[ViewVC] Diff of: cvs/libeio/eio.c

Comparing libeio/eio.c (file contents):
Revision 1.8 by root, Sun May 11 20:08:37 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>
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	/TODO/
331	assert (("unable to allocate worker thread data", !wrk));
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;
…		…
763		978
764	if (errno)	979	if (errno)
765	res = -1;	980	res = -1;
766		981
767	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;
768	}	1012	}
769		1013
770	/*****************************************************************************/	1014	/*****************************************************************************/
771		1015
772	#define ALLOC(len) \	1016	#define ALLOC(len) \
…		…
782	req->result = -1; \	1026	req->result = -1; \
783	break; \	1027	break; \
784	} \	1028	} \
785	}	1029	}
786		1030
787	X_THREAD_PROC (eio_proc)	1031	X_THREAD_PROC (etp_proc)
788	{	1032	{
789	eio_req *req;	1033	ETP_REQ *req;
790	struct timespec ts;	1034	struct timespec ts;
791	worker self = (worker )thr_arg;	1035	etp_worker self = (etp_worker )thr_arg;
792		1036
793	/* try to distribute timeouts somewhat randomly */	1037	/* try to distribute timeouts somewhat randomly */
794	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1038	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
795		1039
796	for (;;)	1040	for (;;)
797	{	1041	{
798	ts.tv_sec = time (0) + IDLE_TIMEOUT;
799
800	X_LOCK (reqlock);	1042	X_LOCK (reqlock);
801		1043
802	for (;;)	1044	for (;;)
803	{	1045	{
804	self->req = req = reqq_shift (&req_queue);	1046	self->req = req = reqq_shift (&req_queue);
…		…
806	if (req)	1048	if (req)
807	break;	1049	break;
808		1050
809	++idle;	1051	++idle;
810		1052
		1053	ts.tv_sec = time (0) + IDLE_TIMEOUT;
811	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1054	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
812	{	1055	{
813	if (idle > max_idle)	1056	if (idle > max_idle)
814	{	1057	{
815	--idle;	1058	--idle;
…		…
820	goto quit;	1063	goto quit;
821	}	1064	}
822		1065
823	/* we are allowed to idle, so do so without any timeout */	1066	/* we are allowed to idle, so do so without any timeout */
824	X_COND_WAIT (reqwait, reqlock);	1067	X_COND_WAIT (reqwait, reqlock);
825	ts.tv_sec = time (0) + IDLE_TIMEOUT;
826	}	1068	}
827		1069
828	--idle;	1070	--idle;
829	}	1071	}
830		1072
831	--nready;	1073	--nready;
832		1074
833	X_UNLOCK (reqlock);	1075	X_UNLOCK (reqlock);
834		1076
835	errno = 0; /* strictly unnecessary */	1077	if (req->type < 0)
		1078	goto quit;
836		1079
837	if (!EIO_CANCELLED (req))	1080	if (!EIO_CANCELLED (req))
838	switch (req->type)	1081	ETP_EXECUTE (self, req);
839	{
840	case EIO_READ: ALLOC (req->size);
841	req->result = req->offs >= 0
842	? pread (req->int1, req->ptr2, req->size, req->offs)
843	: read (req->int1, req->ptr2, req->size); break;
844	case EIO_WRITE: req->result = req->offs >= 0
845	? pwrite (req->int1, req->ptr2, req->size, req->offs)
846	: write (req->int1, req->ptr2, req->size); break;
847
848	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
849	case EIO_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
850
851	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
852	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
853	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
854	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
855	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
856	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
857
858	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
859	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
860	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
861	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
862	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
863	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
864
865	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
866	case EIO_CLOSE: req->result = close (req->int1); break;
867	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
868	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
869	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
870	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
871	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
872	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
873	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
874	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
875
876	case EIO_READLINK: ALLOC (NAME_MAX);
877	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
878
879	case EIO_SYNC: req->result = 0; sync (); break;
880	case EIO_FSYNC: req->result = fsync (req->int1); break;
881	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
882
883	case EIO_READDIR: scandir_ (req, self); break;
884
885	case EIO_BUSY:
886	#ifdef _WIN32
887	Sleep (req->nv1 * 1000.);
888	#else
889	{
890	struct timeval tv;
891
892	tv.tv_sec = req->nv1;
893	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
894
895	req->result = select (0, 0, 0, 0, &tv);
896	}
897	#endif
898	break;
899
900	case EIO_UTIME:
901	case EIO_FUTIME:
902	{
903	struct timeval tv[2];
904	struct timeval *times;
905
906	if (req->nv1 != -1. \|\| req->nv2 != -1.)
