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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 1.90 by root, Sat Jul 16 16:46:10 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	static void eio_destroy (eio_req *req);
18		77
19	#ifndef EIO_FINISH	78	#ifndef EIO_FINISH
20	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0	79	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
21	#endif	80	#endif
22		81
…		…
26		85
27	#ifndef EIO_FEED	86	#ifndef EIO_FEED
28	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)	87	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)
29	#endif	88	#endif
30		89
		90	#ifndef EIO_FD_TO_WIN32_HANDLE
		91	# define EIO_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		92	#endif
		93	#ifndef EIO_WIN32_HANDLE_TO_FD
		94	# define EIO_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		95	#endif
		96
		97	#define EIO_ERRNO(errval,retval) ((errno = errval), retval)
		98
		99	#define EIO_ENOSYS() EIO_ERRNO (ENOSYS, -1)
		100
31	#ifdef _WIN32	101	#ifdef _WIN32
32		102
33	/*doh*/	103	#undef PAGESIZE
		104	#define PAGESIZE 4096 /* GetSystemInfo? */
		105
		106	#ifdef EIO_STRUCT_STATI64
		107	#define stat(path,buf) _stati64 (path,buf)
		108	#define fstat(fd,buf) _fstati64 (path,buf)
		109	#endif
		110	#define lstat(path,buf) stat (path,buf)
		111	#define fsync(fd) (FlushFileBuffers ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1))
		112	#define mkdir(path,mode) _mkdir (path)
		113	#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))
		114
		115	#define chmod(path,mode) _chmod (path, mode)
		116	#define fchmod(fd,mode) EIO_ENOSYS ()
		117	#define chown(path,uid,gid) EIO_ENOSYS ()
		118	#define fchown(fd,uid,gid) EIO_ENOSYS ()
		119	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
		120	#define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */
		121	#define mknod(path,mode,dev) EIO_ENOSYS ()
		122	#define sync() EIO_ENOSYS ()
		123	#define readlink(path,buf,s) EIO_ENOSYS ()
		124	#define statvfs(path,buf) EIO_ENOSYS ()
		125	#define fstatvfs(fd,buf) EIO_ENOSYS ()
		126
		127	/* we could even stat and see if it exists */
		128	static int
		129	symlink (const char *old, const char *neu)
		130	{
		131	#if WINVER >= 0x0600
		132	if (CreateSymbolicLink (neu, old, 1))
		133	return 0;
		134
		135	if (CreateSymbolicLink (neu, old, 0))
		136	return 0;
		137	#endif
		138
		139	return EIO_ERRNO (ENOENT, -1);
		140	}
		141
		142	/* POSIX API only */
		143	#define CreateHardLink(neu,old) 0
		144	#define CreateSymbolicLink(neu,old,flags) 0
		145
		146	struct statvfs
		147	{
		148	int dummy;
		149	};
34		150
35	#else	151	#else
36		152
37	# include "config.h"
38	# include <sys/time.h>	153	#include <sys/time.h>
39	# include <sys/select.h>	154	#include <sys/select.h>
		155	#include <sys/statvfs.h>
40	# include <unistd.h>	156	#include <unistd.h>
41	# include <utime.h>	157	#include <utime.h>
42	# include <signal.h>	158	#include <signal.h>
		159	#include <dirent.h>
43		160
		161	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		162	#include <sys/mman.h>
		163	#endif
		164
		165	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
		166	#if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__
		167	#define _DIRENT_HAVE_D_TYPE /* sigh */
		168	#define D_INO(de) (de)->d_fileno
		169	#define D_NAMLEN(de) (de)->d_namlen
		170	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
		171	#define D_INO(de) (de)->d_ino
		172	#endif
		173
		174	#ifdef _D_EXACT_NAMLEN
		175	#undef D_NAMLEN
		176	#define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
		177	#endif
		178
		179	#ifdef _DIRENT_HAVE_D_TYPE
		180	#define D_TYPE(de) (de)->d_type
		181	#endif
		182
44	# ifndef EIO_STRUCT_DIRENT	183	#ifndef EIO_STRUCT_DIRENT
45	# define EIO_STRUCT_DIRENT struct dirent	184	#define EIO_STRUCT_DIRENT struct dirent
		185	#endif
		186
46	# endif	187	#endif
47
48	#endif
49
50	# ifndef EIO_STRUCT_STAT
51	# define EIO_STRUCT_STAT struct stat
52	# endif
53		188
54	#if HAVE_SENDFILE	189	#if HAVE_SENDFILE
55	# if __linux	190	# if __linux
56	# include <sys/sendfile.h>	191	# include <sys/sendfile.h>
57	# elif __freebsd	192	# elif __FreeBSD__ || defined __APPLE__
58	# include <sys/socket.h>	193	# include <sys/socket.h>
59	# include <sys/uio.h>	194	# include <sys/uio.h>
60	# elif __hpux	195	# elif __hpux
61	# include <sys/socket.h>	196	# include <sys/socket.h>
62	# elif __solaris /* not yet */	197	# elif __solaris
63	# include <sys/sendfile.h>	198	# include <sys/sendfile.h>
64	# else	199	# else
65	# error sendfile support requested but not available	200	# error sendfile support requested but not available
66	# endif	201	# endif
67	#endif	202	#endif
68		203
69	/* number of seconds after which an idle threads exit */	204	#ifndef D_TYPE
70	#define IDLE_TIMEOUT 10	205	# define D_TYPE(de) 0
		206	#endif
		207	#ifndef D_INO
		208	# define D_INO(de) 0
		209	#endif
		210	#ifndef D_NAMLEN
		211	# define D_NAMLEN(de) strlen ((de)->d_name)
		212	#endif
71		213
72	/* used for struct dirent, AIX doesn't provide it */	214	/* used for struct dirent, AIX doesn't provide it */
73	#ifndef NAME_MAX	215	#ifndef NAME_MAX
74	# define NAME_MAX 4096	216	# define NAME_MAX 4096
75	#endif	217	#endif
76		218
		219	/* used for readlink etc. */
		220	#ifndef PATH_MAX
		221	# define PATH_MAX 4096
		222	#endif
		223
77	/* buffer size for various temporary buffers */	224	/* buffer size for various temporary buffers */
78	#define EIO_BUFSIZE 65536	225	#define EIO_BUFSIZE 65536
79		226
80	#define dBUF \	227	#define dBUF \
81	char *eio_buf; \	228	char *eio_buf; \
82	X_LOCK (wrklock); \	229	ETP_WORKER_LOCK (self); \
83	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	230	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \
84	X_UNLOCK (wrklock); \	231	ETP_WORKER_UNLOCK (self); \
		232	errno = ENOMEM; \
85	if (!eio_buf) \	233	if (!eio_buf) \
86	return -1;	234	return -1;
87		235
88	#define EIO_TICKS ((1000000 + 1023) >> 10)	236	#define EIO_TICKS ((1000000 + 1023) >> 10)
89		237
		238	#define ETP_PRI_MIN EIO_PRI_MIN
		239	#define ETP_PRI_MAX EIO_PRI_MAX
		240
		241	struct etp_worker;
		242
		243	#define ETP_REQ eio_req
		244	#define ETP_DESTROY(req) eio_destroy (req)
		245	static int eio_finish (eio_req *req);
		246	#define ETP_FINISH(req) eio_finish (req)
		247	static void eio_execute (struct etp_worker *self, eio_req *req);
		248	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)
		249
		250	#define ETP_WORKER_CLEAR(req) \
		251	if (wrk->dbuf) \
		252	{ \
		253	free (wrk->dbuf); \
		254	wrk->dbuf = 0; \
		255	} \
		256	\
		257	if (wrk->dirp) \
		258	{ \
		259	closedir (wrk->dirp); \
		260	wrk->dirp = 0; \
		261	}
		262
		263	#define ETP_WORKER_COMMON \
		264	void *dbuf; \
		265	DIR *dirp;
		266
		267	/*****************************************************************************/
		268
		269	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
		270
		271	/* calculate time difference in ~1/EIO_TICKS of a second */
		272	ecb_inline int
		273	tvdiff (struct timeval *tv1, struct timeval *tv2)
		274	{
		275	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
		276	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		277	}
		278
		279	static unsigned int started, idle, wanted = 4;
		280
90	static void (*want_poll_cb) (void);	281	static void (*want_poll_cb) (void);
91	static void (*done_poll_cb) (void);	282	static void (*done_poll_cb) (void);
92		283
93	static unsigned int max_poll_time = 0;	284	static unsigned int max_poll_time; /* reslock */
94	static unsigned int max_poll_reqs = 0;	285	static unsigned int max_poll_reqs; /* reslock */
95		286
96	/* calculcate time difference in ~1/EIO_TICKS of a second */	287	static volatile unsigned int nreqs; /* reqlock */
97	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	288	static volatile unsigned int nready; /* reqlock */
98	{	289	static volatile unsigned int npending; /* reqlock */
99	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	290	static volatile unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */
100	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);	291	static volatile unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */
101	}
102		292
103	static unsigned int started, idle, wanted;	293	static xmutex_t wrklock;
		294	static xmutex_t reslock;
		295	static xmutex_t reqlock;
		296	static xcond_t reqwait;
		297
		298	#if !HAVE_PREADWRITE
		299	/*
		300	* make our pread/pwrite emulation safe against themselves, but not against
		301	* normal read/write by using a mutex. slows down execution a lot,
		302	* but that's your problem, not mine.
