ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/libeio/eio.c

Comparing libeio/eio.c (file contents):
Revision 1.2 by root, Sat May 10 23:33:40 2008 UTC vs.
Revision 1.30 by root, Wed Jun 3 12:24:49 2009 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"
		41
		42	#ifdef EIO_STACKSIZE
		43	# define XTHREAD_STACKSIZE EIO_STACKSIZE
		44	#endif
2	#include "xthread.h"	45	#include "xthread.h"
3		46
4	#include <errno.h>	47	#include <errno.h>
5
6	#include "EXTERN.h"
7	#include "perl.h"
8	#include "XSUB.h"
9
10	#include <stddef.h>	48	#include <stddef.h>
11	#include <stdlib.h>	49	#include <stdlib.h>
		50	#include <string.h>
12	#include <errno.h>	51	#include <errno.h>
13	#include <sys/types.h>	52	#include <sys/types.h>
14	#include <sys/stat.h>	53	#include <sys/stat.h>
15	#include <limits.h>	54	#include <limits.h>
16	#include <fcntl.h>	55	#include <fcntl.h>
17	#include <sched.h>	56	#include <assert.h>
18		57
19	#ifndef EIO_FINISH	58	#ifndef EIO_FINISH
20	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0	59	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
21	#endif	60	#endif
22		61
…		…
38	# include <sys/time.h>	77	# include <sys/time.h>
39	# include <sys/select.h>	78	# include <sys/select.h>
40	# include <unistd.h>	79	# include <unistd.h>
41	# include <utime.h>	80	# include <utime.h>
42	# include <signal.h>	81	# include <signal.h>
		82	# include <dirent.h>
43		83
44	# ifndef EIO_STRUCT_DIRENT	84	# ifndef EIO_STRUCT_DIRENT
45	# define EIO_STRUCT_DIRENT struct dirent	85	# define EIO_STRUCT_DIRENT struct dirent
46	# endif	86	# endif
47		87
48	#endif	88	#endif
49
50	# ifndef EIO_STRUCT_STAT
51	# define EIO_STRUCT_STAT struct stat
52	# endif
53		89
54	#if HAVE_SENDFILE	90	#if HAVE_SENDFILE
55	# if __linux	91	# if __linux
56	# include <sys/sendfile.h>	92	# include <sys/sendfile.h>
57	# elif __freebsd	93	# elif __freebsd
…		…
77	/* buffer size for various temporary buffers */	113	/* buffer size for various temporary buffers */
78	#define EIO_BUFSIZE 65536	114	#define EIO_BUFSIZE 65536
79		115
80	#define dBUF \	116	#define dBUF \
81	char *eio_buf; \	117	char *eio_buf; \
82	X_LOCK (wrklock); \	118	ETP_WORKER_LOCK (self); \
83	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	119	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \
84	X_UNLOCK (wrklock); \	120	ETP_WORKER_UNLOCK (self); \
		121	errno = ENOMEM; \
85	if (!eio_buf) \	122	if (!eio_buf) \
86	return -1;	123	return -1;
87		124
88	#define EIO_TICKS ((1000000 + 1023) >> 10)	125	#define EIO_TICKS ((1000000 + 1023) >> 10)
89		126
		127	/*****************************************************************************/
		128
		129	#if __GNUC__ >= 3
		130	# define expect(expr,value) __builtin_expect ((expr),(value))
		131	#else
		132	# define expect(expr,value) (expr)
		133	#endif
		134
		135	#define expect_false(expr) expect ((expr) != 0, 0)
		136	#define expect_true(expr) expect ((expr) != 0, 1)
		137
		138	/*****************************************************************************/
		139
		140	#define ETP_PRI_MIN EIO_PRI_MIN
		141	#define ETP_PRI_MAX EIO_PRI_MAX
		142
		143	struct etp_worker;
		144
		145	#define ETP_REQ eio_req
		146	#define ETP_DESTROY(req) eio_destroy (req)
		147	static int eio_finish (eio_req *req);
		148	#define ETP_FINISH(req) eio_finish (req)
		149	static void eio_execute (struct etp_worker *self, eio_req *req);
		150	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)
		151
		152	#define ETP_WORKER_CLEAR(req) \
		153	if (wrk->dbuf) \
		154	{ \
		155	free (wrk->dbuf); \
		156	wrk->dbuf = 0; \
		157	} \
		158	\
		159	if (wrk->dirp) \
		160	{ \
		161	closedir (wrk->dirp); \
		162	wrk->dirp = 0; \
		163	}
		164	#define ETP_WORKER_COMMON \
		165	void *dbuf; \
		166	DIR *dirp;
		167
		168	/*****************************************************************************/
		169
		170	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
		171
		172	/* calculcate time difference in ~1/EIO_TICKS of a second */
		173	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		174	{
		175	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
		176	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		177	}
		178
		179	static unsigned int started, idle, wanted = 4;
		180
90	static void (*want_poll_cb) (void);	181	static void (*want_poll_cb) (void);
91	static void (*done_poll_cb) (void);	182	static void (*done_poll_cb) (void);
92		183
93	static unsigned int max_poll_time = 0;	184	static unsigned int max_poll_time; /* reslock */
94	static unsigned int max_poll_reqs = 0;	185	static unsigned int max_poll_reqs; /* reslock */
95		186
96	/* calculcate time difference in ~1/EIO_TICKS of a second */	187	static volatile unsigned int nreqs; /* reqlock */
97	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	188	static volatile unsigned int nready; /* reqlock */
98	{	189	static volatile unsigned int npending; /* reqlock */
99	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	190	static volatile unsigned int max_idle = 4;
100	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
101	}
102		191
103	static unsigned int started, idle, wanted;
104
105	/* worker threads management */
106	static mutex_t wrklock = X_MUTEX_INIT;	192	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;	193	static mutex_t reslock = X_MUTEX_INIT;
149	static mutex_t reqlock = X_MUTEX_INIT;	194	static mutex_t reqlock = X_MUTEX_INIT;
150	static cond_t reqwait = X_COND_INIT;	195	static cond_t reqwait = X_COND_INIT;
151		196
		197	#if !HAVE_PREADWRITE
		198	/*
		199	* make our pread/pwrite emulation safe against themselves, but not against
		200	* normal read/write by using a mutex. slows down execution a lot,
		201	* but that's your problem, not mine.
