return -1
84		337
85	#define EIO_TICKS ((1000000 + 1023) >> 10)	338	#define FUBd \
		339	free (eio_buf)
86		340
87	static void (*want_poll_cb) (void);	341	/*****************************************************************************/
88	static void (*done_poll_cb) (void);
89		342
90	static unsigned int max_poll_time = 0;	343	struct etp_tmpbuf;
91	static unsigned int max_poll_reqs = 0;
92		344
93	/* calculcate time difference in ~1/EIO_TICKS of a second */	345	#if _POSIX_VERSION >= 200809L
94	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	346	#define HAVE_AT 1
95	{	347	#define WD2FD(wd) ((wd) ? (wd)->fd : AT_FDCWD)
96	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	348	#ifndef O_SEARCH
97	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);	349	#define O_SEARCH O_RDONLY
98	}	350	#endif
		351	#else
		352	#define HAVE_AT 0
		353	static const char *wd_expand (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path);
		354	#endif
99		355
100	static unsigned int started, idle, wanted;	356	struct eio_pwd
101
102	/* worker threads management */
103	static mutex_t wrklock = X_MUTEX_INIT;
104
105	typedef struct worker {
106	/* locked by wrklock */
107	struct worker *prev, *next;
108
109	thread_t tid;
110
111	/* locked by reslock, reqlock or wrklock */
112	eio_req *req; /* currently processed request */
113	void *dbuf;
114	DIR *dirp;
115	} worker;
116
117	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
118
119	static void worker_clear (worker *wrk)
120	{	357	{
121	if (wrk->dirp)	358	#if HAVE_AT
122	{	359	int fd;
123	closedir (wrk->dirp);	360	#endif
124	wrk->dirp = 0;
125	}
126
127	if (wrk->dbuf)
128	{
129	free (wrk->dbuf);
130	wrk->dbuf = 0;
131	}
132	}
133
134	static void worker_free (worker *wrk)
135	{
136	wrk->next->prev = wrk->prev;
137	wrk->prev->next = wrk->next;
138
139	free (wrk);
140	}
141
142	static volatile unsigned int nreqs, nready, npending;
143	static volatile unsigned int max_idle = 4;
144
145	static mutex_t reslock = X_MUTEX_INIT;
146	static mutex_t reqlock = X_MUTEX_INIT;
147	static cond_t reqwait = X_COND_INIT;
148
149	unsigned int eio_nreqs (void)
150	{
151	return nreqs;
152	}
153
154	unsigned int eio_nready (void)
155	{
156	unsigned int retval;
157
158	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
159	retval = nready;
160	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
161
162	return retval;
163	}
164
165	unsigned int eio_npending (void)
166	{
167	unsigned int retval;
168
169	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
170	retval = npending;
171	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
172
173	return retval;
174	}
175
176	unsigned int eio_nthreads (void)
177	{
178	unsigned int retval;
179
180	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
181	retval = started;
182	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
183
184	return retval;
185	}
186
187	/*
188	* a somewhat faster data structure might be nice, but
189	* with 8 priorities this actually needs <20 insns
190	* per shift, the most expensive operation.
191	*/
192	typedef struct {
193	eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */
194	int size;	361	int len;
195	} reqq;	362	char str[1]; /* actually, a 0-terminated canonical path */
		363	};
196		364
197	static reqq req_queue;	365	/*****************************************************************************/
198	static reqq res_queue;
199		366
200	static int reqq_push (reqq *q, eio_req *req)	367	#define ETP_PRI_MIN EIO_PRI_MIN
201	{	368	#define ETP_PRI_MAX EIO_PRI_MAX
202	int pri = req->pri;
203	req->next = 0;
204		369
205	if (q->qe[pri])	370	#define ETP_TYPE_QUIT -1
206	{	371	#define ETP_TYPE_GROUP EIO_GROUP
207	q->qe[pri]->next = req;
208	q->qe[pri] = req;
209	}
210	else
211	q->qe[pri] = q->qs[pri] = req;
212		372
213	return q->size++;	373	static void eio_nop_callback (void) { }
214	}	374	static void (*eio_want_poll_cb)(void) = eio_nop_callback;
		375	static void (*eio_done_poll_cb)(void) = eio_nop_callback;
215		376
216	static eio_req *reqq_shift (reqq *q)	377	#define ETP_WANT_POLL(pool) eio_want_poll_cb ()
217	{	378	#define ETP_DONE_POLL(pool) eio_done_poll_cb ()
218	int pri;
219		379
220	if (!q->size)	380	struct etp_worker;
221	return 0;	381	#define ETP_REQ eio_req
		382	#define ETP_DESTROY(req) eio_destroy (req)
		383	static int eio_finish (eio_req *req);
		384	#define ETP_FINISH(req) eio_finish (req)
		385	static void eio_execute (struct etp_worker *self, eio_req *req);
		386	#define ETP_EXECUTE(wrk,req) eio_execute (wrk, req)
222		387
223	--q->size;	388	#include "etp.c"
224		389
225	for (pri = EIO_NUM_PRI; pri--; )	390	static struct etp_pool eio_pool;
226	{	391	#define EIO_POOL (&eio_pool)
227	eio_req *req = q->qs[pri];
228		392
229	if (req)	393	/*****************************************************************************/
230	{
231	if (!(q->qs[pri] = (eio_req *)req->next))
232	q->qe[pri] = 0;
233		394
234	return req;	395	static void
235	}
236	}
237
238	abort ();
239	}
240
241	static void grp_try_feed (eio_req *grp)	396	grp_try_feed (eio_req *grp)
242	{	397	{
243	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	398	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
244	{	399	{
245	int old_len = grp->size;	400	grp->flags &= ~ETP_FLAG_GROUPADD;
246		401
247	EIO_FEED (grp);	402	EIO_FEED (grp);
248		403
249	/* stop if no progress has been made */	404	/* stop if no progress has been made */
250	if (old_len == grp->size)	405	if (!(grp->flags & ETP_FLAG_GROUPADD))
251	{	406	{
252	grp->feed = 0;	407	grp->feed = 0;
253	break;	408	break;
254	}	409	}
255	}	410	}
256	}	411	}
257		412
258	static int eio_finish (eio_req *req);	413	static int
259
260	static int grp_dec (eio_req *grp)	414	grp_dec (eio_req *grp)
261	{	415	{
262	--grp->size;	416	--grp->size;
263		417
264	/* call feeder, if applicable */	418	/* call feeder, if applicable */
265	grp_try_feed (grp);	419	grp_try_feed (grp);
266		420
267	/* finish, if done */	421	/* finish, if done */
268	if (!grp->size && grp->int1)	422	if (!grp->size && grp->flags & ETP_FLAG_DELAYED)
269	return eio_finish (grp);	423	return eio_finish (grp);
270	else	424	else
271	return 0;	425	return 0;
272	}	426	}
273		427
		428	static void
274	void eio_destroy (eio_req *req)	429	eio_destroy (eio_req *req)
275	{	430	{
276	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);	431	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
277	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);	432	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
278		433
279	EIO_DESTROY (req);	434	EIO_DESTROY (req);
280	}	435	}
281		436
		437	static int
282	static int eio_finish (eio_req *req)	438	eio_finish (eio_req *req)
283	{	439	{
284	int res = EIO_FINISH (req);	440	int res = EIO_FINISH (req);
285		441
286	if (req->grp)	442	if (req->grp)
287	{	443	{
…		…
295	if (grp->grp_first == req)	451	if (grp->grp_first == req)
296	grp->grp_first = req->grp_next;	452	grp->grp_first = req->grp_next;
297		453
298	res2 = grp_dec (grp);	454	res2 = grp_dec (grp);
299		455
300	if (!res && res2)	456	if (!res)
301	res = res2;	457	res = res2;
302	}	458	}
303		459
304	eio_destroy (req);	460	eio_destroy (req);
305		461
306	return res;	462	return res;
307	}	463	}
308		464
		465	void
309	void eio_grp_cancel (eio_req *grp)	466	eio_grp_cancel (eio_req *grp)
310	{	467	{
311	for (grp = grp->grp_first; grp; grp = grp->grp_next)	468	etp_grp_cancel (EIO_POOL, grp);
312	eio_cancel (grp);
313	}	469	}
314		470
		471	void
315	void eio_cancel (eio_req *req)	472	eio_cancel (eio_req *req)
316	{	473	{
317	X_LOCK (wrklock);	474	etp_cancel (EIO_POOL, req);
318	req->flags |= EIO_FLAG_CANCELLED;
319	X_UNLOCK (wrklock);
320
321	eio_grp_cancel (req);
322	}	475	}
323		476
324	X_THREAD_PROC (eio_proc);	477	void
325
326	static void start_thread (void)
327	{
328	worker *wrk = calloc (1, sizeof (worker));
329
330	/*TODO*/
331	assert (("unable to allocate worker thread data", !wrk));
332
333	X_LOCK (wrklock);
334
335	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))
336	{
337	wrk->prev = &wrk_first;
338	wrk->next = wrk_first.next;
339	wrk_first.next->prev = wrk;
340	wrk_first.next = wrk;
341	++started;
342	}
343	else
344	free (wrk);
345
346	X_UNLOCK (wrklock);
347	}
348
349	static void maybe_start_thread (void)
350	{
351	if (eio_nthreads () >= wanted)
352	return;
353
354	/* todo: maybe use idle here, but might be less exact */
355	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())
356	return;
357
358	start_thread ();
359	}
360
361	void eio_submit (eio_req *req)	478	eio_submit (eio_req *req)
362	{	479	{
363	++nreqs;	480	etp_submit (EIO_POOL, req);
364
365	X_LOCK (reqlock);
366	++nready;
367	reqq_push (&req_queue, req);
368	X_COND_SIGNAL (reqwait);
369	X_UNLOCK (reqlock);
370
371	maybe_start_thread ();
372	}	481	}
373		482
374	static void end_thread (void)	483	unsigned int
		484	eio_nreqs (void)
375	{	485	{
376	eio_req *req = calloc (1, sizeof (eio_req));	486	return etp_nreqs (EIO_POOL);
377
378	req->type = EIO_QUIT;
379	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;
380
381	X_LOCK (reqlock);
382	reqq_push (&req_queue, req);
383	X_COND_SIGNAL (reqwait);
384	X_UNLOCK (reqlock);
385
386	X_LOCK (wrklock);
387	--started;
388	X_UNLOCK (wrklock);
389	}	487	}
390		488
		489	unsigned int
		490	eio_nready (void)
		491	{
		492	return etp_nready (EIO_POOL);
		493	}
		494
		495	unsigned int
		496	eio_npending (void)
		497	{
		498	return etp_npending (EIO_POOL);
		499	}
		500
		501	unsigned int ecb_cold
		502	eio_nthreads (void)
		503	{
		504	return etp_nthreads (EIO_POOL);
		505	}
		506
		507	void ecb_cold
391	void eio_set_max_poll_time (double nseconds)	508	eio_set_max_poll_time (double nseconds)
392	{	509	{
393	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	510	etp_set_max_poll_time (EIO_POOL, nseconds);
394	max_poll_time = nseconds;
395	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
396	}	511	}
397		512
		513	void ecb_cold
398	void eio_set_max_poll_reqs (unsigned int maxreqs)	514	eio_set_max_poll_reqs (unsigned int maxreqs)
399	{	515	{
400	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	516	etp_set_max_poll_reqs (EIO_POOL, maxreqs);
401	max_poll_reqs = maxreqs;
402	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
403	}	517	}
404		518
		519	void ecb_cold
405	void eio_set_max_idle (unsigned int nthreads)	520	eio_set_max_idle (unsigned int nthreads)
406	{	521	{
407	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	522	etp_set_max_idle (EIO_POOL, nthreads);
408	max_idle = nthreads <= 0 ? 1 : nthreads;
409	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
410	}	523	}
411		524
		525	void ecb_cold
		526	eio_set_idle_timeout (unsigned int seconds)
		527	{
		528	etp_set_idle_timeout (EIO_POOL, seconds);
		529	}
		530
		531	void ecb_cold
412	void eio_set_min_parallel (unsigned int nthreads)	532	eio_set_min_parallel (unsigned int nthreads)
413	{	533	{
414	if (wanted < nthreads)	534	etp_set_min_parallel (EIO_POOL, nthreads);
415	wanted = nthreads;
416	}	535	}
417		536
		537	void ecb_cold
418	void eio_set_max_parallel (unsigned int nthreads)	538	eio_set_max_parallel (unsigned int nthreads)
419	{	539	{
420	if (wanted > nthreads)	540	etp_set_max_parallel (EIO_POOL, nthreads);
421	wanted = nthreads;
422
423	while (started > wanted)
424	end_thread ();
425	}	541	}
426		542
427	int eio_poll (void)	543	int eio_poll (void)
428	{	544	{
429	int maxreqs = max_poll_reqs;	545	return etp_poll (EIO_POOL);
430	struct timeval tv_start, tv_now;
431	eio_req *req;
432
433	if (max_poll_time)
434	gettimeofday (&tv_start, 0);
435
436	for (;;)
437	{
438	maybe_start_thread ();
439
440	X_LOCK (reslock);
441	req = reqq_shift (&res_queue);
442
443	if (req)
444	{
445	--npending;
446
447	if (!res_queue.size && done_poll_cb)
448	done_poll_cb ();
449	}
450
451	X_UNLOCK (reslock);
452
453	if (!req)
454	return 0;
455
456	--nreqs;
457
458	if (req->type == EIO_GROUP && req->size)
459	{
460	req->int1 = 1; /* mark request as delayed */
461	continue;
462	}
463	else
464	{
465	int res = eio_finish (req);
466	if (res)
467	return res;
468	}
469
470	if (maxreqs && !--maxreqs)
471	break;
472
473	if (max_poll_time)
474	{
475	gettimeofday (&tv_now, 0);
476
477	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
478	break;
479	}
480	}
481
482	errno = EAGAIN;
483	return -1;
484	}	546	}
485		547
486	/*****************************************************************************/	548	/*****************************************************************************/
487	/* work around various missing functions */	549	/* work around various missing functions */
488		550
489	#if !HAVE_PREADWRITE
490	# define pread aio_pread
491	# define pwrite aio_pwrite
492
493	/*
494	* make our pread/pwrite safe against themselves, but not against
495	* normal read/write by using a mutex. slows down execution a lot,
496	* but that's your problem, not mine.
