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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 1.95 by root, Tue Jul 19 04:56:43 2011 UTC

		1	/*
		2	* libeio implementation
		3	*
		4	* Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libeio@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without modifica-
		8	* tion, are permitted provided that the following conditions are met:
		9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*
		28	* Alternatively, the contents of this file may be used under the terms of
		29	* the GNU General Public License ("GPL") version 2 or any later version,
		30	* in which case the provisions of the GPL are applicable instead of
		31	* the above. If you wish to allow the use of your version of this file
		32	* only under the terms of the GPL and not to allow others to use your
		33	* version of this file under the BSD license, indicate your decision
		34	* by deleting the provisions above and replace them with the notice
		35	* and other provisions required by the GPL. If you do not delete the
		36	* provisions above, a recipient may use your version of this file under
		37	* either the BSD or the GPL.
		38	*/
		39
		40	#ifndef _WIN32
		41	# include "config.h"
		42	#endif
		43
1	#include "eio.h"	44	#include "eio.h"
		45	#include "ecb.h"
		46
		47	#ifdef EIO_STACKSIZE
		48	# define XTHREAD_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	#ifdef EIO_STRUCT_STATI64
		111	#define stat(path,buf) _stati64 (path,buf)
		112	#define fstat(fd,buf) _fstati64 (fd,buf)
		113	#endif
		114	#define lstat(path,buf) stat (path,buf)
		115	#define fsync(fd) (FlushFileBuffers ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1))
		116	#define mkdir(path,mode) _mkdir (path)
		117	#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))
		118
		119	#define chmod(path,mode) _chmod (path, mode)
		120	#define dup(fd) _dup (fd)
		121	#define dup2(fd1,fd2) _dup2 (fd1, fd2)
		122
		123	#define fchmod(fd,mode) EIO_ENOSYS ()
		124	#define chown(path,uid,gid) EIO_ENOSYS ()
		125	#define fchown(fd,uid,gid) EIO_ENOSYS ()
		126	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
		127	#define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */
		128	#define mknod(path,mode,dev) EIO_ENOSYS ()
		129	#define sync() EIO_ENOSYS ()
		130	#define readlink(path,buf,s) EIO_ENOSYS ()
		131	#define statvfs(path,buf) EIO_ENOSYS ()
		132	#define fstatvfs(fd,buf) EIO_ENOSYS ()
		133
		134	/* we could even stat and see if it exists */
		135	static int
		136	symlink (const char *old, const char *neu)
		137	{
		138	#if WINVER >= 0x0600
		139	if (CreateSymbolicLink (neu, old, 1))
		140	return 0;
		141
		142	if (CreateSymbolicLink (neu, old, 0))
		143	return 0;
		144	#endif
		145
		146	return EIO_ERRNO (ENOENT, -1);
		147	}
		148
		149	/* POSIX API only */
		150	#define CreateHardLink(neu,old,flags) 0
		151	#define CreateSymbolicLink(neu,old,flags) 0
		152
		153	struct statvfs
		154	{
		155	int dummy;
		156	};
		157
		158	#define DT_DIR EIO_DT_DIR
		159	#define DT_REG EIO_DT_REG
		160	#define D_NAME(entp) entp.cFileName
		161	#define D_TYPE(entp) (entp.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ? DT_DIR : DT_REG)
30		162
31	#else	163	#else
32		164
33	# include "config.h"
34	# include <sys/time.h>	165	#include <sys/time.h>
35	# include <sys/select.h>	166	#include <sys/select.h>
		167	#include <sys/statvfs.h>
36	# include <unistd.h>	168	#include <unistd.h>
37	# include <utime.h>	169	#include <utime.h>
38	# include <signal.h>	170	#include <signal.h>
39	# include <dirent.h>	171	#include <dirent.h>
40		172
		173	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		174	#include <sys/mman.h>
		175	#endif
		176
		177	#define D_NAME(entp) entp->d_name
		178
		179	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
		180	#if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__
		181	#define _DIRENT_HAVE_D_TYPE /* sigh */
		182	#define D_INO(de) (de)->d_fileno
		183	#define D_NAMLEN(de) (de)->d_namlen
		184	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
		185	#define D_INO(de) (de)->d_ino
		186	#endif
		187
		188	#ifdef _D_EXACT_NAMLEN
		189	#undef D_NAMLEN
		190	#define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
		191	#endif
		192
		193	#ifdef _DIRENT_HAVE_D_TYPE
		194	#define D_TYPE(de) (de)->d_type
		195	#endif
		196
41	# ifndef EIO_STRUCT_DIRENT	197	#ifndef EIO_STRUCT_DIRENT
42	# define EIO_STRUCT_DIRENT struct dirent	198	#define EIO_STRUCT_DIRENT struct dirent
		199	#endif
		200
43	# endif	201	#endif
44
45	#endif
46
47	# ifndef EIO_STRUCT_STAT
48	# define EIO_STRUCT_STAT struct stat
49	# endif
50		202
51	#if HAVE_SENDFILE	203	#if HAVE_SENDFILE
52	# if __linux	204	# if __linux
53	# include <sys/sendfile.h>	205	# include <sys/sendfile.h>
54	# elif __freebsd	206	# elif __FreeBSD__ || defined __APPLE__
55	# include <sys/socket.h>	207	# include <sys/socket.h>
56	# include <sys/uio.h>	208	# include <sys/uio.h>
57	# elif __hpux	209	# elif __hpux
58	# include <sys/socket.h>	210	# include <sys/socket.h>
59	# elif __solaris /* not yet */	211	# elif __solaris
60	# include <sys/sendfile.h>	212	# include <sys/sendfile.h>
61	# else	213	# else
62	# error sendfile support requested but not available	214	# error sendfile support requested but not available
63	# endif	215	# endif
64	#endif	216	#endif
65		217
66	/* number of seconds after which an idle threads exit */	218	#ifndef D_TYPE
67	#define IDLE_TIMEOUT 10	219	# define D_TYPE(de) 0
		220	#endif
		221	#ifndef D_INO
		222	# define D_INO(de) 0
		223	#endif
		224	#ifndef D_NAMLEN
		225	# define D_NAMLEN(entp) strlen (D_NAME (entp))
		226	#endif
68		227
69	/* used for struct dirent, AIX doesn't provide it */	228	/* used for struct dirent, AIX doesn't provide it */
70	#ifndef NAME_MAX	229	#ifndef NAME_MAX
71	# define NAME_MAX 4096	230	# define NAME_MAX 4096
72	#endif	231	#endif
73		232
		233	/* used for readlink etc. */
		234	#ifndef PATH_MAX
		235	# define PATH_MAX 4096
		236	#endif
		237
74	/* buffer size for various temporary buffers */	238	/* buffer size for various temporary buffers */
75	#define EIO_BUFSIZE 65536	239	#define EIO_BUFSIZE 65536
76		240
77	#define dBUF \	241	#define dBUF \
78	char *eio_buf; \
79	X_LOCK (wrklock); \
80	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	242	char *eio_buf = malloc (EIO_BUFSIZE); \
81	X_UNLOCK (wrklock); \	243	errno = ENOMEM; \
82	if (!eio_buf) \	244	if (!eio_buf) \
83	return -1;	245	return -1
		246
		247	#define FUBd \
		248	free (eio_buf)
84		249
85	#define EIO_TICKS ((1000000 + 1023) >> 10)	250	#define EIO_TICKS ((1000000 + 1023) >> 10)
		251
		252	#define ETP_PRI_MIN EIO_PRI_MIN
		253	#define ETP_PRI_MAX EIO_PRI_MAX
		254
		255	struct etp_worker;
		256
		257	#define ETP_REQ eio_req
		258	#define ETP_DESTROY(req) eio_destroy (req)
		259	static int eio_finish (eio_req *req);
		260	#define ETP_FINISH(req) eio_finish (req)
		261	static void eio_execute (struct etp_worker *self, eio_req *req);
		262	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)
		263
		264	/*****************************************************************************/
		265
		266	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
		267
		268	/* calculate time difference in ~1/EIO_TICKS of a second */
		269	ecb_inline int
		270	tvdiff (struct timeval *tv1, struct timeval *tv2)
		271	{
		272	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
		273	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		274	}
		275
		276	static unsigned int started, idle, wanted = 4;
86		277
87	static void (*want_poll_cb) (void);	278	static void (*want_poll_cb) (void);
88	static void (*done_poll_cb) (void);	279	static void (*done_poll_cb) (void);
89		280
90	static unsigned int max_poll_time = 0;	281	static unsigned int max_poll_time; /* reslock */
91	static unsigned int max_poll_reqs = 0;	282	static unsigned int max_poll_reqs; /* reslock */
92		283
93	/* calculcate time difference in ~1/EIO_TICKS of a second */	284	static volatile unsigned int nreqs; /* reqlock */
94	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	285	static volatile unsigned int nready; /* reqlock */
95	{	286	static volatile unsigned int npending; /* reqlock */
96	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	287	static volatile unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */
97	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);	288	static volatile unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */
98	}
99		289
100	static unsigned int started, idle, wanted;	290	static xmutex_t wrklock;
		291	static xmutex_t reslock;
		292	static xmutex_t reqlock;
		293	static xcond_t reqwait;
		294
		295	#if !HAVE_PREADWRITE
		296	/*
		297	* make our pread/pwrite emulation safe against themselves, but not against
		298	* normal read/write by using a mutex. slows down execution a lot,
		299	* but that's your problem, not mine.
