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Comparing libeio/eio.c (file contents):
Revision 1.11 by root, Tue May 13 18:50:27 2008 UTC vs.
Revision 1.25 by root, Tue Sep 30 17:23:24 2008 UTC

		1	/*
		2	* libeio implementation
		3	*
		4	* Copyright (c) 2007,2008 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"
2	#include "xthread.h"	41	#include "xthread.h"
3		42
4	#include <errno.h>	43	#include <errno.h>
5	#include <stddef.h>	44	#include <stddef.h>
…		…
70	/* buffer size for various temporary buffers */	109	/* buffer size for various temporary buffers */
71	#define EIO_BUFSIZE 65536	110	#define EIO_BUFSIZE 65536
72		111
73	#define dBUF \	112	#define dBUF \
74	char *eio_buf; \	113	char *eio_buf; \
75	X_LOCK (wrklock); \	114	ETP_WORKER_LOCK (self); \
76	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	115	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \
77	X_UNLOCK (wrklock); \	116	ETP_WORKER_UNLOCK (self); \
78	errno = ENOMEM; \	117	errno = ENOMEM; \
79	if (!eio_buf) \	118	if (!eio_buf) \
80	return -1;	119	return -1;
81		120
82	#define EIO_TICKS ((1000000 + 1023) >> 10)	121	#define EIO_TICKS ((1000000 + 1023) >> 10)
83		122
		123	/*****************************************************************************/
		124
		125	#if __GNUC__ >= 3
		126	# define expect(expr,value) __builtin_expect ((expr),(value))
		127	#else
		128	# define expect(expr,value) (expr)
		129	#endif
		130
		131	#define expect_false(expr) expect ((expr) != 0, 0)
		132	#define expect_true(expr) expect ((expr) != 0, 1)
		133
		134	/*****************************************************************************/
		135
		136	#define ETP_PRI_MIN EIO_PRI_MIN
		137	#define ETP_PRI_MAX EIO_PRI_MAX
		138
		139	struct etp_worker;
		140
		141	#define ETP_REQ eio_req
		142	#define ETP_DESTROY(req) eio_destroy (req)
		143	static int eio_finish (eio_req *req);
		144	#define ETP_FINISH(req) eio_finish (req)
		145	static void eio_execute (struct etp_worker *self, eio_req *req);
		146	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)
		147
		148	#define ETP_WORKER_CLEAR(req) \
		149	if (wrk->dbuf) \
		150	{ \
		151	free (wrk->dbuf); \
		152	wrk->dbuf = 0; \
		153	} \
		154	\
		155	if (wrk->dirp) \
		156	{ \
		157	closedir (wrk->dirp); \
		158	wrk->dirp = 0; \
		159	}
		160	#define ETP_WORKER_COMMON \
		161	void *dbuf; \
		162	DIR *dirp;
		163
		164	/*****************************************************************************/
		165
		166	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
		167
		168	/* calculcate time difference in ~1/EIO_TICKS of a second */
		169	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		170	{
		171	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
		172	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		173	}
		174
		175	static unsigned int started, idle, wanted = 4;
		176
84	static void (*want_poll_cb) (void);	177	static void (*want_poll_cb) (void);
85	static void (*done_poll_cb) (void);	178	static void (*done_poll_cb) (void);
86		179
87	static unsigned int max_poll_time = 0;	180	static unsigned int max_poll_time; /* reslock */
88	static unsigned int max_poll_reqs = 0;	181	static unsigned int max_poll_reqs; /* reslock */
89		182
90	/* calculcate time difference in ~1/EIO_TICKS of a second */	183	static volatile unsigned int nreqs; /* reqlock */
91	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	184	static volatile unsigned int nready; /* reqlock */
92	{	185	static volatile unsigned int npending; /* reqlock */
93	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	186	static volatile unsigned int max_idle = 4;
94	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
95	}
96		187
97	static unsigned int started, idle, wanted = 4;
98
99	/* worker threads management */
100	static mutex_t wrklock = X_MUTEX_INIT;	188	static mutex_t wrklock = X_MUTEX_INIT;
101
102	typedef struct worker
103	{
104	/* locked by wrklock */
105	struct worker *prev, *next;
106
107	thread_t tid;
108
109	/* locked by reslock, reqlock or wrklock */
110	eio_req *req; /* currently processed request */
111	void *dbuf;
112	DIR *dirp;
113	} worker;
114
115	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
116
117	static void worker_clear (worker *wrk)
118	{
119	if (wrk->dirp)
120	{
121	closedir (wrk->dirp);
122	wrk->dirp = 0;
123	}
124
125	if (wrk->dbuf)
126	{
127	free (wrk->dbuf);
128	wrk->dbuf = 0;
129	}
130	}
131
132	static void worker_free (worker *wrk)
133	{
134	wrk->next->prev = wrk->prev;
135	wrk->prev->next = wrk->next;
136
137	free (wrk);
138	}
139
140	static volatile unsigned int nreqs, nready, npending;
141	static volatile unsigned int max_idle = 4;
142
143	static mutex_t reslock = X_MUTEX_INIT;	189	static mutex_t reslock = X_MUTEX_INIT;
144	static mutex_t reqlock = X_MUTEX_INIT;	190	static mutex_t reqlock = X_MUTEX_INIT;
145	static cond_t reqwait = X_COND_INIT;	191	static cond_t reqwait = X_COND_INIT;
146		192
		193	#if !HAVE_PREADWRITE
		194	/*
		195	* make our pread/pwrite emulation safe against themselves, but not against
		196	* normal read/write by using a mutex. slows down execution a lot,
		197	* but that's your problem, not mine.
