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

Comparing Linux-AIO/AIO.xs (file contents):
Revision 1.6 by root, Tue Aug 14 23:25:39 2001 UTC vs.
Revision 1.28 by root, Sat Jul 9 04:02:54 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>
		11	#include <signal.h>
8	#include <sched.h>	12	#include <sched.h>
		13	#include <endian.h>
9		14
10	#define STACKSIZE 2048 /* yeah */	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 ;) */
		17	typedef void InOutStream; / hack, but 5.6.1 is simply toooo old ;) */
11		18
12	#define REQ_QUIT 0	19	#if __i386 \|\| __amd64
13	#define REQ_READ 1	20	# define STACKSIZE ( 256 * sizeof (long))
14	#define REQ_WRITE 2	21	#elif __ia64
		22	# define STACKSIZE (8192 * sizeof (long))
		23	#else
		24	# define STACKSIZE ( 512 * sizeof (long))
		25	#endif
		26
		27	enum {
		28	REQ_QUIT,
		29	REQ_OPEN, REQ_CLOSE, REQ_READ, REQ_WRITE,
		30	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK
		31	};
15		32
16	typedef struct {	33	typedef struct {
17	char stack[STACKSIZE];	34	char stack[STACKSIZE];
18	} aio_thread;	35	} aio_thread;
19		36
20	typedef struct {	37	typedef struct aio_cb {
		38	struct aio_cb *next;
		39
21	int type;	40	int type;
22	aio_thread *thread;	41	aio_thread *thread;
23		42
24	/* read/write */
25	int fd;	43	int fd;
26	off_t offset;	44	off_t offset;
27	size_t length;	45	size_t length;
28	ssize_t result;	46	ssize_t result;
		47	mode_t mode; /* open */
29	int errorno;	48	int errorno;
30
31	SV data, callback;	49	SV data, callback;
32	void *dataptr;	50	void *dataptr;
33	STRLEN dataoffset;	51	STRLEN dataoffset;
		52
		53	Stat_t *statdata;
34	} aio_cb;	54	} aio_cb;
35		55
36	typedef aio_cb *aio_req;	56	typedef aio_cb *aio_req;
37		57
38	static int started;	58	static int started;
39	static int nreqs;	59	static int nreqs;
40	static int reqpipe[2], respipe[2];	60	static int reqpipe[2], respipe[2];
41		61
		62	static aio_req qs, qe; /* queue start, queue end */
		63
42	static int aio_proc(void *arg);	64	static int aio_proc(void *arg);
43		65
44	static void	66	static void
45	start_thread(void)	67	start_thread (void)
46	{	68	{
47	aio_thread *thr;	69	aio_thread *thr;
48		70
49	New (0, thr, 1, aio_thread);	71	New (0, thr, 1, aio_thread);
50		72
51	if (clone (aio_proc,	73	if (clone (aio_proc,
52	&(thr->stack[STACKSIZE]),	74	&(thr->stack[STACKSIZE - 16]),
53	CLONE_VM\|CLONE_FS\|CLONE_FILES\|CLONE_SIGHAND,	75	CLONE_VM\|CLONE_FS\|CLONE_FILES,
54	thr) >= 0)	76	thr) >= 0)
55	started++;	77	started++;
56	else	78	else
57	Safefree (thr);	79	Safefree (thr);
58	}	80	}
59		81
60	static void	82	static void
		83	send_reqs (void)
		84	{
		85	/* this write is atomic */
		86	while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)
		87	{
		88	qs = qs->next;
		89	if (!qs) qe = 0;
		90	}
		91	}
		92
		93	static void
		94	send_req (aio_req req)
		95	{
		96	nreqs++;
		97	req->next = 0;
		98
		99	if (qe)
		100	{
		101	qe->next = req;
		102	qe = req;
		103	}
		104	else
		105	qe = qs = req;
		106
		107	send_reqs ();
		108	}
		109
		110	static void
61	end_thread(void)	111	end_thread (void)
62	{	112	{
63	aio_req req;	113	aio_req req;
64	New (0, req, 1, aio_cb);	114	New (0, req, 1, aio_cb);
65	req->type = REQ_QUIT;	115	req->type = REQ_QUIT;
66	write (reqpipe[1], &req, sizeof (aio_req));	116
		117	send_req (req);
67	}	118	}
68		119
69	static void	120	static void
		121	read_write (pTHX_
70	read_write (pTHX_ int dowrite, int fd, off_t offset, size_t length,	122	int dowrite, int fd, off_t offset, size_t length,
71	SV data, STRLEN dataoffset, SVcallback)	123	SV data, STRLEN dataoffset, SV callback)