497	*/
498	static mutex_t preadwritelock = X_MUTEX_INIT;
499
500	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
501	{
502	ssize_t res;
503	off_t ooffset;
504
505	X_LOCK (preadwritelock);
506	ooffset = lseek (fd, 0, SEEK_CUR);
507	lseek (fd, offset, SEEK_SET);
508	res = read (fd, buf, count);
509	lseek (fd, ooffset, SEEK_SET);
510	X_UNLOCK (preadwritelock);
511
512	return res;
513	}
514
515	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
516	{
517	ssize_t res;
518	off_t ooffset;
519
520	X_LOCK (preadwritelock);
521	ooffset = lseek (fd, 0, SEEK_CUR);
522	lseek (fd, offset, SEEK_SET);
523	res = write (fd, buf, count);
524	lseek (fd, offset, SEEK_SET);
525	X_UNLOCK (preadwritelock);
526
527	return res;
528	}
529	#endif
530
531	#ifndef HAVE_FUTIMES	551	#ifndef HAVE_UTIMES
532		552
		553	# undef utimes
533	# define utimes(path,times) aio_utimes (path, times)	554	# define utimes(path,times) eio__utimes (path, times)
534	# define futimes(fd,times) aio_futimes (fd, times)
535		555
		556	static int
536	static int aio_utimes (const char *filename, const struct timeval times[2])	557	eio__utimes (const char *filename, const struct timeval times[2])
537	{	558	{
538	if (times)	559	if (times)
539	{	560	{
540	struct utimbuf buf;	561	struct utimbuf buf;
541		562
…		…
546	}	567	}
547	else	568	else
548	return utime (filename, 0);	569	return utime (filename, 0);
549	}	570	}
550		571
		572	#endif
		573
		574	#ifndef HAVE_FUTIMES
		575
		576	# undef futimes
		577	# define futimes(fd,times) eio__futimes (fd, times)
		578
		579	static int
551	static int aio_futimes (int fd, const struct timeval tv[2])	580	eio__futimes (int fd, const struct timeval tv[2])
552	{	581	{
553	errno = ENOSYS;	582	errno = ENOSYS;
554	return -1;	583	return -1;
555	}	584	}
556		585
557	#endif	586	#endif
558		587
559	#if !HAVE_FDATASYNC	588	#if !HAVE_FDATASYNC
		589	# undef fdatasync
560	# define fdatasync fsync	590	# define fdatasync(fd) fsync (fd)
561	#endif	591	#endif
		592
		593	static int
		594	eio__syncfs (int fd)
		595	{
		596	int res;
		597
		598	#if HAVE_SYS_SYNCFS
		599	res = (int)syscall (__NR_syncfs, (int)(fd));
		600	#else
		601	res = EIO_ENOSYS ();
		602	#endif
		603
		604	if (res < 0 && errno == ENOSYS && fd >= 0)
		605	sync ();
		606
		607	return res;
		608	}
		609
		610	/* sync_file_range always needs emulation */
		611	static int
		612	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
		613	{
		614	#if HAVE_SYNC_FILE_RANGE
		615	int res;
		616
		617	if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE
		618	|| EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE
		619	|| EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER)
		620	{
		621	flags = 0
		622	| (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0)
		623	| (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0)
		624	| (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0);
		625	}
		626
		627	res = sync_file_range (fd, offset, nbytes, flags);
		628
		629	if (!res || errno != ENOSYS)
		630	return res;
		631	#endif
		632
		633	/* even though we could play tricks with the flags, it's better to always
		634	* call fdatasync, as that matches the expectation of its users best */
		635	return fdatasync (fd);
		636	}
		637
		638	static int
		639	eio__fallocate (int fd, int mode, off_t offset, size_t len)
		640	{
		641	#if HAVE_LINUX_FALLOCATE
		642	return fallocate (fd, mode, offset, len);
		643	#else
		644	return EIO_ENOSYS ();
		645	#endif
		646	}
562		647
563	#if !HAVE_READAHEAD	648	#if !HAVE_READAHEAD
		649	# undef readahead
564	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	650	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
565		651
		652	static eio_ssize_t
566	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)	653	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
567	{	654	{
568	size_t todo = count;	655	size_t todo = count;
569	dBUF;	656	dBUF;
570		657
571	while (todo > 0)	658	while (todo > 0)
…		…
575	pread (fd, eio_buf, len, offset);	662	pread (fd, eio_buf, len, offset);
576	offset += len;	663	offset += len;
577	todo -= len;	664	todo -= len;
578	}	665	}
579		666
580	errno = 0;	667	FUBd;
		668
		669	/* linux's readahead basically only fails for EBADF or EINVAL (not mmappable) */
		670	/* but not for e.g. EIO or eof, so we also never fail */
581	return count;	671	return 0;
582	}	672	}
583		673
584	#endif
585
586	#if !HAVE_READDIR_R
587	# define readdir_r aio_readdir_r
588
589	static mutex_t readdirlock = X_MUTEX_INIT;
590
591	static int readdir_r (DIR *dirp, EIO_STRUCT_DIRENT *ent, EIO_STRUCT_DIRENT **res)
592	{
593	EIO_STRUCT_DIRENT *e;
594	int errorno;
595
596	X_LOCK (readdirlock);
597
598	e = readdir (dirp);
599	errorno = errno;
600
601	if (e)
602	{
603	*res = ent;
604	strcpy (ent->d_name, e->d_name);
605	}
606	else
607	*res = 0;
608
609	X_UNLOCK (readdirlock);
610
611	errno = errorno;
612	return e ? 0 : -1;
613	}
614	#endif	674	#endif
615		675
616	/* sendfile always needs emulation */	676	/* sendfile always needs emulation */
		677	static eio_ssize_t
617	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)	678	eio__sendfile (int ofd, int ifd, off_t offset, size_t count)
618	{	679	{
		680	eio_ssize_t written = 0;
619	ssize_t res;	681	eio_ssize_t res;
620		682
621	if (!count)	683	if (!count)
622	return 0;	684	return 0;
623		685
		686	for (;;)
		687	{
		688	#ifdef __APPLE__
		689	# undef HAVE_SENDFILE /* broken, as everything on os x */
		690	#endif
624	#if HAVE_SENDFILE	691	#if HAVE_SENDFILE
625	# if __linux	692	# if __linux
		693	off_t soffset = offset;
626	res = sendfile (ofd, ifd, &offset, count);	694	res = sendfile (ofd, ifd, &soffset, count);
627		695
628	# elif __freebsd	696	# elif __FreeBSD__
629	/*	697	/*
630	* Of course, the freebsd sendfile is a dire hack with no thoughts	698	* Of course, the freebsd sendfile is a dire hack with no thoughts
631	* wasted on making it similar to other I/O functions.	699	* wasted on making it similar to other I/O functions.
