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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 1.24 by root, Tue Sep 30 13:17:32 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>
…		…
8	#include <errno.h>	47	#include <errno.h>
9	#include <sys/types.h>	48	#include <sys/types.h>
10	#include <sys/stat.h>	49	#include <sys/stat.h>
11	#include <limits.h>	50	#include <limits.h>
12	#include <fcntl.h>	51	#include <fcntl.h>
13	#include <sched.h>	52	#include <assert.h>
14		53
15	#ifndef EIO_FINISH	54	#ifndef EIO_FINISH
16	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0	55	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
17	#endif	56	#endif
18		57
…		…
41	# ifndef EIO_STRUCT_DIRENT	80	# ifndef EIO_STRUCT_DIRENT
42	# define EIO_STRUCT_DIRENT struct dirent	81	# define EIO_STRUCT_DIRENT struct dirent
43	# endif	82	# endif
44		83
45	#endif	84	#endif
46
47	# ifndef EIO_STRUCT_STAT
48	# define EIO_STRUCT_STAT struct stat
49	# endif
50		85
51	#if HAVE_SENDFILE	86	#if HAVE_SENDFILE
52	# if __linux	87	# if __linux
53	# include <sys/sendfile.h>	88	# include <sys/sendfile.h>
54	# elif __freebsd	89	# elif __freebsd
…		…
74	/* buffer size for various temporary buffers */	109	/* buffer size for various temporary buffers */
75	#define EIO_BUFSIZE 65536	110	#define EIO_BUFSIZE 65536
76		111
77	#define dBUF \	112	#define dBUF \
78	char *eio_buf; \	113	char *eio_buf; \
79	X_LOCK (wrklock); \	114	ETP_WORKER_LOCK (self); \
80	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	115	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \
81	X_UNLOCK (wrklock); \	116	ETP_WORKER_UNLOCK (self); \
		117	errno = ENOMEM; \
82	if (!eio_buf) \	118	if (!eio_buf) \
83	return -1;	119	return -1;
84		120
85	#define EIO_TICKS ((1000000 + 1023) >> 10)	121	#define EIO_TICKS ((1000000 + 1023) >> 10)
86		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
87	static void (*want_poll_cb) (void);	177	static void (*want_poll_cb) (void);
88	static void (*done_poll_cb) (void);	178	static void (*done_poll_cb) (void);
89		179
90	static unsigned int max_poll_time = 0;	180	static unsigned int max_poll_time; /* reslock */
91	static unsigned int max_poll_reqs = 0;	181	static unsigned int max_poll_reqs; /* reslock */
92		182
93	/* calculcate time difference in ~1/EIO_TICKS of a second */	183	static volatile unsigned int nreqs; /* reqlock */
94	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	184	static volatile unsigned int nready; /* reqlock */
95	{	185	static volatile unsigned int npending; /* reqlock */
96	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	186	static volatile unsigned int max_idle = 4;
97	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
98	}
99		187
100	static unsigned int started, idle, wanted;
101
102	/* worker threads management */
103	static mutex_t wrklock = X_MUTEX_INIT;	188	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;	189	static mutex_t reslock = X_MUTEX_INIT;
146	static mutex_t reqlock = X_MUTEX_INIT;	190	static mutex_t reqlock = X_MUTEX_INIT;
147	static cond_t reqwait = X_COND_INIT;	191	static cond_t reqwait = X_COND_INIT;
148		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
149	unsigned int eio_nreqs (void)	235	static unsigned int etp_nreqs (void)
150	{	236	{
		237	int retval;
		238	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		239	retval = nreqs;
		240	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
151	return nreqs;	241	return retval;
152	}	242	}
153		243
154	unsigned int eio_nready (void)	244	static unsigned int etp_nready (void)
155	{	245	{
156	unsigned int retval;	246	unsigned int retval;
157		247
158	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	248	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
159	retval = nready;	249	retval = nready;
160	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	250	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
161		251
162	return retval;	252	return retval;
163	}	253	}
164		254
165	unsigned int eio_npending (void)	255	static unsigned int etp_npending (void)
166	{	256	{
167	unsigned int retval;	257	unsigned int retval;
168		258
169	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	259	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
170	retval = npending;	260	retval = npending;
171	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	261	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
172		262
173	return retval;	263	return retval;
174	}	264	}
175		265
176	unsigned int eio_nthreads (void)	266	static unsigned int etp_nthreads (void)
177	{	267	{
178	unsigned int retval;	268	unsigned int retval;
179		269
180	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	270	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
181	retval = started;	271	retval = started;
…		…
188	* a somewhat faster data structure might be nice, but	278	* a somewhat faster data structure might be nice, but
189	* with 8 priorities this actually needs <20 insns	279	* with 8 priorities this actually needs <20 insns
190	* per shift, the most expensive operation.	280	* per shift, the most expensive operation.