		202	*/
		203	static mutex_t preadwritelock = X_MUTEX_INIT;
		204	#endif
		205
		206	typedef struct etp_worker
		207	{
		208	/* locked by wrklock */
		209	struct etp_worker *prev, *next;
		210
		211	thread_t tid;
		212
		213	/* locked by reslock, reqlock or wrklock */
		214	ETP_REQ *req; /* currently processed request */
		215
		216	ETP_WORKER_COMMON
		217	} etp_worker;
		218
		219	static etp_worker wrk_first = { &wrk_first, &wrk_first, 0 }; /* NOT etp */
		220
		221	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
		222	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
		223
		224	/* worker threads management */
		225
		226	static void etp_worker_clear (etp_worker *wrk)
		227	{
		228	ETP_WORKER_CLEAR (wrk);
		229	}
		230
		231	static void etp_worker_free (etp_worker *wrk)
		232	{
		233	wrk->next->prev = wrk->prev;
		234	wrk->prev->next = wrk->next;
		235
		236	free (wrk);
		237	}
		238
152	unsigned int eio_nreqs (void)	239	static unsigned int etp_nreqs (void)
153	{	240	{
		241	int retval;
		242	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		243	retval = nreqs;
		244	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
154	return nreqs;	245	return retval;
155	}	246	}
156		247
157	unsigned int eio_nready (void)	248	static unsigned int etp_nready (void)
158	{	249	{
159	unsigned int retval;	250	unsigned int retval;
160		251
161	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	252	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
162	retval = nready;	253	retval = nready;
163	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	254	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
164		255
165	return retval;	256	return retval;
166	}	257	}
167		258
168	unsigned int eio_npending (void)	259	static unsigned int etp_npending (void)
169	{	260	{
170	unsigned int retval;	261	unsigned int retval;
171		262
172	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	263	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
173	retval = npending;	264	retval = npending;
174	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	265	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
175		266
176	return retval;	267	return retval;
177	}	268	}
178		269
179	unsigned int eio_nthreads (void)	270	static unsigned int etp_nthreads (void)
180	{	271	{
181	unsigned int retval;	272	unsigned int retval;
182		273
183	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	274	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
184	retval = started;	275	retval = started;
…		…
191	* a somewhat faster data structure might be nice, but	282	* a somewhat faster data structure might be nice, but
192	* with 8 priorities this actually needs <20 insns	283	* with 8 priorities this actually needs <20 insns
193	* per shift, the most expensive operation.	284	* per shift, the most expensive operation.
194	*/	285	*/
195	typedef struct {	286	typedef struct {
196	eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */	287	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
197	int size;	288	int size;
198	} reqq;	289	} etp_reqq;
199		290
200	static reqq req_queue;	291	static etp_reqq req_queue;
201	static reqq res_queue;	292	static etp_reqq res_queue;
202		293
203	static int reqq_push (reqq *q, eio_req *req)	294	static int reqq_push (etp_reqq *q, ETP_REQ *req)
204	{	295	{
205	int pri = req->pri;	296	int pri = req->pri;
206	req->next = 0;	297	req->next = 0;
207		298
208	if (q->qe[pri])	299	if (q->qe[pri])
…		…
214	q->qe[pri] = q->qs[pri] = req;	305	q->qe[pri] = q->qs[pri] = req;
215		306
216	return q->size++;	307	return q->size++;
217	}	308	}
218		309
219	static eio_req *reqq_shift (reqq *q)	310	static ETP_REQ *reqq_shift (etp_reqq *q)
220	{	311	{
221	int pri;	312	int pri;
222		313
223	if (!q->size)	314	if (!q->size)
224	return 0;	315	return 0;
225		316
226	--q->size;	317	--q->size;
227		318
228	for (pri = EIO_NUM_PRI; pri--; )	319	for (pri = ETP_NUM_PRI; pri--; )
229	{	320	{
230	eio_req *req = q->qs[pri];	321	eio_req *req = q->qs[pri];
231		322
232	if (req)	323	if (req)
233	{	324	{
…		…
239	}	330	}
240		331
241	abort ();	332	abort ();
242	}	333	}
243		334
244	static void grp_try_feed (eio_req *grp)	335	static void etp_atfork_prepare (void)
245	{	336	{
246	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	337	X_LOCK (wrklock);
		338	X_LOCK (reqlock);
		339	X_LOCK (reslock);
		340	#if !HAVE_PREADWRITE
		341	X_LOCK (preadwritelock);
		342	#endif
		343	}
		344
		345	static void etp_atfork_parent (void)
		346	{
		347	#if !HAVE_PREADWRITE
		348	X_UNLOCK (preadwritelock);
		349	#endif
		350	X_UNLOCK (reslock);
		351	X_UNLOCK (reqlock);
		352	X_UNLOCK (wrklock);
		353	}
		354
		355	static void etp_atfork_child (void)
		356	{
		357	ETP_REQ *prv;
		358
		359	while ((prv = reqq_shift (&req_queue)))
		360	ETP_DESTROY (prv);
		361
		362	while ((prv = reqq_shift (&res_queue)))
		363	ETP_DESTROY (prv);
		364
		365	while (wrk_first.next != &wrk_first)
247	{	366	{
248	int old_len = grp->size;	367	etp_worker *wrk = wrk_first.next;
249		368
250	EIO_FEED (grp);	369	if (wrk->req)
		370	ETP_DESTROY (wrk->req);
251		371
252	/* stop if no progress has been made */	372	etp_worker_clear (wrk);
253	if (old_len == grp->size)	373	etp_worker_free (wrk);
254	{
255	grp->feed = 0;
256	break;
257	}
258	}	374	}
259	}
260		375
261	static int eio_finish (eio_req *req);	376	started = 0;
		377	idle = 0;
		378	nreqs = 0;
		379	nready = 0;
		380	npending = 0;
262		381
263	static int grp_dec (eio_req *grp)	382	etp_atfork_parent ();
264	{	383	}
265	--grp->size;
266		384
267	/* call feeder, if applicable */	385	static void
268	grp_try_feed (grp);	386	etp_once_init (void)
		387	{
		388	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
		389	}
269		390
270	/* finish, if done */	391	static int
271	if (!grp->size && grp->int1)	392	etp_init (void (*want_poll)(void), void (*done_poll)(void))
272	return eio_finish (grp);	393	{