		300	*/
		301	static xmutex_t preadwritelock;
		302	#endif
		303
		304	typedef struct etp_worker
		305	{
		306	/* locked by wrklock */
		307	struct etp_worker *prev, *next;
		308
		309	xthread_t tid;
		310
		311	/* locked by reslock, reqlock or wrklock */
		312	ETP_REQ *req; /* currently processed request */
		313
		314	#ifdef ETP_WORKER_COMMON
		315	ETP_WORKER_COMMON
		316	#endif
		317	} etp_worker;
		318
		319	static etp_worker wrk_first; /* NOT etp */
		320
		321	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
		322	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
101		323
102	/* worker threads management */	324	/* worker threads management */
103	static mutex_t wrklock = X_MUTEX_INIT;
104		325
105	typedef struct worker {	326	static void ecb_cold
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)	327	etp_worker_clear (etp_worker *wrk)
120	{	328	{
121	if (wrk->dirp)
122	{
123	closedir (wrk->dirp);
124	wrk->dirp = 0;
125	}
126
127	if (wrk->dbuf)
128	{
129	free (wrk->dbuf);
130	wrk->dbuf = 0;
131	}
132	}	329	}
133		330
134	static void worker_free (worker *wrk)	331	static void ecb_cold
		332	etp_worker_free (etp_worker *wrk)
135	{	333	{
136	wrk->next->prev = wrk->prev;	334	wrk->next->prev = wrk->prev;
137	wrk->prev->next = wrk->next;	335	wrk->prev->next = wrk->next;
138		336
139	free (wrk);	337	free (wrk);
140	}	338	}
141		339
142	static volatile unsigned int nreqs, nready, npending;	340	static unsigned int
143	static volatile unsigned int max_idle = 4;	341	etp_nreqs (void)
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	{	342	{
		343	int retval;
		344	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		345	retval = nreqs;
		346	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
151	return nreqs;	347	return retval;
152	}	348	}
153		349
154	unsigned int eio_nready (void)	350	static unsigned int
		351	etp_nready (void)
155	{	352	{
156	unsigned int retval;	353	unsigned int retval;
157		354
158	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	355	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
159	retval = nready;	356	retval = nready;
160	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	357	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
161		358
162	return retval;	359	return retval;
163	}	360	}
164		361
165	unsigned int eio_npending (void)	362	static unsigned int
		363	etp_npending (void)
166	{	364	{
167	unsigned int retval;	365	unsigned int retval;
168		366
169	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	367	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
170	retval = npending;	368	retval = npending;
171	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	369	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
172		370
173	return retval;	371	return retval;
174	}	372	}
175		373
176	unsigned int eio_nthreads (void)	374	static unsigned int
		375	etp_nthreads (void)
177	{	376	{
178	unsigned int retval;	377	unsigned int retval;
179		378
180	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	379	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
181	retval = started;	380	retval = started;
…		…
188	* a somewhat faster data structure might be nice, but	387	* a somewhat faster data structure might be nice, but
189	* with 8 priorities this actually needs <20 insns	388	* with 8 priorities this actually needs <20 insns
190	* per shift, the most expensive operation.	389	* per shift, the most expensive operation.
191	*/	390	*/
192	typedef struct {	391	typedef struct {
193	eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */	392	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
194	int size;	393	int size;
195	} reqq;	394	} etp_reqq;
196		395
197	static reqq req_queue;	396	static etp_reqq req_queue;
198	static reqq res_queue;	397	static etp_reqq res_queue;
199		398
200	static int reqq_push (reqq *q, eio_req *req)	399	static void ecb_noinline ecb_cold
		400	reqq_init (etp_reqq *q)
		401	{
		402	int pri;
		403
		404	for (pri = 0; pri < ETP_NUM_PRI; ++pri)
		405	q->qs[pri] = q->qe[pri] = 0;
		406
		407	q->size = 0;
		408	}
		409
		410	static int ecb_noinline
		411	reqq_push (etp_reqq *q, ETP_REQ *req)
201	{	412	{
202	int pri = req->pri;	413	int pri = req->pri;
203	req->next = 0;	414	req->next = 0;
204		415
205	if (q->qe[pri])	416	if (q->qe[pri])
…		…
211	q->qe[pri] = q->qs[pri] = req;	422	q->qe[pri] = q->qs[pri] = req;
212		423
213	return q->size++;	424	return q->size++;
214	}	425	}
215		426
216	static eio_req *reqq_shift (reqq *q)	427	static ETP_REQ * ecb_noinline
		428	reqq_shift (etp_reqq *q)
217	{	429	{
218	int pri;	430	int pri;
219		431
220	if (!q->size)	432	if (!q->size)
221	return 0;	433	return 0;
222		434
223	--q->size;	435	--q->size;
224		436
225	for (pri = EIO_NUM_PRI; pri--; )	437	for (pri = ETP_NUM_PRI; pri--; )
226	{	438	{
227	eio_req *req = q->qs[pri];	439	eio_req *req = q->qs[pri];
228		440
229	if (req)	441	if (req)
230	{	442	{
…		…
236	}	448	}
237		449
238	abort ();	450	abort ();
239	}	451	}
240		452
241	static void grp_try_feed (eio_req *grp)	453	static int ecb_cold
		454	etp_init (void (*want_poll)(void), void (*done_poll)(void))
242	{	455	{
243	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	456	X_MUTEX_CREATE (wrklock);
244	{	457	X_MUTEX_CREATE (reslock);
245	int old_len = grp->size;	458	X_MUTEX_CREATE (reqlock);
		459	X_COND_CREATE (reqwait);
246		460
247	EIO_FEED (grp);	461	reqq_init (&req_queue);
		462	reqq_init (&res_queue);
248		463
249	/* stop if no progress has been made */	464	wrk_first.next =
250	if (old_len == grp->size)	465	wrk_first.prev = &wrk_first;
251	{
252	grp->feed = 0;
253	break;
254	}
255	}
256	}
257		466
258	static int eio_finish (eio_req *req);	467	started = 0;
		468	idle = 0;
		469	nreqs = 0;
		470	nready = 0;
		471	npending = 0;
259		472
260	static int grp_dec (eio_req *grp)	473	want_poll_cb = want_poll;
261	{	474	done_poll_cb = done_poll;
262	--grp->size;
263		475
264	/* call feeder, if applicable */
265	grp_try_feed (grp);
266
267	/* finish, if done */
268	if (!grp->size && grp->int1)
269	return eio_finish (grp);
270	else
271	return 0;	476	return 0;
272	}	477	}
273		478
274	void eio_destroy (eio_req *req)
275	{
276	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
277	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
278
279	EIO_DESTROY (req);
280	}
281
282	static int eio_finish (eio_req *req)
283	{
284	int res = EIO_FINISH (req);
285
286	if (req->grp)
287	{
288	int res2;
289	eio_req *grp = req->grp;
290
291	/* unlink request */
292	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
293	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
294
295	if (grp->grp_first == req)
296	grp->grp_first = req->grp_next;
297
298	res2 = grp_dec (grp);
299
300	if (!res && res2)
301	res = res2;
302	}
303
304	eio_destroy (req);
305
306	return res;
307	}
308
309	void eio_grp_cancel (eio_req *grp)
310	{
311	for (grp = grp->grp_first; grp; grp = grp->grp_next)
312	eio_cancel (grp);
313	}
314
315	void eio_cancel (eio_req *req)
316	{
317	X_LOCK (wrklock);
318	req->flags |= EIO_FLAG_CANCELLED;
319	X_UNLOCK (wrklock);
320
321	eio_grp_cancel (req);
322	}
323
324	X_THREAD_PROC (eio_proc);	479	X_THREAD_PROC (etp_proc);
325		480
326	static void start_thread (void)	481	static void ecb_cold
		482	etp_start_thread (void)
327	{	483	{
328	worker *wrk = calloc (1, sizeof (worker));	484	etp_worker *wrk = calloc (1, sizeof (etp_worker));
329		485
330	/*TODO*/	486	/*TODO*/
331	assert (("unable to allocate worker thread data", !wrk));	487	assert (("unable to allocate worker thread data", wrk));
332		488
333	X_LOCK (wrklock);	489	X_LOCK (wrklock);
334		490
335	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))	491	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
336	{	492	{
337	wrk->prev = &wrk_first;	493	wrk->prev = &wrk_first;
338	wrk->next = wrk_first.next;	494	wrk->next = wrk_first.next;
339	wrk_first.next->prev = wrk;	495	wrk_first.next->prev = wrk;
340	wrk_first.next = wrk;	496	wrk_first.next = wrk;
…		…
344	free (wrk);	500	free (wrk);
345		501
346	X_UNLOCK (wrklock);	502	X_UNLOCK (wrklock);
347	}	503	}
348		504
		505	static void
349	static void maybe_start_thread (void)	506	etp_maybe_start_thread (void)
350	{	507	{
351	if (eio_nthreads () >= wanted)	508	if (ecb_expect_true (etp_nthreads () >= wanted))
352	return;	509	return;
353		510
354	/* todo: maybe use idle here, but might be less exact */	511	/* todo: maybe use idle here, but might be less exact */
355	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())	512	if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
356	return;	513	return;
357		514
358	start_thread ();	515	etp_start_thread ();
359	}	516	}
360		517
361	void eio_submit (eio_req *req)	518	static void ecb_cold
362	{	519	etp_end_thread (void)
363	++nreqs;
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	}
373
374	static void end_thread (void)
375	{	520	{
376	eio_req *req = calloc (1, sizeof (eio_req));	521	eio_req *req = calloc (1, sizeof (eio_req));
377		522
378	req->type = EIO_QUIT;	523	req->type = -1;
379	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	524	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
380		525
381	X_LOCK (reqlock);	526	X_LOCK (reqlock);
382	reqq_push (&req_queue, req);	527	reqq_push (&req_queue, req);
383	X_COND_SIGNAL (reqwait);	528	X_COND_SIGNAL (reqwait);
384	X_UNLOCK (reqlock);	529	X_UNLOCK (reqlock);
…		…
386	X_LOCK (wrklock);	531	X_LOCK (wrklock);
387	--started;	532	--started;