907	{
908	tv[0].tv_sec = req->nv1;
909	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
910	tv[1].tv_sec = req->nv2;
911	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
912
913	times = tv;
914	}
915	else
916	times = 0;
917
918
919	req->result = req->type == EIO_FUTIME
920	? futimes (req->int1, times)
921	: utimes (req->ptr1, times);
922	}
923
924	case EIO_GROUP:
925	case EIO_NOP:
926	break;
927
928	case EIO_QUIT:
929	goto quit;
930
931	default:
932	req->result = -1;
933	break;
934	}
935
936	req->errorno = errno;
937		1082
938	X_LOCK (reslock);	1083	X_LOCK (reslock);
939		1084
940	++npending;	1085	++npending;
941		1086
942	if (!reqq_push (&res_queue, req) && want_poll_cb)	1087	if (!reqq_push (&res_queue, req) && want_poll_cb)
943	want_poll_cb ();	1088	want_poll_cb ();
944		1089
945	self->req = 0;	1090	self->req = 0;
946	worker_clear (self);	1091	etp_worker_clear (self);
947		1092
948	X_UNLOCK (reslock);	1093	X_UNLOCK (reslock);
949	}	1094	}
950		1095
951	quit:	1096	quit:
952	X_LOCK (wrklock);	1097	X_LOCK (wrklock);
953	worker_free (self);	1098	etp_worker_free (self);
954	X_UNLOCK (wrklock);	1099	X_UNLOCK (wrklock);
955		1100
956	return 0;	1101	return 0;
957	}	1102	}
958		1103
959	/*****************************************************************************/	1104	/*****************************************************************************/
960		1105
961	static void eio_atfork_prepare (void)
962	{
963	X_LOCK (wrklock);
964	X_LOCK (reqlock);
965	X_LOCK (reslock);
966	#if !HAVE_PREADWRITE
967	X_LOCK (preadwritelock);
968	#endif
969	#if !HAVE_READDIR_R
970	X_LOCK (readdirlock);
971	#endif
972	}
973
974	static void eio_atfork_parent (void)
975	{
976	#if !HAVE_READDIR_R
977	X_UNLOCK (readdirlock);
978	#endif
979	#if !HAVE_PREADWRITE
980	X_UNLOCK (preadwritelock);
981	#endif
982	X_UNLOCK (reslock);
983	X_UNLOCK (reqlock);
984	X_UNLOCK (wrklock);
985	}
986
987	static void eio_atfork_child (void)
988	{
989	eio_req *prv;
990
991	while (prv = reqq_shift (&req_queue))
992	eio_destroy (prv);
993
994	while (prv = reqq_shift (&res_queue))
995	eio_destroy (prv);
996
997	while (wrk_first.next != &wrk_first)
998	{
999	worker *wrk = wrk_first.next;
1000
1001	if (wrk->req)
1002	eio_destroy (wrk->req);
1003
1004	worker_clear (wrk);
1005	worker_free (wrk);
1006	}
1007
1008	started = 0;
1009	idle = 0;
1010	nreqs = 0;
1011	nready = 0;
1012	npending = 0;
1013
1014	eio_atfork_parent ();
1015	}
1016
1017	int eio_init (void (want_poll)(void), void (done_poll)(void))	1106	int eio_init (void (want_poll)(void), void (done_poll)(void))
1018	{	1107	{
1019	want_poll_cb = want_poll;	1108	return etp_init (want_poll, done_poll);
1020	done_poll_cb = done_poll;
1021
1022	#ifdef _WIN32
1023	X_MUTEX_CHECK (wrklock);
1024	X_MUTEX_CHECK (reslock);
1025	X_MUTEX_CHECK (reqlock);
1026	X_MUTEX_CHECK (reqwait);
1027	X_MUTEX_CHECK (preadwritelock);
1028	X_MUTEX_CHECK (readdirlock);
1029
1030	X_COND_CHECK (reqwait);
1031	#endif
1032
1033	X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);
1034	}	1109	}
1035		1110
1036	static void eio_api_destroy (eio_req *req)	1111	static void eio_api_destroy (eio_req *req)
1037	{	1112	{
1038	free (req);	1113	free (req);
…		…
1043	\	1118	\
1044	req = (eio_req )calloc (1, sizeof req); \	1119	req = (eio_req )calloc (1, sizeof req); \
1045	if (!req) \	1120	if (!req) \
1046	return 0; \	1121	return 0; \
1047	\	1122	\
1048	req->type = EIO_ ## rtype; \	1123	req->type = rtype; \
1049	req->pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \	1124	req->pri = pri; \
1050	req->finish = cb; \	1125	req->finish = cb; \
		1126	req->data = data; \