191	*/	281	*/
192	typedef struct {	282	typedef struct {
193	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 */
194	int size;	284	int size;
195	} reqq;	285	} etp_reqq;
196		286
197	static reqq req_queue;	287	static etp_reqq req_queue;
198	static reqq res_queue;	288	static etp_reqq res_queue;
199		289
200	static int reqq_push (reqq *q, eio_req *req)	290	static int reqq_push (etp_reqq *q, ETP_REQ *req)
201	{	291	{
202	int pri = req->pri;	292	int pri = req->pri;
203	req->next = 0;	293	req->next = 0;
204		294
205	if (q->qe[pri])	295	if (q->qe[pri])
…		…
211	q->qe[pri] = q->qs[pri] = req;	301	q->qe[pri] = q->qs[pri] = req;
212		302
213	return q->size++;	303	return q->size++;
214	}	304	}
215		305
216	static eio_req *reqq_shift (reqq *q)	306	static ETP_REQ *reqq_shift (etp_reqq *q)
217	{	307	{
218	int pri;	308	int pri;
219		309
220	if (!q->size)	310	if (!q->size)
221	return 0;	311	return 0;
222		312
223	--q->size;	313	--q->size;
224		314
225	for (pri = EIO_NUM_PRI; pri--; )	315	for (pri = ETP_NUM_PRI; pri--; )
226	{	316	{
227	eio_req *req = q->qs[pri];	317	eio_req *req = q->qs[pri];
228		318
229	if (req)	319	if (req)
230	{	320	{
…		…
235	}	325	}
236	}	326	}
237		327
238	abort ();	328	abort ();
239	}	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	/*****************************************************************************/
240		604
241	static void grp_try_feed (eio_req *grp)	605	static void grp_try_feed (eio_req *grp)
242	{	606	{
243	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	607	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
244	{	608	{
…		…
253	break;	617	break;
254	}	618	}
255	}	619	}
256	}	620	}
257		621
258	static int eio_finish (eio_req *req);
259
260	static int grp_dec (eio_req *grp)	622	static int grp_dec (eio_req *grp)
261	{	623	{
262	--grp->size;	624	--grp->size;
263		625
264	/* call feeder, if applicable */	626	/* call feeder, if applicable */
…		…
312	eio_cancel (grp);	674	eio_cancel (grp);
313	}	675	}
314		676
315	void eio_cancel (eio_req *req)	677	void eio_cancel (eio_req *req)
316	{	678	{
317	X_LOCK (wrklock);
318	req->flags |= EIO_FLAG_CANCELLED;
319	X_UNLOCK (wrklock);
320
321	eio_grp_cancel (req);	679	etp_cancel (req);
322	}
323
324	X_THREAD_PROC (eio_proc);
325
326	static void start_thread (void)
327	{
328	worker *wrk = calloc (1, sizeof (worker));
329
330	if (!wrk)
331	croak ("unable to allocate worker thread data");
332
333	X_LOCK (wrklock);
334
335	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))
336	{
337	wrk->prev = &wrk_first;
338	wrk->next = wrk_first.next;
339	wrk_first.next->prev = wrk;
340	wrk_first.next = wrk;
341	++started;
342	}
343	else
344	free (wrk);
345
346	X_UNLOCK (wrklock);
347	}
348
349	static void maybe_start_thread (void)
350	{
351	if (eio_nthreads () >= wanted)
352	return;
353
354	/* todo: maybe use idle here, but might be less exact */
355	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())
356	return;
357
358	start_thread ();
359	}	680	}
360		681
361	void eio_submit (eio_req *req)	682	void eio_submit (eio_req *req)
362	{	683	{
363	++nreqs;	684	etp_submit (req);
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	}	685	}
373		686
374	static void end_thread (void)	687	unsigned int eio_nreqs (void)
375	{	688	{
376	eio_req *req = calloc (1, sizeof (eio_req));	689	return etp_nreqs ();
		690	}
377		691
378	req->type = EIO_QUIT;	692	unsigned int eio_nready (void)
379	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	693	{
		694	return etp_nready ();
		695	}
380		696
381	X_LOCK (reqlock);	697	unsigned int eio_npending (void)
382	reqq_push (&req_queue, req);	698	{
383	X_COND_SIGNAL (reqwait);	699	return etp_npending ();