388	X_UNLOCK (wrklock);	533	X_UNLOCK (wrklock);
389	}	534	}
390		535
391	void eio_set_max_poll_time (double nseconds)	536	static int
392	{
393	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
394	max_poll_time = nseconds;
395	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
396	}
397
398	void eio_set_max_poll_reqs (unsigned int maxreqs)
399	{
400	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
401	max_poll_reqs = maxreqs;
402	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
403	}
404
405	void eio_set_max_idle (unsigned int nthreads)
406	{
407	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
408	max_idle = nthreads <= 0 ? 1 : nthreads;
409	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
410	}
411
412	void eio_set_min_parallel (unsigned int nthreads)
413	{
414	if (wanted < nthreads)
415	wanted = nthreads;
416	}
417
418	void eio_set_max_parallel (unsigned int nthreads)
419	{
420	if (wanted > nthreads)
421	wanted = nthreads;
422
423	while (started > wanted)
424	end_thread ();
425	}
426
427	int eio_poll (void)	537	etp_poll (void)
428	{	538	{
429	int maxreqs = max_poll_reqs;	539	unsigned int maxreqs;
		540	unsigned int maxtime;
430	struct timeval tv_start, tv_now;	541	struct timeval tv_start, tv_now;
431	eio_req *req;
432		542
		543	X_LOCK (reslock);
		544	maxreqs = max_poll_reqs;
		545	maxtime = max_poll_time;
		546	X_UNLOCK (reslock);
		547
433	if (max_poll_time)	548	if (maxtime)
434	gettimeofday (&tv_start, 0);	549	gettimeofday (&tv_start, 0);
435		550
436	for (;;)	551	for (;;)
437	{	552	{
		553	ETP_REQ *req;
		554
438	maybe_start_thread ();	555	etp_maybe_start_thread ();
439		556
440	X_LOCK (reslock);	557	X_LOCK (reslock);
441	req = reqq_shift (&res_queue);	558	req = reqq_shift (&res_queue);
442		559
443	if (req)	560	if (req)
…		…
451	X_UNLOCK (reslock);	568	X_UNLOCK (reslock);
452		569
453	if (!req)	570	if (!req)
454	return 0;	571	return 0;
455		572
		573	X_LOCK (reqlock);
456	--nreqs;	574	--nreqs;
		575	X_UNLOCK (reqlock);
457		576
458	if (req->type == EIO_GROUP && req->size)	577	if (ecb_expect_false (req->type == EIO_GROUP && req->size))
459	{	578	{
460	req->int1 = 1; /* mark request as delayed */	579	req->int1 = 1; /* mark request as delayed */
461	continue;	580	continue;
462	}	581	}
463	else	582	else
464	{	583	{
465	int res = eio_finish (req);	584	int res = ETP_FINISH (req);
466	if (res)	585	if (ecb_expect_false (res))
467	return res;	586	return res;
468	}	587	}
469		588
470	if (maxreqs && !--maxreqs)	589	if (ecb_expect_false (maxreqs && !--maxreqs))
471	break;	590	break;
472		591
473	if (max_poll_time)	592	if (maxtime)
474	{	593	{
475	gettimeofday (&tv_now, 0);	594	gettimeofday (&tv_now, 0);
476		595
477	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)	596	if (tvdiff (&tv_start, &tv_now) >= maxtime)
478	break;	597	break;
479	}	598	}
480	}	599	}
481		600
482	errno = EAGAIN;	601	errno = EAGAIN;
483	return -1;	602	return -1;
484	}	603	}
485		604
		605	static void
		606	etp_cancel (ETP_REQ *req)
		607	{
		608	req->cancelled = 1;
		609
		610	eio_grp_cancel (req);
		611	}
		612
		613	static void
		614	etp_submit (ETP_REQ *req)
		615	{
		616	req->pri -= ETP_PRI_MIN;
		617
		618	if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
		619	if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
		620
		621	if (ecb_expect_false (req->type == EIO_GROUP))
		622	{
		623	/* I hope this is worth it :/ */
		624	X_LOCK (reqlock);
		625	++nreqs;
		626	X_UNLOCK (reqlock);
		627
		628	X_LOCK (reslock);
		629
		630	++npending;
		631
		632	if (!reqq_push (&res_queue, req) && want_poll_cb)
		633	want_poll_cb ();
		634
		635	X_UNLOCK (reslock);
		636	}
		637	else
		638	{
		639	X_LOCK (reqlock);
		640	++nreqs;
		641	++nready;
		642	reqq_push (&req_queue, req);
		643	X_COND_SIGNAL (reqwait);
		644	X_UNLOCK (reqlock);
		645
		646	etp_maybe_start_thread ();
		647	}
		648	}
		649
		650	static void ecb_cold
		651	etp_set_max_poll_time (double nseconds)
		652	{
		653	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		654	max_poll_time = nseconds * EIO_TICKS;
		655	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		656	}
		657
		658	static void ecb_cold
		659	etp_set_max_poll_reqs (unsigned int maxreqs)
		660	{
		661	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		662	max_poll_reqs = maxreqs;
		663	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		664	}
		665
		666	static void ecb_cold
		667	etp_set_max_idle (unsigned int nthreads)
		668	{
		669	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		670	max_idle = nthreads;
		671	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		672	}
		673
		674	static void ecb_cold
		675	etp_set_idle_timeout (unsigned int seconds)
		676	{
		677	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		678	idle_timeout = seconds;
		679	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		680	}
		681
		682	static void ecb_cold
		683	etp_set_min_parallel (unsigned int nthreads)
		684	{
		685	if (wanted < nthreads)
		686	wanted = nthreads;
		687	}
		688
		689	static void ecb_cold
		690	etp_set_max_parallel (unsigned int nthreads)
		691	{
		692	if (wanted > nthreads)
		693	wanted = nthreads;
		694
		695	while (started > wanted)
		696	etp_end_thread ();
		697	}
		698
		699	/*****************************************************************************/
		700
		701	static void
		702	grp_try_feed (eio_req *grp)
		703	{
		704	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
		705	{
		706	grp->flags &= ~EIO_FLAG_GROUPADD;
		707
		708	EIO_FEED (grp);
		709
		710	/* stop if no progress has been made */
		711	if (!(grp->flags & EIO_FLAG_GROUPADD))
		712	{
		713	grp->feed = 0;
		714	break;
		715	}
		716	}
		717	}
		718
		719	static int
		720	grp_dec (eio_req *grp)
		721	{
		722	--grp->size;
		723
		724	/* call feeder, if applicable */
		725	grp_try_feed (grp);
		726
		727	/* finish, if done */
		728	if (!grp->size && grp->int1)
		729	return eio_finish (grp);
		730	else
		731	return 0;
		732	}
		733
		734	static void
		735	eio_destroy (eio_req *req)
		736	{
		737	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
		738	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
		739
		740	EIO_DESTROY (req);
		741	}
		742
		743	static int
		744	eio_finish (eio_req *req)
		745	{
		746	int res = EIO_FINISH (req);
		747
		748	if (req->grp)
		749	{
		750	int res2;
		751	eio_req *grp = req->grp;
		752
		753	/* unlink request */
		754	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		755	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		756
		757	if (grp->grp_first == req)
		758	grp->grp_first = req->grp_next;
		759
		760	res2 = grp_dec (grp);
		761
		762	if (!res)
		763	res = res2;
		764	}
		765
		766	eio_destroy (req);
		767
		768	return res;
		769	}
		770
		771	void
		772	eio_grp_cancel (eio_req *grp)
		773	{
		774	for (grp = grp->grp_first; grp; grp = grp->grp_next)
		775	eio_cancel (grp);
		776	}
		777
		778	void
		779	eio_cancel (eio_req *req)
		780	{
		781	etp_cancel (req);
		782	}
		783
		784	void
		785	eio_submit (eio_req *req)
		786	{
		787	etp_submit (req);
		788	}
		789
		790	unsigned int
		791	eio_nreqs (void)
		792	{
		793	return etp_nreqs ();
		794	}
		795
		796	unsigned int
		797	eio_nready (void)
		798	{
		799	return etp_nready ();
		800	}
		801
		802	unsigned int
		803	eio_npending (void)
		804	{
		805	return etp_npending ();
		806	}
		807
		808	unsigned int ecb_cold
		809	eio_nthreads (void)
		810	{
		811	return etp_nthreads ();
		812	}
		813
		814	void ecb_cold
		815	eio_set_max_poll_time (double nseconds)
		816	{
		817	etp_set_max_poll_time (nseconds);
		818	}
		819
		820	void ecb_cold
		821	eio_set_max_poll_reqs (unsigned int maxreqs)
		822	{
		823	etp_set_max_poll_reqs (maxreqs);
		824	}
		825
		826	void ecb_cold
		827	eio_set_max_idle (unsigned int nthreads)
		828	{
		829	etp_set_max_idle (nthreads);
		830	}
		831
		832	void ecb_cold
		833	eio_set_idle_timeout (unsigned int seconds)
		834	{
		835	etp_set_idle_timeout (seconds);
		836	}
		837
		838	void ecb_cold
		839	eio_set_min_parallel (unsigned int nthreads)
		840	{
		841	etp_set_min_parallel (nthreads);
		842	}
		843
		844	void ecb_cold
		845	eio_set_max_parallel (unsigned int nthreads)
		846	{
		847	etp_set_max_parallel (nthreads);
		848	}
		849
		850	int eio_poll (void)
		851	{
		852	return etp_poll ();
		853	}
		854
486	/*****************************************************************************/	855	/*****************************************************************************/
487	/* work around various missing functions */	856	/* work around various missing functions */
488		857
489	#if !HAVE_PREADWRITE	858	#if !HAVE_PREADWRITE
		859	# undef pread
		860	# undef pwrite
490	# define pread aio_pread	861	# define pread eio__pread
491	# define pwrite aio_pwrite	862	# define pwrite eio__pwrite
492		863
493	/*	864	static eio_ssize_t
494	* make our pread/pwrite safe against themselves, but not against	865	eio__pread (int fd, void *buf, size_t count, off_t offset)
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	{	866	{
502	ssize_t res;	867	eio_ssize_t res;
503	off_t ooffset;	868	off_t ooffset;
504		869
505	X_LOCK (preadwritelock);	870	X_LOCK (preadwritelock);
506	ooffset = lseek (fd, 0, SEEK_CUR);	871	ooffset = lseek (fd, 0, SEEK_CUR);
507	lseek (fd, offset, SEEK_SET);	872	lseek (fd, offset, SEEK_SET);
…		…
510	X_UNLOCK (preadwritelock);	875	X_UNLOCK (preadwritelock);
511		876