1051	req->destroy = eio_api_destroy;	1127	req->destroy = eio_api_destroy;
1052		1128
1053	#define SEND eio_submit (req); return req	1129	#define SEND eio_submit (req); return req
1054		1130
1055	#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	}
1056		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
1057	eio_req *eio_fsync (int fd, eio_cb cb)	1263	eio_req eio_sync (int pri, eio_cb cb, void data)
1058	{	1264	{
		1265	REQ (EIO_SYNC); SEND;
		1266	}
		1267
		1268	eio_req eio_fsync (int fd, int pri, eio_cb cb, void data)
		1269	{
1059	REQ (FSYNC); req->int1 = fd; SEND;	1270	REQ (EIO_FSYNC); req->int1 = fd; SEND;
1060	}	1271	}
1061		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
1062	eio_req *eio_fdatasync (int fd, eio_cb cb)	1283	eio_req eio_fdatasync (int fd, int pri, eio_cb cb, void data)
1063	{	1284	{
1064	REQ (FDATASYNC); req->int1 = fd; SEND;	1285	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
1065	}	1286	}
1066		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
1067	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)
1068	{	1294	{
1069	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;
1070	}	1296	}
1071		1297
1072	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)
1073	{	1299	{
1074	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;
1075	}	1301	}
1076		1302
1077	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)
1078	{	1304	{
1079	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;
1080	}	1306	}
1081		1307
1082	eio_req *eio_fstat (int fd, eio_cb cb)	1308	eio_req eio_fstat (int fd, int pri, eio_cb cb, void data)
1083	{	1309	{
1084	REQ (FSTAT); req->int1 = fd; SEND;	1310	REQ (EIO_FSTAT); req->int1 = fd; SEND;
1085	}	1311	}
1086		1312
1087	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)
1088	{	1314	{
1089	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;
1090	}	1316	}
1091		1317
1092	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)
1093	{	1319	{
1094	REQ (FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;	1320	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
1095	}	1321	}
1096		1322
1097	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)
1098	{	1324	{
1099	REQ (FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;	1325	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
1100	}	1326	}
1101		1327
1102	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)
1103	{	1329	{
1104	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;
1105	}	1331	}
1106		1332
1107	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)
1108	{	1334	{
1109	REQ (DUP2); req->int1 = fd; req->int2 = fd2; SEND;	1335	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
1110	}	1336	}
1111		1337
1112	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)
1113	{	1339	{
1114	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;
1115	}	1341	}
1116		1342
1117	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)
1118	{	1344	{
1119	REQ (OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;	1345	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
1120	}	1346	}
1121		1347
1122	eio_req eio_readlink (const char path, eio_cb cb)
1123	{
1124	REQ (READLINK); PATH; SEND;
1125	}
1126
1127	eio_req eio_stat (const char path, eio_cb cb)
1128	{
1129	REQ (STAT); PATH; SEND;
1130	}
1131
1132	eio_req eio_lstat (const char path, eio_cb cb)
1133	{
1134	REQ (LSTAT); PATH; SEND;
1135	}
1136
1137	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)
1138	{	1349	{
1139	REQ (UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;	1350	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
1140	}	1351	}
1141		1352
1142	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)
