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

Comparing Linux-AIO/AIO.xs (file contents):
Revision 1.12 by root, Tue Dec 25 02:33:48 2001 UTC vs.
Revision 1.26 by root, Thu Jul 7 23:17:23 2005 UTC

…		…
		1	#define PERL_NO_GET_CONTEXT
		2
1	#include "EXTERN.h"	3	#include "EXTERN.h"
2	#include "perl.h"	4	#include "perl.h"
3	#include "XSUB.h"	5	#include "XSUB.h"
4		6
5	#include <sys/types.h>	7	#include <sys/types.h>
		8	#include <sys/stat.h>
6	#include <unistd.h>	9	#include <unistd.h>
7	#include <fcntl.h>	10	#include <fcntl.h>
8	#include <signal.h>	11	#include <signal.h>
9	#include <sched.h>	12	#include <sched.h>
		13	#include <endian.h>
10		14
		15	typedef void InputStream; / hack, but 5.6.1 is simply toooo old ;) */
		16	typedef void OutputStream; / hack, but 5.6.1 is simply toooo old ;) */
11	typedef void InOutStream; / hack, but 5.6.1 is simply toooo old ;) */	17	typedef void InOutStream; / hack, but 5.6.1 is simply toooo old ;) */
12		18
13	#define STACKSIZE 1024 /* yeah */	19	// 128 seems to be enough most everywhere. alpha needs 256.
		20	#define STACKSIZE (256 * sizeof (long))
14		21
15	enum { REQ_QUIT, REQ_READ, REQ_WRITE, REQ_OPEN, REQ_CLOSE };	22	enum {
		23	REQ_QUIT,
		24	REQ_OPEN, REQ_CLOSE, REQ_READ, REQ_WRITE,
		25	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK
		26	};
16		27
17	typedef struct {	28	typedef struct {
18	char stack[STACKSIZE];	29	char stack[STACKSIZE];
19	} aio_thread;	30	} aio_thread;
20		31
21	typedef struct {	32	typedef struct aio_cb {
		33	struct aio_cb *next;
		34
22	int type;	35	int type;
23	aio_thread *thread;	36	aio_thread *thread;
24		37
25	/* read/write */
26	int fd;	38	int fd;
27	off_t offset;	39	off_t offset;
28	size_t length;	40	size_t length;
29	ssize_t result;	41	ssize_t result;
30	mode_t mode; /* open */	42	mode_t mode; /* open */
31	int errorno;	43	int errorno;
32	SV data, callback;	44	SV data, callback;
33	void *dataptr;	45	void *dataptr;
34	STRLEN dataoffset;	46	STRLEN dataoffset;
		47
		48	Stat_t *statdata;
35	} aio_cb;	49	} aio_cb;
36		50
37	typedef aio_cb *aio_req;	51	typedef aio_cb *aio_req;
38		52
39	static int started;	53	static int started;
40	static int nreqs;	54	static int nreqs;
41	static int reqpipe[2], respipe[2];	55	static int reqpipe[2], respipe[2];
42		56
		57	static aio_req qs, qe; /* queue start, queue end */
		58
43	static int aio_proc(void *arg);	59	static int aio_proc(void *arg);
44		60
45	static void	61	static void
46	start_thread(void)	62	start_thread (void)
47	{	63	{
48	aio_thread *thr;	64	aio_thread *thr;
49		65
50	New (0, thr, 1, aio_thread);	66	New (0, thr, 1, aio_thread);
51		67
52	if (clone (aio_proc,	68	if (clone (aio_proc,
53	&(thr->stack[STACKSIZE]),	69	&(thr->stack[STACKSIZE - sizeof (long)]),
54	CLONE_VM\|CLONE_FS\|CLONE_FILES\|CLONE_SIGHAND,	70	CLONE_VM\|CLONE_FS\|CLONE_FILES,
55	thr) >= 0)	71	thr) >= 0)
56	started++;	72	started++;
57	else	73	else
58	Safefree (thr);	74	Safefree (thr);
59	}	75	}
60		76
61	static void	77	static void
		78	send_reqs (void)
		79	{
		80	/* this write is atomic */
		81	while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)
		82	{
		83	qs = qs->next;
		84	if (!qs) qe = 0;