632	*/	700	*/
633	{
634	off_t sbytes;	701	off_t sbytes;
635	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	702	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
636		703
637	if (res < 0 && sbytes)	704	#if 0 /* according to the manpage, this is correct, but broken behaviour */
638	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */	705	/* freebsd' sendfile will return 0 on success */
		706	/* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */
		707	/* not on e.g. EIO or EPIPE - sounds broken */
		708	if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0)
639	res = sbytes;	709	res = sbytes;
640	}	710	#endif
		711
		712	/* according to source inspection, this is correct, and useful behaviour */
		713	if (sbytes)
		714	res = sbytes;
		715
		716	# elif defined __APPLE__
		717	off_t sbytes = count;
		718	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
		719
		720	/* according to the manpage, sbytes is always valid */
		721	if (sbytes)
		722	res = sbytes;
641		723
642	# elif __hpux	724	# elif __hpux
643	res = sendfile (ofd, ifd, offset, count, 0, 0);	725	res = sendfile (ofd, ifd, offset, count, 0, 0);
644		726
645	# elif __solaris	727	# elif __solaris
646	{
647	struct sendfilevec vec;	728	struct sendfilevec vec;
648	size_t sbytes;	729	size_t sbytes;
649		730
650	vec.sfv_fd = ifd;	731	vec.sfv_fd = ifd;
651	vec.sfv_flag = 0;	732	vec.sfv_flag = 0;
652	vec.sfv_off = offset;	733	vec.sfv_off = offset;
653	vec.sfv_len = count;	734	vec.sfv_len = count;
654		735
655	res = sendfilev (ofd, &vec, 1, &sbytes);	736	res = sendfilev (ofd, &vec, 1, &sbytes);
656		737
657	if (res < 0 && sbytes)	738	if (res < 0 && sbytes)
658	res = sbytes;	739	res = sbytes;
659	}
660		740
661	# endif	741	# endif
		742
		743	#elif defined (_WIN32) && 0
		744	/* does not work, just for documentation of what would need to be done */
		745	/* actually, cannot be done like this, as TransmitFile changes the file offset, */
		746	/* libeio guarantees that the file offset does not change, and windows */
		747	/* has no way to get an independent handle to the same file description */
		748	HANDLE h = TO_SOCKET (ifd);
		749	SetFilePointer (h, offset, 0, FILE_BEGIN);
		750	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
		751
662	#else	752	#else
663	res = -1;	753	res = EIO_ENOSYS ();
664	errno = ENOSYS;
665	#endif	754	#endif
666		755
		756	/* we assume sendfile can copy at least 128mb in one go */
		757	if (res <= 128 * 1024 * 1024)
		758	{
		759	if (res > 0)
		760	written += res;
		761
		762	if (written)
		763	return written;
		764
		765	break;
		766	}
		767	else
		768	{
		769	/* if we requested more, then probably the kernel was lazy */
		770	written += res;
		771	offset += res;
		772	count -= res;
		773
		774	if (!count)
		775	return written;
		776	}
		777	}
		778
667	if (res < 0	779	if (res < 0
668	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	780	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		781	/* BSDs */
		782	#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */
		783	|| errno == ENOTSUP
		784	#endif
		785	#ifdef EOPNOTSUPP /* windows */
		786	|| errno == EOPNOTSUPP /* BSDs */
		787	#endif
669	#if __solaris	788	#if __solaris
670	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	789	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
671	#endif	790	#endif
672	)	791	)
673	)	792	)
…		…
677		796
678	res = 0;	797	res = 0;
679		798
680	while (count)	799	while (count)
681	{	800	{
682	ssize_t cnt;	801	eio_ssize_t cnt;
683		802
684	cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);	803	cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);
685		804
686	if (cnt <= 0)	805	if (cnt <= 0)
687	{	806	{
…		…
699		818
700	offset += cnt;	819	offset += cnt;
701	res += cnt;	820	res += cnt;
702	count -= cnt;	821	count -= cnt;
703	}	822	}
		823
		824	FUBd;
704	}	825	}
705		826
706	return res;	827	return res;
707	}	828	}
708		829
709	/* read a full directory */	830	#ifdef PAGESIZE
710	static void scandir_ (eio_req *req, worker *self)	831	# define eio_pagesize() PAGESIZE
		832	#else
		833	static intptr_t
		834	eio_pagesize (void)
711	{	835	{
712	DIR *dirp;	836	static intptr_t page;
713	union
714	{
715	EIO_STRUCT_DIRENT d;
716	char b [offsetof (EIO_STRUCT_DIRENT, d_name) + NAME_MAX + 1];
717	} *u;
718	EIO_STRUCT_DIRENT *entp;
719	char *name, *names;
720	int memlen = 4096;
721	int memofs = 0;
722	int res = 0;
723		837
724	X_LOCK (wrklock);	838	if (!page)
725	self->dirp = dirp = opendir (req->ptr1);	839	page = sysconf (_SC_PAGESIZE);
726	self->dbuf = u = malloc (sizeof (*u));
727	req->flags |= EIO_FLAG_PTR2_FREE;
728	req->ptr2 = names = malloc (memlen);
729	X_UNLOCK (wrklock);
730		840
731	if (dirp && u && names)	841	return page;
732	for (;;)	842	}
		843	#endif
		844
		845	static void
		846	eio_page_align (void **addr, size_t *length)
		847	{
		848	intptr_t mask = eio_pagesize () - 1;
		849
		850	/* round down addr */
		851	intptr_t adj = mask & (intptr_t)*addr;
		852
		853	*addr = (void *)((intptr_t)*addr - adj);
		854	*length += adj;
		855
		856	/* round up length */
		857	*length = (*length + mask) & ~mask;
		858	}
		859
		860	#if !_POSIX_MEMLOCK
		861	# define eio__mlockall(a) EIO_ENOSYS ()
		862	#else
		863
		864	static int
		865	eio__mlockall (int flags)
		866	{
		867	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		868	extern int mallopt (int, int);
		869	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		870	#endif
		871
		872	if (EIO_MCL_CURRENT != MCL_CURRENT
		873	|| EIO_MCL_FUTURE != MCL_FUTURE)
		874	{
		875	flags = 0
		876	| (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0)
		877	| (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0);
		878	}
		879
		880	return mlockall (flags);
		881	}
		882	#endif
		883
		884	#if !_POSIX_MEMLOCK_RANGE
		885	# define eio__mlock(a,b) EIO_ENOSYS ()
		886	#else
		887
		888	static int
		889	eio__mlock (void *addr, size_t length)
		890	{
		891	eio_page_align (&addr, &length);
		892
		893	return mlock (addr, length);
		894	}
		895
		896	#endif
		897
		898	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
		899	# define eio__msync(a,b,c) EIO_ENOSYS ()
		900	#else
		901
		902	static int
		903	eio__msync (void *mem, size_t len, int flags)
		904	{
		905	eio_page_align (&mem, &len);
		906
		907	if (EIO_MS_ASYNC != MS_SYNC
		908	|| EIO_MS_INVALIDATE != MS_INVALIDATE
		909	|| EIO_MS_SYNC != MS_SYNC)
		910	{
		911	flags = 0
		912	| (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
		913	| (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
		914	| (flags & EIO_MS_SYNC ? MS_SYNC : 0);
		915	}
		916
		917	return msync (mem, len, flags);
		918	}
		919
		920	#endif
		921
		922	static int
		923	eio__mtouch (eio_req *req)
		924	{
		925	void *mem = req->ptr2;
		926	size_t len = req->size;
		927	int flags = req->int1;
		928
		929	eio_page_align (&mem, &len);
		930
		931	{
		932	intptr_t addr = (intptr_t)mem;
		933	intptr_t end = addr + len;
		934	intptr_t page = eio_pagesize ();
		935
		936	if (addr < end)
		937	if (flags & EIO_MT_MODIFY) /* modify */
		938	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req));
		939	else
		940	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req));
		941	}
		942
		943	return 0;
		944	}
		945
		946	/*****************************************************************************/
		947	/* requests implemented outside eio_execute, because they are so large */
		948
		949	static void
		950	eio__lseek (eio_req *req)
		951	{
		952	/* this usually gets optimised away completely, or your compiler sucks, */
		953	/* or the whence constants really are not 0, 1, 2 */
		954	int whence = req->int2 == EIO_SEEK_SET ? SEEK_SET
		955	: req->int2 == EIO_SEEK_CUR ? SEEK_CUR
		956	: req->int2 == EIO_SEEK_END ? SEEK_END
		957	: req->int2;
		958
		959	req->offs = lseek (req->int1, req->offs, whence);
		960	req->result = req->offs == (off_t)-1 ? -1 : 0;
		961	}
		962
		963	/* result will always end up in tmpbuf, there is always space for adding a 0-byte */
		964	static int
		965	eio__realpath (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path)
		966	{
		967	char *res;
		968	const char *rel = path;
		969	char *tmp1, *tmp2;
		970	#if SYMLOOP_MAX > 32
		971	int symlinks = SYMLOOP_MAX;
		972	#else
		973	int symlinks = 32;
		974	#endif
		975
		976	errno = EINVAL;
		977	if (!rel)
		978	return -1;
		979
		980	errno = ENOENT;
		981	if (!*rel)
		982	return -1;
		983
		984	res = etp_tmpbuf_get (tmpbuf, PATH_MAX * 3);
		985	#ifdef _WIN32
		986	if (_access (rel, 4) != 0)
		987	return -1;
		988
		989	symlinks = GetFullPathName (rel, PATH_MAX * 3, res, 0);
		990
		991	errno = ENAMETOOLONG;
		992	if (symlinks >= PATH_MAX * 3)
		993	return -1;
		994
		995	errno = EIO;
		996	if (symlinks <= 0)
		997	return -1;
		998
		999	return symlinks;
		1000
		1001	#else
		1002	tmp1 = res + PATH_MAX;
		1003	tmp2 = tmp1 + PATH_MAX;
		1004
		1005	#if 0 /* disabled, the musl way to do things is just too racy */
		1006	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
		1007	/* on linux we may be able to ask the kernel */
		1008	{
		1009	int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME);
		1010
		1011	if (fd >= 0)
733	{	1012	{
		1013	sprintf (tmp1, "/proc/self/fd/%d", fd);
		1014	req->result = readlink (tmp1, res, PATH_MAX);
		1015	/* here we should probably stat the open file and the disk file, to make sure they still match */
		1016	close (fd);
		1017
		1018	if (req->result > 0)
		1019	goto done;
		1020	}
		1021	else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)
		1022	return -1;
		1023	}
		1024	#endif
		1025	#endif
		1026
		1027	if (*rel != '/')
		1028	{
		1029	int len;
		1030
734	errno = 0;	1031	errno = ENOENT;
735	readdir_r (dirp, &u->d, &entp);	1032	if (wd == EIO_INVALID_WD)
		1033	return -1;
		1034
		1035	if (wd == EIO_CWD)
		1036	{
		1037	if (!getcwd (res, PATH_MAX))
		1038	return -1;
736		1039
737	if (!entp)	1040	len = strlen (res);
		1041	}
		1042	else
		1043	memcpy (res, wd->str, len = wd->len);
		1044
		1045	if (res [1]) /* only use if not / */
		1046	res += len;
		1047	}
		1048
		1049	while (*rel)
		1050	{
		1051	eio_ssize_t len, linklen;
		1052	const char *beg = rel;
		1053
		1054	while (*rel && *rel != '/')
		1055	++rel;
		1056
		1057	len = rel - beg;
		1058
		1059	if (!len) /* skip slashes */
		1060	{
738	break;	1061	++rel;
		1062	continue;
		1063	}
739		1064
740	name = entp->d_name;	1065	if (beg [0] == '.')