1143	{	1354	{
1144	REQ (TRUNCATE); PATH; req->offs = offset; SEND;	1355	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
1145	}	1356	}
1146		1357
1147	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)
1148	{	1359	{
1149	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;
1150	}	1361	}
1151		1362
1152	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)
1153	{	1364	{
1154	REQ (CHMOD); PATH; req->int2 = (long)mode; SEND;	1365	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
1155	}	1366	}
1156		1367
1157	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)
1158	{	1369	{
1159	REQ (MKDIR); PATH; req->int2 = (long)mode; SEND;	1370	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
1160	}	1371	}
1161		1372
1162	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)
1163	{	1375	{
1164	REQ (UNLINK); PATH; SEND;
1165	}
1166
1167	eio_req eio_rmdir (const char path, eio_cb cb)
1168	{
1169	REQ (RMDIR); PATH; SEND;	1376	REQ (type); PATH; SEND;
1170	}	1377	}
1171		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
1172	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)
1173	{	1405	{
1174	REQ (READDIR); PATH; SEND;	1406	return eio__1path (EIO_READDIR, path, pri, cb, data);
1175	}	1407	}
1176		1408
1177	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)
1178	{	1410	{
1179	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;
1180	}	1412	}
1181		1413
1182	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)
1183	{	1416	{
1184	REQ (BUSY); req->nv1 = delay; SEND;	1417	REQ (type); PATH;
1185	}
1186		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
1187	eio_req *eio_nop (eio_cb cb)	1452	eio_req eio_grp (eio_cb cb, void data)
1188	{	1453	{
		1454	const int pri = EIO_PRI_MAX;
		1455
1189	REQ (NOP); SEND;	1456	REQ (EIO_GROUP); SEND;
1190	}	1457	}
1191		1458
1192	#undef REQ	1459	#undef REQ
1193	#undef PATH	1460	#undef PATH
1194	#undef SEND	1461	#undef SEND
1195		1462
1196	#if 0	1463	/*****************************************************************************/
1197		1464	/* grp functions */
1198	void
1199	aio_open (SV8 pathname, int flags, int mode, SV callback=&PL_sv_undef)
1200	PROTOTYPE: $$$;$
1201	PPCODE:
1202	{
1203	dREQ;
1204
1205	req->type = EIO_OPEN;
1206	req->sv1 = newSVsv (pathname);
1207	req->ptr1 = SvPVbyte_nolen (req->sv1);
1208	req->int1 = flags;
1209	req->int2 = mode;
1210
1211	EIO_SEND;
1212	}
1213
1214	void
1215	aio_fsync (SV fh, SV callback=&PL_sv_undef)
1216	PROTOTYPE: $;$
1217	ALIAS:
1218	aio_fsync = EIO_FSYNC
1219	aio_fdatasync = EIO_FDATASYNC
1220	PPCODE:
1221	{
1222	dREQ;
1223
1224	req->type = ix;
1225	req->sv1 = newSVsv (fh);
1226	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1227
1228	EIO_SEND (req);
1229	}
1230
1231	void
1232	aio_close (SV fh, SV callback=&PL_sv_undef)
1233	PROTOTYPE: $;$
1234	PPCODE:
1235	{
1236	dREQ;
1237
1238	req->type = EIO_CLOSE;
1239	req->sv1 = newSVsv (fh);
1240	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1241
1242	EIO_SEND (req);
1243	}
1244
1245	void
1246	aio_read (SV fh, SV offset, SV length, SV8 data, IV dataoffset, SV *callback=&PL_sv_undef)
1247	ALIAS:
1248	aio_read = EIO_READ
1249	aio_write = EIO_WRITE
1250	PROTOTYPE: $$$$$;$
1251	PPCODE:
1252	{
1253	STRLEN svlen;
1254	char *svptr = SvPVbyte (data, svlen);
1255	UV len = SvUV (length);
1256
1257	SvUPGRADE (data, SVt_PV);
1258	SvPOK_on (data);
1259
1260	if (dataoffset < 0)
1261	dataoffset += svlen;
1262
1263	if (dataoffset < 0 \|\| dataoffset > svlen)
1264	croak ("dataoffset outside of data scalar");
1265
1266	if (ix == EIO_WRITE)
1267	{
1268	/* write: check length and adjust. */
