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Comparing libeio/eio.c (file contents):
Revision 1.1 by root, Sat May 10 17:16:39 2008 UTC vs.
Revision 1.27 by root, Wed Oct 22 18:15:36 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	{
…		…
239	}	326	}
240		327
241	abort ();	328	abort ();
242	}	329	}
243		330
244	static void grp_feed (eio_req *grp)	331	static void etp_atfork_prepare (void)
245	{	332	{
246	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	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)
247	{	362	{
248	int old_len = grp->size;	363	etp_worker *wrk = wrk_first.next;
249		364
250	EIO_FEED (grp);	365	if (wrk->req)
		366	ETP_DESTROY (wrk->req);
251		367
252	/* stop if no progress has been made */	368	etp_worker_clear (wrk);
253	if (old_len == grp->size)	369	etp_worker_free (wrk);
254	{
255	grp->feed = 0;
256	grp->int2 = 0;
257	}
258	}	370	}
259	}
260		371
261	static int eio_invoke (eio_req *req);	372	started = 0;
		373	idle = 0;
		374	nreqs = 0;
		375	nready = 0;
		376	npending = 0;
262		377
263	static int grp_dec (eio_req *grp)	378	etp_atfork_parent ();
264	{	379	}
265	--grp->size;
266		380
267	/* call feeder, if applicable */	381	static void
268	grp_feed (grp);	382	etp_once_init (void)
		383	{
		384	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
		385	}
269		386
270	/* finish, if done */	387	static int
271	if (!grp->size && grp->int1)	388	etp_init (void (*want_poll)(void), void (*done_poll)(void))
272	return eio_invoke (grp);	389	{
273	else	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
274	return 0;	397	return 0;
275	}	398	}
276		399
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_invoke (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);	400	X_THREAD_PROC (etp_proc);
326		401
327	static void start_thread (void)	402	static void etp_start_thread (void)
328	{	403	{
329	worker *wrk = calloc (1, sizeof (worker));	404	etp_worker *wrk = calloc (1, sizeof (etp_worker));
330		405
331	if (!wrk)	406	/*TODO*/
332	croak ("unable to allocate worker thread data");	407	assert (("unable to allocate worker thread data", wrk));
333		408
334	X_LOCK (wrklock);	409	X_LOCK (wrklock);
335		410
336	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))	411	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
337	{	412	{
338	wrk->prev = &wrk_first;	413	wrk->prev = &wrk_first;
339	wrk->next = wrk_first.next;	414	wrk->next = wrk_first.next;
340	wrk_first.next->prev = wrk;	415	wrk_first.next->prev = wrk;
341	wrk_first.next = wrk;	416	wrk_first.next = wrk;
…		…
345	free (wrk);	420	free (wrk);
346		421
347	X_UNLOCK (wrklock);	422	X_UNLOCK (wrklock);
348	}	423	}
349		424
350	static void maybe_start_thread (void)	425	static void etp_maybe_start_thread (void)
351	{	426	{
352	if (eio_nthreads () >= wanted)	427	if (expect_true (etp_nthreads () >= wanted))
353	return;	428	return;
354		429
355	/* todo: maybe use idle here, but might be less exact */	430	/* todo: maybe use idle here, but might be less exact */
356	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())	431	if (expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
357	return;	432	return;
358		433
359	start_thread ();	434	etp_start_thread ();
360	}	435	}
361		436
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)	437	static void etp_end_thread (void)
376	{	438	{
377	eio_req *req = calloc (1, sizeof (eio_req));	439	eio_req *req = calloc (1, sizeof (eio_req));
378		440
379	req->type = EIO_QUIT;	441	req->type = -1;
380	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	442	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
381		443
382	X_LOCK (reqlock);	444	X_LOCK (reqlock);
383	reqq_push (&req_queue, req);	445	reqq_push (&req_queue, req);
384	X_COND_SIGNAL (reqwait);	446	X_COND_SIGNAL (reqwait);
385	X_UNLOCK (reqlock);	447	X_UNLOCK (reqlock);
…		…
387	X_LOCK (wrklock);	449	X_LOCK (wrklock);
388	--started;	450	--started;
389	X_UNLOCK (wrklock);	451	X_UNLOCK (wrklock);