		198	*/
		199	static mutex_t preadwritelock = X_MUTEX_INIT;
		200	#endif
		201
		202	typedef struct etp_worker
		203	{
		204	/* locked by wrklock */
		205	struct etp_worker *prev, *next;
		206
		207	thread_t tid;
		208
		209	/* locked by reslock, reqlock or wrklock */
		210	ETP_REQ *req; /* currently processed request */
		211
		212	ETP_WORKER_COMMON
		213	} etp_worker;
		214
		215	static etp_worker wrk_first = { &wrk_first, &wrk_first, 0 }; /* NOT etp */
		216
		217	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
		218	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
		219
		220	/* worker threads management */
		221
		222	static void etp_worker_clear (etp_worker *wrk)
		223	{
		224	ETP_WORKER_CLEAR (wrk);
		225	}
		226
		227	static void etp_worker_free (etp_worker *wrk)
		228	{
		229	wrk->next->prev = wrk->prev;
		230	wrk->prev->next = wrk->next;
		231
		232	free (wrk);
		233	}
		234
147	unsigned int eio_nreqs (void)	235	static unsigned int etp_nreqs (void)
148	{	236	{
		237	int retval;
		238	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		239	retval = nreqs;
		240	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
149	return nreqs;	241	return retval;
150	}	242	}
151		243
152	unsigned int eio_nready (void)	244	static unsigned int etp_nready (void)
153	{	245	{
154	unsigned int retval;	246	unsigned int retval;
155		247
156	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	248	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
157	retval = nready;	249	retval = nready;
158	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	250	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
159		251
160	return retval;	252	return retval;
161	}	253	}
162		254
163	unsigned int eio_npending (void)	255	static unsigned int etp_npending (void)
164	{	256	{
165	unsigned int retval;	257	unsigned int retval;
166		258
167	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	259	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
168	retval = npending;	260	retval = npending;
169	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	261	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
170		262
171	return retval;	263	return retval;
172	}	264	}
173		265
174	unsigned int eio_nthreads (void)	266	static unsigned int etp_nthreads (void)
175	{	267	{
176	unsigned int retval;	268	unsigned int retval;
177		269
178	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	270	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
179	retval = started;	271	retval = started;
…		…
186	* a somewhat faster data structure might be nice, but	278	* a somewhat faster data structure might be nice, but
187	* with 8 priorities this actually needs <20 insns	279	* with 8 priorities this actually needs <20 insns
188	* per shift, the most expensive operation.	280	* per shift, the most expensive operation.
189	*/	281	*/
190	typedef struct {	282	typedef struct {
191	eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */	283	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
192	int size;	284	int size;
193	} reqq;	285	} etp_reqq;
194		286
195	static reqq req_queue;	287	static etp_reqq req_queue;
196	static reqq res_queue;	288	static etp_reqq res_queue;
197		289
198	static int reqq_push (reqq *q, eio_req *req)	290	static int reqq_push (etp_reqq *q, ETP_REQ *req)
199	{	291	{
200	int pri = req->pri;	292	int pri = req->pri;
201	req->next = 0;	293	req->next = 0;
202		294
203	if (q->qe[pri])	295	if (q->qe[pri])
…		…
209	q->qe[pri] = q->qs[pri] = req;	301	q->qe[pri] = q->qs[pri] = req;
210		302
211	return q->size++;	303	return q->size++;
212	}	304	}
213		305
214	static eio_req *reqq_shift (reqq *q)	306	static ETP_REQ *reqq_shift (etp_reqq *q)
215	{	307	{
216	int pri;	308	int pri;
217		309
218	if (!q->size)	310	if (!q->size)
219	return 0;	311	return 0;
220		312
221	--q->size;	313	--q->size;
222		314
223	for (pri = EIO_NUM_PRI; pri--; )	315	for (pri = ETP_NUM_PRI; pri--; )
224	{	316	{
225	eio_req *req = q->qs[pri];	317	eio_req *req = q->qs[pri];
226		318
227	if (req)	319	if (req)
228	{	320	{
…		…
233	}	325	}
234	}	326	}
235		327
236	abort ();	328	abort ();
237	}	329	}
		330
		331	static void etp_atfork_prepare (void)
		332	{
		333	X_LOCK (wrklock);
		334	X_LOCK (reqlock);
		335	X_LOCK (reslock);
		336	#if !HAVE_PREADWRITE
		337	X_LOCK (preadwritelock);
		338	#endif
		339	}
		340
		341	static void etp_atfork_parent (void)
		342	{
		343	#if !HAVE_PREADWRITE
		344	X_UNLOCK (preadwritelock);
		345	#endif
		346	X_UNLOCK (reslock);
		347	X_UNLOCK (reqlock);
		348	X_UNLOCK (wrklock);
		349	}
		350
		351	static void etp_atfork_child (void)
		352	{
		353	ETP_REQ *prv;
		354
		355	while ((prv = reqq_shift (&req_queue)))
		356	ETP_DESTROY (prv);
		357
		358	while ((prv = reqq_shift (&res_queue)))
		359	ETP_DESTROY (prv);
		360
		361	while (wrk_first.next != &wrk_first)
		362	{
		363	etp_worker *wrk = wrk_first.next;
		364
		365	if (wrk->req)
		366	ETP_DESTROY (wrk->req);
		367
		368	etp_worker_clear (wrk);
		369	etp_worker_free (wrk);