384	X_UNLOCK (reqlock);	700	}
385		701
386	X_LOCK (wrklock);	702	unsigned int eio_nthreads (void)
387	--started;	703	{
388	X_UNLOCK (wrklock);	704	return etp_nthreads ();
389	}	705	}
390		706
391	void eio_set_max_poll_time (double nseconds)	707	void eio_set_max_poll_time (double nseconds)
392	{	708	{
393	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
394	max_poll_time = nseconds;	709	etp_set_max_poll_time (nseconds);
395	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
396	}	710	}
397		711
398	void eio_set_max_poll_reqs (unsigned int maxreqs)	712	void eio_set_max_poll_reqs (unsigned int maxreqs)
399	{	713	{
400	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
401	max_poll_reqs = maxreqs;	714	etp_set_max_poll_reqs (maxreqs);
402	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
403	}	715	}
404		716
405	void eio_set_max_idle (unsigned int nthreads)	717	void eio_set_max_idle (unsigned int nthreads)
406	{	718	{
407	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	719	etp_set_max_idle (nthreads);
408	max_idle = nthreads <= 0 ? 1 : nthreads;
409	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
410	}	720	}
411		721
412	void eio_set_min_parallel (unsigned int nthreads)	722	void eio_set_min_parallel (unsigned int nthreads)
413	{	723	{
414	if (wanted < nthreads)	724	etp_set_min_parallel (nthreads);
415	wanted = nthreads;
416	}	725	}
417		726
418	void eio_set_max_parallel (unsigned int nthreads)	727	void eio_set_max_parallel (unsigned int nthreads)
419	{	728	{
420	if (wanted > nthreads)	729	etp_set_max_parallel (nthreads);
421	wanted = nthreads;
422
423	while (started > wanted)
424	end_thread ();
425	}	730	}
426		731
427	int eio_poll (void)	732	int eio_poll (void)
428	{	733	{
429	int maxreqs = max_poll_reqs;	734	return etp_poll ();
430	struct timeval tv_start, tv_now;
431	eio_req *req;
432
433	if (max_poll_time)
434	gettimeofday (&tv_start, 0);
435
436	for (;;)
437	{
438	maybe_start_thread ();
439
440	X_LOCK (reslock);
441	req = reqq_shift (&res_queue);
442
443	if (req)
444	{
445	--npending;
446
447	if (!res_queue.size && done_poll_cb)
448	done_poll_cb ();
449	}
450
451	X_UNLOCK (reslock);
452
453	if (!req)
454	return 0;
455
456	--nreqs;
457
458	if (req->type == EIO_GROUP && req->size)
459	{
460	req->int1 = 1; /* mark request as delayed */
461	continue;
462	}
463	else
464	{
465	int res = eio_finish (req);
466	if (res)
467	return res;
468	}
469
470	if (maxreqs && !--maxreqs)
471	break;
472
473	if (max_poll_time)
474	{
475	gettimeofday (&tv_now, 0);
476
477	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
478	break;
479	}
480	}
481
482	errno = EAGAIN;
483	return -1;
484	}	735	}
485		736
486	/*****************************************************************************/	737	/*****************************************************************************/
487	/* work around various missing functions */	738	/* work around various missing functions */
488		739
489	#if !HAVE_PREADWRITE	740	#if !HAVE_PREADWRITE
490	# define pread aio_pread	741	# define pread eio__pread
491	# define pwrite aio_pwrite	742	# define pwrite eio__pwrite
492		743
493	/*	744	static ssize_t
494	* make our pread/pwrite safe against themselves, but not against	745	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	{	746	{
502	ssize_t res;	747	ssize_t res;
503	off_t ooffset;	748	off_t ooffset;
504		749
505	X_LOCK (preadwritelock);	750	X_LOCK (preadwritelock);
…		…
510	X_UNLOCK (preadwritelock);	755	X_UNLOCK (preadwritelock);
511		756
512	return res;	757	return res;
513	}	758	}
514		759
515	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	760	static ssize_t
		761	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
