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Comparing libeio/eio.c (file contents):
Revision 1.6 by root, Sun May 11 19:11:05 2008 UTC vs.
Revision 1.33 by root, Sat Jun 6 19:44:17 2009 UTC

		1	/*
		2	* libeio implementation
		3	*
		4	* Copyright (c) 2007,2008,2009 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
1	#include "eio.h"	40	#include "eio.h"
		41
		42	#ifdef EIO_STACKSIZE
		43	# define XTHREAD_STACKSIZE EIO_STACKSIZE
		44	#endif
2	#include "xthread.h"	45	#include "xthread.h"
3		46
4	#include <errno.h>	47	#include <errno.h>
5	#include <stddef.h>	48	#include <stddef.h>
6	#include <stdlib.h>	49	#include <stdlib.h>
…		…
8	#include <errno.h>	51	#include <errno.h>
9	#include <sys/types.h>	52	#include <sys/types.h>
10	#include <sys/stat.h>	53	#include <sys/stat.h>
11	#include <limits.h>	54	#include <limits.h>
12	#include <fcntl.h>	55	#include <fcntl.h>
13	#include <sched.h>	56	#include <assert.h>
14		57
15	#ifndef EIO_FINISH	58	#ifndef EIO_FINISH
16	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0	59	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
17	#endif	60	#endif
18		61
…		…
25	#endif	68	#endif
26		69
27	#ifdef _WIN32	70	#ifdef _WIN32
28		71
29	/*doh*/	72	/*doh*/
30
31	#else	73	#else
32		74
33	# include "config.h"	75	# include "config.h"
34	# include <sys/time.h>	76	# include <sys/time.h>
35	# include <sys/select.h>	77	# include <sys/select.h>
36	# include <unistd.h>	78	# include <unistd.h>
37	# include <utime.h>	79	# include <utime.h>
38	# include <signal.h>	80	# include <signal.h>
39	# include <dirent.h>	81	# include <dirent.h>
40		82
		83	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
		84	# if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
		85	# define _DIRENT_HAVE_D_TYPE /* sigh */
		86	# define D_INO(de) (de)->d_fileno
		87	# define D_NAMLEN(de) (de)->d_namlen
		88	# elif defined(__linux) || defined(d_ino) || _XOPEN_SOURCE >= 600
		89	# define D_INO(de) (de)->d_ino
		90	# endif
		91
		92	#ifdef _D_EXACT_NAMLEN
		93	# undef D_NAMLEN
		94	# define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
		95	#endif
		96
		97	# ifdef _DIRENT_HAVE_D_TYPE
		98	# define D_TYPE(de) (de)->d_type
		99	# endif
		100
41	# ifndef EIO_STRUCT_DIRENT	101	# ifndef EIO_STRUCT_DIRENT
42	# define EIO_STRUCT_DIRENT struct dirent	102	# define EIO_STRUCT_DIRENT struct dirent
43	# endif	103	# endif
44		104
45	#endif	105	#endif
46
47	# ifndef EIO_STRUCT_STAT
48	# define EIO_STRUCT_STAT struct stat
49	# endif
50		106
51	#if HAVE_SENDFILE	107	#if HAVE_SENDFILE
52	# if __linux	108	# if __linux
53	# include <sys/sendfile.h>	109	# include <sys/sendfile.h>
54	# elif __freebsd	110	# elif __freebsd
…		…
61	# else	117	# else
62	# error sendfile support requested but not available	118	# error sendfile support requested but not available
63	# endif	119	# endif
64	#endif	120	#endif
65		121
		122	#ifndef D_TYPE
		123	# define D_TYPE(de) 0
		124	#endif
		125	#ifndef D_INO
		126	# define D_INO(de) 0
		127	#endif
		128	#ifndef D_NAMLEN
		129	# define D_NAMLEN(de) strlen ((de)->d_name)
		130	#endif
		131
66	/* number of seconds after which an idle threads exit */	132	/* number of seconds after which an idle threads exit */
67	#define IDLE_TIMEOUT 10	133	#define IDLE_TIMEOUT 10
68		134
69	/* used for struct dirent, AIX doesn't provide it */	135	/* used for struct dirent, AIX doesn't provide it */
70	#ifndef NAME_MAX	136	#ifndef NAME_MAX
…		…
74	/* buffer size for various temporary buffers */	140	/* buffer size for various temporary buffers */
75	#define EIO_BUFSIZE 65536	141	#define EIO_BUFSIZE 65536
76		142
77	#define dBUF \	143	#define dBUF \
78	char *eio_buf; \	144	char *eio_buf; \
79	X_LOCK (wrklock); \	145	ETP_WORKER_LOCK (self); \
80	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	146	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \
81	X_UNLOCK (wrklock); \	147	ETP_WORKER_UNLOCK (self); \
		148	errno = ENOMEM; \
82	if (!eio_buf) \	149	if (!eio_buf) \
83	return -1;	150	return -1;
84		151
85	#define EIO_TICKS ((1000000 + 1023) >> 10)	152	#define EIO_TICKS ((1000000 + 1023) >> 10)
86		153
		154	/*****************************************************************************/
		155
		156	#if __GNUC__ >= 3
		157	# define expect(expr,value) __builtin_expect ((expr),(value))
		158	#else
		159	# define expect(expr,value) (expr)
		160	#endif
		161
		162	#define expect_false(expr) expect ((expr) != 0, 0)
		163	#define expect_true(expr) expect ((expr) != 0, 1)
		164
		165	/*****************************************************************************/
		166
		167	#define ETP_PRI_MIN EIO_PRI_MIN
		168	#define ETP_PRI_MAX EIO_PRI_MAX
		169
		170	struct etp_worker;
		171
		172	#define ETP_REQ eio_req
		173	#define ETP_DESTROY(req) eio_destroy (req)
		174	static int eio_finish (eio_req *req);
		175	#define ETP_FINISH(req) eio_finish (req)
		176	static void eio_execute (struct etp_worker *self, eio_req *req);
		177	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)
		178
		179	#define ETP_WORKER_CLEAR(req) \
		180	if (wrk->dbuf) \
		181	{ \
		182	free (wrk->dbuf); \
		183	wrk->dbuf = 0; \
		184	} \
		185	\
		186	if (wrk->dirp) \
		187	{ \
		188	closedir (wrk->dirp); \
		189	wrk->dirp = 0; \
		190	}
		191
		192	#define ETP_WORKER_COMMON \
		193	void *dbuf; \
		194	DIR *dirp;
		195
		196	/*****************************************************************************/
		197
		198	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
		199
		200	/* calculcate time difference in ~1/EIO_TICKS of a second */
		201	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		202	{
		203	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
		204	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		205	}
		206
		207	static unsigned int started, idle, wanted = 4;
		208
87	static void (*want_poll_cb) (void);	209	static void (*want_poll_cb) (void);
88	static void (*done_poll_cb) (void);	210	static void (*done_poll_cb) (void);
89		211
90	static unsigned int max_poll_time = 0;	212	static unsigned int max_poll_time; /* reslock */
91	static unsigned int max_poll_reqs = 0;	213	static unsigned int max_poll_reqs; /* reslock */
92		214
93	/* calculcate time difference in ~1/EIO_TICKS of a second */	215	static volatile unsigned int nreqs; /* reqlock */
94	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	216	static volatile unsigned int nready; /* reqlock */
95	{	217	static volatile unsigned int npending; /* reqlock */
96	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	218	static volatile unsigned int max_idle = 4;
97	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
98	}
99		219
100	static unsigned int started, idle, wanted;
101
102	/* worker threads management */
103	static mutex_t wrklock = X_MUTEX_INIT;	220	static mutex_t wrklock = X_MUTEX_INIT;
104
105	typedef struct worker {
106	/* locked by wrklock */
107	struct worker *prev, *next;
108
109	thread_t tid;
110
111	/* locked by reslock, reqlock or wrklock */
112	eio_req *req; /* currently processed request */
113	void *dbuf;
114	DIR *dirp;
115	} worker;
116
117	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
118
119	static void worker_clear (worker *wrk)
120	{
121	if (wrk->dirp)
122	{
123	closedir (wrk->dirp);
124	wrk->dirp = 0;
125	}
126
127	if (wrk->dbuf)
128	{
129	free (wrk->dbuf);
130	wrk->dbuf = 0;
131	}
132	}
133
134	static void worker_free (worker *wrk)
135	{
136	wrk->next->prev = wrk->prev;
137	wrk->prev->next = wrk->next;
138
139	free (wrk);
140	}
141
142	static volatile unsigned int nreqs, nready, npending;
143	static volatile unsigned int max_idle = 4;
144
145	static mutex_t reslock = X_MUTEX_INIT;	221	static mutex_t reslock = X_MUTEX_INIT;
146	static mutex_t reqlock = X_MUTEX_INIT;	222	static mutex_t reqlock = X_MUTEX_INIT;
147	static cond_t reqwait = X_COND_INIT;	223	static cond_t reqwait = X_COND_INIT;
148		224
		225	#if !HAVE_PREADWRITE
		226	/*
		227	* make our pread/pwrite emulation safe against themselves, but not against
		228	* normal read/write by using a mutex. slows down execution a lot,
		229	* but that's your problem, not mine.