273	else	394	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
		395
		396	pthread_once (&doinit, etp_once_init);
		397
		398	want_poll_cb = want_poll;
		399	done_poll_cb = done_poll;
		400
274	return 0;	401	return 0;
275	}	402	}
276		403
277	void eio_destroy (eio_req *req)
278	{
279	if ((req)->flags & EIO_FLAG_PTR2_FREE)
280	free (req->ptr2);
281
282	EIO_DESTROY (req);
283	}
284
285	static int eio_finish (eio_req *req)
286	{
287	int res = EIO_FINISH (req);
288
289	if (req->grp)
290	{
291	int res2;
292	eio_req *grp = req->grp;
293
294	/* unlink request */
295	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
296	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
297
298	if (grp->grp_first == req)
299	grp->grp_first = req->grp_next;
300
301	res2 = grp_dec (grp);
302
303	if (!res && res2)
304	res = res2;
305	}
306
307	eio_destroy (req);
308
309	return res;
310	}
311
312	void eio_grp_cancel (eio_req *grp)
313	{
314	for (grp = grp->grp_first; grp; grp = grp->grp_next)
315	eio_cancel (grp);
316	}
317
318	void eio_cancel (eio_req *req)
319	{
320	req->flags |= EIO_FLAG_CANCELLED;
321
322	eio_grp_cancel (req);
323	}
324
325	X_THREAD_PROC (eio_proc);	404	X_THREAD_PROC (etp_proc);
326		405
327	static void start_thread (void)	406	static void etp_start_thread (void)
328	{	407	{
329	worker *wrk = calloc (1, sizeof (worker));	408	etp_worker *wrk = calloc (1, sizeof (etp_worker));
330		409
331	if (!wrk)	410	/*TODO*/
332	croak ("unable to allocate worker thread data");	411	assert (("unable to allocate worker thread data", wrk));
333		412
334	X_LOCK (wrklock);	413	X_LOCK (wrklock);
335		414
336	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))	415	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
337	{	416	{
338	wrk->prev = &wrk_first;	417	wrk->prev = &wrk_first;
339	wrk->next = wrk_first.next;	418	wrk->next = wrk_first.next;
340	wrk_first.next->prev = wrk;	419	wrk_first.next->prev = wrk;
341	wrk_first.next = wrk;	420	wrk_first.next = wrk;
…		…
345	free (wrk);	424	free (wrk);
346		425
347	X_UNLOCK (wrklock);	426	X_UNLOCK (wrklock);
348	}	427	}
349		428
350	static void maybe_start_thread (void)	429	static void etp_maybe_start_thread (void)
351	{	430	{
352	if (eio_nthreads () >= wanted)	431	if (expect_true (etp_nthreads () >= wanted))
353	return;	432	return;
354		433
355	/* todo: maybe use idle here, but might be less exact */	434	/* todo: maybe use idle here, but might be less exact */
356	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())	435	if (expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
357	return;	436	return;
358		437
359	start_thread ();	438	etp_start_thread ();
360	}	439	}
361		440
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)	441	static void etp_end_thread (void)
376	{	442	{
377	eio_req *req = calloc (1, sizeof (eio_req));	443	eio_req *req = calloc (1, sizeof (eio_req));
378		444
379	req->type = EIO_QUIT;	445	req->type = -1;
380	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	446	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
381		447
382	X_LOCK (reqlock);	448	X_LOCK (reqlock);
383	reqq_push (&req_queue, req);	449	reqq_push (&req_queue, req);
384	X_COND_SIGNAL (reqwait);	450	X_COND_SIGNAL (reqwait);
385	X_UNLOCK (reqlock);	451	X_UNLOCK (reqlock);
…		…
387	X_LOCK (wrklock);	453	X_LOCK (wrklock);
388	--started;	454	--started;
389	X_UNLOCK (wrklock);	455	X_UNLOCK (wrklock);
390	}	456	}
391		457
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)	458	static int etp_poll (void)
429	{	459	{
430	int maxreqs = max_poll_reqs;	460	unsigned int maxreqs;
		461	unsigned int maxtime;
431	struct timeval tv_start, tv_now;	462	struct timeval tv_start, tv_now;
432	eio_req *req;
433		463
		464	X_LOCK (reslock);
		465	maxreqs = max_poll_reqs;
		466	maxtime = max_poll_time;
		467	X_UNLOCK (reslock);
		468
434	if (max_poll_time)	469	if (maxtime)
435	gettimeofday (&tv_start, 0);	470	gettimeofday (&tv_start, 0);
436		471
437	for (;;)	472	for (;;)
438	{	473	{
		474	ETP_REQ *req;
		475
439	maybe_start_thread ();	476	etp_maybe_start_thread ();
440		477
441	X_LOCK (reslock);	478	X_LOCK (reslock);
442	req = reqq_shift (&res_queue);	479	req = reqq_shift (&res_queue);
443		480
444	if (req)	481	if (req)
…		…
452	X_UNLOCK (reslock);	489	X_UNLOCK (reslock);
453		490
454	if (!req)	491	if (!req)
455	return 0;	492	return 0;
456		493
		494	X_LOCK (reqlock);
457	--nreqs;	495	--nreqs;
		496	X_UNLOCK (reqlock);
458		497
459	if (req->type == EIO_GROUP && req->size)	498	if (expect_false (req->type == EIO_GROUP && req->size))
460	{	499	{
461	req->int1 = 1; /* mark request as delayed */	500	req->int1 = 1; /* mark request as delayed */
462	continue;	501	continue;
463	}	502	}
464	else	503	else
465	{	504	{
466	int res = eio_finish (req);	505	int res = ETP_FINISH (req);
467	if (res)	506	if (expect_false (res))
468	return res;	507	return res;
469	}	508	}
470		509
471	if (maxreqs && !--maxreqs)	510	if (expect_false (maxreqs && !--maxreqs))
472	break;	511	break;
473		512
474	if (max_poll_time)	513	if (maxtime)
475	{	514	{
476	gettimeofday (&tv_now, 0);	515	gettimeofday (&tv_now, 0);
477		516
478	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)	517	if (tvdiff (&tv_start, &tv_now) >= maxtime)
479	break;	518	break;
480	}	519	}
481	}	520	}
482		521
483	errno = EAGAIN;	522	errno = EAGAIN;
484	return -1;	523	return -1;
485	}	524	}
486		525
		526	static void etp_cancel (ETP_REQ *req)
		527	{
		528	X_LOCK (wrklock);
		529	req->flags |= EIO_FLAG_CANCELLED;
		530	X_UNLOCK (wrklock);
		531
		532	eio_grp_cancel (req);
		533	}
		534
		535	static void etp_submit (ETP_REQ *req)
		536	{
		537	req->pri -= ETP_PRI_MIN;
		538
		539	if (expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
		540	if (expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
		541
		542	if (expect_false (req->type == EIO_GROUP))
		543	{
		544	/* I hope this is worth it :/ */
		545	X_LOCK (reqlock);
		546	++nreqs;
