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

Comparing libeio/eio.c (file contents):
Revision 1.2 by root, Sat May 10 23:33:40 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
6	#include "EXTERN.h"
7	#include "perl.h"
8	#include "XSUB.h"
9
10	#include <stddef.h>	44	#include <stddef.h>
11	#include <stdlib.h>	45	#include <stdlib.h>
		46	#include <string.h>
12	#include <errno.h>	47	#include <errno.h>
13	#include <sys/types.h>	48	#include <sys/types.h>
14	#include <sys/stat.h>	49	#include <sys/stat.h>
15	#include <limits.h>	50	#include <limits.h>
16	#include <fcntl.h>	51	#include <fcntl.h>
17	#include <sched.h>	52	#include <assert.h>
18		53
19	#ifndef EIO_FINISH	54	#ifndef EIO_FINISH
20	# 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
21	#endif	56	#endif
22		57
38	# include <sys/time.h>	73	# include <sys/time.h>
39	# include <sys/select.h>	74	# include <sys/select.h>
40	# include <unistd.h>	75	# include <unistd.h>
41	# include <utime.h>	76	# include <utime.h>
42	# include <signal.h>	77	# include <signal.h>
		78	# include <dirent.h>
43		79
44	# ifndef EIO_STRUCT_DIRENT	80	# ifndef EIO_STRUCT_DIRENT
45	# define EIO_STRUCT_DIRENT struct dirent	81	# define EIO_STRUCT_DIRENT struct dirent
46	# endif	82	# endif
47		83
48	#endif	84	#endif
49
50	# ifndef EIO_STRUCT_STAT
51	# define EIO_STRUCT_STAT struct stat
52	# endif
53		85
54	#if HAVE_SENDFILE	86	#if HAVE_SENDFILE
55	# if __linux	87	# if __linux
56	# include <sys/sendfile.h>	88	# include <sys/sendfile.h>
57	# elif __freebsd	89	# elif __freebsd
…		…
77	/* buffer size for various temporary buffers */	109	/* buffer size for various temporary buffers */
78	#define EIO_BUFSIZE 65536	110	#define EIO_BUFSIZE 65536
79		111
80	#define dBUF \	112	#define dBUF \
81	char *eio_buf; \	113	char *eio_buf; \
82	X_LOCK (wrklock); \	114	ETP_WORKER_LOCK (self); \
83	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	115	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \
84	X_UNLOCK (wrklock); \	116	ETP_WORKER_UNLOCK (self); \
		117	errno = ENOMEM; \
85	if (!eio_buf) \	118	if (!eio_buf) \
86	return -1;	119	return -1;
87		120
88	#define EIO_TICKS ((1000000 + 1023) >> 10)	121	#define EIO_TICKS ((1000000 + 1023) >> 10)
89		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
90	static void (*want_poll_cb) (void);	177	static void (*want_poll_cb) (void);
91	static void (*done_poll_cb) (void);	178	static void (*done_poll_cb) (void);
92		179
93	static unsigned int max_poll_time = 0;	180	static unsigned int max_poll_time; /* reslock */
94	static unsigned int max_poll_reqs = 0;	181	static unsigned int max_poll_reqs; /* reslock */
95		182
96	/* calculcate time difference in ~1/EIO_TICKS of a second */	183	static volatile unsigned int nreqs; /* reqlock */
97	static int tvdiff (struct timeval tv1, struct timeval tv2)	184	static volatile unsigned int nready; /* reqlock */
98	{	185	static volatile unsigned int npending; /* reqlock */
99	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	186	static volatile unsigned int max_idle = 4;
100	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
101	}
102		187
103	static unsigned int started, idle, wanted;
104
105	/* worker threads management */
106	static mutex_t wrklock = X_MUTEX_INIT;	188	static mutex_t wrklock = X_MUTEX_INIT;
107
108	typedef struct worker {
109	/* locked by wrklock */
110	struct worker prev, next;
111
112	thread_t tid;
113
114	/* locked by reslock, reqlock or wrklock */
115	eio_req req; / currently processed request */
116	void *dbuf;
117	DIR *dirp;
118	} worker;
119
120	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
121
122	static void worker_clear (worker *wrk)
123	{
124	if (wrk->dirp)
125	{
126	closedir (wrk->dirp);
127	wrk->dirp = 0;
128	}
129
130	if (wrk->dbuf)
131	{
132	free (wrk->dbuf);
133	wrk->dbuf = 0;
134	}
135	}
136
137	static void worker_free (worker *wrk)
138	{
139	wrk->next->prev = wrk->prev;
140	wrk->prev->next = wrk->next;
141
142	free (wrk);
143	}
144
145	static volatile unsigned int nreqs, nready, npending;
146	static volatile unsigned int max_idle = 4;
147
148	static mutex_t reslock = X_MUTEX_INIT;	189	static mutex_t reslock = X_MUTEX_INIT;
149	static mutex_t reqlock = X_MUTEX_INIT;	190	static mutex_t reqlock = X_MUTEX_INIT;
150	static cond_t reqwait = X_COND_INIT;	191	static cond_t reqwait = X_COND_INIT;
151		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
152	unsigned int eio_nreqs (void)	235	static unsigned int etp_nreqs (void)
153	{	236	{
		237	int retval;
		238	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		239	retval = nreqs;
		240	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
154	return nreqs;	241	return retval;
155	}	242	}
156		243
157	unsigned int eio_nready (void)	244	static unsigned int etp_nready (void)
158	{	245	{
159	unsigned int retval;	246	unsigned int retval;
160		247
161	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	248	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
162	retval = nready;	249	retval = nready;
163	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	250	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
164		251
165	return retval;	252	return retval;
166	}	253	}
167		254
168	unsigned int eio_npending (void)	255	static unsigned int etp_npending (void)
169	{	256	{
170	unsigned int retval;	257	unsigned int retval;
171		258
172	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	259	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
173	retval = npending;	260	retval = npending;
174	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	261	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
175		262
176	return retval;	263	return retval;
177	}	264	}
178		265
179	unsigned int eio_nthreads (void)	266	static unsigned int etp_nthreads (void)
180	{	267	{
181	unsigned int retval;	268	unsigned int retval;
182		269
183	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	270	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
184	retval = started;	271	retval = started;
…		…
191	* a somewhat faster data structure might be nice, but	278	* a somewhat faster data structure might be nice, but
192	* with 8 priorities this actually needs <20 insns	279	* with 8 priorities this actually needs <20 insns
193	* per shift, the most expensive operation.	280	* per shift, the most expensive operation.
194	*/	281	*/
195	typedef struct {	282	typedef struct {
196	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 */
197	int size;	284	int size;
198	} reqq;	285	} etp_reqq;
199		286
200	static reqq req_queue;	287	static etp_reqq req_queue;
201	static reqq res_queue;	288	static etp_reqq res_queue;
202		289
203	static int reqq_push (reqq q, eio_req req)	290	static int reqq_push (etp_reqq q, ETP_REQ req)
204	{	291	{
205	int pri = req->pri;	292	int pri = req->pri;
206	req->next = 0;	293	req->next = 0;
207		294
208	if (q->qe[pri])	295	if (q->qe[pri])
…		…
214	q->qe[pri] = q->qs[pri] = req;	301	q->qe[pri] = q->qs[pri] = req;
215		302
216	return q->size++;	303	return q->size++;
217	}	304	}
218		305
219	static eio_req reqq_shift (reqq q)	306	static ETP_REQ reqq_shift (etp_reqq q)
220	{	307	{
221	int pri;	308	int pri;
222		309
223	if (!q->size)	310	if (!q->size)
224	return 0;	311	return 0;
225		312
226	--q->size;	313	--q->size;
227		314
228	for (pri = EIO_NUM_PRI; pri--; )	315	for (pri = ETP_NUM_PRI; pri--; )
229	{	316	{
230	eio_req *req = q->qs[pri];	317	eio_req *req = q->qs[pri];
231		318
232	if (req)	319	if (req)
233	{	320	{
…		…
238	}	325	}
239	}	326	}
240		327
241	abort ();	328	abort ();
242	}	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	/*****************************************************************************/
243		604
244	static void grp_try_feed (eio_req *grp)	605	static void grp_try_feed (eio_req *grp)
245	{	606	{
246	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	607	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
247	{	608	{
…		…
256	break;	617	break;
257	}	618	}
258	}	619	}
259	}	620	}
260		621
261	static int eio_finish (eio_req *req);
262
263	static int grp_dec (eio_req *grp)	622	static int grp_dec (eio_req *grp)
264	{	623	{
265	--grp->size;	624	--grp->size;
266		625
267	/* call feeder, if applicable */	626	/* call feeder, if applicable */
…		…
274	return 0;	633	return 0;
275	}	634	}
276		635
277	void eio_destroy (eio_req *req)	636	void eio_destroy (eio_req *req)
278	{	637	{
		638	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
279	if ((req)->flags & EIO_FLAG_PTR2_FREE)	639	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
280	free (req->ptr2);
281		640
282	EIO_DESTROY (req);	641	EIO_DESTROY (req);
283	}	642	}
284		643
285	static int eio_finish (eio_req *req)	644	static int eio_finish (eio_req *req)
…		…
315	eio_cancel (grp);	674	eio_cancel (grp);
316	}	675	}
317		676
318	void eio_cancel (eio_req *req)	677	void eio_cancel (eio_req *req)
319	{	678	{
320	req->flags \|= EIO_FLAG_CANCELLED;
321
322	eio_grp_cancel (req);	679	etp_cancel (req);
323	}
324
325	X_THREAD_PROC (eio_proc);
326
327	static void start_thread (void)
328	{
329	worker *wrk = calloc (1, sizeof (worker));
330
331	if (!wrk)
332	croak ("unable to allocate worker thread data");
333
334	X_LOCK (wrklock);
335
336	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))
337	{
338	wrk->prev = &wrk_first;
339	wrk->next = wrk_first.next;
340	wrk_first.next->prev = wrk;
341	wrk_first.next = wrk;
342	++started;
343	}
344	else
345	free (wrk);
346
347	X_UNLOCK (wrklock);
348	}
349
350	static void maybe_start_thread (void)
351	{
352	if (eio_nthreads () >= wanted)
353	return;
354
355	/* todo: maybe use idle here, but might be less exact */
356	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())
357	return;
358
359	start_thread ();
360	}	680	}
361		681
362	void eio_submit (eio_req *req)	682	void eio_submit (eio_req *req)
363	{	683	{
364	++nreqs;	684	etp_submit (req);
365
366	X_LOCK (reqlock);
367	++nready;
368	reqq_push (&req_queue, req);
369	X_COND_SIGNAL (reqwait);
370	X_UNLOCK (reqlock);
371
372	maybe_start_thread ();
373	}	685	}
374		686
375	static void end_thread (void)	687	unsigned int eio_nreqs (void)
376	{	688	{
377	eio_req *req = calloc (1, sizeof (eio_req));	689	return etp_nreqs ();
		690	}
378		691
379	req->type = EIO_QUIT;	692	unsigned int eio_nready (void)
380	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	693	{
		694	return etp_nready ();
		695	}
381		696
382	X_LOCK (reqlock);	697	unsigned int eio_npending (void)
383	reqq_push (&req_queue, req);	698	{
384	X_COND_SIGNAL (reqwait);	699	return etp_npending ();
385	X_UNLOCK (reqlock);	700	}
386		701
387	X_LOCK (wrklock);	702	unsigned int eio_nthreads (void)
388	--started;	703	{
389	X_UNLOCK (wrklock);	704	return etp_nthreads ();
390	}	705	}
391		706
392	void eio_set_max_poll_time (double nseconds)	707	void eio_set_max_poll_time (double nseconds)
393	{	708	{
394	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
395	max_poll_time = nseconds;	709	etp_set_max_poll_time (nseconds);
396	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
397	}	710	}
398		711
399	void eio_set_max_poll_reqs (unsigned int maxreqs)	712	void eio_set_max_poll_reqs (unsigned int maxreqs)
400	{	713	{
401	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
402	max_poll_reqs = maxreqs;	714	etp_set_max_poll_reqs (maxreqs);
403	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
404	}	715	}
405		716
406	void eio_set_max_idle (unsigned int nthreads)	717	void eio_set_max_idle (unsigned int nthreads)
407	{	718	{
408	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	719	etp_set_max_idle (nthreads);
409	max_idle = nthreads <= 0 ? 1 : nthreads;
410	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
411	}	720	}
412		721
413	void eio_set_min_parallel (unsigned int nthreads)	722	void eio_set_min_parallel (unsigned int nthreads)
414	{	723	{
415	if (wanted < nthreads)	724	etp_set_min_parallel (nthreads);
416	wanted = nthreads;
417	}	725	}
418		726
419	void eio_set_max_parallel (unsigned int nthreads)	727	void eio_set_max_parallel (unsigned int nthreads)
420	{	728	{
421	if (wanted > nthreads)	729	etp_set_max_parallel (nthreads);
422	wanted = nthreads;
423
424	while (started > wanted)
425	end_thread ();
426	}	730	}
427		731
428	int eio_poll (void)	732	int eio_poll (void)
429	{	733	{
430	int maxreqs = max_poll_reqs;	734	return etp_poll ();
431	struct timeval tv_start, tv_now;
432	eio_req *req;
433
434	if (max_poll_time)
435	gettimeofday (&tv_start, 0);
436
437	for (;;)
438	{
439	maybe_start_thread ();
440
441	X_LOCK (reslock);
442	req = reqq_shift (&res_queue);
443
444	if (req)
445	{
446	--npending;
447
448	if (!res_queue.size && done_poll_cb)
449	done_poll_cb ();
450	}
451
452	X_UNLOCK (reslock);
453
454	if (!req)
455	return 0;
456
457	--nreqs;
458
459	if (req->type == EIO_GROUP && req->size)
460	{
461	req->int1 = 1; /* mark request as delayed */
462	continue;
463	}
464	else
465	{
466	int res = eio_finish (req);
467	if (res)
468	return res;
469	}
470
471	if (maxreqs && !--maxreqs)
472	break;
473
474	if (max_poll_time)
475	{
476	gettimeofday (&tv_now, 0);
477
478	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
479	break;
480	}
481	}
482
483	errno = EAGAIN;
484	return -1;
485	}	735	}
486		736
487	/*****************************************************************************/	737	/*****************************************************************************/
488	/* work around various missing functions */	738	/* work around various missing functions */
489		739
490	#if !HAVE_PREADWRITE	740	#if !HAVE_PREADWRITE
491	# define pread aio_pread	741	# define pread eio__pread
492	# define pwrite aio_pwrite	742	# define pwrite eio__pwrite
493		743
494	/*	744	static ssize_t
495	* make our pread/pwrite safe against themselves, but not against	745	eio__pread (int fd, void *buf, size_t count, off_t offset)
496	* normal read/write by using a mutex. slows down execution a lot,
497	* but that's your problem, not mine.
498	*/
499	static mutex_t preadwritelock = X_MUTEX_INIT;
500
501	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
502	{	746	{
503	ssize_t res;	747	ssize_t res;
504	off_t ooffset;	748	off_t ooffset;
505		749
506	X_LOCK (preadwritelock);	750	X_LOCK (preadwritelock);
…		…
511	X_UNLOCK (preadwritelock);	755	X_UNLOCK (preadwritelock);
512		756
513	return res;	757	return res;
514	}	758	}
515		759
516	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)
517	{	762	{
518	ssize_t res;	763	ssize_t res;
519	off_t ooffset;	764	off_t ooffset;
520		765
521	X_LOCK (preadwritelock);	766	X_LOCK (preadwritelock);
…		…
529	}	774	}
530	#endif	775	#endif
531		776
532	#ifndef HAVE_FUTIMES	777	#ifndef HAVE_FUTIMES
533		778
534	# define utimes(path,times) aio_utimes (path, times)	779	# define utimes(path,times) eio__utimes (path, times)
535	# define futimes(fd,times) aio_futimes (fd, times)	780	# define futimes(fd,times) eio__futimes (fd, times)
536		781
		782	static int
537	static int aio_utimes (const char *filename, const struct timeval times[2])	783	eio__utimes (const char *filename, const struct timeval times[2])
538	{	784	{
539	if (times)	785	if (times)
540	{	786	{
541	struct utimbuf buf;	787	struct utimbuf buf;
542		788
…		…
547	}	793	}
548	else	794	else
549	return utime (filename, 0);	795	return utime (filename, 0);
550	}	796	}
551		797
552	static int aio_futimes (int fd, const struct timeval tv[2])	798	static int eio__futimes (int fd, const struct timeval tv[2])
553	{	799	{
554	errno = ENOSYS;	800	errno = ENOSYS;
555	return -1;	801	return -1;
556	}	802	}
557		803
…		…
560	#if !HAVE_FDATASYNC	806	#if !HAVE_FDATASYNC
561	# define fdatasync fsync	807	# define fdatasync fsync
562	#endif	808	#endif
563		809
564	#if !HAVE_READAHEAD	810	#if !HAVE_READAHEAD
565	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	811	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
566		812
		813	static ssize_t
567	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)
568	{	815	{
569	size_t todo = count;	816	size_t todo = count;
570	dBUF;	817	dBUF;
571		818
572	while (todo > 0)	819	while (todo > 0)
573	{	820	{
574	size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE;	821	size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE;
575		822
576	pread (fd, aio_buf, len, offset);	823	pread (fd, eio_buf, len, offset);
577	offset += len;	824	offset += len;
578	todo -= len;	825	todo -= len;
579	}	826	}
580		827
581	errno = 0;	828	errno = 0;
582	return count;	829	return count;
583	}	830	}
584		831
585	#endif	832	#endif
586		833
587	#if !HAVE_READDIR_R
588	# define readdir_r aio_readdir_r
589
590	static mutex_t readdirlock = X_MUTEX_INIT;
591
592	static int readdir_r (DIR dirp, X_DIRENT ent, X_DIRENT **res)
593	{
594	X_DIRENT *e;
595	int errorno;
596
597	X_LOCK (readdirlock);
598
599	e = readdir (dirp);
600	errorno = errno;
601
602	if (e)
603	{
604	*res = ent;
605	strcpy (ent->d_name, e->d_name);
606	}
607	else
608	*res = 0;
609
610	X_UNLOCK (readdirlock);
611
612	errno = errorno;
613	return e ? 0 : -1;
614	}
615	#endif
616
617	/* sendfile always needs emulation */	834	/* sendfile always needs emulation */
		835	static ssize_t
618	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)
619	{	837	{
620	ssize_t res;	838	ssize_t res;
621		839
622	if (!count)	840	if (!count)
623	return 0;	841	return 0;
…		…
706		924
707	return res;	925	return res;
708	}	926	}
709		927
710	/* read a full directory */	928	/* read a full directory */
		929	static void
711	static void scandir_ (eio_req req, worker self)	930	eio__scandir (eio_req req, etp_worker self)
712	{	931	{
713	DIR *dirp;	932	DIR *dirp;
714	union
715	{
716	EIO_STRUCT_DIRENT d;
717	char b [offsetof (EIO_STRUCT_DIRENT, d_name) + NAME_MAX + 1];
718	} *u;
719	EIO_STRUCT_DIRENT *entp;	933	EIO_STRUCT_DIRENT *entp;
720	char name, names;	934	char name, names;
721	int memlen = 4096;	935	int memlen = 4096;
722	int memofs = 0;	936	int memofs = 0;
723	int res = 0;	937	int res = 0;
724		938
725	X_LOCK (wrklock);	939	X_LOCK (wrklock);
		940	/* the corresponding closedir is in ETP_WORKER_CLEAR */
726	self->dirp = dirp = opendir (req->ptr1);	941	self->dirp = dirp = opendir (req->ptr1);
727	self->dbuf = u = malloc (sizeof (*u));
728	req->flags \|= EIO_FLAG_PTR2_FREE;	942	req->flags \|= EIO_FLAG_PTR2_FREE;
729	req->ptr2 = names = malloc (memlen);	943	req->ptr2 = names = malloc (memlen);
730	X_UNLOCK (wrklock);	944	X_UNLOCK (wrklock);
731		945
732	if (dirp && u && names)	946	if (dirp && names)
733	for (;;)	947	for (;;)
734	{	948	{
735	errno = 0;	949	errno = 0;
736	readdir_r (dirp, &u->d, &entp);	950	entp = readdir (dirp);
737		951
738	if (!entp)	952	if (!entp)
739	break;	953	break;
740		954
741	name = entp->d_name;	955	name = entp->d_name;
…		…
766	res = -1;	980	res = -1;
767		981
768	req->result = res;	982	req->result = res;
769	}	983	}
770		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
771	/*****************************************************************************/	1014	/*****************************************************************************/
772		1015
		1016	#define ALLOC(len) \
		1017	if (!req->ptr2) \
		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	{ \
		1025	errno = ENOMEM; \
		1026	req->result = -1; \
		1027	break; \
		1028	} \
		1029	}
		1030
773	X_THREAD_PROC (eio_proc)	1031	X_THREAD_PROC (etp_proc)
774	{	1032	{
775	eio_req *req;	1033	ETP_REQ *req;
776	struct timespec ts;	1034	struct timespec ts;
777	worker self = (worker )thr_arg;	1035	etp_worker self = (etp_worker )thr_arg;
778		1036
779	/* try to distribute timeouts somewhat randomly */	1037	/* try to distribute timeouts somewhat randomly */
780	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1038	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
781		1039
782	for (;;)	1040	for (;;)
783	{	1041	{
784	ts.tv_sec = time (0) + IDLE_TIMEOUT;
785
786	X_LOCK (reqlock);	1042	X_LOCK (reqlock);
787		1043
788	for (;;)	1044	for (;;)
789	{	1045	{
790	self->req = req = reqq_shift (&req_queue);	1046	self->req = req = reqq_shift (&req_queue);
…		…
792	if (req)	1048	if (req)
793	break;	1049	break;
794		1050
795	++idle;	1051	++idle;
796		1052
		1053	ts.tv_sec = time (0) + IDLE_TIMEOUT;
797	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1054	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
798	{	1055	{
799	if (idle > max_idle)	1056	if (idle > max_idle)
800	{	1057	{
801	--idle;	1058	--idle;
…		…
806	goto quit;	1063	goto quit;
807	}	1064	}
808		1065
809	/* we are allowed to idle, so do so without any timeout */	1066	/* we are allowed to idle, so do so without any timeout */
810	X_COND_WAIT (reqwait, reqlock);	1067	X_COND_WAIT (reqwait, reqlock);
811	ts.tv_sec = time (0) + IDLE_TIMEOUT;
812	}	1068	}
813		1069
814	--idle;	1070	--idle;
815	}	1071	}
816		1072
817	--nready;	1073	--nready;
818		1074
819	X_UNLOCK (reqlock);	1075	X_UNLOCK (reqlock);
820		1076
821	errno = 0; /* strictly unnecessary */	1077	if (req->type < 0)
		1078	goto quit;
822		1079
823	if (!EIO_CANCELLED (req))	1080	if (!EIO_CANCELLED (req))
824	switch (req->type)	1081	ETP_EXECUTE (self, req);
825	{
826	case EIO_READ: req->result = req->offs >= 0
827	? pread (req->int1, req->ptr2, req->size, req->offs)
828	: read (req->int1, req->ptr2, req->size); break;
829	case EIO_WRITE: req->result = req->offs >= 0
830	? pwrite (req->int1, req->ptr2, req->size, req->offs)
831	: write (req->int1, req->ptr2, req->size); break;
832
833	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
834	case EIO_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
835
836	case EIO_STAT: req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
837	case EIO_LSTAT: req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
838	case EIO_FSTAT: req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
839
840	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
841	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
842	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
843	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
844	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
845	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
846
847	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
848	case EIO_CLOSE: req->result = close (req->int1); break;
849	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
850	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
851	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
852	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
853	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
854	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
855	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
856	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
857	case EIO_READLINK: req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
858
859	case EIO_SYNC: req->result = 0; sync (); break;
860	case EIO_FSYNC: req->result = fsync (req->int1); break;
861	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
862
863	case EIO_READDIR: scandir_ (req, self); break;
864
865	case EIO_BUSY:
866	#ifdef _WIN32
867	Sleep (req->nv1 * 1000.);
868	#else
869	{
870	struct timeval tv;
871
872	tv.tv_sec = req->nv1;
873	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
874
875	req->result = select (0, 0, 0, 0, &tv);
876	}
877	#endif
878	break;
879
880	case EIO_UTIME:
881	case EIO_FUTIME:
882	{
883	struct timeval tv[2];
884	struct timeval *times;
885
886	if (req->nv1 != -1. \|\| req->nv2 != -1.)
887	{
888	tv[0].tv_sec = req->nv1;
889	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
890	tv[1].tv_sec = req->nv2;
891	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
892
893	times = tv;
894	}
895	else
896	times = 0;
897
898
899	req->result = req->type == EIO_FUTIME
900	? futimes (req->int1, times)
901	: utimes (req->ptr1, times);
902	}
903
904	case EIO_GROUP:
905	case EIO_NOP:
906	break;
907
908	case EIO_QUIT:
909	goto quit;
910
911	default:
912	req->result = -1;
913	break;
914	}
915
916	req->errorno = errno;
917		1082
918	X_LOCK (reslock);	1083	X_LOCK (reslock);
919		1084
920	++npending;	1085	++npending;
921		1086
922	if (!reqq_push (&res_queue, req) && want_poll_cb)	1087	if (!reqq_push (&res_queue, req) && want_poll_cb)
923	want_poll_cb ();	1088	want_poll_cb ();
924		1089
925	self->req = 0;	1090	self->req = 0;
926	worker_clear (self);	1091	etp_worker_clear (self);
927		1092
928	X_UNLOCK (reslock);	1093	X_UNLOCK (reslock);
929	}	1094	}
930		1095
931	quit:	1096	quit:
932	X_LOCK (wrklock);	1097	X_LOCK (wrklock);
933	worker_free (self);	1098	etp_worker_free (self);
934	X_UNLOCK (wrklock);	1099	X_UNLOCK (wrklock);
935		1100
936	return 0;	1101	return 0;
937	}	1102	}
938		1103
939	/*****************************************************************************/	1104	/*****************************************************************************/
940		1105
941	static void eio_atfork_prepare (void)	1106	int eio_init (void (want_poll)(void), void (done_poll)(void))
942	{	1107	{
943	X_LOCK (wrklock);	1108	return etp_init (want_poll, done_poll);
944	X_LOCK (reqlock);
945	X_LOCK (reslock);
946	#if !HAVE_PREADWRITE
947	X_LOCK (preadwritelock);
948	#endif
949	#if !HAVE_READDIR_R
950	X_LOCK (readdirlock);
951	#endif
952	}	1109	}
953		1110
954	static void eio_atfork_parent (void)	1111	static void eio_api_destroy (eio_req *req)
955	{	1112	{
956	#if !HAVE_READDIR_R	1113	free (req);
957	X_UNLOCK (readdirlock);
958	#endif
959	#if !HAVE_PREADWRITE
960	X_UNLOCK (preadwritelock);
961	#endif
962	X_UNLOCK (reslock);
963	X_UNLOCK (reqlock);
964	X_UNLOCK (wrklock);
965	}	1114	}
966		1115
967	static void eio_atfork_child (void)	1116	#define REQ(rtype) \
968	{	1117	eio_req *req; \
969	eio_req *prv;	1118	\
		1119	req = (eio_req )calloc (1, sizeof req); \
		1120	if (!req) \
		1121	return 0; \
		1122	\
		1123	req->type = rtype; \
		1124	req->pri = pri; \
		1125	req->finish = cb; \
		1126	req->data = data; \
		1127	req->destroy = eio_api_destroy;
970		1128
971	while (prv = reqq_shift (&req_queue))	1129	#define SEND eio_submit (req); return req
972	eio_destroy (prv);
973		1130
974	while (prv = reqq_shift (&res_queue))	1131	#define PATH \
975	eio_destroy (prv);	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	}
976		1139
977	while (wrk_first.next != &wrk_first)	1140	static void eio_execute (etp_worker self, eio_req req)
		1141	{
		1142	errno = 0;
		1143
		1144	switch (req->type)
978	{	1145	{
979	worker *wrk = wrk_first.next;	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;
980		1153
981	if (wrk->req)	1154	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
982	eio_destroy (wrk->req);	1155	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break;
983		1156
984	worker_clear (wrk);	1157	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
985	worker_free (wrk);	1158	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
986	}	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;
987		1163
988	started = 0;	1164	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
989	idle = 0;	1165	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
990	nreqs = 0;	1166	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
991	nready = 0;	1167	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
992	npending = 0;	1168	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		1169	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
993		1170
994	eio_atfork_parent ();	1171	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
995	}	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;
996		1181
997	int eio_init (void (want_poll)(void), void (done_poll)(void))	1182	case EIO_READLINK: ALLOC (NAME_MAX);
998	{	1183	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
999	want_poll_cb = want_poll;
1000	done_poll_cb = done_poll;
1001		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:
1002	#ifdef _WIN32	1194	#ifdef _WIN32
1003	X_MUTEX_CHECK (wrklock);	1195	Sleep (req->nv1 * 1000.);
1004	X_MUTEX_CHECK (reslock);	1196	#else
1005	X_MUTEX_CHECK (reqlock);
1006	X_MUTEX_CHECK (reqwait);
1007	X_MUTEX_CHECK (preadwritelock);
1008	X_MUTEX_CHECK (readdirlock);
1009
1010	X_COND_CHECK (reqwait);
1011	#endif
1012
1013	X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);
1014	}
1015
1016	#if 0
1017
1018	eio_req *eio_fsync (int fd, eio_cb cb);
1019	eio_req *eio_fdatasync (int fd, eio_cb cb);
1020	eio_req *eio_dupclose (int fd, eio_cb cb);
1021	eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb);
1022	eio_req eio_read (int fd, off_t offs, size_t length, char data, eio_cb cb);
1023	eio_req eio_write (int fd, off_t offs, size_t length, char data, eio_cb cb);
1024	eio_req eio_fstat (int fd, eio_cb cb); / stat buffer=ptr2 allocates dynamically */
1025	eio_req *eio_futime (int fd, double atime, double mtime, eio_cb cb);
1026	eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb);
1027	eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb);
1028	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb);
1029	eio_req *eio_dup2 (int fd, int fd2, eio_cb cb);
1030	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb);
1031	eio_req eio_open (const char path, int flags, mode_t mode, eio_cb cb);
1032	eio_req eio_readlink (const char path, eio_cb cb); /* result=ptr2 allocated dynamically */
1033	eio_req eio_stat (const char path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */
1034	eio_req eio_lstat (const char path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */
1035	eio_req eio_utime (const char path, double atime, double mtime, eio_cb cb);
1036	eio_req eio_truncate (const char path, off_t offset, eio_cb cb);
1037	eio_req eio_chmod (const char path, mode_t mode, eio_cb cb);
1038	eio_req eio_mkdir (const char path, mode_t mode, eio_cb cb);
1039	eio_req eio_chown (const char path, uid_t uid, gid_t gid, eio_cb cb);
1040	eio_req eio_unlink (const char path, eio_cb cb);
1041	eio_req eio_rmdir (const char path, eio_cb cb);
1042	eio_req eio_readdir (const char path, eio_cb cb); /* result=ptr2 allocated dynamically */
1043	eio_req eio_mknod (const char path, mode_t mode, dev_t dev, eio_cb cb);
1044	eio_req eio_busy (double delay, eio_cb cb); / ties a thread for this long, simulating busyness */
1045	eio_req eio_nop (eio_cb cb); / does nothing except go through the whole process */
1046	void
1047	aio_open (SV8 pathname, int flags, int mode, SV callback=&PL_sv_undef)
1048	PROTOTYPE: $$$;$
1049	PPCODE:
1050	{
1051	dREQ;
1052
1053	req->type = EIO_OPEN;
1054	req->sv1 = newSVsv (pathname);
1055	req->ptr1 = SvPVbyte_nolen (req->sv1);
1056	req->int1 = flags;
1057	req->int2 = mode;
1058
1059	EIO_SEND;
1060	}
1061
1062	void
1063	aio_fsync (SV fh, SV callback=&PL_sv_undef)
1064	PROTOTYPE: $;$
1065	ALIAS:
1066	aio_fsync = EIO_FSYNC
1067	aio_fdatasync = EIO_FDATASYNC
1068	PPCODE:
1069	{
1070	dREQ;
1071
1072	req->type = ix;
1073	req->sv1 = newSVsv (fh);
1074	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1075
1076	EIO_SEND (req);
1077	}
1078
1079	void
1080	aio_close (SV fh, SV callback=&PL_sv_undef)
1081	PROTOTYPE: $;$
1082	PPCODE:
1083	{
1084	dREQ;
1085
1086	req->type = EIO_CLOSE;
1087	req->sv1 = newSVsv (fh);
1088	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1089
1090	EIO_SEND (req);
1091	}
1092
1093	void
1094	aio_read (SV fh, SV offset, SV length, SV8 data, IV dataoffset, SV *callback=&PL_sv_undef)
1095	ALIAS:
1096	aio_read = EIO_READ
1097	aio_write = EIO_WRITE
1098	PROTOTYPE: $$$$$;$
1099	PPCODE:
1100	{
1101	STRLEN svlen;
1102	char *svptr = SvPVbyte (data, svlen);
1103	UV len = SvUV (length);
1104
1105	SvUPGRADE (data, SVt_PV);
1106	SvPOK_on (data);
1107
1108	if (dataoffset < 0)
1109	dataoffset += svlen;
1110
1111	if (dataoffset < 0 \|\| dataoffset > svlen)
1112	croak ("dataoffset outside of data scalar");
1113
1114	if (ix == EIO_WRITE)
1115	{
1116	/* write: check length and adjust. */
1117	if (!SvOK (length) \|\| len + dataoffset > svlen)
1118	len = svlen - dataoffset;
1119	}
1120	else
1121	{
1122	/* read: grow scalar as necessary */
1123	svptr = SvGROW (data, len + dataoffset + 1);
1124	}
1125
1126	if (len < 0)
1127	croak ("length must not be negative");
1128
1129	{	1197	{
1130	dREQ;	1198	struct timeval tv;
1131		1199
1132	req->type = ix;	1200	tv.tv_sec = req->nv1;
1133	req->sv1 = newSVsv (fh);	1201	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
1134	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1135	: IoOFP (sv_2io (fh)));
1136	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1137	req->size = len;
1138	req->sv2 = SvREFCNT_inc (data);
1139	req->ptr2 = (char *)svptr + dataoffset;
1140	req->stroffset = dataoffset;
1141		1202
1142	if (!SvREADONLY (data))	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.)
1143	{	1215	{
1144	SvREADONLY_on (data);	1216	tv[0].tv_sec = req->nv1;
1145	req->flags \|= FLAG_SV2_RO_OFF;	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;
1146	}	1222	}
		1223	else
		1224	times = 0;
1147		1225
1148	EIO_SEND;	1226
		1227	req->result = req->type == EIO_FUTIME
		1228	? futimes (req->int1, times)
		1229	: utimes (req->ptr1, times);
1149	}	1230	}
1150	}
1151		1231
1152	void	1232	case EIO_GROUP:
1153	aio_readlink (SV8 path, SV callback=&PL_sv_undef)	1233	abort (); /* handled in eio_request */
1154	PROTOTYPE: $$;$
1155	PPCODE:
1156	{
1157	SV *data;
1158	dREQ;
1159		1234
1160	data = newSV (NAME_MAX);	1235	case EIO_NOP:
1161	SvPOK_on (data);	1236	req->result = 0;
		1237	break;
1162		1238
1163	req->type = EIO_READLINK;	1239	case EIO_CUSTOM:
1164	req->sv1 = newSVsv (path);	1240	((void ()(eio_req ))req->feed) (req);
1165	req->ptr1 = SvPVbyte_nolen (req->sv1);	1241	break;
1166	req->sv2 = data;
1167	req->ptr2 = SvPVbyte_nolen (data);
1168		1242
1169	EIO_SEND;	1243	default:
1170	}	1244	req->result = -1;
		1245	break;
		1246	}
1171		1247
1172	void	1248	req->errorno = errno;
1173	aio_sendfile (SV out_fh, SV in_fh, SV in_offset, UV length, SV callback=&PL_sv_undef)
1174	PROTOTYPE: $$$$;$
1175	PPCODE:
1176	{
1177	dREQ;
1178
1179	req->type = EIO_SENDFILE;
1180	req->sv1 = newSVsv (out_fh);
1181	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1182	req->sv2 = newSVsv (in_fh);
1183	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1184	req->offs = SvVAL64 (in_offset);
1185	req->size = length;
1186
1187	EIO_SEND;
1188	}	1249	}
1189		1250
1190	void	1251	#ifndef EIO_NO_WRAPPERS
1191	aio_readahead (SV fh, SV offset, IV length, SV *callback=&PL_sv_undef)
1192	PROTOTYPE: $$$;$
1193	PPCODE:
1194	{
1195	dREQ;
1196		1252
1197	req->type = EIO_READAHEAD;	1253	eio_req eio_nop (int pri, eio_cb cb, void data)
1198	req->sv1 = newSVsv (fh);
1199	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1200	req->offs = SvVAL64 (offset);
1201	req->size = length;
1202
1203	EIO_SEND;
1204	}
1205
1206	void
1207	aio_stat (SV8 fh_or_path, SV callback=&PL_sv_undef)
1208	ALIAS:
1209	aio_stat = EIO_STAT
1210	aio_lstat = EIO_LSTAT
1211	PPCODE:
1212	{	1254	{
1213	dREQ;	1255	REQ (EIO_NOP); SEND;
		1256	}
1214		1257
1215	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));	1258	eio_req eio_busy (double delay, int pri, eio_cb cb, void data)
1216	if (!req->ptr2)	1259	{
1217	{	1260	REQ (EIO_BUSY); req->nv1 = delay; SEND;
1218	req_destroy (req);	1261	}
1219	croak ("out of memory during aio_stat statdata allocation");
1220	}
1221		1262
		1263	eio_req eio_sync (int pri, eio_cb cb, void data)
		1264	{
		1265	REQ (EIO_SYNC); SEND;
		1266	}
		1267
		1268	eio_req eio_fsync (int fd, int pri, eio_cb cb, void data)
		1269	{
		1270	REQ (EIO_FSYNC); req->int1 = fd; SEND;
		1271	}
		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
		1283	eio_req eio_fdatasync (int fd, int pri, eio_cb cb, void data)
		1284	{
		1285	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
		1286	}
		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
		1293	eio_req eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void data)
		1294	{
		1295	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
		1296	}
		1297
		1298	eio_req eio_read (int fd, void buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		1299	{
		1300	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		1301	}
		1302
		1303	eio_req eio_write (int fd, void buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		1304	{
		1305	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		1306	}
		1307
		1308	eio_req eio_fstat (int fd, int pri, eio_cb cb, void data)
		1309	{
		1310	REQ (EIO_FSTAT); req->int1 = fd; SEND;
		1311	}
		1312
		1313	eio_req eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void data)
		1314	{
		1315	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
		1316	}
		1317
		1318	eio_req eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void data)
		1319	{
		1320	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
		1321	}
		1322
		1323	eio_req eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void data)
		1324	{
		1325	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
		1326	}
		1327
		1328	eio_req eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void data)
		1329	{
		1330	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
		1331	}
		1332
		1333	eio_req eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void data)
		1334	{
		1335	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
		1336	}
		1337
		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)
		1339	{
		1340	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
		1341	}
		1342
		1343	eio_req eio_open (const char path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
		1344	{
		1345	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
		1346	}
		1347
		1348	eio_req eio_utime (const char path, double atime, double mtime, int pri, eio_cb cb, void *data)
		1349	{
		1350	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
		1351	}
		1352
		1353	eio_req eio_truncate (const char path, off_t offset, int pri, eio_cb cb, void *data)
		1354	{
		1355	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
		1356	}
		1357
		1358	eio_req eio_chown (const char path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
		1359	{
		1360	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
		1361	}
		1362
		1363	eio_req eio_chmod (const char path, mode_t mode, int pri, eio_cb cb, void *data)
		1364	{
		1365	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
		1366	}
		1367
		1368	eio_req eio_mkdir (const char path, mode_t mode, int pri, eio_cb cb, void *data)
		1369	{
		1370	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
		1371	}
		1372
		1373	static eio_req *
		1374	eio__1path (int type, const char path, int pri, eio_cb cb, void data)
		1375	{
		1376	REQ (type); PATH; SEND;
		1377	}
		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
		1404	eio_req eio_readdir (const char path, int pri, eio_cb cb, void *data)
		1405	{
		1406	return eio__1path (EIO_READDIR, path, pri, cb, data);
		1407	}
		1408
		1409	eio_req eio_mknod (const char path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
		1410	{
		1411	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int3 = (long)dev; SEND;
		1412	}
		1413
		1414	static eio_req *
		1415	eio__2path (int type, const char path, const char new_path, int pri, eio_cb cb, void *data)
		1416	{
		1417	REQ (type); PATH;
		1418
1222	req->flags \|= FLAG_PTR2_FREE;	1419	req->flags \|= EIO_FLAG_PTR2_FREE;
1223	req->sv1 = newSVsv (fh_or_path);	1420	req->ptr2 = strdup (new_path);
		1421	if (!req->ptr2)
		1422	{
		1423	eio_api_destroy (req);
		1424	return 0;
		1425	}
1224		1426
1225	if (SvPOK (fh_or_path))	1427	SEND;
1226	{
1227	req->type = ix;
1228	req->ptr1 = SvPVbyte_nolen (req->sv1);
1229	}
1230	else
1231	{
1232	req->type = EIO_FSTAT;
1233	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1234	}
1235
1236	EIO_SEND;
1237	}	1428	}
1238		1429
1239	void	1430	eio_req eio_link (const char path, const char new_path, int pri, eio_cb cb, void data)
1240	aio_utime (SV8 fh_or_path, SV atime, SV mtime, SV callback=&PL_sv_undef)
1241	PPCODE:
1242	{	1431	{
1243	dREQ;	1432	return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
1244
1245	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1246	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1247	req->sv1 = newSVsv (fh_or_path);
1248
1249	if (SvPOK (fh_or_path))
1250	{
1251	req->type = EIO_UTIME;
1252	req->ptr1 = SvPVbyte_nolen (req->sv1);
1253	}
1254	else
1255	{
1256	req->type = EIO_FUTIME;
1257	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1258	}
1259
1260	EIO_SEND;
1261	}	1433	}
1262		1434
1263	void	1435	eio_req eio_symlink (const char path, const char new_path, int pri, eio_cb cb, void data)
1264	aio_truncate (SV8 fh_or_path, SV offset, SV *callback=&PL_sv_undef)
1265	PPCODE:
1266	{	1436	{
1267	dREQ;	1437	return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
1268
1269	req->sv1 = newSVsv (fh_or_path);
1270	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1271
1272	if (SvPOK (fh_or_path))
1273	{
1274	req->type = EIO_TRUNCATE;
1275	req->ptr1 = SvPVbyte_nolen (req->sv1);
1276	}
1277	else
1278	{
1279	req->type = EIO_FTRUNCATE;
1280	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1281	}
1282
1283	EIO_SEND;
1284	}	1438	}
1285		1439
1286	void	1440	eio_req eio_rename (const char path, const char new_path, int pri, eio_cb cb, void data)
1287	aio_chmod (SV8 fh_or_path, int mode, SV callback=&PL_sv_undef)
1288	ALIAS:
1289	aio_chmod = EIO_CHMOD
1290	aio_fchmod = EIO_FCHMOD
1291	aio_mkdir = EIO_MKDIR
1292	PPCODE:
1293	{	1441	{
1294	dREQ;	1442	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
1295
1296	req->type = type;
1297	req->int2 = mode;
1298	req->sv1 = newSVsv (fh_or_path);
1299
1300	if (ix == EIO_FCHMOD)
1301	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1302	else
1303	req->ptr1 = SvPVbyte_nolen (req->sv1);
1304
1305	EIO_SEND;
1306	}	1443	}
1307		1444
1308	void	1445	eio_req eio_custom (eio_cb execute, int pri, eio_cb cb, void data)
1309	aio_chown (SV8 fh_or_path, SV uid, SV gid, SV callback=&PL_sv_undef)
1310	PPCODE:
1311	{	1446	{
1312	dREQ;	1447	REQ (EIO_CUSTOM); req->feed = (void ()(eio_req ))execute; SEND;
1313
1314	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1315	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1316	req->sv1 = newSVsv (fh_or_path);
1317
1318	if (SvPOK (fh_or_path))
1319	{
1320	req->type = EIO_CHOWN;
1321	req->ptr1 = SvPVbyte_nolen (req->sv1);
1322	}
1323	else
1324	{
1325	req->type = EIO_FCHOWN;
1326	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1327	}
1328
1329	EIO_SEND;
1330	}	1448	}
1331		1449
1332	void
1333	aio_unlink (SV8 pathname, SV callback=&PL_sv_undef)
1334	ALIAS:
1335	aio_unlink = EIO_UNLINK
1336	aio_rmdir = EIO_RMDIR
1337	aio_readdir = EIO_READDIR
1338	PPCODE:
1339	{
1340	dREQ;
1341
1342	req->type = ix;
1343	req->sv1 = newSVsv (pathname);
1344	req->ptr1 = SvPVbyte_nolen (req->sv1);
1345
1346	EIO_SEND;
1347	}
1348
1349	void
1350	aio_link (SV8 oldpath, SV8 newpath, SV *callback=&PL_sv_undef)
1351	ALIAS:
1352	aio_link = EIO_LINK
1353	aio_symlink = EIO_SYMLINK
1354	aio_rename = EIO_RENAME
1355	PPCODE:
1356	{
1357	dREQ;
1358
1359	req->type = ix;
1360	req->sv1 = newSVsv (oldpath);
1361	req->ptr1 = SvPVbyte_nolen (req->sv1);
1362	req->sv2 = newSVsv (newpath);
1363	req->ptr2 = SvPVbyte_nolen (req->sv2);
1364
1365	EIO_SEND;
1366	}
1367
1368	void
1369	aio_mknod (SV8 pathname, int mode, UV dev, SV callback=&PL_sv_undef)
1370	PPCODE:
1371	{
1372	dREQ;
1373
1374	req->type = EIO_MKNOD;
1375	req->sv1 = newSVsv (pathname);
1376	req->ptr1 = SvPVbyte_nolen (req->sv1);
1377	req->int2 = (mode_t)mode;
1378	req->offs = dev;
1379
1380	EIO_SEND;
1381	}
1382
1383	void
1384	aio_busy (double delay, SV *callback=&PL_sv_undef)
1385	PPCODE:
1386	{
1387	dREQ;
1388
1389	req->type = EIO_BUSY;
1390	req->nv1 = delay < 0. ? 0. : delay;
1391
1392	EIO_SEND;
1393	}
1394
1395	void
1396	aio_group (SV *callback=&PL_sv_undef)
1397	PROTOTYPE: ;$
1398	PPCODE:
1399	{
1400	dREQ;
1401
1402	req->type = EIO_GROUP;
1403
1404	req_send (req);
1405	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1406	}
1407
1408	void
1409	aio_nop (SV *callback=&PL_sv_undef)
1410	ALIAS:
1411	aio_nop = EIO_NOP
1412	aio_sync = EIO_SYNC
1413	PPCODE:
1414	{
1415	dREQ;
1416
1417	#endif	1450	#endif
		1451
		1452	eio_req eio_grp (eio_cb cb, void data)
		1453	{
		1454	const int pri = EIO_PRI_MAX;
		1455
		1456	REQ (EIO_GROUP); SEND;
		1457	}
		1458
		1459	#undef REQ
		1460	#undef PATH
		1461	#undef SEND
		1462
		1463	/*****************************************************************************/
		1464	/* grp functions */
1418		1465
1419	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)
1420	{	1467	{
1421	grp->int2 = limit;	1468	grp->int2 = limit;
1422	grp->feed = feed;	1469	grp->feed = feed;
…		…
1445	grp->grp_first->grp_prev = req;	1492	grp->grp_first->grp_prev = req;
1446		1493
1447	grp->grp_first = req;	1494	grp->grp_first = req;
1448	}	1495	}
1449		1496
		1497	/*****************************************************************************/
		1498	/* misc garbage */
1450		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 1.2 by root, Sat May 10 23:33:40 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 1.2 by root, Sat May 10 23:33:40 2008 UTC vs.
Revision 1.24 by root, Tue Sep 30 13:17:32 2008 UTC