512	return res;	877	return res;
513	}	878	}
514		879
515	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	880	static eio_ssize_t
		881	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
516	{	882	{
517	ssize_t res;	883	eio_ssize_t res;
518	off_t ooffset;	884	off_t ooffset;
519		885
520	X_LOCK (preadwritelock);	886	X_LOCK (preadwritelock);
521	ooffset = lseek (fd, 0, SEEK_CUR);	887	ooffset = lseek (fd, 0, SEEK_CUR);
522	lseek (fd, offset, SEEK_SET);	888	lseek (fd, offset, SEEK_SET);
523	res = write (fd, buf, count);	889	res = write (fd, buf, count);
524	lseek (fd, offset, SEEK_SET);	890	lseek (fd, ooffset, SEEK_SET);
525	X_UNLOCK (preadwritelock);	891	X_UNLOCK (preadwritelock);
526		892
527	return res;	893	return res;
528	}	894	}
529	#endif	895	#endif
530		896
531	#ifndef HAVE_FUTIMES	897	#ifndef HAVE_UTIMES
532		898
		899	# undef utimes
533	# define utimes(path,times) aio_utimes (path, times)	900	# define utimes(path,times) eio__utimes (path, times)
534	# define futimes(fd,times) aio_futimes (fd, times)
535		901
		902	static int
536	static int aio_utimes (const char *filename, const struct timeval times[2])	903	eio__utimes (const char *filename, const struct timeval times[2])
537	{	904	{
538	if (times)	905	if (times)
539	{	906	{
540	struct utimbuf buf;	907	struct utimbuf buf;
541		908
…		…
546	}	913	}
547	else	914	else
548	return utime (filename, 0);	915	return utime (filename, 0);
549	}	916	}
550		917
		918	#endif
		919
		920	#ifndef HAVE_FUTIMES
		921
		922	# undef futimes
		923	# define futimes(fd,times) eio__futimes (fd, times)
		924
		925	static int
551	static int aio_futimes (int fd, const struct timeval tv[2])	926	eio__futimes (int fd, const struct timeval tv[2])
552	{	927	{
553	errno = ENOSYS;	928	errno = ENOSYS;
554	return -1;	929	return -1;
555	}	930	}
556		931
557	#endif	932	#endif
558		933
559	#if !HAVE_FDATASYNC	934	#if !HAVE_FDATASYNC
		935	# undef fdatasync
560	# define fdatasync fsync	936	# define fdatasync(fd) fsync (fd)
561	#endif	937	#endif
		938
		939	/* sync_file_range always needs emulation */
		940	static int
		941	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
		942	{
		943	#if HAVE_SYNC_FILE_RANGE
		944	int res;
		945
		946	if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE
		947	|| EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE
		948	|| EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER)
		949	{
		950	flags = 0
		951	| (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0)
		952	| (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0)
		953	| (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0);
		954	}
		955
		956	res = sync_file_range (fd, offset, nbytes, flags);
		957
		958	if (!res || errno != ENOSYS)
		959	return res;
		960	#endif
		961
		962	/* even though we could play tricks with the flags, it's better to always
		963	* call fdatasync, as that matches the expectation of its users best */
		964	return fdatasync (fd);
		965	}
		966
		967	static int
		968	eio__fallocate (int fd, int mode, off_t offset, size_t len)
		969	{
		970	#if HAVE_FALLOCATE
		971	return fallocate (fd, mode, offset, len);
		972	#else
		973	errno = ENOSYS;
		974	return -1;
		975	#endif
		976	}
562		977
563	#if !HAVE_READAHEAD	978	#if !HAVE_READAHEAD
		979	# undef readahead
564	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	980	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
565		981
		982	static eio_ssize_t
566	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)	983	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
567	{	984	{
568	size_t todo = count;	985	size_t todo = count;
569	dBUF;	986	dBUF;
570		987
571	while (todo > 0)	988	while (todo > 0)
…		…
575	pread (fd, eio_buf, len, offset);	992	pread (fd, eio_buf, len, offset);
576	offset += len;	993	offset += len;
577	todo -= len;	994	todo -= len;
578	}	995	}
579		996
		997	FUBd;
		998
580	errno = 0;	999	errno = 0;
581	return count;	1000	return count;
582	}	1001	}
583		1002
584	#endif	1003	#endif
585		1004
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
615
616	/* sendfile always needs emulation */	1005	/* sendfile always needs emulation */
		1006	static eio_ssize_t
617	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)	1007	eio__sendfile (int ofd, int ifd, off_t offset, size_t count)
618	{	1008	{
		1009	eio_ssize_t written = 0;
619	ssize_t res;	1010	eio_ssize_t res;
620		1011
621	if (!count)	1012	if (!count)
622	return 0;	1013	return 0;
623		1014
		1015	for (;;)
		1016	{
		1017	#ifdef __APPLE__
		1018	# undef HAVE_SENDFILE /* broken, as everything on os x */
		1019	#endif
624	#if HAVE_SENDFILE	1020	#if HAVE_SENDFILE
625	# if __linux	1021	# if __linux
		1022	off_t soffset = offset;
626	res = sendfile (ofd, ifd, &offset, count);	1023	res = sendfile (ofd, ifd, &soffset, count);
627		1024
628	# elif __freebsd	1025	# elif __FreeBSD__
629	/*	1026	/*
630	* Of course, the freebsd sendfile is a dire hack with no thoughts	1027	* Of course, the freebsd sendfile is a dire hack with no thoughts
631	* wasted on making it similar to other I/O functions.	1028	* wasted on making it similar to other I/O functions.
632	*/	1029	*/
633	{
634	off_t sbytes;	1030	off_t sbytes;
635	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	1031	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
636		1032
637	if (res < 0 && sbytes)	1033	#if 0 /* according to the manpage, this is correct, but broken behaviour */
638	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */	1034	/* freebsd' sendfile will return 0 on success */
		1035	/* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */
		1036	/* not on e.g. EIO or EPIPE - sounds broken */
		1037	if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0)
639	res = sbytes;	1038	res = sbytes;
640	}	1039	#endif
		1040
		1041	/* according to source inspection, this is correct, and useful behaviour */
		1042	if (sbytes)
		1043	res = sbytes;
		1044
		1045	# elif defined (__APPLE__)
		1046	off_t sbytes = count;
		1047	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
		1048
		1049	/* according to the manpage, sbytes is always valid */
		1050	if (sbytes)
		1051	res = sbytes;
641		1052
642	# elif __hpux	1053	# elif __hpux
643	res = sendfile (ofd, ifd, offset, count, 0, 0);	1054	res = sendfile (ofd, ifd, offset, count, 0, 0);
644		1055
645	# elif __solaris	1056	# elif __solaris
646	{
647	struct sendfilevec vec;	1057	struct sendfilevec vec;
648	size_t sbytes;	1058	size_t sbytes;
649		1059
650	vec.sfv_fd = ifd;	1060	vec.sfv_fd = ifd;
651	vec.sfv_flag = 0;	1061	vec.sfv_flag = 0;
652	vec.sfv_off = offset;	1062	vec.sfv_off = offset;
653	vec.sfv_len = count;	1063	vec.sfv_len = count;
654		1064
655	res = sendfilev (ofd, &vec, 1, &sbytes);	1065	res = sendfilev (ofd, &vec, 1, &sbytes);
656		1066
657	if (res < 0 && sbytes)	1067	if (res < 0 && sbytes)
658	res = sbytes;	1068	res = sbytes;
659	}
660		1069
661	# endif	1070	# endif
		1071
		1072	#elif defined (_WIN32) && 0
		1073	/* does not work, just for documentation of what would need to be done */
		1074	/* actually, cannot be done like this, as TransmitFile changes the file offset, */
		1075	/* libeio guarantees that the file offset does not change, and windows */
		1076	/* has no way to get an independent handle to the same file description */
		1077	HANDLE h = TO_SOCKET (ifd);
		1078	SetFilePointer (h, offset, 0, FILE_BEGIN);
		1079	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
		1080
662	#else	1081	#else
663	res = -1;	1082	res = -1;
664	errno = ENOSYS;	1083	errno = ENOSYS;
665	#endif	1084	#endif
666		1085
		1086	/* we assume sendfile can copy at least 128mb in one go */
		1087	if (res <= 128 * 1024 * 1024)
		1088	{
		1089	if (res > 0)
		1090	written += res;
		1091
		1092	if (written)
		1093	return written;
		1094
		1095	break;
		1096	}
		1097	else
		1098	{
		1099	/* if we requested more, then probably the kernel was lazy */
		1100	written += res;
		1101	offset += res;
		1102	count -= res;
		1103
		1104	if (!count)
		1105	return written;
		1106	}
		1107	}
		1108
667	if (res < 0	1109	if (res < 0
668	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	1110	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		1111	/* BSDs */
		1112	#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */
		1113	|| errno == ENOTSUP
		1114	#endif
		1115	#ifdef EOPNOTSUPP /* windows */
		1116	|| errno == EOPNOTSUPP /* BSDs */
		1117	#endif
669	#if __solaris	1118	#if __solaris
670	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	1119	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
671	#endif	1120	#endif
672	)	1121	)
673	)	1122	)
…		…
677		1126
678	res = 0;	1127	res = 0;
679		1128
680	while (count)	1129	while (count)
681	{	1130	{
682	ssize_t cnt;	1131	eio_ssize_t cnt;
683		1132
684	cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);	1133	cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);
685		1134
686	if (cnt <= 0)	1135	if (cnt <= 0)
687	{	1136	{
…		…
699		1148
700	offset += cnt;	1149	offset += cnt;
701	res += cnt;	1150	res += cnt;
702	count -= cnt;	1151	count -= cnt;
703	}	1152	}
		1153
		1154	FUBd;
704	}	1155	}
705		1156
706	return res;	1157	return res;
707	}	1158	}
708		1159
		1160	#ifdef PAGESIZE
		1161	# define eio_pagesize() PAGESIZE
		1162	#else
		1163	static intptr_t
		1164	eio_pagesize (void)
		1165	{
		1166	static intptr_t page;
		1167
		1168	if (!page)
		1169	page = sysconf (_SC_PAGESIZE);
		1170
		1171	return page;
		1172	}