1269	if (!SvOK (length) \|\| len + dataoffset > svlen)
1270	len = svlen - dataoffset;
1271	}
1272	else
1273	{
1274	/* read: grow scalar as necessary */
1275	svptr = SvGROW (data, len + dataoffset + 1);
1276	}
1277
1278	if (len < 0)
1279	croak ("length must not be negative");
1280
1281	{
1282	dREQ;
1283
1284	req->type = ix;
1285	req->sv1 = newSVsv (fh);
1286	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1287	: IoOFP (sv_2io (fh)));
1288	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1289	req->size = len;
1290	req->sv2 = SvREFCNT_inc (data);
1291	req->ptr2 = (char *)svptr + dataoffset;
1292	req->stroffset = dataoffset;
1293
1294	if (!SvREADONLY (data))
1295	{
1296	SvREADONLY_on (data);
1297	req->flags \|= FLAG_SV2_RO_OFF;
1298	}
1299
1300	EIO_SEND;
1301	}
1302	}
1303
1304	void
1305	aio_readlink (SV8 path, SV callback=&PL_sv_undef)
1306	PROTOTYPE: $$;$
1307	PPCODE:
1308	{
1309	SV *data;
1310	dREQ;
1311
1312	data = newSV (NAME_MAX);
1313	SvPOK_on (data);
1314
1315	req->type = EIO_READLINK;
1316	req->sv1 = newSVsv (path);
1317	req->ptr1 = SvPVbyte_nolen (req->sv1);
1318	req->sv2 = data;
1319	req->ptr2 = SvPVbyte_nolen (data);
1320
1321	EIO_SEND;
1322	}
1323
1324	void
1325	aio_sendfile (SV out_fh, SV in_fh, SV in_offset, UV length, SV callback=&PL_sv_undef)
1326	PROTOTYPE: $$$$;$
1327	PPCODE:
1328	{
1329	dREQ;
1330
1331	req->type = EIO_SENDFILE;
1332	req->sv1 = newSVsv (out_fh);
1333	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1334	req->sv2 = newSVsv (in_fh);
1335	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1336	req->offs = SvVAL64 (in_offset);
1337	req->size = length;
1338
1339	EIO_SEND;
1340	}
1341
1342	void
1343	aio_readahead (SV fh, SV offset, IV length, SV *callback=&PL_sv_undef)
1344	PROTOTYPE: $$$;$
1345	PPCODE:
1346	{
1347	dREQ;
1348
1349	req->type = EIO_READAHEAD;
1350	req->sv1 = newSVsv (fh);
1351	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1352	req->offs = SvVAL64 (offset);
1353	req->size = length;
1354
1355	EIO_SEND;
1356	}
1357
1358	void
1359	aio_stat (SV8 fh_or_path, SV callback=&PL_sv_undef)
1360	ALIAS:
1361	aio_stat = EIO_STAT
1362	aio_lstat = EIO_LSTAT
1363	PPCODE:
1364	{
1365	dREQ;
1366
1367	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1368	if (!req->ptr2)
1369	{
1370	req_destroy (req);
1371	croak ("out of memory during aio_stat statdata allocation");
1372	}
1373
1374	req->flags \|= FLAG_PTR2_FREE;
1375	req->sv1 = newSVsv (fh_or_path);
1376
1377	if (SvPOK (fh_or_path))
1378	{
1379	req->type = ix;
1380	req->ptr1 = SvPVbyte_nolen (req->sv1);
1381	}
1382	else
1383	{
1384	req->type = EIO_FSTAT;
1385	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1386	}
1387
1388	EIO_SEND;
1389	}
1390
1391	void
1392	aio_utime (SV8 fh_or_path, SV atime, SV mtime, SV callback=&PL_sv_undef)
1393	PPCODE:
1394	{
1395	dREQ;
1396
1397	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1398	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1399	req->sv1 = newSVsv (fh_or_path);
1400
1401	if (SvPOK (fh_or_path))
1402	{
1403	req->type = EIO_UTIME;
1404	req->ptr1 = SvPVbyte_nolen (req->sv1);
1405	}
1406	else
1407	{
1408	req->type = EIO_FUTIME;
1409	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1410	}
1411
1412	EIO_SEND;
1413	}
1414
1415	void
1416	aio_truncate (SV8 fh_or_path, SV offset, SV *callback=&PL_sv_undef)
1417	PPCODE:
1418	{
1419	dREQ;
1420
1421	req->sv1 = newSVsv (fh_or_path);
1422	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1423
1424	if (SvPOK (fh_or_path))
1425	{
1426	req->type = EIO_TRUNCATE;
1427	req->ptr1 = SvPVbyte_nolen (req->sv1);
1428	}
1429	else
1430	{
1431	req->type = EIO_FTRUNCATE;
1432	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1433	}
1434
1435	EIO_SEND;
1436	}
1437
1438	void
1439	aio_chmod (SV8 fh_or_path, int mode, SV callback=&PL_sv_undef)
1440	ALIAS:
1441	aio_chmod = EIO_CHMOD
1442	aio_fchmod = EIO_FCHMOD
1443	aio_mkdir = EIO_MKDIR
1444	PPCODE:
1445	{
1446	dREQ;
1447
1448	req->type = type;
1449	req->int2 = mode;
1450	req->sv1 = newSVsv (fh_or_path);
1451
1452	if (ix == EIO_FCHMOD)
1453	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1454	else
1455	req->ptr1 = SvPVbyte_nolen (req->sv1);
1456
1457	EIO_SEND;
1458	}
1459
1460	void
1461	aio_chown (SV8 fh_or_path, SV uid, SV gid, SV callback=&PL_sv_undef)
1462	PPCODE:
1463	{
1464	dREQ;
1465
1466	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1467	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1468	req->sv1 = newSVsv (fh_or_path);
1469
1470	if (SvPOK (fh_or_path))
1471	{
1472	req->type = EIO_CHOWN;
1473	req->ptr1 = SvPVbyte_nolen (req->sv1);
1474	}
1475	else
1476	{
1477	req->type = EIO_FCHOWN;
1478	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1479	}
1480
1481	EIO_SEND;
1482	}
1483
1484	void
1485	aio_unlink (SV8 pathname, SV callback=&PL_sv_undef)
1486	ALIAS:
1487	aio_unlink = EIO_UNLINK
1488	aio_rmdir = EIO_RMDIR
1489	aio_readdir = EIO_READDIR
1490	PPCODE:
1491	{
1492	dREQ;
1493
1494	req->type = ix;
1495	req->sv1 = newSVsv (pathname);
1496	req->ptr1 = SvPVbyte_nolen (req->sv1);
1497
1498	EIO_SEND;
1499	}
1500
1501	void
1502	aio_link (SV8 oldpath, SV8 newpath, SV *callback=&PL_sv_undef)
1503	ALIAS:
1504	aio_link = EIO_LINK
1505	aio_symlink = EIO_SYMLINK
1506	aio_rename = EIO_RENAME
1507	PPCODE:
1508	{
1509	dREQ;
1510
1511	req->type = ix;
1512	req->sv1 = newSVsv (oldpath);
1513	req->ptr1 = SvPVbyte_nolen (req->sv1);
1514	req->sv2 = newSVsv (newpath);
1515	req->ptr2 = SvPVbyte_nolen (req->sv2);
1516
1517	EIO_SEND;
1518	}
1519
1520	void
1521	aio_mknod (SV8 pathname, int mode, UV dev, SV callback=&PL_sv_undef)
1522	PPCODE:
1523	{
1524	dREQ;
1525
1526	req->type = EIO_MKNOD;
1527	req->sv1 = newSVsv (pathname);
1528	req->ptr1 = SvPVbyte_nolen (req->sv1);
1529	req->int2 = (mode_t)mode;
1530	req->offs = dev;
1531
1532	EIO_SEND;
1533	}
1534
1535	void
1536	aio_busy (double delay, SV *callback=&PL_sv_undef)
1537	PPCODE:
1538	{
1539	dREQ;
1540
1541	req->type = EIO_BUSY;
1542	req->nv1 = delay < 0. ? 0. : delay;
1543
1544	EIO_SEND;
1545	}
1546
1547	void
1548	aio_group (SV *callback=&PL_sv_undef)
1549	PROTOTYPE: ;$
1550	PPCODE:
1551	{
1552	dREQ;
1553
1554	req->type = EIO_GROUP;
1555
1556	req_send (req);
1557	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1558	}
1559
1560	void
1561	aio_nop (SV *callback=&PL_sv_undef)
1562	ALIAS:
1563	aio_nop = EIO_NOP
1564	aio_sync = EIO_SYNC
1565	PPCODE:
1566	{
1567	dREQ;
1568
1569	#endif
1570		1465
1571	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)
1572	{	1467	{
1573	grp->int2 = limit;	1468	grp->int2 = limit;
1574	grp->feed = feed;	1469	grp->feed = feed;
…		…
1597	grp->grp_first->grp_prev = req;	1492	grp->grp_first->grp_prev = req;
1598		1493
1599	grp->grp_first = req;	1494	grp->grp_first = req;
1600	}	1495	}
1601		1496
		1497	/*****************************************************************************/
		1498	/* misc garbage */
1602		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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Comparing libeio/eio.c (file contents): Revision 1.8 by root, Sun May 11 20:08:37 2008 UTC vs. Revision 1.24 by root, Tue Sep 30 13:17:32 2008 UTC

Diff Legend

Comparing libeio/eio.c (file contents):
Revision 1.8 by root, Sun May 11 20:08:37 2008 UTC vs.
Revision 1.24 by root, Tue Sep 30 13:17:32 2008 UTC