		303	*/
		304	static xmutex_t preadwritelock = X_MUTEX_INIT;
		305	#endif
		306
		307	typedef struct etp_worker
		308	{
		309	/* locked by wrklock */
		310	struct etp_worker *prev, *next;
		311
		312	xthread_t tid;
		313
		314	/* locked by reslock, reqlock or wrklock */
		315	ETP_REQ *req; /* currently processed request */
		316
		317	ETP_WORKER_COMMON
		318	} etp_worker;
		319
		320	static etp_worker wrk_first = { &wrk_first, &wrk_first, 0 }; /* NOT etp */
		321
		322	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
		323	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
104		324
105	/* worker threads management */	325	/* worker threads management */
106	static mutex_t wrklock = X_MUTEX_INIT;
107		326
108	typedef struct worker {	327	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)	328	etp_worker_clear (etp_worker *wrk)
123	{	329	{
124	if (wrk->dirp)	330	ETP_WORKER_CLEAR (wrk);
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	}	331	}
136		332
137	static void worker_free (worker *wrk)	333	static void ecb_cold
		334	etp_worker_free (etp_worker *wrk)
138	{	335	{
139	wrk->next->prev = wrk->prev;	336	wrk->next->prev = wrk->prev;
140	wrk->prev->next = wrk->next;	337	wrk->prev->next = wrk->next;
141		338
142	free (wrk);	339	free (wrk);
143	}	340	}
144		341
145	static volatile unsigned int nreqs, nready, npending;	342	static unsigned int
146	static volatile unsigned int max_idle = 4;	343	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	{	344	{
		345	int retval;
		346	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		347	retval = nreqs;
		348	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
154	return nreqs;	349	return retval;
155	}	350	}
156		351
157	unsigned int eio_nready (void)	352	static unsigned int
		353	etp_nready (void)
158	{	354	{
159	unsigned int retval;	355	unsigned int retval;
160		356
161	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	357	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
162	retval = nready;	358	retval = nready;
163	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	359	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
164		360
165	return retval;	361	return retval;
166	}	362	}
167		363
168	unsigned int eio_npending (void)	364	static unsigned int
		365	etp_npending (void)
169	{	366	{
170	unsigned int retval;	367	unsigned int retval;
171		368
172	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	369	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
173	retval = npending;	370	retval = npending;
174	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	371	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
175		372
176	return retval;	373	return retval;
177	}	374	}
178		375
179	unsigned int eio_nthreads (void)	376	static unsigned int
		377	etp_nthreads (void)
180	{	378	{
181	unsigned int retval;	379	unsigned int retval;
182		380
183	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	381	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
184	retval = started;	382	retval = started;
…		…
191	* a somewhat faster data structure might be nice, but	389	* a somewhat faster data structure might be nice, but
192	* with 8 priorities this actually needs <20 insns	390	* with 8 priorities this actually needs <20 insns
193	* per shift, the most expensive operation.	391	* per shift, the most expensive operation.
194	*/	392	*/
195	typedef struct {	393	typedef struct {
196	eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */	394	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
197	int size;	395	int size;
198	} reqq;	396	} etp_reqq;
199		397
200	static reqq req_queue;	398	static etp_reqq req_queue;
201	static reqq res_queue;	399	static etp_reqq res_queue;
202		400
203	static int reqq_push (reqq *q, eio_req *req)	401	static int ecb_noinline
		402	reqq_push (etp_reqq *q, ETP_REQ *req)
204	{	403	{
205	int pri = req->pri;	404	int pri = req->pri;
206	req->next = 0;	405	req->next = 0;
207		406
208	if (q->qe[pri])	407	if (q->qe[pri])
…		…
214	q->qe[pri] = q->qs[pri] = req;	413	q->qe[pri] = q->qs[pri] = req;
215		414
216	return q->size++;	415	return q->size++;
217	}	416	}
218		417
219	static eio_req *reqq_shift (reqq *q)	418	static ETP_REQ * ecb_noinline
		419	reqq_shift (etp_reqq *q)
220	{	420	{
221	int pri;	421	int pri;
222		422
223	if (!q->size)	423	if (!q->size)
224	return 0;	424	return 0;
225		425
226	--q->size;	426	--q->size;
227		427
228	for (pri = EIO_NUM_PRI; pri--; )	428	for (pri = ETP_NUM_PRI; pri--; )
229	{	429	{
230	eio_req *req = q->qs[pri];	430	eio_req *req = q->qs[pri];
231		431
232	if (req)	432	if (req)
233	{	433	{
…		…
239	}	439	}
240		440
241	abort ();	441	abort ();
242	}	442	}
243		443
244	static void grp_try_feed (eio_req *grp)	444	static void ecb_cold
		445	etp_thread_init (void)
245	{	446	{
246	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	447	#if !HAVE_PREADWRITE
		448	X_MUTEX_CREATE (preadwritelock);
		449	#endif
		450	X_MUTEX_CREATE (wrklock);
		451	X_MUTEX_CREATE (reslock);
		452	X_MUTEX_CREATE (reqlock);
		453	X_COND_CREATE (reqwait);
		454	}
		455
		456	static void ecb_cold
		457	etp_atfork_prepare (void)
		458	{
		459	}
		460
		461	static void ecb_cold
		462	etp_atfork_parent (void)
		463	{
		464	}
		465
		466	static void ecb_cold
		467	etp_atfork_child (void)
		468	{
		469	ETP_REQ *prv;
		470
		471	while ((prv = reqq_shift (&req_queue)))
		472	ETP_DESTROY (prv);
		473
		474	while ((prv = reqq_shift (&res_queue)))
		475	ETP_DESTROY (prv);
		476
		477	while (wrk_first.next != &wrk_first)
247	{	478	{
248	int old_len = grp->size;	479	etp_worker *wrk = wrk_first.next;
249		480
250	EIO_FEED (grp);	481	if (wrk->req)
		482	ETP_DESTROY (wrk->req);
251		483
252	/* stop if no progress has been made */	484	etp_worker_clear (wrk);
253	if (old_len == grp->size)	485	etp_worker_free (wrk);
254	{
255	grp->feed = 0;
256	break;
257	}
258	}	486	}
259	}
260		487
261	static int eio_finish (eio_req *req);	488	started = 0;
		489	idle = 0;
		490	nreqs = 0;
		491	nready = 0;
		492	npending = 0;
262		493
263	static int grp_dec (eio_req *grp)	494	etp_thread_init ();
264	{	495	}
265	--grp->size;
266		496
267	/* call feeder, if applicable */	497	static void ecb_cold
268	grp_try_feed (grp);	498	etp_once_init (void)
		499	{
		500	etp_thread_init ();
		501	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
		502	}
269		503
270	/* finish, if done */	504	static int ecb_cold
271	if (!grp->size && grp->int1)	505	etp_init (void (*want_poll)(void), void (*done_poll)(void))
272	return eio_finish (grp);	506	{
273	else	507	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
		508
		509	pthread_once (&doinit, etp_once_init);
		510
		511	want_poll_cb = want_poll;
		512	done_poll_cb = done_poll;
		513
274	return 0;	514	return 0;
275	}	515	}
276		516
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);	517	X_THREAD_PROC (etp_proc);
326		518
327	static void start_thread (void)	519	static void ecb_cold
		520	etp_start_thread (void)
328	{	521	{
329	worker *wrk = calloc (1, sizeof (worker));	522	etp_worker *wrk = calloc (1, sizeof (etp_worker));
330		523
331	if (!wrk)	524	/*TODO*/
332	croak ("unable to allocate worker thread data");	525	assert (("unable to allocate worker thread data", wrk));
333		526
334	X_LOCK (wrklock);	527	X_LOCK (wrklock);
335		528
336	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))	529	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
337	{	530	{
338	wrk->prev = &wrk_first;	531	wrk->prev = &wrk_first;
339	wrk->next = wrk_first.next;	532	wrk->next = wrk_first.next;
340	wrk_first.next->prev = wrk;	533	wrk_first.next->prev = wrk;
341	wrk_first.next = wrk;	534	wrk_first.next = wrk;
…		…
345	free (wrk);	538	free (wrk);
346		539
347	X_UNLOCK (wrklock);	540	X_UNLOCK (wrklock);
348	}	541	}
349		542
		543	static void
350	static void maybe_start_thread (void)	544	etp_maybe_start_thread (void)
351	{	545	{
352	if (eio_nthreads () >= wanted)	546	if (ecb_expect_true (etp_nthreads () >= wanted))
353	return;	547	return;
354		548
355	/* todo: maybe use idle here, but might be less exact */	549	/* todo: maybe use idle here, but might be less exact */
356	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())	550	if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
357	return;	551	return;
358		552
359	start_thread ();	553	etp_start_thread ();
360	}	554	}
361		555
362	void eio_submit (eio_req *req)	556	static void ecb_cold
363	{	557	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	{	558	{
377	eio_req *req = calloc (1, sizeof (eio_req));	559	eio_req *req = calloc (1, sizeof (eio_req));
378		560
379	req->type = EIO_QUIT;	561	req->type = -1;
380	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	562	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
381		563
382	X_LOCK (reqlock);	564	X_LOCK (reqlock);
383	reqq_push (&req_queue, req);	565	reqq_push (&req_queue, req);
384	X_COND_SIGNAL (reqwait);	566	X_COND_SIGNAL (reqwait);
385	X_UNLOCK (reqlock);	567	X_UNLOCK (reqlock);
…		…
387	X_LOCK (wrklock);	569	X_LOCK (wrklock);
388	--started;	570	--started;