72	{	124	{
73	aio_req req;	125	aio_req req;
74	STRLEN svlen;	126	STRLEN svlen;
75	char *svptr = SvPV (data, svlen);	127	char *svptr = SvPV (data, svlen);
		128
		129	SvUPGRADE (data, SVt_PV);
		130	SvPOK_on (data);
76		131
77	if (dataoffset < 0)	132	if (dataoffset < 0)
78	dataoffset += svlen;	133	dataoffset += svlen;
79		134
80	if (dataoffset < 0 \|\| dataoffset > svlen)	135	if (dataoffset < 0 \|\| dataoffset > svlen)
93	}	148	}
94		149
95	if (length < 0)	150	if (length < 0)
96	croak ("length must not be negative");	151	croak ("length must not be negative");
97		152
98	New (0, req, 1, aio_cb);	153	Newz (0, req, 1, aio_cb);
99		154
100	if (!req)	155	if (!req)
101	croak ("out of memory during aio_req allocation");	156	croak ("out of memory during aio_req allocation");
102		157
103	req->type = dowrite ? REQ_WRITE : REQ_READ;	158	req->type = dowrite ? REQ_WRITE : REQ_READ;
…		…
106	req->length = length;	161	req->length = length;
107	req->data = SvREFCNT_inc (data);	162	req->data = SvREFCNT_inc (data);
108	req->dataptr = (char *)svptr + dataoffset;	163	req->dataptr = (char *)svptr + dataoffset;
109	req->callback = SvREFCNT_inc (callback);	164	req->callback = SvREFCNT_inc (callback);
110		165
111	nreqs++;	166	send_req (req);
112	write (reqpipe[1], &req, sizeof (aio_req));	167	}
		168
		169	static void
		170	poll_wait ()
		171	{
		172	fd_set rfd;
		173	FD_ZERO(&rfd);
		174	FD_SET(respipe[0], &rfd);
		175
		176	select (respipe[0] + 1, &rfd, 0, 0, 0);
113	}	177	}
114		178
115	static int	179	static int
116	poll_cb (pTHX)	180	poll_cb (pTHX)
117	{	181	{
…		…
119	int count = 0;	183	int count = 0;
120	aio_req req;	184	aio_req req;
121		185
122	while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req))	186	while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req))
123	{	187	{
		188	nreqs--;
		189
124	if (req->type == REQ_QUIT)	190	if (req->type == REQ_QUIT)
125	{	191	{
126	Safefree (req->thread);	192	Safefree (req->thread);
127	started--;	193	started--;
128	}	194	}
…		…
133		199
134	if (req->type == REQ_READ)	200	if (req->type == REQ_READ)
135	SvCUR_set (req->data, req->dataoffset	201	SvCUR_set (req->data, req->dataoffset
136	+ req->result > 0 ? req->result : 0);	202	+ req->result > 0 ? req->result : 0);
137		203
		204	if (req->data)
		205	SvREFCNT_dec (req->data);
		206
		207	if (req->type == REQ_STAT \|\| req->type == REQ_LSTAT \|\| req->type == REQ_FSTAT)
		208	{
		209	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		210	PL_laststatval = req->result;
		211	PL_statcache = *(req->statdata);
		212
		213	Safefree (req->statdata);
		214	}
		215
138	PUSHMARK (SP);	216	PUSHMARK (SP);
139	XPUSHs (sv_2mortal (newSViv (req->result)));	217	XPUSHs (sv_2mortal (newSViv (req->result)));
140	PUTBACK;	218	PUTBACK;
141	call_sv (req->callback, G_VOID);	219	call_sv (req->callback, G_VOID);
142	SPAGAIN;	220	SPAGAIN;
143		221
144	SvREFCNT_dec (req->data);	222	if (req->callback)
145	SvREFCNT_dec (req->callback);	223	SvREFCNT_dec (req->callback);
146		224
147	errno = errorno;	225	errno = errorno;
148	nreqs--;
149	count++;	226	count++;
150	}	227	}
151		228
152	Safefree (req);	229	Safefree (req);
153	}	230	}
154		231
		232	if (qs)
		233	send_reqs ();
		234
155	return count;	235	return count;
156	}	236	}
		237
		238	static sigset_t fullsigset;
157		239
158	#undef errno	240	#undef errno
159	#include <asm/unistd.h>	241	#include <asm/unistd.h>
		242	#include <linux/types.h>
		243	#include <sys/prctl.h>
		244
		245	#if BYTE_ORDER == LITTLE_ENDIAN
		246	# define LONG_LONG_PAIR(HI, LO) LO, HI
