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Comparing libeio/eio.c (file contents):
Revision 1.4 by root, Sun May 11 00:10:15 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	#include <stddef.h>	44	#include <stddef.h>
…		…
8	#include <errno.h>	47	#include <errno.h>
9	#include <sys/types.h>	48	#include <sys/types.h>
10	#include <sys/stat.h>	49	#include <sys/stat.h>
11	#include <limits.h>	50	#include <limits.h>
12	#include <fcntl.h>	51	#include <fcntl.h>
13	#include <sched.h>	52	#include <assert.h>
14		53
15	#ifndef EIO_FINISH	54	#ifndef EIO_FINISH
16	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0	55	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
17	#endif	56	#endif
18		57
…		…
41	# ifndef EIO_STRUCT_DIRENT	80	# ifndef EIO_STRUCT_DIRENT
42	# define EIO_STRUCT_DIRENT struct dirent	81	# define EIO_STRUCT_DIRENT struct dirent
43	# endif	82	# endif
44		83
45	#endif	84	#endif
46
47	# ifndef EIO_STRUCT_STAT
48	# define EIO_STRUCT_STAT struct stat
49	# endif
50		85
51	#if HAVE_SENDFILE	86	#if HAVE_SENDFILE
52	# if __linux	87	# if __linux
53	# include <sys/sendfile.h>	88	# include <sys/sendfile.h>
54	# elif __freebsd	89	# elif __freebsd
…		…
74	/* buffer size for various temporary buffers */	109	/* buffer size for various temporary buffers */
75	#define EIO_BUFSIZE 65536	110	#define EIO_BUFSIZE 65536
76		111
77	#define dBUF \	112	#define dBUF \
78	char *eio_buf; \	113	char *eio_buf; \
79	X_LOCK (wrklock); \	114	ETP_WORKER_LOCK (self); \
80	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	115	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \
81	X_UNLOCK (wrklock); \	116	ETP_WORKER_UNLOCK (self); \
		117	errno = ENOMEM; \
82	if (!eio_buf) \	118	if (!eio_buf) \
83	return -1;	119	return -1;
84		120
85	#define EIO_TICKS ((1000000 + 1023) >> 10)	121	#define EIO_TICKS ((1000000 + 1023) >> 10)
86		122
		123	/*****************************************************************************/
		124
		125	#if __GNUC__ >= 3
		126	# define expect(expr,value) __builtin_expect ((expr),(value))
		127	#else
		128	# define expect(expr,value) (expr)
		129	#endif
		130
		131	#define expect_false(expr) expect ((expr) != 0, 0)
		132	#define expect_true(expr) expect ((expr) != 0, 1)
		133
		134	/*****************************************************************************/
		135
		136	#define ETP_PRI_MIN EIO_PRI_MIN
		137	#define ETP_PRI_MAX EIO_PRI_MAX
		138
		139	struct etp_worker;
		140
		141	#define ETP_REQ eio_req
		142	#define ETP_DESTROY(req) eio_destroy (req)
		143	static int eio_finish (eio_req *req);
		144	#define ETP_FINISH(req) eio_finish (req)
		145	static void eio_execute (struct etp_worker *self, eio_req *req);
		146	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)
		147
		148	#define ETP_WORKER_CLEAR(req) \
		149	if (wrk->dbuf) \
		150	{ \
		151	free (wrk->dbuf); \
		152	wrk->dbuf = 0; \
		153	} \
		154	\
		155	if (wrk->dirp) \
		156	{ \
		157	closedir (wrk->dirp); \
		158	wrk->dirp = 0; \
		159	}
		160	#define ETP_WORKER_COMMON \
		161	void *dbuf; \
		162	DIR *dirp;
		163
		164	/*****************************************************************************/
		165
		166	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
		167
		168	/* calculcate time difference in ~1/EIO_TICKS of a second */
		169	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		170	{
		171	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
		172	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		173	}
		174
		175	static unsigned int started, idle, wanted = 4;
		176
87	static void (*want_poll_cb) (void);	177	static void (*want_poll_cb) (void);
88	static void (*done_poll_cb) (void);	178	static void (*done_poll_cb) (void);
89		179
90	static unsigned int max_poll_time = 0;	180	static unsigned int max_poll_time; /* reslock */
91	static unsigned int max_poll_reqs = 0;	181	static unsigned int max_poll_reqs; /* reslock */
92		182
93	/* calculcate time difference in ~1/EIO_TICKS of a second */	183	static volatile unsigned int nreqs; /* reqlock */
94	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	184	static volatile unsigned int nready; /* reqlock */
95	{	185	static volatile unsigned int npending; /* reqlock */
96	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	186	static volatile unsigned int max_idle = 4;
97	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
98	}
99		187
100	static unsigned int started, idle, wanted;
101
102	/* worker threads management */
103	static mutex_t wrklock = X_MUTEX_INIT;	188	static mutex_t wrklock = X_MUTEX_INIT;
104
105	typedef struct worker {
106	/* locked by wrklock */
107	struct worker *prev, *next;
108
109	thread_t tid;
110
111	/* locked by reslock, reqlock or wrklock */
112	eio_req *req; /* currently processed request */
113	void *dbuf;
114	DIR *dirp;
115	} worker;
116
117	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
118
119	static void worker_clear (worker *wrk)
120	{
121	if (wrk->dirp)
122	{
123	closedir (wrk->dirp);
124	wrk->dirp = 0;
125	}
126
127	if (wrk->dbuf)
128	{
129	free (wrk->dbuf);
130	wrk->dbuf = 0;
131	}
132	}
133
134	static void worker_free (worker *wrk)
135	{
136	wrk->next->prev = wrk->prev;
137	wrk->prev->next = wrk->next;
138
139	free (wrk);
140	}
141
142	static volatile unsigned int nreqs, nready, npending;
143	static volatile unsigned int max_idle = 4;
144
145	static mutex_t reslock = X_MUTEX_INIT;	189	static mutex_t reslock = X_MUTEX_INIT;
146	static mutex_t reqlock = X_MUTEX_INIT;	190	static mutex_t reqlock = X_MUTEX_INIT;
147	static cond_t reqwait = X_COND_INIT;	191	static cond_t reqwait = X_COND_INIT;
148		192
		193	#if !HAVE_PREADWRITE
		194	/*
		195	* make our pread/pwrite emulation safe against themselves, but not against
		196	* normal read/write by using a mutex. slows down execution a lot,
		197	* but that's your problem, not mine.