		547	X_UNLOCK (reqlock);
		548
		549	X_LOCK (reslock);
		550
		551	++npending;
		552
		553	if (!reqq_push (&res_queue, req) && want_poll_cb)
		554	want_poll_cb ();
		555
		556	X_UNLOCK (reslock);
		557	}
		558	else
		559	{
		560	X_LOCK (reqlock);
		561	++nreqs;
		562	++nready;
		563	reqq_push (&req_queue, req);
		564	X_COND_SIGNAL (reqwait);
		565	X_UNLOCK (reqlock);
		566
		567	etp_maybe_start_thread ();
		568	}
		569	}
		570
		571	static void etp_set_max_poll_time (double nseconds)
		572	{
		573	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		574	max_poll_time = nseconds;
		575	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		576	}
		577
		578	static void etp_set_max_poll_reqs (unsigned int maxreqs)
		579	{
		580	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		581	max_poll_reqs = maxreqs;
		582	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		583	}
		584
		585	static void etp_set_max_idle (unsigned int nthreads)
		586	{
		587	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		588	max_idle = nthreads <= 0 ? 1 : nthreads;
		589	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		590	}
		591
		592	static void etp_set_min_parallel (unsigned int nthreads)
		593	{
		594	if (wanted < nthreads)
		595	wanted = nthreads;
		596	}
		597
		598	static void etp_set_max_parallel (unsigned int nthreads)
		599	{
		600	if (wanted > nthreads)
		601	wanted = nthreads;
		602
		603	while (started > wanted)
		604	etp_end_thread ();
		605	}
		606
		607	/*****************************************************************************/
		608
		609	static void grp_try_feed (eio_req *grp)
		610	{
		611	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
		612	{
		613	grp->flags &= ~EIO_FLAG_GROUPADD;
		614
		615	EIO_FEED (grp);
		616
		617	/* stop if no progress has been made */
		618	if (!(grp->flags & EIO_FLAG_GROUPADD))
		619	{
		620	grp->feed = 0;
		621	break;
		622	}
		623	}
		624	}
		625
		626	static int grp_dec (eio_req *grp)
		627	{
		628	--grp->size;
		629
		630	/* call feeder, if applicable */
		631	grp_try_feed (grp);
		632
		633	/* finish, if done */
		634	if (!grp->size && grp->int1)
		635	return eio_finish (grp);
		636	else
		637	return 0;
		638	}
		639
		640	void eio_destroy (eio_req *req)
		641	{
		642	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
		643	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
		644
		645	EIO_DESTROY (req);
		646	}
		647
		648	static int eio_finish (eio_req *req)
		649	{
		650	int res = EIO_FINISH (req);
		651
		652	if (req->grp)
		653	{
		654	int res2;
		655	eio_req *grp = req->grp;
		656
		657	/* unlink request */
		658	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		659	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		660
		661	if (grp->grp_first == req)
		662	grp->grp_first = req->grp_next;
		663
		664	res2 = grp_dec (grp);
		665
		666	if (!res && res2)
		667	res = res2;
		668	}
		669
		670	eio_destroy (req);
		671
		672	return res;
		673	}
		674
		675	void eio_grp_cancel (eio_req *grp)
		676	{
		677	for (grp = grp->grp_first; grp; grp = grp->grp_next)
		678	eio_cancel (grp);
		679	}
		680
		681	void eio_cancel (eio_req *req)
		682	{
		683	etp_cancel (req);
		684	}
		685
		686	void eio_submit (eio_req *req)
		687	{
		688	etp_submit (req);
		689	}
		690
		691	unsigned int eio_nreqs (void)
		692	{
		693	return etp_nreqs ();
		694	}
		695
		696	unsigned int eio_nready (void)
		697	{
		698	return etp_nready ();
		699	}
		700
		701	unsigned int eio_npending (void)
		702	{
		703	return etp_npending ();
		704	}
		705
		706	unsigned int eio_nthreads (void)
		707	{
		708	return etp_nthreads ();
		709	}
		710
		711	void eio_set_max_poll_time (double nseconds)
		712	{
		713	etp_set_max_poll_time (nseconds);
		714	}
		715
		716	void eio_set_max_poll_reqs (unsigned int maxreqs)
		717	{
		718	etp_set_max_poll_reqs (maxreqs);
		719	}
		720
		721	void eio_set_max_idle (unsigned int nthreads)
		722	{
		723	etp_set_max_idle (nthreads);
		724	}
		725
		726	void eio_set_min_parallel (unsigned int nthreads)
		727	{
		728	etp_set_min_parallel (nthreads);
		729	}
		730
		731	void eio_set_max_parallel (unsigned int nthreads)
		732	{
		733	etp_set_max_parallel (nthreads);
		734	}
		735
		736	int eio_poll (void)
		737	{
		738	return etp_poll ();
		739	}
		740
487	/*****************************************************************************/	741	/*****************************************************************************/
488	/* work around various missing functions */	742	/* work around various missing functions */
489		743
490	#if !HAVE_PREADWRITE	744	#if !HAVE_PREADWRITE
		745	# undef pread
		746	# undef pwrite
491	# define pread aio_pread	747	# define pread eio__pread
492	# define pwrite aio_pwrite	748	# define pwrite eio__pwrite
493		749
494	/*	750	static ssize_t
495	* make our pread/pwrite safe against themselves, but not against	751	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	{	752	{
503	ssize_t res;	753	ssize_t res;
504	off_t ooffset;	754	off_t ooffset;
505		755
506	X_LOCK (preadwritelock);	756	X_LOCK (preadwritelock);
…		…
511	X_UNLOCK (preadwritelock);	761	X_UNLOCK (preadwritelock);
512		762
513	return res;	763	return res;
514	}	764	}
515		765
516	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	766	static ssize_t
		767	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
517	{	768	{
518	ssize_t res;	769	ssize_t res;
519	off_t ooffset;	770	off_t ooffset;
520		771
521	X_LOCK (preadwritelock);	772	X_LOCK (preadwritelock);
522	ooffset = lseek (fd, 0, SEEK_CUR);	773	ooffset = lseek (fd, 0, SEEK_CUR);
523	lseek (fd, offset, SEEK_SET);	774	lseek (fd, offset, SEEK_SET);
524	res = write (fd, buf, count);	775	res = write (fd, buf, count);
525	lseek (fd, offset, SEEK_SET);	776	lseek (fd, ooffset, SEEK_SET);
526	X_UNLOCK (preadwritelock);	777	X_UNLOCK (preadwritelock);
527		778
528	return res;	779	return res;