		247	#elif BYTE_ORDER == BIG_ENDIAN
		248	# define LONG_LONG_PAIR(HI, LO) HI, LO
		249	#endif
		250
		251	#if __alpha \|\| __ia64 \|\| __hppa \|\| __v850__
		252	# define stat kernelstat
		253	# define stat64 kernelstat64
		254	# include <asm/stat.h>
		255	# undef stat
		256	# undef stat64
		257	#else
		258	# define kernelstat stat
		259	# define kernelstat64 stat64
		260	#endif
		261
		262	#define COPY_STATDATA \
		263	req->statdata->st_dev = statdata.st_dev; \
		264	req->statdata->st_ino = statdata.st_ino; \
		265	req->statdata->st_mode = statdata.st_mode; \
		266	req->statdata->st_nlink = statdata.st_nlink; \
		267	req->statdata->st_uid = statdata.st_uid; \
		268	req->statdata->st_gid = statdata.st_gid; \
		269	req->statdata->st_rdev = statdata.st_rdev; \
		270	req->statdata->st_size = statdata.st_size; \
		271	req->statdata->st_atime = statdata.st_atime; \
		272	req->statdata->st_mtime = statdata.st_mtime; \
		273	req->statdata->st_ctime = statdata.st_ctime; \
		274	req->statdata->st_blksize = statdata.st_blksize; \
		275	req->statdata->st_blocks = statdata.st_blocks; \
160		276
161	static int	277	static int
162	aio_proc(void *thr_arg)	278	aio_proc (void *thr_arg)
163	{	279	{
164	aio_thread *thr = thr_arg;	280	aio_thread *thr = thr_arg;
165	int sig;	281	aio_req req;
166	int errno;	282	int errno;
167	aio_req req;
168		283
		284	/* this is very much kernel-specific :(:(:( */
169	/* we rely on gcc's ability to create closures. */	285	/* we rely on gcc's ability to create closures. */
170	_syscall3(int,lseek,int,fd,off_t,offset,int,whence);	286	_syscall3(__kernel_size_t,read,unsigned int,fd,char *,buf,__kernel_size_t,count)
171	_syscall3(int,read,int,fd,char *,buf,off_t,count);	287	_syscall3(__kernel_size_t,write,unsigned int,fd,char *,buf,__kernel_size_t,count)
172	_syscall3(int,write,int,fd,char *,buf,off_t,count);
173		288
174	/* first get rid of any signals */	289	_syscall3(int,open,char *,pathname,int,flags,int,mode)
175	for (sig = 1; sig < _NSIG; sig++)	290	_syscall1(int,close,unsigned int,fd)
176	signal (sig, SIG_DFL);
177		291
178	signal (SIGPIPE, SIG_IGN);	292	#ifndef __NR_pread64
179		293	# define __NR_pread64 __NR_pread
		294	# define __NR_pwrite64 __NR_write
		295	#endif
		296	_syscall5(__kernel_ssize_t,pread64,unsigned int,fd,char *,buf,__kernel_size_t,count,unsigned int,offset_lh,unsigned int,offset_hl)
		297	_syscall5(__kernel_ssize_t,pwrite64,unsigned int,fd,char *,buf,__kernel_size_t,count,unsigned int,offset_lh,unsigned int,offset_hl)
		298
		299	#if __NR_stat64
		300	_syscall2(int,stat64, const char , filename, struct kernelstat64 , buf)
		301	_syscall2(int,lstat64, const char , filename, struct kernelstat64 , buf)
		302	_syscall2(int,fstat64, int, fd, struct kernelstat64 *, buf)
		303	#elif __NR_stat
		304	_syscall2(int,stat, const char , filename, struct kernelstat , buf)
		305	_syscall2(int,lstat, const char , filename, struct kernelstat , buf)
		306	_syscall2(int,fstat, int, fd, struct kernelstat *, buf)
		307	#else
		308	# error "neither stat64 nor stat defined"
		309	#endif
		310
		311	_syscall1(int,unlink, char *, filename);
		312
		313	sigprocmask (SIG_SETMASK, &fullsigset, 0);
		314	prctl (PR_SET_PDEATHSIG, SIGKILL);
		315
180	/* then loop */	316	/* then loop */
181	while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))	317	while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))
182	{	318	{
183	req->thread = thr;	319	req->thread = thr;
		320	errno = 0; /* strictly unnecessary */
184		321