		198	*/
		199	static mutex_t preadwritelock = X_MUTEX_INIT;
		200	#endif
		201
		202	typedef struct etp_worker
		203	{
		204	/* locked by wrklock */
		205	struct etp_worker *prev, *next;
		206
		207	thread_t tid;
		208
		209	/* locked by reslock, reqlock or wrklock */
		210	ETP_REQ *req; /* currently processed request */
		211
		212	ETP_WORKER_COMMON
		213	} etp_worker;
		214
		215	static etp_worker wrk_first = { &wrk_first, &wrk_first, 0 }; /* NOT etp */
		216
		217	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
		218	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
		219
		220	/* worker threads management */
		221
		222	static void etp_worker_clear (etp_worker *wrk)
		223	{
		224	ETP_WORKER_CLEAR (wrk);
		225	}
		226
		227	static void etp_worker_free (etp_worker *wrk)
		228	{
		229	wrk->next->prev = wrk->prev;
		230	wrk->prev->next = wrk->next;
		231
		232	free (wrk);
		233	}
		234
149	unsigned int eio_nreqs (void)	235	static unsigned int etp_nreqs (void)
150	{	236	{
		237	int retval;
		238	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		239	retval = nreqs;
		240	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
151	return nreqs;	241	return retval;
152	}	242	}
153		243
154	unsigned int eio_nready (void)	244	static unsigned int etp_nready (void)
155	{	245	{
156	unsigned int retval;	246	unsigned int retval;
157		247
158	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	248	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
159	retval = nready;	249	retval = nready;
160	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	250	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
161		251
162	return retval;	252	return retval;
163	}	253	}
164		254
165	unsigned int eio_npending (void)	255	static unsigned int etp_npending (void)
166	{	256	{
167	unsigned int retval;	257	unsigned int retval;
168		258
169	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	259	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
170	retval = npending;	260	retval = npending;
171	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	261	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
172		262
173	return retval;	263	return retval;
174	}	264	}
175		265
176	unsigned int eio_nthreads (void)	266	static unsigned int etp_nthreads (void)
177	{	267	{
178	unsigned int retval;	268	unsigned int retval;
179		269
180	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	270	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
181	retval = started;	271	retval = started;
…		…
188	* a somewhat faster data structure might be nice, but	278	* a somewhat faster data structure might be nice, but
189	* with 8 priorities this actually needs <20 insns	279	* with 8 priorities this actually needs <20 insns
190	* per shift, the most expensive operation.	280	* per shift, the most expensive operation.
191	*/	281	*/
192	typedef struct {	282	typedef struct {
193	eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */	283	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
194	int size;	284	int size;
195	} reqq;	285	} etp_reqq;
196		286
197	static reqq req_queue;	287	static etp_reqq req_queue;
198	static reqq res_queue;	288	static etp_reqq res_queue;
199		289
200	static int reqq_push (reqq *q, eio_req *req)	290	static int reqq_push (etp_reqq *q, ETP_REQ *req)
201	{	291	{
202	int pri = req->pri;	292	int pri = req->pri;
203	req->next = 0;	293	req->next = 0;
204		294
205	if (q->qe[pri])	295	if (q->qe[pri])
…		…
211	q->qe[pri] = q->qs[pri] = req;	301	q->qe[pri] = q->qs[pri] = req;
212		302
213	return q->size++;	303	return q->size++;
214	}	304	}
215		305
216	static eio_req *reqq_shift (reqq *q)	306	static ETP_REQ *reqq_shift (etp_reqq *q)
217	{	307	{
218	int pri;	308	int pri;
219		309
220	if (!q->size)	310	if (!q->size)
221	return 0;	311	return 0;
222		312
223	--q->size;	313	--q->size;
224		314
225	for (pri = EIO_NUM_PRI; pri--; )	315	for (pri = ETP_NUM_PRI; pri--; )
226	{	316	{
227	eio_req *req = q->qs[pri];	317	eio_req *req = q->qs[pri];
228		318
229	if (req)	319	if (req)
230	{	320	{
…		…
236	}	326	}
237		327
238	abort ();	328	abort ();
239	}	329	}
240		330
241	static void grp_try_feed (eio_req *grp)	331	static void etp_atfork_prepare (void)
242	{	332	{
243	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)
244	{	362	{
245	int old_len = grp->size;	363	etp_worker *wrk = wrk_first.next;
246		364
247	EIO_FEED (grp);	365	if (wrk->req)
		366	ETP_DESTROY (wrk->req);
248		367
249	/* stop if no progress has been made */	368	etp_worker_clear (wrk);
250	if (old_len == grp->size)	369	etp_worker_free (wrk);
251	{
252	grp->feed = 0;
253	break;
254	}
255	}	370	}
256	}
257		371
258	static int eio_finish (eio_req *req);	372	started = 0;
		373	idle = 0;
		374	nreqs = 0;
		375	nready = 0;
		376	npending = 0;
259		377
260	static int grp_dec (eio_req *grp)	378	etp_atfork_parent ();
261	{	379	}
262	--grp->size;
263		380
264	/* call feeder, if applicable */	381	static void
265	grp_try_feed (grp);	382	etp_once_init (void)
		383	{
		384	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
		385	}
266		386
267	/* finish, if done */	387	static int
268	if (!grp->size && grp->int1)	388	etp_init (void (*want_poll)(void), void (*done_poll)(void))
269	return eio_finish (grp);	389	{
270	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
271	return 0;	397	return 0;
272	}	398	}
273		399