390	}	452	}
391		453
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)	454	static int etp_poll (void)
429	{	455	{
430	int maxreqs = max_poll_reqs;	456	unsigned int maxreqs;
		457	unsigned int maxtime;
431	struct timeval tv_start, tv_now;	458	struct timeval tv_start, tv_now;
432	eio_req *req;
433		459
		460	X_LOCK (reslock);
		461	maxreqs = max_poll_reqs;
		462	maxtime = max_poll_time;
		463	X_UNLOCK (reslock);
		464
434	if (max_poll_time)	465	if (maxtime)
435	gettimeofday (&tv_start, 0);	466	gettimeofday (&tv_start, 0);
436		467
437	for (;;)	468	for (;;)
438	{	469	{
		470	ETP_REQ *req;
		471
439	maybe_start_thread ();	472	etp_maybe_start_thread ();
440		473
441	X_LOCK (reslock);	474	X_LOCK (reslock);
442	req = reqq_shift (&res_queue);	475	req = reqq_shift (&res_queue);
443		476
444	if (req)	477	if (req)
445	{	478	{
446	--npending;	479	--npending;
447		480
448	if (!res_queue.size)	481	if (!res_queue.size && done_poll_cb)
449	done_poll_cb ();	482	done_poll_cb ();
450	}	483	}
451		484
452	X_UNLOCK (reslock);	485	X_UNLOCK (reslock);
453		486
454	if (!req)	487	if (!req)
455	return 0;	488	return 0;
456		489
		490	X_LOCK (reqlock);
457	--nreqs;	491	--nreqs;
		492	X_UNLOCK (reqlock);
458		493
459	if (req->type == EIO_GROUP && req->size)	494	if (expect_false (req->type == EIO_GROUP && req->size))
460	{	495	{
461	req->int1 = 1; /* mark request as delayed */	496	req->int1 = 1; /* mark request as delayed */
462	continue;	497	continue;
463	}	498	}
464	else	499	else
465	{	500	{
466	int res = eio_invoke (req);	501	int res = ETP_FINISH (req);
467	if (res)	502	if (expect_false (res))
468	return res;	503	return res;
469	}	504	}
470		505
471	if (maxreqs && !--maxreqs)	506	if (expect_false (maxreqs && !--maxreqs))
472	break;	507	break;
473		508
474	if (max_poll_time)	509	if (maxtime)
475	{	510	{
476	gettimeofday (&tv_now, 0);	511	gettimeofday (&tv_now, 0);
477		512
478	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)	513	if (tvdiff (&tv_start, &tv_now) >= maxtime)
479	break;	514	break;
480	}	515	}
481	}	516	}
482		517
483	errno = EAGAIN;	518	errno = EAGAIN;
484	return -1;	519	return -1;
485	}	520	}
486		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	/*****************************************************************************/
		604
		605	static void grp_try_feed (eio_req *grp)
		606	{
		607	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
		608	{
		609	grp->flags &= ~EIO_FLAG_GROUPADD;
		610
		611	EIO_FEED (grp);
		612
		613	/* stop if no progress has been made */
		614	if (!(grp->flags & EIO_FLAG_GROUPADD))
		615	{
		616	grp->feed = 0;
		617	break;
		618	}
		619	}
		620	}
		621
		622	static int grp_dec (eio_req *grp)
		623	{
		624	--grp->size;
		625
		626	/* call feeder, if applicable */
		627	grp_try_feed (grp);
		628
		629	/* finish, if done */
		630	if (!grp->size && grp->int1)
		631	return eio_finish (grp);
		632	else
		633	return 0;
		634	}
		635
		636	void eio_destroy (eio_req *req)
		637	{
		638	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
		639	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
		640
		641	EIO_DESTROY (req);
		642	}
		643
		644	static int eio_finish (eio_req *req)
		645	{
		646	int res = EIO_FINISH (req);
		647
		648	if (req->grp)
		649	{
		650	int res2;
		651	eio_req *grp = req->grp;
		652
		653	/* unlink request */
		654	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		655	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		656
		657	if (grp->grp_first == req)
		658	grp->grp_first = req->grp_next;
		659
		660	res2 = grp_dec (grp);
		661
		662	if (!res && res2)
		663	res = res2;
		664	}
		665
		666	eio_destroy (req);
		667
		668	return res;
		669	}
		670
		671	void eio_grp_cancel (eio_req *grp)
		672	{
		673	for (grp = grp->grp_first; grp; grp = grp->grp_next)
		674	eio_cancel (grp);
		675	}
		676
		677	void eio_cancel (eio_req *req)
		678	{
		679	etp_cancel (req);
		680	}
		681
		682	void eio_submit (eio_req *req)