		370	}
		371
		372	started = 0;
		373	idle = 0;
		374	nreqs = 0;
		375	nready = 0;
		376	npending = 0;
		377
		378	etp_atfork_parent ();
		379	}
		380
		381	static void
		382	etp_once_init (void)
		383	{
		384	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
		385	}
		386
		387	static int
		388	etp_init (void (*want_poll)(void), void (*done_poll)(void))
		389	{
		390	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
		391
		392	pthread_once (&doinit, etp_once_init);
		393
		394	want_poll_cb = want_poll;
		395	done_poll_cb = done_poll;
		396
		397	return 0;
		398	}
		399
		400	X_THREAD_PROC (etp_proc);
		401
		402	static void etp_start_thread (void)
		403	{
		404	etp_worker *wrk = calloc (1, sizeof (etp_worker));
		405
		406	/*TODO*/
		407	assert (("unable to allocate worker thread data", wrk));
		408
		409	X_LOCK (wrklock);
		410
		411	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
		412	{
		413	wrk->prev = &wrk_first;
		414	wrk->next = wrk_first.next;
		415	wrk_first.next->prev = wrk;
		416	wrk_first.next = wrk;
		417	++started;
		418	}
		419	else
		420	free (wrk);
		421
		422	X_UNLOCK (wrklock);
		423	}
		424
		425	static void etp_maybe_start_thread (void)
		426	{
		427	if (expect_true (etp_nthreads () >= wanted))
		428	return;
		429
		430	/* todo: maybe use idle here, but might be less exact */
		431	if (expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
		432	return;
		433
		434	etp_start_thread ();
		435	}
		436
		437	static void etp_end_thread (void)
		438	{
		439	eio_req *req = calloc (1, sizeof (eio_req));
		440
		441	req->type = -1;
		442	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
		443
		444	X_LOCK (reqlock);
		445	reqq_push (&req_queue, req);
		446	X_COND_SIGNAL (reqwait);
		447	X_UNLOCK (reqlock);
		448
		449	X_LOCK (wrklock);
		450	--started;
		451	X_UNLOCK (wrklock);
		452	}
		453
		454	static int etp_poll (void)
		455	{
		456	unsigned int maxreqs;
		457	unsigned int maxtime;
		458	struct timeval tv_start, tv_now;
		459
		460	X_LOCK (reslock);
		461	maxreqs = max_poll_reqs;
		462	maxtime = max_poll_time;
		463	X_UNLOCK (reslock);
		464
		465	if (maxtime)
		466	gettimeofday (&tv_start, 0);
		467
		468	for (;;)
		469	{
		470	ETP_REQ *req;
		471
		472	etp_maybe_start_thread ();
		473
		474	X_LOCK (reslock);
		475	req = reqq_shift (&res_queue);
		476
		477	if (req)
		478	{
		479	--npending;
		480
		481	if (!res_queue.size && done_poll_cb)
		482	done_poll_cb ();
		483	}
		484
		485	X_UNLOCK (reslock);
		486
		487	if (!req)
		488	return 0;
		489
		490	X_LOCK (reqlock);
		491	--nreqs;
		492	X_UNLOCK (reqlock);
		493
		494	if (expect_false (req->type == EIO_GROUP && req->size))
		495	{
		496	req->int1 = 1; /* mark request as delayed */
		497	continue;
		498	}
		499	else
		500	{
		501	int res = ETP_FINISH (req);
		502	if (expect_false (res))
		503	return res;
		504	}
		505
		506	if (expect_false (maxreqs && !--maxreqs))
		507	break;
		508
		509	if (maxtime)
		510	{
		511	gettimeofday (&tv_now, 0);
		512
		513	if (tvdiff (&tv_start, &tv_now) >= maxtime)
		514	break;
		515	}
		516	}
		517
		518	errno = EAGAIN;
		519	return -1;
		520	}
		521
		522	static void etp_cancel (ETP_REQ *req)
		523	{
		524	X_LOCK (wrklock);
		525	req->flags |= EIO_FLAG_CANCELLED;
		526	X_UNLOCK (wrklock);
		527
		528	eio_grp_cancel (req);
		529	}
		530
		531	static void etp_submit (ETP_REQ *req)
		532	{
		533	req->pri -= ETP_PRI_MIN;
		534
		535	if (expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
		536	if (expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
		537
		538	if (expect_false (req->type == EIO_GROUP))
		539	{
		540	/* I hope this is worth it :/ */
		541	X_LOCK (reqlock);
		542	++nreqs;
		543	X_UNLOCK (reqlock);
		544
		545	X_LOCK (reslock);
		546
		547	++npending;
		548
		549	if (!reqq_push (&res_queue, req) && want_poll_cb)
		550	want_poll_cb ();
		551
		552	X_UNLOCK (reslock);
		553	}
		554	else
		555	{
		556	X_LOCK (reqlock);
		557	++nreqs;
		558	++nready;
		559	reqq_push (&req_queue, req);
		560	X_COND_SIGNAL (reqwait);
		561	X_UNLOCK (reqlock);
		562
		563	etp_maybe_start_thread ();
		564	}
		565	}
		566
		567	static void etp_set_max_poll_time (double nseconds)
		568	{
		569	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		570	max_poll_time = nseconds;
		571	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		572	}
		573
		574	static void etp_set_max_poll_reqs (unsigned int maxreqs)
		575	{
		576	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		577	max_poll_reqs = maxreqs;
		578	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		579	}
		580
		581	static void etp_set_max_idle (unsigned int nthreads)
		582	{
		583	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		584	max_idle = nthreads <= 0 ? 1 : nthreads;
		585	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		586	}
		587
		588	static void etp_set_min_parallel (unsigned int nthreads)
		589	{
		590	if (wanted < nthreads)
		591	wanted = nthreads;
		592	}
		593
