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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 1.22 by root, Fri Jul 11 10:54:50 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	#define ETP_PRI_MIN EIO_PRI_MIN
		126	#define ETP_PRI_MAX EIO_PRI_MAX
		127
		128	struct etp_worker;
		129
		130	#define ETP_REQ eio_req
		131	#define ETP_DESTROY(req) eio_destroy (req)
		132	static int eio_finish (eio_req *req);
		133	#define ETP_FINISH(req) eio_finish (req)
		134	static void eio_execute (struct etp_worker *self, eio_req *req);
		135	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)
		136
		137	#define ETP_WORKER_CLEAR(req) \
		138	if (wrk->dbuf) \
		139	{ \
		140	free (wrk->dbuf); \
		141	wrk->dbuf = 0; \
		142	} \
		143	\
		144	if (wrk->dirp) \
		145	{ \
		146	closedir (wrk->dirp); \
		147	wrk->dirp = 0; \
		148	}
		149	#define ETP_WORKER_COMMON \
		150	void *dbuf; \
		151	DIR *dirp;
		152
		153	/*****************************************************************************/
		154
		155	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
		156
		157	/* calculcate time difference in ~1/EIO_TICKS of a second */
		158	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		159	{
		160	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
		161	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		162	}
		163
		164	static unsigned int started, idle, wanted = 4;
		165
90	static void (*want_poll_cb) (void);	166	static void (*want_poll_cb) (void);
91	static void (*done_poll_cb) (void);	167	static void (*done_poll_cb) (void);
92		168
93	static unsigned int max_poll_time = 0;	169	static unsigned int max_poll_time; /* reslock */
94	static unsigned int max_poll_reqs = 0;	170	static unsigned int max_poll_reqs; /* reslock */
95		171
96	/* calculcate time difference in ~1/EIO_TICKS of a second */	172	static volatile unsigned int nreqs; /* reqlock */
97	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	173	static volatile unsigned int nready; /* reqlock */
98	{	174	static volatile unsigned int npending; /* reqlock */
99	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	175	static volatile unsigned int max_idle = 4;
100	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
101	}
102		176
103	static unsigned int started, idle, wanted;
104
105	/* worker threads management */
106	static mutex_t wrklock = X_MUTEX_INIT;	177	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;	178	static mutex_t reslock = X_MUTEX_INIT;
149	static mutex_t reqlock = X_MUTEX_INIT;	179	static mutex_t reqlock = X_MUTEX_INIT;
150	static cond_t reqwait = X_COND_INIT;	180	static cond_t reqwait = X_COND_INIT;
151		181
		182	#if !HAVE_PREADWRITE
		183	/*
		184	* make our pread/pwrite emulation safe against themselves, but not against
		185	* normal read/write by using a mutex. slows down execution a lot,
		186	* but that's your problem, not mine.
		187	*/
		188	static mutex_t preadwritelock = X_MUTEX_INIT;
		189	#endif
		190
		191	typedef struct etp_worker
		192	{
		193	/* locked by wrklock */
		194	struct etp_worker *prev, *next;
		195
		196	thread_t tid;
		197
		198	/* locked by reslock, reqlock or wrklock */
		199	ETP_REQ *req; /* currently processed request */
		200
		201	ETP_WORKER_COMMON
		202	} etp_worker;
		203
		204	static etp_worker wrk_first = { &wrk_first, &wrk_first, 0 }; /* NOT etp */
		205
		206	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
		207	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
		208
		209	/* worker threads management */
		210
		211	static void etp_worker_clear (etp_worker *wrk)
		212	{
		213	ETP_WORKER_CLEAR (wrk);
		214	}
		215
		216	static void etp_worker_free (etp_worker *wrk)
		217	{
		218	wrk->next->prev = wrk->prev;
		219	wrk->prev->next = wrk->next;
		220
		221	free (wrk);
		222	}
		223
152	unsigned int eio_nreqs (void)	224	static unsigned int etp_nreqs (void)
153	{	225	{
		226	int retval;
		227	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		228	retval = nreqs;
		229	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
154	return nreqs;	230	return retval;
155	}	231	}
156		232
157	unsigned int eio_nready (void)	233	static unsigned int etp_nready (void)
158	{	234	{
159	unsigned int retval;	235	unsigned int retval;
160		236
161	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	237	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
162	retval = nready;	238	retval = nready;
163	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	239	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
164		240
165	return retval;	241	return retval;
166	}	242	}
167		243
168	unsigned int eio_npending (void)	244	static unsigned int etp_npending (void)
169	{	245	{
170	unsigned int retval;	246	unsigned int retval;
171		247
172	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	248	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
173	retval = npending;	249	retval = npending;
174	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	250	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
175		251
176	return retval;	252	return retval;
177	}	253	}
178		254
179	unsigned int eio_nthreads (void)	255	static unsigned int etp_nthreads (void)
180	{	256	{
181	unsigned int retval;	257	unsigned int retval;
182		258
183	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	259	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
184	retval = started;	260	retval = started;
…		…
191	* a somewhat faster data structure might be nice, but	267	* a somewhat faster data structure might be nice, but
192	* with 8 priorities this actually needs <20 insns	268	* with 8 priorities this actually needs <20 insns
193	* per shift, the most expensive operation.	269	* per shift, the most expensive operation.