		85	}
		86	}
		87
		88	static void
		89	send_req (aio_req req)
		90	{
		91	nreqs++;
		92	req->next = 0;
		93
		94	if (qe)
		95	{
		96	qe->next = req;
		97	qe = req;
		98	}
		99	else
		100	qe = qs = req;
		101
		102	send_reqs ();
		103	}
		104
		105	static void
62	end_thread(void)	106	end_thread (void)
63	{	107	{
64	aio_req req;	108	aio_req req;
65	New (0, req, 1, aio_cb);	109	New (0, req, 1, aio_cb);
66	req->type = REQ_QUIT;	110	req->type = REQ_QUIT;
67	write (reqpipe[1], &req, sizeof (aio_req));	111
		112	send_req (req);
68	}	113	}
69		114
70	static void	115	static void
71	send_req (aio_req req)	116	read_write (pTHX_
72	{
73	nreqs++;
74	write (reqpipe[1], &req, sizeof (aio_req));
75	}
76
77	static void
78	read_write (pTHX_ int dowrite, int fd, off_t offset, size_t length,	117	int dowrite, int fd, off_t offset, size_t length,
79	SV data, STRLEN dataoffset, SVcallback)	118	SV data, STRLEN dataoffset, SV callback)
80	{	119	{
81	aio_req req;	120	aio_req req;
82	STRLEN svlen;	121	STRLEN svlen;
83	char *svptr = SvPV (data, svlen);	122	char *svptr = SvPV (data, svlen);
		123
		124	SvUPGRADE (data, SVt_PV);
		125	SvPOK_on (data);
84		126
85	if (dataoffset < 0)	127	if (dataoffset < 0)
86	dataoffset += svlen;	128	dataoffset += svlen;
87		129
88	if (dataoffset < 0 \|\| dataoffset > svlen)	130	if (dataoffset < 0 \|\| dataoffset > svlen)
101	}	143	}
102		144
103	if (length < 0)	145	if (length < 0)
104	croak ("length must not be negative");	146	croak ("length must not be negative");
105		147
106	New (0, req, 1, aio_cb);	148	Newz (0, req, 1, aio_cb);
107		149
108	if (!req)	150	if (!req)
109	croak ("out of memory during aio_req allocation");	151	croak ("out of memory during aio_req allocation");
110		152
111	req->type = dowrite ? REQ_WRITE : REQ_READ;	153	req->type = dowrite ? REQ_WRITE : REQ_READ;
…		…
117	req->callback = SvREFCNT_inc (callback);	159	req->callback = SvREFCNT_inc (callback);
118		160
119	send_req (req);	161	send_req (req);
120	}	162	}
121		163
		164	static void
		165	poll_wait ()
		166	{
		167	fd_set rfd;
		168	FD_ZERO(&rfd);
		169	FD_SET(respipe[0], &rfd);
		170
		171	select (respipe[0] + 1, &rfd, 0, 0, 0);
		172	}
		173
122	static int	174	static int
123	poll_cb (pTHX)	175	poll_cb (pTHX)
124	{	176	{
125	dSP;	177	dSP;
126	int count = 0;	178	int count = 0;
127	aio_req req;	179	aio_req req;
128		180
129	while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req))	181	while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req))
130	{	182	{
		183	nreqs--;
		184
131	if (req->type == REQ_QUIT)	185	if (req->type == REQ_QUIT)
132	{	186	{
133	Safefree (req->thread);	187	Safefree (req->thread);
134	started--;	188	started--;
135	}	189	}
…		…
140		194
141	if (req->type == REQ_READ)	195	if (req->type == REQ_READ)
142	SvCUR_set (req->data, req->dataoffset	196	SvCUR_set (req->data, req->dataoffset
143	+ req->result > 0 ? req->result : 0);	197	+ req->result > 0 ? req->result : 0);
144		198
		199	if (req->data)
		200	SvREFCNT_dec (req->data);
		201
		202	if (req->type == REQ_STAT \|\| req->type == REQ_LSTAT \|\| req->type == REQ_FSTAT)
		203	{
		204	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		205	PL_laststatval = req->result;