		1066	{
		1067	if (len == 1)
		1068	continue; /* . - nop */
741		1069
742	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	1070	if (beg [1] == '.' && len == 2)
		1071	{
		1072	/* .. - back up one component, if possible */
		1073
		1074	while (res != tmpbuf->ptr)
		1075	if (*--res == '/')
		1076	break;
		1077
		1078	continue;
		1079	}
		1080	}
		1081
		1082	errno = ENAMETOOLONG;
		1083	if (res + 1 + len + 1 >= tmp1)
		1084	return -1;
		1085
		1086	/* copy one component */
		1087	*res = '/';
		1088	memcpy (res + 1, beg, len);
		1089
		1090	/* zero-terminate, for readlink */
		1091	res [len + 1] = 0;
		1092
		1093	/* now check if it's a symlink */
		1094	linklen = readlink (tmpbuf->ptr, tmp1, PATH_MAX);
		1095
		1096	if (linklen < 0)
743	{	1097	{
		1098	if (errno != EINVAL)
		1099	return -1;
		1100
		1101	/* it's a normal directory. hopefully */
		1102	res += len + 1;
		1103	}
		1104	else
		1105	{
		1106	/* yay, it was a symlink - build new path in tmp2 */
744	int len = strlen (name) + 1;	1107	int rellen = strlen (rel);
745		1108
		1109	errno = ENAMETOOLONG;
		1110	if (linklen + 1 + rellen >= PATH_MAX)
		1111	return -1;
		1112
		1113	errno = ELOOP;
		1114	if (!--symlinks)
		1115	return -1;
		1116
		1117	if (*tmp1 == '/')
		1118	res = tmpbuf->ptr; /* symlink resolves to an absolute path */
		1119
		1120	/* we need to be careful, as rel might point into tmp2 already */
		1121	memmove (tmp2 + linklen + 1, rel, rellen + 1);
		1122	tmp2 [linklen] = '/';
		1123	memcpy (tmp2, tmp1, linklen);
		1124
		1125	rel = tmp2;
		1126	}
		1127	}
		1128
		1129	/* special case for the lone root path */
		1130	if (res == tmpbuf->ptr)
		1131	*res++ = '/';
		1132
		1133	return res - (char *)tmpbuf->ptr;
		1134	#endif
		1135	}
		1136
		1137	static signed char
		1138	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
		1139	{
		1140	return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */
		1141	: a->inode < b->inode ? -1
		1142	: a->inode > b->inode ? 1
		1143	: 0;
		1144	}
		1145
		1146	#define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0
		1147
		1148	#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */
		1149	#define EIO_SORT_FAST 60 /* when to only use insertion sort */
		1150
		1151	static void
		1152	eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits)
		1153	{
		1154	unsigned char bits [9 + sizeof (eio_ino_t) * 8];
		1155	unsigned char *bit = bits;
		1156
		1157	assert (CHAR_BIT == 8);
		1158	assert (sizeof (eio_dirent) * 8 < 256);
		1159	assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */
		1160	assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */
		1161
		1162	if (size <= EIO_SORT_FAST)
		1163	return;
		1164
		1165	/* first prepare an array of bits to test in our radix sort */
		1166	/* try to take endianness into account, as well as differences in eio_ino_t sizes */
		1167	/* inode_bits must contain all inodes ORed together */
		1168	/* which is used to skip bits that are 0 everywhere, which is very common */
		1169	{
		1170	eio_ino_t endianness;
		1171	int i, j;
		1172
		1173	/* we store the byte offset of byte n into byte n of "endianness" */
		1174	for (i = 0; i < sizeof (eio_ino_t); ++i)
		1175	((unsigned char *)&endianness)[i] = i;
		1176
		1177	*bit++ = 0;
		1178
		1179	for (i = 0; i < sizeof (eio_ino_t); ++i)
		1180	{
		1181	/* shifting off the byte offsets out of "endianness" */
		1182	int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8;
		1183	endianness >>= 8;
		1184
		1185	for (j = 0; j < 8; ++j)
		1186	if (inode_bits & (((eio_ino_t)1) << (i * 8 + j)))
		1187	*bit++ = offs + j;
		1188	}
		1189
		1190	for (j = 0; j < 8; ++j)
		1191	if (score_bits & (1 << j))
		1192	*bit++ = offsetof (eio_dirent, score) * 8 + j;
		1193	}
		1194
		1195	/* now actually do the sorting (a variant of MSD radix sort) */
		1196	{
		1197	eio_dirent *base_stk [9 + sizeof (eio_ino_t) * 8], *base;
		1198	eio_dirent *end_stk [9 + sizeof (eio_ino_t) * 8], *end;
		1199	unsigned char *bit_stk [9 + sizeof (eio_ino_t) * 8];
		1200	int stk_idx = 0;
		1201
		1202	base_stk [stk_idx] = dents;
		1203	end_stk [stk_idx] = dents + size;
		1204	bit_stk [stk_idx] = bit - 1;
		1205
		1206	do
		1207	{
		1208	base = base_stk [stk_idx];
		1209	end = end_stk [stk_idx];
		1210	bit = bit_stk [stk_idx];
		1211
		1212	for (;;)
		1213	{
		1214	unsigned char O = *bit >> 3;
		1215	unsigned char M = 1 << (*bit & 7);
		1216
		1217	eio_dirent *a = base;
		1218	eio_dirent *b = end;
		1219
		1220	if (b - a < EIO_SORT_CUTOFF)
746	res++;	1221	break;
747		1222
748	while (memofs + len > memlen)	1223	/* now bit-partition the array on the bit */
		1224	/* this ugly asymmetric loop seems to perform much better than typical */
		1225	/* partition algos found in the literature */
		1226	do
		1227	if (!(((unsigned char *)a)[O] & M))
		1228	++a;
		1229	else if (!(((unsigned char *)--b)[O] & M))
749	{	1230	{
750	memlen *= 2;	1231	eio_dirent tmp = *a; *a = *b; *b = tmp;
751	X_LOCK (wrklock);
752	req->ptr2 = names = realloc (names, memlen);
753	X_UNLOCK (wrklock);
754
755	if (!names)
756	break;	1232	++a;
757	}	1233	}
		1234	while (b > a);
758		1235
759	memcpy (names + memofs, name, len);	1236	/* next bit, or stop, if no bits left in this path */
760	memofs += len;	1237	if (!*--bit)
		1238	break;
		1239
		1240	base_stk [stk_idx] = a;
		1241	end_stk [stk_idx] = end;
		1242	bit_stk [stk_idx] = bit;
		1243	++stk_idx;
		1244
		1245	end = a;
761	}	1246	}
762	}	1247	}
763		1248	while (stk_idx--);
764	if (errno)
765	res = -1;
766		1249	}
		1250	}
		1251
		1252	static void
		1253	eio_dent_insertion_sort (eio_dirent *dents, int size)
		1254	{
		1255	/* first move the smallest element to the front, to act as a sentinel */
		1256	{
		1257	int i;
		1258	eio_dirent *min = dents;
		1259
		1260	/* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */
		1261	for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; )
		1262	if (EIO_DENT_CMP (dents [i], <, *min))
		1263	min = &dents [i];
		1264
		1265	/* swap elements 0 and j (minimum) */
		1266	{
		1267	eio_dirent tmp = *dents; *dents = *min; *min = tmp;
		1268	}
		1269	}
		1270
		1271	/* then do standard insertion sort, assuming that all elements are >= dents [0] */
		1272	{
		1273	eio_dirent *i, *j;
		1274
		1275	for (i = dents + 1; i < dents + size; ++i)
		1276	{
		1277	eio_dirent value = *i;
		1278
		1279	for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j)
		1280	j [1] = j [0];
		1281
		1282	j [1] = value;
		1283	}
		1284	}
		1285	}
		1286
		1287	static void
		1288	eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits)
		1289	{
		1290	if (size <= 1)
		1291	return; /* our insertion sort relies on size > 0 */
		1292
		1293	/* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */
		1294	/* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */
		1295	eio_dent_radix_sort (dents, size, score_bits, inode_bits);
		1296
		1297	/* use an insertion sort at the end, or for small arrays, */
		1298	/* as insertion sort is more efficient for small partitions */
		1299	eio_dent_insertion_sort (dents, size);
		1300	}
		1301
		1302	/* read a full directory */
		1303	static void
		1304	eio__scandir (eio_req *req, etp_worker *self)
		1305	{
		1306	char *name, *names;
		1307	int namesalloc = 4096 - sizeof (void *) * 4;
		1308	int namesoffs = 0;
		1309	int flags = req->int1;
		1310	eio_dirent *dents = 0;
		1311	int dentalloc = 128;
		1312	int dentoffs = 0;
		1313	eio_ino_t inode_bits = 0;
		1314	#ifdef _WIN32
		1315	HANDLE dirp;
		1316	WIN32_FIND_DATA entp;
		1317	#else
		1318	DIR *dirp;
		1319	EIO_STRUCT_DIRENT *entp;
		1320	#endif
		1321
767	req->result = res;	1322	req->result = -1;
		1323
		1324	if (!(flags & EIO_READDIR_DENTS))
		1325	flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
		1326
		1327	#ifdef _WIN32
		1328	{
		1329	int len = strlen ((const char *)req->ptr1);
		1330	char *path = malloc (MAX_PATH);
		1331	const char *fmt;
		1332	const char *reqpath = wd_expand (&self->tmpbuf, req->wd, req->ptr1);
		1333
		1334	if (!len)
		1335	fmt = "./*";
		1336	else if (reqpath[len - 1] == '/' || reqpath[len - 1] == '\\')
		1337	fmt = "%s*";
		1338	else
		1339	fmt = "%s/*";
		1340
		1341	_snprintf (path, MAX_PATH, fmt, reqpath);
		1342	dirp = FindFirstFile (path, &entp);
		1343	free (path);
		1344
		1345	if (dirp == INVALID_HANDLE_VALUE)
		1346	{
		1347	/* should steal _dosmaperr */
		1348	switch (GetLastError ())
		1349	{
		1350	case ERROR_FILE_NOT_FOUND:
		1351	req->result = 0;
		1352	break;
		1353
		1354	case ERROR_INVALID_NAME:
		1355	case ERROR_PATH_NOT_FOUND:
		1356	case ERROR_NO_MORE_FILES:
		1357	errno = ENOENT;
		1358	break;
		1359
		1360	case ERROR_NOT_ENOUGH_MEMORY:
		1361	errno = ENOMEM;
		1362	break;
		1363
		1364	default:
		1365	errno = EINVAL;
		1366	break;
		1367	}
		1368
		1369	return;
		1370	}
		1371	}
		1372	#else
		1373	#if HAVE_AT
		1374	if (req->wd)
		1375	{
		1376	int fd = openat (WD2FD (req->wd), req->ptr1, O_CLOEXEC | O_SEARCH | O_DIRECTORY);
		1377
		1378	if (fd < 0)
		1379	return;
		1380
		1381	dirp = fdopendir (fd);
		1382
		1383	if (!dirp)
		1384	close (fd);
		1385	}
		1386	else
		1387	dirp = opendir (req->ptr1);
		1388	#else
		1389	dirp = opendir (wd_expand (&self->tmpbuf, req->wd, req->ptr1));
		1390	#endif
		1391
		1392	if (!dirp)
		1393	return;
		1394	#endif
		1395
		1396	if (req->flags & EIO_FLAG_PTR1_FREE)
		1397	free (req->ptr1);
		1398
		1399	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
		1400	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
		1401	req->ptr2 = names = malloc (namesalloc);
		1402
		1403	if (!names || (flags && !dents))
		1404	return;
		1405
		1406	for (;;)
		1407	{
		1408	int done;
		1409
		1410	#ifdef _WIN32
		1411	done = !dirp;
		1412	#else
		1413	errno = 0;
		1414	entp = readdir (dirp);
		1415	done = !entp;
		1416	#endif
		1417
		1418	if (done)
		1419	{
		1420	#ifndef _WIN32
		1421	int old_errno = errno;
		1422	closedir (dirp);
		1423	errno = old_errno;
		1424
		1425	if (errno)
		1426	break;
		1427	#endif
		1428
		1429	/* sort etc. */
		1430	req->int1 = flags;
		1431	req->result = dentoffs;
		1432
		1433	if (flags & EIO_READDIR_STAT_ORDER)
		1434	eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits);
		1435	else if (flags & EIO_READDIR_DIRS_FIRST)
		1436	if (flags & EIO_READDIR_FOUND_UNKNOWN)
		1437	eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */
		1438	else
		1439	{
		1440	/* in this case, all is known, and we just put dirs first and sort them */
		1441	eio_dirent *oth = dents + dentoffs;
		1442	eio_dirent *dir = dents;
		1443
		1444	/* now partition dirs to the front, and non-dirs to the back */
		1445	/* by walking from both sides and swapping if necessary */
		1446	while (oth > dir)
		1447	{