		594	static void etp_set_max_parallel (unsigned int nthreads)
		595	{
		596	if (wanted > nthreads)
		597	wanted = nthreads;
		598
		599	while (started > wanted)
		600	etp_end_thread ();
		601	}
		602
		603	/*****************************************************************************/
238		604
239	static void grp_try_feed (eio_req *grp)	605	static void grp_try_feed (eio_req *grp)
240	{	606	{
241	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	607	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
242	{	608	{
…		…
251	break;	617	break;
252	}	618	}
253	}	619	}
254	}	620	}
255		621
256	static int eio_finish (eio_req *req);
257
258	static int grp_dec (eio_req *grp)	622	static int grp_dec (eio_req *grp)
259	{	623	{
260	--grp->size;	624	--grp->size;
261		625
262	/* call feeder, if applicable */	626	/* call feeder, if applicable */
…		…
310	eio_cancel (grp);	674	eio_cancel (grp);
311	}	675	}
312		676
313	void eio_cancel (eio_req *req)	677	void eio_cancel (eio_req *req)
314	{	678	{
315	X_LOCK (wrklock);
316	req->flags |= EIO_FLAG_CANCELLED;
317	X_UNLOCK (wrklock);
318
319	eio_grp_cancel (req);	679	etp_cancel (req);
320	}
321
322	X_THREAD_PROC (eio_proc);
323
324	static void start_thread (void)
325	{
326	worker *wrk = calloc (1, sizeof (worker));
327
328	/*TODO*/
329	assert (("unable to allocate worker thread data", wrk));
330
331	X_LOCK (wrklock);
332
333	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))
334	{
335	wrk->prev = &wrk_first;
336	wrk->next = wrk_first.next;
337	wrk_first.next->prev = wrk;
338	wrk_first.next = wrk;
339	++started;
340	}
341	else
342	free (wrk);
343
344	X_UNLOCK (wrklock);
345	}
346
347	static void maybe_start_thread (void)
348	{
349	if (eio_nthreads () >= wanted)
350	return;
351
352	/* todo: maybe use idle here, but might be less exact */
353	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())
354	return;
355
356	start_thread ();
357	}	680	}
358		681
359	void eio_submit (eio_req *req)	682	void eio_submit (eio_req *req)
360	{	683	{
361	req->pri += EIO_PRI_BIAS;	684	etp_submit (req);
362
363	if (req->pri < EIO_PRI_MIN + EIO_PRI_BIAS) req->pri = EIO_PRI_MIN + EIO_PRI_BIAS;
364	if (req->pri > EIO_PRI_MAX + EIO_PRI_BIAS) req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;
365
366	++nreqs;
367
368	X_LOCK (reqlock);
369	++nready;
370	reqq_push (&req_queue, req);
371	X_COND_SIGNAL (reqwait);
372	X_UNLOCK (reqlock);
373
374	maybe_start_thread ();
375	}	685	}
376		686
377	static void end_thread (void)	687	unsigned int eio_nreqs (void)
378	{	688	{
379	eio_req *req = calloc (1, sizeof (eio_req));	689	return etp_nreqs ();
		690	}
380		691
381	req->type = EIO_QUIT;	692	unsigned int eio_nready (void)
382	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	693	{
		694	return etp_nready ();
		695	}
383		696
384	X_LOCK (reqlock);	697	unsigned int eio_npending (void)
385	reqq_push (&req_queue, req);	698	{
386	X_COND_SIGNAL (reqwait);	699	return etp_npending ();
387	X_UNLOCK (reqlock);	700	}
388		701
389	X_LOCK (wrklock);	702	unsigned int eio_nthreads (void)
390	--started;	703	{
391	X_UNLOCK (wrklock);	704	return etp_nthreads ();
392	}	705	}
393		706
394	void eio_set_max_poll_time (double nseconds)	707	void eio_set_max_poll_time (double nseconds)
395	{	708	{
396	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
397	max_poll_time = nseconds;	709	etp_set_max_poll_time (nseconds);
398	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
399	}	710	}
400		711
401	void eio_set_max_poll_reqs (unsigned int maxreqs)	712	void eio_set_max_poll_reqs (unsigned int maxreqs)
402	{	713	{
403	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
404	max_poll_reqs = maxreqs;	714	etp_set_max_poll_reqs (maxreqs);
405	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
406	}	715	}
407		716
408	void eio_set_max_idle (unsigned int nthreads)	717	void eio_set_max_idle (unsigned int nthreads)
409	{	718	{
410	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	719	etp_set_max_idle (nthreads);
411	max_idle = nthreads <= 0 ? 1 : nthreads;
412	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
413	}	720	}
414		721
415	void eio_set_min_parallel (unsigned int nthreads)	722	void eio_set_min_parallel (unsigned int nthreads)
416	{	723	{
417	if (wanted < nthreads)	724	etp_set_min_parallel (nthreads);
418	wanted = nthreads;
419	}	725	}
420		726
421	void eio_set_max_parallel (unsigned int nthreads)	727	void eio_set_max_parallel (unsigned int nthreads)
422	{	728	{
423	if (wanted > nthreads)	729	etp_set_max_parallel (nthreads);
424	wanted = nthreads;
425
426	while (started > wanted)
427	end_thread ();
428	}	730	}
429		731
430	int eio_poll (void)	732	int eio_poll (void)
431	{	733	{
432	int maxreqs = max_poll_reqs;	734	return etp_poll ();
433	struct timeval tv_start, tv_now;
434	eio_req *req;
435
436	if (max_poll_time)
437	gettimeofday (&tv_start, 0);
438
439	for (;;)
440	{
441	maybe_start_thread ();
442
443	X_LOCK (reslock);
444	req = reqq_shift (&res_queue);
445
446	if (req)
447	{
448	--npending;
449