274	void eio_destroy (eio_req *req)
275	{
276	if ((req)->flags & EIO_FLAG_PTR2_FREE)
277	free (req->ptr2);
278
279	EIO_DESTROY (req);
280	}
281
282	static int eio_finish (eio_req *req)
283	{
284	int res = EIO_FINISH (req);
285
286	if (req->grp)
287	{
288	int res2;
289	eio_req *grp = req->grp;
290
291	/* unlink request */
292	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
293	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
294
295	if (grp->grp_first == req)
296	grp->grp_first = req->grp_next;
297
298	res2 = grp_dec (grp);
299
300	if (!res && res2)
301	res = res2;
302	}
303
304	eio_destroy (req);
305
306	return res;
307	}
308
309	void eio_grp_cancel (eio_req *grp)
310	{
311	for (grp = grp->grp_first; grp; grp = grp->grp_next)
312	eio_cancel (grp);
313	}
314
315	void eio_cancel (eio_req *req)
316	{
317	req->flags |= EIO_FLAG_CANCELLED;
318
319	eio_grp_cancel (req);
320	}
321
322	X_THREAD_PROC (eio_proc);	400	X_THREAD_PROC (etp_proc);
323		401
324	static void start_thread (void)	402	static void etp_start_thread (void)
325	{	403	{
326	worker *wrk = calloc (1, sizeof (worker));	404	etp_worker *wrk = calloc (1, sizeof (etp_worker));
327		405
328	if (!wrk)	406	/*TODO*/
329	croak ("unable to allocate worker thread data");	407	assert (("unable to allocate worker thread data", wrk));
330		408
331	X_LOCK (wrklock);	409	X_LOCK (wrklock);
332		410
333	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))	411	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
334	{	412	{
335	wrk->prev = &wrk_first;	413	wrk->prev = &wrk_first;
336	wrk->next = wrk_first.next;	414	wrk->next = wrk_first.next;
337	wrk_first.next->prev = wrk;	415	wrk_first.next->prev = wrk;
338	wrk_first.next = wrk;	416	wrk_first.next = wrk;
…		…
342	free (wrk);	420	free (wrk);
343		421
344	X_UNLOCK (wrklock);	422	X_UNLOCK (wrklock);
345	}	423	}
346		424
347	static void maybe_start_thread (void)	425	static void etp_maybe_start_thread (void)
348	{	426	{
349	if (eio_nthreads () >= wanted)	427	if (expect_true (etp_nthreads () >= wanted))
350	return;	428	return;
351		429
352	/* todo: maybe use idle here, but might be less exact */	430	/* todo: maybe use idle here, but might be less exact */
353	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 ()))
354	return;	432	return;
355		433
356	start_thread ();	434	etp_start_thread ();
357	}	435	}
358		436
359	void eio_submit (eio_req *req)
360	{
361	++nreqs;
362
363	X_LOCK (reqlock);
364	++nready;
365	reqq_push (&req_queue, req);
366	X_COND_SIGNAL (reqwait);
367	X_UNLOCK (reqlock);
368
369	maybe_start_thread ();
370	}
371
372	static void end_thread (void)	437	static void etp_end_thread (void)
373	{	438	{
374	eio_req *req = calloc (1, sizeof (eio_req));	439	eio_req *req = calloc (1, sizeof (eio_req));
375		440
376	req->type = EIO_QUIT;	441	req->type = -1;
377	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	442	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
378		443
379	X_LOCK (reqlock);	444	X_LOCK (reqlock);
380	reqq_push (&req_queue, req);	445	reqq_push (&req_queue, req);
381	X_COND_SIGNAL (reqwait);	446	X_COND_SIGNAL (reqwait);
382	X_UNLOCK (reqlock);	447	X_UNLOCK (reqlock);
…		…
384	X_LOCK (wrklock);	449	X_LOCK (wrklock);
385	--started;	450	--started;
386	X_UNLOCK (wrklock);	451	X_UNLOCK (wrklock);
387	}	452	}
388		453
389	void eio_set_max_poll_time (double nseconds)
390	{
391	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
392	max_poll_time = nseconds;
393	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
394	}
395
396	void eio_set_max_poll_reqs (unsigned int maxreqs)
397	{
398	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
399	max_poll_reqs = maxreqs;
400	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
401	}
402
403	void eio_set_max_idle (unsigned int nthreads)
404	{
405	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
406	max_idle = nthreads <= 0 ? 1 : nthreads;
407	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
408	}
409
410	void eio_set_min_parallel (unsigned int nthreads)
411	{
412	if (wanted < nthreads)
413	wanted = nthreads;
414	}
415
416	void eio_set_max_parallel (unsigned int nthreads)
417	{
418	if (wanted > nthreads)
419	wanted = nthreads;
420
421	while (started > wanted)
422	end_thread ();
423	}
424
425	int eio_poll (void)	454	static int etp_poll (void)
426	{	455	{
427	int maxreqs = max_poll_reqs;	456	unsigned int maxreqs;
		457	unsigned int maxtime;
428	struct timeval tv_start, tv_now;	458	struct timeval tv_start, tv_now;
429	eio_req *req;
430		459
		460	X_LOCK (reslock);
		461	maxreqs = max_poll_reqs;
		462	maxtime = max_poll_time;
		463	X_UNLOCK (reslock);
		464
431	if (max_poll_time)	465	if (maxtime)
432	gettimeofday (&tv_start, 0);	466	gettimeofday (&tv_start, 0);
433		467
434	for (;;)	468	for (;;)
435	{	469	{
		470	ETP_REQ *req;
		471
436	maybe_start_thread ();	472	etp_maybe_start_thread ();
437		473
438	X_LOCK (reslock);	474	X_LOCK (reslock);
439	req = reqq_shift (&res_queue);	475	req = reqq_shift (&res_queue);
440		476
441	if (req)	477	if (req)
…		…
449	X_UNLOCK (reslock);	485	X_UNLOCK (reslock);
450		486
451	if (!req)	487	if (!req)
452	return 0;	488	return 0;
453		489
		490	X_LOCK (reqlock);
454	--nreqs;	491	--nreqs;
		492	X_UNLOCK (reqlock);
455		493
456	if (req->type == EIO_GROUP && req->size)	494	if (expect_false (req->type == EIO_GROUP && req->size))
457	{	495	{