		1448	if (dir->type == EIO_DT_DIR)
		1449	++dir;
		1450	else if ((--oth)->type == EIO_DT_DIR)
		1451	{
		1452	eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
		1453
		1454	++dir;
		1455	}
		1456	}
		1457
		1458	/* now sort the dirs only (dirs all have the same score) */
		1459	eio_dent_sort (dents, dir - dents, 0, inode_bits);
		1460	}
		1461
		1462	break;
		1463	}
		1464
		1465	/* now add the entry to our list(s) */
		1466	name = D_NAME (entp);
		1467
		1468	/* skip . and .. entries */
		1469	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1470	{
		1471	int len = D_NAMLEN (entp) + 1;
		1472
		1473	while (ecb_expect_false (namesoffs + len > namesalloc))
		1474	{
		1475	namesalloc *= 2;
		1476	req->ptr2 = names = realloc (names, namesalloc);
		1477
		1478	if (!names)
		1479	break;
		1480	}
		1481
		1482	memcpy (names + namesoffs, name, len);
		1483
		1484	if (dents)
		1485	{
		1486	struct eio_dirent *ent;
		1487
		1488	if (ecb_expect_false (dentoffs == dentalloc))
		1489	{
		1490	dentalloc *= 2;
		1491	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
		1492
		1493	if (!dents)
		1494	break;
		1495	}
		1496
		1497	ent = dents + dentoffs;
		1498
		1499	ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
		1500	ent->namelen = len - 1;
		1501	ent->inode = D_INO (entp);
		1502
		1503	inode_bits |= ent->inode;
		1504
		1505	switch (D_TYPE (entp))
		1506	{
		1507	default:
		1508	ent->type = EIO_DT_UNKNOWN;
		1509	flags |= EIO_READDIR_FOUND_UNKNOWN;
		1510	break;
		1511
		1512	#ifdef DT_FIFO
		1513	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
		1514	#endif
		1515	#ifdef DT_CHR
		1516	case DT_CHR: ent->type = EIO_DT_CHR; break;
		1517	#endif
		1518	#ifdef DT_MPC
		1519	case DT_MPC: ent->type = EIO_DT_MPC; break;
		1520	#endif
		1521	#ifdef DT_DIR
		1522	case DT_DIR: ent->type = EIO_DT_DIR; break;
		1523	#endif
		1524	#ifdef DT_NAM
		1525	case DT_NAM: ent->type = EIO_DT_NAM; break;
		1526	#endif
		1527	#ifdef DT_BLK
		1528	case DT_BLK: ent->type = EIO_DT_BLK; break;
		1529	#endif
		1530	#ifdef DT_MPB
		1531	case DT_MPB: ent->type = EIO_DT_MPB; break;
		1532	#endif
		1533	#ifdef DT_REG
		1534	case DT_REG: ent->type = EIO_DT_REG; break;
		1535	#endif
		1536	#ifdef DT_NWK
		1537	case DT_NWK: ent->type = EIO_DT_NWK; break;
		1538	#endif
		1539	#ifdef DT_CMP
		1540	case DT_CMP: ent->type = EIO_DT_CMP; break;
		1541	#endif
		1542	#ifdef DT_LNK
		1543	case DT_LNK: ent->type = EIO_DT_LNK; break;
		1544	#endif
		1545	#ifdef DT_SOCK
		1546	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
		1547	#endif
		1548	#ifdef DT_DOOR
		1549	case DT_DOOR: ent->type = EIO_DT_DOOR; break;
		1550	#endif
		1551	#ifdef DT_WHT
		1552	case DT_WHT: ent->type = EIO_DT_WHT; break;
		1553	#endif
		1554	}
		1555
		1556	ent->score = 7;
		1557
		1558	if (flags & EIO_READDIR_DIRS_FIRST)
		1559	{
		1560	if (ent->type == EIO_DT_UNKNOWN)
		1561	{
		1562	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
		1563	ent->score = 1;
		1564	else if (!strchr (name, '.')) /* absence of dots indicate likely dirs */
		1565	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
		1566	}
		1567	else if (ent->type == EIO_DT_DIR)
		1568	ent->score = 0;
		1569	}
		1570	}
		1571
		1572	namesoffs += len;
		1573	++dentoffs;
		1574	}
		1575
		1576	if (EIO_CANCELLED (req))
		1577	{
		1578	errno = ECANCELED;
		1579	break;
		1580	}
		1581
		1582	#ifdef _WIN32
		1583	if (!FindNextFile (dirp, &entp))
		1584	{
		1585	FindClose (dirp);
		1586	dirp = 0;
		1587	}
		1588	#endif
		1589	}
768	}	1590	}
		1591
		1592	/*****************************************************************************/
		1593	/* working directory stuff */
		1594	/* various deficiencies in the posix 2008 api force us to */
		1595	/* keep the absolute path in string form at all times */
		1596	/* fuck yeah. */
		1597
		1598	#if !HAVE_AT
		1599
		1600	/* a bit like realpath, but usually faster because it doesn'T have to return */
		1601	/* an absolute or canonical path */
		1602	static const char *
		1603	wd_expand (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path)
		1604	{
		1605	if (!wd || *path == '/')
		1606	return path;
		1607
		1608	if (path [0] == '.' && !path [1])
		1609	return wd->str;
		1610
		1611	{
		1612	int l1 = wd->len;
		1613	int l2 = strlen (path);
		1614
		1615	char *res = etp_tmpbuf_get (tmpbuf, l1 + l2 + 2);
		1616
		1617	memcpy (res, wd->str, l1);
		1618	res [l1] = '/';
		1619	memcpy (res + l1 + 1, path, l2 + 1);
		1620
		1621	return res;
		1622	}
		1623	}
		1624
		1625	#endif
		1626
		1627	static eio_wd
		1628	eio__wd_open_sync (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path)
		1629	{
		1630	int fd;
		1631	eio_wd res;
		1632	int len = eio__realpath (tmpbuf, wd, path);
		1633
		1634	if (len < 0)
		1635	return EIO_INVALID_WD;
		1636
		1637	#if HAVE_AT
		1638	fd = openat (WD2FD (wd), path, O_CLOEXEC | O_SEARCH | O_DIRECTORY);
		1639
		1640	if (fd < 0)
		1641	return EIO_INVALID_WD;
		1642	#endif
		1643
		1644	res = malloc (sizeof (*res) + len); /* one extra 0-byte */
		1645
		1646	#if HAVE_AT
		1647	res->fd = fd;
		1648	#endif
		1649
		1650	res->len = len;
		1651	memcpy (res->str, tmpbuf->ptr, len);
		1652	res->str [len] = 0;
		1653
		1654	return res;
		1655	}
		1656
		1657	eio_wd
		1658	eio_wd_open_sync (eio_wd wd, const char *path)
		1659	{
		1660	struct etp_tmpbuf tmpbuf = { };
		1661	wd = eio__wd_open_sync (&tmpbuf, wd, path);
		1662	free (tmpbuf.ptr);
		1663
		1664	return wd;
		1665	}
		1666
		1667	void
		1668	eio_wd_close_sync (eio_wd wd)
		1669	{
		1670	if (wd != EIO_INVALID_WD && wd != EIO_CWD)
		1671	{
		1672	#if HAVE_AT
		1673	close (wd->fd);
		1674	#endif
		1675	free (wd);
		1676	}
		1677	}
		1678
		1679	#if HAVE_AT
		1680
		1681	/* they forgot these */
		1682
		1683	static int
		1684	eio__truncateat (int dirfd, const char *path, off_t length)
		1685	{
		1686	int fd = openat (dirfd, path, O_WRONLY | O_CLOEXEC);
		1687	int res;
		1688
		1689	if (fd < 0)
		1690	return fd;
		1691
		1692	res = ftruncate (fd, length);
		1693	close (fd);
		1694	return res;
		1695	}
		1696
		1697	static int
		1698	eio__statvfsat (int dirfd, const char *path, struct statvfs *buf)
		1699	{
		1700	int fd = openat (dirfd, path, O_SEARCH | O_CLOEXEC);
		1701	int res;
		1702
		1703	if (fd < 0)
		1704	return fd;
		1705
		1706	res = fstatvfs (fd, buf);
		1707	close (fd);
		1708	return res;
		1709
		1710	}
		1711
		1712	#endif
769		1713
770	/*****************************************************************************/	1714	/*****************************************************************************/
771		1715
772	#define ALLOC(len) \	1716	#define ALLOC(len) \
773	if (!req->ptr2) \	1717	if (!req->ptr2) \
774	{ \	1718	{ \
775	X_LOCK (wrklock); \	1719	X_LOCK (EIO_POOL->wrklock); \
776	req->flags |= EIO_FLAG_PTR2_FREE; \	1720	req->flags |= EIO_FLAG_PTR2_FREE; \
777	X_UNLOCK (wrklock); \	1721	X_UNLOCK (EIO_POOL->wrklock); \
778	req->ptr2 = malloc (len); \	1722	req->ptr2 = malloc (len); \
779	if (!req->ptr2) \	1723	if (!req->ptr2) \
780	{ \	1724	{ \
781	errno = ENOMEM; \	1725	errno = ENOMEM; \
782	req->result = -1; \	1726	req->result = -1; \
783	break; \	1727	break; \
784	} \	1728	} \
785	}	1729	}
786		1730
787	X_THREAD_PROC (eio_proc)
788	{
789	eio_req *req;
790	struct timespec ts;
791	worker *self = (worker *)thr_arg;
792
793	/* try to distribute timeouts somewhat randomly */
794	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
795
796	for (;;)
797	{
798	ts.tv_sec = time (0) + IDLE_TIMEOUT;
799
800	X_LOCK (reqlock);
801
802	for (;;)
803	{
804	self->req = req = reqq_shift (&req_queue);
805
806	if (req)
807	break;
808
809	++idle;
810
811	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
812	{
813	if (idle > max_idle)
814	{
815	--idle;
816	X_UNLOCK (reqlock);
817	X_LOCK (wrklock);
818	--started;
819	X_UNLOCK (wrklock);
820	goto quit;
821	}
822
823	/* we are allowed to idle, so do so without any timeout */
824	X_COND_WAIT (reqwait, reqlock);
825	ts.tv_sec = time (0) + IDLE_TIMEOUT;
826	}
827
828	--idle;
829	}
830
831	--nready;
832
833	X_UNLOCK (reqlock);
834
835	errno = 0; /* strictly unnecessary */
836
837	if (!EIO_CANCELLED (req))
838	switch (req->type)
839	{
840	case EIO_READ: ALLOC (req->size);
841	req->result = req->offs >= 0
842	? pread (req->int1, req->ptr2, req->size, req->offs)
843	: read (req->int1, req->ptr2, req->size); break;
844	case EIO_WRITE: req->result = req->offs >= 0
845	? pwrite (req->int1, req->ptr2, req->size, req->offs)
846	: write (req->int1, req->ptr2, req->size); break;
847
848	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
849	case EIO_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
850
851	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
852	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
853	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
854	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
855	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
856	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
857
858	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
859	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
860	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
861	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
862	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
863	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
864
865	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
866	case EIO_CLOSE: req->result = close (req->int1); break;
867	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
868	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
869	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
870	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
871	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
872	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
873	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
874	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
875
876	case EIO_READLINK: ALLOC (NAME_MAX);
877	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
878
879	case EIO_SYNC: req->result = 0; sync (); break;
880	case EIO_FSYNC: req->result = fsync (req->int1); break;
881	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
882
883	case EIO_READDIR: scandir_ (req, self); break;
884
885	case EIO_BUSY:
886	#ifdef _WIN32
887	Sleep (req->nv1 * 1000.);
888	#else
889	{
890	struct timeval tv;
891
892	tv.tv_sec = req->nv1;
893	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
894
895	req->result = select (0, 0, 0, 0, &tv);
896	}
897	#endif
898	break;
899
900	case EIO_UTIME:
901	case EIO_FUTIME:
902	{
903	struct timeval tv[2];
904	struct timeval *times;
905
906	if (req->nv1 != -1. || req->nv2 != -1.)