		683	{
		684	etp_submit (req);
		685	}
		686
		687	unsigned int eio_nreqs (void)
		688	{
		689	return etp_nreqs ();
		690	}
		691
		692	unsigned int eio_nready (void)
		693	{
		694	return etp_nready ();
		695	}
		696
		697	unsigned int eio_npending (void)
		698	{
		699	return etp_npending ();
		700	}
		701
		702	unsigned int eio_nthreads (void)
		703	{
		704	return etp_nthreads ();
		705	}
		706
		707	void eio_set_max_poll_time (double nseconds)
		708	{
		709	etp_set_max_poll_time (nseconds);
		710	}
		711
		712	void eio_set_max_poll_reqs (unsigned int maxreqs)
		713	{
		714	etp_set_max_poll_reqs (maxreqs);
		715	}
		716
		717	void eio_set_max_idle (unsigned int nthreads)
		718	{
		719	etp_set_max_idle (nthreads);
		720	}
		721
		722	void eio_set_min_parallel (unsigned int nthreads)
		723	{
		724	etp_set_min_parallel (nthreads);
		725	}
		726
		727	void eio_set_max_parallel (unsigned int nthreads)
		728	{
		729	etp_set_max_parallel (nthreads);
		730	}
		731
		732	int eio_poll (void)
		733	{
		734	return etp_poll ();
		735	}
		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
		741	# undef pread
		742	# undef pwrite
491	# define pread aio_pread	743	# define pread eio__pread
492	# define pwrite aio_pwrite	744	# define pwrite eio__pwrite
493		745
494	/*	746	static ssize_t
495	* make our pread/pwrite safe against themselves, but not against	747	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	{	748	{
503	ssize_t res;	749	ssize_t res;
504	off_t ooffset;	750	off_t ooffset;
505		751
506	X_LOCK (preadwritelock);	752	X_LOCK (preadwritelock);
…		…
511	X_UNLOCK (preadwritelock);	757	X_UNLOCK (preadwritelock);
512		758
513	return res;	759	return res;
514	}	760	}
515		761
516	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	762	static ssize_t
		763	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
517	{	764	{
518	ssize_t res;	765	ssize_t res;
519	off_t ooffset;	766	off_t ooffset;
520		767
521	X_LOCK (preadwritelock);	768	X_LOCK (preadwritelock);
…		…
529	}	776	}
530	#endif	777	#endif
531		778
532	#ifndef HAVE_FUTIMES	779	#ifndef HAVE_FUTIMES
533		780
		781	# undef utimes
		782	# undef futimes
534	# define utimes(path,times) aio_utimes (path, times)	783	# define utimes(path,times) eio__utimes (path, times)
535	# define futimes(fd,times) aio_futimes (fd, times)	784	# define futimes(fd,times) eio__futimes (fd, times)
536		785
		786	static int
537	static int aio_utimes (const char *filename, const struct timeval times[2])	787	eio__utimes (const char *filename, const struct timeval times[2])
538	{	788	{
539	if (times)	789	if (times)
540	{	790	{
541	struct utimbuf buf;	791	struct utimbuf buf;
542		792
…		…
547	}	797	}
548	else	798	else
549	return utime (filename, 0);	799	return utime (filename, 0);
550	}	800	}
551		801
552	static int aio_futimes (int fd, const struct timeval tv[2])	802	static int eio__futimes (int fd, const struct timeval tv[2])
553	{	803	{
554	errno = ENOSYS;	804	errno = ENOSYS;
555	return -1;	805	return -1;
556	}	806	}
557		807
558	#endif	808	#endif
559		809
560	#if !HAVE_FDATASYNC	810	#if !HAVE_FDATASYNC
		811	# undef fdatasync
561	# define fdatasync fsync	812	# define fdatasync(fd) fsync (fd)
562	#endif	813	#endif
		814
		815	/* sync_file_range always needs emulation */
		816	int
		817	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
		818	{
		819	#if HAVE_SYNC_FILE_RANGE
		820	int res;
		821
		822	if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE
		823	|| EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE
		824	|| EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER)
		825	{
		826	flags = 0
		827	| (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0)
		828	| (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0)
		829	| (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0);
		830	}
		831
		832	res = sync_file_range (fd, offset, nbytes, flags);
		833
		834	if (res != ENOSYS)
		835	return res;
		836	#endif
		837