516	{	762	{
517	ssize_t res;	763	ssize_t res;
518	off_t ooffset;	764	off_t ooffset;
519		765
520	X_LOCK (preadwritelock);	766	X_LOCK (preadwritelock);
…		…
528	}	774	}
529	#endif	775	#endif
530		776
531	#ifndef HAVE_FUTIMES	777	#ifndef HAVE_FUTIMES
532		778
533	# define utimes(path,times) aio_utimes (path, times)	779	# define utimes(path,times) eio__utimes (path, times)
534	# define futimes(fd,times) aio_futimes (fd, times)	780	# define futimes(fd,times) eio__futimes (fd, times)
535		781
		782	static int
536	static int aio_utimes (const char *filename, const struct timeval times[2])	783	eio__utimes (const char *filename, const struct timeval times[2])
537	{	784	{
538	if (times)	785	if (times)
539	{	786	{
540	struct utimbuf buf;	787	struct utimbuf buf;
541		788
…		…
546	}	793	}
547	else	794	else
548	return utime (filename, 0);	795	return utime (filename, 0);
549	}	796	}
550		797
551	static int aio_futimes (int fd, const struct timeval tv[2])	798	static int eio__futimes (int fd, const struct timeval tv[2])
552	{	799	{
553	errno = ENOSYS;	800	errno = ENOSYS;
554	return -1;	801	return -1;
555	}	802	}
556		803
…		…
559	#if !HAVE_FDATASYNC	806	#if !HAVE_FDATASYNC
560	# define fdatasync fsync	807	# define fdatasync fsync
561	#endif	808	#endif
562		809
563	#if !HAVE_READAHEAD	810	#if !HAVE_READAHEAD
564	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	811	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
565		812
		813	static ssize_t
566	static ssize_t aio_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)
567	{	815	{
568	size_t todo = count;	816	size_t todo = count;
569	dBUF;	817	dBUF;
570		818
571	while (todo > 0)	819	while (todo > 0)
…		…
581	return count;	829	return count;
582	}	830	}
583		831
584	#endif	832	#endif
585		833
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 */	834	/* sendfile always needs emulation */
		835	static ssize_t
617	static ssize_t 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)
618	{	837	{
619	ssize_t res;	838	ssize_t res;
620		839
621	if (!count)	840	if (!count)
622	return 0;	841	return 0;
…		…
705		924
706	return res;	925	return res;
707	}	926	}
708		927
709	/* read a full directory */	928	/* read a full directory */
		929	static void
710	static void scandir_ (eio_req *req, worker *self)	930	eio__scandir (eio_req *req, etp_worker *self)
711	{	931	{
712	DIR *dirp;	932	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;	933	EIO_STRUCT_DIRENT *entp;
719	char *name, *names;	934	char *name, *names;
720	int memlen = 4096;	935	int memlen = 4096;
721	int memofs = 0;	936	int memofs = 0;
722	int res = 0;	937	int res = 0;
723		938
724	X_LOCK (wrklock);	939	X_LOCK (wrklock);
		940	/* the corresponding closedir is in ETP_WORKER_CLEAR */
725	self->dirp = dirp = opendir (req->ptr1);	941	self->dirp = dirp = opendir (req->ptr1);
726	self->dbuf = u = malloc (sizeof (*u));
727	req->flags |= EIO_FLAG_PTR2_FREE;	942	req->flags |= EIO_FLAG_PTR2_FREE;
728	req->ptr2 = names = malloc (memlen);	943	req->ptr2 = names = malloc (memlen);
729	X_UNLOCK (wrklock);	944	X_UNLOCK (wrklock);
730		945
731	if (dirp && u && names)	946	if (dirp && names)
732	for (;;)	947	for (;;)
733	{	948	{
734	errno = 0;	949	errno = 0;
735	readdir_r (dirp, &u->d, &entp);	950	entp = readdir (dirp);
736		951
737	if (!entp)	952	if (!entp)
738	break;	953	break;
739		954
740	name = entp->d_name;	955	name = entp->d_name;
…		…
765	res = -1;	980	res = -1;
766		981
767	req->result = res;	982	req->result = res;
768	}	983	}
769		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;
		1012	}
		1013
770	/*****************************************************************************/	1014	/*****************************************************************************/