907	{
908	tv[0].tv_sec = req->nv1;
909	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
910	tv[1].tv_sec = req->nv2;
911	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
912
913	times = tv;
914	}
915	else
916	times = 0;
917
918
919	req->result = req->type == EIO_FUTIME
920	? futimes (req->int1, times)
921	: utimes (req->ptr1, times);
922	}
923
924	case EIO_GROUP:
925	case EIO_NOP:
926	break;
927
928	case EIO_QUIT:
929	goto quit;
930
931	default:
932	req->result = -1;
933	break;
934	}
935
936	req->errorno = errno;
937
938	X_LOCK (reslock);
939
940	++npending;
941
942	if (!reqq_push (&res_queue, req) && want_poll_cb)
943	want_poll_cb ();
944
945	self->req = 0;
946	worker_clear (self);
947
948	X_UNLOCK (reslock);
949	}
950
951	quit:
952	X_LOCK (wrklock);
953	worker_free (self);
954	X_UNLOCK (wrklock);
955
956	return 0;
957	}
958
959	/*****************************************************************************/	1731	/*****************************************************************************/
960		1732
961	static void eio_atfork_prepare (void)	1733	int ecb_cold
962	{
963	X_LOCK (wrklock);
964	X_LOCK (reqlock);
965	X_LOCK (reslock);
966	#if !HAVE_PREADWRITE
967	X_LOCK (preadwritelock);
968	#endif
969	#if !HAVE_READDIR_R
970	X_LOCK (readdirlock);
971	#endif
972	}
973
974	static void eio_atfork_parent (void)
975	{
976	#if !HAVE_READDIR_R
977	X_UNLOCK (readdirlock);
978	#endif
979	#if !HAVE_PREADWRITE
980	X_UNLOCK (preadwritelock);
981	#endif
982	X_UNLOCK (reslock);
983	X_UNLOCK (reqlock);
984	X_UNLOCK (wrklock);
985	}
986
987	static void eio_atfork_child (void)
988	{
989	eio_req *prv;
990
991	while (prv = reqq_shift (&req_queue))
992	eio_destroy (prv);
993
994	while (prv = reqq_shift (&res_queue))
995	eio_destroy (prv);
996
997	while (wrk_first.next != &wrk_first)
998	{
999	worker *wrk = wrk_first.next;
1000
1001	if (wrk->req)
1002	eio_destroy (wrk->req);
1003
1004	worker_clear (wrk);
1005	worker_free (wrk);
1006	}
1007
1008	started = 0;
1009	idle = 0;
1010	nreqs = 0;
1011	nready = 0;
1012	npending = 0;
1013
1014	eio_atfork_parent ();
1015	}
1016
1017	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	1734	eio_init (void (*want_poll)(void), void (*done_poll)(void))
1018	{	1735	{
1019	want_poll_cb = want_poll;	1736	eio_want_poll_cb = want_poll;
1020	done_poll_cb = done_poll;	1737	eio_done_poll_cb = done_poll;
1021		1738
1022	#ifdef _WIN32	1739	return etp_init (EIO_POOL, 0, 0, 0);
1023	X_MUTEX_CHECK (wrklock);
1024	X_MUTEX_CHECK (reslock);
1025	X_MUTEX_CHECK (reqlock);
1026	X_MUTEX_CHECK (reqwait);
1027	X_MUTEX_CHECK (preadwritelock);
1028	X_MUTEX_CHECK (readdirlock);
1029
1030	X_COND_CHECK (reqwait);
1031	#endif
1032
1033	X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);
1034	}	1740	}
1035		1741
		1742	ecb_inline void
1036	static void eio_api_destroy (eio_req *req)	1743	eio_api_destroy (eio_req *req)
1037	{	1744	{
1038	free (req);	1745	free (req);
1039	}	1746	}
1040		1747
1041	#define REQ(rtype) \	1748	#define REQ(rtype) \
1042	eio_req *req; \	1749	eio_req *req; \
1043	\	1750	\
1044	req = (eio_req *)calloc (1, sizeof *req); \	1751	req = (eio_req *)calloc (1, sizeof *req); \
1045	if (!req) \	1752	if (!req) \
1046	return 0; \	1753	return 0; \
1047	\	1754	\
1048	req->type = EIO_ ## rtype; \	1755	req->type = rtype; \
1049	req->pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \	1756	req->pri = pri; \
1050	req->finish = cb; \	1757	req->finish = cb; \
		1758	req->data = data; \
1051	req->destroy = eio_api_destroy;	1759	req->destroy = eio_api_destroy;
1052		1760
1053	#define SEND eio_submit (req); return req	1761	#define SEND eio_submit (req); return req
1054		1762
1055	#define PATH (void)0	1763	#define PATH \
		1764	req->flags |= EIO_FLAG_PTR1_FREE; \
		1765	req->ptr1 = strdup (path); \
		1766	if (!req->ptr1) \
		1767	{ \
		1768	eio_api_destroy (req); \
		1769	return 0; \
		1770	}
1056		1771
		1772	#define SINGLEDOT(ptr) (0[(char *)(ptr)] == '.' && !1[(char *)(ptr)])
		1773
		1774	static void
		1775	eio_execute (etp_worker *self, eio_req *req)
		1776	{
		1777	#if HAVE_AT
		1778	int dirfd;
		1779	#else
		1780	const char *path;
		1781	#endif
		1782
		1783	if (ecb_expect_false (EIO_CANCELLED (req)))
		1784	{
		1785	req->result = -1;
		1786	req->errorno = ECANCELED;
		1787	return;
		1788	}
		1789
		1790	if (ecb_expect_false (req->wd == EIO_INVALID_WD))
		1791	{
		1792	req->result = -1;
		1793	req->errorno = ENOENT;
		1794	return;
		1795	}
		1796
		1797	if (req->type >= EIO_OPEN)
		1798	{
		1799	#if HAVE_AT
		1800	dirfd = WD2FD (req->wd);
		1801	#else
		1802	path = wd_expand (&self->tmpbuf, req->wd, req->ptr1);
		1803	#endif
		1804	}
		1805
		1806	switch (req->type)
		1807	{
		1808	case EIO_WD_OPEN: req->wd = eio__wd_open_sync (&self->tmpbuf, req->wd, req->ptr1);
		1809	req->result = req->wd == EIO_INVALID_WD ? -1 : 0;
		1810	break;
		1811	case EIO_WD_CLOSE: req->result = 0;
		1812	eio_wd_close_sync (req->wd); break;
		1813
		1814	case EIO_SEEK: eio__lseek (req); break;
		1815	case EIO_READ: ALLOC (req->size);
		1816	req->result = req->offs >= 0
		1817	? pread (req->int1, req->ptr2, req->size, req->offs)
		1818	: read (req->int1, req->ptr2, req->size); break;
		1819	case EIO_WRITE: req->result = req->offs >= 0
		1820	? pwrite (req->int1, req->ptr2, req->size, req->offs)
		1821	: write (req->int1, req->ptr2, req->size); break;
		1822
		1823	case EIO_FCNTL: req->result = fcntl (req->int1, (int) req->int2, req->ptr2); break;
		1824	case EIO_IOCTL: req->result = ioctl (req->int1, (unsigned long)req->int2, req->ptr2); break;
		1825
		1826	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		1827	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size); break;
		1828
		1829	#if HAVE_AT
		1830
		1831	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1832	req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, 0); break;
		1833	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1834	req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, AT_SYMLINK_NOFOLLOW); break;
		1835	case EIO_CHOWN: req->result = fchownat (dirfd, req->ptr1, req->int2, req->int3, 0); break;
		1836	case EIO_CHMOD: req->result = fchmodat (dirfd, req->ptr1, (mode_t)req->int2, 0); break;
		1837	case EIO_TRUNCATE: req->result = eio__truncateat (dirfd, req->ptr1, req->offs); break;
		1838	case EIO_OPEN: req->result = openat (dirfd, req->ptr1, req->int1, (mode_t)req->int2); break;
		1839
		1840	case EIO_UNLINK: req->result = unlinkat (dirfd, req->ptr1, 0); break;
		1841	case EIO_RMDIR: /* complications arise because "." cannot be removed, so we might have to expand */
		1842	req->result = req->wd && SINGLEDOT (req->ptr1)
		1843	? rmdir (req->wd->str)
		1844	: unlinkat (dirfd, req->ptr1, AT_REMOVEDIR); break;
		1845	case EIO_MKDIR: req->result = mkdirat (dirfd, req->ptr1, (mode_t)req->int2); break;
		1846	case EIO_RENAME: /* complications arise because "." cannot be renamed, so we might have to expand */
		1847	req->result = req->wd && SINGLEDOT (req->ptr1)
		1848	? rename (req->wd->str, req->ptr2)
		1849	: renameat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2); break;
		1850	case EIO_LINK: req->result = linkat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2, 0); break;
		1851	case EIO_SYMLINK: req->result = symlinkat (req->ptr1, dirfd, req->ptr2); break;
		1852	case EIO_MKNOD: req->result = mknodat (dirfd, req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
		1853	case EIO_READLINK: ALLOC (PATH_MAX);
		1854	req->result = readlinkat (dirfd, req->ptr1, req->ptr2, PATH_MAX); break;
		1855	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		1856	req->result = eio__statvfsat (dirfd, req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
		1857	case EIO_UTIME:
		1858	case EIO_FUTIME:
		1859	{
		1860	struct timespec ts[2];
		1861	struct timespec *times;
		1862
		1863	if (req->nv1 != -1. || req->nv2 != -1.)
		1864	{
		1865	ts[0].tv_sec = req->nv1;
		1866	ts[0].tv_nsec = (req->nv1 - ts[0].tv_sec) * 1e9;
		1867	ts[1].tv_sec = req->nv2;
		1868	ts[1].tv_nsec = (req->nv2 - ts[1].tv_sec) * 1e9;
		1869
		1870	times = ts;
		1871	}
		1872	else
		1873	times = 0;
		1874
		1875	req->result = req->type == EIO_FUTIME
		1876	? futimens (req->int1, times)
		1877	: utimensat (dirfd, req->ptr1, times, 0);
		1878	}
		1879	break;
		1880
		1881	#else
		1882
		1883	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1884	req->result = stat (path , (EIO_STRUCT_STAT *)req->ptr2); break;
		1885	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1886	req->result = lstat (path , (EIO_STRUCT_STAT *)req->ptr2); break;
		1887	case EIO_CHOWN: req->result = chown (path , req->int2, req->int3); break;
		1888	case EIO_CHMOD: req->result = chmod (path , (mode_t)req->int2); break;
		1889	case EIO_TRUNCATE: req->result = truncate (path , req->offs); break;
		1890	case EIO_OPEN: req->result = open (path , req->int1, (mode_t)req->int2); break;
		1891
		1892	case EIO_UNLINK: req->result = unlink (path ); break;
		1893	case EIO_RMDIR: req->result = rmdir (path ); break;
		1894	case EIO_MKDIR: req->result = mkdir (path , (mode_t)req->int2); break;
		1895	case EIO_RENAME: req->result = rename (path , req->ptr2); break;
		1896	case EIO_LINK: req->result = link (path , req->ptr2); break;
		1897	case EIO_SYMLINK: req->result = symlink (path , req->ptr2); break;
		1898	case EIO_MKNOD: req->result = mknod (path , (mode_t)req->int2, (dev_t)req->offs); break;
		1899	case EIO_READLINK: ALLOC (PATH_MAX);
		1900	req->result = readlink (path, req->ptr2, PATH_MAX); break;
		1901	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		1902	req->result = statvfs (path , (EIO_STRUCT_STATVFS *)req->ptr2); break;
		1903
		1904	case EIO_UTIME:
		1905	case EIO_FUTIME:
		1906	{
		1907	struct timeval tv[2];
		1908	struct timeval *times;
		1909
		1910	if (req->nv1 != -1. || req->nv2 != -1.)