		206	PL_statcache = *(req->statdata);
		207
		208	Safefree (req->statdata);
		209	}
		210
145	PUSHMARK (SP);	211	PUSHMARK (SP);
146	XPUSHs (sv_2mortal (newSViv (req->result)));	212	XPUSHs (sv_2mortal (newSViv (req->result)));
147	PUTBACK;	213	PUTBACK;
148	call_sv (req->callback, G_VOID);	214	call_sv (req->callback, G_VOID);
149	SPAGAIN;	215	SPAGAIN;
150		216
151	SvREFCNT_dec (req->data);	217	if (req->callback)
152	SvREFCNT_dec (req->callback);	218	SvREFCNT_dec (req->callback);
153		219
154	errno = errorno;	220	errno = errorno;
155	nreqs--;
156	count++;	221	count++;
157	}	222	}
158		223
159	Safefree (req);	224	Safefree (req);
160	}	225	}
161		226
		227	if (qs)
		228	send_reqs ();
		229
162	return count;	230	return count;
163	}	231	}
164		232
165	static sigset_t fullsigset;	233	static sigset_t fullsigset;
166		234
167	#undef errno	235	#undef errno
168	#include <asm/unistd.h>	236	#include <asm/unistd.h>
		237	#include <sys/prctl.h>
		238
		239	#if BYTE_ORDER == LITTLE_ENDIAN
		240	# define LONG_LONG_PAIR(HI, LO) LO, HI
		241	#elif BYTE_ORDER == BIG_ENDIAN
		242	# define LONG_LONG_PAIR(HI, LO) HI, LO
		243	#endif
		244
		245	#if __alpha \|\| __ia64 \|\| __hppa \|\| __v850__
		246	# define stat kernelstat
		247	# define stat64 kernelstat64
		248	# include <asm/stat.h>
		249	# undef stat
		250	# undef stat64
		251	#else
		252	# define kernelstat stat
		253	# define kernelstat64 stat64
		254	#endif
		255
		256	#define COPY_STATDATA \
		257	req->statdata->st_dev = statdata.st_dev; \
		258	req->statdata->st_ino = statdata.st_ino; \
		259	req->statdata->st_mode = statdata.st_mode; \
		260	req->statdata->st_nlink = statdata.st_nlink; \
		261	req->statdata->st_uid = statdata.st_uid; \
		262	req->statdata->st_gid = statdata.st_gid; \
		263	req->statdata->st_rdev = statdata.st_rdev; \
		264	req->statdata->st_size = statdata.st_size; \
		265	req->statdata->st_atime = statdata.st_atime; \
		266	req->statdata->st_mtime = statdata.st_mtime; \
		267	req->statdata->st_ctime = statdata.st_ctime; \
		268	req->statdata->st_blksize = statdata.st_blksize; \
		269	req->statdata->st_blocks = statdata.st_blocks; \
169		270
170	static int	271	static int
171	aio_proc(void *thr_arg)	272	aio_proc (void *thr_arg)
172	{	273	{
173	aio_thread *thr = thr_arg;	274	aio_thread *thr = thr_arg;
174	aio_req req;	275	aio_req req;
175	int errno;	276	int errno;
176		277
		278	/* this is very much kernel-specific :(:(:( */
177	/* we rely on gcc's ability to create closures. */	279	/* we rely on gcc's ability to create closures. */
178	_syscall3(int,lseek,int,fd,off_t,offset,int,whence)
179	_syscall3(int,read,int,fd,char *,buf,off_t,count)	280	_syscall3(int,read,int,fd,char *,buf,size_t,count)
180	_syscall3(int,write,int,fd,char *,buf,off_t,count)	281	_syscall3(int,write,int,fd,char *,buf,size_t,count)
		282
181	_syscall3(int,open,char *,pathname,int,flags,mode_t,mode)	283	_syscall3(int,open,char *,pathname,int,flags,mode_t,mode)
182	_syscall1(int,close,int,fd)	284	_syscall1(int,close,int,fd)
183		285
		286	#if __NR_pread64
		287	_syscall5(int,pread64,int,fd,char *,buf,size_t,count,unsigned int,offset_lh,unsigned int,offset_hl)