458	req->int1 = 1; /* mark request as delayed */	496	req->int1 = 1; /* mark request as delayed */
459	continue;	497	continue;
460	}	498	}
461	else	499	else
462	{	500	{
463	int res = eio_finish (req);	501	int res = ETP_FINISH (req);
464	if (res)	502	if (expect_false (res))
465	return res;	503	return res;
466	}	504	}
467		505
468	if (maxreqs && !--maxreqs)	506	if (expect_false (maxreqs && !--maxreqs))
469	break;	507	break;
470		508
471	if (max_poll_time)	509	if (maxtime)
472	{	510	{
473	gettimeofday (&tv_now, 0);	511	gettimeofday (&tv_now, 0);
474		512
475	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)	513	if (tvdiff (&tv_start, &tv_now) >= maxtime)
476	break;	514	break;
477	}	515	}
478	}	516	}
479		517
480	errno = EAGAIN;	518	errno = EAGAIN;
481	return -1;	519	return -1;
482	}	520	}
483		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
484	/*****************************************************************************/	737	/*****************************************************************************/
485	/* work around various missing functions */	738	/* work around various missing functions */
486		739
487	#if !HAVE_PREADWRITE	740	#if !HAVE_PREADWRITE
		741	# undef pread
		742	# undef pwrite
488	# define pread aio_pread	743	# define pread eio__pread
489	# define pwrite aio_pwrite	744	# define pwrite eio__pwrite
490		745
491	/*	746	static ssize_t
492	* make our pread/pwrite safe against themselves, but not against	747	eio__pread (int fd, void *buf, size_t count, off_t offset)
493	* normal read/write by using a mutex. slows down execution a lot,
494	* but that's your problem, not mine.
495	*/
496	static mutex_t preadwritelock = X_MUTEX_INIT;
497
498	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
499	{	748	{
500	ssize_t res;	749	ssize_t res;
501	off_t ooffset;	750	off_t ooffset;
502		751
503	X_LOCK (preadwritelock);	752	X_LOCK (preadwritelock);
…		…
508	X_UNLOCK (preadwritelock);	757	X_UNLOCK (preadwritelock);
509		758
510	return res;	759	return res;
511	}	760	}
512		761
513	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)
514	{	764	{
515	ssize_t res;	765	ssize_t res;
516	off_t ooffset;	766	off_t ooffset;
517		767
518	X_LOCK (preadwritelock);	768	X_LOCK (preadwritelock);
…		…
526	}	776	}
527	#endif	777	#endif
528		778
529	#ifndef HAVE_FUTIMES	779	#ifndef HAVE_FUTIMES
530		780
		781	# undef utimes
		782	# undef futimes
531	# define utimes(path,times) aio_utimes (path, times)	783	# define utimes(path,times) eio__utimes (path, times)
532	# define futimes(fd,times) aio_futimes (fd, times)	784	# define futimes(fd,times) eio__futimes (fd, times)
533		785
		786	static int
534	static int aio_utimes (const char *filename, const struct timeval times[2])	787	eio__utimes (const char *filename, const struct timeval times[2])
535	{	788	{
536	if (times)	789	if (times)
537	{	790	{
538	struct utimbuf buf;	791	struct utimbuf buf;
539		792
…		…
544	}	797	}
545	else	798	else
546	return utime (filename, 0);	799	return utime (filename, 0);
547	}	800	}
548		801
549	static int aio_futimes (int fd, const struct timeval tv[2])	802	static int eio__futimes (int fd, const struct timeval tv[2])
550	{	803	{
551	errno = ENOSYS;	804	errno = ENOSYS;
552	return -1;	805	return -1;
553	}	806	}
554		807
555	#endif	808	#endif
556		809
557	#if !HAVE_FDATASYNC	810	#if !HAVE_FDATASYNC
		811	# undef fdatasync
558	# define fdatasync fsync	812	# define fdatasync(fd) fsync (fd)
559	#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	}
560		842
561	#if !HAVE_READAHEAD	843	#if !HAVE_READAHEAD
		844	# undef readahead
562	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	845	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
563		846
		847	static ssize_t
564	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)
565	{	849	{
566	size_t todo = count;	850	size_t todo = count;
567	dBUF;	851	dBUF;
568		852
569	while (todo > 0)	853	while (todo > 0)
…		…
579	return count;	863	return count;
580	}	864	}
581		865
582	#endif	866	#endif
583		867
584	#if !HAVE_READDIR_R
585	# define readdir_r aio_readdir_r
586
587	static mutex_t readdirlock = X_MUTEX_INIT;
588
589	static int readdir_r (DIR *dirp, X_DIRENT *ent, X_DIRENT **res)
590	{
591	X_DIRENT *e;
592	int errorno;
593
594	X_LOCK (readdirlock);
595
596	e = readdir (dirp);
597	errorno = errno;
598
599	if (e)
600	{
601	*res = ent;
602	strcpy (ent->d_name, e->d_name);
603	}
604	else
605	*res = 0;
606
607	X_UNLOCK (readdirlock);
608
609	errno = errorno;
610	return e ? 0 : -1;
611	}
612	#endif
613
614	/* sendfile always needs emulation */	868	/* sendfile always needs emulation */
		869	static ssize_t
615	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)
616	{	871	{
617	ssize_t res;	872	ssize_t res;
618		873
619	if (!count)	874	if (!count)
620	return 0;	875	return 0;
…		…
703		958
704	return res;	959	return res;
705	}	960	}
706		961
707	/* read a full directory */	962	/* read a full directory */
		963	static void
708	static void scandir_ (eio_req *req, worker *self)	964	eio__scandir (eio_req *req, etp_worker *self)
709	{	965	{
710	DIR *dirp;	966	DIR *dirp;
711	union
712	{
713	EIO_STRUCT_DIRENT d;
714	char b [offsetof (EIO_STRUCT_DIRENT, d_name) + NAME_MAX + 1];
715	} *u;
716	EIO_STRUCT_DIRENT *entp;	967	EIO_STRUCT_DIRENT *entp;
717	char *name, *names;	968	char *name, *names;
718	int memlen = 4096;	969	int memlen = 4096;
719	int memofs = 0;	970	int memofs = 0;