194	*/	270	*/
195	typedef struct {	271	typedef struct {
196	eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */	272	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
197	int size;	273	int size;
198	} reqq;	274	} etp_reqq;
199		275
200	static reqq req_queue;	276	static etp_reqq req_queue;
201	static reqq res_queue;	277	static etp_reqq res_queue;
202		278
203	static int reqq_push (reqq *q, eio_req *req)	279	static int reqq_push (etp_reqq *q, ETP_REQ *req)
204	{	280	{
205	int pri = req->pri;	281	int pri = req->pri;
206	req->next = 0;	282	req->next = 0;
207		283
208	if (q->qe[pri])	284	if (q->qe[pri])
…		…
214	q->qe[pri] = q->qs[pri] = req;	290	q->qe[pri] = q->qs[pri] = req;
215		291
216	return q->size++;	292	return q->size++;
217	}	293	}
218		294
219	static eio_req *reqq_shift (reqq *q)	295	static ETP_REQ *reqq_shift (etp_reqq *q)
220	{	296	{
221	int pri;	297	int pri;
222		298
223	if (!q->size)	299	if (!q->size)
224	return 0;	300	return 0;
225		301
226	--q->size;	302	--q->size;
227		303
228	for (pri = EIO_NUM_PRI; pri--; )	304	for (pri = ETP_NUM_PRI; pri--; )
229	{	305	{
230	eio_req *req = q->qs[pri];	306	eio_req *req = q->qs[pri];
231		307
232	if (req)	308	if (req)
233	{	309	{
…		…
239	}	315	}
240		316
241	abort ();	317	abort ();
242	}	318	}
243		319
244	static void grp_try_feed (eio_req *grp)	320	static void etp_atfork_prepare (void)
245	{	321	{
246	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	322	X_LOCK (wrklock);
		323	X_LOCK (reqlock);
		324	X_LOCK (reslock);
		325	#if !HAVE_PREADWRITE
		326	X_LOCK (preadwritelock);
		327	#endif
		328	}
		329
		330	static void etp_atfork_parent (void)
		331	{
		332	#if !HAVE_PREADWRITE
		333	X_UNLOCK (preadwritelock);
		334	#endif
		335	X_UNLOCK (reslock);
		336	X_UNLOCK (reqlock);
		337	X_UNLOCK (wrklock);
		338	}
		339
		340	static void etp_atfork_child (void)
		341	{
		342	ETP_REQ *prv;
		343
		344	while ((prv = reqq_shift (&req_queue)))
		345	ETP_DESTROY (prv);
		346
		347	while ((prv = reqq_shift (&res_queue)))
		348	ETP_DESTROY (prv);
		349
		350	while (wrk_first.next != &wrk_first)
247	{	351	{
248	int old_len = grp->size;	352	etp_worker *wrk = wrk_first.next;
249		353
250	EIO_FEED (grp);	354	if (wrk->req)
		355	ETP_DESTROY (wrk->req);
251		356
252	/* stop if no progress has been made */	357	etp_worker_clear (wrk);
253	if (old_len == grp->size)	358	etp_worker_free (wrk);
254	{
255	grp->feed = 0;
256	break;
257	}
258	}	359	}
259	}
260		360
261	static int eio_finish (eio_req *req);	361	started = 0;
		362	idle = 0;
		363	nreqs = 0;
		364	nready = 0;
		365	npending = 0;
262		366
263	static int grp_dec (eio_req *grp)	367	etp_atfork_parent ();
264	{	368	}
265	--grp->size;
266		369
267	/* call feeder, if applicable */	370	static void
268	grp_try_feed (grp);	371	etp_once_init (void)
		372	{
		373	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
		374	}
269		375
270	/* finish, if done */	376	static int
271	if (!grp->size && grp->int1)	377	etp_init (void (*want_poll)(void), void (*done_poll)(void))
272	return eio_finish (grp);	378	{
273	else	379	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
		380
		381	pthread_once (&doinit, etp_once_init);
		382
		383	want_poll_cb = want_poll;
		384	done_poll_cb = done_poll;
		385
274	return 0;	386	return 0;
275	}	387	}
276		388
277	void eio_destroy (eio_req *req)
278	{
279	if ((req)->flags & EIO_FLAG_PTR2_FREE)
280	free (req->ptr2);
281
282	EIO_DESTROY (req);
283	}
284
285	static int eio_finish (eio_req *req)
286	{
287	int res = EIO_FINISH (req);
288
289	if (req->grp)
290	{
291	int res2;
292	eio_req *grp = req->grp;
293
294	/* unlink request */
295	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
296	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
297
298	if (grp->grp_first == req)
299	grp->grp_first = req->grp_next;
300
301	res2 = grp_dec (grp);
302
303	if (!res && res2)
304	res = res2;
305	}
306
307	eio_destroy (req);
308
309	return res;
310	}
311
312	void eio_grp_cancel (eio_req *grp)
313	{
314	for (grp = grp->grp_first; grp; grp = grp->grp_next)
315	eio_cancel (grp);
316	}
317
318	void eio_cancel (eio_req *req)
319	{
320	req->flags |= EIO_FLAG_CANCELLED;
321
322	eio_grp_cancel (req);
323	}
324
325	X_THREAD_PROC (eio_proc);	389	X_THREAD_PROC (etp_proc);
326		390
327	static void start_thread (void)	391	static void etp_start_thread (void)
328	{	392	{
329	worker *wrk = calloc (1, sizeof (worker));	393	etp_worker *wrk = calloc (1, sizeof (etp_worker));
330		394
331	if (!wrk)	395	/*TODO*/
332	croak ("unable to allocate worker thread data");	396	assert (("unable to allocate worker thread data", wrk));
333		397
334	X_LOCK (wrklock);	398	X_LOCK (wrklock);
335		399
336	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))	400	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
337	{	401	{
338	wrk->prev = &wrk_first;	402	wrk->prev = &wrk_first;
339	wrk->next = wrk_first.next;	403	wrk->next = wrk_first.next;
340	wrk_first.next->prev = wrk;	404	wrk_first.next->prev = wrk;
341	wrk_first.next = wrk;	405	wrk_first.next = wrk;
…		…
345	free (wrk);	409	free (wrk);