389	X_UNLOCK (wrklock);	571	X_UNLOCK (wrklock);
390	}	572	}
391		573
392	void eio_set_max_poll_time (double nseconds)	574	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)	575	etp_poll (void)
429	{	576	{
430	int maxreqs = max_poll_reqs;	577	unsigned int maxreqs;
		578	unsigned int maxtime;
431	struct timeval tv_start, tv_now;	579	struct timeval tv_start, tv_now;
432	eio_req *req;
433		580
		581	X_LOCK (reslock);
		582	maxreqs = max_poll_reqs;
		583	maxtime = max_poll_time;
		584	X_UNLOCK (reslock);
		585
434	if (max_poll_time)	586	if (maxtime)
435	gettimeofday (&tv_start, 0);	587	gettimeofday (&tv_start, 0);
436		588
437	for (;;)	589	for (;;)
438	{	590	{
		591	ETP_REQ *req;
		592
439	maybe_start_thread ();	593	etp_maybe_start_thread ();
440		594
441	X_LOCK (reslock);	595	X_LOCK (reslock);
442	req = reqq_shift (&res_queue);	596	req = reqq_shift (&res_queue);
443		597
444	if (req)	598	if (req)
…		…
452	X_UNLOCK (reslock);	606	X_UNLOCK (reslock);
453		607
454	if (!req)	608	if (!req)
455	return 0;	609	return 0;
456		610
		611	X_LOCK (reqlock);
457	--nreqs;	612	--nreqs;
		613	X_UNLOCK (reqlock);
458		614
459	if (req->type == EIO_GROUP && req->size)	615	if (ecb_expect_false (req->type == EIO_GROUP && req->size))
460	{	616	{
461	req->int1 = 1; /* mark request as delayed */	617	req->int1 = 1; /* mark request as delayed */
462	continue;	618	continue;
463	}	619	}
464	else	620	else
465	{	621	{
466	int res = eio_finish (req);	622	int res = ETP_FINISH (req);
467	if (res)	623	if (ecb_expect_false (res))
468	return res;	624	return res;
469	}	625	}
470		626
471	if (maxreqs && !--maxreqs)	627	if (ecb_expect_false (maxreqs && !--maxreqs))
472	break;	628	break;
473		629
474	if (max_poll_time)	630	if (maxtime)
475	{	631	{
476	gettimeofday (&tv_now, 0);	632	gettimeofday (&tv_now, 0);
477		633
478	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)	634	if (tvdiff (&tv_start, &tv_now) >= maxtime)
479	break;	635	break;
480	}	636	}
481	}	637	}
482		638
483	errno = EAGAIN;	639	errno = EAGAIN;
484	return -1;	640	return -1;
485	}	641	}
486		642
		643	static void
		644	etp_cancel (ETP_REQ *req)
		645	{
		646	req->cancelled = 1;
		647
		648	eio_grp_cancel (req);
		649	}
		650
		651	static void
		652	etp_submit (ETP_REQ *req)
		653	{
		654	req->pri -= ETP_PRI_MIN;
		655
		656	if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
		657	if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
		658
		659	if (ecb_expect_false (req->type == EIO_GROUP))
		660	{
		661	/* I hope this is worth it :/ */
		662	X_LOCK (reqlock);
		663	++nreqs;
		664	X_UNLOCK (reqlock);
		665
		666	X_LOCK (reslock);
		667
		668	++npending;
		669
		670	if (!reqq_push (&res_queue, req) && want_poll_cb)
		671	want_poll_cb ();
		672
		673	X_UNLOCK (reslock);
		674	}
		675	else
		676	{
		677	X_LOCK (reqlock);
		678	++nreqs;
		679	++nready;
		680	reqq_push (&req_queue, req);
		681	X_COND_SIGNAL (reqwait);
		682	X_UNLOCK (reqlock);
		683
		684	etp_maybe_start_thread ();
		685	}
		686	}
		687
		688	static void ecb_cold
		689	etp_set_max_poll_time (double nseconds)
		690	{
		691	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		692	max_poll_time = nseconds * EIO_TICKS;
		693	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		694	}
		695
		696	static void ecb_cold
		697	etp_set_max_poll_reqs (unsigned int maxreqs)
		698	{
		699	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		700	max_poll_reqs = maxreqs;
		701	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		702	}
		703
		704	static void ecb_cold
		705	etp_set_max_idle (unsigned int nthreads)
		706	{
		707	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		708	max_idle = nthreads;
		709	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		710	}
		711
		712	static void ecb_cold
		713	etp_set_idle_timeout (unsigned int seconds)
		714	{
		715	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		716	idle_timeout = seconds;
		717	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		718	}
		719
		720	static void ecb_cold
		721	etp_set_min_parallel (unsigned int nthreads)
		722	{
		723	if (wanted < nthreads)
		724	wanted = nthreads;
		725	}
		726
		727	static void ecb_cold
		728	etp_set_max_parallel (unsigned int nthreads)
		729	{
		730	if (wanted > nthreads)
		731	wanted = nthreads;
		732
		733	while (started > wanted)
		734	etp_end_thread ();
		735	}
		736
		737	/*****************************************************************************/
		738
		739	static void
		740	grp_try_feed (eio_req *grp)
		741	{
		742	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
		743	{
		744	grp->flags &= ~EIO_FLAG_GROUPADD;
		745
		746	EIO_FEED (grp);
		747
		748	/* stop if no progress has been made */
		749	if (!(grp->flags & EIO_FLAG_GROUPADD))
		750	{
		751	grp->feed = 0;
		752	break;
		753	}
		754	}
		755	}
		756
		757	static int
		758	grp_dec (eio_req *grp)
		759	{
		760	--grp->size;
		761
		762	/* call feeder, if applicable */
		763	grp_try_feed (grp);
		764
		765	/* finish, if done */
		766	if (!grp->size && grp->int1)
		767	return eio_finish (grp);
		768	else
		769	return 0;
		770	}
		771
		772	static void
		773	eio_destroy (eio_req *req)
		774	{
		775	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
		776	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
		777
		778	EIO_DESTROY (req);
		779	}
		780
		781	static int
		782	eio_finish (eio_req *req)
		783	{
		784	int res = EIO_FINISH (req);
		785
		786	if (req->grp)
		787	{
		788	int res2;
		789	eio_req *grp = req->grp;
		790
		791	/* unlink request */
		792	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		793	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		794
		795	if (grp->grp_first == req)
		796	grp->grp_first = req->grp_next;
		797
		798	res2 = grp_dec (grp);
		799
		800	if (!res)
		801	res = res2;
		802	}
		803
		804	eio_destroy (req);
		805
		806	return res;
		807	}
		808
		809	void
		810	eio_grp_cancel (eio_req *grp)
		811	{
		812	for (grp = grp->grp_first; grp; grp = grp->grp_next)
		813	eio_cancel (grp);
		814	}
		815
		816	void
		817	eio_cancel (eio_req *req)
		818	{
		819	etp_cancel (req);
		820	}
		821
		822	void
		823	eio_submit (eio_req *req)
		824	{
		825	etp_submit (req);
		826	}
		827
		828	unsigned int
		829	eio_nreqs (void)
		830	{
		831	return etp_nreqs ();
		832	}
		833
		834	unsigned int
		835	eio_nready (void)
		836	{
		837	return etp_nready ();
		838	}
		839
		840	unsigned int
		841	eio_npending (void)
		842	{
		843	return etp_npending ();
		844	}
		845
		846	unsigned int ecb_cold
		847	eio_nthreads (void)
		848	{
		849	return etp_nthreads ();
		850	}
		851
		852	void ecb_cold
		853	eio_set_max_poll_time (double nseconds)
		854	{
		855	etp_set_max_poll_time (nseconds);
		856	}
		857
		858	void ecb_cold
		859	eio_set_max_poll_reqs (unsigned int maxreqs)
		860	{
		861	etp_set_max_poll_reqs (maxreqs);
		862	}
		863
		864	void ecb_cold
		865	eio_set_max_idle (unsigned int nthreads)
		866	{
		867	etp_set_max_idle (nthreads);
		868	}
		869
		870	void ecb_cold
		871	eio_set_idle_timeout (unsigned int seconds)
		872	{
		873	etp_set_idle_timeout (seconds);
		874	}
		875
		876	void ecb_cold
		877	eio_set_min_parallel (unsigned int nthreads)
		878	{
		879	etp_set_min_parallel (nthreads);
		880	}
		881
		882	void ecb_cold
		883	eio_set_max_parallel (unsigned int nthreads)
		884	{
		885	etp_set_max_parallel (nthreads);
		886	}
		887
		888	int eio_poll (void)
		889	{
		890	return etp_poll ();
		891	}
		892
487	/*****************************************************************************/	893	/*****************************************************************************/
488	/* work around various missing functions */	894	/* work around various missing functions */
489		895
490	#if !HAVE_PREADWRITE	896	#if !HAVE_PREADWRITE
		897	# undef pread
		898	# undef pwrite
491	# define pread aio_pread	899	# define pread eio__pread
492	# define pwrite aio_pwrite	900	# define pwrite eio__pwrite
493		901
494	/*	902	static eio_ssize_t
495	* make our pread/pwrite safe against themselves, but not against	903	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	{	904	{
503	ssize_t res;	905	eio_ssize_t res;
504	off_t ooffset;	906	off_t ooffset;
505		907
506	X_LOCK (preadwritelock);	908	X_LOCK (preadwritelock);
507	ooffset = lseek (fd, 0, SEEK_CUR);	909	ooffset = lseek (fd, 0, SEEK_CUR);
508	lseek (fd, offset, SEEK_SET);	910	lseek (fd, offset, SEEK_SET);
…		…
511	X_UNLOCK (preadwritelock);	913	X_UNLOCK (preadwritelock);
512		914
513	return res;	915	return res;
514	}	916	}
515		917
516	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	918	static eio_ssize_t
		919	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
517	{	920	{
518	ssize_t res;	921	eio_ssize_t res;
519	off_t ooffset;	922	off_t ooffset;
520		923
521	X_LOCK (preadwritelock);	924	X_LOCK (preadwritelock);
522	ooffset = lseek (fd, 0, SEEK_CUR);	925	ooffset = lseek (fd, 0, SEEK_CUR);
523	lseek (fd, offset, SEEK_SET);	926	lseek (fd, offset, SEEK_SET);
524	res = write (fd, buf, count);	927	res = write (fd, buf, count);