		230	*/
		231	static mutex_t preadwritelock = X_MUTEX_INIT;
		232	#endif
		233
		234	typedef struct etp_worker
		235	{
		236	/* locked by wrklock */
		237	struct etp_worker *prev, *next;
		238
		239	thread_t tid;
		240
		241	/* locked by reslock, reqlock or wrklock */
		242	ETP_REQ *req; /* currently processed request */
		243
		244	ETP_WORKER_COMMON
		245	} etp_worker;
		246
		247	static etp_worker wrk_first = { &wrk_first, &wrk_first, 0 }; /* NOT etp */
		248
		249	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
		250	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
		251
		252	/* worker threads management */
		253
		254	static void etp_worker_clear (etp_worker *wrk)
		255	{
		256	ETP_WORKER_CLEAR (wrk);
		257	}
		258
		259	static void etp_worker_free (etp_worker *wrk)
		260	{
		261	wrk->next->prev = wrk->prev;
		262	wrk->prev->next = wrk->next;
		263
		264	free (wrk);
		265	}
		266
149	unsigned int eio_nreqs (void)	267	static unsigned int etp_nreqs (void)
150	{	268	{
		269	int retval;
		270	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		271	retval = nreqs;
		272	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
151	return nreqs;	273	return retval;
152	}	274	}
153		275
154	unsigned int eio_nready (void)	276	static unsigned int etp_nready (void)
155	{	277	{
156	unsigned int retval;	278	unsigned int retval;
157		279
158	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	280	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
159	retval = nready;	281	retval = nready;
160	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	282	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
161		283
162	return retval;	284	return retval;
163	}	285	}
164		286
165	unsigned int eio_npending (void)	287	static unsigned int etp_npending (void)
166	{	288	{
167	unsigned int retval;	289	unsigned int retval;
168		290
169	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	291	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
170	retval = npending;	292	retval = npending;
171	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	293	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
172		294
173	return retval;	295	return retval;
174	}	296	}
175		297
176	unsigned int eio_nthreads (void)	298	static unsigned int etp_nthreads (void)
177	{	299	{
178	unsigned int retval;	300	unsigned int retval;
179		301
180	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	302	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
181	retval = started;	303	retval = started;
…		…
188	* a somewhat faster data structure might be nice, but	310	* a somewhat faster data structure might be nice, but
189	* with 8 priorities this actually needs <20 insns	311	* with 8 priorities this actually needs <20 insns
190	* per shift, the most expensive operation.	312	* per shift, the most expensive operation.
191	*/	313	*/
192	typedef struct {	314	typedef struct {
193	eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */	315	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
194	int size;	316	int size;
195	} reqq;	317	} etp_reqq;
196		318
197	static reqq req_queue;	319	static etp_reqq req_queue;
198	static reqq res_queue;	320	static etp_reqq res_queue;
199		321
200	static int reqq_push (reqq *q, eio_req *req)	322	static int reqq_push (etp_reqq *q, ETP_REQ *req)
201	{	323	{
202	int pri = req->pri;	324	int pri = req->pri;
203	req->next = 0;	325	req->next = 0;
204		326
205	if (q->qe[pri])	327	if (q->qe[pri])
…		…
211	q->qe[pri] = q->qs[pri] = req;	333	q->qe[pri] = q->qs[pri] = req;
212		334
213	return q->size++;	335	return q->size++;
214	}	336	}
215		337
216	static eio_req *reqq_shift (reqq *q)	338	static ETP_REQ *reqq_shift (etp_reqq *q)
217	{	339	{
218	int pri;	340	int pri;
219		341
220	if (!q->size)	342	if (!q->size)
221	return 0;	343	return 0;
222		344
223	--q->size;	345	--q->size;
224		346
225	for (pri = EIO_NUM_PRI; pri--; )	347	for (pri = ETP_NUM_PRI; pri--; )
226	{	348	{
227	eio_req *req = q->qs[pri];	349	eio_req *req = q->qs[pri];
228		350
229	if (req)	351	if (req)
230	{	352	{
…		…
236	}	358	}
237		359
238	abort ();	360	abort ();
239	}	361	}
240		362
241	static void grp_try_feed (eio_req *grp)	363	static void etp_atfork_prepare (void)
242	{	364	{
243	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	365	X_LOCK (wrklock);
		366	X_LOCK (reqlock);
		367	X_LOCK (reslock);
		368	#if !HAVE_PREADWRITE
		369	X_LOCK (preadwritelock);
		370	#endif
		371	}
		372
		373	static void etp_atfork_parent (void)
		374	{
		375	#if !HAVE_PREADWRITE
		376	X_UNLOCK (preadwritelock);
		377	#endif
		378	X_UNLOCK (reslock);
		379	X_UNLOCK (reqlock);
		380	X_UNLOCK (wrklock);
		381	}
		382
		383	static void etp_atfork_child (void)
		384	{
		385	ETP_REQ *prv;
		386
		387	while ((prv = reqq_shift (&req_queue)))
		388	ETP_DESTROY (prv);
		389
		390	while ((prv = reqq_shift (&res_queue)))
		391	ETP_DESTROY (prv);
		392
		393	while (wrk_first.next != &wrk_first)
244	{	394	{
245	int old_len = grp->size;	395	etp_worker *wrk = wrk_first.next;
246		396
247	EIO_FEED (grp);	397	if (wrk->req)
		398	ETP_DESTROY (wrk->req);
248		399
249	/* stop if no progress has been made */	400	etp_worker_clear (wrk);
250	if (old_len == grp->size)	401	etp_worker_free (wrk);
251	{
252	grp->feed = 0;
253	break;
254	}
255	}	402	}
256	}
257		403
258	static int eio_finish (eio_req *req);	404	started = 0;
		405	idle = 0;
		406	nreqs = 0;
		407	nready = 0;
		408	npending = 0;
259		409
260	static int grp_dec (eio_req *grp)	410	etp_atfork_parent ();
261	{	411	}
262	--grp->size;
263		412
264	/* call feeder, if applicable */	413	static void
265	grp_try_feed (grp);	414	etp_once_init (void)
		415	{
		416	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
		417	}
266		418
267	/* finish, if done */	419	static int
268	if (!grp->size && grp->int1)	420	etp_init (void (*want_poll)(void), void (*done_poll)(void))
269	return eio_finish (grp);	421	{
270	else	422	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
		423
		424	pthread_once (&doinit, etp_once_init);
		425
		426	want_poll_cb = want_poll;
		427	done_poll_cb = done_poll;
		428
271	return 0;	429	return 0;
272	}	430	}
273		431
274	void eio_destroy (eio_req *req)
275	{
276	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
277	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
278
279	EIO_DESTROY (req);
280	}
281
282	static int eio_finish (eio_req *req)
283	{
284	int res = EIO_FINISH (req);
285
286	if (req->grp)
287	{
288	int res2;
289	eio_req *grp = req->grp;
290
291	/* unlink request */
292	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
293	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
294
295	if (grp->grp_first == req)
296	grp->grp_first = req->grp_next;
297
298	res2 = grp_dec (grp);
299
300	if (!res && res2)
301	res = res2;
302	}
303
304	eio_destroy (req);
305
306	return res;
307	}
308
309	void eio_grp_cancel (eio_req *grp)
310	{
311	for (grp = grp->grp_first; grp; grp = grp->grp_next)
312	eio_cancel (grp);
313	}
314
315	void eio_cancel (eio_req *req)
316	{
317	X_LOCK (wrklock);
318	req->flags |= EIO_FLAG_CANCELLED;
319	X_UNLOCK (wrklock);
320
321	eio_grp_cancel (req);
322	}
323
324	X_THREAD_PROC (eio_proc);	432	X_THREAD_PROC (etp_proc);
325		433
326	static void start_thread (void)	434	static void etp_start_thread (void)
327	{	435	{
328	worker *wrk = calloc (1, sizeof (worker));	436	etp_worker *wrk = calloc (1, sizeof (etp_worker));
329		437
330	if (!wrk)	438	/*TODO*/
331	croak ("unable to allocate worker thread data");	439	assert (("unable to allocate worker thread data", wrk));
332		440
333	X_LOCK (wrklock);	441	X_LOCK (wrklock);
334		442
335	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))	443	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
336	{	444	{
337	wrk->prev = &wrk_first;	445	wrk->prev = &wrk_first;
338	wrk->next = wrk_first.next;	446	wrk->next = wrk_first.next;
339	wrk_first.next->prev = wrk;	447	wrk_first.next->prev = wrk;
340	wrk_first.next = wrk;	448	wrk_first.next = wrk;
…		…
344	free (wrk);	452	free (wrk);
345		453
346	X_UNLOCK (wrklock);	454	X_UNLOCK (wrklock);
347	}	455	}
348		456
349	static void maybe_start_thread (void)	457	static void etp_maybe_start_thread (void)
350	{	458	{
351	if (eio_nthreads () >= wanted)	459	if (expect_true (etp_nthreads () >= wanted))
352	return;	460	return;
353		461
354	/* todo: maybe use idle here, but might be less exact */	462	/* todo: maybe use idle here, but might be less exact */
355	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())	463	if (expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
356	return;	464	return;
357		465
358	start_thread ();	466	etp_start_thread ();
359	}	467	}
360		468
361	void eio_submit (eio_req *req)
362	{
363	++nreqs;
364
365	X_LOCK (reqlock);
366	++nready;
367	reqq_push (&req_queue, req);
368	X_COND_SIGNAL (reqwait);
369	X_UNLOCK (reqlock);
370
371	maybe_start_thread ();
372	}
373
374	static void end_thread (void)	469	static void etp_end_thread (void)
375	{	470	{
376	eio_req *req = calloc (1, sizeof (eio_req));	471	eio_req *req = calloc (1, sizeof (eio_req));