		838	/* even though we could play tricks with the flags, it's better to always
		839	* call fdatasync, as thta matches the expectation of it's users best */
		840	return fdatasync (fd);
		841	}
563		842
564	#if !HAVE_READAHEAD	843	#if !HAVE_READAHEAD
		844	# undef readahead
565	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	845	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
566		846
		847	static ssize_t
567	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)	848	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
568	{	849	{
569	size_t todo = count;	850	size_t todo = count;
570	dBUF;	851	dBUF;
571		852
572	while (todo > 0)	853	while (todo > 0)
573	{	854	{
574	size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE;	855	size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE;
575		856
576	pread (fd, aio_buf, len, offset);	857	pread (fd, eio_buf, len, offset);
577	offset += len;	858	offset += len;
578	todo -= len;	859	todo -= len;
579	}	860	}
580		861
581	errno = 0;	862	errno = 0;
582	return count;	863	return count;
583	}	864	}
584		865
585	#endif	866	#endif
586		867
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 */	868	/* sendfile always needs emulation */
		869	static ssize_t
618	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)	870	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)
619	{	871	{
620	ssize_t res;	872	ssize_t res;
621		873
622	if (!count)	874	if (!count)
623	return 0;	875	return 0;
…		…
706		958
707	return res;	959	return res;
708	}	960	}
709		961
710	/* read a full directory */	962	/* read a full directory */
		963	static void
711	static void scandir_ (eio_req *req, worker *self)	964	eio__scandir (eio_req *req, etp_worker *self)
712	{	965	{
713	DIR *dirp;	966	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;	967	EIO_STRUCT_DIRENT *entp;
720	char *name, *names;	968	char *name, *names;
721	int memlen = 4096;	969	int memlen = 4096;
722	int memofs = 0;	970	int memofs = 0;
723	int res = 0;	971	int res = 0;
724		972
725	X_LOCK (wrklock);	973	X_LOCK (wrklock);
		974	/* the corresponding closedir is in ETP_WORKER_CLEAR */
726	self->dirp = dirp = opendir (req->ptr1);	975	self->dirp = dirp = opendir (req->ptr1);
727	self->dbuf = u = malloc (sizeof (*u));
728	req->flags |= EIO_FLAG_PTR2_FREE;	976	req->flags |= EIO_FLAG_PTR2_FREE;
729	req->ptr2 = names = malloc (memlen);	977	req->ptr2 = names = malloc (memlen);
730	X_UNLOCK (wrklock);	978	X_UNLOCK (wrklock);
731		979
732	if (dirp && u && names)	980	if (dirp && names)
733	for (;;)	981	for (;;)
734	{	982	{
735	errno = 0;	983	errno = 0;
736	readdir_r (dirp, &u->d, &entp);	984	entp = readdir (dirp);
737		985
738	if (!entp)	986	if (!entp)
739	break;	987	break;
740		988
741	name = entp->d_name;	989	name = entp->d_name;
…		…
766	res = -1;	1014	res = -1;
767		1015
768	req->result = res;	1016	req->result = res;
769	}	1017	}
770		1018
		1019	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
		1020	# undef msync
		1021	# define msync(a,b,c) ENOSYS
		1022	#endif
		1023
		1024	int
		1025	eio__mtouch (void *mem, size_t len, int flags)
		1026	{
		1027	intptr_t addr = (intptr_t)mem;
		1028	intptr_t end = addr + len;
		1029	#ifdef PAGESIZE
		1030	const intptr_t page = PAGESIZE;
		1031	#else
		1032	static intptr_t page;
		1033
		1034	if (!page)
		1035	page = sysconf (_SC_PAGESIZE);
		1036	#endif
		1037
		1038	addr &= ~(page - 1); /* assume page size is always a power of two */
		1039
		1040	if (addr < end)
		1041	if (flags) /* modify */
		1042	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len);
		1043	else
		1044	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len);
		1045
		1046	return 0;
		1047	}
		1048
771	/*****************************************************************************/	1049	/*****************************************************************************/
772		1050
		1051	#define ALLOC(len) \
		1052	if (!req->ptr2) \
		1053	{ \
		1054	X_LOCK (wrklock); \