525	lseek (fd, offset, SEEK_SET);	928	lseek (fd, ooffset, SEEK_SET);
526	X_UNLOCK (preadwritelock);	929	X_UNLOCK (preadwritelock);
527		930
528	return res;	931	return res;
529	}	932	}
530	#endif	933	#endif
531		934
532	#ifndef HAVE_FUTIMES	935	#ifndef HAVE_UTIMES
533		936
		937	# undef utimes
534	# define utimes(path,times) aio_utimes (path, times)	938	# define utimes(path,times) eio__utimes (path, times)
535	# define futimes(fd,times) aio_futimes (fd, times)
536		939
		940	static int
537	static int aio_utimes (const char *filename, const struct timeval times[2])	941	eio__utimes (const char *filename, const struct timeval times[2])
538	{	942	{
539	if (times)	943	if (times)
540	{	944	{
541	struct utimbuf buf;	945	struct utimbuf buf;
542		946
…		…
547	}	951	}
548	else	952	else
549	return utime (filename, 0);	953	return utime (filename, 0);
550	}	954	}
551		955
		956	#endif
		957
		958	#ifndef HAVE_FUTIMES
		959
		960	# undef futimes
		961	# define futimes(fd,times) eio__futimes (fd, times)
		962
		963	static int
552	static int aio_futimes (int fd, const struct timeval tv[2])	964	eio__futimes (int fd, const struct timeval tv[2])
553	{	965	{
554	errno = ENOSYS;	966	errno = ENOSYS;
555	return -1;	967	return -1;
556	}	968	}
557		969
558	#endif	970	#endif
559		971
560	#if !HAVE_FDATASYNC	972	#if !HAVE_FDATASYNC
		973	# undef fdatasync
561	# define fdatasync fsync	974	# define fdatasync(fd) fsync (fd)
562	#endif	975	#endif
		976
		977	/* sync_file_range always needs emulation */
		978	static int
		979	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
		980	{
		981	#if HAVE_SYNC_FILE_RANGE
		982	int res;
		983
		984	if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE
		985	|| EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE
		986	|| EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER)
		987	{
		988	flags = 0
		989	| (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0)
		990	| (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0)
		991	| (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0);
		992	}
		993
		994	res = sync_file_range (fd, offset, nbytes, flags);
		995
		996	if (!res || errno != ENOSYS)
		997	return res;
		998	#endif
		999
		1000	/* even though we could play tricks with the flags, it's better to always
		1001	* call fdatasync, as that matches the expectation of its users best */
		1002	return fdatasync (fd);
		1003	}
		1004
		1005	static int
		1006	eio__fallocate (int fd, int mode, off_t offset, size_t len)
		1007	{
		1008	#if HAVE_FALLOCATE
		1009	return fallocate (fd, mode, offset, len);
		1010	#else
		1011	errno = ENOSYS;
		1012	return -1;
		1013	#endif
		1014	}
563		1015
564	#if !HAVE_READAHEAD	1016	#if !HAVE_READAHEAD
		1017	# undef readahead
565	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	1018	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
566		1019
		1020	static eio_ssize_t
567	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)	1021	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
568	{	1022	{
569	size_t todo = count;	1023	size_t todo = count;
570	dBUF;	1024	dBUF;
571		1025
572	while (todo > 0)	1026	while (todo > 0)
573	{	1027	{
574	size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE;	1028	size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE;
575		1029
576	pread (fd, aio_buf, len, offset);	1030	pread (fd, eio_buf, len, offset);
577	offset += len;	1031	offset += len;
578	todo -= len;	1032	todo -= len;
579	}	1033	}
580		1034
581	errno = 0;	1035	errno = 0;
582	return count;	1036	return count;
583	}	1037	}
584		1038
585	#endif	1039	#endif
586		1040
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 */	1041	/* sendfile always needs emulation */
		1042	static eio_ssize_t
618	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)	1043	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)
619	{	1044	{
		1045	eio_ssize_t written = 0;
620	ssize_t res;	1046	eio_ssize_t res;
621		1047
622	if (!count)	1048	if (!count)
623	return 0;	1049	return 0;
624		1050
		1051	for (;;)
		1052	{
		1053	#ifdef __APPLE__
		1054	# undef HAVE_SENDFILE /* broken, as everything on os x */
		1055	#endif
625	#if HAVE_SENDFILE	1056	#if HAVE_SENDFILE
626	# if __linux	1057	# if __linux
		1058	off_t soffset = offset;
627	res = sendfile (ofd, ifd, &offset, count);	1059	res = sendfile (ofd, ifd, &soffset, count);
628		1060
629	# elif __freebsd	1061	# elif __FreeBSD__
630	/*	1062	/*
631	* Of course, the freebsd sendfile is a dire hack with no thoughts	1063	* Of course, the freebsd sendfile is a dire hack with no thoughts
632	* wasted on making it similar to other I/O functions.	1064	* wasted on making it similar to other I/O functions.
633	*/	1065	*/
634	{
635	off_t sbytes;	1066	off_t sbytes;
636	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	1067	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
637		1068
638	if (res < 0 && sbytes)	1069	#if 0 /* according to the manpage, this is correct, but broken behaviour */
639	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */	1070	/* freebsd' sendfile will return 0 on success */
		1071	/* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */
		1072	/* not on e.g. EIO or EPIPE - sounds broken */
		1073	if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0)
640	res = sbytes;	1074	res = sbytes;
641	}	1075	#endif
		1076
		1077	/* according to source inspection, this is correct, and useful behaviour */
		1078	if (sbytes)
		1079	res = sbytes;
		1080
		1081	# elif defined (__APPLE__)
		1082	off_t sbytes = count;
		1083	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
		1084
		1085	/* according to the manpage, sbytes is always valid */
		1086	if (sbytes)
		1087	res = sbytes;
642		1088
643	# elif __hpux	1089	# elif __hpux
644	res = sendfile (ofd, ifd, offset, count, 0, 0);	1090	res = sendfile (ofd, ifd, offset, count, 0, 0);
645		1091
646	# elif __solaris	1092	# elif __solaris
647	{
648	struct sendfilevec vec;	1093	struct sendfilevec vec;
649	size_t sbytes;	1094	size_t sbytes;
650		1095
651	vec.sfv_fd = ifd;	1096	vec.sfv_fd = ifd;
652	vec.sfv_flag = 0;	1097	vec.sfv_flag = 0;
653	vec.sfv_off = offset;	1098	vec.sfv_off = offset;
654	vec.sfv_len = count;	1099	vec.sfv_len = count;
655		1100
656	res = sendfilev (ofd, &vec, 1, &sbytes);	1101	res = sendfilev (ofd, &vec, 1, &sbytes);
657		1102
658	if (res < 0 && sbytes)	1103	if (res < 0 && sbytes)
659	res = sbytes;	1104	res = sbytes;
660	}
661		1105
662	# endif	1106	# endif
		1107
		1108	#elif defined (_WIN32) && 0
		1109	/* does not work, just for documentation of what would need to be done */
		1110	/* actually, cannot be done like this, as TransmitFile changes the file offset, */
		1111	/* libeio guarantees that the file offset does not change, and windows */
		1112	/* has no way to get an independent handle to the same file description */
		1113	HANDLE h = TO_SOCKET (ifd);
		1114	SetFilePointer (h, offset, 0, FILE_BEGIN);
		1115	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
		1116
663	#else	1117	#else
664	res = -1;	1118	res = -1;
665	errno = ENOSYS;	1119	errno = ENOSYS;
666	#endif	1120	#endif
667		1121
		1122	/* we assume sendfile can copy at least 128mb in one go */
		1123	if (res <= 128 * 1024 * 1024)
		1124	{
		1125	if (res > 0)
		1126	written += res;
		1127
		1128	if (written)
		1129	return written;
		1130
		1131	break;
		1132	}
		1133	else
		1134	{
		1135	/* if we requested more, then probably the kernel was lazy */
		1136	written += res;
		1137	offset += res;
		1138	count -= res;
		1139
		1140	if (!count)
		1141	return written;
		1142	}
		1143	}
		1144
668	if (res < 0	1145	if (res < 0
669	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	1146	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		1147	/* BSDs */
		1148	#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */
		1149	|| errno == ENOTSUP
		1150	#endif
		1151	#ifdef EOPNOTSUPP /* windows */
		1152	|| errno == EOPNOTSUPP /* BSDs */
		1153	#endif
670	#if __solaris	1154	#if __solaris
671	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	1155	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
672	#endif	1156	#endif
673	)	1157	)
674	)	1158	)
…		…
678		1162
679	res = 0;	1163	res = 0;
680		1164
681	while (count)	1165	while (count)
682	{	1166	{
683	ssize_t cnt;	1167	eio_ssize_t cnt;
684		1168
685	cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);	1169	cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);
686		1170
687	if (cnt <= 0)	1171	if (cnt <= 0)
688	{	1172	{
…		…
705	}	1189	}
706		1190
707	return res;	1191	return res;
708	}	1192	}
709		1193
		1194	#ifdef PAGESIZE
		1195	# define eio_pagesize() PAGESIZE
		1196	#else
		1197	static intptr_t
		1198	eio_pagesize (void)
		1199	{
		1200	static intptr_t page;
		1201
		1202	if (!page)
		1203	page = sysconf (_SC_PAGESIZE);
		1204
		1205	return page;
		1206	}
		1207	#endif
		1208
		1209	static void
		1210	eio_page_align (void **addr, size_t *length)
		1211	{
		1212	intptr_t mask = eio_pagesize () - 1;
		1213
		1214	/* round down addr */
		1215	intptr_t adj = mask & (intptr_t)*addr;
		1216
		1217	*addr = (void *)((intptr_t)*addr - adj);
		1218	*length += adj;
		1219
		1220	/* round up length */
		1221	*length = (*length + mask) & ~mask;
		1222	}
		1223
		1224	#if !_POSIX_MEMLOCK
		1225	# define eio__mlockall(a) EIO_ENOSYS ()
		1226	#else
		1227
		1228	static int
		1229	eio__mlockall (int flags)
		1230	{
		1231	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1232	extern int mallopt (int, int);
		1233	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1234	#endif
		1235
		1236	if (EIO_MCL_CURRENT != MCL_CURRENT
		1237	|| EIO_MCL_FUTURE != MCL_FUTURE)
		1238	{
		1239	flags = 0
		1240	| (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0)
		1241	| (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0);
		1242	}
		1243
		1244	return mlockall (flags);
		1245	}
		1246	#endif
		1247
		1248	#if !_POSIX_MEMLOCK_RANGE
		1249	# define eio__mlock(a,b) EIO_ENOSYS ()
		1250	#else
		1251
		1252	static int
		1253	eio__mlock (void *addr, size_t length)
		1254	{
		1255	eio_page_align (&addr, &length);
		1256
		1257	return mlock (addr, length);
		1258	}
		1259
		1260	#endif
		1261
		1262	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
		1263	# define eio__msync(a,b,c) EIO_ENOSYS ()
		1264	#else
		1265
		1266	static int
		1267	eio__msync (void *mem, size_t len, int flags)
		1268	{
		1269	eio_page_align (&mem, &len);
		1270
		1271	if (EIO_MS_ASYNC != MS_SYNC
		1272	|| EIO_MS_INVALIDATE != MS_INVALIDATE
		1273	|| EIO_MS_SYNC != MS_SYNC)
		1274	{
		1275	flags = 0
		1276	| (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
		1277	| (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
		1278	| (flags & EIO_MS_SYNC ? MS_SYNC : 0);
		1279	}
		1280
		1281	return msync (mem, len, flags);
		1282	}
		1283
		1284	#endif
		1285
		1286	static int
		1287	eio__mtouch (eio_req *req)
		1288	{
		1289	void *mem = req->ptr2;
		1290	size_t len = req->size;
		1291	int flags = req->int1;
		1292
		1293	eio_page_align (&mem, &len);
		1294
		1295	{
		1296	intptr_t addr = (intptr_t)mem;
		1297	intptr_t end = addr + len;
		1298	intptr_t page = eio_pagesize ();
		1299
		1300	if (addr < end)
		1301	if (flags & EIO_MT_MODIFY) /* modify */
		1302	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1303	else
		1304	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1305	}
		1306
		1307	return 0;
		1308	}
		1309
		1310	/*****************************************************************************/
		1311	/* requests implemented outside eio_execute, because they are so large */
		1312
		1313	static void
		1314	eio__realpath (eio_req *req, etp_worker *self)
		1315	{
		1316	char *rel = req->ptr1;
		1317	char *res;
		1318	char *tmp1, *tmp2;
		1319	#if SYMLOOP_MAX > 32
		1320	int symlinks = SYMLOOP_MAX;
		1321	#else
		1322	int symlinks = 32;
		1323	#endif
		1324
		1325	req->result = -1;
		1326
		1327	errno = EINVAL;
		1328	if (!rel)
		1329	return;
		1330
		1331	errno = ENOENT;
		1332	if (!*rel)
		1333	return;
		1334
		1335	if (!req->ptr2)
		1336	{
		1337	X_LOCK (wrklock);
		1338	req->flags |= EIO_FLAG_PTR2_FREE;
		1339	X_UNLOCK (wrklock);
		1340	req->ptr2 = malloc (PATH_MAX * 3);
		1341
		1342	errno = ENOMEM;
		1343	if (!req->ptr2)
		1344	return;
		1345	}
		1346
		1347	res = req->ptr2;
		1348	tmp1 = res + PATH_MAX;
		1349	tmp2 = tmp1 + PATH_MAX;
		1350
		1351	#if 0 /* disabled, the musl way to do things is just too racy */
		1352	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
		1353	/* on linux we may be able to ask the kernel */
		1354	{
		1355	int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME);
		1356
		1357	if (fd >= 0)
		1358	{
		1359	sprintf (tmp1, "/proc/self/fd/%d", fd);
		1360	req->result = readlink (tmp1, res, PATH_MAX);
		1361	close (fd);
		1362
		1363	/* here we should probably stat the open file and the disk file, to make sure they still match */
		1364
		1365	if (req->result > 0)
		1366	goto done;
		1367	}
		1368	else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)
		1369	return;
		1370	}
		1371	#endif
		1372	#endif
		1373
		1374	if (*rel != '/')
		1375	{
		1376	if (!getcwd (res, PATH_MAX))
		1377	return;
		1378
		1379	if (res [1]) /* only use if not / */
		1380	res += strlen (res);
		1381	}
		1382
		1383	while (*rel)
		1384	{
		1385	eio_ssize_t len, linklen;
		1386	char *beg = rel;
		1387
		1388	while (*rel && *rel != '/')
		1389	++rel;
		1390
		1391	len = rel - beg;
		1392
		1393	if (!len) /* skip slashes */
		1394	{
		1395	++rel;
		1396	continue;
		1397	}
		1398
		1399	if (beg [0] == '.')
		1400	{
		1401	if (len == 1)
		1402	continue; /* . - nop */
		1403
		1404	if (beg [1] == '.' && len == 2)
		1405	{
		1406	/* .. - back up one component, if possible */
		1407
		1408	while (res != req->ptr2)
		1409	if (*--res == '/')
		1410	break;
		1411
		1412	continue;
		1413	}
		1414	}
		1415
		1416	errno = ENAMETOOLONG;
		1417	if (res + 1 + len + 1 >= tmp1)
		1418	return;
		1419
		1420	/* copy one component */
		1421	*res = '/';
		1422	memcpy (res + 1, beg, len);
		1423
		1424	/* zero-terminate, for readlink */
		1425	res [len + 1] = 0;
		1426
		1427	/* now check if it's a symlink */
		1428	linklen = readlink (req->ptr2, tmp1, PATH_MAX);
		1429
		1430	if (linklen < 0)
		1431	{
		1432	if (errno != EINVAL)
		1433	return;
		1434
		1435	/* it's a normal directory. hopefully */
		1436	res += len + 1;
		1437	}
		1438	else
		1439	{
		1440	/* yay, it was a symlink - build new path in tmp2 */
		1441	int rellen = strlen (rel);
		1442
		1443	errno = ENAMETOOLONG;
		1444	if (linklen + 1 + rellen >= PATH_MAX)
		1445	return;
		1446
		1447	errno = ELOOP;
		1448	if (!--symlinks)
		1449	return;
		1450
		1451	if (*tmp1 == '/')
		1452	res = req->ptr2; /* symlink resolves to an absolute path */
		1453
		1454	/* we need to be careful, as rel might point into tmp2 already */
		1455	memmove (tmp2 + linklen + 1, rel, rellen + 1);
		1456	tmp2 [linklen] = '/';
		1457	memcpy (tmp2, tmp1, linklen);
		1458
		1459	rel = tmp2;
		1460	}
		1461	}
		1462
		1463	/* special case for the lone root path */
		1464	if (res == req->ptr2)
		1465	*res++ = '/';
		1466
		1467	req->result = res - (char *)req->ptr2;
		1468
		1469	done:
		1470	req->ptr2 = realloc (req->ptr2, req->result); /* trade time for space savings */
		1471	}
		1472
		1473	static signed char
		1474	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
		1475	{
		1476	return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */
		1477	: a->inode < b->inode ? -1
		1478	: a->inode > b->inode ? 1
		1479	: 0;
		1480	}
		1481
		1482	#define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0
		1483
		1484	#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */
		1485	#define EIO_SORT_FAST 60 /* when to only use insertion sort */
		1486
		1487	static void
		1488	eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits)
		1489	{
		1490	unsigned char bits [9 + sizeof (ino_t) * 8];
		1491	unsigned char *bit = bits;
		1492
		1493	assert (CHAR_BIT == 8);
		1494	assert (sizeof (eio_dirent) * 8 < 256);
		1495	assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */
		1496	assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */
		1497
		1498	if (size <= EIO_SORT_FAST)
		1499	return;
		1500
		1501	/* first prepare an array of bits to test in our radix sort */
		1502	/* try to take endianness into account, as well as differences in ino_t sizes */
		1503	/* inode_bits must contain all inodes ORed together */
		1504	/* which is used to skip bits that are 0 everywhere, which is very common */
		1505	{
		1506	ino_t endianness;
		1507	int i, j;
		1508
		1509	/* we store the byte offset of byte n into byte n of "endianness" */
		1510	for (i = 0; i < sizeof (ino_t); ++i)
		1511	((unsigned char *)&endianness)[i] = i;
		1512
		1513	*bit++ = 0;
		1514
		1515	for (i = 0; i < sizeof (ino_t); ++i)
		1516	{
		1517	/* shifting off the byte offsets out of "endianness" */
		1518	int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8;
		1519	endianness >>= 8;
		1520
		1521	for (j = 0; j < 8; ++j)
		1522	if (inode_bits & (((ino_t)1) << (i * 8 + j)))
		1523	*bit++ = offs + j;
		1524	}
		1525
		1526	for (j = 0; j < 8; ++j)
		1527	if (score_bits & (1 << j))
		1528	*bit++ = offsetof (eio_dirent, score) * 8 + j;
		1529	}
		1530
		1531	/* now actually do the sorting (a variant of MSD radix sort) */
		1532	{
		1533	eio_dirent *base_stk [9 + sizeof (ino_t) * 8], *base;
		1534	eio_dirent *end_stk [9 + sizeof (ino_t) * 8], *end;
		1535	unsigned char *bit_stk [9 + sizeof (ino_t) * 8];
		1536	int stk_idx = 0;
		1537
		1538	base_stk [stk_idx] = dents;
		1539	end_stk [stk_idx] = dents + size;
		1540	bit_stk [stk_idx] = bit - 1;
		1541
		1542	do
		1543	{
		1544	base = base_stk [stk_idx];
		1545	end = end_stk [stk_idx];
		1546	bit = bit_stk [stk_idx];
		1547
		1548	for (;;)
		1549	{
		1550	unsigned char O = *bit >> 3;
		1551	unsigned char M = 1 << (*bit & 7);
		1552
		1553	eio_dirent *a = base;
		1554	eio_dirent *b = end;
		1555
		1556	if (b - a < EIO_SORT_CUTOFF)
		1557	break;
		1558
		1559	/* now bit-partition the array on the bit */
		1560	/* this ugly asymmetric loop seems to perform much better than typical */
		1561	/* partition algos found in the literature */
		1562	do
		1563	if (!(((unsigned char *)a)[O] & M))
		1564	++a;
		1565	else if (!(((unsigned char *)--b)[O] & M))
		1566	{
		1567	eio_dirent tmp = *a; *a = *b; *b = tmp;
		1568	++a;
		1569	}
		1570	while (b > a);
		1571
		1572	/* next bit, or stop, if no bits left in this path */
		1573	if (!*--bit)
		1574	break;
		1575
		1576	base_stk [stk_idx] = a;
		1577	end_stk [stk_idx] = end;
		1578	bit_stk [stk_idx] = bit;
		1579	++stk_idx;
		1580
		1581	end = a;
		1582	}
		1583	}
		1584	while (stk_idx--);
		1585	}
		1586	}
		1587
		1588	static void
		1589	eio_dent_insertion_sort (eio_dirent *dents, int size)
		1590	{
		1591	/* first move the smallest element to the front, to act as a sentinel */
		1592	{
		1593	int i;
		1594	eio_dirent *min = dents;
		1595
		1596	/* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */
		1597	for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; )
		1598	if (EIO_DENT_CMP (dents [i], <, *min))
		1599	min = &dents [i];
		1600
		1601	/* swap elements 0 and j (minimum) */
		1602	{
		1603	eio_dirent tmp = *dents; *dents = *min; *min = tmp;
		1604	}
		1605	}
		1606
		1607	/* then do standard insertion sort, assuming that all elements are >= dents [0] */
		1608	{
		1609	eio_dirent *i, *j;
		1610
		1611	for (i = dents + 1; i < dents + size; ++i)
		1612	{
		1613	eio_dirent value = *i;
		1614
		1615	for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j)
		1616	j [1] = j [0];
		1617
		1618	j [1] = value;
		1619	}
		1620	}
		1621	}
		1622
		1623	static void
		1624	eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits)
		1625	{
		1626	if (size <= 1)
		1627	return; /* our insertion sort relies on size > 0 */
		1628
		1629	/* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */
		1630	/* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */
		1631	eio_dent_radix_sort (dents, size, score_bits, inode_bits);
		1632
		1633	/* use an insertion sort at the end, or for small arrays, */
		1634	/* as insertion sort is more efficient for small partitions */
		1635	eio_dent_insertion_sort (dents, size);
		1636	}
		1637
710	/* read a full directory */	1638	/* read a full directory */
		1639	static void
711	static void scandir_ (eio_req *req, worker *self)	1640	eio__scandir (eio_req *req, etp_worker *self)
712	{	1641	{
713	DIR *dirp;	1642	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;	1643	EIO_STRUCT_DIRENT *entp;
720	char *name, *names;	1644	char *name, *names;
721	int memlen = 4096;	1645	int namesalloc = 4096;
722	int memofs = 0;	1646	int namesoffs = 0;
		1647	int flags = req->int1;
		1648	eio_dirent *dents = 0;
		1649	int dentalloc = 128;
723	int res = 0;	1650	int dentoffs = 0;
		1651	ino_t inode_bits = 0;
		1652
		1653	req->result = -1;
		1654
		1655	if (!(flags & EIO_READDIR_DENTS))
		1656	flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
724		1657
725	X_LOCK (wrklock);	1658	X_LOCK (wrklock);
		1659	/* the corresponding closedir is in ETP_WORKER_CLEAR */
726	self->dirp = dirp = opendir (req->ptr1);	1660	self->dirp = dirp = opendir (req->ptr1);
727	self->dbuf = u = malloc (sizeof (*u));	1661
728	req->flags |= EIO_FLAG_PTR2_FREE;	1662	if (req->flags & EIO_FLAG_PTR1_FREE)
		1663	free (req->ptr1);
		1664
		1665	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
		1666	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
729	req->ptr2 = names = malloc (memlen);	1667	req->ptr2 = names = malloc (namesalloc);
730	X_UNLOCK (wrklock);	1668	X_UNLOCK (wrklock);
731		1669
732	if (dirp && u && names)	1670	if (dirp && names && (!flags || dents))
733	for (;;)	1671	for (;;)
734	{	1672	{
735	errno = 0;	1673	errno = 0;
736	readdir_r (dirp, &u->d, &entp);	1674	entp = readdir (dirp);
737		1675
738	if (!entp)	1676	if (!entp)
		1677	{
		1678	if (errno)
		1679	break;
		1680
		1681	/* sort etc. */
		1682	req->int1 = flags;
		1683	req->result = dentoffs;
		1684
		1685	if (flags & EIO_READDIR_STAT_ORDER)
		1686	eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits);
		1687	else if (flags & EIO_READDIR_DIRS_FIRST)
		1688	if (flags & EIO_READDIR_FOUND_UNKNOWN)
		1689	eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */
		1690	else
		1691	{
		1692	/* in this case, all is known, and we just put dirs first and sort them */
		1693	eio_dirent *oth = dents + dentoffs;
		1694	eio_dirent *dir = dents;
		1695
		1696	/* now partition dirs to the front, and non-dirs to the back */
		1697	/* by walking from both sides and swapping if necessary */
		1698	while (oth > dir)
		1699	{
		1700	if (dir->type == EIO_DT_DIR)
		1701	++dir;
		1702	else if ((--oth)->type == EIO_DT_DIR)
		1703	{
		1704	eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
		1705
		1706	++dir;
		1707	}
		1708	}
		1709
		1710	/* now sort the dirs only (dirs all have the same score) */
		1711	eio_dent_sort (dents, dir - dents, 0, inode_bits);
		1712	}
		1713
739	break;	1714	break;
		1715	}
740		1716
		1717	/* now add the entry to our list(s) */
741	name = entp->d_name;	1718	name = entp->d_name;
742		1719
		1720	/* skip . and .. entries */
743	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	1721	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
744	{	1722	{
745	int len = strlen (name) + 1;	1723	int len = D_NAMLEN (entp) + 1;
746		1724
747	res++;	1725	while (ecb_expect_false (namesoffs + len > namesalloc))
748
749	while (memofs + len > memlen)
750	{	1726	{
751	memlen *= 2;	1727	namesalloc *= 2;
752	X_LOCK (wrklock);	1728	X_LOCK (wrklock);
753	req->ptr2 = names = realloc (names, memlen);	1729	req->ptr2 = names = realloc (names, namesalloc);
754	X_UNLOCK (wrklock);	1730	X_UNLOCK (wrklock);
755		1731
756	if (!names)	1732	if (!names)
757	break;	1733	break;
758	}	1734	}
759		1735
760	memcpy (names + memofs, name, len);	1736	memcpy (names + namesoffs, name, len);
		1737
		1738	if (dents)
		1739	{
		1740	struct eio_dirent *ent;
		1741
		1742	if (ecb_expect_false (dentoffs == dentalloc))
		1743	{
		1744	dentalloc *= 2;
		1745	X_LOCK (wrklock);
		1746	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
		1747	X_UNLOCK (wrklock);
		1748
		1749	if (!dents)
		1750	break;
		1751	}
		1752
		1753	ent = dents + dentoffs;
		1754
		1755	ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
		1756	ent->namelen = len - 1;
		1757	ent->inode = D_INO (entp);
		1758
		1759	inode_bits |= ent->inode;
		1760
		1761	switch (D_TYPE (entp))
		1762	{
		1763	default:
		1764	ent->type = EIO_DT_UNKNOWN;
		1765	flags |= EIO_READDIR_FOUND_UNKNOWN;
		1766	break;
		1767
		1768	#ifdef DT_FIFO
		1769	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
		1770	#endif
		1771	#ifdef DT_CHR
		1772	case DT_CHR: ent->type = EIO_DT_CHR; break;
		1773	#endif
		1774	#ifdef DT_MPC
		1775	case DT_MPC: ent->type = EIO_DT_MPC; break;
		1776	#endif
		1777	#ifdef DT_DIR
		1778	case DT_DIR: ent->type = EIO_DT_DIR; break;
		1779	#endif
		1780	#ifdef DT_NAM
		1781	case DT_NAM: ent->type = EIO_DT_NAM; break;
		1782	#endif
		1783	#ifdef DT_BLK
		1784	case DT_BLK: ent->type = EIO_DT_BLK; break;
		1785	#endif
		1786	#ifdef DT_MPB
		1787	case DT_MPB: ent->type = EIO_DT_MPB; break;
		1788	#endif
		1789	#ifdef DT_REG
		1790	case DT_REG: ent->type = EIO_DT_REG; break;
		1791	#endif
		1792	#ifdef DT_NWK
		1793	case DT_NWK: ent->type = EIO_DT_NWK; break;
		1794	#endif
		1795	#ifdef DT_CMP
		1796	case DT_CMP: ent->type = EIO_DT_CMP; break;
		1797	#endif
		1798	#ifdef DT_LNK
		1799	case DT_LNK: ent->type = EIO_DT_LNK; break;
		1800	#endif
		1801	#ifdef DT_SOCK
		1802	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
		1803	#endif
		1804	#ifdef DT_DOOR
		1805	case DT_DOOR: ent->type = EIO_DT_DOOR; break;
		1806	#endif
		1807	#ifdef DT_WHT
		1808	case DT_WHT: ent->type = EIO_DT_WHT; break;
		1809	#endif
		1810	}
		1811
		1812	ent->score = 7;
		1813
		1814	if (flags & EIO_READDIR_DIRS_FIRST)
		1815	{
		1816	if (ent->type == EIO_DT_UNKNOWN)
		1817	{
		1818	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
		1819	ent->score = 1;
		1820	else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */
		1821	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
		1822	}
		1823	else if (ent->type == EIO_DT_DIR)
		1824	ent->score = 0;
		1825	}
		1826	}
		1827
761	memofs += len;	1828	namesoffs += len;
		1829	++dentoffs;
		1830	}
		1831
		1832	if (EIO_CANCELLED (req))
		1833	{
		1834	errno = ECANCELED;
		1835	break;
762	}	1836	}
763	}	1837	}
764
765	if (errno)
766	res = -1;
767
768	req->result = res;
769	}	1838	}
770		1839
771	/*****************************************************************************/	1840	/*****************************************************************************/
772		1841
		1842	#define ALLOC(len) \
		1843	if (!req->ptr2) \
		1844	{ \
		1845	X_LOCK (wrklock); \
		1846	req->flags |= EIO_FLAG_PTR2_FREE; \
		1847	X_UNLOCK (wrklock); \
		1848	req->ptr2 = malloc (len); \
		1849	if (!req->ptr2) \
		1850	{ \
		1851	errno = ENOMEM; \
		1852	req->result = -1; \
		1853	break; \
		1854	} \
		1855	}
		1856
773	X_THREAD_PROC (eio_proc)	1857	X_THREAD_PROC (etp_proc)
774	{	1858	{
775	eio_req *req;	1859	ETP_REQ *req;
776	struct timespec ts;	1860	struct timespec ts;
777	worker *self = (worker *)thr_arg;	1861	etp_worker *self = (etp_worker *)thr_arg;
		1862	int timeout;
778		1863
779	/* try to distribute timeouts somewhat randomly */	1864	/* try to distribute timeouts somewhat evenly */
780	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1865	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
781		1866
782	for (;;)	1867	for (;;)
783	{	1868	{
784	ts.tv_sec = time (0) + IDLE_TIMEOUT;	1869	ts.tv_sec = 0;
785		1870
786	X_LOCK (reqlock);	1871	X_LOCK (reqlock);
787		1872
788	for (;;)	1873	for (;;)
789	{	1874	{
790	self->req = req = reqq_shift (&req_queue);	1875	self->req = req = reqq_shift (&req_queue);
791		1876
792	if (req)	1877	if (req)
793	break;	1878	break;
794		1879
		1880	if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */
		1881	{
		1882	X_UNLOCK (reqlock);
		1883	X_LOCK (wrklock);
		1884	--started;
		1885	X_UNLOCK (wrklock);
		1886	goto quit;
		1887	}
		1888
795	++idle;	1889	++idle;
796		1890
797	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1891	if (idle <= max_idle)
		1892	/* we are allowed to idle, so do so without any timeout */
		1893	X_COND_WAIT (reqwait, reqlock);
		1894	else
798	{	1895	{
799	if (idle > max_idle)	1896	/* initialise timeout once */
800	{	1897	if (!ts.tv_sec)
801	--idle;	1898	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		1899
809	/* we are allowed to idle, so do so without any timeout */
810	X_COND_WAIT (reqwait, reqlock);	1900	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
811	ts.tv_sec = time (0) + IDLE_TIMEOUT;	1901	ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */
812	}	1902	}
813		1903
814	--idle;	1904	--idle;
815	}	1905	}
816		1906
817	--nready;	1907	--nready;
818		1908
819	X_UNLOCK (reqlock);	1909	X_UNLOCK (reqlock);
820		1910
821	errno = 0; /* strictly unnecessary */
822
823	if (!EIO_CANCELLED (req))
824	switch (req->type)	1911	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;	1912	goto quit;
910		1913
911	default:	1914	ETP_EXECUTE (self, req);
912	req->result = -1;
913	break;
914	}
915
916	req->errorno = errno;
917		1915
918	X_LOCK (reslock);	1916	X_LOCK (reslock);
919		1917
920	++npending;	1918	++npending;
921		1919
922	if (!reqq_push (&res_queue, req) && want_poll_cb)	1920	if (!reqq_push (&res_queue, req) && want_poll_cb)
923	want_poll_cb ();	1921	want_poll_cb ();
924		1922
925	self->req = 0;	1923	self->req = 0;
926	worker_clear (self);	1924	etp_worker_clear (self);
927		1925
928	X_UNLOCK (reslock);	1926	X_UNLOCK (reslock);
929	}	1927	}
930		1928
931	quit:	1929	quit:
932	X_LOCK (wrklock);	1930	X_LOCK (wrklock);
933	worker_free (self);	1931	etp_worker_free (self);
934	X_UNLOCK (wrklock);	1932	X_UNLOCK (wrklock);
935		1933
936	return 0;	1934	return 0;
937	}	1935	}
938		1936
939	/*****************************************************************************/	1937	/*****************************************************************************/
940		1938
941	static void eio_atfork_prepare (void)	1939	int ecb_cold
		1940	eio_init (void (*want_poll)(void), void (*done_poll)(void))
942	{	1941	{
943	X_LOCK (wrklock);	1942	return etp_init (want_poll, done_poll);
944	X_LOCK (reqlock);
945	X_LOCK (reslock);
946	#if !HAVE_PREADWRITE
947	X_LOCK (preadwritelock);
948	#endif
949	#if !HAVE_READDIR_R
950	X_LOCK (readdirlock);
951	#endif
952	}	1943	}
953		1944
954	static void eio_atfork_parent (void)	1945	ecb_inline void
		1946	eio_api_destroy (eio_req *req)
955	{	1947	{
956	#if !HAVE_READDIR_R	1948	free (req);
957	X_UNLOCK (readdirlock);
958	#endif
959	#if !HAVE_PREADWRITE
960	X_UNLOCK (preadwritelock);
961	#endif
962	X_UNLOCK (reslock);
963	X_UNLOCK (reqlock);
964	X_UNLOCK (wrklock);
965	}	1949	}
966		1950
967	static void eio_atfork_child (void)	1951	#define REQ(rtype) \
968	{	1952	eio_req *req; \
969	eio_req *prv;	1953	\
		1954	req = (eio_req *)calloc (1, sizeof *req); \
		1955	if (!req) \
		1956	return 0; \
		1957	\
		1958	req->type = rtype; \
		1959	req->pri = pri; \
		1960	req->finish = cb; \
		1961	req->data = data; \
		1962	req->destroy = eio_api_destroy;
970		1963
971	while (prv = reqq_shift (&req_queue))	1964	#define SEND eio_submit (req); return req
972	eio_destroy (prv);
973		1965
974	while (prv = reqq_shift (&res_queue))	1966	#define PATH \
975	eio_destroy (prv);	1967	req->flags |= EIO_FLAG_PTR1_FREE; \
		1968	req->ptr1 = strdup (path); \
		1969	if (!req->ptr1) \
		1970	{ \
		1971	eio_api_destroy (req); \
		1972	return 0; \
		1973	}
976		1974
977	while (wrk_first.next != &wrk_first)	1975	static void
		1976	eio_execute (etp_worker *self, eio_req *req)
		1977	{
		1978	if (ecb_expect_false (EIO_CANCELLED (req)))
978	{	1979	{
979	worker *wrk = wrk_first.next;	1980	req->result = -1;
		1981	req->errorno = ECANCELED;
		1982	return;
		1983	}
980		1984
981	if (wrk->req)	1985	switch (req->type)
982	eio_destroy (wrk->req);
983
984	worker_clear (wrk);
985	worker_free (wrk);
986	}	1986	{
		1987	case EIO_READ: ALLOC (req->size);
		1988	req->result = req->offs >= 0
		1989	? pread (req->int1, req->ptr2, req->size, req->offs)
		1990	: read (req->int1, req->ptr2, req->size); break;
		1991	case EIO_WRITE: req->result = req->offs >= 0
		1992	? pwrite (req->int1, req->ptr2, req->size, req->offs)
		1993	: write (req->int1, req->ptr2, req->size); break;
987		1994
988	started = 0;	1995	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
989	idle = 0;	1996	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break;
990	nreqs = 0;
991	nready = 0;
992	npending = 0;
993		1997
994	eio_atfork_parent ();	1998	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
995	}	1999	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		2000	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		2001	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		2002	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		2003	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
996		2004
997	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	2005	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
998	{	2006	req->result = statvfs (req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
999	want_poll_cb = want_poll;	2007	case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
1000	done_poll_cb = done_poll;	2008	req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
1001		2009
		2010	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		2011	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		2012	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
		2013	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
		2014	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		2015	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
		2016
		2017	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
		2018	case EIO_CLOSE: req->result = close (req->int1); break;
		2019	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
		2020	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
		2021	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
		2022	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
		2023	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
		2024	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
		2025	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
		2026	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
		2027
		2028	case EIO_REALPATH: eio__realpath (req, self); break;
		2029
		2030	case EIO_READLINK: ALLOC (PATH_MAX);
		2031	req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break;
		2032
		2033	case EIO_SYNC: req->result = 0; sync (); break;
		2034	case EIO_FSYNC: req->result = fsync (req->int1); break;
		2035	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		2036	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
		2037	case EIO_MTOUCH: req->result = eio__mtouch (req); break;
		2038	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
		2039	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
		2040	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
		2041	case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;
		2042
		2043	case EIO_READDIR: eio__scandir (req, self); break;
		2044
		2045	case EIO_BUSY:
1002	#ifdef _WIN32	2046	#ifdef _WIN32
1003	X_MUTEX_CHECK (wrklock);	2047	Sleep (req->nv1 * 1e3);
1004	X_MUTEX_CHECK (reslock);	2048	#else
1005	X_MUTEX_CHECK (reqlock);	2049	{
1006	X_MUTEX_CHECK (reqwait);	2050	struct timeval tv;
1007	X_MUTEX_CHECK (preadwritelock);
1008	X_MUTEX_CHECK (readdirlock);
1009		2051
1010	X_COND_CHECK (reqwait);	2052	tv.tv_sec = req->nv1;
1011	#endif	2053	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6;
1012		2054
1013	X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);	2055	req->result = select (0, 0, 0, 0, &tv);
1014	}	2056	}
		2057	#endif
		2058	break;
1015		2059
1016	#if 0	2060	case EIO_UTIME:
		2061	case EIO_FUTIME:
		2062	{
		2063	struct timeval tv[2];
		2064	struct timeval *times;
1017		2065
		2066	if (req->nv1 != -1. || req->nv2 != -1.)
		2067	{
		2068	tv[0].tv_sec = req->nv1;
		2069	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		2070	tv[1].tv_sec = req->nv2;
		2071	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		2072
		2073	times = tv;
		2074	}
		2075	else
		2076	times = 0;
		2077
		2078	req->result = req->type == EIO_FUTIME
		2079	? futimes (req->int1, times)
		2080	: utimes (req->ptr1, times);
		2081	}
		2082	break;
		2083
		2084	case EIO_GROUP:
		2085	abort (); /* handled in eio_request */
		2086
		2087	case EIO_NOP:
		2088	req->result = 0;
		2089	break;
		2090
		2091	case EIO_CUSTOM:
		2092	req->feed (req);
		2093	break;
		2094
		2095	default:
		2096	errno = ENOSYS;
		2097	req->result = -1;
		2098	break;
		2099	}
		2100
		2101	req->errorno = errno;
		2102	}
		2103
		2104	#ifndef EIO_NO_WRAPPERS
		2105
		2106	eio_req *eio_nop (int pri, eio_cb cb, void *data)
		2107	{
		2108	REQ (EIO_NOP); SEND;
		2109	}
		2110
		2111	eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
		2112	{
		2113	REQ (EIO_BUSY); req->nv1 = delay; SEND;
		2114	}
		2115
1018	eio_req *eio_fsync (int fd, eio_cb cb);	2116	eio_req *eio_sync (int pri, eio_cb cb, void *data)
		2117	{
		2118	REQ (EIO_SYNC); SEND;
		2119	}
		2120
		2121	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
		2122	{
		2123	REQ (EIO_FSYNC); req->int1 = fd; SEND;
		2124	}
		2125
		2126	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		2127	{
		2128	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		2129	}
		2130
		2131	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		2132	{
		2133	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		2134	}
		2135
		2136	eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data)
		2137	{
		2138	REQ (EIO_MLOCK); req->ptr2 = addr; req->size = length; SEND;
		2139	}
		2140
		2141	eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)
		2142	{
		2143	REQ (EIO_MLOCKALL); req->int1 = flags; SEND;
		2144	}
		2145
		2146	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
		2147	{
		2148	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
		2149	}
		2150
		2151	eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)
		2152	{
		2153	REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;
		2154	}
		2155
1019	eio_req *eio_fdatasync (int fd, eio_cb cb);	2156	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1020	eio_req *eio_dupclose (int fd, eio_cb cb);	2157	{
		2158	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
		2159	}
		2160
		2161	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
		2162	{
		2163	REQ (EIO_CLOSE); req->int1 = fd; SEND;
		2164	}
		2165
1021	eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb);	2166	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);	2167	{
1023	eio_req *eio_write (int fd, off_t offs, size_t length, char *data, eio_cb cb);	2168	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 */	2169	}
		2170
		2171	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		2172	{
		2173	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		2174	}
		2175
		2176	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		2177	{
		2178	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		2179	}
		2180
		2181	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
		2182	{
		2183	REQ (EIO_FSTAT); req->int1 = fd; SEND;
		2184	}
		2185
		2186	eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data)
		2187	{
		2188	REQ (EIO_FSTATVFS); req->int1 = fd; SEND;
		2189	}
		2190
1025	eio_req *eio_futime (int fd, double atime, double mtime, eio_cb cb);	2191	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
		2192	{
		2193	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
		2194	}
		2195
1026	eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb);	2196	eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
		2197	{
		2198	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
		2199	}
		2200
1027	eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb);	2201	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
		2202	{
		2203	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
		2204	}
		2205
1028	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb);	2206	eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
		2207	{
		2208	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
		2209	}
		2210
1029	eio_req *eio_dup2 (int fd, int fd2, eio_cb cb);	2211	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
		2212	{
		2213	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
		2214	}
		2215
1030	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb);	2216	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data)
		2217	{
		2218	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
		2219	}
		2220
1031	eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb);	2221	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 */	2222	{
1033	eio_req *eio_stat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */	2223	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 */	2224	}
		2225
1035	eio_req *eio_utime (const char *path, double atime, double mtime, eio_cb cb);	2226	eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
		2227	{
		2228	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
		2229	}
		2230
1036	eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb);	2231	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
		2232	{
		2233	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
		2234	}
		2235
		2236	eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
		2237	{
		2238	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
		2239	}
		2240
1037	eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb);	2241	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
		2242	{
		2243	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
		2244	}
		2245
1038	eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb);	2246	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);	2247	{
		2248	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
		2249	}
		2250
		2251	static eio_req *
		2252	eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
		2253	{
		2254	REQ (type); PATH; SEND;
		2255	}
		2256
		2257	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
		2258	{
		2259	return eio__1path (EIO_READLINK, path, pri, cb, data);
		2260	}
		2261
		2262	eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data)
		2263	{
		2264	return eio__1path (EIO_REALPATH, path, pri, cb, data);
		2265	}
		2266
		2267	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
		2268	{
		2269	return eio__1path (EIO_STAT, path, pri, cb, data);
		2270	}
		2271
		2272	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
		2273	{
		2274	return eio__1path (EIO_LSTAT, path, pri, cb, data);
		2275	}
		2276
		2277	eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data)
		2278	{
		2279	return eio__1path (EIO_STATVFS, path, pri, cb, data);
		2280	}
		2281
1040	eio_req *eio_unlink (const char *path, eio_cb cb);	2282	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
		2283	{
		2284	return eio__1path (EIO_UNLINK, path, pri, cb, data);
		2285	}
		2286
1041	eio_req *eio_rmdir (const char *path, eio_cb cb);	2287	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 */	2288	{
		2289	return eio__1path (EIO_RMDIR, path, pri, cb, data);
		2290	}
		2291
		2292	eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data)
		2293	{
		2294	REQ (EIO_READDIR); PATH; req->int1 = flags; SEND;
		2295	}
		2296
1043	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb);	2297	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 */	2298	{
1045	eio_req *eio_nop (eio_cb cb); /* does nothing except go through the whole process */	2299	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND;
		2300	}
		2301
		2302	static eio_req *
		2303	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2304	{
		2305	REQ (type); PATH;
		2306
		2307	req->flags |= EIO_FLAG_PTR2_FREE;
		2308	req->ptr2 = strdup (new_path);
		2309	if (!req->ptr2)
		2310	{
		2311	eio_api_destroy (req);
		2312	return 0;
		2313	}
		2314
		2315	SEND;
		2316	}
		2317
		2318	eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2319	{
		2320	return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
		2321	}
		2322
		2323	eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2324	{
		2325	return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
		2326	}
		2327
		2328	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2329	{
		2330	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
		2331	}
		2332
		2333	eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data)
		2334	{
		2335	REQ (EIO_CUSTOM); req->feed = execute; SEND;
		2336	}
		2337
		2338	#endif
		2339
		2340	eio_req *eio_grp (eio_cb cb, void *data)
		2341	{
		2342	const int pri = EIO_PRI_MAX;
		2343
		2344	REQ (EIO_GROUP); SEND;
		2345	}
		2346
		2347	#undef REQ
		2348	#undef PATH
		2349	#undef SEND
		2350
		2351	/*****************************************************************************/
		2352	/* grp functions */
		2353
1046	void	2354	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)	2355	eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1420	{	2356	{
1421	grp->int2 = limit;	2357	grp->int2 = limit;
1422	grp->feed = feed;	2358	grp->feed = feed;
1423		2359
1424	grp_try_feed (grp);	2360	grp_try_feed (grp);
1425	}	2361	}
1426		2362
		2363	void
1427	void eio_grp_limit (eio_req *grp, int limit)	2364	eio_grp_limit (eio_req *grp, int limit)
1428	{	2365	{
1429	grp->int2 = limit;	2366	grp->int2 = limit;
1430		2367
1431	grp_try_feed (grp);	2368	grp_try_feed (grp);
1432	}	2369	}
1433		2370
		2371	void
1434	void eio_grp_add (eio_req *grp, eio_req *req)	2372	eio_grp_add (eio_req *grp, eio_req *req)
1435	{	2373	{
1436	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	2374	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
		2375
		2376	grp->flags |= EIO_FLAG_GROUPADD;
1437		2377
1438	++grp->size;	2378	++grp->size;
1439	req->grp = grp;	2379	req->grp = grp;
1440		2380
1441	req->grp_prev = 0;	2381	req->grp_prev = 0;
…		…
1445	grp->grp_first->grp_prev = req;	2385	grp->grp_first->grp_prev = req;
1446		2386
1447	grp->grp_first = req;	2387	grp->grp_first = req;
1448	}	2388	}
1449		2389
		2390	/*****************************************************************************/
		2391	/* misc garbage */
1450		2392
		2393	eio_ssize_t
		2394	eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
		2395	{
		2396	etp_worker wrk;
		2397	eio_ssize_t ret;
		2398
		2399	wrk.dbuf = 0;
		2400
		2401	ret = eio__sendfile (ofd, ifd, offset, count, &wrk);
		2402
		2403	if (wrk.dbuf)
		2404	free (wrk.dbuf);
		2405
		2406	return ret;
		2407	}
		2408

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