		288	_syscall5(int,pwrite64,int,fd,char *,buf,size_t,count,unsigned int,offset_lh,unsigned int,offset_hl)
		289	#elif __NR_pread
		290	_syscall4(int,pread,int,fd,char *,buf,size_t,count,offset_t,offset)
		291	_syscall4(int,pwrite,int,fd,char *,buf,size_t,count,offset_t,offset)
		292	#else
		293	# error "neither pread nor pread64 defined"
		294	#endif
		295
		296
		297	#if __NR_stat64
		298	_syscall2(int,stat64, const char , filename, struct kernelstat64 , buf)
		299	_syscall2(int,lstat64, const char , filename, struct kernelstat64 , buf)
		300	_syscall2(int,fstat64, int, fd, struct kernelstat64 *, buf)
		301	#elif __NR_stat
		302	_syscall2(int,stat, const char , filename, struct kernelstat , buf)
		303	_syscall2(int,lstat, const char , filename, struct kernelstat , buf)
		304	_syscall2(int,fstat, int, fd, struct kernelstat *, buf)
		305	#else
		306	# error "neither stat64 nor stat defined"
		307	#endif
		308
		309	_syscall1(int,unlink, char *, filename);
		310
184	sigprocmask (SIG_SETMASK, &fullsigset, 0);	311	sigprocmask (SIG_SETMASK, &fullsigset, 0);
		312	prctl (PR_SET_PDEATHSIG, SIGKILL);
185		313
186	/* then loop */	314	/* then loop */
187	while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))	315	while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))
188	{	316	{
189	req->thread = thr;	317	req->thread = thr;
190	errno = 0;	318	errno = 0; /* strictly unnecessary */
191		319
192	if (req->type == REQ_READ \|\| req->type == REQ_WRITE)	320	switch (req->type)
193	{	321	{
194	if (lseek (req->fd, req->offset, SEEK_SET) == req->offset)	322	#if __NR_pread64
195	{
196	if (req->type == REQ_READ)
197	req->result = read (req->fd, req->dataptr, req->length);	323	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length,
198	else	324	LONG_LONG_PAIR (req->offset >> 32, req->offset & 0xffffffff)); break;
199	req->result = write(req->fd, req->dataptr, req->length);	325	case REQ_WRITE: req->result = pwrite64(req->fd, req->dataptr, req->length,
200	}	326	LONG_LONG_PAIR (req->offset >> 32, req->offset & 0xffffffff)); break;
201	}	327	#else
202	else if (req->type == REQ_OPEN)	328	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
203	{	329	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
		330	#endif
		331	#if __NR_stat64
		332	struct kernelstat64 statdata;
		333	case REQ_STAT: req->result = stat64 (req->dataptr, &statdata); COPY_STATDATA; break;
		334	case REQ_LSTAT: req->result = lstat64 (req->dataptr, &statdata); COPY_STATDATA; break;
		335	case REQ_FSTAT: req->result = fstat64 (req->fd, &statdata); COPY_STATDATA; break;
		336	#else
		337	struct kernelstat statdata;
		338	case REQ_STAT: req->result = stat (req->dataptr, &statdata); COPY_STATDATA; break;
		339	case REQ_LSTAT: req->result = lstat (req->dataptr, &statdata); COPY_STATDATA; break;
		340	case REQ_FSTAT: req->result = fstat (req->fd, &statdata); COPY_STATDATA; break;
		341	#endif
204	req->result = open (req->dataptr, req->fd, req->mode);	342	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
205	}
206	else if (req->type == REQ_CLOSE)
207	{
208	req->result = close (req->fd);	343	case REQ_CLOSE: req->result = close (req->fd); break;