		1055	req->flags |= EIO_FLAG_PTR2_FREE; \
		1056	X_UNLOCK (wrklock); \
		1057	req->ptr2 = malloc (len); \
		1058	if (!req->ptr2) \
		1059	{ \
		1060	errno = ENOMEM; \
		1061	req->result = -1; \
		1062	break; \
		1063	} \
		1064	}
		1065
773	X_THREAD_PROC (eio_proc)	1066	X_THREAD_PROC (etp_proc)
774	{	1067	{
775	eio_req *req;	1068	ETP_REQ *req;
776	struct timespec ts;	1069	struct timespec ts;
777	worker *self = (worker *)thr_arg;	1070	etp_worker *self = (etp_worker *)thr_arg;
778		1071
779	/* try to distribute timeouts somewhat randomly */	1072	/* try to distribute timeouts somewhat randomly */
780	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1073	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
781		1074
782	for (;;)	1075	for (;;)
783	{	1076	{
784	ts.tv_sec = time (0) + IDLE_TIMEOUT;
785
786	X_LOCK (reqlock);	1077	X_LOCK (reqlock);
787		1078
788	for (;;)	1079	for (;;)
789	{	1080	{
790	self->req = req = reqq_shift (&req_queue);	1081	self->req = req = reqq_shift (&req_queue);
…		…
792	if (req)	1083	if (req)
793	break;	1084	break;
794		1085
795	++idle;	1086	++idle;
796		1087
		1088	ts.tv_sec = time (0) + IDLE_TIMEOUT;
797	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1089	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
798	{	1090	{
799	if (idle > max_idle)	1091	if (idle > max_idle)
800	{	1092	{
801	--idle;	1093	--idle;
…		…
806	goto quit;	1098	goto quit;
807	}	1099	}
808		1100
809	/* we are allowed to idle, so do so without any timeout */	1101	/* we are allowed to idle, so do so without any timeout */
810	X_COND_WAIT (reqwait, reqlock);	1102	X_COND_WAIT (reqwait, reqlock);
811	ts.tv_sec = time (0) + IDLE_TIMEOUT;
812	}	1103	}
813		1104
814	--idle;	1105	--idle;
815	}	1106	}
816		1107
817	--nready;	1108	--nready;
818		1109
819	X_UNLOCK (reqlock);	1110	X_UNLOCK (reqlock);
820		1111
821	errno = 0; /* strictly unnecessary */	1112	if (req->type < 0)
		1113	goto quit;
822		1114
823	if (!EIO_CANCELLED (req))	1115	if (!EIO_CANCELLED (req))
824	switch (req->type)	1116	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		1117
918	X_LOCK (reslock);	1118	X_LOCK (reslock);
919		1119
920	++npending;	1120	++npending;
921		1121
922	if (!reqq_push (&res_queue, req))	1122	if (!reqq_push (&res_queue, req) && want_poll_cb)
923	want_poll_cb ();	1123	want_poll_cb ();
924		1124
925	self->req = 0;	1125	self->req = 0;
926	worker_clear (self);	1126	etp_worker_clear (self);
927		1127
928	X_UNLOCK (reslock);	1128	X_UNLOCK (reslock);
929	}	1129	}
930		1130
931	quit:	1131	quit:
932	X_LOCK (wrklock);	1132	X_LOCK (wrklock);
933	worker_free (self);	1133	etp_worker_free (self);
934	X_UNLOCK (wrklock);	1134	X_UNLOCK (wrklock);
935		1135
936	return 0;	1136	return 0;
937	}	1137	}
938		1138
939	/*****************************************************************************/	1139	/*****************************************************************************/
940		1140
941	static void atfork_prepare (void)	1141	int eio_init (void (*want_poll)(void), void (*done_poll)(void))
942	{	1142	{
943	X_LOCK (wrklock);	1143	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	}	1144	}
953		1145
954	static void atfork_parent (void)	1146	static void eio_api_destroy (eio_req *req)
955	{	1147	{
956	#if !HAVE_READDIR_R	1148	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	}	1149	}
966		1150
967	static void atfork_child (void)	1151	#define REQ(rtype) \
968	{	1152	eio_req *req; \
969	eio_req *prv;	1153	\
		1154	req = (eio_req *)calloc (1, sizeof *req); \
		1155	if (!req) \
		1156	return 0; \
		1157	\
		1158	req->type = rtype; \
		1159	req->pri = pri; \
		1160	req->finish = cb; \
		1161	req->data = data; \
		1162	req->destroy = eio_api_destroy;
970		1163
971	while (prv = reqq_shift (&req_queue))	1164	#define SEND eio_submit (req); return req
972	eio_destroy (prv);
973		1165
974	while (prv = reqq_shift (&res_queue))	1166	#define PATH \
975	eio_destroy (prv);	1167	req->flags |= EIO_FLAG_PTR1_FREE; \