771		1015
772	#define ALLOC(len) \	1016	#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) \	1017	if (!req->ptr2) \
778	{ \	1018	{ \
		1019	X_LOCK (wrklock); \
		1020	req->flags |= EIO_FLAG_PTR2_FREE; \
		1021	X_UNLOCK (wrklock); \
		1022	req->ptr2 = malloc (len); \
		1023	if (!req->ptr2) \
		1024	{ \
779	errno = ENOMEM; \	1025	errno = ENOMEM; \
780	req->result = -1; \	1026	req->result = -1; \
781	break; \	1027	break; \
		1028	} \
782	}	1029	}
783		1030
784	X_THREAD_PROC (eio_proc)	1031	X_THREAD_PROC (etp_proc)
785	{	1032	{
786	eio_req *req;	1033	ETP_REQ *req;
787	struct timespec ts;	1034	struct timespec ts;
788	worker *self = (worker *)thr_arg;	1035	etp_worker *self = (etp_worker *)thr_arg;
789		1036
790	/* try to distribute timeouts somewhat randomly */	1037	/* try to distribute timeouts somewhat randomly */
791	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1038	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
792		1039
793	for (;;)	1040	for (;;)
794	{	1041	{
795	ts.tv_sec = time (0) + IDLE_TIMEOUT;
796
797	X_LOCK (reqlock);	1042	X_LOCK (reqlock);
798		1043
799	for (;;)	1044	for (;;)
800	{	1045	{
801	self->req = req = reqq_shift (&req_queue);	1046	self->req = req = reqq_shift (&req_queue);
…		…
803	if (req)	1048	if (req)
804	break;	1049	break;
805		1050
806	++idle;	1051	++idle;
807		1052
		1053	ts.tv_sec = time (0) + IDLE_TIMEOUT;
808	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1054	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
809	{	1055	{
810	if (idle > max_idle)	1056	if (idle > max_idle)
811	{	1057	{
812	--idle;	1058	--idle;
…		…
817	goto quit;	1063	goto quit;
818	}	1064	}
819		1065
820	/* we are allowed to idle, so do so without any timeout */	1066	/* we are allowed to idle, so do so without any timeout */
821	X_COND_WAIT (reqwait, reqlock);	1067	X_COND_WAIT (reqwait, reqlock);
822	ts.tv_sec = time (0) + IDLE_TIMEOUT;
823	}	1068	}
824		1069
825	--idle;	1070	--idle;
826	}	1071	}
827		1072
828	--nready;	1073	--nready;
829		1074
830	X_UNLOCK (reqlock);	1075	X_UNLOCK (reqlock);
831		1076
832	errno = 0; /* strictly unnecessary */	1077	if (req->type < 0)
		1078	goto quit;
833		1079
834	if (!EIO_CANCELLED (req))	1080	if (!EIO_CANCELLED (req))
835	switch (req->type)	1081	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		1082
933	X_LOCK (reslock);	1083	X_LOCK (reslock);
934		1084
935	++npending;	1085	++npending;
936		1086
937	if (!reqq_push (&res_queue, req) && want_poll_cb)	1087	if (!reqq_push (&res_queue, req) && want_poll_cb)
938	want_poll_cb ();	1088	want_poll_cb ();
939		1089
940	self->req = 0;	1090	self->req = 0;
941	worker_clear (self);	1091	etp_worker_clear (self);
942		1092
943	X_UNLOCK (reslock);	1093	X_UNLOCK (reslock);
944	}	1094	}
945		1095
946	quit:	1096	quit:
947	X_LOCK (wrklock);	1097	X_LOCK (wrklock);
948	worker_free (self);	1098	etp_worker_free (self);
949	X_UNLOCK (wrklock);	1099	X_UNLOCK (wrklock);
950		1100
951	return 0;	1101	return 0;
952	}	1102	}
953		1103
954	/*****************************************************************************/	1104	/*****************************************************************************/
955		1105
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))	1106	int eio_init (void (*want_poll)(void), void (*done_poll)(void))
1013	{	1107	{
1014	want_poll_cb = want_poll;	1108	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	}	1109	}
1030		1110
1031	static void eio_api_destroy (eio_req *req)	1111	static void eio_api_destroy (eio_req *req)
1032	{	1112	{
1033	free (req);	1113	free (req);
…		…
1038	\	1118	\
1039	req = (eio_req *)calloc (1, sizeof *req); \	1119	req = (eio_req *)calloc (1, sizeof *req); \
1040	if (!req) \	1120	if (!req) \
1041	return 0; \	1121	return 0; \
1042	\	1122	\
1043	req->type = EIO_ ## rtype; \	1123	req->type = rtype; \
1044	req->pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \	1124	req->pri = pri; \
1045	req->finish = cb; \	1125	req->finish = cb; \
		1126	req->data = data; \
1046	req->destroy = eio_api_destroy;	1127	req->destroy = eio_api_destroy;
1047		1128
1048	#define SEND eio_submit (req); return req	1129	#define SEND eio_submit (req); return req
1049		1130
1050	#define PATH (void)0	1131	#define PATH \
		1132	req->flags |= EIO_FLAG_PTR1_FREE; \
		1133	req->ptr1 = strdup (path); \
		1134	if (!req->ptr1) \
		1135	{ \
		1136	eio_api_destroy (req); \
		1137	return 0; \
		1138	}
1051		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
		1232	case EIO_GROUP:
		1233	abort (); /* handled in eio_request */
		1234
		1235	case EIO_NOP:
		1236	req->result = 0;
		1237	break;
		1238
		1239	case EIO_CUSTOM:
		1240	((void (*)(eio_req *))req->feed) (req);
		1241	break;
		1242
		1243	default:
		1244	req->result = -1;
		1245	break;
		1246	}
		1247
		1248	req->errorno = errno;
		1249	}
		1250
		1251	#ifndef EIO_NO_WRAPPERS
		1252
		1253	eio_req *eio_nop (int pri, eio_cb cb, void *data)
		1254	{
		1255	REQ (EIO_NOP); SEND;
		1256	}
		1257
		1258	eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
		1259	{
		1260	REQ (EIO_BUSY); req->nv1 = delay; SEND;
		1261	}
		1262
1052	eio_req *eio_fsync (int fd, eio_cb cb)	1263	eio_req *eio_sync (int pri, eio_cb cb, void *data)
1053	{	1264	{
		1265	REQ (EIO_SYNC); SEND;
		1266	}
		1267
		1268	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
		1269	{
1054	REQ (FSYNC); req->int1 = fd; SEND;	1270	REQ (EIO_FSYNC); req->int1 = fd; SEND;
1055	}	1271	}
1056		1272
		1273	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		1274	{
		1275	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		1276	}
		1277
		1278	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		1279	{
		1280	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		1281	}
		1282
1057	eio_req *eio_fdatasync (int fd, eio_cb cb)	1283	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1058	{	1284	{
1059	REQ (FDATASYNC); req->int1 = fd; SEND;	1285	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
1060	}	1286	}
1061		1287
		1288	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
		1289	{
		1290	REQ (EIO_CLOSE); req->int1 = fd; SEND;
		1291	}
		1292
1062	eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb)	1293	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
1063	{	1294	{
1064	REQ (READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;	1295	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
1065	}	1296	}
1066		1297
1067	eio_req *eio_read (int fd, off_t offset, size_t length, void *data, eio_cb cb)	1298	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
1068	{	1299	{
1069	REQ (READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND;	1300	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1070	}	1301	}
1071		1302
1072	eio_req *eio_write (int fd, off_t offset, size_t length, void *data, eio_cb cb)	1303	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
1073	{	1304	{
1074	REQ (WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND;	1305	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1075	}	1306	}
1076		1307
1077	eio_req *eio_fstat (int fd, eio_cb cb)	1308	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
1078	{	1309	{
1079	REQ (FSTAT); req->int1 = fd; SEND;	1310	REQ (EIO_FSTAT); req->int1 = fd; SEND;
1080	}	1311	}
1081		1312