529	}	780	}
530	#endif	781	#endif
531		782
532	#ifndef HAVE_FUTIMES	783	#ifndef HAVE_FUTIMES
533		784
		785	# undef utimes
		786	# undef futimes
534	# define utimes(path,times) aio_utimes (path, times)	787	# define utimes(path,times) eio__utimes (path, times)
535	# define futimes(fd,times) aio_futimes (fd, times)	788	# define futimes(fd,times) eio__futimes (fd, times)
536		789
		790	static int
537	static int aio_utimes (const char *filename, const struct timeval times[2])	791	eio__utimes (const char *filename, const struct timeval times[2])
538	{	792	{
539	if (times)	793	if (times)
540	{	794	{
541	struct utimbuf buf;	795	struct utimbuf buf;
542		796
…		…
547	}	801	}
548	else	802	else
549	return utime (filename, 0);	803	return utime (filename, 0);
550	}	804	}
551		805
552	static int aio_futimes (int fd, const struct timeval tv[2])	806	static int eio__futimes (int fd, const struct timeval tv[2])
553	{	807	{
554	errno = ENOSYS;	808	errno = ENOSYS;
555	return -1;	809	return -1;
556	}	810	}
557		811
558	#endif	812	#endif
559		813
560	#if !HAVE_FDATASYNC	814	#if !HAVE_FDATASYNC
		815	# undef fdatasync
561	# define fdatasync fsync	816	# define fdatasync(fd) fsync (fd)
562	#endif	817	#endif
		818
		819	/* sync_file_range always needs emulation */
		820	int
		821	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
		822	{
		823	#if HAVE_SYNC_FILE_RANGE
		824	int res;
		825
		826	if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE
		827	|| EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE
		828	|| EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER)
		829	{
		830	flags = 0
		831	| (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0)
		832	| (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0)
		833	| (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0);
		834	}
		835
		836	res = sync_file_range (fd, offset, nbytes, flags);
		837
		838	if (!res || errno != ENOSYS)
		839	return res;
		840	#endif
		841
		842	/* even though we could play tricks with the flags, it's better to always
		843	* call fdatasync, as thta matches the expectation of it's users best */
		844	return fdatasync (fd);
		845	}
563		846
564	#if !HAVE_READAHEAD	847	#if !HAVE_READAHEAD
		848	# undef readahead
565	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	849	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
566		850
		851	static ssize_t
567	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)	852	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
568	{	853	{
569	size_t todo = count;	854	size_t todo = count;
570	dBUF;	855	dBUF;
571		856
572	while (todo > 0)	857	while (todo > 0)
573	{	858	{
574	size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE;	859	size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE;
575		860
576	pread (fd, aio_buf, len, offset);	861	pread (fd, eio_buf, len, offset);
577	offset += len;	862	offset += len;
578	todo -= len;	863	todo -= len;
579	}	864	}
580		865
581	errno = 0;	866	errno = 0;
582	return count;	867	return count;
583	}	868	}
584		869
585	#endif	870	#endif
586		871
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 */	872	/* sendfile always needs emulation */
		873	static ssize_t
618	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)	874	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)
619	{	875	{
620	ssize_t res;	876	ssize_t res;
621		877
622	if (!count)	878	if (!count)
623	return 0;	879	return 0;
…		…
706		962
707	return res;	963	return res;
708	}	964	}
709		965
710	/* read a full directory */	966	/* read a full directory */
		967	static void
711	static void scandir_ (eio_req *req, worker *self)	968	eio__scandir (eio_req *req, etp_worker *self)
712	{	969	{
713	DIR *dirp;	970	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;	971	EIO_STRUCT_DIRENT *entp;
720	char *name, *names;	972	char *name, *names;
721	int memlen = 4096;	973	int memlen = 4096;
722	int memofs = 0;	974	int memofs = 0;
723	int res = 0;	975	int res = 0;
724		976
725	X_LOCK (wrklock);	977	X_LOCK (wrklock);
		978	/* the corresponding closedir is in ETP_WORKER_CLEAR */
726	self->dirp = dirp = opendir (req->ptr1);	979	self->dirp = dirp = opendir (req->ptr1);
727	self->dbuf = u = malloc (sizeof (*u));
728	req->flags |= EIO_FLAG_PTR2_FREE;	980	req->flags |= EIO_FLAG_PTR2_FREE;
729	req->ptr2 = names = malloc (memlen);	981	req->ptr2 = names = malloc (memlen);
730	X_UNLOCK (wrklock);	982	X_UNLOCK (wrklock);
731		983
732	if (dirp && u && names)	984	if (dirp && names)
733	for (;;)	985	for (;;)
734	{	986	{
735	errno = 0;	987	errno = 0;
736	readdir_r (dirp, &u->d, &entp);	988	entp = readdir (dirp);
737		989
738	if (!entp)	990	if (!entp)
739	break;	991	break;
740		992
741	name = entp->d_name;	993	name = entp->d_name;
…		…
766	res = -1;	1018	res = -1;
767		1019
768	req->result = res;	1020	req->result = res;
769	}	1021	}
770		1022
		1023	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
		1024	# undef msync
		1025	# define msync(a,b,c) ((errno = ENOSYS), -1)
		1026	#endif
		1027
		1028	int
		1029	eio__mtouch (void *mem, size_t len, int flags)
		1030	{
		1031	intptr_t addr = (intptr_t)mem;
		1032	intptr_t end = addr + len;
		1033	#ifdef PAGESIZE
		1034	const intptr_t page = PAGESIZE;
		1035	#else
		1036	static intptr_t page;
		1037
		1038	if (!page)
		1039	page = sysconf (_SC_PAGESIZE);
		1040	#endif
		1041
		1042	addr &= ~(page - 1); /* assume page size is always a power of two */
		1043
		1044	if (addr < end)
		1045	if (flags) /* modify */
		1046	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len);
		1047	else
		1048	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len);
		1049
		1050	return 0;
		1051	}
		1052
771	/*****************************************************************************/	1053	/*****************************************************************************/
772		1054
		1055	#define ALLOC(len) \
		1056	if (!req->ptr2) \
		1057	{ \