346		410
347	X_UNLOCK (wrklock);	411	X_UNLOCK (wrklock);
348	}	412	}
349		413
350	static void maybe_start_thread (void)	414	static void etp_maybe_start_thread (void)
351	{	415	{
352	if (eio_nthreads () >= wanted)	416	if (etp_nthreads () >= wanted)
353	return;	417	return;
354		418
355	/* todo: maybe use idle here, but might be less exact */	419	/* todo: maybe use idle here, but might be less exact */
356	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())	420	if (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ())
357	return;	421	return;
358		422
359	start_thread ();	423	etp_start_thread ();
360	}	424	}
361		425
362	void eio_submit (eio_req *req)
363	{
364	++nreqs;
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	}
374
375	static void end_thread (void)	426	static void etp_end_thread (void)
376	{	427	{
377	eio_req *req = calloc (1, sizeof (eio_req));	428	eio_req *req = calloc (1, sizeof (eio_req));
378		429
379	req->type = EIO_QUIT;	430	req->type = -1;
380	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	431	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
381		432
382	X_LOCK (reqlock);	433	X_LOCK (reqlock);
383	reqq_push (&req_queue, req);	434	reqq_push (&req_queue, req);
384	X_COND_SIGNAL (reqwait);	435	X_COND_SIGNAL (reqwait);
385	X_UNLOCK (reqlock);	436	X_UNLOCK (reqlock);
…		…
387	X_LOCK (wrklock);	438	X_LOCK (wrklock);
388	--started;	439	--started;
389	X_UNLOCK (wrklock);	440	X_UNLOCK (wrklock);
390	}	441	}
391		442
392	void eio_set_max_poll_time (double nseconds)
393	{
394	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
395	max_poll_time = nseconds;
396	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
397	}
398
399	void eio_set_max_poll_reqs (unsigned int maxreqs)
400	{
401	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
402	max_poll_reqs = maxreqs;
403	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
404	}
405
406	void eio_set_max_idle (unsigned int nthreads)
407	{
408	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
409	max_idle = nthreads <= 0 ? 1 : nthreads;
410	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
411	}
412
413	void eio_set_min_parallel (unsigned int nthreads)
414	{
415	if (wanted < nthreads)
416	wanted = nthreads;
417	}
418
419	void eio_set_max_parallel (unsigned int nthreads)
420	{
421	if (wanted > nthreads)
422	wanted = nthreads;
423
424	while (started > wanted)
425	end_thread ();
426	}
427
428	int eio_poll (void)	443	static int etp_poll (void)
429	{	444	{
430	int maxreqs = max_poll_reqs;	445	unsigned int maxreqs;
		446	unsigned int maxtime;
431	struct timeval tv_start, tv_now;	447	struct timeval tv_start, tv_now;
432	eio_req *req;
433		448
		449	X_LOCK (reslock);
		450	maxreqs = max_poll_reqs;
		451	maxtime = max_poll_time;
		452	X_UNLOCK (reslock);
		453
434	if (max_poll_time)	454	if (maxtime)
435	gettimeofday (&tv_start, 0);	455	gettimeofday (&tv_start, 0);
436		456
437	for (;;)	457	for (;;)
438	{	458	{
		459	ETP_REQ *req;
		460
439	maybe_start_thread ();	461	etp_maybe_start_thread ();
440		462
441	X_LOCK (reslock);	463	X_LOCK (reslock);
442	req = reqq_shift (&res_queue);	464	req = reqq_shift (&res_queue);
443		465
444	if (req)	466	if (req)
…		…
452	X_UNLOCK (reslock);	474	X_UNLOCK (reslock);
453		475
454	if (!req)	476	if (!req)
455	return 0;	477	return 0;
456		478
		479	X_LOCK (reqlock);
457	--nreqs;	480	--nreqs;
		481	X_UNLOCK (reqlock);
458		482
459	if (req->type == EIO_GROUP && req->size)	483	if (req->type == EIO_GROUP && req->size)
460	{	484	{
461	req->int1 = 1; /* mark request as delayed */	485	req->int1 = 1; /* mark request as delayed */
462	continue;	486	continue;
463	}	487	}
464	else	488	else
465	{	489	{
466	int res = eio_finish (req);	490	int res = ETP_FINISH (req);
467	if (res)	491	if (res)
468	return res;	492	return res;
469	}	493	}
470		494
471	if (maxreqs && !--maxreqs)	495	if (maxreqs && !--maxreqs)
472	break;	496	break;
473		497
474	if (max_poll_time)	498	if (maxtime)
475	{	499	{
476	gettimeofday (&tv_now, 0);	500	gettimeofday (&tv_now, 0);
477		501
478	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)	502	if (tvdiff (&tv_start, &tv_now) >= maxtime)
479	break;	503	break;
480	}	504	}
481	}	505	}
482		506
483	errno = EAGAIN;	507	errno = EAGAIN;
484	return -1;	508	return -1;
485	}	509	}
486		510
		511	static void etp_cancel (ETP_REQ *req)
		512	{
		513	X_LOCK (wrklock);
		514	req->flags |= EIO_FLAG_CANCELLED;
		515	X_UNLOCK (wrklock);
		516
		517	eio_grp_cancel (req);
		518	}
		519
		520	static void etp_submit (ETP_REQ *req)
		521	{
		522	req->pri -= ETP_PRI_MIN;
		523
		524	if (req->pri < ETP_PRI_MIN - ETP_PRI_MIN) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
		525	if (req->pri > ETP_PRI_MAX - ETP_PRI_MIN) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
		526
		527	X_LOCK (reqlock);
		528	++nreqs;
		529	++nready;
		530	reqq_push (&req_queue, req);
		531	X_COND_SIGNAL (reqwait);
		532	X_UNLOCK (reqlock);
		533
		534	etp_maybe_start_thread ();
		535	}
		536
		537	static void etp_set_max_poll_time (double nseconds)
		538	{