1082	eio_req *eio_futime (int fd, double atime, double mtime, eio_cb cb)	1313	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
1083	{	1314	{
1084	REQ (FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;	1315	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
1085	}	1316	}
1086		1317
1087	eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb)	1318	eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
1088	{	1319	{
1089	REQ (FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;	1320	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
1090	}	1321	}
1091		1322
1092	eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb)	1323	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
1093	{	1324	{
1094	REQ (FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;	1325	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
1095	}	1326	}
1096		1327
1097	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb)	1328	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
1098	{	1329	{
1099	REQ (FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	1330	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1100	}	1331	}
1101		1332
1102	eio_req *eio_dup2 (int fd, int fd2, eio_cb cb)	1333	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
1103	{	1334	{
1104	REQ (DUP2); req->int1 = fd; req->int2 = fd2; SEND;	1335	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
1105	}	1336	}
1106		1337
1107	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb)	1338	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	{	1339	{
1109	REQ (SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;	1340	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
1110	}	1341	}
1111		1342
1112	eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb)	1343	eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
1113	{	1344	{
1114	REQ (OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;	1345	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
1115	}	1346	}
1116		1347
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)	1348	eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
1133	{	1349	{
1134	REQ (UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;	1350	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
1135	}	1351	}
1136		1352
1137	eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb)	1353	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
1138	{	1354	{
1139	REQ (TRUNCATE); PATH; req->offs = offset; SEND;	1355	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
1140	}	1356	}
1141		1357
1142	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb)	1358	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
1143	{	1359	{
1144	REQ (CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	1360	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1145	}	1361	}
1146		1362
1147	eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb)	1363	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1148	{	1364	{
1149	REQ (CHMOD); PATH; req->int2 = (long)mode; SEND;	1365	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
1150	}	1366	}
1151		1367
1152	eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb)	1368	eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1153	{	1369	{
1154	REQ (MKDIR); PATH; req->int2 = (long)mode; SEND;	1370	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
1155	}	1371	}
1156		1372
1157	eio_req *eio_unlink (const char *path, eio_cb cb)	1373	static eio_req *
		1374	eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
1158	{	1375	{
1159	REQ (UNLINK); PATH; SEND;
1160	}
1161
1162	eio_req *eio_rmdir (const char *path, eio_cb cb)
1163	{
1164	REQ (RMDIR); PATH; SEND;	1376	REQ (type); PATH; SEND;
1165	}	1377	}
1166		1378