		1173	#endif
		1174
		1175	static void
		1176	eio_page_align (void **addr, size_t *length)
		1177	{
		1178	intptr_t mask = eio_pagesize () - 1;
		1179
		1180	/* round down addr */
		1181	intptr_t adj = mask & (intptr_t)*addr;
		1182
		1183	*addr = (void *)((intptr_t)*addr - adj);
		1184	*length += adj;
		1185
		1186	/* round up length */
		1187	*length = (*length + mask) & ~mask;
		1188	}
		1189
		1190	#if !_POSIX_MEMLOCK
		1191	# define eio__mlockall(a) EIO_ENOSYS ()
		1192	#else
		1193
		1194	static int
		1195	eio__mlockall (int flags)
		1196	{
		1197	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1198	extern int mallopt (int, int);
		1199	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1200	#endif
		1201
		1202	if (EIO_MCL_CURRENT != MCL_CURRENT
		1203	|| EIO_MCL_FUTURE != MCL_FUTURE)
		1204	{
		1205	flags = 0
		1206	| (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0)
		1207	| (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0);
		1208	}
		1209
		1210	return mlockall (flags);
		1211	}
		1212	#endif
		1213
		1214	#if !_POSIX_MEMLOCK_RANGE
		1215	# define eio__mlock(a,b) EIO_ENOSYS ()
		1216	#else
		1217
		1218	static int
		1219	eio__mlock (void *addr, size_t length)
		1220	{
		1221	eio_page_align (&addr, &length);
		1222
		1223	return mlock (addr, length);
		1224	}
		1225
		1226	#endif
		1227
		1228	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
		1229	# define eio__msync(a,b,c) EIO_ENOSYS ()
		1230	#else
		1231
		1232	static int
		1233	eio__msync (void *mem, size_t len, int flags)
		1234	{
		1235	eio_page_align (&mem, &len);
		1236
		1237	if (EIO_MS_ASYNC != MS_SYNC
		1238	|| EIO_MS_INVALIDATE != MS_INVALIDATE
		1239	|| EIO_MS_SYNC != MS_SYNC)
		1240	{
		1241	flags = 0
		1242	| (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
		1243	| (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
		1244	| (flags & EIO_MS_SYNC ? MS_SYNC : 0);
		1245	}
		1246
		1247	return msync (mem, len, flags);
		1248	}
		1249
		1250	#endif
		1251
		1252	static int
		1253	eio__mtouch (eio_req *req)
		1254	{
		1255	void *mem = req->ptr2;
		1256	size_t len = req->size;
		1257	int flags = req->int1;
		1258
		1259	eio_page_align (&mem, &len);
		1260
		1261	{
		1262	intptr_t addr = (intptr_t)mem;
		1263	intptr_t end = addr + len;
		1264	intptr_t page = eio_pagesize ();
		1265
		1266	if (addr < end)
		1267	if (flags & EIO_MT_MODIFY) /* modify */
		1268	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1269	else
		1270	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1271	}
		1272
		1273	return 0;
		1274	}
		1275
		1276	/*****************************************************************************/
		1277	/* requests implemented outside eio_execute, because they are so large */
		1278
		1279	static void
		1280	eio__realpath (eio_req *req, etp_worker *self)
		1281	{
		1282	char *rel = req->ptr1;
		1283	char *res;
		1284	char *tmp1, *tmp2;
		1285	#if SYMLOOP_MAX > 32
		1286	int symlinks = SYMLOOP_MAX;
		1287	#else
		1288	int symlinks = 32;
		1289	#endif
		1290
		1291	req->result = -1;
		1292
		1293	errno = EINVAL;
		1294	if (!rel)
		1295	return;
		1296
		1297	errno = ENOENT;
		1298	if (!*rel)
		1299	return;
		1300
		1301	if (!req->ptr2)
		1302	{
		1303	X_LOCK (wrklock);
		1304	req->flags |= EIO_FLAG_PTR2_FREE;
		1305	X_UNLOCK (wrklock);
		1306	req->ptr2 = malloc (PATH_MAX * 3);
		1307
		1308	errno = ENOMEM;
		1309	if (!req->ptr2)
		1310	return;
		1311	}
		1312
		1313	res = req->ptr2;
		1314	tmp1 = res + PATH_MAX;
		1315	tmp2 = tmp1 + PATH_MAX;
		1316
		1317	#if 0 /* disabled, the musl way to do things is just too racy */
		1318	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
		1319	/* on linux we may be able to ask the kernel */
		1320	{
		1321	int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME);
		1322
		1323	if (fd >= 0)
		1324	{
		1325	sprintf (tmp1, "/proc/self/fd/%d", fd);
		1326	req->result = readlink (tmp1, res, PATH_MAX);
		1327	close (fd);
		1328
		1329	/* here we should probably stat the open file and the disk file, to make sure they still match */
		1330
		1331	if (req->result > 0)
		1332	goto done;
		1333	}
		1334	else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)
		1335	return;
		1336	}
		1337	#endif
		1338	#endif
		1339
		1340	if (*rel != '/')
		1341	{
		1342	if (!getcwd (res, PATH_MAX))
		1343	return;
		1344
		1345	if (res [1]) /* only use if not / */
		1346	res += strlen (res);
		1347	}
		1348
		1349	while (*rel)
		1350	{
		1351	eio_ssize_t len, linklen;
		1352	char *beg = rel;
		1353
		1354	while (*rel && *rel != '/')
		1355	++rel;
		1356
		1357	len = rel - beg;
		1358
		1359	if (!len) /* skip slashes */
		1360	{
		1361	++rel;
		1362	continue;
		1363	}
		1364
		1365	if (beg [0] == '.')
		1366	{
		1367	if (len == 1)
		1368	continue; /* . - nop */
		1369
		1370	if (beg [1] == '.' && len == 2)
		1371	{
		1372	/* .. - back up one component, if possible */
		1373
		1374	while (res != req->ptr2)
		1375	if (*--res == '/')
		1376	break;
		1377
		1378	continue;
		1379	}
		1380	}
		1381
		1382	errno = ENAMETOOLONG;
		1383	if (res + 1 + len + 1 >= tmp1)
		1384	return;
		1385
		1386	/* copy one component */
		1387	*res = '/';
		1388	memcpy (res + 1, beg, len);
		1389
		1390	/* zero-terminate, for readlink */
		1391	res [len + 1] = 0;
		1392
		1393	/* now check if it's a symlink */
		1394	linklen = readlink (req->ptr2, tmp1, PATH_MAX);
		1395
		1396	if (linklen < 0)
		1397	{
		1398	if (errno != EINVAL)
		1399	return;
		1400
		1401	/* it's a normal directory. hopefully */
		1402	res += len + 1;
		1403	}
		1404	else
		1405	{
		1406	/* yay, it was a symlink - build new path in tmp2 */
		1407	int rellen = strlen (rel);
		1408
		1409	errno = ENAMETOOLONG;
		1410	if (linklen + 1 + rellen >= PATH_MAX)
		1411	return;
		1412
		1413	errno = ELOOP;
		1414	if (!--symlinks)
		1415	return;
		1416
		1417	if (*tmp1 == '/')
		1418	res = req->ptr2; /* symlink resolves to an absolute path */
		1419
		1420	/* we need to be careful, as rel might point into tmp2 already */
		1421	memmove (tmp2 + linklen + 1, rel, rellen + 1);
		1422	tmp2 [linklen] = '/';
		1423	memcpy (tmp2, tmp1, linklen);
		1424
		1425	rel = tmp2;
		1426	}
		1427	}
		1428
		1429	/* special case for the lone root path */
		1430	if (res == req->ptr2)
		1431	*res++ = '/';
		1432
		1433	req->result = res - (char *)req->ptr2;
		1434
		1435	done:
		1436	req->ptr2 = realloc (req->ptr2, req->result); /* trade time for space savings */
		1437	}
		1438
		1439	static signed char
		1440	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
		1441	{
		1442	return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */
		1443	: a->inode < b->inode ? -1
		1444	: a->inode > b->inode ? 1
		1445	: 0;
		1446	}
		1447
		1448	#define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0
		1449
		1450	#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */
		1451	#define EIO_SORT_FAST 60 /* when to only use insertion sort */
		1452
		1453	static void
		1454	eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits)
		1455	{
		1456	unsigned char bits [9 + sizeof (eio_ino_t) * 8];
		1457	unsigned char *bit = bits;
		1458
		1459	assert (CHAR_BIT == 8);
		1460	assert (sizeof (eio_dirent) * 8 < 256);
		1461	assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */
		1462	assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */
		1463
		1464	if (size <= EIO_SORT_FAST)
		1465	return;
		1466
		1467	/* first prepare an array of bits to test in our radix sort */
		1468	/* try to take endianness into account, as well as differences in eio_ino_t sizes */
		1469	/* inode_bits must contain all inodes ORed together */
		1470	/* which is used to skip bits that are 0 everywhere, which is very common */
		1471	{
		1472	eio_ino_t endianness;
		1473	int i, j;
		1474
		1475	/* we store the byte offset of byte n into byte n of "endianness" */
		1476	for (i = 0; i < sizeof (eio_ino_t); ++i)
		1477	((unsigned char *)&endianness)[i] = i;
		1478
		1479	*bit++ = 0;
		1480
		1481	for (i = 0; i < sizeof (eio_ino_t); ++i)
		1482	{
		1483	/* shifting off the byte offsets out of "endianness" */
		1484	int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8;
		1485	endianness >>= 8;
		1486
		1487	for (j = 0; j < 8; ++j)
		1488	if (inode_bits & (((eio_ino_t)1) << (i * 8 + j)))
		1489	*bit++ = offs + j;
		1490	}
		1491
		1492	for (j = 0; j < 8; ++j)
		1493	if (score_bits & (1 << j))
		1494	*bit++ = offsetof (eio_dirent, score) * 8 + j;
		1495	}
		1496
		1497	/* now actually do the sorting (a variant of MSD radix sort) */
		1498	{
		1499	eio_dirent *base_stk [9 + sizeof (eio_ino_t) * 8], *base;
		1500	eio_dirent *end_stk [9 + sizeof (eio_ino_t) * 8], *end;
		1501	unsigned char *bit_stk [9 + sizeof (eio_ino_t) * 8];
		1502	int stk_idx = 0;
		1503
		1504	base_stk [stk_idx] = dents;
		1505	end_stk [stk_idx] = dents + size;
		1506	bit_stk [stk_idx] = bit - 1;
		1507
		1508	do
		1509	{
		1510	base = base_stk [stk_idx];
		1511	end = end_stk [stk_idx];
		1512	bit = bit_stk [stk_idx];
		1513
		1514	for (;;)
		1515	{
		1516	unsigned char O = *bit >> 3;
		1517	unsigned char M = 1 << (*bit & 7);
		1518
		1519	eio_dirent *a = base;
		1520	eio_dirent *b = end;
		1521
		1522	if (b - a < EIO_SORT_CUTOFF)
		1523	break;
		1524
		1525	/* now bit-partition the array on the bit */
		1526	/* this ugly asymmetric loop seems to perform much better than typical */
		1527	/* partition algos found in the literature */
		1528	do