209	}	344	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
210	else	345
211	{	346	case REQ_QUIT:
		347	default:
212	write (respipe[1], (void *)&req, sizeof (req));	348	write (respipe[1], (void *)&req, sizeof (req));
213	break;	349	return 0;
214	}	350	}
215		351
216	req->errorno = errno;	352	req->errorno = errno;
217	write (respipe[1], (void *)&req, sizeof (req));	353	write (respipe[1], (void *)&req, sizeof (req));
218	}	354	}
…		…
230	sigdelset (&fullsigset, SIGABRT);	366	sigdelset (&fullsigset, SIGABRT);
231	sigdelset (&fullsigset, SIGINT);	367	sigdelset (&fullsigset, SIGINT);
232		368
233	if (pipe (reqpipe) \|\| pipe (respipe))	369	if (pipe (reqpipe) \|\| pipe (respipe))
234	croak ("unable to initialize request or result pipe");	370	croak ("unable to initialize request or result pipe");
		371
		372	if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK))
		373	croak ("cannot set result pipe to nonblocking mode");
235		374
236	if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))	375	if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
237	croak ("cannot set result pipe to nonblocking mode");	376	croak ("cannot set result pipe to nonblocking mode");
238	}	377	}
239		378
…		…
255	{	394	{
256	end_thread ();	395	end_thread ();
257	cur--;	396	cur--;
258	}	397	}
259		398
260	poll_cb ();
261	while (started > nthreads)	399	while (started > nthreads)
262	{	400	{
263	sched_yield ();	401	poll_wait ();
264	fcntl (respipe[0], F_SETFL, 0);
265	poll_cb ();	402	poll_cb (aTHX);
266	fcntl (respipe[0], F_SETFL, O_NONBLOCK);
267	}	403	}
268		404
269	void	405	void
		406	aio_open(pathname,flags,mode,callback)
		407	SV * pathname
		408	int flags
		409	int mode
		410	SV * callback
		411	PROTOTYPE: $$$$
		412	CODE:
		413	aio_req req;
		414
		415	Newz (0, req, 1, aio_cb);
		416
		417	if (!req)
		418	croak ("out of memory during aio_req allocation");
		419
		420	req->type = REQ_OPEN;
		421	req->data = newSVsv (pathname);
		422	req->dataptr = SvPV_nolen (req->data);
		423	req->fd = flags;
		424	req->mode = mode;
		425	req->callback = SvREFCNT_inc (callback);
		426
		427	send_req (req);
		428
		429	void
		430	aio_close(fh,callback)
		431	InputStream fh
		432	SV * callback
		433	PROTOTYPE: $$
		434	CODE:
		435	aio_req req;
		436
		437	Newz (0, req, 1, aio_cb);
		438
		439	if (!req)
		440	croak ("out of memory during aio_req allocation");
		441
		442	req->type = REQ_CLOSE;
		443	req->fd = PerlIO_fileno (fh);
		444	req->callback = SvREFCNT_inc (callback);
		445
		446	send_req (req);
		447
		448	void
270	aio_read(fh,offset,length,data,dataoffset,callback)	449	aio_read(fh,offset,length,data,dataoffset,callback)
271	InOutStream fh	450	InputStream fh
272	UV offset	451	UV offset
273	IV length	452	IV length
274	SV * data	453	SV * data
275	IV dataoffset	454	IV dataoffset
276	SV * callback	455	SV * callback
277	PROTOTYPE: $$$$$$	456	PROTOTYPE: $$$$$$
278	ALIAS:	457	CODE:
279	aio_write = 1
280	CODE:
281	SvUPGRADE (data, SVt_PV);
282	SvPOK_on (data);
283	read_write (aTHX_ ix, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);	458	read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