720	int res = 0;	971	int res = 0;
721		972
722	X_LOCK (wrklock);	973	X_LOCK (wrklock);
		974	/* the corresponding closedir is in ETP_WORKER_CLEAR */
723	self->dirp = dirp = opendir (req->ptr1);	975	self->dirp = dirp = opendir (req->ptr1);
724	self->dbuf = u = malloc (sizeof (*u));
725	req->flags |= EIO_FLAG_PTR2_FREE;	976	req->flags |= EIO_FLAG_PTR2_FREE;
726	req->ptr2 = names = malloc (memlen);	977	req->ptr2 = names = malloc (memlen);
727	X_UNLOCK (wrklock);	978	X_UNLOCK (wrklock);
728		979
729	if (dirp && u && names)	980	if (dirp && names)
730	for (;;)	981	for (;;)
731	{	982	{
732	errno = 0;	983	errno = 0;
733	readdir_r (dirp, &u->d, &entp);	984	entp = readdir (dirp);
734		985
735	if (!entp)	986	if (!entp)
736	break;	987	break;
737		988
738	name = entp->d_name;	989	name = entp->d_name;
…		…
763	res = -1;	1014	res = -1;
764		1015
765	req->result = res;	1016	req->result = res;
766	}	1017	}
767		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
768	/*****************************************************************************/	1049	/*****************************************************************************/
769		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
770	X_THREAD_PROC (eio_proc)	1066	X_THREAD_PROC (etp_proc)
771	{	1067	{
772	eio_req *req;	1068	ETP_REQ *req;
773	struct timespec ts;	1069	struct timespec ts;
774	worker *self = (worker *)thr_arg;	1070	etp_worker *self = (etp_worker *)thr_arg;
775		1071
776	/* try to distribute timeouts somewhat randomly */	1072	/* try to distribute timeouts somewhat randomly */
777	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1073	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
778		1074
779	for (;;)	1075	for (;;)
780	{	1076	{
781	ts.tv_sec = time (0) + IDLE_TIMEOUT;
782
783	X_LOCK (reqlock);	1077	X_LOCK (reqlock);
784		1078
785	for (;;)	1079	for (;;)
786	{	1080	{
787	self->req = req = reqq_shift (&req_queue);	1081	self->req = req = reqq_shift (&req_queue);
…		…
789	if (req)	1083	if (req)
790	break;	1084	break;
791		1085
792	++idle;	1086	++idle;
793		1087
		1088	ts.tv_sec = time (0) + IDLE_TIMEOUT;
794	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1089	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
795	{	1090	{
796	if (idle > max_idle)	1091	if (idle > max_idle)
797	{	1092	{
798	--idle;	1093	--idle;
…		…
803	goto quit;	1098	goto quit;
804	}	1099	}
805		1100
806	/* we are allowed to idle, so do so without any timeout */	1101	/* we are allowed to idle, so do so without any timeout */
807	X_COND_WAIT (reqwait, reqlock);	1102	X_COND_WAIT (reqwait, reqlock);
808	ts.tv_sec = time (0) + IDLE_TIMEOUT;
809	}	1103	}
810		1104
811	--idle;	1105	--idle;
812	}	1106	}
813		1107
814	--nready;	1108	--nready;
815		1109
816	X_UNLOCK (reqlock);	1110	X_UNLOCK (reqlock);
817		1111
818	errno = 0; /* strictly unnecessary */	1112	if (req->type < 0)
		1113	goto quit;
819		1114
820	if (!EIO_CANCELLED (req))	1115	if (!EIO_CANCELLED (req))
821	switch (req->type)	1116	ETP_EXECUTE (self, req);
822	{
823	case EIO_READ: req->result = req->offs >= 0
824	? pread (req->int1, req->ptr2, req->size, req->offs)
825	: read (req->int1, req->ptr2, req->size); break;
826	case EIO_WRITE: req->result = req->offs >= 0
827	? pwrite (req->int1, req->ptr2, req->size, req->offs)
828	: write (req->int1, req->ptr2, req->size); break;
829
830	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
831	case EIO_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
832
833	case EIO_STAT: req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
834	case EIO_LSTAT: req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
835	case EIO_FSTAT: req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
836
837	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
838	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
839	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
840	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
841	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
842	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
843
844	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
845	case EIO_CLOSE: req->result = close (req->int1); break;
846	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
847	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
848	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
849	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
850	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
851	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
852	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
853	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
854	case EIO_READLINK: req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
855
856	case EIO_SYNC: req->result = 0; sync (); break;
857	case EIO_FSYNC: req->result = fsync (req->int1); break;
858	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
859
860	case EIO_READDIR: scandir_ (req, self); break;
861
862	case EIO_BUSY:
863	#ifdef _WIN32
864	Sleep (req->nv1 * 1000.);
865	#else
866	{
867	struct timeval tv;
868
869	tv.tv_sec = req->nv1;
870	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
871
872	req->result = select (0, 0, 0, 0, &tv);
873	}
874	#endif
875	break;
876
877	case EIO_UTIME:
878	case EIO_FUTIME:
879	{
880	struct timeval tv[2];
881	struct timeval *times;
882
883	if (req->nv1 != -1. || req->nv2 != -1.)