		1058	X_LOCK (wrklock); \
		1059	req->flags |= EIO_FLAG_PTR2_FREE; \
		1060	X_UNLOCK (wrklock); \
		1061	req->ptr2 = malloc (len); \
		1062	if (!req->ptr2) \
		1063	{ \
		1064	errno = ENOMEM; \
		1065	req->result = -1; \
		1066	break; \
		1067	} \
		1068	}
		1069
773	X_THREAD_PROC (eio_proc)	1070	X_THREAD_PROC (etp_proc)
774	{	1071	{
775	eio_req *req;	1072	ETP_REQ *req;
776	struct timespec ts;	1073	struct timespec ts;
777	worker *self = (worker *)thr_arg;	1074	etp_worker *self = (etp_worker *)thr_arg;
778		1075
779	/* try to distribute timeouts somewhat randomly */	1076	/* try to distribute timeouts somewhat randomly */
780	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1077	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
781		1078
782	for (;;)	1079	for (;;)
783	{	1080	{
784	ts.tv_sec = time (0) + IDLE_TIMEOUT;
785
786	X_LOCK (reqlock);	1081	X_LOCK (reqlock);
787		1082
788	for (;;)	1083	for (;;)
789	{	1084	{
790	self->req = req = reqq_shift (&req_queue);	1085	self->req = req = reqq_shift (&req_queue);
…		…
792	if (req)	1087	if (req)
793	break;	1088	break;
794		1089
795	++idle;	1090	++idle;
796		1091
		1092	ts.tv_sec = time (0) + IDLE_TIMEOUT;
797	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1093	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
798	{	1094	{
799	if (idle > max_idle)	1095	if (idle > max_idle)
800	{	1096	{
801	--idle;	1097	--idle;
…		…
806	goto quit;	1102	goto quit;
807	}	1103	}
808		1104
809	/* we are allowed to idle, so do so without any timeout */	1105	/* we are allowed to idle, so do so without any timeout */
810	X_COND_WAIT (reqwait, reqlock);	1106	X_COND_WAIT (reqwait, reqlock);
811	ts.tv_sec = time (0) + IDLE_TIMEOUT;
812	}	1107	}
813		1108
814	--idle;	1109	--idle;
815	}	1110	}
816		1111
817	--nready;	1112	--nready;
818		1113
819	X_UNLOCK (reqlock);	1114	X_UNLOCK (reqlock);
820		1115
821	errno = 0; /* strictly unnecessary */	1116	if (req->type < 0)
		1117	goto quit;
822		1118
823	if (!EIO_CANCELLED (req))	1119	if (!EIO_CANCELLED (req))
824	switch (req->type)	1120	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		1121
918	X_LOCK (reslock);	1122	X_LOCK (reslock);
919		1123
920	++npending;	1124	++npending;
921		1125
922	if (!reqq_push (&res_queue, req) && want_poll_cb)	1126	if (!reqq_push (&res_queue, req) && want_poll_cb)
923	want_poll_cb ();	1127	want_poll_cb ();
924		1128
925	self->req = 0;	1129	self->req = 0;
926	worker_clear (self);	1130	etp_worker_clear (self);
927		1131
928	X_UNLOCK (reslock);	1132	X_UNLOCK (reslock);
929	}	1133	}
930		1134
931	quit:	1135	quit:
932	X_LOCK (wrklock);	1136	X_LOCK (wrklock);
933	worker_free (self);	1137	etp_worker_free (self);
934	X_UNLOCK (wrklock);	1138	X_UNLOCK (wrklock);
935		1139
936	return 0;	1140	return 0;
937	}	1141	}
938		1142
939	/*****************************************************************************/	1143	/*****************************************************************************/
940		1144
941	static void eio_atfork_prepare (void)	1145	int eio_init (void (*want_poll)(void), void (*done_poll)(void))
942	{	1146	{
943	X_LOCK (wrklock);	1147	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	}	1148	}
953		1149
954	static void eio_atfork_parent (void)	1150	static void eio_api_destroy (eio_req *req)
955	{	1151	{
956	#if !HAVE_READDIR_R	1152	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	}	1153	}
966		1154
967	static void eio_atfork_child (void)	1155	#define REQ(rtype) \
968	{	1156	eio_req *req; \
969	eio_req *prv;	1157	\
		1158	req = (eio_req *)calloc (1, sizeof *req); \
		1159	if (!req) \
		1160	return 0; \
		1161	\
		1162	req->type = rtype; \
		1163	req->pri = pri; \
		1164	req->finish = cb; \
		1165	req->data = data; \
		1166	req->destroy = eio_api_destroy;
970		1167
971	while (prv = reqq_shift (&req_queue))	1168	#define SEND eio_submit (req); return req
972	eio_destroy (prv);
973		1169
974	while (prv = reqq_shift (&res_queue))	1170	#define PATH \
975	eio_destroy (prv);	1171	req->flags |= EIO_FLAG_PTR1_FREE; \
		1172	req->ptr1 = strdup (path); \
		1173	if (!req->ptr1) \
		1174	{ \
		1175	eio_api_destroy (req); \
		1176	return 0; \
		1177	}
976		1178
977	while (wrk_first.next != &wrk_first)	1179	static void eio_execute (etp_worker *self, eio_req *req)
		1180	{
		1181	errno = 0;
		1182
		1183	switch (req->type)
978	{	1184	{
979	worker *wrk = wrk_first.next;	1185	case EIO_READ: ALLOC (req->size);
		1186	req->result = req->offs >= 0
		1187	? pread (req->int1, req->ptr2, req->size, req->offs)
		1188	: read (req->int1, req->ptr2, req->size); break;
		1189	case EIO_WRITE: req->result = req->offs >= 0
		1190	? pwrite (req->int1, req->ptr2, req->size, req->offs)
		1191	: write (req->int1, req->ptr2, req->size); break;
980		1192
981	if (wrk->req)	1193	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
982	eio_destroy (wrk->req);	1194	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break;
983		1195
984	worker_clear (wrk);	1196	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
985	worker_free (wrk);	1197	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
986	}	1198	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1199	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1200	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1201	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
987		1202
988	started = 0;	1203	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
989	idle = 0;	1204	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
990	nreqs = 0;	1205	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
991	nready = 0;	1206	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
992	npending = 0;	1207	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		1208	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
993		1209
994	eio_atfork_parent ();	1210	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
995	}	1211	case EIO_CLOSE: req->result = close (req->int1); break;