		539	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		540	max_poll_time = nseconds;
		541	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		542	}
		543
		544	static void etp_set_max_poll_reqs (unsigned int maxreqs)
		545	{
		546	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		547	max_poll_reqs = maxreqs;
		548	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		549	}
		550
		551	static void etp_set_max_idle (unsigned int nthreads)
		552	{
		553	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		554	max_idle = nthreads <= 0 ? 1 : nthreads;
		555	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		556	}
		557
		558	static void etp_set_min_parallel (unsigned int nthreads)
		559	{
		560	if (wanted < nthreads)
		561	wanted = nthreads;
		562	}
		563
		564	static void etp_set_max_parallel (unsigned int nthreads)
		565	{
		566	if (wanted > nthreads)
		567	wanted = nthreads;
		568
		569	while (started > wanted)
		570	etp_end_thread ();
		571	}
		572
		573	/*****************************************************************************/
		574
		575	static void grp_try_feed (eio_req *grp)
		576	{
		577	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
		578	{
		579	int old_len = grp->size;
		580
		581	EIO_FEED (grp);
		582
		583	/* stop if no progress has been made */
		584	if (old_len == grp->size)
		585	{
		586	grp->feed = 0;
		587	break;
		588	}
		589	}
		590	}
		591
		592	static int grp_dec (eio_req *grp)
		593	{
		594	--grp->size;
		595
		596	/* call feeder, if applicable */
		597	grp_try_feed (grp);
		598
		599	/* finish, if done */
		600	if (!grp->size && grp->int1)
		601	return eio_finish (grp);
		602	else
		603	return 0;
		604	}
		605
		606	void eio_destroy (eio_req *req)
		607	{
		608	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
		609	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
		610
		611	EIO_DESTROY (req);
		612	}
		613
		614	static int eio_finish (eio_req *req)
		615	{
		616	int res = EIO_FINISH (req);
		617
		618	if (req->grp)
		619	{
		620	int res2;
		621	eio_req *grp = req->grp;
		622
		623	/* unlink request */
		624	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		625	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		626
		627	if (grp->grp_first == req)
		628	grp->grp_first = req->grp_next;
		629
		630	res2 = grp_dec (grp);
		631
		632	if (!res && res2)
		633	res = res2;
		634	}
		635
		636	eio_destroy (req);
		637
		638	return res;
		639	}
		640
		641	void eio_grp_cancel (eio_req *grp)
		642	{
		643	for (grp = grp->grp_first; grp; grp = grp->grp_next)
		644	eio_cancel (grp);
		645	}
		646
		647	void eio_cancel (eio_req *req)
		648	{
		649	etp_cancel (req);
		650	}
		651
		652	void eio_submit (eio_req *req)
		653	{
		654	etp_submit (req);
		655	}
		656
		657	unsigned int eio_nreqs (void)
		658	{
		659	return etp_nreqs ();
		660	}
		661
		662	unsigned int eio_nready (void)
		663	{
		664	return etp_nready ();
		665	}
		666
		667	unsigned int eio_npending (void)
		668	{
		669	return etp_npending ();
		670	}
		671
		672	unsigned int eio_nthreads (void)
		673	{
		674	return etp_nthreads ();
		675	}
		676
		677	void eio_set_max_poll_time (double nseconds)
		678	{
		679	etp_set_max_poll_time (nseconds);
		680	}
		681
		682	void eio_set_max_poll_reqs (unsigned int maxreqs)
		683	{
		684	etp_set_max_poll_reqs (maxreqs);
		685	}
		686
		687	void eio_set_max_idle (unsigned int nthreads)
		688	{
		689	etp_set_max_idle (nthreads);
		690	}
		691
		692	void eio_set_min_parallel (unsigned int nthreads)
		693	{
		694	etp_set_min_parallel (nthreads);
		695	}
		696
		697	void eio_set_max_parallel (unsigned int nthreads)
		698	{
		699	etp_set_max_parallel (nthreads);
		700	}
		701
		702	int eio_poll (void)
		703	{
		704	return etp_poll ();
		705	}
		706
487	/*****************************************************************************/	707	/*****************************************************************************/
488	/* work around various missing functions */	708	/* work around various missing functions */
489		709
490	#if !HAVE_PREADWRITE	710	#if !HAVE_PREADWRITE
491	# define pread aio_pread	711	# define pread eio__pread
492	# define pwrite aio_pwrite	712	# define pwrite eio__pwrite
493		713
494	/*	714	static ssize_t
495	* make our pread/pwrite safe against themselves, but not against	715	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	{	716	{
503	ssize_t res;	717	ssize_t res;
504	off_t ooffset;	718	off_t ooffset;
505		719
506	X_LOCK (preadwritelock);	720	X_LOCK (preadwritelock);
…		…
511	X_UNLOCK (preadwritelock);	725	X_UNLOCK (preadwritelock);
512		726
513	return res;	727	return res;
514	}	728	}
515		729
516	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	730	static ssize_t
		731	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
517	{	732	{
518	ssize_t res;	733	ssize_t res;
519	off_t ooffset;	734	off_t ooffset;
520		735
521	X_LOCK (preadwritelock);	736	X_LOCK (preadwritelock);
…		…
529	}	744	}
530	#endif	745	#endif
531		746
532	#ifndef HAVE_FUTIMES	747	#ifndef HAVE_FUTIMES
533		748