450	if (!res_queue.size && done_poll_cb)
451	done_poll_cb ();
452	}
453
454	X_UNLOCK (reslock);
455
456	if (!req)
457	return 0;
458
459	--nreqs;
460
461	if (req->type == EIO_GROUP && req->size)
462	{
463	req->int1 = 1; /* mark request as delayed */
464	continue;
465	}
466	else
467	{
468	int res = eio_finish (req);
469	if (res)
470	return res;
471	}
472
473	if (maxreqs && !--maxreqs)
474	break;
475
476	if (max_poll_time)
477	{
478	gettimeofday (&tv_now, 0);
479
480	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
481	break;
482	}
483	}
484
485	errno = EAGAIN;
486	return -1;
487	}	735	}
488		736
489	/*****************************************************************************/	737	/*****************************************************************************/
490	/* work around various missing functions */	738	/* work around various missing functions */
491		739
492	#if !HAVE_PREADWRITE	740	#if !HAVE_PREADWRITE
493	# define pread eio__pread	741	# define pread eio__pread
494	# define pwrite eio__pwrite	742	# define pwrite eio__pwrite
495
496	/*
497	* make our pread/pwrite safe against themselves, but not against
498	* normal read/write by using a mutex. slows down execution a lot,
499	* but that's your problem, not mine.
500	*/
501	static mutex_t preadwritelock = X_MUTEX_INIT;
502		743
503	static ssize_t	744	static ssize_t
504	eio__pread (int fd, void *buf, size_t count, off_t offset)	745	eio__pread (int fd, void *buf, size_t count, off_t offset)
505	{	746	{
506	ssize_t res;	747	ssize_t res;
…		…
568		809
569	#if !HAVE_READAHEAD	810	#if !HAVE_READAHEAD
570	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)	811	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
571		812
572	static ssize_t	813	static ssize_t
573	eio__readahead (int fd, off_t offset, size_t count, worker *self)	814	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
574	{	815	{
575	size_t todo = count;	816	size_t todo = count;
576	dBUF;	817	dBUF;
577		818
578	while (todo > 0)	819	while (todo > 0)
…		…
588	return count;	829	return count;
589	}	830	}
590		831
591	#endif	832	#endif
592		833
593	#if !HAVE_READDIR_R
594	# define readdir_r eio__readdir_r
595
596	static mutex_t readdirlock = X_MUTEX_INIT;
597
598	static int
599	eio__readdir_r (DIR *dirp, EIO_STRUCT_DIRENT *ent, EIO_STRUCT_DIRENT **res)
600	{
601	EIO_STRUCT_DIRENT *e;
602	int errorno;
603
604	X_LOCK (readdirlock);
605
606	e = readdir (dirp);
607	errorno = errno;
608
609	if (e)
610	{
611	*res = ent;
612	strcpy (ent->d_name, e->d_name);
613	}
614	else
615	*res = 0;
616
617	X_UNLOCK (readdirlock);
618
619	errno = errorno;
620	return e ? 0 : -1;
621	}
622	#endif
623
624	/* sendfile always needs emulation */	834	/* sendfile always needs emulation */
625	static ssize_t	835	static ssize_t
626	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, worker *self)	836	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)
627	{	837	{
628	ssize_t res;	838	ssize_t res;
629		839
630	if (!count)	840	if (!count)
631	return 0;	841	return 0;
…		…
715	return res;	925	return res;
716	}	926	}
717		927
718	/* read a full directory */	928	/* read a full directory */
719	static void	929	static void
720	eio__scandir (eio_req *req, worker *self)	930	eio__scandir (eio_req *req, etp_worker *self)
721	{	931	{
722	DIR *dirp;	932	DIR *dirp;
723	union
724	{
725	EIO_STRUCT_DIRENT d;
726	char b [offsetof (EIO_STRUCT_DIRENT, d_name) + NAME_MAX + 1];
727	} *u;
728	EIO_STRUCT_DIRENT *entp;	933	EIO_STRUCT_DIRENT *entp;
729	char *name, *names;	934	char *name, *names;
730	int memlen = 4096;	935	int memlen = 4096;
731	int memofs = 0;	936	int memofs = 0;
732	int res = 0;	937	int res = 0;
733		938
734	X_LOCK (wrklock);	939	X_LOCK (wrklock);
		940	/* the corresponding closedir is in ETP_WORKER_CLEAR */
735	self->dirp = dirp = opendir (req->ptr1);	941	self->dirp = dirp = opendir (req->ptr1);
736	self->dbuf = u = malloc (sizeof (*u));
737	req->flags |= EIO_FLAG_PTR2_FREE;	942	req->flags |= EIO_FLAG_PTR2_FREE;
738	req->ptr2 = names = malloc (memlen);	943	req->ptr2 = names = malloc (memlen);
739	X_UNLOCK (wrklock);	944	X_UNLOCK (wrklock);
740		945
741	if (dirp && u && names)	946	if (dirp && names)
742	for (;;)	947	for (;;)
743	{	948	{
744	errno = 0;	949	errno = 0;
745	readdir_r (dirp, &u->d, &entp);	950	entp = readdir (dirp);
746		951
747	if (!entp)	952	if (!entp)
748	break;	953	break;
749		954
750	name = entp->d_name;	955	name = entp->d_name;
…		…
773		978
774	if (errno)	979	if (errno)
775	res = -1;	980	res = -1;
776		981
777	req->result = res;	982	req->result = res;
		983	}
		984
		985	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
		986	# define msync(a,b,c) ENOSYS
		987	#endif
		988
		989	int
		990	eio__mtouch (void *mem, size_t len, int flags)
		991	{
		992	intptr_t addr = (intptr_t)mem;
		993	intptr_t end = addr + len;
		994	#ifdef PAGESIZE
		995	const intptr_t page = PAGESIZE;
		996	#else
		997	static intptr_t page;
		998
		999	if (!page)
		1000	page = sysconf (_SC_PAGESIZE);
		1001	#endif
		1002