884	{
885	tv[0].tv_sec = req->nv1;
886	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
887	tv[1].tv_sec = req->nv2;
888	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
889
890	times = tv;
891	}
892	else
893	times = 0;
894
895
896	req->result = req->type == EIO_FUTIME
897	? futimes (req->int1, times)
898	: utimes (req->ptr1, times);
899	}
900
901	case EIO_GROUP:
902	case EIO_NOP:
903	break;
904
905	case EIO_QUIT:
906	goto quit;
907
908	default:
909	req->result = -1;
910	break;
911	}
912
913	req->errorno = errno;
914		1117
915	X_LOCK (reslock);	1118	X_LOCK (reslock);
916		1119
917	++npending;	1120	++npending;
918		1121
919	if (!reqq_push (&res_queue, req) && want_poll_cb)	1122	if (!reqq_push (&res_queue, req) && want_poll_cb)
920	want_poll_cb ();	1123	want_poll_cb ();
921		1124
922	self->req = 0;	1125	self->req = 0;
923	worker_clear (self);	1126	etp_worker_clear (self);
924		1127
925	X_UNLOCK (reslock);	1128	X_UNLOCK (reslock);
926	}	1129	}
927		1130
928	quit:	1131	quit:
929	X_LOCK (wrklock);	1132	X_LOCK (wrklock);
930	worker_free (self);	1133	etp_worker_free (self);
931	X_UNLOCK (wrklock);	1134	X_UNLOCK (wrklock);
932		1135
933	return 0;	1136	return 0;
934	}	1137	}
935		1138
936	/*****************************************************************************/	1139	/*****************************************************************************/
937		1140
938	static void eio_atfork_prepare (void)	1141	int eio_init (void (*want_poll)(void), void (*done_poll)(void))
939	{	1142	{
940	X_LOCK (wrklock);	1143	return etp_init (want_poll, done_poll);
941	X_LOCK (reqlock);
942	X_LOCK (reslock);
943	#if !HAVE_PREADWRITE
944	X_LOCK (preadwritelock);
945	#endif
946	#if !HAVE_READDIR_R
947	X_LOCK (readdirlock);
948	#endif
949	}	1144	}
950		1145
951	static void eio_atfork_parent (void)	1146	static void eio_api_destroy (eio_req *req)
952	{	1147	{
953	#if !HAVE_READDIR_R	1148	free (req);
954	X_UNLOCK (readdirlock);
955	#endif
956	#if !HAVE_PREADWRITE
957	X_UNLOCK (preadwritelock);
958	#endif
959	X_UNLOCK (reslock);
960	X_UNLOCK (reqlock);
961	X_UNLOCK (wrklock);
962	}	1149	}
963		1150
964	static void eio_atfork_child (void)	1151	#define REQ(rtype) \
965	{	1152	eio_req *req; \
966	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;
967		1163
968	while (prv = reqq_shift (&req_queue))	1164	#define SEND eio_submit (req); return req
969	eio_destroy (prv);
970		1165
971	while (prv = reqq_shift (&res_queue))	1166	#define PATH \
972	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	}
973		1174
974	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)
975	{	1180	{
976	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;
977		1188
978	if (wrk->req)	1189	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
979	eio_destroy (wrk->req);	1190	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break;
980		1191
981	worker_clear (wrk);	1192	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
982	worker_free (wrk);	1193	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
983	}	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;
984		1198
985	started = 0;	1199	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
986	idle = 0;	1200	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
987	nreqs = 0;	1201	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
988	nready = 0;	1202	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
989	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;
990		1205
991	eio_atfork_parent ();	1206	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
992	}	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;
993		1216
994	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	1217	case EIO_READLINK: ALLOC (NAME_MAX);
995	{	1218	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
996	want_poll_cb = want_poll;
997	done_poll_cb = done_poll;
998		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:
999	#ifdef _WIN32	1230	#ifdef _WIN32
1000	X_MUTEX_CHECK (wrklock);	1231	Sleep (req->nv1 * 1000.);
1001	X_MUTEX_CHECK (reslock);	1232	#else
1002	X_MUTEX_CHECK (reqlock);
1003	X_MUTEX_CHECK (reqwait);
1004	X_MUTEX_CHECK (preadwritelock);
1005	X_MUTEX_CHECK (readdirlock);
1006
1007	X_COND_CHECK (reqwait);
1008	#endif
1009
1010	X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);
1011	}
1012
1013	#if 0
1014
1015	eio_req *eio_fsync (int fd, eio_cb cb);
1016	eio_req *eio_fdatasync (int fd, eio_cb cb);
1017	eio_req *eio_dupclose (int fd, eio_cb cb);
1018	eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb);
1019	eio_req *eio_read (int fd, off_t offs, size_t length, char *data, eio_cb cb);
1020	eio_req *eio_write (int fd, off_t offs, size_t length, char *data, eio_cb cb);
1021	eio_req *eio_fstat (int fd, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */
1022	eio_req *eio_futime (int fd, double atime, double mtime, eio_cb cb);
1023	eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb);
1024	eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb);
1025	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb);
1026	eio_req *eio_dup2 (int fd, int fd2, eio_cb cb);
1027	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb);
1028	eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb);
1029	eio_req *eio_readlink (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */
1030	eio_req *eio_stat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */
1031	eio_req *eio_lstat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */
1032	eio_req *eio_utime (const char *path, double atime, double mtime, eio_cb cb);
1033	eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb);