185	if (req->type == REQ_READ \|\| req->type == REQ_WRITE)	322	switch (req->type)
186	{	323	{
187	errno = 0;
188
189	if (lseek (req->fd, req->offset, SEEK_SET) == req->offset)
190	{
191	if (req->type == REQ_READ)
192	req->result = read (req->fd, req->dataptr, req->length);	324	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length,
193	else	325	LONG_LONG_PAIR (req->offset >> 32, req->offset & 0xffffffff)); break;
194	req->result = write(req->fd, req->dataptr, req->length);	326	case REQ_WRITE: req->result = pwrite64(req->fd, req->dataptr, req->length,
195	}	327	LONG_LONG_PAIR (req->offset >> 32, req->offset & 0xffffffff)); break;
		328	#if __NR_stat64
		329	struct kernelstat64 statdata;
		330	case REQ_STAT: req->result = stat64 (req->dataptr, &statdata); COPY_STATDATA; break;
		331	case REQ_LSTAT: req->result = lstat64 (req->dataptr, &statdata); COPY_STATDATA; break;
		332	case REQ_FSTAT: req->result = fstat64 (req->fd, &statdata); COPY_STATDATA; break;
		333	#else
		334	struct kernelstat statdata;
		335	case REQ_STAT: req->result = stat (req->dataptr, &statdata); COPY_STATDATA; break;
		336	case REQ_LSTAT: req->result = lstat (req->dataptr, &statdata); COPY_STATDATA; break;
		337	case REQ_FSTAT: req->result = fstat (req->fd, &statdata); COPY_STATDATA; break;
		338	#endif
		339	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
		340	case REQ_CLOSE: req->result = close (req->fd); break;
		341	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
196		342
197	req->errorno = errno;	343	case REQ_QUIT:
		344	default:
		345	write (respipe[1], (void *)&req, sizeof (req));
		346	return 0;
198	}	347	}
199	else
200	{
201	write (respipe[1], (void *)&req, sizeof (req));
202	break;
203	}
204		348
		349	req->errorno = errno;
205	write (respipe[1], (void *)&req, sizeof (req));	350	write (respipe[1], (void *)&req, sizeof (req));
206	}	351	}
207		352
208	return 0;	353	return 0;
209	}	354	}
210		355
211	MODULE = Linux::AIO PACKAGE = Linux::AIO	356	MODULE = Linux::AIO PACKAGE = Linux::AIO
212		357
213	BOOT:	358	BOOT:
214	{	359	{
		360	sigfillset (&fullsigset);
		361	sigdelset (&fullsigset, SIGTERM);
		362	sigdelset (&fullsigset, SIGQUIT);
		363	sigdelset (&fullsigset, SIGABRT);
		364	sigdelset (&fullsigset, SIGINT);
		365
215	if (pipe (reqpipe) \|\| pipe (respipe))	366	if (pipe (reqpipe) \|\| pipe (respipe))
216	croak ("unable to initialize request or result pipe");	367	croak ("unable to initialize request or result pipe");
		368
		369	if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK))
		370	croak ("cannot set result pipe to nonblocking mode");
217		371
218	if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))	372	if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
219	croak ("cannot set result pipe to nonblocking mode");	373	croak ("cannot set result pipe to nonblocking mode");
220	}	374	}
221		375
…		…
237	{	391	{
238	end_thread ();	392	end_thread ();
239	cur--;	393	cur--;
240	}	394	}
241		395
242	poll_cb ();
243	while (started > nthreads)	396	while (started > nthreads)
244	{	397	{
245	sched_yield ();	398	poll_wait ();
246	poll_cb ();	399	poll_cb (aTHX);
247	}	400	}
248		401
249	void	402	void
		403	aio_open(pathname,flags,mode,callback)
		404	SV * pathname
		405	int flags
		406	int mode
		407	SV * callback
		408	PROTOTYPE: $$$$
		409	CODE:
		410	aio_req req;
		411
		412	Newz (0, req, 1, aio_cb);
		413
		414	if (!req)
		415	croak ("out of memory during aio_req allocation");
		416
		417	req->type = REQ_OPEN;
		418	req->data = newSVsv (pathname);
		419	req->dataptr = SvPV_nolen (req->data);
		420	req->fd = flags;