		1529	if (!(((unsigned char *)a)[O] & M))
		1530	++a;
		1531	else if (!(((unsigned char *)--b)[O] & M))
		1532	{
		1533	eio_dirent tmp = *a; *a = *b; *b = tmp;
		1534	++a;
		1535	}
		1536	while (b > a);
		1537
		1538	/* next bit, or stop, if no bits left in this path */
		1539	if (!*--bit)
		1540	break;
		1541
		1542	base_stk [stk_idx] = a;
		1543	end_stk [stk_idx] = end;
		1544	bit_stk [stk_idx] = bit;
		1545	++stk_idx;
		1546
		1547	end = a;
		1548	}
		1549	}
		1550	while (stk_idx--);
		1551	}
		1552	}
		1553
		1554	static void
		1555	eio_dent_insertion_sort (eio_dirent *dents, int size)
		1556	{
		1557	/* first move the smallest element to the front, to act as a sentinel */
		1558	{
		1559	int i;
		1560	eio_dirent *min = dents;
		1561
		1562	/* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */
		1563	for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; )
		1564	if (EIO_DENT_CMP (dents [i], <, *min))
		1565	min = &dents [i];
		1566
		1567	/* swap elements 0 and j (minimum) */
		1568	{
		1569	eio_dirent tmp = *dents; *dents = *min; *min = tmp;
		1570	}
		1571	}
		1572
		1573	/* then do standard insertion sort, assuming that all elements are >= dents [0] */
		1574	{
		1575	eio_dirent *i, *j;
		1576
		1577	for (i = dents + 1; i < dents + size; ++i)
		1578	{
		1579	eio_dirent value = *i;
		1580
		1581	for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j)
		1582	j [1] = j [0];
		1583
		1584	j [1] = value;
		1585	}
		1586	}
		1587	}
		1588
		1589	static void
		1590	eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits)
		1591	{
		1592	if (size <= 1)
		1593	return; /* our insertion sort relies on size > 0 */
		1594
		1595	/* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */
		1596	/* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */
		1597	eio_dent_radix_sort (dents, size, score_bits, inode_bits);
		1598
		1599	/* use an insertion sort at the end, or for small arrays, */
		1600	/* as insertion sort is more efficient for small partitions */
		1601	eio_dent_insertion_sort (dents, size);
		1602	}
		1603
709	/* read a full directory */	1604	/* read a full directory */
		1605	static void
710	static void scandir_ (eio_req *req, worker *self)	1606	eio__scandir (eio_req *req, etp_worker *self)
711	{	1607	{
		1608	char *name, *names;
		1609	int namesalloc = 4096 - sizeof (void *) * 4;
		1610	int namesoffs = 0;
		1611	int flags = req->int1;
		1612	eio_dirent *dents = 0;
		1613	int dentalloc = 128;
		1614	int dentoffs = 0;
		1615	eio_ino_t inode_bits = 0;
		1616	#ifdef _WIN32
		1617	HANDLE dirp;
		1618	WIN32_FIND_DATA entp;
		1619	#else
712	DIR *dirp;	1620	DIR *dirp;
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;	1621	EIO_STRUCT_DIRENT *entp;
719	char *name, *names;	1622	#endif
720	int memlen = 4096;
721	int memofs = 0;
722	int res = 0;
723		1623
724	X_LOCK (wrklock);	1624	req->result = -1;
		1625
		1626	if (!(flags & EIO_READDIR_DENTS))
		1627	flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
		1628
		1629	#ifdef _WIN32
		1630	{
		1631	int len = strlen ((const char *)req->ptr1);
		1632	char *path = malloc (MAX_PATH);
		1633	const char *fmt;
		1634
		1635	if (!len)
		1636	fmt = "./*";
		1637	else if (((const char *)req->ptr1)[len - 1] == '/' || ((const char *)req->ptr1)[len - 1] == '\\')
		1638	fmt = "%s*";
		1639	else
		1640	fmt = "%s/*";
		1641
		1642	_snprintf (path, MAX_PATH, fmt, (const char *)req->ptr1);
		1643	dirp = FindFirstFile (path, &entp);
		1644	free (path);
		1645
		1646	if (dirp == INVALID_HANDLE_VALUE)
		1647	{
		1648	dirp = 0;
		1649
		1650	switch (GetLastError ())
		1651	{
		1652	case ERROR_FILE_NOT_FOUND:
		1653	req->result = 0;
		1654	break;
		1655
		1656	case ERROR_INVALID_NAME:
		1657	case ERROR_PATH_NOT_FOUND:
		1658	case ERROR_NO_MORE_FILES:
		1659	errno = ENOENT;
		1660	break;
		1661
		1662	case ERROR_NOT_ENOUGH_MEMORY:
		1663	errno = ENOMEM;
		1664	break;
		1665
		1666	default:
		1667	errno = EINVAL;
		1668	break;
		1669	}
		1670	}
		1671	}
		1672	#else
725	self->dirp = dirp = opendir (req->ptr1);	1673	dirp = opendir (req->ptr1);
726	self->dbuf = u = malloc (sizeof (*u));	1674	#endif
		1675
727	req->flags |= EIO_FLAG_PTR2_FREE;	1676	if (req->flags & EIO_FLAG_PTR1_FREE)
		1677	free (req->ptr1);
		1678
		1679	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
		1680	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
728	req->ptr2 = names = malloc (memlen);	1681	req->ptr2 = names = malloc (namesalloc);
729	X_UNLOCK (wrklock);
730		1682
731	if (dirp && u && names)	1683	if (dirp && names && (!flags || dents))
732	for (;;)	1684	for (;;)
733	{	1685	{
		1686	int done;
		1687
		1688	#ifdef _WIN32
		1689	done = !dirp;
		1690	#else
734	errno = 0;	1691	errno = 0;
735	readdir_r (dirp, &u->d, &entp);	1692	entp = readdir (dirp);
		1693	done = !entp;
		1694	#endif
736		1695
737	if (!entp)	1696	if (done)
		1697	{
		1698	#ifndef _WIN32
		1699	int old_errno = errno;
		1700	closedir (dirp);
		1701	errno = old_errno;
		1702
		1703	if (errno)
		1704	break;
		1705	#endif
		1706
		1707	/* sort etc. */
		1708	req->int1 = flags;
		1709	req->result = dentoffs;
		1710
		1711	if (flags & EIO_READDIR_STAT_ORDER)
		1712	eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits);
		1713	else if (flags & EIO_READDIR_DIRS_FIRST)
		1714	if (flags & EIO_READDIR_FOUND_UNKNOWN)
		1715	eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */
		1716	else
		1717	{
		1718	/* in this case, all is known, and we just put dirs first and sort them */
		1719	eio_dirent *oth = dents + dentoffs;
		1720	eio_dirent *dir = dents;
		1721
		1722	/* now partition dirs to the front, and non-dirs to the back */
		1723	/* by walking from both sides and swapping if necessary */
		1724	while (oth > dir)
		1725	{
		1726	if (dir->type == EIO_DT_DIR)
		1727	++dir;
		1728	else if ((--oth)->type == EIO_DT_DIR)
		1729	{
		1730	eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
		1731
		1732	++dir;
		1733	}
		1734	}
		1735
		1736	/* now sort the dirs only (dirs all have the same score) */
		1737	eio_dent_sort (dents, dir - dents, 0, inode_bits);
		1738	}
		1739
738	break;	1740	break;
		1741	}
739		1742
740	name = entp->d_name;	1743	/* now add the entry to our list(s) */
		1744	name = D_NAME (entp);
741		1745
		1746	/* skip . and .. entries */
742	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	1747	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
743	{	1748	{
744	int len = strlen (name) + 1;	1749	int len = D_NAMLEN (entp) + 1;
745		1750
746	res++;	1751	while (ecb_expect_false (namesoffs + len > namesalloc))
747
748	while (memofs + len > memlen)
749	{	1752	{
750	memlen *= 2;	1753	namesalloc *= 2;
751	X_LOCK (wrklock);
752	req->ptr2 = names = realloc (names, memlen);	1754	req->ptr2 = names = realloc (names, namesalloc);
753	X_UNLOCK (wrklock);
754		1755
755	if (!names)	1756	if (!names)
756	break;	1757	break;
757	}	1758	}
758		1759
759	memcpy (names + memofs, name, len);	1760	memcpy (names + namesoffs, name, len);
		1761
		1762	if (dents)
		1763	{
		1764	struct eio_dirent *ent;
		1765
		1766	if (ecb_expect_false (dentoffs == dentalloc))
		1767	{
		1768	dentalloc *= 2;
		1769	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
		1770
		1771	if (!dents)
		1772	break;
		1773	}
		1774
		1775	ent = dents + dentoffs;
		1776
		1777	ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
		1778	ent->namelen = len - 1;
		1779	ent->inode = D_INO (entp);
		1780
		1781	inode_bits |= ent->inode;
		1782
		1783	switch (D_TYPE (entp))
		1784	{
		1785	default:
		1786	ent->type = EIO_DT_UNKNOWN;
		1787	flags |= EIO_READDIR_FOUND_UNKNOWN;
		1788	break;
		1789
		1790	#ifdef DT_FIFO
		1791	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
		1792	#endif
		1793	#ifdef DT_CHR
		1794	case DT_CHR: ent->type = EIO_DT_CHR; break;
		1795	#endif
		1796	#ifdef DT_MPC
		1797	case DT_MPC: ent->type = EIO_DT_MPC; break;
		1798	#endif
		1799	#ifdef DT_DIR
		1800	case DT_DIR: ent->type = EIO_DT_DIR; break;
		1801	#endif
		1802	#ifdef DT_NAM
		1803	case DT_NAM: ent->type = EIO_DT_NAM; break;
		1804	#endif
		1805	#ifdef DT_BLK
		1806	case DT_BLK: ent->type = EIO_DT_BLK; break;
		1807	#endif
		1808	#ifdef DT_MPB
		1809	case DT_MPB: ent->type = EIO_DT_MPB; break;
		1810	#endif
		1811	#ifdef DT_REG
		1812	case DT_REG: ent->type = EIO_DT_REG; break;
		1813	#endif
		1814	#ifdef DT_NWK
		1815	case DT_NWK: ent->type = EIO_DT_NWK; break;
		1816	#endif
		1817	#ifdef DT_CMP
		1818	case DT_CMP: ent->type = EIO_DT_CMP; break;
		1819	#endif
		1820	#ifdef DT_LNK
		1821	case DT_LNK: ent->type = EIO_DT_LNK; break;
		1822	#endif
		1823	#ifdef DT_SOCK
		1824	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
		1825	#endif
		1826	#ifdef DT_DOOR
		1827	case DT_DOOR: ent->type = EIO_DT_DOOR; break;
		1828	#endif
		1829	#ifdef DT_WHT
		1830	case DT_WHT: ent->type = EIO_DT_WHT; break;
		1831	#endif
		1832	}
		1833
		1834	ent->score = 7;
		1835
		1836	if (flags & EIO_READDIR_DIRS_FIRST)
		1837	{
		1838	if (ent->type == EIO_DT_UNKNOWN)
		1839	{
		1840	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
		1841	ent->score = 1;
		1842	else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */
		1843	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
		1844	}
		1845	else if (ent->type == EIO_DT_DIR)
		1846	ent->score = 0;
		1847	}
		1848	}
		1849
760	memofs += len;	1850	namesoffs += len;
		1851	++dentoffs;
761	}	1852	}
		1853
		1854	if (EIO_CANCELLED (req))
		1855	{