1034	eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb);
1035	eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb);
1036	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb);
1037	eio_req *eio_unlink (const char *path, eio_cb cb);
1038	eio_req *eio_rmdir (const char *path, eio_cb cb);
1039	eio_req *eio_readdir (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */
1040	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb);
1041	eio_req *eio_busy (double delay, eio_cb cb); /* ties a thread for this long, simulating busyness */
1042	eio_req *eio_nop (eio_cb cb); /* does nothing except go through the whole process */
1043	void
1044	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1045	PROTOTYPE: $$$;$
1046	PPCODE:
1047	{
1048	dREQ;
1049
1050	req->type = EIO_OPEN;
1051	req->sv1 = newSVsv (pathname);
1052	req->ptr1 = SvPVbyte_nolen (req->sv1);
1053	req->int1 = flags;
1054	req->int2 = mode;
1055
1056	EIO_SEND;
1057	}
1058
1059	void
1060	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1061	PROTOTYPE: $;$
1062	ALIAS:
1063	aio_fsync = EIO_FSYNC
1064	aio_fdatasync = EIO_FDATASYNC
1065	PPCODE:
1066	{
1067	dREQ;
1068
1069	req->type = ix;
1070	req->sv1 = newSVsv (fh);
1071	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1072
1073	EIO_SEND (req);
1074	}
1075
1076	void
1077	aio_close (SV *fh, SV *callback=&PL_sv_undef)
1078	PROTOTYPE: $;$
1079	PPCODE:
1080	{
1081	dREQ;
1082
1083	req->type = EIO_CLOSE;
1084	req->sv1 = newSVsv (fh);
1085	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1086
1087	EIO_SEND (req);
1088	}
1089
1090	void
1091	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1092	ALIAS:
1093	aio_read = EIO_READ
1094	aio_write = EIO_WRITE
1095	PROTOTYPE: $$$$$;$
1096	PPCODE:
1097	{
1098	STRLEN svlen;
1099	char *svptr = SvPVbyte (data, svlen);
1100	UV len = SvUV (length);
1101
1102	SvUPGRADE (data, SVt_PV);
1103	SvPOK_on (data);
1104
1105	if (dataoffset < 0)
1106	dataoffset += svlen;
1107
1108	if (dataoffset < 0 || dataoffset > svlen)
1109	croak ("dataoffset outside of data scalar");
1110
1111	if (ix == EIO_WRITE)
1112	{
1113	/* write: check length and adjust. */
1114	if (!SvOK (length) || len + dataoffset > svlen)
1115	len = svlen - dataoffset;
1116	}
1117	else
1118	{
1119	/* read: grow scalar as necessary */
1120	svptr = SvGROW (data, len + dataoffset + 1);
1121	}
1122
1123	if (len < 0)
1124	croak ("length must not be negative");
1125
1126	{	1233	{
1127	dREQ;	1234	struct timeval tv;
1128		1235
1129	req->type = ix;	1236	tv.tv_sec = req->nv1;
1130	req->sv1 = newSVsv (fh);	1237	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
1131	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1132	: IoOFP (sv_2io (fh)));
1133	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1134	req->size = len;
1135	req->sv2 = SvREFCNT_inc (data);
1136	req->ptr2 = (char *)svptr + dataoffset;
1137	req->stroffset = dataoffset;
1138		1238
1139	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.)
1140	{	1251	{
1141	SvREADONLY_on (data);	1252	tv[0].tv_sec = req->nv1;
1142	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;
1143	}	1258	}
		1259	else
		1260	times = 0;
1144		1261
1145	EIO_SEND;	1262
		1263	req->result = req->type == EIO_FUTIME
		1264	? futimes (req->int1, times)
		1265	: utimes (req->ptr1, times);
1146	}	1266	}
1147	}	1267	break;
1148		1268
1149	void	1269	case EIO_GROUP:
1150	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)	1270	abort (); /* handled in eio_request */
1151	PROTOTYPE: $$;$
1152	PPCODE:
1153	{
1154	SV *data;
1155	dREQ;
1156		1271
1157	data = newSV (NAME_MAX);	1272	case EIO_NOP:
1158	SvPOK_on (data);	1273	req->result = 0;
		1274	break;
1159		1275
1160	req->type = EIO_READLINK;	1276	case EIO_CUSTOM:
1161	req->sv1 = newSVsv (path);	1277	((void (*)(eio_req *))req->feed) (req);
1162	req->ptr1 = SvPVbyte_nolen (req->sv1);	1278	break;
1163	req->sv2 = data;
1164	req->ptr2 = SvPVbyte_nolen (data);
1165		1279
1166	EIO_SEND;	1280	default:
1167	}	1281	req->result = -1;
		1282	break;
		1283	}
1168		1284
1169	void	1285	req->errorno = errno;
1170	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1171	PROTOTYPE: $$$$;$
1172	PPCODE:
1173	{
1174	dREQ;
1175
1176	req->type = EIO_SENDFILE;
1177	req->sv1 = newSVsv (out_fh);
1178	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1179	req->sv2 = newSVsv (in_fh);
1180	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1181	req->offs = SvVAL64 (in_offset);
1182	req->size = length;
1183
1184	EIO_SEND;
1185	}	1286	}
1186		1287
1187	void	1288	#ifndef EIO_NO_WRAPPERS
1188	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1189	PROTOTYPE: $$$;$
1190	PPCODE:
1191	{
1192	dREQ;
1193		1289
1194	req->type = EIO_READAHEAD;	1290	eio_req *eio_nop (int pri, eio_cb cb, void *data)
1195	req->sv1 = newSVsv (fh);
1196	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1197	req->offs = SvVAL64 (offset);
1198	req->size = length;
1199
1200	EIO_SEND;
1201	}
1202
1203	void
1204	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1205	ALIAS:
1206	aio_stat = EIO_STAT
1207	aio_lstat = EIO_LSTAT
1208	PPCODE:
1209	{	1291	{
1210	dREQ;	1292	REQ (EIO_NOP); SEND;
		1293	}
1211		1294
1212	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));	1295	eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
1213	if (!req->ptr2)	1296	{
1214	{	1297	REQ (EIO_BUSY); req->nv1 = delay; SEND;
1215	req_destroy (req);	1298	}
1216	croak ("out of memory during aio_stat statdata allocation");
1217	}
1218		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
1219	req->flags |= FLAG_PTR2_FREE;	1461	req->flags |= EIO_FLAG_PTR2_FREE;
1220	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	}
1221		1468