		421	req->mode = mode;
		422	req->callback = SvREFCNT_inc (callback);
		423
		424	send_req (req);
		425
		426	void
		427	aio_close(fh,callback)
		428	InputStream fh
		429	SV * callback
		430	PROTOTYPE: $$
		431	CODE:
		432	aio_req req;
		433
		434	Newz (0, req, 1, aio_cb);
		435
		436	if (!req)
		437	croak ("out of memory during aio_req allocation");
		438
		439	req->type = REQ_CLOSE;
		440	req->fd = PerlIO_fileno (fh);
		441	req->callback = SvREFCNT_inc (callback);
		442
		443	send_req (req);
		444
		445	void
250	aio_read(fh,offset,length,data,dataoffset,callback)	446	aio_read(fh,offset,length,data,dataoffset,callback)
251	PerlIO * fh	447	InputStream fh
252	UV offset	448	UV offset
253	STRLEN length	449	IV length
254	SV * data	450	SV * data
255	STRLEN dataoffset	451	IV dataoffset
256	SV * callback	452	SV * callback
257	PROTOTYPE: $$$$$$	453	PROTOTYPE: $$$$$$
258	ALIAS:	454	CODE:
259	aio_write = 1
260	CODE:
261	SvUPGRADE (data, SVt_PV);
262	SvPOK_on (data);
263	read_write (aTHX_ ix, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);	455	read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
		456
		457	void
		458	aio_write(fh,offset,length,data,dataoffset,callback)
		459	OutputStream fh
		460	UV offset
		461	IV length
		462	SV * data
		463	IV dataoffset
		464	SV * callback
		465	PROTOTYPE: $$$$$$
		466	CODE:
		467	read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
		468
		469	void
		470	aio_stat(fh_or_path,callback)
		471	SV * fh_or_path
		472	SV * callback
		473	PROTOTYPE: $$
		474	ALIAS:
		475	aio_lstat = 1
		476	CODE:
		477	aio_req req;
		478
		479	Newz (0, req, 1, aio_cb);
		480
		481	if (!req)
		482	croak ("out of memory during aio_req allocation");
		483
		484	New (0, req->statdata, 1, Stat_t);
		485
		486	if (!req->statdata)
		487	croak ("out of memory during aio_req->statdata allocation");
		488
		489	if (SvPOK (fh_or_path))
		490	{
		491	req->type = ix ? REQ_LSTAT : REQ_STAT;
		492	req->data = newSVsv (fh_or_path);
		493	req->dataptr = SvPV_nolen (req->data);
		494	}
		495	else
		496	{
		497	req->type = REQ_FSTAT;
		498	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		499	}
		500
		501	req->callback = SvREFCNT_inc (callback);
		502
		503	send_req (req);
		504
		505	void
		506	aio_unlink(pathname,callback)
		507	SV * pathname
		508	SV * callback
		509	PROTOTYPE: $$
		510	CODE:
		511	aio_req req;
		512
		513	Newz (0, req, 1, aio_cb);
		514
		515	if (!req)
		516	croak ("out of memory during aio_req allocation");
		517
		518	req->type = REQ_UNLINK;
		519	req->data = newSVsv (pathname);
		520	req->dataptr = SvPV_nolen (req->data);
		521	req->callback = SvREFCNT_inc (callback);
		522
		523	send_req (req);
264		524
265	int	525	int
266	poll_fileno()	526	poll_fileno()
267	PROTOTYPE:	527	PROTOTYPE:
268	CODE:	528	CODE:
…		…
276	CODE:	536	CODE:
277	RETVAL = poll_cb (aTHX);	537	RETVAL = poll_cb (aTHX);
278	OUTPUT:	538	OUTPUT:
279	RETVAL	539	RETVAL
280		540
		541	void
		542	poll_wait()
		543	PROTOTYPE:
		544	CODE:
		545	poll_wait ();
		546
281	int	547	int
282	nreqs()	548	nreqs()
283	PROTOTYPE:	549	PROTOTYPE:
284	CODE:	550	CODE:
285	RETVAL = nreqs;	551	RETVAL = nreqs;

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Comparing Linux-AIO/AIO.xs (file contents): Revision 1.6 by root, Tue Aug 14 23:25:39 2001 UTC vs. Revision 1.28 by root, Sat Jul 9 04:02:54 2005 UTC

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Comparing Linux-AIO/AIO.xs (file contents):
Revision 1.6 by root, Tue Aug 14 23:25:39 2001 UTC vs.
Revision 1.28 by root, Sat Jul 9 04:02:54 2005 UTC