		1212	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
		1213	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
		1214	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
		1215	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
		1216	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
		1217	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
		1218	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
		1219	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->int3); break;
996		1220
997	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	1221	case EIO_READLINK: ALLOC (NAME_MAX);
998	{	1222	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
999	want_poll_cb = want_poll;
1000	done_poll_cb = done_poll;
1001		1223
		1224	case EIO_SYNC: req->result = 0; sync (); break;
		1225	case EIO_FSYNC: req->result = fsync (req->int1); break;
		1226	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		1227	case EIO_MSYNC: req->result = msync (req->ptr2, req->size, req->int1); break;
		1228	case EIO_MTOUCH: req->result = eio__mtouch (req->ptr2, req->size, req->int1); break;
		1229	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
		1230
		1231	case EIO_READDIR: eio__scandir (req, self); break;
		1232
		1233	case EIO_BUSY:
1002	#ifdef _WIN32	1234	#ifdef _WIN32
1003	X_MUTEX_CHECK (wrklock);	1235	Sleep (req->nv1 * 1000.);
1004	X_MUTEX_CHECK (reslock);	1236	#else
1005	X_MUTEX_CHECK (reqlock);
1006	X_MUTEX_CHECK (reqwait);
1007	X_MUTEX_CHECK (preadwritelock);
1008	X_MUTEX_CHECK (readdirlock);
1009
1010	X_COND_CHECK (reqwait);
1011	#endif
1012
1013	X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);
1014	}
1015
1016	#if 0
1017
1018	eio_req *eio_fsync (int fd, eio_cb cb);
1019	eio_req *eio_fdatasync (int fd, eio_cb cb);
1020	eio_req *eio_dupclose (int fd, eio_cb cb);
1021	eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb);
1022	eio_req *eio_read (int fd, off_t offs, size_t length, char *data, eio_cb cb);
1023	eio_req *eio_write (int fd, off_t offs, size_t length, char *data, eio_cb cb);
1024	eio_req *eio_fstat (int fd, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */
1025	eio_req *eio_futime (int fd, double atime, double mtime, eio_cb cb);
1026	eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb);
1027	eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb);
1028	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb);
1029	eio_req *eio_dup2 (int fd, int fd2, eio_cb cb);
1030	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb);
1031	eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb);
1032	eio_req *eio_readlink (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */
1033	eio_req *eio_stat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */
1034	eio_req *eio_lstat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */
1035	eio_req *eio_utime (const char *path, double atime, double mtime, eio_cb cb);
1036	eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb);
1037	eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb);
1038	eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb);
1039	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb);
1040	eio_req *eio_unlink (const char *path, eio_cb cb);
1041	eio_req *eio_rmdir (const char *path, eio_cb cb);
1042	eio_req *eio_readdir (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */
1043	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb);
1044	eio_req *eio_busy (double delay, eio_cb cb); /* ties a thread for this long, simulating busyness */
1045	eio_req *eio_nop (eio_cb cb); /* does nothing except go through the whole process */
1046	void
1047	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1048	PROTOTYPE: $$$;$
1049	PPCODE:
1050	{
1051	dREQ;
1052
1053	req->type = EIO_OPEN;
1054	req->sv1 = newSVsv (pathname);
1055	req->ptr1 = SvPVbyte_nolen (req->sv1);
1056	req->int1 = flags;
1057	req->int2 = mode;
1058
1059	EIO_SEND;
1060	}
1061
1062	void
1063	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1064	PROTOTYPE: $;$
1065	ALIAS:
1066	aio_fsync = EIO_FSYNC
1067	aio_fdatasync = EIO_FDATASYNC
1068	PPCODE:
1069	{
1070	dREQ;
1071
1072	req->type = ix;
1073	req->sv1 = newSVsv (fh);
1074	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1075
1076	EIO_SEND (req);
1077	}
1078
1079	void
1080	aio_close (SV *fh, SV *callback=&PL_sv_undef)
1081	PROTOTYPE: $;$
1082	PPCODE:
1083	{
1084	dREQ;
1085
1086	req->type = EIO_CLOSE;
1087	req->sv1 = newSVsv (fh);
1088	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1089
1090	EIO_SEND (req);
1091	}
1092
1093	void
1094	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1095	ALIAS:
1096	aio_read = EIO_READ
1097	aio_write = EIO_WRITE
1098	PROTOTYPE: $$$$$;$
1099	PPCODE:
1100	{
1101	STRLEN svlen;
1102	char *svptr = SvPVbyte (data, svlen);
1103	UV len = SvUV (length);
1104
1105	SvUPGRADE (data, SVt_PV);
1106	SvPOK_on (data);
1107
1108	if (dataoffset < 0)
1109	dataoffset += svlen;
1110
1111	if (dataoffset < 0 || dataoffset > svlen)
1112	croak ("dataoffset outside of data scalar");
1113
1114	if (ix == EIO_WRITE)
1115	{
1116	/* write: check length and adjust. */
1117	if (!SvOK (length) || len + dataoffset > svlen)
1118	len = svlen - dataoffset;
1119	}
1120	else
1121	{
1122	/* read: grow scalar as necessary */
1123	svptr = SvGROW (data, len + dataoffset + 1);
1124	}
1125
1126	if (len < 0)
1127	croak ("length must not be negative");
1128
1129	{	1237	{
1130	dREQ;	1238	struct timeval tv;
1131		1239
1132	req->type = ix;	1240	tv.tv_sec = req->nv1;
1133	req->sv1 = newSVsv (fh);	1241	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		1242
1142	if (!SvREADONLY (data))	1243	req->result = select (0, 0, 0, 0, &tv);
		1244	}
		1245	#endif
		1246	break;
		1247
		1248	case EIO_UTIME:
		1249	case EIO_FUTIME:
		1250	{
		1251	struct timeval tv[2];
		1252	struct timeval *times;
		1253
		1254	if (req->nv1 != -1. || req->nv2 != -1.)
