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Comparing libeio/eio.c (file contents):
Revision 1.2 by root, Sat May 10 23:33:40 2008 UTC vs.
Revision 1.95 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
6	#include "EXTERN.h"
7	#include "perl.h"
8	#include "XSUB.h"
9
10	#include <stddef.h>	53	#include <stddef.h>
11	#include <stdlib.h>	54	#include <stdlib.h>
		55	#include <string.h>
12	#include <errno.h>	56	#include <errno.h>
13	#include <sys/types.h>	57	#include <sys/types.h>
14	#include <sys/stat.h>	58	#include <sys/stat.h>
15	#include <limits.h>	59	#include <limits.h>
16	#include <fcntl.h>	60	#include <fcntl.h>
17	#include <sched.h>	61	#include <assert.h>
		62
		63	/* intptr_t comes from unistd.h, says POSIX/UNIX/tradition */
		64	/* intptr_t only comes from stdint.h, says idiot openbsd coder */
		65	#if HAVE_STDINT_H
		66	# include <stdint.h>
		67	#endif
		68
		69	#ifndef ECANCELED
		70	# define ECANCELED EDOM
		71	#endif
		72	#ifndef ELOOP
		73	# define ELOOP EDOM
		74	#endif
		75
		76	#if !defined(ENOTSOCK) && defined(WSAENOTSOCK)
		77	# define ENOTSOCK WSAENOTSOCK
		78	#endif
		79
		80	static void eio_destroy (eio_req *req);
18		81
19	#ifndef EIO_FINISH	82	#ifndef EIO_FINISH
20	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0	83	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
21	#endif	84	#endif
22		85
…		…
26		89
27	#ifndef EIO_FEED	90	#ifndef EIO_FEED
28	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)	91	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)
29	#endif	92	#endif
30		93
		94	#ifndef EIO_FD_TO_WIN32_HANDLE
		95	# define EIO_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		96	#endif
		97	#ifndef EIO_WIN32_HANDLE_TO_FD
		98	# define EIO_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		99	#endif
		100
		101	#define EIO_ERRNO(errval,retval) ((errno = errval), retval)
		102
		103	#define EIO_ENOSYS() EIO_ERRNO (ENOSYS, -1)
		104
31	#ifdef _WIN32	105	#ifdef _WIN32
32		106
33	/*doh*/	107	#undef PAGESIZE
		108	#define PAGESIZE 4096 /* GetSystemInfo? */
		109
		110	#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)
34		162
35	#else	163	#else
36		164
37	# include "config.h"
38	# include <sys/time.h>	165	#include <sys/time.h>
39	# include <sys/select.h>	166	#include <sys/select.h>
		167	#include <sys/statvfs.h>
40	# include <unistd.h>	168	#include <unistd.h>
41	# include <utime.h>	169	#include <utime.h>
42	# include <signal.h>	170	#include <signal.h>
		171	#include <dirent.h>
43		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
44	# ifndef EIO_STRUCT_DIRENT	197	#ifndef EIO_STRUCT_DIRENT
45	# define EIO_STRUCT_DIRENT struct dirent	198	#define EIO_STRUCT_DIRENT struct dirent
		199	#endif
		200
46	# endif	201	#endif
47
48	#endif
49
50	# ifndef EIO_STRUCT_STAT
51	# define EIO_STRUCT_STAT struct stat
52	# endif
53		202
54	#if HAVE_SENDFILE	203	#if HAVE_SENDFILE
55	# if __linux	204	# if __linux
56	# include <sys/sendfile.h>	205	# include <sys/sendfile.h>
57	# elif __freebsd	206	# elif __FreeBSD__ || defined __APPLE__
58	# include <sys/socket.h>	207	# include <sys/socket.h>
59	# include <sys/uio.h>	208	# include <sys/uio.h>
60	# elif __hpux	209	# elif __hpux
61	# include <sys/socket.h>	210	# include <sys/socket.h>
62	# elif __solaris /* not yet */	211	# elif __solaris
63	# include <sys/sendfile.h>	212	# include <sys/sendfile.h>
64	# else	213	# else
65	# error sendfile support requested but not available	214	# error sendfile support requested but not available
66	# endif	215	# endif
67	#endif	216	#endif
68		217
69	/* number of seconds after which an idle threads exit */	218	#ifndef D_TYPE
70	#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
71		227
72	/* used for struct dirent, AIX doesn't provide it */	228	/* used for struct dirent, AIX doesn't provide it */
73	#ifndef NAME_MAX	229	#ifndef NAME_MAX
74	# define NAME_MAX 4096	230	# define NAME_MAX 4096
75	#endif	231	#endif
76		232
		233	/* used for readlink etc. */
		234	#ifndef PATH_MAX
		235	# define PATH_MAX 4096
		236	#endif
		237
77	/* buffer size for various temporary buffers */	238	/* buffer size for various temporary buffers */
78	#define EIO_BUFSIZE 65536	239	#define EIO_BUFSIZE 65536
79		240
80	#define dBUF \	241	#define dBUF \
81	char *eio_buf; \
82	X_LOCK (wrklock); \
83	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	242	char *eio_buf = malloc (EIO_BUFSIZE); \
84	X_UNLOCK (wrklock); \	243	errno = ENOMEM; \
85	if (!eio_buf) \	244	if (!eio_buf) \
86	return -1;	245	return -1
		246
		247	#define FUBd \
		248	free (eio_buf)
87		249
88	#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;
89		277
90	static void (*want_poll_cb) (void);	278	static void (*want_poll_cb) (void);
91	static void (*done_poll_cb) (void);	279	static void (*done_poll_cb) (void);
92		280
93	static unsigned int max_poll_time = 0;	281	static unsigned int max_poll_time; /* reslock */
94	static unsigned int max_poll_reqs = 0;	282	static unsigned int max_poll_reqs; /* reslock */
95		283
96	/* calculcate time difference in ~1/EIO_TICKS of a second */	284	static volatile unsigned int nreqs; /* reqlock */
97	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	285	static volatile unsigned int nready; /* reqlock */
98	{	286	static volatile unsigned int npending; /* reqlock */
99	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 */
100	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);	288	static volatile unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */
101	}
102		289
103	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)
104		323
105	/* worker threads management */	324	/* worker threads management */
106	static mutex_t wrklock = X_MUTEX_INIT;
107		325
108	typedef struct worker {	326	static void ecb_cold
109	/* locked by wrklock */
110	struct worker *prev, *next;
111
112	thread_t tid;
113
114	/* locked by reslock, reqlock or wrklock */
115	eio_req *req; /* currently processed request */
116	void *dbuf;
117	DIR *dirp;
118	} worker;
119
120	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
121
122	static void worker_clear (worker *wrk)	327	etp_worker_clear (etp_worker *wrk)
123	{	328	{
124	if (wrk->dirp)
125	{
126	closedir (wrk->dirp);
127	wrk->dirp = 0;
128	}
129
130	if (wrk->dbuf)
131	{
132	free (wrk->dbuf);
133	wrk->dbuf = 0;
134	}
135	}	329	}
136		330
137	static void worker_free (worker *wrk)	331	static void ecb_cold
		332	etp_worker_free (etp_worker *wrk)
138	{	333	{
139	wrk->next->prev = wrk->prev;	334	wrk->next->prev = wrk->prev;
140	wrk->prev->next = wrk->next;	335	wrk->prev->next = wrk->next;
141		336
142	free (wrk);	337	free (wrk);
143	}	338	}
144		339
145	static volatile unsigned int nreqs, nready, npending;	340	static unsigned int
146	static volatile unsigned int max_idle = 4;	341	etp_nreqs (void)
147
148	static mutex_t reslock = X_MUTEX_INIT;
149	static mutex_t reqlock = X_MUTEX_INIT;
150	static cond_t reqwait = X_COND_INIT;
151
152	unsigned int eio_nreqs (void)
153	{	342	{
		343	int retval;
		344	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		345	retval = nreqs;
		346	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
154	return nreqs;	347	return retval;
155	}	348	}
156		349
157	unsigned int eio_nready (void)	350	static unsigned int
		351	etp_nready (void)
158	{	352	{
159	unsigned int retval;	353	unsigned int retval;
160		354
161	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	355	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
162	retval = nready;	356	retval = nready;
163	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	357	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
164		358
165	return retval;	359	return retval;
166	}	360	}
167		361
168	unsigned int eio_npending (void)	362	static unsigned int
		363	etp_npending (void)
169	{	364	{
170	unsigned int retval;	365	unsigned int retval;
171		366
172	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	367	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
173	retval = npending;	368	retval = npending;
174	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	369	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
175		370
176	return retval;	371	return retval;
177	}	372	}
178		373
179	unsigned int eio_nthreads (void)	374	static unsigned int
		375	etp_nthreads (void)
180	{	376	{
181	unsigned int retval;	377	unsigned int retval;
182		378
183	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	379	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
184	retval = started;	380	retval = started;
…		…
191	* a somewhat faster data structure might be nice, but	387	* a somewhat faster data structure might be nice, but
192	* with 8 priorities this actually needs <20 insns	388	* with 8 priorities this actually needs <20 insns
193	* per shift, the most expensive operation.	389	* per shift, the most expensive operation.
194	*/	390	*/
195	typedef struct {	391	typedef struct {
196	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 */
197	int size;	393	int size;
198	} reqq;	394	} etp_reqq;
199		395
200	static reqq req_queue;	396	static etp_reqq req_queue;
201	static reqq res_queue;	397	static etp_reqq res_queue;
202		398
203	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)
204	{	412	{
205	int pri = req->pri;	413	int pri = req->pri;
206	req->next = 0;	414	req->next = 0;
207		415
208	if (q->qe[pri])	416	if (q->qe[pri])
…		…
214	q->qe[pri] = q->qs[pri] = req;	422	q->qe[pri] = q->qs[pri] = req;
215		423
216	return q->size++;	424	return q->size++;
217	}	425	}
218		426
219	static eio_req *reqq_shift (reqq *q)	427	static ETP_REQ * ecb_noinline
		428	reqq_shift (etp_reqq *q)
220	{	429	{
221	int pri;	430	int pri;
222		431
223	if (!q->size)	432	if (!q->size)
224	return 0;	433	return 0;
225		434
226	--q->size;	435	--q->size;
227		436
228	for (pri = EIO_NUM_PRI; pri--; )	437	for (pri = ETP_NUM_PRI; pri--; )
229	{	438	{
230	eio_req *req = q->qs[pri];	439	eio_req *req = q->qs[pri];
231		440
232	if (req)	441	if (req)
233	{	442	{
…		…
239	}	448	}
240		449
241	abort ();	450	abort ();
242	}	451	}
243		452
244	static void grp_try_feed (eio_req *grp)	453	static int ecb_cold
		454	etp_init (void (*want_poll)(void), void (*done_poll)(void))
245	{	455	{
246	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	456	X_MUTEX_CREATE (wrklock);
247	{	457	X_MUTEX_CREATE (reslock);
248	int old_len = grp->size;	458	X_MUTEX_CREATE (reqlock);
		459	X_COND_CREATE (reqwait);
249		460
250	EIO_FEED (grp);	461	reqq_init (&req_queue);
		462	reqq_init (&res_queue);
251		463
252	/* stop if no progress has been made */	464	wrk_first.next =
253	if (old_len == grp->size)	465	wrk_first.prev = &wrk_first;
254	{
255	grp->feed = 0;
256	break;
257	}
258	}
259	}
260		466
261	static int eio_finish (eio_req *req);	467	started = 0;
		468	idle = 0;
		469	nreqs = 0;
		470	nready = 0;
		471	npending = 0;
262		472
263	static int grp_dec (eio_req *grp)	473	want_poll_cb = want_poll;
264	{	474	done_poll_cb = done_poll;
265	--grp->size;
266		475
267	/* call feeder, if applicable */
268	grp_try_feed (grp);
269
270	/* finish, if done */
271	if (!grp->size && grp->int1)
272	return eio_finish (grp);
273	else
274	return 0;	476	return 0;
275	}	477	}
276		478
277	void eio_destroy (eio_req *req)
278	{
279	if ((req)->flags & EIO_FLAG_PTR2_FREE)
280	free (req->ptr2);
281
282	EIO_DESTROY (req);
283	}
284
285	static int eio_finish (eio_req *req)
286	{
287	int res = EIO_FINISH (req);
288
289	if (req->grp)
290	{
291	int res2;
292	eio_req *grp = req->grp;
293
294	/* unlink request */
295	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
296	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
297
298	if (grp->grp_first == req)
299	grp->grp_first = req->grp_next;
300
301	res2 = grp_dec (grp);
302
303	if (!res && res2)
304	res = res2;
305	}
306
307	eio_destroy (req);
308
309	return res;
310	}
311
312	void eio_grp_cancel (eio_req *grp)
313	{
314	for (grp = grp->grp_first; grp; grp = grp->grp_next)
315	eio_cancel (grp);
316	}
317
318	void eio_cancel (eio_req *req)
319	{
320	req->flags |= EIO_FLAG_CANCELLED;
321
322	eio_grp_cancel (req);
323	}
324
325	X_THREAD_PROC (eio_proc);	479	X_THREAD_PROC (etp_proc);
326		480
327	static void start_thread (void)	481	static void ecb_cold
		482	etp_start_thread (void)
328	{	483	{
329	worker *wrk = calloc (1, sizeof (worker));	484	etp_worker *wrk = calloc (1, sizeof (etp_worker));
330		485
331	if (!wrk)	486	/*TODO*/
332	croak ("unable to allocate worker thread data");	487	assert (("unable to allocate worker thread data", wrk));
333		488
334	X_LOCK (wrklock);	489	X_LOCK (wrklock);
335		490
336	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))	491	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
337	{	492	{
338	wrk->prev = &wrk_first;	493	wrk->prev = &wrk_first;
339	wrk->next = wrk_first.next;	494	wrk->next = wrk_first.next;
340	wrk_first.next->prev = wrk;	495	wrk_first.next->prev = wrk;
341	wrk_first.next = wrk;	496	wrk_first.next = wrk;
…		…
345	free (wrk);	500	free (wrk);
346		501
347	X_UNLOCK (wrklock);	502	X_UNLOCK (wrklock);
348	}	503	}
349		504
		505	static void
350	static void maybe_start_thread (void)	506	etp_maybe_start_thread (void)
351	{	507	{
352	if (eio_nthreads () >= wanted)	508	if (ecb_expect_true (etp_nthreads () >= wanted))
353	return;	509	return;
354		510
355	/* todo: maybe use idle here, but might be less exact */	511	/* todo: maybe use idle here, but might be less exact */
356	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 ()))
357	return;	513	return;
358		514
359	start_thread ();	515	etp_start_thread ();
360	}	516	}
361		517
362	void eio_submit (eio_req *req)	518	static void ecb_cold
363	{	519	etp_end_thread (void)
364	++nreqs;
365
366	X_LOCK (reqlock);
367	++nready;
368	reqq_push (&req_queue, req);
369	X_COND_SIGNAL (reqwait);
370	X_UNLOCK (reqlock);
371
372	maybe_start_thread ();
373	}
374
375	static void end_thread (void)
376	{	520	{
377	eio_req *req = calloc (1, sizeof (eio_req));	521	eio_req *req = calloc (1, sizeof (eio_req));
378		522
379	req->type = EIO_QUIT;	523	req->type = -1;
380	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	524	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
381		525
382	X_LOCK (reqlock);	526	X_LOCK (reqlock);
383	reqq_push (&req_queue, req);	527	reqq_push (&req_queue, req);
384	X_COND_SIGNAL (reqwait);	528	X_COND_SIGNAL (reqwait);
385	X_UNLOCK (reqlock);	529	X_UNLOCK (reqlock);
…		…
387	X_LOCK (wrklock);	531	X_LOCK (wrklock);
388	--started;	532	--started;
389	X_UNLOCK (wrklock);	533	X_UNLOCK (wrklock);
390	}	534	}
391		535
392	void eio_set_max_poll_time (double nseconds)	536	static int
393	{
394	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
395	max_poll_time = nseconds;
396	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
397	}
398
399	void eio_set_max_poll_reqs (unsigned int maxreqs)
400	{
401	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
402	max_poll_reqs = maxreqs;
403	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
404	}
405
406	void eio_set_max_idle (unsigned int nthreads)
407	{
408	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
409	max_idle = nthreads <= 0 ? 1 : nthreads;
410	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
411	}
412
413	void eio_set_min_parallel (unsigned int nthreads)
414	{
415	if (wanted < nthreads)
416	wanted = nthreads;
417	}
418
419	void eio_set_max_parallel (unsigned int nthreads)
420	{
421	if (wanted > nthreads)
422	wanted = nthreads;
423
424	while (started > wanted)
425	end_thread ();
426	}
427
428	int eio_poll (void)	537	etp_poll (void)
429	{	538	{
430	int maxreqs = max_poll_reqs;	539	unsigned int maxreqs;
		540	unsigned int maxtime;
431	struct timeval tv_start, tv_now;	541	struct timeval tv_start, tv_now;
432	eio_req *req;
433		542
		543	X_LOCK (reslock);
		544	maxreqs = max_poll_reqs;
		545	maxtime = max_poll_time;
		546	X_UNLOCK (reslock);
		547
434	if (max_poll_time)	548	if (maxtime)
435	gettimeofday (&tv_start, 0);	549	gettimeofday (&tv_start, 0);
436		550
437	for (;;)	551	for (;;)
438	{	552	{
		553	ETP_REQ *req;
		554
439	maybe_start_thread ();	555	etp_maybe_start_thread ();
440		556
441	X_LOCK (reslock);	557	X_LOCK (reslock);
442	req = reqq_shift (&res_queue);	558	req = reqq_shift (&res_queue);
443		559
444	if (req)	560	if (req)
…		…
452	X_UNLOCK (reslock);	568	X_UNLOCK (reslock);
453		569
454	if (!req)	570	if (!req)
455	return 0;	571	return 0;
456		572
		573	X_LOCK (reqlock);
457	--nreqs;	574	--nreqs;
		575	X_UNLOCK (reqlock);
458		576
459	if (req->type == EIO_GROUP && req->size)	577	if (ecb_expect_false (req->type == EIO_GROUP && req->size))
460	{	578	{
461	req->int1 = 1; /* mark request as delayed */	579	req->int1 = 1; /* mark request as delayed */
462	continue;	580	continue;
463	}	581	}
464	else	582	else
465	{	583	{
466	int res = eio_finish (req);	584	int res = ETP_FINISH (req);
467	if (res)	585	if (ecb_expect_false (res))
468	return res;	586	return res;
469	}	587	}
470		588
471	if (maxreqs && !--maxreqs)	589	if (ecb_expect_false (maxreqs && !--maxreqs))
472	break;	590	break;
473		591
474	if (max_poll_time)	592	if (maxtime)
475	{	593	{
476	gettimeofday (&tv_now, 0);	594	gettimeofday (&tv_now, 0);
477		595
478	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)	596	if (tvdiff (&tv_start, &tv_now) >= maxtime)
479	break;	597	break;
480	}	598	}
481	}	599	}
482		600
483	errno = EAGAIN;	601	errno = EAGAIN;
484	return -1;	602	return -1;
485	}	603	}
486		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
487	/*****************************************************************************/	855	/*****************************************************************************/
488	/* work around various missing functions */	856	/* work around various missing functions */
489		857
490	#if !HAVE_PREADWRITE	858	#if !HAVE_PREADWRITE
		859	# undef pread
		860	# undef pwrite
491	# define pread aio_pread	861	# define pread eio__pread
492	# define pwrite aio_pwrite	862	# define pwrite eio__pwrite
493		863
494	/*	864	static eio_ssize_t
495	* make our pread/pwrite safe against themselves, but not against	865	eio__pread (int fd, void *buf, size_t count, off_t offset)
496	* normal read/write by using a mutex. slows down execution a lot,
497	* but that's your problem, not mine.
498	*/
499	static mutex_t preadwritelock = X_MUTEX_INIT;
500
501	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
502	{	866	{
503	ssize_t res;	867	eio_ssize_t res;
504	off_t ooffset;	868	off_t ooffset;
505		869
506	X_LOCK (preadwritelock);	870	X_LOCK (preadwritelock);
507	ooffset = lseek (fd, 0, SEEK_CUR);	871	ooffset = lseek (fd, 0, SEEK_CUR);
508	lseek (fd, offset, SEEK_SET);	872	lseek (fd, offset, SEEK_SET);
…		…
511	X_UNLOCK (preadwritelock);	875	X_UNLOCK (preadwritelock);
512		876
513	return res;	877	return res;
514	}	878	}
515		879
516	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)
517	{	882	{
518	ssize_t res;	883	eio_ssize_t res;
519	off_t ooffset;	884	off_t ooffset;
520		885
521	X_LOCK (preadwritelock);	886	X_LOCK (preadwritelock);
522	ooffset = lseek (fd, 0, SEEK_CUR);	887	ooffset = lseek (fd, 0, SEEK_CUR);
523	lseek (fd, offset, SEEK_SET);	888	lseek (fd, offset, SEEK_SET);
524	res = write (fd, buf, count);	889	res = write (fd, buf, count);
525	lseek (fd, offset, SEEK_SET);	890	lseek (fd, ooffset, SEEK_SET);
526	X_UNLOCK (preadwritelock);	891	X_UNLOCK (preadwritelock);
527		892
528	return res;	893	return res;
529	}	894	}
530	#endif	895	#endif
531		896
532	#ifndef HAVE_FUTIMES	897	#ifndef HAVE_UTIMES
533		898
		899	# undef utimes
534	# define utimes(path,times) aio_utimes (path, times)	900	# define utimes(path,times) eio__utimes (path, times)
535	# define futimes(fd,times) aio_futimes (fd, times)
536		901
		902	static int
537	static int aio_utimes (const char *filename, const struct timeval times[2])	903	eio__utimes (const char *filename, const struct timeval times[2])
538	{	904	{
539	if (times)	905	if (times)
540	{	906	{
541	struct utimbuf buf;	907	struct utimbuf buf;
542		908
…		…
547	}	913	}
548	else	914	else
549	return utime (filename, 0);	915	return utime (filename, 0);
550	}	916	}
551		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
552	static int aio_futimes (int fd, const struct timeval tv[2])	926	eio__futimes (int fd, const struct timeval tv[2])
553	{	927	{
554	errno = ENOSYS;	928	errno = ENOSYS;
555	return -1;	929	return -1;
556	}	930	}
557		931
558	#endif	932	#endif
559		933
560	#if !HAVE_FDATASYNC	934	#if !HAVE_FDATASYNC
		935	# undef fdatasync
561	# define fdatasync fsync	936	# define fdatasync(fd) fsync (fd)
562	#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	}
563		977
564	#if !HAVE_READAHEAD	978	#if !HAVE_READAHEAD
		979	# undef readahead
565	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	980	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
566		981
		982	static eio_ssize_t
567	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)
568	{	984	{
569	size_t todo = count;	985	size_t todo = count;
570	dBUF;	986	dBUF;
571		987
572	while (todo > 0)	988	while (todo > 0)
573	{	989	{
574	size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE;	990	size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE;
575		991
576	pread (fd, aio_buf, len, offset);	992	pread (fd, eio_buf, len, offset);
577	offset += len;	993	offset += len;
578	todo -= len;	994	todo -= len;
579	}	995	}
580		996
		997	FUBd;
		998
581	errno = 0;	999	errno = 0;
582	return count;	1000	return count;
583	}	1001	}
584		1002
585	#endif	1003	#endif
586		1004
587	#if !HAVE_READDIR_R
588	# define readdir_r aio_readdir_r
589
590	static mutex_t readdirlock = X_MUTEX_INIT;
591
592	static int readdir_r (DIR *dirp, X_DIRENT *ent, X_DIRENT **res)
593	{
594	X_DIRENT *e;
595	int errorno;
596
597	X_LOCK (readdirlock);
598
599	e = readdir (dirp);
600	errorno = errno;
601
602	if (e)
603	{
604	*res = ent;
605	strcpy (ent->d_name, e->d_name);
606	}
607	else
608	*res = 0;
609
610	X_UNLOCK (readdirlock);
611
612	errno = errorno;
613	return e ? 0 : -1;
614	}
615	#endif
616
617	/* sendfile always needs emulation */	1005	/* sendfile always needs emulation */
		1006	static eio_ssize_t
618	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)
619	{	1008	{
		1009	eio_ssize_t written = 0;
620	ssize_t res;	1010	eio_ssize_t res;
621		1011
622	if (!count)	1012	if (!count)
623	return 0;	1013	return 0;
624		1014
		1015	for (;;)
		1016	{
		1017	#ifdef __APPLE__
		1018	# undef HAVE_SENDFILE /* broken, as everything on os x */
		1019	#endif
625	#if HAVE_SENDFILE	1020	#if HAVE_SENDFILE
626	# if __linux	1021	# if __linux
		1022	off_t soffset = offset;
627	res = sendfile (ofd, ifd, &offset, count);	1023	res = sendfile (ofd, ifd, &soffset, count);
628		1024
629	# elif __freebsd	1025	# elif __FreeBSD__
630	/*	1026	/*
631	* 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
632	* wasted on making it similar to other I/O functions.	1028	* wasted on making it similar to other I/O functions.
633	*/	1029	*/
634	{
635	off_t sbytes;	1030	off_t sbytes;
636	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	1031	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
637		1032
638	if (res < 0 && sbytes)	1033	#if 0 /* according to the manpage, this is correct, but broken behaviour */
639	/* 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)
640	res = sbytes;	1038	res = sbytes;
641	}	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;
642		1052
643	# elif __hpux	1053	# elif __hpux
644	res = sendfile (ofd, ifd, offset, count, 0, 0);	1054	res = sendfile (ofd, ifd, offset, count, 0, 0);
645		1055
646	# elif __solaris	1056	# elif __solaris
647	{
648	struct sendfilevec vec;	1057	struct sendfilevec vec;
649	size_t sbytes;	1058	size_t sbytes;
650		1059
651	vec.sfv_fd = ifd;	1060	vec.sfv_fd = ifd;
652	vec.sfv_flag = 0;	1061	vec.sfv_flag = 0;
653	vec.sfv_off = offset;	1062	vec.sfv_off = offset;
654	vec.sfv_len = count;	1063	vec.sfv_len = count;
655		1064
656	res = sendfilev (ofd, &vec, 1, &sbytes);	1065	res = sendfilev (ofd, &vec, 1, &sbytes);
657		1066
658	if (res < 0 && sbytes)	1067	if (res < 0 && sbytes)
659	res = sbytes;	1068	res = sbytes;
660	}
661		1069
662	# 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
663	#else	1081	#else
664	res = -1;	1082	res = -1;
665	errno = ENOSYS;	1083	errno = ENOSYS;
666	#endif	1084	#endif
667		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
668	if (res < 0	1109	if (res < 0
669	&& (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
670	#if __solaris	1118	#if __solaris
671	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	1119	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
672	#endif	1120	#endif
673	)	1121	)
674	)	1122	)
…		…
678		1126
679	res = 0;	1127	res = 0;
680		1128
681	while (count)	1129	while (count)
682	{	1130	{
683	ssize_t cnt;	1131	eio_ssize_t cnt;
684		1132
685	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);
686		1134
687	if (cnt <= 0)	1135	if (cnt <= 0)
688	{	1136	{
…		…
700		1148
701	offset += cnt;	1149	offset += cnt;
702	res += cnt;	1150	res += cnt;
703	count -= cnt;	1151	count -= cnt;
704	}	1152	}
		1153
		1154	FUBd;
705	}	1155	}
706		1156
707	return res;	1157	return res;
708	}	1158	}
709		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
710	/* read a full directory */	1604	/* read a full directory */
		1605	static void
711	static void scandir_ (eio_req *req, worker *self)	1606	eio__scandir (eio_req *req, etp_worker *self)
712	{	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
713	DIR *dirp;	1620	DIR *dirp;
714	union
715	{
716	EIO_STRUCT_DIRENT d;
717	char b [offsetof (EIO_STRUCT_DIRENT, d_name) + NAME_MAX + 1];
718	} *u;
719	EIO_STRUCT_DIRENT *entp;	1621	EIO_STRUCT_DIRENT *entp;
720	char *name, *names;	1622	#endif
721	int memlen = 4096;
722	int memofs = 0;
723	int res = 0;
724		1623
725	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
726	self->dirp = dirp = opendir (req->ptr1);	1673	dirp = opendir (req->ptr1);
727	self->dbuf = u = malloc (sizeof (*u));	1674	#endif
		1675
728	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;
729	req->ptr2 = names = malloc (memlen);	1681	req->ptr2 = names = malloc (namesalloc);
730	X_UNLOCK (wrklock);
731		1682
732	if (dirp && u && names)	1683	if (dirp && names && (!flags || dents))
733	for (;;)	1684	for (;;)
734	{	1685	{
		1686	int done;
		1687
		1688	#ifdef _WIN32
		1689	done = !dirp;
		1690	#else
735	errno = 0;	1691	errno = 0;
736	readdir_r (dirp, &u->d, &entp);	1692	entp = readdir (dirp);
		1693	done = !entp;
		1694	#endif
737		1695
738	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
739	break;	1740	break;
		1741	}
740		1742
741	name = entp->d_name;	1743	/* now add the entry to our list(s) */
		1744	name = D_NAME (entp);
742		1745
		1746	/* skip . and .. entries */
743	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	1747	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
744	{	1748	{
745	int len = strlen (name) + 1;	1749	int len = D_NAMLEN (entp) + 1;
746		1750
747	res++;	1751	while (ecb_expect_false (namesoffs + len > namesalloc))
748
749	while (memofs + len > memlen)
750	{	1752	{
751	memlen *= 2;	1753	namesalloc *= 2;
752	X_LOCK (wrklock);
753	req->ptr2 = names = realloc (names, memlen);	1754	req->ptr2 = names = realloc (names, namesalloc);
754	X_UNLOCK (wrklock);
755		1755
756	if (!names)	1756	if (!names)
757	break;	1757	break;
758	}	1758	}
759		1759
760	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
761	memofs += len;	1850	namesoffs += len;
		1851	++dentoffs;
762	}	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
763	}	1867	}
764
765	if (errno)
766	res = -1;
767
768	req->result = res;
769	}	1868	}
770		1869
771	/*****************************************************************************/	1870	/*****************************************************************************/
772		1871
		1872	#define ALLOC(len) \
		1873	if (!req->ptr2) \
		1874	{ \
		1875	X_LOCK (wrklock); \
		1876	req->flags |= EIO_FLAG_PTR2_FREE; \
		1877	X_UNLOCK (wrklock); \
		1878	req->ptr2 = malloc (len); \
		1879	if (!req->ptr2) \
		1880	{ \
		1881	errno = ENOMEM; \
		1882	req->result = -1; \
		1883	break; \
		1884	} \
		1885	}
		1886
773	X_THREAD_PROC (eio_proc)	1887	X_THREAD_PROC (etp_proc)
774	{	1888	{
775	eio_req *req;	1889	ETP_REQ *req;
776	struct timespec ts;	1890	struct timespec ts;
777	worker *self = (worker *)thr_arg;	1891	etp_worker *self = (etp_worker *)thr_arg;
778		1892
779	/* try to distribute timeouts somewhat randomly */	1893	/* try to distribute timeouts somewhat evenly */
780	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1894	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
781		1895
782	for (;;)	1896	for (;;)
783	{	1897	{
784	ts.tv_sec = time (0) + IDLE_TIMEOUT;	1898	ts.tv_sec = 0;
785		1899
786	X_LOCK (reqlock);	1900	X_LOCK (reqlock);
787		1901
788	for (;;)	1902	for (;;)
789	{	1903	{
790	self->req = req = reqq_shift (&req_queue);	1904	self->req = req = reqq_shift (&req_queue);
791		1905
792	if (req)	1906	if (req)
793	break;	1907	break;
794		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
795	++idle;	1918	++idle;
796		1919
797	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
798	{	1924	{
799	if (idle > max_idle)	1925	/* initialise timeout once */
800	{	1926	if (!ts.tv_sec)
801	--idle;	1927	ts.tv_sec = time (0) + idle_timeout;
802	X_UNLOCK (reqlock);
803	X_LOCK (wrklock);
804	--started;
805	X_UNLOCK (wrklock);
806	goto quit;
807	}
808		1928
809	/* we are allowed to idle, so do so without any timeout */
810	X_COND_WAIT (reqwait, reqlock);	1929	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
811	ts.tv_sec = time (0) + IDLE_TIMEOUT;	1930	ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */
812	}	1931	}
813		1932
814	--idle;	1933	--idle;
815	}	1934	}
816		1935
817	--nready;	1936	--nready;
818		1937
819	X_UNLOCK (reqlock);	1938	X_UNLOCK (reqlock);
820		1939
821	errno = 0; /* strictly unnecessary */
822
823	if (!EIO_CANCELLED (req))
824	switch (req->type)	1940	if (req->type < 0)
825	{
826	case EIO_READ: req->result = req->offs >= 0
827	? pread (req->int1, req->ptr2, req->size, req->offs)
828	: read (req->int1, req->ptr2, req->size); break;
829	case EIO_WRITE: req->result = req->offs >= 0
830	? pwrite (req->int1, req->ptr2, req->size, req->offs)
831	: write (req->int1, req->ptr2, req->size); break;
832
833	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
834	case EIO_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
835
836	case EIO_STAT: req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
837	case EIO_LSTAT: req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
838	case EIO_FSTAT: req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
839
840	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
841	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
842	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
843	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
844	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
845	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
846
847	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
848	case EIO_CLOSE: req->result = close (req->int1); break;
849	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
850	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
851	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
852	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
853	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
854	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
855	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
856	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
857	case EIO_READLINK: req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
858
859	case EIO_SYNC: req->result = 0; sync (); break;
860	case EIO_FSYNC: req->result = fsync (req->int1); break;
861	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
862
863	case EIO_READDIR: scandir_ (req, self); break;
864
865	case EIO_BUSY:
866	#ifdef _WIN32
867	Sleep (req->nv1 * 1000.);
868	#else
869	{
870	struct timeval tv;
871
872	tv.tv_sec = req->nv1;
873	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
874
875	req->result = select (0, 0, 0, 0, &tv);
876	}
877	#endif
878	break;
879
880	case EIO_UTIME:
881	case EIO_FUTIME:
882	{
883	struct timeval tv[2];
884	struct timeval *times;
885
886	if (req->nv1 != -1. || req->nv2 != -1.)
887	{
888	tv[0].tv_sec = req->nv1;
889	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
890	tv[1].tv_sec = req->nv2;
891	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
892
893	times = tv;
894	}
895	else
896	times = 0;
897
898
899	req->result = req->type == EIO_FUTIME
900	? futimes (req->int1, times)
901	: utimes (req->ptr1, times);
902	}
903
904	case EIO_GROUP:
905	case EIO_NOP:
906	break;
907
908	case EIO_QUIT:
909	goto quit;	1941	goto quit;
910		1942
911	default:	1943	ETP_EXECUTE (self, req);
912	req->result = -1;
913	break;
914	}
915
916	req->errorno = errno;
917		1944
918	X_LOCK (reslock);	1945	X_LOCK (reslock);
919		1946
920	++npending;	1947	++npending;
921		1948
922	if (!reqq_push (&res_queue, req) && want_poll_cb)	1949	if (!reqq_push (&res_queue, req) && want_poll_cb)
923	want_poll_cb ();	1950	want_poll_cb ();
924		1951
925	self->req = 0;	1952	self->req = 0;
926	worker_clear (self);	1953	etp_worker_clear (self);
927		1954
928	X_UNLOCK (reslock);	1955	X_UNLOCK (reslock);
929	}	1956	}
930		1957
931	quit:	1958	quit:
932	X_LOCK (wrklock);	1959	X_LOCK (wrklock);
933	worker_free (self);	1960	etp_worker_free (self);
934	X_UNLOCK (wrklock);	1961	X_UNLOCK (wrklock);
935		1962
936	return 0;	1963	return 0;
937	}	1964	}
938		1965
939	/*****************************************************************************/	1966	/*****************************************************************************/
940		1967
941	static void eio_atfork_prepare (void)	1968	int ecb_cold
		1969	eio_init (void (*want_poll)(void), void (*done_poll)(void))
942	{	1970	{
943	X_LOCK (wrklock);
944	X_LOCK (reqlock);
945	X_LOCK (reslock);
946	#if !HAVE_PREADWRITE	1971	#if !HAVE_PREADWRITE
947	X_LOCK (preadwritelock);
948	#endif
949	#if !HAVE_READDIR_R
950	X_LOCK (readdirlock);
951	#endif
952	}
953
954	static void eio_atfork_parent (void)
955	{
956	#if !HAVE_READDIR_R
957	X_UNLOCK (readdirlock);
958	#endif
959	#if !HAVE_PREADWRITE
960	X_UNLOCK (preadwritelock);	1972	X_MUTEX_CREATE (preadwritelock);
961	#endif	1973	#endif
962	X_UNLOCK (reslock);
963	X_UNLOCK (reqlock);
964	X_UNLOCK (wrklock);
965	}
966		1974
967	static void eio_atfork_child (void)	1975	return etp_init (want_poll, done_poll);
968	{	1976	}
969	eio_req *prv;
970		1977
971	while (prv = reqq_shift (&req_queue))	1978	ecb_inline void
972	eio_destroy (prv);	1979	eio_api_destroy (eio_req *req)
		1980	{
		1981	free (req);
		1982	}
973		1983
974	while (prv = reqq_shift (&res_queue))	1984	#define REQ(rtype) \
975	eio_destroy (prv);	1985	eio_req *req; \
		1986	\
		1987	req = (eio_req *)calloc (1, sizeof *req); \
		1988	if (!req) \
		1989	return 0; \
		1990	\
		1991	req->type = rtype; \
		1992	req->pri = pri; \
		1993	req->finish = cb; \
		1994	req->data = data; \
		1995	req->destroy = eio_api_destroy;
976		1996
977	while (wrk_first.next != &wrk_first)	1997	#define SEND eio_submit (req); return req
		1998
		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	}
		2007
		2008	static void
		2009	eio_execute (etp_worker *self, eio_req *req)
		2010	{
		2011	if (ecb_expect_false (EIO_CANCELLED (req)))
978	{	2012	{
979	worker *wrk = wrk_first.next;	2013	req->result = -1;
980		2014	req->errorno = ECANCELED;
981	if (wrk->req)	2015	return;
982	eio_destroy (wrk->req);
983
984	worker_clear (wrk);
985	worker_free (wrk);
986	}	2016	}
987		2017
988	started = 0;	2018	switch (req->type)
989	idle = 0;	2019	{
990	nreqs = 0;	2020	case EIO_READ: ALLOC (req->size);
991	nready = 0;	2021	req->result = req->offs >= 0
992	npending = 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;
993		2027
994	eio_atfork_parent ();	2028	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
995	}	2029	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size); break;
996		2030
997	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	2031	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
998	{	2032	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
999	want_poll_cb = want_poll;	2033	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1000	done_poll_cb = done_poll;	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;
1001		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:
1002	#ifdef _WIN32	2079	#ifdef _WIN32
1003	X_MUTEX_CHECK (wrklock);	2080	Sleep (req->nv1 * 1e3);
1004	X_MUTEX_CHECK (reslock);	2081	#else
1005	X_MUTEX_CHECK (reqlock);	2082	{
1006	X_MUTEX_CHECK (reqwait);	2083	struct timeval tv;
1007	X_MUTEX_CHECK (preadwritelock);
1008	X_MUTEX_CHECK (readdirlock);
1009		2084
1010	X_COND_CHECK (reqwait);	2085	tv.tv_sec = req->nv1;
1011	#endif	2086	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6;
1012		2087
1013	X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);	2088	req->result = select (0, 0, 0, 0, &tv);
1014	}	2089	}
		2090	#endif
		2091	break;
1015		2092
1016	#if 0	2093	case EIO_UTIME:
		2094	case EIO_FUTIME:
		2095	{
		2096	struct timeval tv[2];
		2097	struct timeval *times;
1017		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
1018	eio_req *eio_fsync (int fd, eio_cb cb);	2149	eio_req *eio_sync (int pri, eio_cb cb, void *data)
		2150	{
		2151	REQ (EIO_SYNC); SEND;
		2152	}
		2153
		2154	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
		2155	{
		2156	REQ (EIO_FSYNC); req->int1 = fd; SEND;
		2157	}
		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
1019	eio_req *eio_fdatasync (int fd, eio_cb cb);	2189	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1020	eio_req *eio_dupclose (int fd, eio_cb cb);	2190	{
		2191	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
		2192	}
		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
1021	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)
1022	eio_req *eio_read (int fd, off_t offs, size_t length, char *data, eio_cb cb);	2200	{
1023	eio_req *eio_write (int fd, off_t offs, size_t length, char *data, eio_cb cb);	2201	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
1024	eio_req *eio_fstat (int fd, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */	2202	}
		2203
		2204	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		2205	{
		2206	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		2207	}
		2208
		2209	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		2210	{
		2211	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		2212	}
		2213
		2214	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
		2215	{
		2216	REQ (EIO_FSTAT); req->int1 = fd; SEND;
		2217	}
		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
1025	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)
		2225	{
		2226	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
		2227	}
		2228
1026	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)
		2230	{
		2231	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
		2232	}
		2233
1027	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)
		2235	{
		2236	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
		2237	}
		2238
1028	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)
		2240	{
		2241	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
		2242	}
		2243
1029	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)
		2245	{
		2246	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
		2247	}
		2248
1030	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)
		2250	{
		2251	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
		2252	}
		2253
1031	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)
1032	eio_req *eio_readlink (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */	2255	{
1033	eio_req *eio_stat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */	2256	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
1034	eio_req *eio_lstat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */	2257	}
		2258
1035	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)
		2260	{
		2261	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
		2262	}
		2263
1036	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)
		2265	{
		2266	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
		2267	}
		2268
		2269	eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
		2270	{
		2271	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
		2272	}
		2273
1037	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)
		2275	{
		2276	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
		2277	}
		2278
1038	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)
1039	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb);	2280	{
		2281	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
		2282	}
		2283
		2284	static eio_req *
		2285	eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
		2286	{
		2287	REQ (type); PATH; SEND;
		2288	}
		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
1040	eio_req *eio_unlink (const char *path, eio_cb cb);	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
1041	eio_req *eio_rmdir (const char *path, eio_cb cb);	2320	eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
1042	eio_req *eio_readdir (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */	2321	{
		2322	return eio__1path (EIO_RMDIR, path, pri, cb, data);
		2323	}
		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
1043	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)
1044	eio_req *eio_busy (double delay, eio_cb cb); /* ties a thread for this long, simulating busyness */	2331	{
1045	eio_req *eio_nop (eio_cb cb); /* does nothing except go through the whole process */	2332	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND;
		2333	}
		2334
		2335	static eio_req *
		2336	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2337	{
		2338	REQ (type); PATH;
		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
		2373	eio_req *eio_grp (eio_cb cb, void *data)
		2374	{
		2375	const int pri = EIO_PRI_MAX;
		2376
		2377	REQ (EIO_GROUP); SEND;
		2378	}
		2379
		2380	#undef REQ
		2381	#undef PATH
		2382	#undef SEND
		2383
		2384	/*****************************************************************************/
		2385	/* grp functions */
		2386
1046	void	2387	void
1047	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1048	PROTOTYPE: $$$;$
1049	PPCODE:
1050	{
1051	dREQ;
1052
1053	req->type = EIO_OPEN;
1054	req->sv1 = newSVsv (pathname);
1055	req->ptr1 = SvPVbyte_nolen (req->sv1);
1056	req->int1 = flags;
1057	req->int2 = mode;
1058
1059	EIO_SEND;
1060	}
1061
1062	void
1063	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1064	PROTOTYPE: $;$
1065	ALIAS:
1066	aio_fsync = EIO_FSYNC
1067	aio_fdatasync = EIO_FDATASYNC
1068	PPCODE:
1069	{
1070	dREQ;
1071
1072	req->type = ix;
1073	req->sv1 = newSVsv (fh);
1074	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1075
1076	EIO_SEND (req);
1077	}
1078
1079	void
1080	aio_close (SV *fh, SV *callback=&PL_sv_undef)
1081	PROTOTYPE: $;$
1082	PPCODE:
1083	{
1084	dREQ;
1085
1086	req->type = EIO_CLOSE;
1087	req->sv1 = newSVsv (fh);
1088	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1089
1090	EIO_SEND (req);
1091	}
1092
1093	void
1094	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1095	ALIAS:
1096	aio_read = EIO_READ
1097	aio_write = EIO_WRITE
1098	PROTOTYPE: $$$$$;$
1099	PPCODE:
1100	{
1101	STRLEN svlen;
1102	char *svptr = SvPVbyte (data, svlen);
1103	UV len = SvUV (length);
1104
1105	SvUPGRADE (data, SVt_PV);
1106	SvPOK_on (data);
1107
1108	if (dataoffset < 0)
1109	dataoffset += svlen;
1110
1111	if (dataoffset < 0 || dataoffset > svlen)
1112	croak ("dataoffset outside of data scalar");
1113
1114	if (ix == EIO_WRITE)
1115	{
1116	/* write: check length and adjust. */
1117	if (!SvOK (length) || len + dataoffset > svlen)
1118	len = svlen - dataoffset;
1119	}
1120	else
1121	{
1122	/* read: grow scalar as necessary */
1123	svptr = SvGROW (data, len + dataoffset + 1);
1124	}
1125
1126	if (len < 0)
1127	croak ("length must not be negative");
1128
1129	{
1130	dREQ;
1131
1132	req->type = ix;
1133	req->sv1 = newSVsv (fh);
1134	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1135	: IoOFP (sv_2io (fh)));
1136	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1137	req->size = len;
1138	req->sv2 = SvREFCNT_inc (data);
1139	req->ptr2 = (char *)svptr + dataoffset;
1140	req->stroffset = dataoffset;
1141
1142	if (!SvREADONLY (data))
1143	{
1144	SvREADONLY_on (data);
1145	req->flags |= FLAG_SV2_RO_OFF;
1146	}
1147
1148	EIO_SEND;
1149	}
1150	}
1151
1152	void
1153	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1154	PROTOTYPE: $$;$
1155	PPCODE:
1156	{
1157	SV *data;
1158	dREQ;
1159
1160	data = newSV (NAME_MAX);
1161	SvPOK_on (data);
1162
1163	req->type = EIO_READLINK;
1164	req->sv1 = newSVsv (path);
1165	req->ptr1 = SvPVbyte_nolen (req->sv1);
1166	req->sv2 = data;
1167	req->ptr2 = SvPVbyte_nolen (data);
1168
1169	EIO_SEND;