1222	if (SvPOK (fh_or_path))	1469	SEND;
1223	{
1224	req->type = ix;
1225	req->ptr1 = SvPVbyte_nolen (req->sv1);
1226	}
1227	else
1228	{
1229	req->type = EIO_FSTAT;
1230	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1231	}
1232
1233	EIO_SEND;
1234	}	1470	}
1235		1471
1236	void	1472	eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1237	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
1238	PPCODE:
1239	{	1473	{
1240	dREQ;	1474	return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
1241
1242	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1243	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1244	req->sv1 = newSVsv (fh_or_path);
1245
1246	if (SvPOK (fh_or_path))
1247	{
1248	req->type = EIO_UTIME;
1249	req->ptr1 = SvPVbyte_nolen (req->sv1);
1250	}
1251	else
1252	{
1253	req->type = EIO_FUTIME;
1254	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1255	}
1256
1257	EIO_SEND;
1258	}	1475	}
1259		1476
1260	void	1477	eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1261	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
1262	PPCODE:
1263	{	1478	{
1264	dREQ;	1479	return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
1265
1266	req->sv1 = newSVsv (fh_or_path);
1267	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1268
1269	if (SvPOK (fh_or_path))
1270	{
1271	req->type = EIO_TRUNCATE;
1272	req->ptr1 = SvPVbyte_nolen (req->sv1);
1273	}
1274	else
1275	{
1276	req->type = EIO_FTRUNCATE;
1277	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1278	}
1279
1280	EIO_SEND;
1281	}	1480	}
1282		1481
1283	void	1482	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1284	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
1285	ALIAS:
1286	aio_chmod = EIO_CHMOD
1287	aio_fchmod = EIO_FCHMOD
1288	aio_mkdir = EIO_MKDIR
1289	PPCODE:
1290	{	1483	{
1291	dREQ;	1484	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
1292
1293	req->type = type;
1294	req->int2 = mode;
1295	req->sv1 = newSVsv (fh_or_path);
1296
1297	if (ix == EIO_FCHMOD)
1298	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1299	else
1300	req->ptr1 = SvPVbyte_nolen (req->sv1);
1301
1302	EIO_SEND;
1303	}	1485	}
1304		1486
1305	void	1487	eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data)
1306	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
1307	PPCODE:
1308	{	1488	{
1309	dREQ;	1489	REQ (EIO_CUSTOM); req->feed = (void (*)(eio_req *))execute; SEND;
1310
1311	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1312	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1313	req->sv1 = newSVsv (fh_or_path);
1314
1315	if (SvPOK (fh_or_path))
1316	{
1317	req->type = EIO_CHOWN;
1318	req->ptr1 = SvPVbyte_nolen (req->sv1);
1319	}
1320	else
1321	{
1322	req->type = EIO_FCHOWN;
1323	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1324	}
1325
1326	EIO_SEND;
1327	}	1490	}
1328		1491
1329	void
1330	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1331	ALIAS:
1332	aio_unlink = EIO_UNLINK
1333	aio_rmdir = EIO_RMDIR
1334	aio_readdir = EIO_READDIR
1335	PPCODE:
1336	{
1337	dREQ;
1338
1339	req->type = ix;
1340	req->sv1 = newSVsv (pathname);
1341	req->ptr1 = SvPVbyte_nolen (req->sv1);
1342
1343	EIO_SEND;
1344	}
1345
1346	void
1347	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1348	ALIAS:
1349	aio_link = EIO_LINK
1350	aio_symlink = EIO_SYMLINK
1351	aio_rename = EIO_RENAME
1352	PPCODE:
1353	{
1354	dREQ;
1355
1356	req->type = ix;
1357	req->sv1 = newSVsv (oldpath);
1358	req->ptr1 = SvPVbyte_nolen (req->sv1);
1359	req->sv2 = newSVsv (newpath);
1360	req->ptr2 = SvPVbyte_nolen (req->sv2);
1361
1362	EIO_SEND;
1363	}
1364
1365	void
1366	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1367	PPCODE:
1368	{
1369	dREQ;
1370
1371	req->type = EIO_MKNOD;
1372	req->sv1 = newSVsv (pathname);
1373	req->ptr1 = SvPVbyte_nolen (req->sv1);
1374	req->int2 = (mode_t)mode;
1375	req->offs = dev;
1376
1377	EIO_SEND;
1378	}
1379
1380	void
1381	aio_busy (double delay, SV *callback=&PL_sv_undef)
1382	PPCODE:
1383	{
1384	dREQ;
1385
1386	req->type = EIO_BUSY;
1387	req->nv1 = delay < 0. ? 0. : delay;
1388
1389	EIO_SEND;
1390	}
1391
1392	void
1393	aio_group (SV *callback=&PL_sv_undef)
1394	PROTOTYPE: ;$
1395	PPCODE:
1396	{
1397	dREQ;
1398
1399	req->type = EIO_GROUP;
1400
1401	req_send (req);
1402	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1403	}
1404
1405	void
1406	aio_nop (SV *callback=&PL_sv_undef)
1407	ALIAS:
1408	aio_nop = EIO_NOP
1409	aio_sync = EIO_SYNC
1410	PPCODE:
1411	{
1412	dREQ;
1413
1414	#endif	1492	#endif
		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 */
1415		1507
1416	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)	1508	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1417	{	1509	{
1418	grp->int2 = limit;	1510	grp->int2 = limit;
1419	grp->feed = feed;	1511	grp->feed = feed;
…		…
1430		1522
1431	void eio_grp_add (eio_req *grp, eio_req *req)	1523	void eio_grp_add (eio_req *grp, eio_req *req)
1432	{	1524	{
1433	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));
1434		1526
		1527	grp->flags |= EIO_FLAG_GROUPADD;
		1528
1435	++grp->size;	1529	++grp->size;
1436	req->grp = grp;	1530	req->grp = grp;
1437		1531
1438	req->grp_prev = 0;	1532	req->grp_prev = 0;
1439	req->grp_next = grp->grp_first;	1533	req->grp_next = grp->grp_first;
…		…
1442	grp->grp_first->grp_prev = req;	1536	grp->grp_first->grp_prev = req;
1443		1537
1444	grp->grp_first = req;	1538	grp->grp_first = req;
1445	}	1539	}
1446		1540
		1541	/*****************************************************************************/
		1542	/* misc garbage */
1447		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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