		1911	{
		1912	tv[0].tv_sec = req->nv1;
		1913	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1e6;
		1914	tv[1].tv_sec = req->nv2;
		1915	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1e6;
		1916
		1917	times = tv;
		1918	}
		1919	else
		1920	times = 0;
		1921
		1922	req->result = req->type == EIO_FUTIME
		1923	? futimes (req->int1, times)
		1924	: utimes (req->ptr1, times);
		1925	}
		1926	break;
		1927
		1928	#endif
		1929
		1930	case EIO_REALPATH: if (0 <= (req->result = eio__realpath (&self->tmpbuf, req->wd, req->ptr1)))
		1931	{
		1932	ALLOC (req->result);
		1933	memcpy (req->ptr2, self->tmpbuf.ptr, req->result);
		1934	}
		1935	break;
		1936
		1937	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1938	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1939
		1940	case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		1941	req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
		1942
		1943	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1944	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
		1945	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
		1946
		1947	case EIO_CLOSE: req->result = close (req->int1); break;
		1948	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
		1949	case EIO_SYNC: req->result = 0; sync (); break;
		1950	case EIO_FSYNC: req->result = fsync (req->int1); break;
		1951	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		1952	case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break;
		1953	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
		1954	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
		1955	case EIO_MTOUCH: req->result = eio__mtouch (req); break;
		1956	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
		1957	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
		1958	case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;
		1959
		1960	case EIO_READDIR: eio__scandir (req, self); break;
		1961
		1962	case EIO_BUSY:
		1963	#ifdef _WIN32
		1964	Sleep (req->nv1 * 1e3);
		1965	#else
		1966	{
		1967	struct timeval tv;
		1968
		1969	tv.tv_sec = req->nv1;
		1970	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6;
		1971
		1972	req->result = select (0, 0, 0, 0, &tv);
		1973	}
		1974	#endif
		1975	break;
		1976
		1977	#if 0
		1978	case EIO_GROUP:
		1979	abort (); /* handled in eio_request */
		1980	#endif
		1981
		1982	case EIO_NOP:
		1983	req->result = 0;
		1984	break;
		1985
		1986	case EIO_CUSTOM:
		1987	req->feed (req);
		1988	break;
		1989
		1990	default:
		1991	req->result = EIO_ENOSYS ();
		1992	break;
		1993	}
		1994
		1995	req->errorno = errno;
		1996	}
		1997
		1998	#ifndef EIO_NO_WRAPPERS
		1999
		2000	eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data)
		2001	{
		2002	REQ (EIO_WD_OPEN); PATH; SEND;
		2003	}
		2004
		2005	eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data)
		2006	{
		2007	REQ (EIO_WD_CLOSE); req->wd = wd; SEND;
		2008	}
		2009
		2010	eio_req *eio_nop (int pri, eio_cb cb, void *data)
		2011	{
		2012	REQ (EIO_NOP); SEND;
		2013	}
		2014
		2015	eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
		2016	{
		2017	REQ (EIO_BUSY); req->nv1 = delay; SEND;
		2018	}
		2019
1057	eio_req *eio_fsync (int fd, eio_cb cb)	2020	eio_req *eio_sync (int pri, eio_cb cb, void *data)
1058	{	2021	{
		2022	REQ (EIO_SYNC); SEND;
		2023	}
		2024
		2025	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
		2026	{
1059	REQ (FSYNC); req->int1 = fd; SEND;	2027	REQ (EIO_FSYNC); req->int1 = fd; SEND;
1060	}	2028	}
1061		2029
		2030	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		2031	{
		2032	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		2033	}
		2034
1062	eio_req *eio_fdatasync (int fd, eio_cb cb)	2035	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1063	{	2036	{
1064	REQ (FDATASYNC); req->int1 = fd; SEND;	2037	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
1065	}	2038	}
1066		2039
		2040	eio_req *eio_syncfs (int fd, int pri, eio_cb cb, void *data)
		2041	{
		2042	REQ (EIO_SYNCFS); req->int1 = fd; SEND;
		2043	}
		2044
		2045	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
		2046	{
		2047	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
		2048	}
		2049
		2050	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		2051	{
		2052	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		2053	}
		2054
		2055	eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data)
		2056	{
		2057	REQ (EIO_MLOCK); req->ptr2 = addr; req->size = length; SEND;
		2058	}
		2059
		2060	eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)
		2061	{
		2062	REQ (EIO_MLOCKALL); req->int1 = flags; SEND;
		2063	}
		2064
		2065	eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)
		2066	{
		2067	REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;
		2068	}
		2069
		2070	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
		2071	{
		2072	REQ (EIO_CLOSE); req->int1 = fd; SEND;
		2073	}
		2074
1067	eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb)	2075	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
1068	{	2076	{
1069	REQ (READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;	2077	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
1070	}	2078	}
1071		2079
1072	eio_req *eio_read (int fd, off_t offset, size_t length, void *data, eio_cb cb)	2080	eio_req *eio_seek (int fd, off_t offset, int whence, int pri, eio_cb cb, void *data)
1073	{	2081	{
		2082	REQ (EIO_SEEK); req->int1 = fd; req->offs = offset; req->int2 = whence; SEND;
		2083	}
		2084
		2085	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		2086	{
1074	REQ (READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND;	2087	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1075	}	2088	}
1076		2089
1077	eio_req *eio_write (int fd, off_t offset, size_t length, void *data, eio_cb cb)	2090	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
1078	{	2091	{
1079	REQ (WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND;	2092	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1080	}	2093	}
1081		2094
		2095	eio_req *eio_fcntl (int fd, int cmd, void *arg, int pri, eio_cb cb, void *data)
		2096	{
		2097	REQ (EIO_IOCTL); req->int1 = fd; req->int2 = cmd; req->ptr2 = arg; SEND;
		2098	}
		2099
		2100	eio_req *eio_ioctl (int fd, unsigned long request, void *buf, int pri, eio_cb cb, void *data)
		2101	{
		2102	REQ (EIO_IOCTL); req->int1 = fd; req->int2 = request; req->ptr2 = buf; SEND;
		2103	}
		2104
1082	eio_req *eio_fstat (int fd, eio_cb cb)	2105	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
1083	{	2106	{
1084	REQ (FSTAT); req->int1 = fd; SEND;	2107	REQ (EIO_FSTAT); req->int1 = fd; SEND;
1085	}	2108	}
1086		2109
		2110	eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data)
		2111	{
		2112	REQ (EIO_FSTATVFS); req->int1 = fd; SEND;
		2113	}
		2114
1087	eio_req *eio_futime (int fd, double atime, double mtime, eio_cb cb)	2115	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
1088	{	2116	{
1089	REQ (FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;	2117	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
1090	}	2118	}
1091		2119
1092	eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb)	2120	eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
1093	{	2121	{
1094	REQ (FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;	2122	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
1095	}	2123	}
1096		2124
1097	eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb)	2125	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
1098	{	2126	{
1099	REQ (FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;	2127	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
1100	}	2128	}
1101		2129
1102	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb)	2130	eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
1103	{	2131	{
1104	REQ (FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	2132	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1105	}	2133	}
1106		2134
1107	eio_req *eio_dup2 (int fd, int fd2, eio_cb cb)	2135	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
1108	{	2136	{
1109	REQ (DUP2); req->int1 = fd; req->int2 = fd2; SEND;	2137	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
1110	}	2138	}
1111		2139
1112	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb)	2140	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data)
1113	{	2141	{
1114	REQ (SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;	2142	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
1115	}	2143	}
1116		2144
1117	eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb)	2145	eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
1118	{	2146	{
1119	REQ (OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;	2147	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
1120	}	2148	}
1121		2149
1122	eio_req *eio_readlink (const char *path, eio_cb cb)
1123	{
1124	REQ (READLINK); PATH; SEND;
1125	}
1126
1127	eio_req *eio_stat (const char *path, eio_cb cb)
1128	{
1129	REQ (STAT); PATH; SEND;
1130	}
1131
1132	eio_req *eio_lstat (const char *path, eio_cb cb)
1133	{
1134	REQ (LSTAT); PATH; SEND;
1135	}
1136
1137	eio_req *eio_utime (const char *path, double atime, double mtime, eio_cb cb)	2150	eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
1138	{	2151	{
1139	REQ (UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;	2152	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
1140	}	2153	}
1141		2154
1142	eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb)	2155	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
1143	{	2156	{
1144	REQ (TRUNCATE); PATH; req->offs = offset; SEND;	2157	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
1145	}	2158	}
1146		2159
1147	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb)	2160	eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
1148	{	2161	{
1149	REQ (CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	2162	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1150	}	2163	}
1151		2164
1152	eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb)	2165	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1153	{	2166	{
1154	REQ (CHMOD); PATH; req->int2 = (long)mode; SEND;	2167	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
1155	}	2168	}
1156		2169
1157	eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb)	2170	eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1158	{	2171	{
1159	REQ (MKDIR); PATH; req->int2 = (long)mode; SEND;	2172	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
1160	}	2173	}
1161		2174
1162	eio_req *eio_unlink (const char *path, eio_cb cb)	2175	static eio_req *
		2176	eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
1163	{	2177	{
1164	REQ (UNLINK); PATH; SEND;
1165	}
1166
1167	eio_req *eio_rmdir (const char *path, eio_cb cb)
1168	{
1169	REQ (RMDIR); PATH; SEND;	2178	REQ (type); PATH; SEND;
1170	}	2179	}
1171		2180
		2181	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
		2182	{
		2183	return eio__1path (EIO_READLINK, path, pri, cb, data);
		2184	}
		2185
		2186	eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data)
		2187	{
		2188	return eio__1path (EIO_REALPATH, path, pri, cb, data);
		2189	}
		2190
		2191	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
		2192	{
		2193	return eio__1path (EIO_STAT, path, pri, cb, data);
		2194	}
		2195
		2196	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
		2197	{
		2198	return eio__1path (EIO_LSTAT, path, pri, cb, data);
		2199	}
		2200
		2201	eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data)
		2202	{
		2203	return eio__1path (EIO_STATVFS, path, pri, cb, data);
		2204	}
		2205