		1168	req->ptr1 = strdup (path); \
		1169	if (!req->ptr1) \
		1170	{ \
		1171	eio_api_destroy (req); \
		1172	return 0; \
		1173	}
976		1174
977	while (wrk_first.next != &wrk_first)	1175	static void eio_execute (etp_worker *self, eio_req *req)
		1176	{
		1177	errno = 0;
		1178
		1179	switch (req->type)
978	{	1180	{
979	worker *wrk = wrk_first.next;	1181	case EIO_READ: ALLOC (req->size);
		1182	req->result = req->offs >= 0
		1183	? pread (req->int1, req->ptr2, req->size, req->offs)
		1184	: read (req->int1, req->ptr2, req->size); break;
		1185	case EIO_WRITE: req->result = req->offs >= 0
		1186	? pwrite (req->int1, req->ptr2, req->size, req->offs)
		1187	: write (req->int1, req->ptr2, req->size); break;
980		1188
981	if (wrk->req)	1189	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
982	eio_destroy (wrk->req);	1190	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break;
983		1191
984	worker_clear (wrk);	1192	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
985	worker_free (wrk);	1193	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
986	}	1194	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1195	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1196	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1197	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
987		1198
988	started = 0;	1199	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
989	idle = 0;	1200	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
990	nreqs = 0;	1201	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
991	nready = 0;	1202	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
992	npending = 0;	1203	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		1204	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
993		1205
994	atfork_parent ();	1206	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
995	}	1207	case EIO_CLOSE: req->result = close (req->int1); break;
		1208	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
		1209	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
		1210	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
		1211	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
		1212	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
		1213	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
		1214	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
		1215	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->int3); break;
996		1216
997	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	1217	case EIO_READLINK: ALLOC (NAME_MAX);
998	{	1218	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
999	want_poll_cb = want_poll;
1000	done_poll_cb = done_poll;
1001		1219
		1220	case EIO_SYNC: req->result = 0; sync (); break;
		1221	case EIO_FSYNC: req->result = fsync (req->int1); break;
		1222	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		1223	case EIO_MSYNC: req->result = msync (req->ptr2, req->size, req->int1); break;
		1224	case EIO_MTOUCH: req->result = eio__mtouch (req->ptr2, req->size, req->int1); break;
		1225	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
		1226
		1227	case EIO_READDIR: eio__scandir (req, self); break;
		1228
		1229	case EIO_BUSY:
1002	#ifdef _WIN32	1230	#ifdef _WIN32
1003	X_MUTEX_CHECK (wrklock);	1231	Sleep (req->nv1 * 1000.);
1004	X_MUTEX_CHECK (reslock);	1232	#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 (atfork_prepare, atfork_parent, 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	{	1233	{
1130	dREQ;	1234	struct timeval tv;
1131		1235
1132	req->type = ix;	1236	tv.tv_sec = req->nv1;
1133	req->sv1 = newSVsv (fh);	1237	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		1238
1142	if (!SvREADONLY (data))	1239	req->result = select (0, 0, 0, 0, &tv);
		1240	}
		1241	#endif
		1242	break;
		1243
		1244	case EIO_UTIME:
		1245	case EIO_FUTIME:
		1246	{
		1247	struct timeval tv[2];
		1248	struct timeval *times;
		1249
		1250	if (req->nv1 != -1. || req->nv2 != -1.)