534	# define utimes(path,times) aio_utimes (path, times)	749	# define utimes(path,times) eio__utimes (path, times)
535	# define futimes(fd,times) aio_futimes (fd, times)	750	# define futimes(fd,times) eio__futimes (fd, times)
536		751
		752	static int
537	static int aio_utimes (const char *filename, const struct timeval times[2])	753	eio__utimes (const char *filename, const struct timeval times[2])
538	{	754	{
539	if (times)	755	if (times)
540	{	756	{
541	struct utimbuf buf;	757	struct utimbuf buf;
542		758
…		…
547	}	763	}
548	else	764	else
549	return utime (filename, 0);	765	return utime (filename, 0);
550	}	766	}
551		767
552	static int aio_futimes (int fd, const struct timeval tv[2])	768	static int eio__futimes (int fd, const struct timeval tv[2])
553	{	769	{
554	errno = ENOSYS;	770	errno = ENOSYS;
555	return -1;	771	return -1;
556	}	772	}
557		773
…		…
560	#if !HAVE_FDATASYNC	776	#if !HAVE_FDATASYNC
561	# define fdatasync fsync	777	# define fdatasync fsync
562	#endif	778	#endif
563		779
564	#if !HAVE_READAHEAD	780	#if !HAVE_READAHEAD
565	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	781	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
566		782
		783	static ssize_t
567	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)	784	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
568	{	785	{
569	size_t todo = count;	786	size_t todo = count;
570	dBUF;	787	dBUF;
571		788
572	while (todo > 0)	789	while (todo > 0)
573	{	790	{
574	size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE;	791	size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE;
575		792
576	pread (fd, aio_buf, len, offset);	793	pread (fd, eio_buf, len, offset);
577	offset += len;	794	offset += len;
578	todo -= len;	795	todo -= len;
579	}	796	}
580		797
581	errno = 0;	798	errno = 0;
582	return count;	799	return count;
583	}	800	}
584		801
585	#endif	802	#endif
586		803
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 */	804	/* sendfile always needs emulation */
		805	static ssize_t
618	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)	806	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)
619	{	807	{
620	ssize_t res;	808	ssize_t res;
621		809
622	if (!count)	810	if (!count)
623	return 0;	811	return 0;
…		…
706		894
707	return res;	895	return res;
708	}	896	}
709		897
710	/* read a full directory */	898	/* read a full directory */
		899	static void
711	static void scandir_ (eio_req *req, worker *self)	900	eio__scandir (eio_req *req, etp_worker *self)
712	{	901	{
713	DIR *dirp;	902	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;	903	EIO_STRUCT_DIRENT *entp;
720	char *name, *names;	904	char *name, *names;
721	int memlen = 4096;	905	int memlen = 4096;
722	int memofs = 0;	906	int memofs = 0;
723	int res = 0;	907	int res = 0;
724		908
725	X_LOCK (wrklock);	909	X_LOCK (wrklock);
		910	/* the corresponding closedir is in ETP_WORKER_CLEAR */
726	self->dirp = dirp = opendir (req->ptr1);	911	self->dirp = dirp = opendir (req->ptr1);
727	self->dbuf = u = malloc (sizeof (*u));
728	req->flags |= EIO_FLAG_PTR2_FREE;	912	req->flags |= EIO_FLAG_PTR2_FREE;
729	req->ptr2 = names = malloc (memlen);	913	req->ptr2 = names = malloc (memlen);
730	X_UNLOCK (wrklock);	914	X_UNLOCK (wrklock);
731		915
732	if (dirp && u && names)	916	if (dirp && names)
733	for (;;)	917	for (;;)
734	{	918	{
735	errno = 0;	919	errno = 0;
736	readdir_r (dirp, &u->d, &entp);	920	entp = readdir (dirp);
737		921
738	if (!entp)	922	if (!entp)
739	break;	923	break;
740		924
741	name = entp->d_name;	925	name = entp->d_name;
…		…
768	req->result = res;	952	req->result = res;
769	}	953	}
770		954
771	/*****************************************************************************/	955	/*****************************************************************************/
772		956
		957	#define ALLOC(len) \
		958	if (!req->ptr2) \
		959	{ \
		960	X_LOCK (wrklock); \
		961	req->flags |= EIO_FLAG_PTR2_FREE; \
		962	X_UNLOCK (wrklock); \
		963	req->ptr2 = malloc (len); \
		964	if (!req->ptr2) \
		965	{ \
		966	errno = ENOMEM; \
		967	req->result = -1; \
		968	break; \
		969	} \
		970	}
		971
773	X_THREAD_PROC (eio_proc)	972	X_THREAD_PROC (etp_proc)
774	{	973	{
775	eio_req *req;	974	ETP_REQ *req;
776	struct timespec ts;	975	struct timespec ts;
777	worker *self = (worker *)thr_arg;	976	etp_worker *self = (etp_worker *)thr_arg;
778		977
779	/* try to distribute timeouts somewhat randomly */	978	/* try to distribute timeouts somewhat randomly */
780	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	979	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
781		980
782	for (;;)	981	for (;;)
783	{	982	{
784	ts.tv_sec = time (0) + IDLE_TIMEOUT;
785
786	X_LOCK (reqlock);	983	X_LOCK (reqlock);
787		984
788	for (;;)	985	for (;;)
789	{	986	{
790	self->req = req = reqq_shift (&req_queue);	987	self->req = req = reqq_shift (&req_queue);
…		…
792	if (req)	989	if (req)
793	break;	990	break;
794		991
795	++idle;	992	++idle;
796		993
		994	ts.tv_sec = time (0) + IDLE_TIMEOUT;
797	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	995	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