		2206	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
		2207	{
		2208	return eio__1path (EIO_UNLINK, path, pri, cb, data);
		2209	}
		2210
1172	eio_req *eio_readdir (const char *path, eio_cb cb)	2211	eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
1173	{	2212	{
1174	REQ (READDIR); PATH; SEND;	2213	return eio__1path (EIO_RMDIR, path, pri, cb, data);
1175	}	2214	}
1176		2215
		2216	eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data)
		2217	{
		2218	REQ (EIO_READDIR); PATH; req->int1 = flags; SEND;
		2219	}
		2220
1177	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb)	2221	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
1178	{	2222	{
1179	REQ (MKNOD); PATH; req->int2 = (long)mode; req->int2 = (long)dev; SEND;	2223	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND;
1180	}	2224	}
1181		2225
1182	eio_req *eio_busy (double delay, eio_cb cb)	2226	static eio_req *
		2227	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1183	{	2228	{
1184	REQ (BUSY); req->nv1 = delay; SEND;	2229	REQ (type); PATH;
1185	}
1186		2230
		2231	req->flags |= EIO_FLAG_PTR2_FREE;
		2232	req->ptr2 = strdup (new_path);
		2233	if (!req->ptr2)
		2234	{
		2235	eio_api_destroy (req);
		2236	return 0;
		2237	}
		2238
		2239	SEND;
		2240	}
		2241
		2242	eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2243	{
		2244	return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
		2245	}
		2246
		2247	eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2248	{
		2249	return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
		2250	}
		2251
		2252	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2253	{
		2254	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
		2255	}
		2256
		2257	eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data)
		2258	{
		2259	REQ (EIO_CUSTOM); req->feed = execute; SEND;
		2260	}
		2261
		2262	#endif
		2263
1187	eio_req *eio_nop (eio_cb cb)	2264	eio_req *eio_grp (eio_cb cb, void *data)
1188	{	2265	{
		2266	const int pri = EIO_PRI_MAX;
		2267
1189	REQ (NOP); SEND;	2268	REQ (EIO_GROUP); SEND;
1190	}	2269	}
1191		2270
1192	#undef REQ	2271	#undef REQ
1193	#undef PATH	2272	#undef PATH
1194	#undef SEND	2273	#undef SEND
1195		2274
1196	#if 0	2275	/*****************************************************************************/
		2276	/* grp functions */
1197		2277
1198	void	2278	void
1199	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1200	PROTOTYPE: $$$;$
1201	PPCODE:
1202	{
1203	dREQ;
1204
1205	req->type = EIO_OPEN;
1206	req->sv1 = newSVsv (pathname);
1207	req->ptr1 = SvPVbyte_nolen (req->sv1);
1208	req->int1 = flags;
1209	req->int2 = mode;
1210
1211	EIO_SEND;
1212	}
1213
1214	void
1215	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1216	PROTOTYPE: $;$
1217	ALIAS:
1218	aio_fsync = EIO_FSYNC
1219	aio_fdatasync = EIO_FDATASYNC
1220	PPCODE:
1221	{
1222	dREQ;
1223
1224	req->type = ix;
1225	req->sv1 = newSVsv (fh);
1226	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1227
1228	EIO_SEND (req);
1229	}
1230
1231	void
1232	aio_close (SV *fh, SV *callback=&PL_sv_undef)
1233	PROTOTYPE: $;$
1234	PPCODE:
1235	{
1236	dREQ;
1237
1238	req->type = EIO_CLOSE;
1239	req->sv1 = newSVsv (fh);
1240	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1241
1242	EIO_SEND (req);
1243	}
1244
1245	void
1246	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1247	ALIAS:
1248	aio_read = EIO_READ
1249	aio_write = EIO_WRITE
1250	PROTOTYPE: $$$$$;$
1251	PPCODE:
1252	{
1253	STRLEN svlen;
1254	char *svptr = SvPVbyte (data, svlen);
1255	UV len = SvUV (length);
1256
1257	SvUPGRADE (data, SVt_PV);
1258	SvPOK_on (data);
1259
1260	if (dataoffset < 0)
1261	dataoffset += svlen;
1262
1263	if (dataoffset < 0 || dataoffset > svlen)
1264	croak ("dataoffset outside of data scalar");
1265
1266	if (ix == EIO_WRITE)
1267	{
1268	/* write: check length and adjust. */
1269	if (!SvOK (length) || len + dataoffset > svlen)
1270	len = svlen - dataoffset;
1271	}
1272	else
1273	{
1274	/* read: grow scalar as necessary */
1275	svptr = SvGROW (data, len + dataoffset + 1);
1276	}
1277
1278	if (len < 0)
1279	croak ("length must not be negative");
1280
1281	{
1282	dREQ;
1283
1284	req->type = ix;
1285	req->sv1 = newSVsv (fh);
1286	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1287	: IoOFP (sv_2io (fh)));
1288	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1289	req->size = len;
1290	req->sv2 = SvREFCNT_inc (data);
1291	req->ptr2 = (char *)svptr + dataoffset;
1292	req->stroffset = dataoffset;
1293
1294	if (!SvREADONLY (data))
1295	{
1296	SvREADONLY_on (data);
1297	req->flags |= FLAG_SV2_RO_OFF;
1298	}
1299
1300	EIO_SEND;
1301	}
1302	}
1303
1304	void
1305	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1306	PROTOTYPE: $$;$
1307	PPCODE:
1308	{
1309	SV *data;
1310	dREQ;
1311
1312	data = newSV (NAME_MAX);
1313	SvPOK_on (data);
1314
1315	req->type = EIO_READLINK;
1316	req->sv1 = newSVsv (path);
1317	req->ptr1 = SvPVbyte_nolen (req->sv1);
1318	req->sv2 = data;
1319	req->ptr2 = SvPVbyte_nolen (data);
1320
1321	EIO_SEND;
1322	}
1323
1324	void
1325	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1326	PROTOTYPE: $$$$;$
1327	PPCODE:
1328	{
1329	dREQ;
1330
1331	req->type = EIO_SENDFILE;
1332	req->sv1 = newSVsv (out_fh);
1333	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1334	req->sv2 = newSVsv (in_fh);
1335	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1336	req->offs = SvVAL64 (in_offset);
1337	req->size = length;
1338
1339	EIO_SEND;
1340	}
1341
1342	void
1343	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1344	PROTOTYPE: $$$;$
1345	PPCODE:
1346	{
1347	dREQ;
1348
1349	req->type = EIO_READAHEAD;
1350	req->sv1 = newSVsv (fh);
1351	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1352	req->offs = SvVAL64 (offset);
1353	req->size = length;
1354
1355	EIO_SEND;
1356	}
1357
1358	void
1359	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1360	ALIAS:
1361	aio_stat = EIO_STAT
1362	aio_lstat = EIO_LSTAT
1363	PPCODE:
1364	{
1365	dREQ;
1366
1367	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1368	if (!req->ptr2)
1369	{
1370	req_destroy (req);
1371	croak ("out of memory during aio_stat statdata allocation");
1372	}
1373
1374	req->flags |= FLAG_PTR2_FREE;
1375	req->sv1 = newSVsv (fh_or_path);
1376
1377	if (SvPOK (fh_or_path))
1378	{
1379	req->type = ix;
1380	req->ptr1 = SvPVbyte_nolen (req->sv1);
1381	}
1382	else
1383	{
1384	req->type = EIO_FSTAT;
1385	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1386	}
1387
1388	EIO_SEND;
1389	}
1390
1391	void
1392	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
1393	PPCODE:
1394	{
1395	dREQ;
1396
1397	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1398	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1399	req->sv1 = newSVsv (fh_or_path);
1400
1401	if (SvPOK (fh_or_path))
1402	{
1403	req->type = EIO_UTIME;
1404	req->ptr1 = SvPVbyte_nolen (req->sv1);
1405	}
1406	else
1407	{
1408	req->type = EIO_FUTIME;
1409	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1410	}
1411
1412	EIO_SEND;
1413	}
1414
1415	void
1416	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
1417	PPCODE:
1418	{
1419	dREQ;
1420
1421	req->sv1 = newSVsv (fh_or_path);
1422	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1423
1424	if (SvPOK (fh_or_path))
1425	{
1426	req->type = EIO_TRUNCATE;
1427	req->ptr1 = SvPVbyte_nolen (req->sv1);
1428	}
1429	else
1430	{
1431	req->type = EIO_FTRUNCATE;
1432	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1433	}
1434
1435	EIO_SEND;
1436	}
1437
1438	void
1439	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
1440	ALIAS:
1441	aio_chmod = EIO_CHMOD
1442	aio_fchmod = EIO_FCHMOD
1443	aio_mkdir = EIO_MKDIR
1444	PPCODE:
1445	{
1446	dREQ;
1447
1448	req->type = type;
1449	req->int2 = mode;
1450	req->sv1 = newSVsv (fh_or_path);
1451
1452	if (ix == EIO_FCHMOD)
1453	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1454	else
1455	req->ptr1 = SvPVbyte_nolen (req->sv1);
1456
1457	EIO_SEND;
1458	}
1459
1460	void
1461	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
1462	PPCODE:
1463	{
1464	dREQ;
1465
1466	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1467	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1468	req->sv1 = newSVsv (fh_or_path);
1469
1470	if (SvPOK (fh_or_path))
1471	{
1472	req->type = EIO_CHOWN;
1473	req->ptr1 = SvPVbyte_nolen (req->sv1);
1474	}
1475	else
1476	{
1477	req->type = EIO_FCHOWN;
1478	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1479	}
1480
1481	EIO_SEND;
1482	}
1483
1484	void
1485	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1486	ALIAS:
1487	aio_unlink = EIO_UNLINK
1488	aio_rmdir = EIO_RMDIR
1489	aio_readdir = EIO_READDIR
1490	PPCODE:
1491	{
1492	dREQ;
1493
1494	req->type = ix;
1495	req->sv1 = newSVsv (pathname);
1496	req->ptr1 = SvPVbyte_nolen (req->sv1);
1497
1498	EIO_SEND;
1499	}
1500
1501	void
1502	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1503	ALIAS:
1504	aio_link = EIO_LINK
1505	aio_symlink = EIO_SYMLINK
1506	aio_rename = EIO_RENAME
1507	PPCODE:
1508	{
1509	dREQ;
1510
1511	req->type = ix;
1512	req->sv1 = newSVsv (oldpath);
1513	req->ptr1 = SvPVbyte_nolen (req->sv1);
1514	req->sv2 = newSVsv (newpath);
1515	req->ptr2 = SvPVbyte_nolen (req->sv2);
1516
1517	EIO_SEND;
1518	}
1519
1520	void
1521	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1522	PPCODE:
1523	{
1524	dREQ;
1525
1526	req->type = EIO_MKNOD;
1527	req->sv1 = newSVsv (pathname);
1528	req->ptr1 = SvPVbyte_nolen (req->sv1);
1529	req->int2 = (mode_t)mode;
1530	req->offs = dev;
1531
1532	EIO_SEND;
1533	}
1534
1535	void
1536	aio_busy (double delay, SV *callback=&PL_sv_undef)
1537	PPCODE:
1538	{
1539	dREQ;
1540
1541	req->type = EIO_BUSY;
1542	req->nv1 = delay < 0. ? 0. : delay;
1543
1544	EIO_SEND;
1545	}
1546
1547	void
1548	aio_group (SV *callback=&PL_sv_undef)
1549	PROTOTYPE: ;$
1550	PPCODE:
1551	{
1552	dREQ;
1553
1554	req->type = EIO_GROUP;
1555
1556	req_send (req);
1557	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1558	}
1559
1560	void
1561	aio_nop (SV *callback=&PL_sv_undef)
1562	ALIAS:
1563	aio_nop = EIO_NOP
1564	aio_sync = EIO_SYNC
1565	PPCODE:
1566	{
1567	dREQ;
1568
1569	#endif
1570
1571	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)	2279	eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1572	{	2280	{
1573	grp->int2 = limit;	2281	grp->int2 = limit;
1574	grp->feed = feed;	2282	grp->feed = feed;
1575		2283
1576	grp_try_feed (grp);	2284	grp_try_feed (grp);
1577	}	2285	}
1578		2286
		2287	void
1579	void eio_grp_limit (eio_req *grp, int limit)	2288	eio_grp_limit (eio_req *grp, int limit)
1580	{	2289	{
1581	grp->int2 = limit;	2290	grp->int2 = limit;
1582		2291
1583	grp_try_feed (grp);	2292	grp_try_feed (grp);
1584	}	2293	}
1585		2294
		2295	void
1586	void eio_grp_add (eio_req *grp, eio_req *req)	2296	eio_grp_add (eio_req *grp, eio_req *req)
1587	{	2297	{
1588	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	2298	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
		2299
		2300	grp->flags |= ETP_FLAG_GROUPADD;
1589		2301
1590	++grp->size;	2302	++grp->size;
1591	req->grp = grp;	2303	req->grp = grp;
1592		2304
1593	req->grp_prev = 0;	2305	req->grp_prev = 0;
…		…
1597	grp->grp_first->grp_prev = req;	2309	grp->grp_first->grp_prev = req;
1598		2310
1599	grp->grp_first = req;	2311	grp->grp_first = req;
1600	}	2312	}
1601		2313
		2314	/*****************************************************************************/
		2315	/* misc garbage */
1602		2316
		2317	eio_ssize_t
		2318	eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
		2319	{
		2320	return eio__sendfile (ofd, ifd, offset, count);
		2321	}
		2322

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