1143	{	1251	{
1144	SvREADONLY_on (data);	1252	tv[0].tv_sec = req->nv1;
1145	req->flags |= FLAG_SV2_RO_OFF;	1253	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1254	tv[1].tv_sec = req->nv2;
		1255	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1256
		1257	times = tv;
1146	}	1258	}
		1259	else
		1260	times = 0;
1147		1261
1148	EIO_SEND;	1262
		1263	req->result = req->type == EIO_FUTIME
		1264	? futimes (req->int1, times)
		1265	: utimes (req->ptr1, times);
1149	}	1266	}
1150	}	1267	break;
1151		1268
1152	void	1269	case EIO_GROUP:
1153	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)	1270	abort (); /* handled in eio_request */
1154	PROTOTYPE: $$;$
1155	PPCODE:
1156	{
1157	SV *data;
1158	dREQ;
1159		1271
1160	data = newSV (NAME_MAX);	1272	case EIO_NOP:
1161	SvPOK_on (data);	1273	req->result = 0;
		1274	break;
1162		1275
1163	req->type = EIO_READLINK;	1276	case EIO_CUSTOM:
1164	req->sv1 = newSVsv (path);	1277	((void (*)(eio_req *))req->feed) (req);
1165	req->ptr1 = SvPVbyte_nolen (req->sv1);	1278	break;
1166	req->sv2 = data;
1167	req->ptr2 = SvPVbyte_nolen (data);
1168		1279
1169	EIO_SEND;	1280	default:
1170	}	1281	req->result = -1;
		1282	break;
		1283	}
1171		1284
1172	void	1285	req->errorno = errno;
1173	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1174	PROTOTYPE: $$$$;$
1175	PPCODE:
1176	{
1177	dREQ;
1178
1179	req->type = EIO_SENDFILE;
1180	req->sv1 = newSVsv (out_fh);
1181	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1182	req->sv2 = newSVsv (in_fh);
1183	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1184	req->offs = SvVAL64 (in_offset);
1185	req->size = length;
1186
1187	EIO_SEND;
1188	}	1286	}
1189		1287
1190	void	1288	#ifndef EIO_NO_WRAPPERS
1191	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1192	PROTOTYPE: $$$;$
1193	PPCODE:
1194	{
1195	dREQ;
1196		1289
1197	req->type = EIO_READAHEAD;	1290	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	{	1291	{
1213	dREQ;	1292	REQ (EIO_NOP); SEND;
		1293	}
1214		1294
1215	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));	1295	eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
1216	if (!req->ptr2)	1296	{
1217	{	1297	REQ (EIO_BUSY); req->nv1 = delay; SEND;
1218	req_destroy (req);	1298	}
1219	croak ("out of memory during aio_stat statdata allocation");
1220	}
1221		1299
		1300	eio_req *eio_sync (int pri, eio_cb cb, void *data)
		1301	{
		1302	REQ (EIO_SYNC); SEND;
		1303	}
		1304
		1305	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
		1306	{
		1307	REQ (EIO_FSYNC); req->int1 = fd; SEND;
		1308	}
		1309
		1310	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		1311	{
		1312	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		1313	}
		1314
		1315	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		1316	{
		1317	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		1318	}
		1319
		1320	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
		1321	{
		1322	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
		1323	}
		1324
		1325	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
		1326	{
		1327	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
		1328	}
		1329
		1330	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
		1331	{
		1332	REQ (EIO_CLOSE); req->int1 = fd; SEND;
		1333	}
		1334
		1335	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
		1336	{
		1337	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
		1338	}
		1339
		1340	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		1341	{
		1342	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		1343	}
		1344
		1345	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		1346	{
		1347	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		1348	}
		1349
		1350	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
		1351	{
		1352	REQ (EIO_FSTAT); req->int1 = fd; SEND;
		1353	}
		1354
		1355	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
		1356	{
		1357	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
		1358	}
		1359
		1360	eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
		1361	{
		1362	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
		1363	}
		1364
		1365	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
		1366	{
		1367	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
		1368	}
		1369
		1370	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
		1371	{
		1372	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
		1373	}
		1374
		1375	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
		1376	{
		1377	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
		1378	}
		1379
		1380	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data)
		1381	{
		1382	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
		1383	}
		1384
		1385	eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
		1386	{
		1387	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
		1388	}
		1389
		1390	eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