		1856	errno = ECANCELED;
		1857	break;
		1858	}
		1859
		1860	#ifdef _WIN32
		1861	if (!FindNextFile (dirp, &entp))
		1862	{
		1863	FindClose (dirp);
		1864	dirp = 0;
		1865	}
		1866	#endif
762	}	1867	}
763
764	if (errno)
765	res = -1;
766
767	req->result = res;
768	}	1868	}
769		1869
770	/*****************************************************************************/	1870	/*****************************************************************************/
771		1871
772	#define ALLOC(len) \	1872	#define ALLOC(len) \
…		…
782	req->result = -1; \	1882	req->result = -1; \
783	break; \	1883	break; \
784	} \	1884	} \
785	}	1885	}
786		1886
787	X_THREAD_PROC (eio_proc)	1887	X_THREAD_PROC (etp_proc)
788	{	1888	{
789	eio_req *req;	1889	ETP_REQ *req;
790	struct timespec ts;	1890	struct timespec ts;
791	worker *self = (worker *)thr_arg;	1891	etp_worker *self = (etp_worker *)thr_arg;
792		1892
793	/* try to distribute timeouts somewhat randomly */	1893	/* try to distribute timeouts somewhat evenly */
794	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1894	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
795		1895
796	for (;;)	1896	for (;;)
797	{	1897	{
798	ts.tv_sec = time (0) + IDLE_TIMEOUT;	1898	ts.tv_sec = 0;
799		1899
800	X_LOCK (reqlock);	1900	X_LOCK (reqlock);
801		1901
802	for (;;)	1902	for (;;)
803	{	1903	{
804	self->req = req = reqq_shift (&req_queue);	1904	self->req = req = reqq_shift (&req_queue);
805		1905
806	if (req)	1906	if (req)
807	break;	1907	break;
808		1908
		1909	if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */
		1910	{
		1911	X_UNLOCK (reqlock);
		1912	X_LOCK (wrklock);
		1913	--started;
		1914	X_UNLOCK (wrklock);
		1915	goto quit;
		1916	}
		1917
809	++idle;	1918	++idle;
810		1919
811	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1920	if (idle <= max_idle)
		1921	/* we are allowed to idle, so do so without any timeout */
		1922	X_COND_WAIT (reqwait, reqlock);
		1923	else
812	{	1924	{
813	if (idle > max_idle)	1925	/* initialise timeout once */
814	{	1926	if (!ts.tv_sec)
815	--idle;	1927	ts.tv_sec = time (0) + idle_timeout;
816	X_UNLOCK (reqlock);
817	X_LOCK (wrklock);
818	--started;
819	X_UNLOCK (wrklock);
820	goto quit;
821	}
822		1928
823	/* we are allowed to idle, so do so without any timeout */
824	X_COND_WAIT (reqwait, reqlock);	1929	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
825	ts.tv_sec = time (0) + IDLE_TIMEOUT;	1930	ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */
826	}	1931	}
827		1932
828	--idle;	1933	--idle;
829	}	1934	}
830		1935
831	--nready;	1936	--nready;
832		1937
833	X_UNLOCK (reqlock);	1938	X_UNLOCK (reqlock);
834		1939
835	errno = 0; /* strictly unnecessary */
836
837	if (!EIO_CANCELLED (req))
838	switch (req->type)	1940	if (req->type < 0)
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;	1941	goto quit;
930		1942
931	default:	1943	ETP_EXECUTE (self, req);
932	req->result = -1;
933	break;
934	}
935
936	req->errorno = errno;
937		1944
938	X_LOCK (reslock);	1945	X_LOCK (reslock);
939		1946
940	++npending;	1947	++npending;
941		1948
942	if (!reqq_push (&res_queue, req) && want_poll_cb)	1949	if (!reqq_push (&res_queue, req) && want_poll_cb)
943	want_poll_cb ();	1950	want_poll_cb ();
944		1951
945	self->req = 0;	1952	self->req = 0;
946	worker_clear (self);	1953	etp_worker_clear (self);
947		1954
948	X_UNLOCK (reslock);	1955	X_UNLOCK (reslock);
949	}	1956	}
950		1957
951	quit:	1958	quit:
952	X_LOCK (wrklock);	1959	X_LOCK (wrklock);
953	worker_free (self);	1960	etp_worker_free (self);
954	X_UNLOCK (wrklock);	1961	X_UNLOCK (wrklock);
955		1962
956	return 0;	1963	return 0;
957	}	1964	}
958		1965
959	/*****************************************************************************/	1966	/*****************************************************************************/
960		1967
961	static void eio_atfork_prepare (void)	1968	int ecb_cold
		1969	eio_init (void (*want_poll)(void), void (*done_poll)(void))
962	{	1970	{
963	X_LOCK (wrklock);
964	X_LOCK (reqlock);
965	X_LOCK (reslock);
966	#if !HAVE_PREADWRITE	1971	#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))
1018	{
1019	want_poll_cb = want_poll;
1020	done_poll_cb = done_poll;
1021
1022	#ifdef _WIN32
1023	X_MUTEX_CHECK (wrklock);
1024	X_MUTEX_CHECK (reslock);
1025	X_MUTEX_CHECK (reqlock);
1026	X_MUTEX_CHECK (reqwait);
1027	X_MUTEX_CHECK (preadwritelock);	1972	X_MUTEX_CREATE (preadwritelock);
1028	X_MUTEX_CHECK (readdirlock);
1029
1030	X_COND_CHECK (reqwait);
1031	#endif	1973	#endif
1032		1974
1033	X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);	1975	return etp_init (want_poll, done_poll);
1034	}	1976	}
1035		1977
		1978	ecb_inline void
1036	static void eio_api_destroy (eio_req *req)	1979	eio_api_destroy (eio_req *req)
1037	{	1980	{
1038	free (req);	1981	free (req);
1039	}	1982	}
1040		1983
1041	#define REQ(rtype) \	1984	#define REQ(rtype) \
…		…
1043	\	1986	\
1044	req = (eio_req *)calloc (1, sizeof *req); \	1987	req = (eio_req *)calloc (1, sizeof *req); \
1045	if (!req) \	1988	if (!req) \
1046	return 0; \	1989	return 0; \
1047	\	1990	\
1048	req->type = EIO_ ## rtype; \	1991	req->type = rtype; \
1049	req->pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \	1992	req->pri = pri; \
1050	req->finish = cb; \	1993	req->finish = cb; \
		1994	req->data = data; \
1051	req->destroy = eio_api_destroy;	1995	req->destroy = eio_api_destroy;
1052		1996
1053	#define SEND eio_submit (req); return req	1997	#define SEND eio_submit (req); return req
1054		1998
1055	#define PATH (void)0	1999	#define PATH \
		2000	req->flags |= EIO_FLAG_PTR1_FREE; \
		2001	req->ptr1 = strdup (path); \
		2002	if (!req->ptr1) \
		2003	{ \
		2004	eio_api_destroy (req); \
		2005	return 0; \
		2006	}
1056		2007
		2008	static void
		2009	eio_execute (etp_worker *self, eio_req *req)
		2010	{
		2011	if (ecb_expect_false (EIO_CANCELLED (req)))
		2012	{
		2013	req->result = -1;
		2014	req->errorno = ECANCELED;
		2015	return;
		2016	}
		2017
		2018	switch (req->type)
		2019	{
		2020	case EIO_READ: ALLOC (req->size);
		2021	req->result = req->offs >= 0
		2022	? pread (req->int1, req->ptr2, req->size, req->offs)
		2023	: read (req->int1, req->ptr2, req->size); break;
		2024	case EIO_WRITE: req->result = req->offs >= 0
		2025	? pwrite (req->int1, req->ptr2, req->size, req->offs)
		2026	: write (req->int1, req->ptr2, req->size); break;
		2027
		2028	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		2029	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size); break;
		2030
		2031	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		2032	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		2033	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		2034	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		2035	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		2036	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
		2037
		2038	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		2039	req->result = statvfs (req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
		2040	case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		2041	req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
		2042
		2043	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		2044	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		2045	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
		2046	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
		2047	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		2048	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
		2049
		2050	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
		2051	case EIO_CLOSE: req->result = close (req->int1); break;
		2052	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
		2053	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
		2054	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
		2055	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
		2056	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
		2057	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
		2058	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
		2059	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
		2060
		2061	case EIO_REALPATH: eio__realpath (req, self); break;
		2062
		2063	case EIO_READLINK: ALLOC (PATH_MAX);
		2064	req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break;
		2065
		2066	case EIO_SYNC: req->result = 0; sync (); break;
		2067	case EIO_FSYNC: req->result = fsync (req->int1); break;
		2068	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		2069	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
		2070	case EIO_MTOUCH: req->result = eio__mtouch (req); break;
		2071	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
		2072	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
		2073	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
		2074	case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;
		2075
		2076	case EIO_READDIR: eio__scandir (req, self); break;
		2077
		2078	case EIO_BUSY:
		2079	#ifdef _WIN32
		2080	Sleep (req->nv1 * 1e3);
		2081	#else
		2082	{
		2083	struct timeval tv;
		2084
		2085	tv.tv_sec = req->nv1;
		2086	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6;
		2087
		2088	req->result = select (0, 0, 0, 0, &tv);
		2089	}
		2090	#endif
		2091	break;
		2092
		2093	case EIO_UTIME:
		2094	case EIO_FUTIME:
		2095	{
		2096	struct timeval tv[2];
		2097	struct timeval *times;
		2098
		2099	if (req->nv1 != -1. || req->nv2 != -1.)