798	{	996	{
799	if (idle > max_idle)	997	if (idle > max_idle)
800	{	998	{
801	--idle;	999	--idle;
…		…
806	goto quit;	1004	goto quit;
807	}	1005	}
808		1006
809	/* we are allowed to idle, so do so without any timeout */	1007	/* we are allowed to idle, so do so without any timeout */
810	X_COND_WAIT (reqwait, reqlock);	1008	X_COND_WAIT (reqwait, reqlock);
811	ts.tv_sec = time (0) + IDLE_TIMEOUT;
812	}	1009	}
813		1010
814	--idle;	1011	--idle;
815	}	1012	}
816		1013
817	--nready;	1014	--nready;
818		1015
819	X_UNLOCK (reqlock);	1016	X_UNLOCK (reqlock);
820		1017
821	errno = 0; /* strictly unnecessary */	1018	if (req->type < 0)
		1019	goto quit;
822		1020
823	if (!EIO_CANCELLED (req))	1021	if (!EIO_CANCELLED (req))
824	switch (req->type)	1022	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		1023
918	X_LOCK (reslock);	1024	X_LOCK (reslock);
919		1025
920	++npending;	1026	++npending;
921		1027
922	if (!reqq_push (&res_queue, req) && want_poll_cb)	1028	if (!reqq_push (&res_queue, req) && want_poll_cb)
923	want_poll_cb ();	1029	want_poll_cb ();
924		1030
925	self->req = 0;	1031	self->req = 0;
926	worker_clear (self);	1032	etp_worker_clear (self);
927		1033
928	X_UNLOCK (reslock);	1034	X_UNLOCK (reslock);
929	}	1035	}
930		1036
931	quit:	1037	quit:
932	X_LOCK (wrklock);	1038	X_LOCK (wrklock);
933	worker_free (self);	1039	etp_worker_free (self);
934	X_UNLOCK (wrklock);	1040	X_UNLOCK (wrklock);
935		1041
936	return 0;	1042	return 0;
937	}	1043	}
938		1044
939	/*****************************************************************************/	1045	/*****************************************************************************/
940		1046
941	static void eio_atfork_prepare (void)	1047	int eio_init (void (*want_poll)(void), void (*done_poll)(void))
942	{	1048	{
943	X_LOCK (wrklock);	1049	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	}	1050	}
953		1051
954	static void eio_atfork_parent (void)	1052	static void eio_api_destroy (eio_req *req)
955	{	1053	{
956	#if !HAVE_READDIR_R	1054	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	}	1055	}
966		1056
967	static void eio_atfork_child (void)	1057	#define REQ(rtype) \
968	{	1058	eio_req *req; \
969	eio_req *prv;	1059	\
		1060	req = (eio_req *)calloc (1, sizeof *req); \
		1061	if (!req) \
		1062	return 0; \
		1063	\
		1064	req->type = rtype; \
		1065	req->pri = pri; \
		1066	req->finish = cb; \
		1067	req->data = data; \
		1068	req->destroy = eio_api_destroy;
970		1069
971	while (prv = reqq_shift (&req_queue))	1070	#define SEND eio_submit (req); return req
972	eio_destroy (prv);
973		1071
974	while (prv = reqq_shift (&res_queue))	1072	#define PATH \
975	eio_destroy (prv);	1073	req->flags |= EIO_FLAG_PTR1_FREE; \
		1074	req->ptr1 = strdup (path); \
		1075	if (!req->ptr1) \
		1076	{ \
		1077	eio_api_destroy (req); \
		1078	return 0; \
		1079	}
976		1080
977	while (wrk_first.next != &wrk_first)	1081	static void eio_execute (etp_worker *self, eio_req *req)
		1082	{
		1083	errno = 0;
		1084
		1085	switch (req->type)
978	{	1086	{
979	worker *wrk = wrk_first.next;	1087	case EIO_READ: ALLOC (req->size);
		1088	req->result = req->offs >= 0
		1089	? pread (req->int1, req->ptr2, req->size, req->offs)
		1090	: read (req->int1, req->ptr2, req->size); break;
		1091	case EIO_WRITE: req->result = req->offs >= 0
		1092	? pwrite (req->int1, req->ptr2, req->size, req->offs)
		1093	: write (req->int1, req->ptr2, req->size); break;
980		1094
981	if (wrk->req)	1095	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
982	eio_destroy (wrk->req);	1096	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break;
983		1097
984	worker_clear (wrk);	1098	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
985	worker_free (wrk);	1099	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
986	}	1100	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1101	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1102	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1103	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
987		1104
988	started = 0;	1105	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
989	idle = 0;	1106	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
990	nreqs = 0;	1107	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
991	nready = 0;	1108	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
992	npending = 0;	1109	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		1110	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
993		1111
994	eio_atfork_parent ();	1112	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
995	}	1113	case EIO_CLOSE: req->result = close (req->int1); break;
		1114	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
		1115	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
		1116	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
		1117	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
		1118	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
		1119	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
		1120	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