		1003	addr &= ~(page - 1); /* assume page size is always a power of two */
		1004
		1005	if (addr < end)
		1006	if (flags) /* modify */
		1007	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len);
		1008	else
		1009	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len);
		1010
		1011	return 0;
778	}	1012	}
779		1013
780	/*****************************************************************************/	1014	/*****************************************************************************/
781		1015
782	#define ALLOC(len) \	1016	#define ALLOC(len) \
…		…
792	req->result = -1; \	1026	req->result = -1; \
793	break; \	1027	break; \
794	} \	1028	} \
795	}	1029	}
796		1030
797	X_THREAD_PROC (eio_proc)	1031	X_THREAD_PROC (etp_proc)
798	{	1032	{
799	eio_req *req;	1033	ETP_REQ *req;
800	struct timespec ts;	1034	struct timespec ts;
801	worker *self = (worker *)thr_arg;	1035	etp_worker *self = (etp_worker *)thr_arg;
802		1036
803	/* try to distribute timeouts somewhat randomly */	1037	/* try to distribute timeouts somewhat randomly */
804	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1038	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
805		1039
806	for (;;)	1040	for (;;)
807	{	1041	{
808	ts.tv_sec = time (0) + IDLE_TIMEOUT;
809
810	X_LOCK (reqlock);	1042	X_LOCK (reqlock);
811		1043
812	for (;;)	1044	for (;;)
813	{	1045	{
814	self->req = req = reqq_shift (&req_queue);	1046	self->req = req = reqq_shift (&req_queue);
…		…
816	if (req)	1048	if (req)
817	break;	1049	break;
818		1050
819	++idle;	1051	++idle;
820		1052
		1053	ts.tv_sec = time (0) + IDLE_TIMEOUT;
821	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1054	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
822	{	1055	{
823	if (idle > max_idle)	1056	if (idle > max_idle)
824	{	1057	{
825	--idle;	1058	--idle;
…		…
830	goto quit;	1063	goto quit;
831	}	1064	}
832		1065
833	/* we are allowed to idle, so do so without any timeout */	1066	/* we are allowed to idle, so do so without any timeout */
834	X_COND_WAIT (reqwait, reqlock);	1067	X_COND_WAIT (reqwait, reqlock);
835	ts.tv_sec = time (0) + IDLE_TIMEOUT;
836	}	1068	}
837		1069
838	--idle;	1070	--idle;
839	}	1071	}
840		1072
841	--nready;	1073	--nready;
842		1074
843	X_UNLOCK (reqlock);	1075	X_UNLOCK (reqlock);
844		1076
845	errno = 0; /* strictly unnecessary */	1077	if (req->type < 0)
		1078	goto quit;
846		1079
847	if (!EIO_CANCELLED (req))	1080	if (!EIO_CANCELLED (req))
848	switch (req->type)	1081	ETP_EXECUTE (self, req);
849	{
850	case EIO_READ: ALLOC (req->size);
851	req->result = req->offs >= 0
852	? pread (req->int1, req->ptr2, req->size, req->offs)
853	: read (req->int1, req->ptr2, req->size); break;
854	case EIO_WRITE: req->result = req->offs >= 0
855	? pwrite (req->int1, req->ptr2, req->size, req->offs)
856	: write (req->int1, req->ptr2, req->size); break;
857
858	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
859	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break;
860
861	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
862	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
863	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
864	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
865	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
866	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
867
868	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
869	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
870	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
871	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
872	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
873	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
874
875	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
876	case EIO_CLOSE: req->result = close (req->int1); break;
877	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
878	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
879	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
880	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
881	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
882	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
883	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
884	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
885
886	case EIO_READLINK: ALLOC (NAME_MAX);
887	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
888
889	case EIO_SYNC: req->result = 0; sync (); break;
890	case EIO_FSYNC: req->result = fsync (req->int1); break;
891	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
892
893	case EIO_READDIR: eio__scandir (req, self); break;
894
895	case EIO_BUSY:
896	#ifdef _WIN32
897	Sleep (req->nv1 * 1000.);
898	#else
899	{
900	struct timeval tv;
901
902	tv.tv_sec = req->nv1;
903	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
904
905	req->result = select (0, 0, 0, 0, &tv);
906	}
907	#endif
908	break;
909
910	case EIO_UTIME:
911	case EIO_FUTIME:
912	{
913	struct timeval tv[2];
914	struct timeval *times;
915
916	if (req->nv1 != -1. || req->nv2 != -1.)