		2100	{
		2101	tv[0].tv_sec = req->nv1;
		2102	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		2103	tv[1].tv_sec = req->nv2;
		2104	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		2105
		2106	times = tv;
		2107	}
		2108	else
		2109	times = 0;
		2110
		2111	req->result = req->type == EIO_FUTIME
		2112	? futimes (req->int1, times)
		2113	: utimes (req->ptr1, times);
		2114	}
		2115	break;
		2116
		2117	case EIO_GROUP:
		2118	abort (); /* handled in eio_request */
		2119
		2120	case EIO_NOP:
		2121	req->result = 0;
		2122	break;
		2123
		2124	case EIO_CUSTOM:
		2125	req->feed (req);
		2126	break;
		2127
		2128	default:
		2129	errno = ENOSYS;
		2130	req->result = -1;
		2131	break;
		2132	}
		2133
		2134	req->errorno = errno;
		2135	}
		2136
		2137	#ifndef EIO_NO_WRAPPERS
		2138
		2139	eio_req *eio_nop (int pri, eio_cb cb, void *data)
		2140	{
		2141	REQ (EIO_NOP); SEND;
		2142	}
		2143
		2144	eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
		2145	{
		2146	REQ (EIO_BUSY); req->nv1 = delay; SEND;
		2147	}
		2148
1057	eio_req *eio_fsync (int fd, eio_cb cb)	2149	eio_req *eio_sync (int pri, eio_cb cb, void *data)
1058	{	2150	{
		2151	REQ (EIO_SYNC); SEND;
		2152	}
		2153
		2154	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
		2155	{
1059	REQ (FSYNC); req->int1 = fd; SEND;	2156	REQ (EIO_FSYNC); req->int1 = fd; SEND;
1060	}	2157	}
1061		2158
		2159	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		2160	{
		2161	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		2162	}
		2163
		2164	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		2165	{
		2166	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		2167	}
		2168
		2169	eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data)
		2170	{
		2171	REQ (EIO_MLOCK); req->ptr2 = addr; req->size = length; SEND;
		2172	}
		2173
		2174	eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)
		2175	{
		2176	REQ (EIO_MLOCKALL); req->int1 = flags; SEND;
		2177	}
		2178
		2179	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
		2180	{
		2181	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
		2182	}
		2183
		2184	eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)
		2185	{
		2186	REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;
		2187	}
		2188
1062	eio_req *eio_fdatasync (int fd, eio_cb cb)	2189	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1063	{	2190	{
1064	REQ (FDATASYNC); req->int1 = fd; SEND;	2191	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
1065	}	2192	}
1066		2193
		2194	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
		2195	{
		2196	REQ (EIO_CLOSE); req->int1 = fd; SEND;
		2197	}
		2198
1067	eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb)	2199	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
1068	{	2200	{
1069	REQ (READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;	2201	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
1070	}	2202	}
1071		2203
1072	eio_req *eio_read (int fd, off_t offset, size_t length, void *data, eio_cb cb)	2204	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
1073	{	2205	{
1074	REQ (READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND;	2206	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1075	}	2207	}
1076		2208
1077	eio_req *eio_write (int fd, off_t offset, size_t length, void *data, eio_cb cb)	2209	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
1078	{	2210	{
1079	REQ (WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND;	2211	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1080	}	2212	}
1081		2213
1082	eio_req *eio_fstat (int fd, eio_cb cb)	2214	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
1083	{	2215	{
1084	REQ (FSTAT); req->int1 = fd; SEND;	2216	REQ (EIO_FSTAT); req->int1 = fd; SEND;
1085	}	2217	}
1086		2218
		2219	eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data)
		2220	{
		2221	REQ (EIO_FSTATVFS); req->int1 = fd; SEND;
		2222	}
		2223
1087	eio_req *eio_futime (int fd, double atime, double mtime, eio_cb cb)	2224	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
1088	{	2225	{
1089	REQ (FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;	2226	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
1090	}	2227	}
1091		2228
1092	eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb)	2229	eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
1093	{	2230	{
1094	REQ (FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;	2231	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
1095	}	2232	}
1096		2233
1097	eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb)	2234	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
1098	{	2235	{
1099	REQ (FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;	2236	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
1100	}	2237	}
1101		2238
1102	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb)	2239	eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
1103	{	2240	{
1104	REQ (FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	2241	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1105	}	2242	}
1106		2243
1107	eio_req *eio_dup2 (int fd, int fd2, eio_cb cb)	2244	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
1108	{	2245	{
1109	REQ (DUP2); req->int1 = fd; req->int2 = fd2; SEND;	2246	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
1110	}	2247	}
1111		2248
1112	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb)	2249	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	{	2250	{
1114	REQ (SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;	2251	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
1115	}	2252	}
1116		2253
1117	eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb)	2254	eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
1118	{	2255	{
1119	REQ (OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;	2256	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
1120	}	2257	}
1121		2258
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)	2259	eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
1138	{	2260	{
1139	REQ (UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;	2261	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
1140	}	2262	}
1141		2263
1142	eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb)	2264	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
1143	{	2265	{
1144	REQ (TRUNCATE); PATH; req->offs = offset; SEND;	2266	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
1145	}	2267	}
1146		2268
1147	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb)	2269	eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
1148	{	2270	{
1149	REQ (CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	2271	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1150	}	2272	}
1151		2273
1152	eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb)	2274	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1153	{	2275	{
1154	REQ (CHMOD); PATH; req->int2 = (long)mode; SEND;	2276	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
1155	}	2277	}
1156		2278
1157	eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb)	2279	eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1158	{	2280	{
1159	REQ (MKDIR); PATH; req->int2 = (long)mode; SEND;	2281	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
1160	}	2282	}
1161		2283
1162	eio_req *eio_unlink (const char *path, eio_cb cb)	2284	static eio_req *
		2285	eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
1163	{	2286	{
1164	REQ (UNLINK); PATH; SEND;
1165	}
1166
1167	eio_req *eio_rmdir (const char *path, eio_cb cb)
1168	{
1169	REQ (RMDIR); PATH; SEND;	2287	REQ (type); PATH; SEND;
1170	}	2288	}
1171		2289
		2290	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
		2291	{
		2292	return eio__1path (EIO_READLINK, path, pri, cb, data);
		2293	}
		2294
		2295	eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data)
		2296	{
		2297	return eio__1path (EIO_REALPATH, path, pri, cb, data);
		2298	}
		2299
		2300	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
		2301	{
		2302	return eio__1path (EIO_STAT, path, pri, cb, data);
		2303	}
		2304
		2305	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
		2306	{
		2307	return eio__1path (EIO_LSTAT, path, pri, cb, data);
		2308	}
		2309
		2310	eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data)
		2311	{
		2312	return eio__1path (EIO_STATVFS, path, pri, cb, data);
		2313	}
		2314
		2315	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
		2316	{
		2317	return eio__1path (EIO_UNLINK, path, pri, cb, data);
		2318	}
		2319
1172	eio_req *eio_readdir (const char *path, eio_cb cb)	2320	eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
1173	{	2321	{
1174	REQ (READDIR); PATH; SEND;	2322	return eio__1path (EIO_RMDIR, path, pri, cb, data);
1175	}	2323	}
1176		2324
		2325	eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data)
		2326	{
		2327	REQ (EIO_READDIR); PATH; req->int1 = flags; SEND;
		2328	}
		2329
1177	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb)	2330	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
1178	{	2331	{
1179	REQ (MKNOD); PATH; req->int2 = (long)mode; req->int2 = (long)dev; SEND;	2332	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND;
1180	}	2333	}
1181		2334
1182	eio_req *eio_busy (double delay, eio_cb cb)	2335	static eio_req *
		2336	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1183	{	2337	{
1184	REQ (BUSY); req->nv1 = delay; SEND;	2338	REQ (type); PATH;
1185	}
1186		2339
		2340	req->flags |= EIO_FLAG_PTR2_FREE;
		2341	req->ptr2 = strdup (new_path);
		2342	if (!req->ptr2)
		2343	{
		2344	eio_api_destroy (req);
		2345	return 0;
		2346	}
		2347
		2348	SEND;
		2349	}
		2350
		2351	eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2352	{
		2353	return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
		2354	}
		2355
		2356	eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2357	{
		2358	return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
		2359	}
		2360
		2361	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2362	{
		2363	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
		2364	}
		2365
		2366	eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data)
		2367	{
		2368	REQ (EIO_CUSTOM); req->feed = execute; SEND;
		2369	}
		2370
		2371	#endif
		2372
1187	eio_req *eio_nop (eio_cb cb)	2373	eio_req *eio_grp (eio_cb cb, void *data)
1188	{	2374	{
		2375	const int pri = EIO_PRI_MAX;
		2376
1189	REQ (NOP); SEND;	2377	REQ (EIO_GROUP); SEND;
1190	}	2378	}
1191		2379
1192	#undef REQ	2380	#undef REQ
1193	#undef PATH	2381	#undef PATH
1194	#undef SEND	2382	#undef SEND
1195		2383
1196	#if 0	2384	/*****************************************************************************/
		2385	/* grp functions */
1197		2386
1198	void	2387	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)	2388	eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1572	{	2389	{
1573	grp->int2 = limit;	2390	grp->int2 = limit;
1574	grp->feed = feed;	2391	grp->feed = feed;
1575		2392
1576	grp_try_feed (grp);	2393	grp_try_feed (grp);
1577	}	2394	}
1578		2395
		2396	void
1579	void eio_grp_limit (eio_req *grp, int limit)	2397	eio_grp_limit (eio_req *grp, int limit)
1580	{	2398	{
1581	grp->int2 = limit;	2399	grp->int2 = limit;
1582		2400
1583	grp_try_feed (grp);	2401	grp_try_feed (grp);
1584	}	2402	}
1585		2403
		2404	void
1586	void eio_grp_add (eio_req *grp, eio_req *req)	2405	eio_grp_add (eio_req *grp, eio_req *req)
1587	{	2406	{
1588	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	2407	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
		2408
		2409	grp->flags |= EIO_FLAG_GROUPADD;
1589		2410
1590	++grp->size;	2411	++grp->size;
1591	req->grp = grp;	2412	req->grp = grp;
1592		2413
1593	req->grp_prev = 0;	2414	req->grp_prev = 0;
…		…
1597	grp->grp_first->grp_prev = req;	2418	grp->grp_first->grp_prev = req;
1598		2419
1599	grp->grp_first = req;	2420	grp->grp_first = req;
1600	}	2421	}
1601		2422
		2423	/*****************************************************************************/
		2424	/* misc garbage */
1602		2425
		2426	eio_ssize_t
		2427	eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
		2428	{
		2429	return eio__sendfile (ofd, ifd, offset, count);
		2430	}
		2431

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