1170	}
1171
1172	void
1173	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1174	PROTOTYPE: $$$$;$
1175	PPCODE:
1176	{
1177	dREQ;
1178
1179	req->type = EIO_SENDFILE;
1180	req->sv1 = newSVsv (out_fh);
1181	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1182	req->sv2 = newSVsv (in_fh);
1183	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1184	req->offs = SvVAL64 (in_offset);
1185	req->size = length;
1186
1187	EIO_SEND;
1188	}
1189
1190	void
1191	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1192	PROTOTYPE: $$$;$
1193	PPCODE:
1194	{
1195	dREQ;
1196
1197	req->type = EIO_READAHEAD;
1198	req->sv1 = newSVsv (fh);
1199	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1200	req->offs = SvVAL64 (offset);
1201	req->size = length;
1202
1203	EIO_SEND;
1204	}
1205
1206	void
1207	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1208	ALIAS:
1209	aio_stat = EIO_STAT
1210	aio_lstat = EIO_LSTAT
1211	PPCODE:
1212	{
1213	dREQ;
1214
1215	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1216	if (!req->ptr2)
1217	{
1218	req_destroy (req);
1219	croak ("out of memory during aio_stat statdata allocation");
1220	}
1221
1222	req->flags |= FLAG_PTR2_FREE;
1223	req->sv1 = newSVsv (fh_or_path);
1224
1225	if (SvPOK (fh_or_path))
1226	{
1227	req->type = ix;
1228	req->ptr1 = SvPVbyte_nolen (req->sv1);
1229	}
1230	else
1231	{
1232	req->type = EIO_FSTAT;
1233	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1234	}
1235
1236	EIO_SEND;
1237	}
1238
1239	void
1240	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
1241	PPCODE:
1242	{
1243	dREQ;
1244
1245	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1246	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1247	req->sv1 = newSVsv (fh_or_path);
1248
1249	if (SvPOK (fh_or_path))
1250	{
1251	req->type = EIO_UTIME;
1252	req->ptr1 = SvPVbyte_nolen (req->sv1);
1253	}
1254	else
1255	{
1256	req->type = EIO_FUTIME;
1257	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1258	}
1259
1260	EIO_SEND;
1261	}
1262
1263	void
1264	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
1265	PPCODE:
1266	{
1267	dREQ;
1268
1269	req->sv1 = newSVsv (fh_or_path);
1270	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1271
1272	if (SvPOK (fh_or_path))
1273	{
1274	req->type = EIO_TRUNCATE;
1275	req->ptr1 = SvPVbyte_nolen (req->sv1);
1276	}
1277	else
1278	{
1279	req->type = EIO_FTRUNCATE;
1280	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1281	}
1282
1283	EIO_SEND;
1284	}
1285
1286	void
1287	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
1288	ALIAS:
1289	aio_chmod = EIO_CHMOD
1290	aio_fchmod = EIO_FCHMOD
1291	aio_mkdir = EIO_MKDIR
1292	PPCODE:
1293	{
1294	dREQ;
1295
1296	req->type = type;
1297	req->int2 = mode;
1298	req->sv1 = newSVsv (fh_or_path);
1299
1300	if (ix == EIO_FCHMOD)
1301	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1302	else
1303	req->ptr1 = SvPVbyte_nolen (req->sv1);
1304
1305	EIO_SEND;
1306	}
1307
1308	void
1309	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
1310	PPCODE:
1311	{
1312	dREQ;
1313
1314	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1315	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1316	req->sv1 = newSVsv (fh_or_path);
1317
1318	if (SvPOK (fh_or_path))
1319	{
1320	req->type = EIO_CHOWN;
1321	req->ptr1 = SvPVbyte_nolen (req->sv1);
1322	}
1323	else
1324	{
1325	req->type = EIO_FCHOWN;
1326	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1327	}
1328
1329	EIO_SEND;
1330	}
1331
1332	void
1333	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1334	ALIAS:
1335	aio_unlink = EIO_UNLINK
1336	aio_rmdir = EIO_RMDIR
1337	aio_readdir = EIO_READDIR
1338	PPCODE:
1339	{
1340	dREQ;
1341
1342	req->type = ix;
1343	req->sv1 = newSVsv (pathname);
1344	req->ptr1 = SvPVbyte_nolen (req->sv1);
1345
1346	EIO_SEND;
1347	}
1348
1349	void
1350	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1351	ALIAS:
1352	aio_link = EIO_LINK
1353	aio_symlink = EIO_SYMLINK
1354	aio_rename = EIO_RENAME
1355	PPCODE:
1356	{
1357	dREQ;
1358
1359	req->type = ix;
1360	req->sv1 = newSVsv (oldpath);
1361	req->ptr1 = SvPVbyte_nolen (req->sv1);
1362	req->sv2 = newSVsv (newpath);
1363	req->ptr2 = SvPVbyte_nolen (req->sv2);
1364
1365	EIO_SEND;
1366	}
1367
1368	void
1369	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1370	PPCODE:
1371	{
1372	dREQ;
1373
1374	req->type = EIO_MKNOD;
1375	req->sv1 = newSVsv (pathname);
1376	req->ptr1 = SvPVbyte_nolen (req->sv1);
1377	req->int2 = (mode_t)mode;
1378	req->offs = dev;
1379
1380	EIO_SEND;
1381	}
1382
1383	void
1384	aio_busy (double delay, SV *callback=&PL_sv_undef)
1385	PPCODE:
1386	{
1387	dREQ;
1388
1389	req->type = EIO_BUSY;
1390	req->nv1 = delay < 0. ? 0. : delay;
1391
1392	EIO_SEND;
1393	}
1394
1395	void
1396	aio_group (SV *callback=&PL_sv_undef)
1397	PROTOTYPE: ;$
1398	PPCODE:
1399	{
1400	dREQ;
1401
1402	req->type = EIO_GROUP;
1403
1404	req_send (req);
1405	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1406	}
1407
1408	void
1409	aio_nop (SV *callback=&PL_sv_undef)
1410	ALIAS:
1411	aio_nop = EIO_NOP
1412	aio_sync = EIO_SYNC
1413	PPCODE:
1414	{
1415	dREQ;
1416
1417	#endif
1418
1419	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)
1420	{	2389	{
1421	grp->int2 = limit;	2390	grp->int2 = limit;
1422	grp->feed = feed;	2391	grp->feed = feed;
1423		2392
1424	grp_try_feed (grp);	2393	grp_try_feed (grp);
1425	}	2394	}
1426		2395
		2396	void
1427	void eio_grp_limit (eio_req *grp, int limit)	2397	eio_grp_limit (eio_req *grp, int limit)
1428	{	2398	{
1429	grp->int2 = limit;	2399	grp->int2 = limit;
1430		2400
1431	grp_try_feed (grp);	2401	grp_try_feed (grp);
1432	}	2402	}
1433		2403
		2404	void
1434	void eio_grp_add (eio_req *grp, eio_req *req)	2405	eio_grp_add (eio_req *grp, eio_req *req)
1435	{	2406	{
1436	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;
1437		2410
1438	++grp->size;	2411	++grp->size;
1439	req->grp = grp;	2412	req->grp = grp;
1440		2413
1441	req->grp_prev = 0;	2414	req->grp_prev = 0;
…		…
1445	grp->grp_first->grp_prev = req;	2418	grp->grp_first->grp_prev = req;
1446		2419
1447	grp->grp_first = req;	2420	grp->grp_first = req;
1448	}	2421	}
1449		2422
		2423	/*****************************************************************************/
		2424	/* misc garbage */
1450		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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