917	{
918	tv[0].tv_sec = req->nv1;
919	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
920	tv[1].tv_sec = req->nv2;
921	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
922
923	times = tv;
924	}
925	else
926	times = 0;
927
928
929	req->result = req->type == EIO_FUTIME
930	? futimes (req->int1, times)
931	: utimes (req->ptr1, times);
932	}
933
934	case EIO_GROUP:
935	case EIO_NOP:
936	req->result = 0;
937	break;
938
939	case EIO_QUIT:
940	goto quit;
941
942	default:
943	req->result = -1;
944	break;
945	}
946
947	req->errorno = errno;
948		1082
949	X_LOCK (reslock);	1083	X_LOCK (reslock);
950		1084
951	++npending;	1085	++npending;
952		1086
953	if (!reqq_push (&res_queue, req) && want_poll_cb)	1087	if (!reqq_push (&res_queue, req) && want_poll_cb)
954	want_poll_cb ();	1088	want_poll_cb ();
955		1089
956	self->req = 0;	1090	self->req = 0;
957	worker_clear (self);	1091	etp_worker_clear (self);
958		1092
959	X_UNLOCK (reslock);	1093	X_UNLOCK (reslock);
960	}	1094	}
961		1095
962	quit:	1096	quit:
963	X_LOCK (wrklock);	1097	X_LOCK (wrklock);
964	worker_free (self);	1098	etp_worker_free (self);
965	X_UNLOCK (wrklock);	1099	X_UNLOCK (wrklock);
966		1100
967	return 0;	1101	return 0;
968	}	1102	}
969		1103
970	/*****************************************************************************/	1104	/*****************************************************************************/
971		1105
972	static void eio_atfork_prepare (void)
973	{
974	X_LOCK (wrklock);
975	X_LOCK (reqlock);
976	X_LOCK (reslock);
977	#if !HAVE_PREADWRITE
978	X_LOCK (preadwritelock);
979	#endif
980	#if !HAVE_READDIR_R
981	X_LOCK (readdirlock);
982	#endif
983	}
984
985	static void eio_atfork_parent (void)
986	{
987	#if !HAVE_READDIR_R
988	X_UNLOCK (readdirlock);
989	#endif
990	#if !HAVE_PREADWRITE
991	X_UNLOCK (preadwritelock);
992	#endif
993	X_UNLOCK (reslock);
994	X_UNLOCK (reqlock);
995	X_UNLOCK (wrklock);
996	}
997
998	static void eio_atfork_child (void)
999	{
1000	eio_req *prv;
1001
1002	while (prv = reqq_shift (&req_queue))
1003	eio_destroy (prv);
1004
1005	while (prv = reqq_shift (&res_queue))
1006	eio_destroy (prv);
1007
1008	while (wrk_first.next != &wrk_first)
1009	{
1010	worker *wrk = wrk_first.next;
1011
1012	if (wrk->req)
1013	eio_destroy (wrk->req);
1014
1015	worker_clear (wrk);
1016	worker_free (wrk);
1017	}
1018
1019	started = 0;
1020	idle = 0;
1021	nreqs = 0;
1022	nready = 0;
1023	npending = 0;
1024
1025	eio_atfork_parent ();
1026	}
1027
1028	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	1106	int eio_init (void (*want_poll)(void), void (*done_poll)(void))
1029	{	1107	{
1030	want_poll_cb = want_poll;	1108	return etp_init (want_poll, done_poll);
1031	done_poll_cb = done_poll;
1032
1033	#ifdef _WIN32
1034	X_MUTEX_CHECK (wrklock);
1035	X_MUTEX_CHECK (reslock);
1036	X_MUTEX_CHECK (reqlock);
1037	X_MUTEX_CHECK (reqwait);
1038	X_MUTEX_CHECK (preadwritelock);
1039	X_MUTEX_CHECK (readdirlock);
1040
1041	X_COND_CHECK (reqwait);
1042	#endif
1043
1044	X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);
1045	}	1109	}
1046		1110
1047	static void eio_api_destroy (eio_req *req)	1111	static void eio_api_destroy (eio_req *req)
1048	{	1112	{
1049	free (req);	1113	free (req);
…		…
1071	{ \	1135	{ \
1072	eio_api_destroy (req); \	1136	eio_api_destroy (req); \
1073	return 0; \	1137	return 0; \
1074	}	1138	}
1075		1139
		1140	static void eio_execute (etp_worker *self, eio_req *req)
		1141	{
		1142	errno = 0;
		1143
		1144	switch (req->type)
		1145	{
		1146	case EIO_READ: ALLOC (req->size);
		1147	req->result = req->offs >= 0
		1148	? pread (req->int1, req->ptr2, req->size, req->offs)
		1149	: read (req->int1, req->ptr2, req->size); break;
		1150	case EIO_WRITE: req->result = req->offs >= 0
		1151	? pwrite (req->int1, req->ptr2, req->size, req->offs)
		1152	: write (req->int1, req->ptr2, req->size); break;
		1153
		1154	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		1155	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break;
		1156
		1157	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1158	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1159	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1160	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1161	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1162	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1163
		1164	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		1165	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1166	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
		1167	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
		1168	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		1169	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
		1170
		1171	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
		1172	case EIO_CLOSE: req->result = close (req->int1); break;
		1173	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
		1174	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
		1175	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
		1176	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