284		459
285	void	460	void
286	aio_open(pathname,flags,mode,callback)	461	aio_write(fh,offset,length,data,dataoffset,callback)
287	char * pathname	462	OutputStream fh
288	int flags	463	UV offset
289	int mode	464	IV length
		465	SV * data
		466	IV dataoffset
290	SV * callback	467	SV * callback
291	PROTOTYPE: $$$$	468	PROTOTYPE: $$$$$$
		469	CODE:
		470	read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
		471
		472	void
		473	aio_stat(fh_or_path,callback)
		474	SV * fh_or_path
		475	SV * callback
		476	PROTOTYPE: $$
		477	ALIAS:
		478	aio_lstat = 1
292	CODE:	479	CODE:
293	aio_req req;	480	aio_req req;
294		481
295	New (0, req, 1, aio_cb);	482	Newz (0, req, 1, aio_cb);
296		483
297	if (!req)	484	if (!req)
298	croak ("out of memory during aio_req allocation");	485	croak ("out of memory during aio_req allocation");
299		486
		487	New (0, req->statdata, 1, Stat_t);
		488
		489	if (!req->statdata)
		490	croak ("out of memory during aio_req->statdata allocation");
		491
		492	if (SvPOK (fh_or_path))
		493	{
		494	req->type = ix ? REQ_LSTAT : REQ_STAT;
		495	req->data = newSVsv (fh_or_path);
		496	req->dataptr = SvPV_nolen (req->data);
		497	}
		498	else
		499	{
300	req->type = REQ_OPEN;	500	req->type = REQ_FSTAT;
301	req->dataptr = pathname;	501	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
302	req->fd = flags;	502	}
303	req->mode = mode;	503
304	req->callback = SvREFCNT_inc (callback);	504	req->callback = SvREFCNT_inc (callback);
305		505
306	send_req (req);	506	send_req (req);
307		507
308	void	508	void
309	aio_close(fh,callback)	509	aio_unlink(pathname,callback)
310	InOutStream fh	510	SV * pathname
311	SV * callback	511	SV * callback
312	PROTOTYPE: $	512	PROTOTYPE: $$
313	CODE:	513	CODE:
314	aio_req req;	514	aio_req req;
315		515
316	New (0, req, 1, aio_cb);	516	Newz (0, req, 1, aio_cb);
317		517
318	if (!req)	518	if (!req)
319	croak ("out of memory during aio_req allocation");	519	croak ("out of memory during aio_req allocation");
320		520
321	req->type = REQ_CLOSE;	521	req->type = REQ_UNLINK;
322	req->fd = PerlIO_fileno (fh);	522	req->data = newSVsv (pathname);
		523	req->dataptr = SvPV_nolen (req->data);
323	req->callback = SvREFCNT_inc (callback);	524	req->callback = SvREFCNT_inc (callback);
324		525
325	send_req (req);	526	send_req (req);
326		527
327	int	528	int
328	poll_fileno()	529	poll_fileno()
329	PROTOTYPE:	530	PROTOTYPE:
330	CODE:	531	CODE:
…		…
338	CODE:	539	CODE:
339	RETVAL = poll_cb (aTHX);	540	RETVAL = poll_cb (aTHX);
340	OUTPUT:	541	OUTPUT:
341	RETVAL	542	RETVAL
342		543
		544	void
		545	poll_wait()
		546	PROTOTYPE:
		547	CODE:
		548	poll_wait ();
		549
343	int	550	int
344	nreqs()	551	nreqs()
345	PROTOTYPE:	552	PROTOTYPE:
346	CODE:	553	CODE:
347	RETVAL = nreqs;	554	RETVAL = nreqs;

Diff Legend

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

Comparing Linux-AIO/AIO.xs (file contents): Revision 1.12 by root, Tue Dec 25 02:33:48 2001 UTC vs. Revision 1.26 by root, Thu Jul 7 23:17:23 2005 UTC

Diff Legend

Comparing Linux-AIO/AIO.xs (file contents):
Revision 1.12 by root, Tue Dec 25 02:33:48 2001 UTC vs.
Revision 1.26 by root, Thu Jul 7 23:17:23 2005 UTC