		1391	{
		1392	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
		1393	}
		1394
		1395	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
		1396	{
		1397	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
		1398	}
		1399
		1400	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
		1401	{
		1402	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
		1403	}
		1404
		1405	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
		1406	{
		1407	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
		1408	}
		1409
		1410	eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
		1411	{
		1412	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
		1413	}
		1414
		1415	static eio_req *
		1416	eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
		1417	{
		1418	REQ (type); PATH; SEND;
		1419	}
		1420
		1421	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
		1422	{
		1423	return eio__1path (EIO_READLINK, path, pri, cb, data);
		1424	}
		1425
		1426	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
		1427	{
		1428	return eio__1path (EIO_STAT, path, pri, cb, data);
		1429	}
		1430
		1431	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
		1432	{
		1433	return eio__1path (EIO_LSTAT, path, pri, cb, data);
		1434	}
		1435
		1436	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
		1437	{
		1438	return eio__1path (EIO_UNLINK, path, pri, cb, data);
		1439	}
		1440
		1441	eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
		1442	{
		1443	return eio__1path (EIO_RMDIR, path, pri, cb, data);
		1444	}
		1445
		1446	eio_req *eio_readdir (const char *path, int pri, eio_cb cb, void *data)
		1447	{
		1448	return eio__1path (EIO_READDIR, path, pri, cb, data);
		1449	}
		1450
		1451	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
		1452	{
		1453	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int3 = (long)dev; SEND;
		1454	}
		1455
		1456	static eio_req *
		1457	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1458	{
		1459	REQ (type); PATH;
		1460
1222	req->flags |= FLAG_PTR2_FREE;	1461	req->flags |= EIO_FLAG_PTR2_FREE;
1223	req->sv1 = newSVsv (fh_or_path);	1462	req->ptr2 = strdup (new_path);
		1463	if (!req->ptr2)
		1464	{
		1465	eio_api_destroy (req);
		1466	return 0;
		1467	}
1224		1468
1225	if (SvPOK (fh_or_path))	1469	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	}	1470	}
1238		1471
1239	void	1472	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	{	1473	{
1243	dREQ;	1474	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	}	1475	}
1262		1476
1263	void	1477	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	{	1478	{
1267	dREQ;	1479	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	}	1480	}
1285		1481
1286	void	1482	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	{	1483	{
1294	dREQ;	1484	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	}	1485	}
1307		1486
1308	void	1487	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	{	1488	{
1312	dREQ;	1489	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	}	1490	}
1331		1491
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	1492	#endif
1418		1493
		1494	eio_req *eio_grp (eio_cb cb, void *data)
		1495	{
		1496	const int pri = EIO_PRI_MAX;
		1497
		1498	REQ (EIO_GROUP); SEND;
		1499	}
		1500
		1501	#undef REQ
		1502	#undef PATH
		1503	#undef SEND
		1504
		1505	/*****************************************************************************/
		1506	/* grp functions */
		1507
1419	void eio_grp_feed (eio_req *grp, int limit, void (*feed)(eio_req *req))	1508	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1420	{	1509	{
1421	grp->int2 = limit;	1510	grp->int2 = limit;
1422	grp->feed = feed;	1511	grp->feed = feed;
		1512
		1513	grp_try_feed (grp);
		1514	}
		1515
		1516	void eio_grp_limit (eio_req *grp, int limit)
		1517	{
		1518	grp->int2 = limit;
		1519
		1520	grp_try_feed (grp);
1423	}	1521	}
1424		1522
1425	void eio_grp_add (eio_req *grp, eio_req *req)	1523	void eio_grp_add (eio_req *grp, eio_req *req)
1426	{	1524	{
1427	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	1525	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
		1526
		1527	grp->flags |= EIO_FLAG_GROUPADD;
1428		1528
1429	++grp->size;	1529	++grp->size;
1430	req->grp = grp;	1530	req->grp = grp;
1431		1531
1432	req->grp_prev = 0;	1532	req->grp_prev = 0;
…		…
1436	grp->grp_first->grp_prev = req;	1536	grp->grp_first->grp_prev = req;
1437		1537
1438	grp->grp_first = req;	1538	grp->grp_first = req;
1439	}	1539	}
1440		1540
		1541	/*****************************************************************************/
		1542	/* misc garbage */
1441		1543
		1544	ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
		1545	{
		1546	etp_worker wrk;
		1547
		1548	wrk.dbuf = 0;
		1549
		1550	eio__sendfile (ofd, ifd, offset, count, &wrk);
		1551
		1552	if (wrk.dbuf)
		1553	free (wrk.dbuf);
		1554	}
		1555

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