		1379	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
		1380	{
		1381	return eio__1path (EIO_READLINK, path, pri, cb, data);
		1382	}
		1383
		1384	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
		1385	{
		1386	return eio__1path (EIO_STAT, path, pri, cb, data);
		1387	}
		1388
		1389	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
		1390	{
		1391	return eio__1path (EIO_LSTAT, path, pri, cb, data);
		1392	}
		1393
		1394	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
		1395	{
		1396	return eio__1path (EIO_UNLINK, path, pri, cb, data);
		1397	}
		1398
		1399	eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
		1400	{
		1401	return eio__1path (EIO_RMDIR, path, pri, cb, data);
		1402	}
		1403
1167	eio_req *eio_readdir (const char *path, eio_cb cb)	1404	eio_req *eio_readdir (const char *path, int pri, eio_cb cb, void *data)
1168	{	1405	{
1169	REQ (READDIR); PATH; SEND;	1406	return eio__1path (EIO_READDIR, path, pri, cb, data);
1170	}	1407	}
1171		1408
1172	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb)	1409	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
1173	{	1410	{
1174	REQ (MKNOD); PATH; req->int2 = (long)mode; req->int2 = (long)dev; SEND;	1411	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int3 = (long)dev; SEND;
1175	}	1412	}
1176		1413
1177	eio_req *eio_busy (double delay, eio_cb cb)	1414	static eio_req *
		1415	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1178	{	1416	{
1179	REQ (BUSY); req->nv1 = delay; SEND;	1417	REQ (type); PATH;
1180	}
1181		1418
		1419	req->flags |= EIO_FLAG_PTR2_FREE;
		1420	req->ptr2 = strdup (new_path);
		1421	if (!req->ptr2)
		1422	{
		1423	eio_api_destroy (req);
		1424	return 0;
		1425	}
		1426
		1427	SEND;
		1428	}
		1429
		1430	eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1431	{
		1432	return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
		1433	}
		1434
		1435	eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1436	{
		1437	return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
		1438	}
		1439
		1440	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1441	{
		1442	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
		1443	}
		1444
		1445	eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data)
		1446	{
		1447	REQ (EIO_CUSTOM); req->feed = (void (*)(eio_req *))execute; SEND;
		1448	}
		1449
		1450	#endif
		1451
1182	eio_req *eio_nop (eio_cb cb)	1452	eio_req *eio_grp (eio_cb cb, void *data)
1183	{	1453	{
		1454	const int pri = EIO_PRI_MAX;
		1455
1184	REQ (NOP); SEND;	1456	REQ (EIO_GROUP); SEND;
1185	}	1457	}
1186		1458
1187	#undef REQ	1459	#undef REQ
1188	#undef PATH	1460	#undef PATH
1189	#undef SEND	1461	#undef SEND
1190		1462
1191	#if 0	1463	/*****************************************************************************/
1192		1464	/* 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		1465
1566	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)	1466	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1567	{	1467	{
1568	grp->int2 = limit;	1468	grp->int2 = limit;
1569	grp->feed = feed;	1469	grp->feed = feed;
…		…
1592	grp->grp_first->grp_prev = req;	1492	grp->grp_first->grp_prev = req;
1593		1493
1594	grp->grp_first = req;	1494	grp->grp_first = req;
1595	}	1495	}
1596		1496
		1497	/*****************************************************************************/
		1498	/* misc garbage */
1597		1499
		1500	ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
		1501	{
		1502	etp_worker wrk;
		1503
		1504	wrk.dbuf = 0;
		1505
		1506	eio__sendfile (ofd, ifd, offset, count, &wrk);
		1507
		1508	if (wrk.dbuf)
		1509	free (wrk.dbuf);
		1510	}
		1511

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