1143	{	1255	{
1144	SvREADONLY_on (data);	1256	tv[0].tv_sec = req->nv1;
1145	req->flags |= FLAG_SV2_RO_OFF;	1257	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1258	tv[1].tv_sec = req->nv2;
		1259	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1260
		1261	times = tv;
1146	}	1262	}
		1263	else
		1264	times = 0;
1147		1265
1148	EIO_SEND;	1266
		1267	req->result = req->type == EIO_FUTIME
		1268	? futimes (req->int1, times)
		1269	: utimes (req->ptr1, times);
1149	}	1270	}
1150	}	1271	break;
1151		1272
1152	void	1273	case EIO_GROUP:
1153	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)	1274	abort (); /* handled in eio_request */
1154	PROTOTYPE: $$;$
1155	PPCODE:
1156	{
1157	SV *data;
1158	dREQ;
1159		1275
1160	data = newSV (NAME_MAX);	1276	case EIO_NOP:
1161	SvPOK_on (data);	1277	req->result = 0;
		1278	break;
1162		1279
1163	req->type = EIO_READLINK;	1280	case EIO_CUSTOM:
1164	req->sv1 = newSVsv (path);	1281	((void (*)(eio_req *))req->feed) (req);
1165	req->ptr1 = SvPVbyte_nolen (req->sv1);	1282	break;
1166	req->sv2 = data;
1167	req->ptr2 = SvPVbyte_nolen (data);
1168		1283
1169	EIO_SEND;	1284	default:
1170	}	1285	req->result = -1;
		1286	break;
		1287	}
1171		1288
1172	void	1289	req->errorno = errno;
1173	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1174	PROTOTYPE: $$$$;$
1175	PPCODE:
1176	{
1177	dREQ;
1178
1179	req->type = EIO_SENDFILE;
1180	req->sv1 = newSVsv (out_fh);
1181	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1182	req->sv2 = newSVsv (in_fh);
1183	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1184	req->offs = SvVAL64 (in_offset);
1185	req->size = length;
1186
1187	EIO_SEND;
1188	}	1290	}
1189		1291
1190	void	1292	#ifndef EIO_NO_WRAPPERS
1191	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1192	PROTOTYPE: $$$;$
1193	PPCODE:
1194	{
1195	dREQ;
1196		1293
1197	req->type = EIO_READAHEAD;	1294	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	{	1295	{
1213	dREQ;	1296	REQ (EIO_NOP); SEND;
		1297	}
1214		1298
1215	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));	1299	eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
1216	if (!req->ptr2)	1300	{
1217	{	1301	REQ (EIO_BUSY); req->nv1 = delay; SEND;
1218	req_destroy (req);	1302	}
1219	croak ("out of memory during aio_stat statdata allocation");
1220	}
1221		1303
		1304	eio_req *eio_sync (int pri, eio_cb cb, void *data)
		1305	{
		1306	REQ (EIO_SYNC); SEND;
		1307	}
		1308
		1309	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
		1310	{
		1311	REQ (EIO_FSYNC); req->int1 = fd; SEND;
		1312	}
		1313
		1314	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		1315	{
		1316	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		1317	}
		1318
		1319	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		1320	{
		1321	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		1322	}
		1323
		1324	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
		1325	{
		1326	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
		1327	}
		1328
		1329	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
		1330	{
		1331	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
		1332	}
		1333
		1334	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
		1335	{
		1336	REQ (EIO_CLOSE); req->int1 = fd; SEND;
		1337	}
		1338
		1339	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
		1340	{
		1341	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
		1342	}
		1343
		1344	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		1345	{
		1346	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		1347	}
		1348
		1349	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		1350	{
		1351	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		1352	}
		1353
		1354	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
		1355	{
		1356	REQ (EIO_FSTAT); req->int1 = fd; SEND;
		1357	}
		1358
		1359	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
		1360	{
		1361	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
		1362	}
		1363
		1364	eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
		1365	{
		1366	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
		1367	}
		1368
		1369	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
		1370	{
		1371	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
		1372	}
		1373
		1374	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
		1375	{
		1376	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
		1377	}
		1378
		1379	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
		1380	{
		1381	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
		1382	}
		1383
		1384	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data)
		1385	{
		1386	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
		1387	}
		1388
		1389	eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
		1390	{
		1391	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
		1392	}
		1393
		1394	eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
		1395	{
		1396	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
		1397	}
		1398
		1399	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
		1400	{
		1401	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
		1402	}
		1403
		1404	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
		1405	{
		1406	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
		1407	}
		1408
		1409	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
		1410	{
		1411	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
		1412	}
		1413
		1414	eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
		1415	{
		1416	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
		1417	}
		1418
		1419	static eio_req *
		1420	eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
		1421	{
		1422	REQ (type); PATH; SEND;
		1423	}
		1424
		1425	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
		1426	{
		1427	return eio__1path (EIO_READLINK, path, pri, cb, data);
		1428	}
		1429
		1430	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
		1431	{
		1432	return eio__1path (EIO_STAT, path, pri, cb, data);
		1433	}
		1434
		1435	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
		1436	{
		1437	return eio__1path (EIO_LSTAT, path, pri, cb, data);
		1438	}
		1439
		1440	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
		1441	{
		1442	return eio__1path (EIO_UNLINK, path, pri, cb, data);
		1443	}
		1444
		1445	eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
		1446	{
		1447	return eio__1path (EIO_RMDIR, path, pri, cb, data);
		1448	}
		1449
		1450	eio_req *eio_readdir (const char *path, int pri, eio_cb cb, void *data)
		1451	{
		1452	return eio__1path (EIO_READDIR, path, pri, cb, data);
		1453	}
		1454
		1455	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
		1456	{
		1457	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int3 = (long)dev; SEND;
		1458	}
		1459
		1460	static eio_req *
		1461	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1462	{
		1463	REQ (type); PATH;
		1464
1222	req->flags |= FLAG_PTR2_FREE;	1465	req->flags |= EIO_FLAG_PTR2_FREE;
1223	req->sv1 = newSVsv (fh_or_path);	1466	req->ptr2 = strdup (new_path);
		1467	if (!req->ptr2)
		1468	{
		1469	eio_api_destroy (req);
		1470	return 0;
		1471	}
1224		1472
1225	if (SvPOK (fh_or_path))	1473	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	}	1474	}
1238		1475
1239	void	1476	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	{	1477	{
1243	dREQ;	1478	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	}	1479	}
1262		1480
1263	void	1481	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	{	1482	{
1267	dREQ;	1483	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	}	1484	}
1285		1485
1286	void	1486	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	{	1487	{
1294	dREQ;	1488	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	}	1489	}
1307		1490
1308	void	1491	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	{	1492	{
1312	dREQ;	1493	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	}	1494	}
1331		1495
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	1496	#endif
		1497
		1498	eio_req *eio_grp (eio_cb cb, void *data)
		1499	{
		1500	const int pri = EIO_PRI_MAX;
		1501
		1502	REQ (EIO_GROUP); SEND;
		1503	}
		1504
		1505	#undef REQ
		1506	#undef PATH
		1507	#undef SEND
		1508
		1509	/*****************************************************************************/
		1510	/* grp functions */
1418		1511
1419	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)	1512	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1420	{	1513	{
1421	grp->int2 = limit;	1514	grp->int2 = limit;
1422	grp->feed = feed;	1515	grp->feed = feed;
…		…
1433		1526
1434	void eio_grp_add (eio_req *grp, eio_req *req)	1527	void eio_grp_add (eio_req *grp, eio_req *req)
1435	{	1528	{
1436	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	1529	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
1437		1530
		1531	grp->flags |= EIO_FLAG_GROUPADD;
		1532
1438	++grp->size;	1533	++grp->size;
1439	req->grp = grp;	1534	req->grp = grp;
1440		1535
1441	req->grp_prev = 0;	1536	req->grp_prev = 0;
1442	req->grp_next = grp->grp_first;	1537	req->grp_next = grp->grp_first;
…		…
1445	grp->grp_first->grp_prev = req;	1540	grp->grp_first->grp_prev = req;
1446		1541
1447	grp->grp_first = req;	1542	grp->grp_first = req;
1448	}	1543	}
1449		1544
		1545	/*****************************************************************************/
		1546	/* misc garbage */
1450		1547
		1548	ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
		1549	{
		1550	etp_worker wrk;
		1551
		1552	wrk.dbuf = 0;
		1553
		1554	eio__sendfile (ofd, ifd, offset, count, &wrk);
		1555
		1556	if (wrk.dbuf)
		1557	free (wrk.dbuf);
		1558	}
		1559

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines