[ViewVC] Diff of: cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.43 by root, Sat Oct 21 23:06:04 2006 UTC vs.
Revision 1.70 by root, Tue Oct 24 15:15:56 2006 UTC

…		…
		1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux
		5	# define _GNU_SOURCE
		6	#endif
		7
1	#define _REENTRANT 1	8	#define _REENTRANT 1
		9
2	#include <errno.h>	10	#include <errno.h>
3		11
4	#include "EXTERN.h"	12	#include "EXTERN.h"
5	#include "perl.h"	13	#include "perl.h"
6	#include "XSUB.h"	14	#include "XSUB.h"
9		17
10	#include <pthread.h>	18	#include <pthread.h>
11		19
12	#include <stddef.h>	20	#include <stddef.h>
13	#include <errno.h>	21	#include <errno.h>
		22	#include <sys/time.h>
		23	#include <sys/select.h>
14	#include <sys/types.h>	24	#include <sys/types.h>
15	#include <sys/stat.h>	25	#include <sys/stat.h>
16	#include <limits.h>	26	#include <limits.h>
17	#include <unistd.h>	27	#include <unistd.h>
18	#include <fcntl.h>	28	#include <fcntl.h>
…		…
39	# define NAME_MAX 4096	49	# define NAME_MAX 4096
40	#endif	50	#endif
41		51
42	#if __ia64	52	#if __ia64
43	# define STACKSIZE 65536	53	# define STACKSIZE 65536
		54	#elif __i386 \|\| __x86_64 /* 16k is unreasonably high :( */
		55	# define STACKSIZE PTHREAD_STACK_MIN
44	#else	56	#else
45	# define STACKSIZE 8192	57	# define STACKSIZE 16384
46	#endif	58	#endif
		59
		60	/* buffer size for various temporary buffers */
		61	#define AIO_BUFSIZE 65536
		62
		63	#define dBUF \
		64	char *aio_buf = malloc (AIO_BUFSIZE); \
		65	if (!aio_buf) \
		66	return -1;
		67
		68	#define fBUF free (aio_buf)
47		69
48	enum {	70	enum {
49	REQ_QUIT,	71	REQ_QUIT,
50	REQ_OPEN, REQ_CLOSE,	72	REQ_OPEN, REQ_CLOSE,
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,	73	REQ_READ, REQ_WRITE, REQ_READAHEAD,
…		…
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	75	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
54	REQ_FSYNC, REQ_FDATASYNC,	76	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	77	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56	REQ_READDIR,	78	REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,	79	REQ_LINK, REQ_SYMLINK,
		80	REQ_GROUP, REQ_NOP,
		81	REQ_BUSY,
58	};	82	};
59		83
60	#define AIO_CB_KLASS "IO::AIO::CB"	84	#define AIO_REQ_KLASS "IO::AIO::REQ"
		85	#define AIO_GRP_KLASS "IO::AIO::GRP"
61		86
62	typedef struct aio_cb	87	typedef struct aio_cb
63	{	88	{
64	struct aio_cb grp_prev, grp_next;
65	struct aio_grp *grp;
66
67	struct aio_cb *volatile next;	89	struct aio_cb *volatile next;
68
69	SV self; / the perl counterpart of this request, if any */
70		90
71	SV data, callback;	91	SV data, callback;
72	SV fh, fh2;	92	SV fh, fh2;
73	void dataptr, data2ptr;	93	void dataptr, data2ptr;
74	Stat_t *statdata;	94	Stat_t *statdata;
75	off_t offset;	95	off_t offset;
76	size_t length;	96	size_t length;
77	ssize_t result;	97	ssize_t result;
78		98
		99	STRLEN dataoffset;
79	int type;	100	int type;
80	int fd, fd2;	101	int fd, fd2;
81	int errorno;	102	int errorno;
82	STRLEN dataoffset;
83	mode_t mode; /* open */	103	mode_t mode; /* open */
		104
84	unsigned char cancelled;	105	unsigned char flags;
		106	unsigned char pri;
		107
		108	SV self; / the perl counterpart of this request, if any */
		109	struct aio_cb grp, grp_prev, grp_next, grp_first;
85	} aio_cb;	110	} aio_cb;
		111
		112	enum {
		113	FLAG_CANCELLED = 0x01,
		114	};
86		115
87	typedef aio_cb *aio_req;	116	typedef aio_cb *aio_req;
88	typedef aio_cb *aio_req_ornot;	117	typedef aio_cb *aio_req_ornot;
		118
		119	enum {
		120	PRI_MIN = -4,
		121	PRI_MAX = 4,
		122
		123	DEFAULT_PRI = 0,
		124	PRI_BIAS = -PRI_MIN,
		125	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		126	};
		127
		128	static int next_pri = DEFAULT_PRI + PRI_BIAS;
89		129
90	static int started, wanted;	130	static int started, wanted;
91	static volatile int nreqs;	131	static volatile int nreqs;
92	static int max_outstanding = 1<<30;	132	static int max_outstanding = 1<<30;
93	static int respipe [2];	133	static int respipe [2];
94		134
		135	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		136	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		137	#else
		138	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		139	#endif
		140
95	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	141	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
96	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	142	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
97	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	143	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
98		144
99	static volatile aio_req reqs, reqe; /* queue start, queue end */	145	/*
100	static volatile aio_req ress, rese; /* queue start, queue end */	146	* a somewhat faster data structure might be nice, but
101		147	* with 8 priorities this actually needs <20 insns
		148	* per shift, the most expensive operation.
		149	*/
102	typedef struct aio_grp	150	typedef struct {
103	{	151	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
104	struct aio_cb first, last;	152	int size;
105	SV *callback;	153	} reqq;
106	int busycount;
107	} aio_grp;
108		154
109	static void aio_grp_begin (aio_grp *grp)	155	static reqq req_queue;
110	{	156	static reqq res_queue;
111	++grp->busycount;
112	}
113		157
114	static void aio_grp_end (aio_grp *grp)	158	int reqq_push (reqq *q, aio_req req)
115	{	159	{
116	--grp->busycount;	160	int pri = req->pri;
		161	req->next = 0;
117		162
118	if (grp->busycount)	163	if (q->qe[pri])
		164	{
		165	q->qe[pri]->next = req;
		166	q->qe[pri] = req;
		167	}
		168	else
		169	q->qe[pri] = q->qs[pri] = req;
		170
		171	return q->size++;
		172	}
		173
		174	aio_req reqq_shift (reqq *q)
		175	{
		176	int pri;
		177
		178	if (!q->size)
119	return;	179	return 0;
120		180
121	SvREFCNT_dec (grp->callback);	181	--q->size;
122	grp->callback = 0;
123	}
124		182
125	static aio_grp *aio_grp_new ()	183	for (pri = NUM_PRI; pri--; )
126	{	184	{
127	aio_grp *grp;	185	aio_req req = q->qs[pri];
128		186
129	Newz (0, grp, 1, aio_grp);	187	if (req)
130	aio_grp_begin (grp);	188	{
		189	if (!(q->qs[pri] = req->next))
		190	q->qe[pri] = 0;
131		191
132	return grp;	192	return req;
		193	}
		194	}
		195
		196	abort ();
133	}	197	}
		198
		199	static void req_invoke (aio_req req);
		200	static void req_free (aio_req req);
134		201
135	/* must be called at most once */	202	/* must be called at most once */
136	static SV *req_sv (aio_req req)	203	static SV req_sv (aio_req req, const char klass)
137	{	204	{
		205	if (!req->self)
		206	{
138	req->self = (SV *)newHV ();	207	req->self = (SV *)newHV ();
139	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	208	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		209	}
140		210
141	return sv_bless (newRV_noinc (req->self), gv_stashpv (AIO_CB_KLASS, 1));	211	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
142	}	212	}
143		213
144	static aio_req SvAIO_REQ (SV *sv)	214	static aio_req SvAIO_REQ (SV *sv)
145	{	215	{
		216	MAGIC *mg;
		217
146	if (!sv_derived_from (sv, AIO_CB_KLASS) \|\| !SvROK (sv))	218	if (!sv_derived_from (sv, AIO_REQ_KLASS) \|\| !SvROK (sv))
147	croak ("object of class " AIO_CB_KLASS " expected");	219	croak ("object of class " AIO_REQ_KLASS " expected");
148		220
149	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	221	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
150		222
151	return mg ? (aio_req)mg->mg_ptr : 0;	223	return mg ? (aio_req)mg->mg_ptr : 0;
		224	}
		225
		226	static void aio_grp_feed (aio_req grp)
		227	{
		228	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		229	{
		230	int old_len = grp->length;
		231
		232	if (grp->fh2 && SvOK (grp->fh2))
		233	{
		234	dSP;
		235
		236	ENTER;
		237	SAVETMPS;
		238	PUSHMARK (SP);
		239	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		240	PUTBACK;
		241	call_sv (grp->fh2, G_VOID \| G_EVAL \| G_KEEPERR);
		242	SPAGAIN;
		243	FREETMPS;
		244	LEAVE;
		245	}
		246
		247	/* stop if no progress has been made */
		248	if (old_len == grp->length)
		249	{
		250	SvREFCNT_dec (grp->fh2);
		251	grp->fh2 = 0;
		252	break;
		253	}
		254	}
		255	}
		256
		257	static void aio_grp_dec (aio_req grp)
		258	{
		259	--grp->length;
		260
		261	/* call feeder, if applicable */
		262	aio_grp_feed (grp);
		263
		264	/* finish, if done */
		265	if (!grp->length && grp->fd)
		266	{
		267	req_invoke (grp);
		268	req_free (grp);
		269	}
		270	}
		271
		272	static void poll_wait ()
		273	{
		274	fd_set rfd;
		275
		276	while (nreqs)
		277	{
		278	int size;
		279	#if !(__i386 \|\| __x86_64) /* safe without sempahore on this archs */
		280	pthread_mutex_lock (&reslock);
		281	#endif
		282	size = res_queue.size;
		283	#if !(__i386 \|\| __x86_64) /* safe without sempahore on this archs */
		284	pthread_mutex_unlock (&reslock);
		285	#endif
		286
		287	if (size)
		288	return;
		289
		290	FD_ZERO(&rfd);
		291	FD_SET(respipe [0], &rfd);
		292
		293	select (respipe [0] + 1, &rfd, 0, 0, 0);
		294	}
		295	}
		296
		297	static void req_invoke (aio_req req)
		298	{
		299	dSP;
		300
		301	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		302	{
		303	errno = req->errorno;
		304
		305	ENTER;
		306	SAVETMPS;
		307	PUSHMARK (SP);
		308	EXTEND (SP, 1);
		309
		310	switch (req->type)
		311	{
		312	case REQ_READDIR:
		313	{
		314	SV *rv = &PL_sv_undef;
		315
		316	if (req->result >= 0)
		317	{
		318	char *buf = req->data2ptr;
		319	AV *av = newAV ();
		320
		321	while (req->result)
		322	{
		323	SV *sv = newSVpv (buf, 0);
		324
		325	av_push (av, sv);
		326	buf += SvCUR (sv) + 1;
		327	req->result--;
		328	}
		329
		330	rv = sv_2mortal (newRV_noinc ((SV *)av));
		331	}
		332
		333	PUSHs (rv);
		334	}
		335	break;
		336
		337	case REQ_OPEN:
		338	{
		339	/* convert fd to fh */
		340	SV *fh;
		341
		342	PUSHs (sv_2mortal (newSViv (req->result)));
		343	PUTBACK;
		344	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
		345	SPAGAIN;
		346
		347	fh = SvREFCNT_inc (POPs);
		348
		349	PUSHMARK (SP);
		350	XPUSHs (sv_2mortal (fh));
		351	}
		352	break;
		353
		354	case REQ_GROUP:
		355	req->fd = 2; /* mark group as finished */
		356
		357	if (req->data)
		358	{
		359	int i;
		360	AV av = (AV )req->data;
		361
		362	EXTEND (SP, AvFILL (av) + 1);
		363	for (i = 0; i <= AvFILL (av); ++i)
		364	PUSHs (*av_fetch (av, i, 0));
		365	}
		366	break;
		367
		368	case REQ_NOP:
		369	case REQ_BUSY:
		370	break;
		371
		372	default:
		373	PUSHs (sv_2mortal (newSViv (req->result)));
		374	break;
		375	}
		376
		377
		378	PUTBACK;
		379	call_sv (req->callback, G_VOID \| G_EVAL);
		380	SPAGAIN;
		381
		382	FREETMPS;
		383	LEAVE;
		384	}
		385
		386	if (req->grp)
		387	{
		388	aio_req grp = req->grp;
		389
		390	/* unlink request */
		391	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		392	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		393
		394	if (grp->grp_first == req)
		395	grp->grp_first = req->grp_next;
		396
		397	aio_grp_dec (grp);
		398	}
		399
		400	if (SvTRUE (ERRSV))
		401	{
		402	req_free (req);
		403	croak (0);
		404	}
152	}	405	}
153		406
154	static void req_free (aio_req req)	407	static void req_free (aio_req req)
155	{	408	{
156	if (req->self)	409	if (req->self)
157	{	410	{
158	sv_unmagic (req->self, PERL_MAGIC_ext);	411	sv_unmagic (req->self, PERL_MAGIC_ext);
159	SvREFCNT_dec (req->self);	412	SvREFCNT_dec (req->self);
160	}	413	}
161		414
162	if (req->data)
163	SvREFCNT_dec (req->data);	415	SvREFCNT_dec (req->data);
164
165	if (req->fh)
166	SvREFCNT_dec (req->fh);	416	SvREFCNT_dec (req->fh);
167
168	if (req->fh2)
169	SvREFCNT_dec (req->fh2);	417	SvREFCNT_dec (req->fh2);
170
171	if (req->statdata)
172	Safefree (req->statdata);
173
174	if (req->callback)
175	SvREFCNT_dec (req->callback);	418	SvREFCNT_dec (req->callback);
		419	Safefree (req->statdata);
176		420
177	if (req->type == REQ_READDIR && req->result >= 0)	421	if (req->type == REQ_READDIR && req->result >= 0)
178	free (req->data2ptr);	422	free (req->data2ptr);
179		423
180	Safefree (req);	424	Safefree (req);
181	}	425	}
182		426
183	static void	427	static void req_cancel (aio_req req)
184	poll_wait ()
185	{	428	{
186	if (nreqs && !ress)	429	req->flags \|= FLAG_CANCELLED;
187	{
188	fd_set rfd;
189	FD_ZERO(&rfd);
190	FD_SET(respipe [0], &rfd);
191		430
192	select (respipe [0] + 1, &rfd, 0, 0, 0);	431	if (req->type == REQ_GROUP)
193	}	432	{
194	}	433	aio_req sub;
195		434
196	static int	435	for (sub = req->grp_first; sub; sub = sub->grp_next)
197	poll_cb ()	436	req_cancel (sub);
		437	}
		438	}
		439
		440	static int poll_cb ()
198	{	441	{
199	dSP;	442	dSP;
200	int count = 0;	443	int count = 0;
201	int do_croak = 0;	444	int do_croak = 0;
202	aio_req req;	445	aio_req req;
203		446
204	for (;;)	447	for (;;)
205	{	448	{
206	pthread_mutex_lock (&reslock);	449	pthread_mutex_lock (&reslock);
207	req = ress;	450	req = reqq_shift (&res_queue);
208		451
209	if (req)	452	if (req)
210	{	453	{
211	ress = req->next;
212
213	if (!ress)	454	if (!res_queue.size)
214	{	455	{
215	/* read any signals sent by the worker threads */	456	/* read any signals sent by the worker threads */
216	char buf [32];	457	char buf [32];
217	while (read (respipe [0], buf, 32) == 32)	458	while (read (respipe [0], buf, 32) == 32)
218	;	459	;
219
220	rese = 0;
221	}	460	}
222	}	461	}
223		462
224	pthread_mutex_unlock (&reslock);	463	pthread_mutex_unlock (&reslock);
225		464
226	if (!req)	465	if (!req)
227	break;	466	break;
228		467
229	nreqs--;	468	--nreqs;
230		469
231	if (req->type == REQ_QUIT)	470	if (req->type == REQ_QUIT)
232	started--;	471	started--;
		472	else if (req->type == REQ_GROUP && req->length)
		473	{
		474	req->fd = 1; /* mark request as delayed */
		475	continue;
		476	}
233	else	477	else
234	{	478	{
235	int errorno = errno;
236	errno = req->errorno;
237
238	if (req->type == REQ_READ)	479	if (req->type == REQ_READ)
239	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));	480	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
240		481
241	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))	482	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
242	SvREADONLY_off (req->data);	483	SvREADONLY_off (req->data);
…		…
246	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	487	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
247	PL_laststatval = req->result;	488	PL_laststatval = req->result;
248	PL_statcache = *(req->statdata);	489	PL_statcache = *(req->statdata);
249	}	490	}
250		491
251	ENTER;	492	req_invoke (req);
252	PUSHMARK (SP);
253		493
254	if (req->type == REQ_READDIR)
255	{
256	SV *rv = &PL_sv_undef;
257
258	if (req->result >= 0)
259	{
260	char *buf = req->data2ptr;
261	AV *av = newAV ();
262
263	while (req->result)
264	{
265	SV *sv = newSVpv (buf, 0);
266
267	av_push (av, sv);
268	buf += SvCUR (sv) + 1;
269	req->result--;
270	}
271
272	rv = sv_2mortal (newRV_noinc ((SV *)av));
273	}
274
275	XPUSHs (rv);
276	}
277	else
278	{
279	XPUSHs (sv_2mortal (newSViv (req->result)));
280
281	if (req->type == REQ_OPEN)
282	{
283	/* convert fd to fh */
284	SV *fh;
285
286	PUTBACK;
287	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
288	SPAGAIN;
289
290	fh = SvREFCNT_inc (POPs);
291
292	PUSHMARK (SP);
293	XPUSHs (sv_2mortal (fh));
294	}
295	}
296
297	if (SvOK (req->callback) && !req->cancelled)
298	{
299	PUTBACK;
300	call_sv (req->callback, G_VOID \| G_EVAL);
301	SPAGAIN;
302
303	if (SvTRUE (ERRSV))
304	{
305	req_free (req);
306	croak (0);
307	}
308	}
309
310	LEAVE;
311
312	errno = errorno;
313	count++;	494	count++;
314	}	495	}
315		496
316	req_free (req);	497	req_free (req);
317	}	498	}
…		…
319	return count;	500	return count;
320	}	501	}
321		502
322	static void aio_proc(void arg);	503	static void aio_proc(void arg);
323		504
324	static void
325	start_thread (void)	505	static void start_thread (void)
326	{	506	{
327	sigset_t fullsigset, oldsigset;	507	sigset_t fullsigset, oldsigset;
328	pthread_t tid;	508	pthread_t tid;
329	pthread_attr_t attr;	509	pthread_attr_t attr;
330		510
…		…
339	started++;	519	started++;
340		520
341	sigprocmask (SIG_SETMASK, &oldsigset, 0);	521	sigprocmask (SIG_SETMASK, &oldsigset, 0);
342	}	522	}
343		523
344	static void
345	req_send (aio_req req)	524	static void req_send (aio_req req)
346	{	525	{
347	while (started < wanted && nreqs >= started)	526	while (started < wanted && nreqs >= started)
348	start_thread ();	527	start_thread ();
349		528
350	nreqs++;	529	++nreqs;
351		530
352	pthread_mutex_lock (&reqlock);	531	pthread_mutex_lock (&reqlock);
353		532	reqq_push (&req_queue, req);
354	req->next = 0;
355
356	if (reqe)
357	{
358	reqe->next = req;
359	reqe = req;
360	}
361	else
362	reqe = reqs = req;
363
364	pthread_cond_signal (&reqwait);	533	pthread_cond_signal (&reqwait);
365	pthread_mutex_unlock (&reqlock);	534	pthread_mutex_unlock (&reqlock);
366		535
367	if (nreqs > max_outstanding)	536	if (nreqs > max_outstanding)
368	for (;;)	537	for (;;)
…		…
374		543
375	poll_wait ();	544	poll_wait ();
376	}	545	}
377	}	546	}
378		547
379	static void	548	static void end_thread (void)
380	end_thread (void)
381	{	549	{
382	aio_req req;	550	aio_req req;
		551
383	Newz (0, req, 1, aio_cb);	552	Newz (0, req, 1, aio_cb);
		553
384	req->type = REQ_QUIT;	554	req->type = REQ_QUIT;
		555	req->pri = PRI_MAX + PRI_BIAS;
385		556
386	req_send (req);	557	req_send (req);
387	}	558	}
388		559
389	static void min_parallel (int nthreads)	560	static void min_parallel (int nthreads)
…		…
436	* normal read/write by using a mutex. slows down execution a lot,	607	* normal read/write by using a mutex. slows down execution a lot,
437	* but that's your problem, not mine.	608	* but that's your problem, not mine.
438	*/	609	*/
439	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	610	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
440		611
441	static ssize_t	612	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
442	pread (int fd, void *buf, size_t count, off_t offset)
443	{	613	{
444	ssize_t res;	614	ssize_t res;
445	off_t ooffset;	615	off_t ooffset;
446		616
447	pthread_mutex_lock (&preadwritelock);	617	pthread_mutex_lock (&preadwritelock);
…		…
452	pthread_mutex_unlock (&preadwritelock);	622	pthread_mutex_unlock (&preadwritelock);
453		623
454	return res;	624	return res;
455	}	625	}
456		626
457	static ssize_t
458	pwrite (int fd, void *buf, size_t count, off_t offset)	627	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
459	{	628	{
460	ssize_t res;	629	ssize_t res;
461	off_t ooffset;	630	off_t ooffset;
462		631
463	pthread_mutex_lock (&preadwritelock);	632	pthread_mutex_lock (&preadwritelock);
…		…
476	#endif	645	#endif
477		646
478	#if !HAVE_READAHEAD	647	#if !HAVE_READAHEAD
479	# define readahead aio_readahead	648	# define readahead aio_readahead
480		649
481	static ssize_t
482	readahead (int fd, off_t offset, size_t count)	650	static ssize_t readahead (int fd, off_t offset, size_t count)
483	{	651	{
484	char readahead_buf[4096];	652	dBUF;
485		653
486	while (count > 0)	654	while (count > 0)
487	{	655	{
488	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	656	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
489		657
490	pread (fd, readahead_buf, len, offset);	658	pread (fd, aio_buf, len, offset);
491	offset += len;	659	offset += len;
492	count -= len;	660	count -= len;
493	}	661	}
494		662
		663	fBUF;
		664
495	errno = 0;	665	errno = 0;
496	}	666	}
497	#endif	667	#endif
498		668
499	#if !HAVE_READDIR_R	669	#if !HAVE_READDIR_R
500	# define readdir_r aio_readdir_r	670	# define readdir_r aio_readdir_r
501		671
502	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	672	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
503		673
504	static int
505	readdir_r (DIR dirp, struct dirent ent, struct dirent **res)	674	static int readdir_r (DIR dirp, struct dirent ent, struct dirent **res)
506	{	675	{
507	struct dirent *e;	676	struct dirent *e;
508	int errorno;	677	int errorno;
509		678
510	pthread_mutex_lock (&readdirlock);	679	pthread_mutex_lock (&readdirlock);
…		…
526	return e ? 0 : -1;	695	return e ? 0 : -1;
527	}	696	}
528	#endif	697	#endif
529		698
530	/* sendfile always needs emulation */	699	/* sendfile always needs emulation */
531	static ssize_t
532	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	700	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
533	{	701	{
534	ssize_t res;	702	ssize_t res;
535		703
536	if (!count)	704	if (!count)
537	return 0;	705	return 0;
…		…
586	#endif	754	#endif
587	)	755	)
588	)	756	)
589	{	757	{
590	/* emulate sendfile. this is a major pain in the ass */	758	/* emulate sendfile. this is a major pain in the ass */
591	char buf[4096];	759	dBUF;
		760
592	res = 0;	761	res = 0;
593		762
594	while (count)	763	while (count)
595	{	764	{
596	ssize_t cnt;	765	ssize_t cnt;
597		766
598	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	767	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
599		768
600	if (cnt <= 0)	769	if (cnt <= 0)
601	{	770	{
602	if (cnt && !res) res = -1;	771	if (cnt && !res) res = -1;
603	break;	772	break;
604	}	773	}
605		774
606	cnt = write (ofd, buf, cnt);	775	cnt = write (ofd, aio_buf, cnt);
607		776
608	if (cnt <= 0)	777	if (cnt <= 0)
609	{	778	{
610	if (cnt && !res) res = -1;	779	if (cnt && !res) res = -1;
611	break;	780	break;
…		…
613		782
614	offset += cnt;	783	offset += cnt;
615	res += cnt;	784	res += cnt;
616	count -= cnt;	785	count -= cnt;
617	}	786	}
		787
		788	fBUF;
618	}	789	}
619		790
620	return res;	791	return res;
621	}	792	}
622		793
623	/* read a full directory */	794	/* read a full directory */
624	static int
625	scandir_ (const char path, void *namesp)	795	static int scandir_ (const char path, void *namesp)
626	{	796	{
627	DIR *dirp = opendir (path);	797	DIR *dirp;
628	union	798	union
629	{	799	{
630	struct dirent d;	800	struct dirent d;
631	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	801	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
632	} u;	802	} *u;
633	struct dirent *entp;	803	struct dirent *entp;
634	char name, names;	804	char name, names;
635	int memlen = 4096;	805	int memlen = 4096;
636	int memofs = 0;	806	int memofs = 0;
637	int res = 0;	807	int res = 0;
638	int errorno;	808	int errorno;
639		809
		810	dirp = opendir (path);
640	if (!dirp)	811	if (!dirp)
641	return -1;	812	return -1;
642		813
		814	u = malloc (sizeof (*u));
643	names = malloc (memlen);	815	names = malloc (memlen);
644		816
		817	if (u && names)
645	for (;;)	818	for (;;)
646	{	819	{
		820	errno = 0;
647	errno = 0, readdir_r (dirp, &u.d, &entp);	821	readdir_r (dirp, &u->d, &entp);
648		822
649	if (!entp)	823	if (!entp)
650	break;	824	break;
651		825
652	name = entp->d_name;	826	name = entp->d_name;
653		827
654	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))	828	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
655	{	829	{
656	int len = strlen (name) + 1;	830	int len = strlen (name) + 1;
657		831
658	res++;	832	res++;
659		833
660	while (memofs + len > memlen)	834	while (memofs + len > memlen)
661	{	835	{
662	memlen *= 2;	836	memlen *= 2;
663	names = realloc (names, memlen);	837	names = realloc (names, memlen);
664	if (!names)	838	if (!names)
665	break;	839	break;
666	}	840	}
667		841
668	memcpy (names + memofs, name, len);	842	memcpy (names + memofs, name, len);
669	memofs += len;	843	memofs += len;
670	}	844	}
671	}	845	}
672		846
673	errorno = errno;	847	errorno = errno;
		848	free (u);
674	closedir (dirp);	849	closedir (dirp);
675		850
676	if (errorno)	851	if (errorno)
677	{	852	{
678	free (names);	853	free (names);
…		…
684	return res;	859	return res;
685	}	860	}
686		861
687	/*****************************************************************************/	862	/*****************************************************************************/
688		863
689	static void *
690	aio_proc (void *thr_arg)	864	static void aio_proc (void thr_arg)
691	{	865	{
692	aio_req req;	866	aio_req req;
693	int type;	867	int type;
694		868
695	do	869	do
696	{	870	{
697	pthread_mutex_lock (&reqlock);	871	pthread_mutex_lock (&reqlock);
698		872
699	for (;;)	873	for (;;)
700	{	874	{
701	req = reqs;	875	req = reqq_shift (&req_queue);
702
703	if (reqs)
704	{
705	reqs = reqs->next;
706	if (!reqs) reqe = 0;
707	}
708		876
709	if (req)	877	if (req)
710	break;	878	break;
711		879
712	pthread_cond_wait (&reqwait, &reqlock);	880	pthread_cond_wait (&reqwait, &reqlock);
713	}	881	}
714		882
715	pthread_mutex_unlock (&reqlock);	883	pthread_mutex_unlock (&reqlock);
716		884
717	errno = 0; /* strictly unnecessary */	885	errno = 0; /* strictly unnecessary */
		886	type = req->type; /* remember type for QUIT check */
718		887
719	if (!req->cancelled)	888	if (!(req->flags & FLAG_CANCELLED))
720	switch (req->type)	889	switch (type)
721	{	890	{
722	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	891	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
723	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	892	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
724		893
725	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	894	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
…		…
739		908
740	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	909	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
741	case REQ_FSYNC: req->result = fsync (req->fd); break;	910	case REQ_FSYNC: req->result = fsync (req->fd); break;
742	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	911	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
743		912
		913	case REQ_BUSY:
		914	{
		915	struct timeval tv;
		916
		917	tv.tv_sec = req->fd;
		918	tv.tv_usec = req->fd2;
		919
		920	req->result = select (0, 0, 0, 0, &tv);
		921	}
		922
		923	case REQ_GROUP:
		924	case REQ_NOP:
744	case REQ_QUIT:	925	case REQ_QUIT:
745	break;	926	break;
746		927
747	default:	928	default:
748	req->result = ENOSYS;	929	req->result = ENOSYS;
…		…
751		932
752	req->errorno = errno;	933	req->errorno = errno;
753		934
754	pthread_mutex_lock (&reslock);	935	pthread_mutex_lock (&reslock);
755		936
756	req->next = 0;	937	if (!reqq_push (&res_queue, req))
757
758	if (rese)
759	{
760	rese->next = req;
761	rese = req;
762	}
763	else
764	{
765	rese = ress = req;
766
767	/* write a dummy byte to the pipe so fh becomes ready */	938	/* write a dummy byte to the pipe so fh becomes ready */
768	write (respipe [1], &respipe, 1);	939	write (respipe [1], &respipe, 1);
769	}
770		940
771	pthread_mutex_unlock (&reslock);	941	pthread_mutex_unlock (&reslock);
772	}	942	}
773	while (type != REQ_QUIT);	943	while (type != REQ_QUIT);
774		944
…		…
805	{	975	{
806	aio_req prv;	976	aio_req prv;
807		977
808	started = 0;	978	started = 0;
809		979
810	while (reqs)	980	while (prv = reqq_shift (&req_queue))
811	{
812	prv = reqs;
813	reqs = prv->next;
814	req_free (prv);	981	req_free (prv);
815	}
816		982
817	reqs = reqe = 0;	983	while (prv = reqq_shift (&res_queue))
818
819	while (ress)
820	{
821	prv = ress;
822	ress = prv->next;
823	req_free (prv);	984	req_free (prv);
824	}	985
825
826	ress = rese = 0;
827
828	close (respipe [0]);	986	close (respipe [0]);
829	close (respipe [1]);	987	close (respipe [1]);
830	create_pipe ();	988	create_pipe ();
831		989
832	atfork_parent ();	990	atfork_parent ();
833	}	991	}
834		992
835	#define dREQ \	993	#define dREQ \
836	aio_req req; \	994	aio_req req; \
		995	int req_pri = next_pri; \
		996	next_pri = DEFAULT_PRI + PRI_BIAS; \
837	\	997	\
838	if (SvOK (callback) && !SvROK (callback)) \	998	if (SvOK (callback) && !SvROK (callback)) \
839	croak ("callback must be undef or of reference type"); \	999	croak ("callback must be undef or of reference type"); \
840	\	1000	\
841	Newz (0, req, 1, aio_cb); \	1001	Newz (0, req, 1, aio_cb); \
842	if (!req) \	1002	if (!req) \
843	croak ("out of memory during aio_req allocation"); \	1003	croak ("out of memory during aio_req allocation"); \
844	\	1004	\
845	req->callback = newSVsv (callback)	1005	req->callback = newSVsv (callback); \
		1006	req->pri = req_pri
846		1007
847	#define REQ_SEND \	1008	#define REQ_SEND \
848	req_send (req); \	1009	req_send (req); \
849	\	1010	\
850	if (GIMME_V != G_VOID) \	1011	if (GIMME_V != G_VOID) \
851	XPUSHs (req_sv (req));	1012	XPUSHs (req_sv (req, AIO_REQ_KLASS));
852		1013
853	MODULE = IO::AIO PACKAGE = IO::AIO	1014	MODULE = IO::AIO PACKAGE = IO::AIO
854		1015
855	PROTOTYPES: ENABLE	1016	PROTOTYPES: ENABLE
856		1017
…		…
1103	req->dataptr = SvPVbyte_nolen (req->data);	1264	req->dataptr = SvPVbyte_nolen (req->data);
1104		1265
1105	REQ_SEND;	1266	REQ_SEND;
1106	}	1267	}
1107		1268
1108	#if 0
1109
1110	# undocumented, because it does not cancel active requests
1111	void	1269	void
1112	cancel_most_requests ()	1270	aio_busy (delay,callback=&PL_sv_undef)
		1271	double delay
		1272	SV * callback
		1273	PPCODE:
		1274	{
		1275	dREQ;
		1276
		1277	req->type = REQ_BUSY;
		1278	req->fd = delay < 0. ? 0 : delay;
		1279	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1280
		1281	REQ_SEND;
		1282	}
		1283
		1284	void
		1285	aio_group (callback=&PL_sv_undef)
		1286	SV * callback
1113	PROTOTYPE:	1287	PROTOTYPE: ;$
1114	CODE:	1288	PPCODE:
1115	{	1289	{
1116	aio_req *req;	1290	dREQ;
1117		1291
1118	pthread_mutex_lock (&reqlock);	1292	req->type = REQ_GROUP;
1119	for (req = reqs; req; req = req->next)	1293	req_send (req);
1120	req->flags \|= 1;
1121	pthread_mutex_unlock (&reqlock);
1122		1294
1123	pthread_mutex_lock (&reslock);	1295	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1124	for (req = ress; req; req = req->next)
1125	req->flags \|= 1;
1126	pthread_mutex_unlock (&reslock);
1127	}	1296	}
1128		1297
1129	#endif	1298	void
		1299	aio_nop (callback=&PL_sv_undef)
		1300	SV * callback
		1301	PPCODE:
		1302	{
		1303	dREQ;
		1304
		1305	req->type = REQ_NOP;
		1306
		1307	REQ_SEND;
		1308	}
		1309
		1310	void
		1311	aioreq_pri (int pri = DEFAULT_PRI)
		1312	CODE:
		1313	if (pri < PRI_MIN) pri = PRI_MIN;
		1314	if (pri > PRI_MAX) pri = PRI_MAX;
		1315	next_pri = pri + PRI_BIAS;
		1316
		1317	void
		1318	aioreq_nice (int nice = 0)
		1319	CODE:
		1320	nice = next_pri - nice;
		1321	if (nice < PRI_MIN) nice = PRI_MIN;
		1322	if (nice > PRI_MAX) nice = PRI_MAX;
		1323	next_pri = nice + PRI_BIAS;
1130		1324
1131	void	1325	void
1132	flush ()	1326	flush ()
1133	PROTOTYPE:	1327	PROTOTYPE:
1134	CODE:	1328	CODE:
…		…
1177	CODE:	1371	CODE:
1178	RETVAL = nreqs;	1372	RETVAL = nreqs;
1179	OUTPUT:	1373	OUTPUT:
1180	RETVAL	1374	RETVAL
1181		1375
		1376	PROTOTYPES: DISABLE
		1377
1182	MODULE = IO::AIO PACKAGE = IO::AIO::CB	1378	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1183		1379
1184	void	1380	void
1185	cancel (aio_req_ornot req)	1381	cancel (aio_req_ornot req)
1186	PROTOTYPE:
1187	CODE:	1382	CODE:
1188	req->cancelled = 1;	1383	req_cancel (req);
1189		1384
		1385	void
		1386	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1387	CODE:
		1388	SvREFCNT_dec (req->callback);
		1389	req->callback = newSVsv (callback);
		1390
		1391	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1392
		1393	void
		1394	add (aio_req grp, ...)
		1395	PPCODE:
		1396	{
		1397	int i;
		1398	aio_req req;
		1399
		1400	if (grp->fd == 2)
		1401	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1402
		1403	for (i = 1; i < items; ++i )
		1404	{
		1405	if (GIMME_V != G_VOID)
		1406	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1407
		1408	req = SvAIO_REQ (ST (i));
		1409
		1410	if (req)
		1411	{
		1412	++grp->length;
		1413	req->grp = grp;
		1414
		1415	req->grp_prev = 0;
		1416	req->grp_next = grp->grp_first;
		1417
		1418	if (grp->grp_first)
		1419	grp->grp_first->grp_prev = req;
		1420
		1421	grp->grp_first = req;
		1422	}
		1423	}
		1424	}
		1425
		1426	void
		1427	result (aio_req grp, ...)
		1428	CODE:
		1429	{
		1430	int i;
		1431	AV *av = newAV ();
		1432
		1433	for (i = 1; i < items; ++i )
		1434	av_push (av, newSVsv (ST (i)));
		1435
		1436	SvREFCNT_dec (grp->data);
		1437	grp->data = (SV *)av;
		1438	}
		1439
		1440	void
		1441	limit (aio_req grp, int limit)
		1442	CODE:
		1443	grp->fd2 = limit;
		1444	aio_grp_feed (grp);
		1445
		1446	void
		1447	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1448	CODE:
		1449	{
		1450	SvREFCNT_dec (grp->fh2);
		1451	grp->fh2 = newSVsv (callback);
		1452
		1453	if (grp->fd2 <= 0)
		1454	grp->fd2 = 2;
		1455
		1456	aio_grp_feed (grp);
		1457	}
		1458

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Comparing IO-AIO/AIO.xs (file contents): Revision 1.43 by root, Sat Oct 21 23:06:04 2006 UTC vs. Revision 1.70 by root, Tue Oct 24 15:15:56 2006 UTC

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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.43 by root, Sat Oct 21 23:06:04 2006 UTC vs.
Revision 1.70 by root, Tue Oct 24 15:15:56 2006 UTC