377		472
378	req->type = EIO_QUIT;	473	req->type = -1;
379	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	474	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
380		475
381	X_LOCK (reqlock);	476	X_LOCK (reqlock);
382	reqq_push (&req_queue, req);	477	reqq_push (&req_queue, req);
383	X_COND_SIGNAL (reqwait);	478	X_COND_SIGNAL (reqwait);
384	X_UNLOCK (reqlock);	479	X_UNLOCK (reqlock);
…		…
386	X_LOCK (wrklock);	481	X_LOCK (wrklock);
387	--started;	482	--started;
388	X_UNLOCK (wrklock);	483	X_UNLOCK (wrklock);
389	}	484	}
390		485
391	void eio_set_max_poll_time (double nseconds)
392	{
393	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
394	max_poll_time = nseconds;
395	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
396	}
397
398	void eio_set_max_poll_reqs (unsigned int maxreqs)
399	{
400	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
401	max_poll_reqs = maxreqs;
402	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
403	}
404
405	void eio_set_max_idle (unsigned int nthreads)
406	{
407	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
408	max_idle = nthreads <= 0 ? 1 : nthreads;
409	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
410	}
411
412	void eio_set_min_parallel (unsigned int nthreads)
413	{
414	if (wanted < nthreads)
415	wanted = nthreads;
416	}
417
418	void eio_set_max_parallel (unsigned int nthreads)
419	{
420	if (wanted > nthreads)
421	wanted = nthreads;
422
423	while (started > wanted)
424	end_thread ();
425	}
426
427	int eio_poll (void)	486	static int etp_poll (void)
428	{	487	{
429	int maxreqs = max_poll_reqs;	488	unsigned int maxreqs;
		489	unsigned int maxtime;
430	struct timeval tv_start, tv_now;	490	struct timeval tv_start, tv_now;
431	eio_req *req;
432		491
		492	X_LOCK (reslock);
		493	maxreqs = max_poll_reqs;
		494	maxtime = max_poll_time;
		495	X_UNLOCK (reslock);
		496
433	if (max_poll_time)	497	if (maxtime)
434	gettimeofday (&tv_start, 0);	498	gettimeofday (&tv_start, 0);
435		499
436	for (;;)	500	for (;;)
437	{	501	{
		502	ETP_REQ *req;
		503
438	maybe_start_thread ();	504	etp_maybe_start_thread ();
439		505
440	X_LOCK (reslock);	506	X_LOCK (reslock);
441	req = reqq_shift (&res_queue);	507	req = reqq_shift (&res_queue);
442		508
443	if (req)	509	if (req)
…		…
451	X_UNLOCK (reslock);	517	X_UNLOCK (reslock);
452		518
453	if (!req)	519	if (!req)
454	return 0;	520	return 0;
455		521
		522	X_LOCK (reqlock);
456	--nreqs;	523	--nreqs;
		524	X_UNLOCK (reqlock);
457		525
458	if (req->type == EIO_GROUP && req->size)	526	if (expect_false (req->type == EIO_GROUP && req->size))
459	{	527	{
460	req->int1 = 1; /* mark request as delayed */	528	req->int1 = 1; /* mark request as delayed */
461	continue;	529	continue;
462	}	530	}
463	else	531	else
464	{	532	{
465	int res = eio_finish (req);	533	int res = ETP_FINISH (req);
466	if (res)	534	if (expect_false (res))
467	return res;	535	return res;
468	}	536	}
469		537
470	if (maxreqs && !--maxreqs)	538	if (expect_false (maxreqs && !--maxreqs))
471	break;	539	break;
472		540
473	if (max_poll_time)	541	if (maxtime)
474	{	542	{
475	gettimeofday (&tv_now, 0);	543	gettimeofday (&tv_now, 0);
476		544
477	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)	545	if (tvdiff (&tv_start, &tv_now) >= maxtime)
478	break;	546	break;
479	}	547	}
480	}	548	}
481		549
482	errno = EAGAIN;	550	errno = EAGAIN;
483	return -1;	551	return -1;
484	}	552	}
485		553
		554	static void etp_cancel (ETP_REQ *req)
		555	{
		556	X_LOCK (wrklock);
		557	req->flags |= EIO_FLAG_CANCELLED;
		558	X_UNLOCK (wrklock);
		559
		560	eio_grp_cancel (req);
		561	}
		562
		563	static void etp_submit (ETP_REQ *req)
		564	{
		565	req->pri -= ETP_PRI_MIN;
		566
		567	if (expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
		568	if (expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
		569
		570	if (expect_false (req->type == EIO_GROUP))
		571	{
		572	/* I hope this is worth it :/ */
		573	X_LOCK (reqlock);
		574	++nreqs;
		575	X_UNLOCK (reqlock);
		576
		577	X_LOCK (reslock);
		578
		579	++npending;
		580
		581	if (!reqq_push (&res_queue, req) && want_poll_cb)
		582	want_poll_cb ();
		583
		584	X_UNLOCK (reslock);
		585	}
		586	else
		587	{
		588	X_LOCK (reqlock);
		589	++nreqs;
		590	++nready;
		591	reqq_push (&req_queue, req);
		592	X_COND_SIGNAL (reqwait);
		593	X_UNLOCK (reqlock);
		594
		595	etp_maybe_start_thread ();
		596	}
		597	}
		598
		599	static void etp_set_max_poll_time (double nseconds)
		600	{
		601	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		602	max_poll_time = nseconds;
		603	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		604	}
		605
		606	static void etp_set_max_poll_reqs (unsigned int maxreqs)
		607	{
		608	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		609	max_poll_reqs = maxreqs;
		610	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		611	}
		612
		613	static void etp_set_max_idle (unsigned int nthreads)
		614	{
		615	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		616	max_idle = nthreads <= 0 ? 1 : nthreads;
		617	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		618	}
		619
		620	static void etp_set_min_parallel (unsigned int nthreads)
		621	{
		622	if (wanted < nthreads)
		623	wanted = nthreads;
		624	}
		625
		626	static void etp_set_max_parallel (unsigned int nthreads)
		627	{
		628	if (wanted > nthreads)
		629	wanted = nthreads;
		630
		631	while (started > wanted)
		632	etp_end_thread ();
		633	}
		634
		635	/*****************************************************************************/
		636
		637	static void grp_try_feed (eio_req *grp)
		638	{
		639	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
		640	{
		641	grp->flags &= ~EIO_FLAG_GROUPADD;
		642
		643	EIO_FEED (grp);
		644
		645	/* stop if no progress has been made */
		646	if (!(grp->flags & EIO_FLAG_GROUPADD))
		647	{
		648	grp->feed = 0;
		649	break;
		650	}
		651	}
		652	}
		653
		654	static int grp_dec (eio_req *grp)
		655	{
		656	--grp->size;
		657
		658	/* call feeder, if applicable */
		659	grp_try_feed (grp);
		660
		661	/* finish, if done */
		662	if (!grp->size && grp->int1)
		663	return eio_finish (grp);
		664	else
		665	return 0;
		666	}
		667
		668	void eio_destroy (eio_req *req)
		669	{
		670	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
		671	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
		672
		673	EIO_DESTROY (req);
		674	}
		675
		676	static int eio_finish (eio_req *req)
		677	{
		678	int res = EIO_FINISH (req);
		679
		680	if (req->grp)
		681	{
		682	int res2;
		683	eio_req *grp = req->grp;
		684
		685	/* unlink request */
		686	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		687	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		688
		689	if (grp->grp_first == req)
		690	grp->grp_first = req->grp_next;
		691
		692	res2 = grp_dec (grp);
		693
		694	if (!res && res2)
		695	res = res2;
		696	}
		697
		698	eio_destroy (req);
		699
		700	return res;
		701	}
		702
		703	void eio_grp_cancel (eio_req *grp)
		704	{
		705	for (grp = grp->grp_first; grp; grp = grp->grp_next)
		706	eio_cancel (grp);
		707	}
		708
		709	void eio_cancel (eio_req *req)
		710	{
		711	etp_cancel (req);
		712	}
		713
		714	void eio_submit (eio_req *req)
		715	{
		716	etp_submit (req);
		717	}
		718
		719	unsigned int eio_nreqs (void)
		720	{
		721	return etp_nreqs ();
		722	}
		723
		724	unsigned int eio_nready (void)
		725	{
		726	return etp_nready ();
		727	}
		728
		729	unsigned int eio_npending (void)
		730	{
		731	return etp_npending ();
		732	}
		733
		734	unsigned int eio_nthreads (void)
		735	{
		736	return etp_nthreads ();
		737	}
		738
		739	void eio_set_max_poll_time (double nseconds)
		740	{
		741	etp_set_max_poll_time (nseconds);
		742	}
		743
		744	void eio_set_max_poll_reqs (unsigned int maxreqs)
		745	{
		746	etp_set_max_poll_reqs (maxreqs);
		747	}
		748
		749	void eio_set_max_idle (unsigned int nthreads)
		750	{
		751	etp_set_max_idle (nthreads);
		752	}
		753
		754	void eio_set_min_parallel (unsigned int nthreads)
		755	{
		756	etp_set_min_parallel (nthreads);
		757	}
		758
		759	void eio_set_max_parallel (unsigned int nthreads)
		760	{
		761	etp_set_max_parallel (nthreads);
		762	}
		763
		764	int eio_poll (void)
		765	{
		766	return etp_poll ();
		767	}
		768
486	/*****************************************************************************/	769	/*****************************************************************************/
487	/* work around various missing functions */	770	/* work around various missing functions */
488		771
489	#if !HAVE_PREADWRITE	772	#if !HAVE_PREADWRITE
		773	# undef pread
		774	# undef pwrite
490	# define pread aio_pread	775	# define pread eio__pread
491	# define pwrite aio_pwrite	776	# define pwrite eio__pwrite
492		777
493	/*	778	static ssize_t
494	* make our pread/pwrite safe against themselves, but not against	779	eio__pread (int fd, void *buf, size_t count, off_t offset)
495	* normal read/write by using a mutex. slows down execution a lot,
496	* but that's your problem, not mine.
497	*/
498	static mutex_t preadwritelock = X_MUTEX_INIT;
499
500	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
501	{	780	{
502	ssize_t res;	781	ssize_t res;
503	off_t ooffset;	782	off_t ooffset;
504		783
505	X_LOCK (preadwritelock);	784	X_LOCK (preadwritelock);
…		…
510	X_UNLOCK (preadwritelock);	789	X_UNLOCK (preadwritelock);
511		790
512	return res;	791	return res;
513	}	792	}
514		793
515	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	794	static ssize_t
		795	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
516	{	796	{
517	ssize_t res;	797	ssize_t res;
518	off_t ooffset;	798	off_t ooffset;
519		799
520	X_LOCK (preadwritelock);	800	X_LOCK (preadwritelock);
521	ooffset = lseek (fd, 0, SEEK_CUR);	801	ooffset = lseek (fd, 0, SEEK_CUR);
522	lseek (fd, offset, SEEK_SET);	802	lseek (fd, offset, SEEK_SET);
523	res = write (fd, buf, count);	803	res = write (fd, buf, count);
524	lseek (fd, offset, SEEK_SET);	804	lseek (fd, ooffset, SEEK_SET);
525	X_UNLOCK (preadwritelock);	805	X_UNLOCK (preadwritelock);
526		806
527	return res;	807	return res;
528	}	808	}
529	#endif	809	#endif
530		810
531	#ifndef HAVE_FUTIMES	811	#ifndef HAVE_FUTIMES
532		812
		813	# undef utimes
		814	# undef futimes
533	# define utimes(path,times) aio_utimes (path, times)	815	# define utimes(path,times) eio__utimes (path, times)
534	# define futimes(fd,times) aio_futimes (fd, times)	816	# define futimes(fd,times) eio__futimes (fd, times)
535		817
		818	static int
536	static int aio_utimes (const char *filename, const struct timeval times[2])	819	eio__utimes (const char *filename, const struct timeval times[2])
537	{	820	{
538	if (times)	821	if (times)
539	{	822	{
540	struct utimbuf buf;	823	struct utimbuf buf;
541		824
…		…
546	}	829	}
547	else	830	else
548	return utime (filename, 0);	831	return utime (filename, 0);
549	}	832	}
550		833
551	static int aio_futimes (int fd, const struct timeval tv[2])	834	static int eio__futimes (int fd, const struct timeval tv[2])
552	{	835	{
553	errno = ENOSYS;	836	errno = ENOSYS;
554	return -1;	837	return -1;
555	}	838	}
556		839
557	#endif	840	#endif
558		841
559	#if !HAVE_FDATASYNC	842	#if !HAVE_FDATASYNC
		843	# undef fdatasync
560	# define fdatasync fsync	844	# define fdatasync(fd) fsync (fd)
561	#endif	845	#endif
		846
		847	/* sync_file_range always needs emulation */
		848	int
		849	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
		850	{
		851	#if HAVE_SYNC_FILE_RANGE
		852	int res;
		853
		854	if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE
		855	|| EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE
		856	|| EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER)
		857	{
		858	flags = 0
		859	| (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0)
		860	| (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0)
		861	| (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0);
		862	}
		863
		864	res = sync_file_range (fd, offset, nbytes, flags);
		865
		866	if (!res || errno != ENOSYS)
		867	return res;
		868	#endif
		869
		870	/* even though we could play tricks with the flags, it's better to always
		871	* call fdatasync, as thta matches the expectation of it's users best */
		872	return fdatasync (fd);
		873	}
562		874
563	#if !HAVE_READAHEAD	875	#if !HAVE_READAHEAD
		876	# undef readahead
564	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	877	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
565		878
		879	static ssize_t
566	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)	880	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
567	{	881	{
568	size_t todo = count;	882	size_t todo = count;
569	dBUF;	883	dBUF;
570		884
571	while (todo > 0)	885	while (todo > 0)
…		…
581	return count;	895	return count;
582	}	896	}
583		897
584	#endif	898	#endif
585		899
586	#if !HAVE_READDIR_R
587	# define readdir_r aio_readdir_r
588
589	static mutex_t readdirlock = X_MUTEX_INIT;
590
591	static int readdir_r (DIR *dirp, EIO_STRUCT_DIRENT *ent, EIO_STRUCT_DIRENT **res)
592	{
593	EIO_STRUCT_DIRENT *e;
594	int errorno;
595
596	X_LOCK (readdirlock);
597
598	e = readdir (dirp);
599	errorno = errno;
600
601	if (e)
602	{
603	*res = ent;
604	strcpy (ent->d_name, e->d_name);
605	}
606	else
607	*res = 0;
608
609	X_UNLOCK (readdirlock);
610
611	errno = errorno;
612	return e ? 0 : -1;
613	}
614	#endif
615
616	/* sendfile always needs emulation */	900	/* sendfile always needs emulation */
		901	static ssize_t
617	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)	902	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)
618	{	903	{
619	ssize_t res;	904	ssize_t res;
620		905
621	if (!count)	906	if (!count)
622	return 0;	907	return 0;
…		…
704	}	989	}
705		990
706	return res;	991	return res;
707	}	992	}
708		993
		994	static int
		995	eio_dent_cmp (const void *a_, const void *b_)
		996	{
		997	const eio_dirent *a = (const eio_dirent *)a_;
		998	const eio_dirent *b = (const eio_dirent *)b_;
		999
		1000	return (int)b->score - (int)a->score ? (int)b->score - (int)a->score
		1001	: a->inode < b->inode ? -1 : a->inode > b->inode ? 1 : 0; /* int might be < ino_t */
		1002	}
		1003
709	/* read a full directory */	1004	/* read a full directory */
		1005	static void
710	static void scandir_ (eio_req *req, worker *self)	1006	eio__scandir (eio_req *req, etp_worker *self)
711	{	1007	{
712	DIR *dirp;	1008	DIR *dirp;
713	union
714	{
715	EIO_STRUCT_DIRENT d;
716	char b [offsetof (EIO_STRUCT_DIRENT, d_name) + NAME_MAX + 1];
717	} *u;
718	EIO_STRUCT_DIRENT *entp;	1009	EIO_STRUCT_DIRENT *entp;
719	char *name, *names;	1010	unsigned char *name, *names;
720	int memlen = 4096;	1011	int namesalloc = 4096;
721	int memofs = 0;	1012	int namesoffs = 0;
		1013	int flags = req->int1;
		1014	eio_dirent *dents = 0;
		1015	int dentalloc = 128;
722	int res = 0;	1016	int dentoffs = 0;
		1017
		1018	req->result = -1;
		1019
		1020	if (!(flags & EIO_READDIR_DENTS))
		1021	flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
723		1022
724	X_LOCK (wrklock);	1023	X_LOCK (wrklock);
		1024	/* the corresponding closedir is in ETP_WORKER_CLEAR */
725	self->dirp = dirp = opendir (req->ptr1);	1025	self->dirp = dirp = opendir (req->ptr1);
726	self->dbuf = u = malloc (sizeof (*u));
727	req->flags |= EIO_FLAG_PTR2_FREE;	1026	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
728	req->ptr2 = names = malloc (memlen);	1027	req->ptr1 = names = malloc (namesalloc);
		1028	req->ptr2 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
729	X_UNLOCK (wrklock);	1029	X_UNLOCK (wrklock);
730		1030
731	if (dirp && u && names)	1031	if (dirp && names && (!flags || dents))
732	for (;;)	1032	for (;;)
733	{	1033	{
734	errno = 0;	1034	errno = 0;
735	readdir_r (dirp, &u->d, &entp);	1035	entp = readdir (dirp);
736		1036
737	if (!entp)	1037	if (!entp)
		1038	{
		1039	if (errno)
		1040	break;
		1041
		1042	/* sort etc. */
		1043	req->int1 = flags;
		1044	req->result = dentoffs;
		1045
		1046	if (dents)
		1047	{
		1048	eio_dirent *ent = dents + dentoffs;
		1049
		1050	while (ent > dents)
		1051	(--ent)->name = names + (size_t)ent->name;
		1052	}
		1053
		1054	if (flags & EIO_READDIR_STAT_ORDER
		1055	|| !(~flags & (EIO_READDIR_DIRS_FIRST | EIO_READDIR_FOUND_UNKNOWN)))
		1056	{
		1057	/* pray your qsort doesn't use quicksort */
		1058	qsort (dents, dentoffs, sizeof (*dents), eio_dent_cmp); /* score depends of DIRS_FIRST */
		1059	}
		1060	else if (flags & EIO_READDIR_DIRS_FIRST)
		1061	{
		1062	/* in this case, all is known, and we just put dirs first and sort them */
		1063	eio_dirent *ent = dents + dentoffs;
		1064	eio_dirent *dir = dents;
		1065
		1066	while (ent > dir)
		1067	{
		1068	if (dir->type == DT_DIR)
		1069	++dir;
		1070	else
		1071	{
		1072	--ent;
		1073
		1074	if (ent->type == DT_DIR)
		1075	{
		1076	eio_dirent tmp = *dir;
		1077	*dir = *ent;
		1078	*ent = tmp;
		1079
		1080	++dir;
		1081	}
		1082	}
		1083	}
		1084
		1085	/* now sort the dirs only */
		1086	qsort (dents, dir - dents, sizeof (*dents), eio_dent_cmp);
		1087	}
		1088
		1089	/* only provide the names array unless DENTS is specified */
		1090	if (!(flags & EIO_READDIR_DENTS))
		1091	{
		1092	X_LOCK (wrklock);
		1093	assert (!dents);
		1094	req->ptr1 = 0;
		1095	req->ptr2 = names;
		1096	X_UNLOCK (wrklock);
		1097	}
		1098
738	break;	1099	break;
		1100	}
739		1101
		1102	/* now add the entry to our list(s) */
740	name = entp->d_name;	1103	name = entp->d_name;
741		1104
		1105	/* skip . and .. entries */
742	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	1106	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
743	{	1107	{
744	int len = strlen (name) + 1;	1108	int len = D_NAMLEN (entp) + 1;
745		1109
746	res++;	1110	while (expect_false (namesoffs + len > namesalloc))
747
748	while (memofs + len > memlen)
749	{	1111	{
750	memlen *= 2;	1112	namesalloc *= 2;
751	X_LOCK (wrklock);	1113	X_LOCK (wrklock);
752	req->ptr2 = names = realloc (names, memlen);	1114	req->ptr1 = names = realloc (names, namesalloc);
753	X_UNLOCK (wrklock);	1115	X_UNLOCK (wrklock);
754		1116
755	if (!names)	1117	if (!names)
756	break;	1118	break;
757	}	1119	}
758		1120
759	memcpy (names + memofs, name, len);	1121	memcpy (names + namesoffs, name, len);
		1122
		1123	if (dents)
		1124	{
		1125	struct eio_dirent *ent;
		1126
		1127	if (expect_false (dentoffs == dentalloc))
		1128	{
		1129	dentalloc *= 2;
		1130	X_LOCK (wrklock);
		1131	req->ptr2 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
		1132	X_UNLOCK (wrklock);
		1133
		1134	if (!dents)
		1135	break;
		1136	}
		1137
		1138	ent = dents + dentoffs;
		1139
		1140	ent->name = (char *)(size_t)namesoffs; /* rather dirtily we store the offset in the pointer */
		1141	ent->namelen = len - 1;
		1142	ent->inode = D_INO (entp);
		1143
		1144	switch (D_TYPE (entp))
		1145	{
		1146	default:
		1147	ent->type = EIO_DT_UNKNOWN;
		1148	flags |= EIO_READDIR_FOUND_UNKNOWN;
		1149	break;
		1150
		1151	#ifdef DT_FIFO
		1152	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
		1153	#endif
		1154	#ifdef DT_CHR
		1155	case DT_CHR: ent->type = EIO_DT_CHR; break;
		1156	#endif
		1157	#ifdef DT_MPC
		1158	case DT_MPC: ent->type = EIO_DT_MPC; break;
		1159	#endif
		1160	#ifdef DT_DIR
		1161	case DT_DIR: ent->type = EIO_DT_DIR; break;
		1162	#endif
		1163	#ifdef DT_NAM
		1164	case DT_NAM: ent->type = EIO_DT_NAM; break;
		1165	#endif
		1166	#ifdef DT_BLK
		1167	case DT_BLK: ent->type = EIO_DT_BLK; break;
		1168	#endif
		1169	#ifdef DT_MPB
		1170	case DT_MPB: ent->type = EIO_DT_MPB; break;
		1171	#endif
		1172	#ifdef DT_REG
		1173	case DT_REG: ent->type = EIO_DT_REG; break;
		1174	#endif
		1175	#ifdef DT_NWK
		1176	case DT_NWK: ent->type = EIO_DT_NWK; break;
		1177	#endif
		1178	#ifdef DT_CMP
		1179	case DT_CMP: ent->type = EIO_DT_CMP; break;
		1180	#endif
		1181	#ifdef DT_LNK
		1182	case DT_LNK: ent->type = EIO_DT_LNK; break;
		1183	#endif
		1184	#ifdef DT_SOCK
		1185	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
		1186	#endif
		1187	#ifdef DT_DOOR
		1188	case DT_DOOR: ent->type = EIO_DT_DOOR; break;
		1189	#endif
		1190	#ifdef DT_WHT
		1191	case DT_WHT: ent->type = EIO_DT_WHT; break;
		1192	#endif
		1193	}
		1194
		1195	ent->score = 0;
		1196
		1197	if (flags & EIO_READDIR_DIRS_FIRST)
		1198	{
		1199	if (ent->type == EIO_DT_UNKNOWN)
		1200	{
		1201	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
		1202	ent->score = 98;
		1203	else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */
		1204	ent->score = len <= 2 ? len + 60 : len <= 4 ? 50 : len <= 7 ? 40 : 10; /* shorter == more likely dir, but avoid too many classes */
		1205	}
		1206	else if (ent->type == EIO_DT_DIR)
		1207	ent->score = 100;
		1208	}
		1209	}
		1210
760	memofs += len;	1211	namesoffs += len;
		1212	++dentoffs;
761	}	1213	}
762	}	1214	}
763		1215	else
764	if (errno)
765	res = -1;
766
767	req->result = res;	1216	req->result = -1;
		1217	}
		1218
		1219	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
		1220	# undef msync
		1221	# define msync(a,b,c) ((errno = ENOSYS), -1)
		1222	#endif
		1223
		1224	int
		1225	eio__mtouch (void *mem, size_t len, int flags)
		1226	{
		1227	intptr_t addr = (intptr_t)mem;
		1228	intptr_t end = addr + len;
		1229	#ifdef PAGESIZE
		1230	const intptr_t page = PAGESIZE;
		1231	#else
		1232	static intptr_t page;
		1233
		1234	if (!page)
		1235	page = sysconf (_SC_PAGESIZE);
		1236	#endif
		1237
		1238	addr &= ~(page - 1); /* assume page size is always a power of two */
		1239
		1240	if (addr < end)
		1241	if (flags) /* modify */
		1242	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len);
		1243	else
		1244	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len);
		1245
		1246	return 0;
768	}	1247	}
769		1248
770	/*****************************************************************************/	1249	/*****************************************************************************/
771		1250
772	#define ALLOC(len) \	1251	#define ALLOC(len) \
773	X_LOCK (wrklock); \
774	req->flags |= EIO_FLAG_PTR2_FREE; \
775	X_UNLOCK (wrklock); \
776	req->ptr2 = malloc (len); \
777	if (!req->ptr2) \	1252	if (!req->ptr2) \
778	{ \	1253	{ \
		1254	X_LOCK (wrklock); \
		1255	req->flags |= EIO_FLAG_PTR2_FREE; \
		1256	X_UNLOCK (wrklock); \
		1257	req->ptr2 = malloc (len); \
		1258	if (!req->ptr2) \
		1259	{ \
779	errno = ENOMEM; \	1260	errno = ENOMEM; \
780	req->result = -1; \	1261	req->result = -1; \
781	break; \	1262	break; \
		1263	} \
782	}	1264	}
783		1265
784	X_THREAD_PROC (eio_proc)	1266	X_THREAD_PROC (etp_proc)
785	{	1267	{
786	eio_req *req;	1268	ETP_REQ *req;
787	struct timespec ts;	1269	struct timespec ts;
788	worker *self = (worker *)thr_arg;	1270	etp_worker *self = (etp_worker *)thr_arg;
789		1271
790	/* try to distribute timeouts somewhat randomly */	1272	/* try to distribute timeouts somewhat randomly */
791	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1273	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
792		1274
793	for (;;)	1275	for (;;)
794	{	1276	{
795	ts.tv_sec = time (0) + IDLE_TIMEOUT;
796
797	X_LOCK (reqlock);	1277	X_LOCK (reqlock);
798		1278
799	for (;;)	1279	for (;;)
800	{	1280	{
801	self->req = req = reqq_shift (&req_queue);	1281	self->req = req = reqq_shift (&req_queue);
…		…
803	if (req)	1283	if (req)
804	break;	1284	break;
805		1285
806	++idle;	1286	++idle;
807		1287
		1288	ts.tv_sec = time (0) + IDLE_TIMEOUT;
808	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1289	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
809	{	1290	{
810	if (idle > max_idle)	1291	if (idle > max_idle)
811	{	1292	{
812	--idle;	1293	--idle;
…		…
817	goto quit;	1298	goto quit;
818	}	1299	}
819		1300
820	/* we are allowed to idle, so do so without any timeout */	1301	/* we are allowed to idle, so do so without any timeout */
821	X_COND_WAIT (reqwait, reqlock);	1302	X_COND_WAIT (reqwait, reqlock);
822	ts.tv_sec = time (0) + IDLE_TIMEOUT;
823	}	1303	}
824		1304
825	--idle;	1305	--idle;
826	}	1306	}
827		1307
828	--nready;	1308	--nready;
829		1309
830	X_UNLOCK (reqlock);	1310	X_UNLOCK (reqlock);
831		1311
832	errno = 0; /* strictly unnecessary */	1312	if (req->type < 0)
		1313	goto quit;
833		1314
834	if (!EIO_CANCELLED (req))	1315	if (!EIO_CANCELLED (req))
835	switch (req->type)	1316	ETP_EXECUTE (self, req);
836	{
837	case EIO_READ: req->result = req->offs >= 0
838	? pread (req->int1, req->ptr2, req->size, req->offs)
839	: read (req->int1, req->ptr2, req->size); break;
840	case EIO_WRITE: req->result = req->offs >= 0
841	? pwrite (req->int1, req->ptr2, req->size, req->offs)
842	: write (req->int1, req->ptr2, req->size); break;
843
844	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
845	case EIO_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
846
847	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
848	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
849	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
850	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
851	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
852	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
853
854	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
855	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
856	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
857	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
858	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
859	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
860
861	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
862	case EIO_CLOSE: req->result = close (req->int1); break;
863	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
864	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
865	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
866	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
867	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
868	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
869	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
870	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
871	case EIO_READLINK: ALLOC (NAME_MAX);
872	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
873
874	case EIO_SYNC: req->result = 0; sync (); break;
875	case EIO_FSYNC: req->result = fsync (req->int1); break;
876	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
877
878	case EIO_READDIR: scandir_ (req, self); break;
879
880	case EIO_BUSY:
881	#ifdef _WIN32
882	Sleep (req->nv1 * 1000.);
883	#else
884	{
885	struct timeval tv;
886
887	tv.tv_sec = req->nv1;
888	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
889
890	req->result = select (0, 0, 0, 0, &tv);
891	}
892	#endif
893	break;
894
895	case EIO_UTIME:
896	case EIO_FUTIME:
897	{
898	struct timeval tv[2];
899	struct timeval *times;
900
901	if (req->nv1 != -1. || req->nv2 != -1.)
902	{
903	tv[0].tv_sec = req->nv1;
904	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
905	tv[1].tv_sec = req->nv2;
906	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
907
908	times = tv;
909	}
910	else
911	times = 0;
912
913
914	req->result = req->type == EIO_FUTIME
915	? futimes (req->int1, times)
916	: utimes (req->ptr1, times);
917	}
918
919	case EIO_GROUP:
920	case EIO_NOP:
921	break;
922
923	case EIO_QUIT:
924	goto quit;
925
926	default:
927	req->result = -1;
928	break;
929	}
930
931	req->errorno = errno;
932		1317
933	X_LOCK (reslock);	1318	X_LOCK (reslock);
934		1319
935	++npending;	1320	++npending;
936		1321
937	if (!reqq_push (&res_queue, req) && want_poll_cb)	1322	if (!reqq_push (&res_queue, req) && want_poll_cb)
938	want_poll_cb ();	1323	want_poll_cb ();
939		1324
940	self->req = 0;	1325	self->req = 0;
941	worker_clear (self);	1326	etp_worker_clear (self);
942		1327
943	X_UNLOCK (reslock);	1328	X_UNLOCK (reslock);
944	}	1329	}
945		1330
946	quit:	1331	quit:
947	X_LOCK (wrklock);	1332	X_LOCK (wrklock);
948	worker_free (self);	1333	etp_worker_free (self);
949	X_UNLOCK (wrklock);	1334	X_UNLOCK (wrklock);
950		1335
951	return 0;	1336	return 0;
952	}	1337	}
953		1338
954	/*****************************************************************************/	1339	/*****************************************************************************/
955		1340
956	static void eio_atfork_prepare (void)
957	{
958	X_LOCK (wrklock);
959	X_LOCK (reqlock);
960	X_LOCK (reslock);
961	#if !HAVE_PREADWRITE
962	X_LOCK (preadwritelock);
963	#endif
964	#if !HAVE_READDIR_R
965	X_LOCK (readdirlock);
966	#endif
967	}
968
969	static void eio_atfork_parent (void)
970	{
971	#if !HAVE_READDIR_R
972	X_UNLOCK (readdirlock);
973	#endif
974	#if !HAVE_PREADWRITE
975	X_UNLOCK (preadwritelock);
976	#endif
977	X_UNLOCK (reslock);
978	X_UNLOCK (reqlock);
979	X_UNLOCK (wrklock);
980	}
981
982	static void eio_atfork_child (void)
983	{
984	eio_req *prv;
985
986	while (prv = reqq_shift (&req_queue))
987	eio_destroy (prv);
988
989	while (prv = reqq_shift (&res_queue))
990	eio_destroy (prv);
991
992	while (wrk_first.next != &wrk_first)
993	{
994	worker *wrk = wrk_first.next;
995
996	if (wrk->req)
997	eio_destroy (wrk->req);
998
999	worker_clear (wrk);
1000	worker_free (wrk);
1001	}
1002
1003	started = 0;
1004	idle = 0;
1005	nreqs = 0;
1006	nready = 0;
1007	npending = 0;
1008
1009	eio_atfork_parent ();
1010	}
1011
1012	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	1341	int eio_init (void (*want_poll)(void), void (*done_poll)(void))
1013	{	1342	{
1014	want_poll_cb = want_poll;	1343	return etp_init (want_poll, done_poll);
1015	done_poll_cb = done_poll;
1016
1017	#ifdef _WIN32
1018	X_MUTEX_CHECK (wrklock);
1019	X_MUTEX_CHECK (reslock);
1020	X_MUTEX_CHECK (reqlock);
1021	X_MUTEX_CHECK (reqwait);
1022	X_MUTEX_CHECK (preadwritelock);
1023	X_MUTEX_CHECK (readdirlock);
1024
1025	X_COND_CHECK (reqwait);
1026	#endif
1027
1028	X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);
1029	}	1344	}
1030		1345
1031	static void eio_api_destroy (eio_req *req)	1346	static void eio_api_destroy (eio_req *req)
1032	{	1347	{
1033	free (req);	1348	free (req);
…		…
1038	\	1353	\
1039	req = (eio_req *)calloc (1, sizeof *req); \	1354	req = (eio_req *)calloc (1, sizeof *req); \
1040	if (!req) \	1355	if (!req) \
1041	return 0; \	1356	return 0; \
1042	\	1357	\
1043	req->type = EIO_ ## rtype; \	1358	req->type = rtype; \
1044	req->pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \	1359	req->pri = pri; \
1045	req->finish = cb; \	1360	req->finish = cb; \
		1361	req->data = data; \
1046	req->destroy = eio_api_destroy;	1362	req->destroy = eio_api_destroy;
1047		1363
1048	#define SEND eio_submit (req); return req	1364	#define SEND eio_submit (req); return req
1049		1365
1050	#define PATH (void)0	1366	#define PATH \
		1367	req->flags |= EIO_FLAG_PTR1_FREE; \
		1368	req->ptr1 = strdup (path); \
		1369	if (!req->ptr1) \
		1370	{ \
		1371	eio_api_destroy (req); \
		1372	return 0; \
		1373	}
1051		1374
		1375	static void eio_execute (etp_worker *self, eio_req *req)
		1376	{
		1377	errno = 0;
		1378
		1379	switch (req->type)
		1380	{
		1381	case EIO_READ: ALLOC (req->size);
		1382	req->result = req->offs >= 0
		1383	? pread (req->int1, req->ptr2, req->size, req->offs)
		1384	: read (req->int1, req->ptr2, req->size); break;
		1385	case EIO_WRITE: req->result = req->offs >= 0
		1386	? pwrite (req->int1, req->ptr2, req->size, req->offs)
		1387	: write (req->int1, req->ptr2, req->size); break;
		1388
		1389	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		1390	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break;
		1391
		1392	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1393	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1394	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1395	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1396	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1397	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1398
		1399	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		1400	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1401	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
		1402	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
		1403	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		1404	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
		1405
		1406	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
		1407	case EIO_CLOSE: req->result = close (req->int1); break;
		1408	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
		1409	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
		1410	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
		1411	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
		1412	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
		1413	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
		1414	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
		1415	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->int3); break;
		1416
		1417	case EIO_READLINK: ALLOC (NAME_MAX);
		1418	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
		1419
		1420	case EIO_SYNC: req->result = 0; sync (); break;
		1421	case EIO_FSYNC: req->result = fsync (req->int1); break;
		1422	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		1423	case EIO_MSYNC: req->result = msync (req->ptr2, req->size, req->int1); break;
		1424	case EIO_MTOUCH: req->result = eio__mtouch (req->ptr2, req->size, req->int1); break;
		1425	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
		1426
		1427	case EIO_READDIR: eio__scandir (req, self); break;
		1428
		1429	case EIO_BUSY:
		1430	#ifdef _WIN32
		1431	Sleep (req->nv1 * 1000.);
		1432	#else
		1433	{
		1434	struct timeval tv;
		1435
		1436	tv.tv_sec = req->nv1;
		1437	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
		1438
		1439	req->result = select (0, 0, 0, 0, &tv);
		1440	}
		1441	#endif
		1442	break;
		1443
		1444	case EIO_UTIME:
		1445	case EIO_FUTIME:
		1446	{
		1447	struct timeval tv[2];
		1448	struct timeval *times;
		1449
		1450	if (req->nv1 != -1. || req->nv2 != -1.)
		1451	{
		1452	tv[0].tv_sec = req->nv1;
		1453	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1454	tv[1].tv_sec = req->nv2;
		1455	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1456
		1457	times = tv;
		1458	}
		1459	else
		1460	times = 0;
		1461
		1462
		1463	req->result = req->type == EIO_FUTIME
		1464	? futimes (req->int1, times)
		1465	: utimes (req->ptr1, times);
		1466	}
		1467	break;
		1468
		1469	case EIO_GROUP:
		1470	abort (); /* handled in eio_request */
		1471
		1472	case EIO_NOP:
		1473	req->result = 0;
		1474	break;
		1475
		1476	case EIO_CUSTOM:
		1477	((void (*)(eio_req *))req->feed) (req);
		1478	break;
		1479
		1480	default:
		1481	req->result = -1;
		1482	break;
		1483	}
		1484
		1485	req->errorno = errno;
		1486	}
		1487
		1488	#ifndef EIO_NO_WRAPPERS
		1489
		1490	eio_req *eio_nop (int pri, eio_cb cb, void *data)
		1491	{
		1492	REQ (EIO_NOP); SEND;
		1493	}
		1494
		1495	eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
		1496	{
		1497	REQ (EIO_BUSY); req->nv1 = delay; SEND;
		1498	}
		1499
1052	eio_req *eio_fsync (int fd, eio_cb cb)	1500	eio_req *eio_sync (int pri, eio_cb cb, void *data)
1053	{	1501	{
		1502	REQ (EIO_SYNC); SEND;
		1503	}
		1504
		1505	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
		1506	{
1054	REQ (FSYNC); req->int1 = fd; SEND;	1507	REQ (EIO_FSYNC); req->int1 = fd; SEND;
1055	}	1508	}
1056		1509
		1510	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		1511	{
		1512	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		1513	}
		1514
		1515	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		1516	{
		1517	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		1518	}
		1519
		1520	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
		1521	{
		1522	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
		1523	}
		1524
1057	eio_req *eio_fdatasync (int fd, eio_cb cb)	1525	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1058	{	1526	{
1059	REQ (FDATASYNC); req->int1 = fd; SEND;	1527	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
1060	}	1528	}
1061		1529
		1530	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
		1531	{
		1532	REQ (EIO_CLOSE); req->int1 = fd; SEND;
		1533	}
		1534
1062	eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb)	1535	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
1063	{	1536	{
1064	REQ (READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;	1537	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
1065	}	1538	}
1066		1539
1067	eio_req *eio_read (int fd, off_t offset, size_t length, void *data, eio_cb cb)	1540	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
1068	{	1541	{
1069	REQ (READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND;	1542	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1070	}	1543	}
1071		1544
1072	eio_req *eio_write (int fd, off_t offset, size_t length, void *data, eio_cb cb)	1545	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
1073	{	1546	{
1074	REQ (WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND;	1547	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1075	}	1548	}
1076		1549
1077	eio_req *eio_fstat (int fd, eio_cb cb)	1550	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
1078	{	1551	{
1079	REQ (FSTAT); req->int1 = fd; SEND;	1552	REQ (EIO_FSTAT); req->int1 = fd; SEND;
1080	}	1553	}
1081		1554
1082	eio_req *eio_futime (int fd, double atime, double mtime, eio_cb cb)	1555	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
1083	{	1556	{
1084	REQ (FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;	1557	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
1085	}	1558	}
1086		1559
1087	eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb)	1560	eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
1088	{	1561	{
1089	REQ (FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;	1562	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
1090	}	1563	}
1091		1564
1092	eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb)	1565	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
1093	{	1566	{
1094	REQ (FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;	1567	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
1095	}	1568	}
1096		1569
1097	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb)	1570	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
1098	{	1571	{
1099	REQ (FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	1572	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1100	}	1573	}
1101		1574
1102	eio_req *eio_dup2 (int fd, int fd2, eio_cb cb)	1575	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
1103	{	1576	{
1104	REQ (DUP2); req->int1 = fd; req->int2 = fd2; SEND;	1577	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
1105	}	1578	}
1106		1579
1107	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb)	1580	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data)
1108	{	1581	{
1109	REQ (SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;	1582	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
1110	}	1583	}
1111		1584
1112	eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb)	1585	eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
1113	{	1586	{
1114	REQ (OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;	1587	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
1115	}	1588	}
1116		1589
1117	eio_req *eio_readlink (const char *path, eio_cb cb)
1118	{
1119	REQ (READLINK); PATH; SEND;
1120	}
1121
1122	eio_req *eio_stat (const char *path, eio_cb cb)
1123	{
1124	REQ (STAT); PATH; SEND;
1125	}
1126
1127	eio_req *eio_lstat (const char *path, eio_cb cb)
1128	{
1129	REQ (LSTAT); PATH; SEND;
1130	}
1131
1132	eio_req *eio_utime (const char *path, double atime, double mtime, eio_cb cb)	1590	eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
1133	{	1591	{
1134	REQ (UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;	1592	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
1135	}	1593	}
1136		1594
1137	eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb)	1595	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
1138	{	1596	{
1139	REQ (TRUNCATE); PATH; req->offs = offset; SEND;	1597	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
1140	}	1598	}
1141		1599
1142	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb)	1600	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
1143	{	1601	{
1144	REQ (CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	1602	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1145	}	1603	}
1146		1604
1147	eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb)	1605	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1148	{	1606	{
1149	REQ (CHMOD); PATH; req->int2 = (long)mode; SEND;	1607	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
1150	}	1608	}
1151		1609
1152	eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb)	1610	eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1153	{	1611	{
1154	REQ (MKDIR); PATH; req->int2 = (long)mode; SEND;	1612	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
1155	}	1613	}
1156		1614
1157	eio_req *eio_unlink (const char *path, eio_cb cb)	1615	static eio_req *
		1616	eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
1158	{	1617	{
1159	REQ (UNLINK); PATH; SEND;
1160	}
1161
1162	eio_req *eio_rmdir (const char *path, eio_cb cb)
1163	{
1164	REQ (RMDIR); PATH; SEND;	1618	REQ (type); PATH; SEND;
1165	}	1619	}
1166		1620
		1621	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
		1622	{
		1623	return eio__1path (EIO_READLINK, path, pri, cb, data);
		1624	}
		1625
		1626	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
		1627	{
		1628	return eio__1path (EIO_STAT, path, pri, cb, data);
		1629	}
		1630
		1631	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
		1632	{
		1633	return eio__1path (EIO_LSTAT, path, pri, cb, data);
		1634	}
		1635
		1636	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
		1637	{
		1638	return eio__1path (EIO_UNLINK, path, pri, cb, data);
		1639	}
		1640
1167	eio_req *eio_readdir (const char *path, eio_cb cb)	1641	eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
1168	{	1642	{
1169	REQ (READDIR); PATH; SEND;	1643	return eio__1path (EIO_RMDIR, path, pri, cb, data);
1170	}	1644	}
1171		1645
		1646	eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data)
		1647	{
		1648	REQ (EIO_READDIR); PATH; req->int1 = flags; SEND;
		1649	}
		1650
1172	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb)	1651	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
1173	{	1652	{
1174	REQ (MKNOD); PATH; req->int2 = (long)mode; req->int2 = (long)dev; SEND;	1653	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int3 = (long)dev; SEND;
1175	}	1654	}
1176		1655
1177	eio_req *eio_busy (double delay, eio_cb cb)	1656	static eio_req *
		1657	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1178	{	1658	{
1179	REQ (BUSY); req->nv1 = delay; SEND;	1659	REQ (type); PATH;
1180	}
1181		1660
		1661	req->flags |= EIO_FLAG_PTR2_FREE;
		1662	req->ptr2 = strdup (new_path);
		1663	if (!req->ptr2)
		1664	{
		1665	eio_api_destroy (req);
		1666	return 0;
		1667	}
		1668
		1669	SEND;
		1670	}
		1671
		1672	eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1673	{
		1674	return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
		1675	}
		1676
		1677	eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1678	{
		1679	return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
		1680	}
		1681
		1682	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1683	{
		1684	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
		1685	}
		1686
		1687	eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data)
		1688	{
		1689	REQ (EIO_CUSTOM); req->feed = (void (*)(eio_req *))execute; SEND;
		1690	}
		1691
		1692	#endif
		1693
1182	eio_req *eio_nop (eio_cb cb)	1694	eio_req *eio_grp (eio_cb cb, void *data)
1183	{	1695	{
		1696	const int pri = EIO_PRI_MAX;
		1697
1184	REQ (NOP); SEND;	1698	REQ (EIO_GROUP); SEND;
1185	}	1699	}
1186		1700
1187	#undef REQ	1701	#undef REQ
1188	#undef PATH	1702	#undef PATH
1189	#undef SEND	1703	#undef SEND
1190		1704
1191	#if 0	1705	/*****************************************************************************/
1192		1706	/* grp functions */
1193	void
1194	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1195	PROTOTYPE: $$$;$
1196	PPCODE:
1197	{
1198	dREQ;
1199
1200	req->type = EIO_OPEN;
1201	req->sv1 = newSVsv (pathname);
1202	req->ptr1 = SvPVbyte_nolen (req->sv1);
1203	req->int1 = flags;
1204	req->int2 = mode;
1205
1206	EIO_SEND;
1207	}
1208
1209	void
1210	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1211	PROTOTYPE: $;$
1212	ALIAS:
1213	aio_fsync = EIO_FSYNC
1214	aio_fdatasync = EIO_FDATASYNC
1215	PPCODE:
1216	{
1217	dREQ;
1218
1219	req->type = ix;
1220	req->sv1 = newSVsv (fh);
1221	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1222
1223	EIO_SEND (req);
1224	}
1225
1226	void
1227	aio_close (SV *fh, SV *callback=&PL_sv_undef)
1228	PROTOTYPE: $;$
1229	PPCODE:
1230	{
1231	dREQ;
1232
1233	req->type = EIO_CLOSE;
1234	req->sv1 = newSVsv (fh);
1235	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1236
1237	EIO_SEND (req);
1238	}
1239
1240	void
1241	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1242	ALIAS:
1243	aio_read = EIO_READ
1244	aio_write = EIO_WRITE
1245	PROTOTYPE: $$$$$;$
1246	PPCODE:
1247	{
1248	STRLEN svlen;
1249	char *svptr = SvPVbyte (data, svlen);
1250	UV len = SvUV (length);
1251
1252	SvUPGRADE (data, SVt_PV);
1253	SvPOK_on (data);
1254
1255	if (dataoffset < 0)
1256	dataoffset += svlen;
1257
1258	if (dataoffset < 0 || dataoffset > svlen)
1259	croak ("dataoffset outside of data scalar");
1260
1261	if (ix == EIO_WRITE)
1262	{
1263	/* write: check length and adjust. */
1264	if (!SvOK (length) || len + dataoffset > svlen)
1265	len = svlen - dataoffset;
1266	}
1267	else
1268	{
1269	/* read: grow scalar as necessary */
1270	svptr = SvGROW (data, len + dataoffset + 1);
1271	}
1272
1273	if (len < 0)
1274	croak ("length must not be negative");
1275
1276	{
1277	dREQ;
1278
1279	req->type = ix;
1280	req->sv1 = newSVsv (fh);
1281	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1282	: IoOFP (sv_2io (fh)));
1283	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1284	req->size = len;
1285	req->sv2 = SvREFCNT_inc (data);
1286	req->ptr2 = (char *)svptr + dataoffset;
1287	req->stroffset = dataoffset;
1288
1289	if (!SvREADONLY (data))
1290	{
1291	SvREADONLY_on (data);
1292	req->flags |= FLAG_SV2_RO_OFF;
1293	}
1294
1295	EIO_SEND;
1296	}
1297	}
1298
1299	void
1300	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1301	PROTOTYPE: $$;$
1302	PPCODE:
1303	{
1304	SV *data;
1305	dREQ;
1306
1307	data = newSV (NAME_MAX);
1308	SvPOK_on (data);
1309
1310	req->type = EIO_READLINK;
1311	req->sv1 = newSVsv (path);
1312	req->ptr1 = SvPVbyte_nolen (req->sv1);
1313	req->sv2 = data;
1314	req->ptr2 = SvPVbyte_nolen (data);
1315
1316	EIO_SEND;
1317	}
1318
1319	void
1320	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1321	PROTOTYPE: $$$$;$
1322	PPCODE:
1323	{
1324	dREQ;
1325
1326	req->type = EIO_SENDFILE;
1327	req->sv1 = newSVsv (out_fh);
1328	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1329	req->sv2 = newSVsv (in_fh);
1330	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1331	req->offs = SvVAL64 (in_offset);
1332	req->size = length;
1333
1334	EIO_SEND;
1335	}
1336
1337	void
1338	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1339	PROTOTYPE: $$$;$
1340	PPCODE:
1341	{
1342	dREQ;
1343
1344	req->type = EIO_READAHEAD;
1345	req->sv1 = newSVsv (fh);
1346	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1347	req->offs = SvVAL64 (offset);
1348	req->size = length;
1349
1350	EIO_SEND;
1351	}
1352
1353	void
1354	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1355	ALIAS:
1356	aio_stat = EIO_STAT
1357	aio_lstat = EIO_LSTAT
1358	PPCODE:
1359	{
1360	dREQ;
1361
1362	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1363	if (!req->ptr2)
1364	{
1365	req_destroy (req);
1366	croak ("out of memory during aio_stat statdata allocation");
1367	}
1368
1369	req->flags |= FLAG_PTR2_FREE;
1370	req->sv1 = newSVsv (fh_or_path);
1371
1372	if (SvPOK (fh_or_path))
1373	{
1374	req->type = ix;
1375	req->ptr1 = SvPVbyte_nolen (req->sv1);
1376	}
1377	else
1378	{
1379	req->type = EIO_FSTAT;
1380	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1381	}
1382
1383	EIO_SEND;
1384	}
1385
1386	void
1387	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
1388	PPCODE:
1389	{
1390	dREQ;
1391
1392	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1393	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1394	req->sv1 = newSVsv (fh_or_path);
1395
1396	if (SvPOK (fh_or_path))
1397	{
1398	req->type = EIO_UTIME;
1399	req->ptr1 = SvPVbyte_nolen (req->sv1);
1400	}
1401	else
1402	{
1403	req->type = EIO_FUTIME;
1404	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1405	}
1406
1407	EIO_SEND;
1408	}
1409
1410	void
1411	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
1412	PPCODE:
1413	{
1414	dREQ;
1415
1416	req->sv1 = newSVsv (fh_or_path);
1417	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1418
1419	if (SvPOK (fh_or_path))
1420	{
1421	req->type = EIO_TRUNCATE;
1422	req->ptr1 = SvPVbyte_nolen (req->sv1);
1423	}
1424	else
1425	{
1426	req->type = EIO_FTRUNCATE;
1427	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1428	}
1429
1430	EIO_SEND;
1431	}
1432
1433	void
1434	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
1435	ALIAS:
1436	aio_chmod = EIO_CHMOD
1437	aio_fchmod = EIO_FCHMOD
1438	aio_mkdir = EIO_MKDIR
1439	PPCODE:
1440	{
1441	dREQ;
1442
1443	req->type = type;
1444	req->int2 = mode;
1445	req->sv1 = newSVsv (fh_or_path);
1446
1447	if (ix == EIO_FCHMOD)
1448	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1449	else
1450	req->ptr1 = SvPVbyte_nolen (req->sv1);
1451
1452	EIO_SEND;
1453	}
1454
1455	void
1456	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
1457	PPCODE:
1458	{
1459	dREQ;
1460
1461	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1462	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1463	req->sv1 = newSVsv (fh_or_path);
1464
1465	if (SvPOK (fh_or_path))
1466	{
1467	req->type = EIO_CHOWN;
1468	req->ptr1 = SvPVbyte_nolen (req->sv1);
1469	}
1470	else
1471	{
1472	req->type = EIO_FCHOWN;
1473	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1474	}
1475
1476	EIO_SEND;
1477	}
1478
1479	void
1480	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1481	ALIAS:
1482	aio_unlink = EIO_UNLINK
1483	aio_rmdir = EIO_RMDIR
1484	aio_readdir = EIO_READDIR
1485	PPCODE:
1486	{
1487	dREQ;
1488
1489	req->type = ix;
1490	req->sv1 = newSVsv (pathname);
1491	req->ptr1 = SvPVbyte_nolen (req->sv1);
1492
1493	EIO_SEND;
1494	}
1495
1496	void
1497	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1498	ALIAS:
1499	aio_link = EIO_LINK
1500	aio_symlink = EIO_SYMLINK
1501	aio_rename = EIO_RENAME
1502	PPCODE:
1503	{
1504	dREQ;
1505
1506	req->type = ix;
1507	req->sv1 = newSVsv (oldpath);
1508	req->ptr1 = SvPVbyte_nolen (req->sv1);
1509	req->sv2 = newSVsv (newpath);
1510	req->ptr2 = SvPVbyte_nolen (req->sv2);
1511
1512	EIO_SEND;
1513	}
1514
1515	void
1516	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1517	PPCODE:
1518	{
1519	dREQ;
1520
1521	req->type = EIO_MKNOD;
1522	req->sv1 = newSVsv (pathname);
1523	req->ptr1 = SvPVbyte_nolen (req->sv1);
1524	req->int2 = (mode_t)mode;
1525	req->offs = dev;
1526
1527	EIO_SEND;
1528	}
1529
1530	void
1531	aio_busy (double delay, SV *callback=&PL_sv_undef)
1532	PPCODE:
1533	{
1534	dREQ;
1535
1536	req->type = EIO_BUSY;
1537	req->nv1 = delay < 0. ? 0. : delay;
1538
1539	EIO_SEND;
1540	}
1541
1542	void
1543	aio_group (SV *callback=&PL_sv_undef)
1544	PROTOTYPE: ;$
1545	PPCODE:
1546	{
1547	dREQ;
1548
1549	req->type = EIO_GROUP;
1550
1551	req_send (req);
1552	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1553	}
1554
1555	void
1556	aio_nop (SV *callback=&PL_sv_undef)
1557	ALIAS:
1558	aio_nop = EIO_NOP
1559	aio_sync = EIO_SYNC
1560	PPCODE:
1561	{
1562	dREQ;
1563
1564	#endif
1565		1707
1566	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)	1708	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1567	{	1709	{
1568	grp->int2 = limit;	1710	grp->int2 = limit;
1569	grp->feed = feed;	1711	grp->feed = feed;
…		…
1580		1722
1581	void eio_grp_add (eio_req *grp, eio_req *req)	1723	void eio_grp_add (eio_req *grp, eio_req *req)
1582	{	1724	{
1583	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	1725	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
1584		1726
		1727	grp->flags |= EIO_FLAG_GROUPADD;
		1728
1585	++grp->size;	1729	++grp->size;
1586	req->grp = grp;	1730	req->grp = grp;
1587		1731
1588	req->grp_prev = 0;	1732	req->grp_prev = 0;
1589	req->grp_next = grp->grp_first;	1733	req->grp_next = grp->grp_first;
…		…
1592	grp->grp_first->grp_prev = req;	1736	grp->grp_first->grp_prev = req;
1593		1737
1594	grp->grp_first = req;	1738	grp->grp_first = req;
1595	}	1739	}
1596		1740
		1741	/*****************************************************************************/
		1742	/* misc garbage */
1597		1743
		1744	ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
		1745	{
		1746	etp_worker wrk;
		1747
		1748	wrk.dbuf = 0;
		1749
		1750	eio__sendfile (ofd, ifd, offset, count, &wrk);
		1751
		1752	if (wrk.dbuf)
		1753	free (wrk.dbuf);
		1754	}
		1755

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