		1177	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
		1178	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
		1179	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
		1180	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->int3); break;
		1181
		1182	case EIO_READLINK: ALLOC (NAME_MAX);
		1183	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
		1184
		1185	case EIO_SYNC: req->result = 0; sync (); break;
		1186	case EIO_FSYNC: req->result = fsync (req->int1); break;
		1187	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		1188	case EIO_MSYNC: req->result = msync (req->ptr2, req->size, req->int1); break;
		1189	case EIO_MTOUCH: req->result = eio__mtouch (req->ptr2, req->size, req->int1); break;
		1190
		1191	case EIO_READDIR: eio__scandir (req, self); break;
		1192
		1193	case EIO_BUSY:
		1194	#ifdef _WIN32
		1195	Sleep (req->nv1 * 1000.);
		1196	#else
		1197	{
		1198	struct timeval tv;
		1199
		1200	tv.tv_sec = req->nv1;
		1201	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
		1202
		1203	req->result = select (0, 0, 0, 0, &tv);
		1204	}
		1205	#endif
		1206	break;
		1207
		1208	case EIO_UTIME:
		1209	case EIO_FUTIME:
		1210	{
		1211	struct timeval tv[2];
		1212	struct timeval *times;
		1213
		1214	if (req->nv1 != -1. || req->nv2 != -1.)
		1215	{
		1216	tv[0].tv_sec = req->nv1;
		1217	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1218	tv[1].tv_sec = req->nv2;
		1219	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1220
		1221	times = tv;
		1222	}
		1223	else
		1224	times = 0;
		1225
		1226
		1227	req->result = req->type == EIO_FUTIME
		1228	? futimes (req->int1, times)
		1229	: utimes (req->ptr1, times);
		1230	}
		1231	break;
		1232
		1233	case EIO_GROUP:
		1234	abort (); /* handled in eio_request */
		1235
		1236	case EIO_NOP:
		1237	req->result = 0;
		1238	break;
		1239
		1240	case EIO_CUSTOM:
		1241	((void (*)(eio_req *))req->feed) (req);
		1242	break;
		1243
		1244	default:
		1245	req->result = -1;
		1246	break;
		1247	}
		1248
		1249	req->errorno = errno;
		1250	}
		1251
		1252	#ifndef EIO_NO_WRAPPERS
		1253
1076	eio_req *eio_nop (int pri, eio_cb cb, void *data)	1254	eio_req *eio_nop (int pri, eio_cb cb, void *data)
1077	{	1255	{
1078	REQ (EIO_NOP); SEND;	1256	REQ (EIO_NOP); SEND;
1079	}	1257	}
1080		1258
…		…
1089	}	1267	}
1090		1268
1091	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)	1269	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
1092	{	1270	{
1093	REQ (EIO_FSYNC); req->int1 = fd; SEND;	1271	REQ (EIO_FSYNC); req->int1 = fd; SEND;
		1272	}
		1273
		1274	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		1275	{
		1276	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		1277	}
		1278
		1279	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		1280	{
		1281	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
1094	}	1282	}
1095		1283
1096	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)	1284	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1097	{	1285	{
1098	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;	1286	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
…		…
1219	return eio__1path (EIO_READDIR, path, pri, cb, data);	1407	return eio__1path (EIO_READDIR, path, pri, cb, data);
1220	}	1408	}
1221		1409
1222	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)	1410	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
1223	{	1411	{
1224	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int2 = (long)dev; SEND;	1412	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int3 = (long)dev; SEND;
1225	}	1413	}
1226		1414
1227	static eio_req *	1415	static eio_req *
1228	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)	1416	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1229	{	1417	{
…		…
1253	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)	1441	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1254	{	1442	{
1255	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);	1443	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
1256	}	1444	}
1257		1445
		1446	eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data)
		1447	{
		1448	REQ (EIO_CUSTOM); req->feed = (void (*)(eio_req *))execute; SEND;
		1449	}
		1450
		1451	#endif
		1452
1258	eio_req *eio_grp (eio_cb cb, void *data)	1453	eio_req *eio_grp (eio_cb cb, void *data)
1259	{	1454	{
1260	const int pri = EIO_PRI_MAX;	1455	const int pri = EIO_PRI_MAX;
1261		1456
1262	REQ (EIO_GROUP); SEND;	1457	REQ (EIO_GROUP); SEND;
…		…
1303	/*****************************************************************************/	1498	/*****************************************************************************/
1304	/* misc garbage */	1499	/* misc garbage */
1305		1500
1306	ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)	1501	ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
1307	{	1502	{
1308	worker wrk;	1503	etp_worker wrk;
1309		1504
1310	wrk.dbuf = 0;	1505	wrk.dbuf = 0;
1311		1506
1312	eio__sendfile (ofd, ifd, offset, count, &wrk);	1507	eio__sendfile (ofd, ifd, offset, count, &wrk);
1313		1508

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