		1121	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->int3); break;
996		1122
997	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	1123	case EIO_READLINK: ALLOC (NAME_MAX);
998	{	1124	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
999	want_poll_cb = want_poll;
1000	done_poll_cb = done_poll;
1001		1125
		1126	case EIO_SYNC: req->result = 0; sync (); break;
		1127	case EIO_FSYNC: req->result = fsync (req->int1); break;
		1128	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		1129
		1130	case EIO_READDIR: eio__scandir (req, self); break;
		1131
		1132	case EIO_BUSY:
1002	#ifdef _WIN32	1133	#ifdef _WIN32
1003	X_MUTEX_CHECK (wrklock);	1134	Sleep (req->nv1 * 1000.);
1004	X_MUTEX_CHECK (reslock);	1135	#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	{	1136	{
1130	dREQ;	1137	struct timeval tv;
1131		1138
1132	req->type = ix;	1139	tv.tv_sec = req->nv1;
1133	req->sv1 = newSVsv (fh);	1140	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		1141
1142	if (!SvREADONLY (data))	1142	req->result = select (0, 0, 0, 0, &tv);
		1143	}
		1144	#endif
		1145	break;
		1146
		1147	case EIO_UTIME:
		1148	case EIO_FUTIME:
		1149	{
		1150	struct timeval tv[2];
		1151	struct timeval *times;
		1152
		1153	if (req->nv1 != -1. || req->nv2 != -1.)
1143	{	1154	{
1144	SvREADONLY_on (data);	1155	tv[0].tv_sec = req->nv1;
1145	req->flags |= FLAG_SV2_RO_OFF;	1156	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1157	tv[1].tv_sec = req->nv2;
		1158	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1159
		1160	times = tv;
1146	}	1161	}
		1162	else
		1163	times = 0;
1147		1164
1148	EIO_SEND;	1165
		1166	req->result = req->type == EIO_FUTIME
		1167	? futimes (req->int1, times)
		1168	: utimes (req->ptr1, times);
1149	}	1169	}
1150	}
1151		1170
1152	void	1171	case EIO_GROUP:
1153	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)	1172	case EIO_NOP:
1154	PROTOTYPE: $$;$	1173	req->result = 0;
1155	PPCODE:	1174	break;
1156	{
1157	SV *data;
1158	dREQ;
1159		1175
1160	data = newSV (NAME_MAX);	1176	case EIO_CUSTOM:
1161	SvPOK_on (data);	1177	req->feed (req);
		1178	break;
1162		1179
1163	req->type = EIO_READLINK;	1180	default:
1164	req->sv1 = newSVsv (path);	1181	req->result = -1;
1165	req->ptr1 = SvPVbyte_nolen (req->sv1);	1182	break;
1166	req->sv2 = data;	1183	}
1167	req->ptr2 = SvPVbyte_nolen (data);
1168		1184
1169	EIO_SEND;	1185	req->errorno = errno;
1170	}	1186	}
1171		1187
1172	void	1188	#ifndef EIO_NO_WRAPPERS
1173	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1174	PROTOTYPE: $$$$;$
1175	PPCODE:
1176	{
1177	dREQ;
1178		1189
1179	req->type = EIO_SENDFILE;	1190	eio_req *eio_nop (int pri, eio_cb cb, void *data)
1180	req->sv1 = newSVsv (out_fh);
1181	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1182	req->sv2 = newSVsv (in_fh);
1183	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1184	req->offs = SvVAL64 (in_offset);
1185	req->size = length;
1186
1187	EIO_SEND;
1188	}
1189
1190	void
1191	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1192	PROTOTYPE: $$$;$
1193	PPCODE:
1194	{	1191	{
1195	dREQ;	1192	REQ (EIO_NOP); SEND;
1196
1197	req->type = EIO_READAHEAD;
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	}	1193	}
1205		1194
1206	void	1195	eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
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	{	1196	{
1213	dREQ;	1197	REQ (EIO_BUSY); req->nv1 = delay; SEND;
		1198	}
1214		1199
1215	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));	1200	eio_req *eio_sync (int pri, eio_cb cb, void *data)
1216	if (!req->ptr2)	1201	{
1217	{	1202	REQ (EIO_SYNC); SEND;
1218	req_destroy (req);	1203	}
1219	croak ("out of memory during aio_stat statdata allocation");
1220	}
1221		1204
		1205	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
		1206	{
		1207	REQ (EIO_FSYNC); req->int1 = fd; SEND;
		1208	}
		1209
		1210	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
		1211	{
		1212	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
		1213	}
		1214
		1215	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
		1216	{
		1217	REQ (EIO_CLOSE); req->int1 = fd; SEND;
		1218	}
		1219
		1220	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
		1221	{
		1222	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
		1223	}
		1224
		1225	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		1226	{
		1227	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		1228	}
		1229
		1230	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		1231	{
		1232	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		1233	}
		1234
		1235	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
		1236	{
		1237	REQ (EIO_FSTAT); req->int1 = fd; SEND;
		1238	}
		1239
		1240	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
		1241	{
		1242	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
		1243	}
		1244
		1245	eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
		1246	{
		1247	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
		1248	}
		1249
		1250	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
		1251	{
		1252	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
		1253	}
		1254
		1255	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
		1256	{
		1257	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
		1258	}
		1259
		1260	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
		1261	{
		1262	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
		1263	}
		1264
		1265	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data)
		1266	{
		1267	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
		1268	}
		1269
		1270	eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
		1271	{
		1272	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
		1273	}
		1274
		1275	eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
		1276	{
		1277	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
		1278	}
		1279
		1280	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
		1281	{
		1282	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
		1283	}
		1284
		1285	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
		1286	{
		1287	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
		1288	}
		1289
		1290	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
		1291	{
		1292	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
		1293	}
		1294
		1295	eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
		1296	{
		1297	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
		1298	}
		1299
		1300	static eio_req *
		1301	eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
		1302	{
		1303	REQ (type); PATH; SEND;
		1304	}
		1305
		1306	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
		1307	{
		1308	return eio__1path (EIO_READLINK, path, pri, cb, data);
		1309	}
		1310
		1311	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
		1312	{
		1313	return eio__1path (EIO_STAT, path, pri, cb, data);
		1314	}
		1315
		1316	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
		1317	{
		1318	return eio__1path (EIO_LSTAT, path, pri, cb, data);
		1319	}
		1320
		1321	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
		1322	{
		1323	return eio__1path (EIO_UNLINK, path, pri, cb, data);
		1324	}
		1325
		1326	eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
		1327	{
		1328	return eio__1path (EIO_RMDIR, path, pri, cb, data);
		1329	}
		1330
		1331	eio_req *eio_readdir (const char *path, int pri, eio_cb cb, void *data)
		1332	{
		1333	return eio__1path (EIO_READDIR, path, pri, cb, data);
		1334	}
		1335
		1336	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
		1337	{
		1338	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int3 = (long)dev; SEND;
		1339	}
		1340
		1341	static eio_req *
		1342	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1343	{
		1344	REQ (type); PATH;
		1345
1222	req->flags |= FLAG_PTR2_FREE;	1346	req->flags |= EIO_FLAG_PTR2_FREE;
1223	req->sv1 = newSVsv (fh_or_path);	1347	req->ptr2 = strdup (new_path);
		1348	if (!req->ptr2)
		1349	{
		1350	eio_api_destroy (req);
		1351	return 0;
		1352	}
1224		1353
1225	if (SvPOK (fh_or_path))	1354	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	}	1355	}
1238		1356
1239	void	1357	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	{	1358	{
1243	dREQ;	1359	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	}	1360	}
1262		1361
1263	void	1362	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	{	1363	{
1267	dREQ;	1364	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	}	1365	}
1285		1366
1286	void	1367	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	{	1368	{
1294	dREQ;	1369	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	}	1370	}
1307		1371
1308	void	1372	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	{	1373	{
1312	dREQ;	1374	REQ (EIO_CUSTOM); req->feed = 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	}	1375	}
1331		1376
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	1377	#endif
		1378
		1379	eio_req *eio_grp (eio_cb cb, void *data)
		1380	{
		1381	const int pri = EIO_PRI_MAX;
		1382
		1383	REQ (EIO_GROUP); SEND;
		1384	}
		1385
		1386	#undef REQ
		1387	#undef PATH
		1388	#undef SEND
		1389
		1390	/*****************************************************************************/
		1391	/* grp functions */
1418		1392
1419	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)	1393	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1420	{	1394	{
1421	grp->int2 = limit;	1395	grp->int2 = limit;
1422	grp->feed = feed;	1396	grp->feed = feed;
…		…
1445	grp->grp_first->grp_prev = req;	1419	grp->grp_first->grp_prev = req;
1446		1420
1447	grp->grp_first = req;	1421	grp->grp_first = req;
1448	}	1422	}
1449		1423
		1424	/*****************************************************************************/
		1425	/* misc garbage */
1450		1426
		1427	ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
		1428	{
		1429	etp_worker wrk;
		1430
		1431	wrk.dbuf = 0;
		1432
		1433	eio__sendfile (ofd, ifd, offset, count, &wrk);
		1434
		1435	if (wrk.dbuf)
		1436	free (wrk.dbuf);
		1437	}
		1438

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