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Comparing Linux-AIO/AIO.xs (file contents):
Revision 1.12 by root, Tue Dec 25 02:33:48 2001 UTC vs.
Revision 1.23 by root, Wed Jun 29 15:28:14 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>
10 13
14typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */
15typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
11typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 16typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
12 17
13#define STACKSIZE 1024 /* yeah */ 18#define STACKSIZE (128 * sizeof (long)) /* yeah */
14 19
15enum { REQ_QUIT, REQ_READ, REQ_WRITE, REQ_OPEN, REQ_CLOSE }; 20enum {
21 REQ_QUIT,
22 REQ_OPEN, REQ_CLOSE, REQ_READ, REQ_WRITE,
23 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK
24};
16 25
17typedef struct { 26typedef struct {
18 char stack[STACKSIZE]; 27 char stack[STACKSIZE];
19} aio_thread; 28} aio_thread;
20 29
21typedef struct { 30typedef struct aio_cb {
31 struct aio_cb *next;
32
22 int type; 33 int type;
23 aio_thread *thread; 34 aio_thread *thread;
24 35
25/* read/write */
26 int fd; 36 int fd;
27 off_t offset; 37 off_t offset;
28 size_t length; 38 size_t length;
29 ssize_t result; 39 ssize_t result;
30 mode_t mode; /* open */ 40 mode_t mode; /* open */
31 int errorno; 41 int errorno;
32 SV *data, *callback; 42 SV *data, *callback;
33 void *dataptr; 43 void *dataptr;
34 STRLEN dataoffset; 44 STRLEN dataoffset;
45
46 Stat_t *statdata;
35} aio_cb; 47} aio_cb;
36 48
37typedef aio_cb *aio_req; 49typedef aio_cb *aio_req;
38 50
39static int started; 51static int started;
40static int nreqs; 52static int nreqs;
41static int reqpipe[2], respipe[2]; 53static int reqpipe[2], respipe[2];
42 54
55static aio_req qs, qe; /* queue start, queue end */
56
43static int aio_proc(void *arg); 57static int aio_proc(void *arg);
44 58
45static void 59static void
46start_thread(void) 60start_thread (void)
47{ 61{
48 aio_thread *thr; 62 aio_thread *thr;
49 63
50 New (0, thr, 1, aio_thread); 64 New (0, thr, 1, aio_thread);
51 65
52 if (clone (aio_proc, 66 if (clone (aio_proc,
53 &(thr->stack[STACKSIZE]), 67 &(thr->stack[STACKSIZE - sizeof (long)]),
54 CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND, 68 CLONE_VM|CLONE_FS|CLONE_FILES,
55 thr) >= 0) 69 thr) >= 0)
56 started++; 70 started++;
57 else 71 else
58 Safefree (thr); 72 Safefree (thr);
59} 73}
60 74
61static void 75static void
76send_reqs (void)
77{
78 /* this write is atomic */
79 while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)
80 {
81 qs = qs->next;
82 if (!qs) qe = 0;
83 }
84}
85
86static void
87send_req (aio_req req)
88{
89 nreqs++;
90 req->next = 0;
91
92 if (qe)
93 {
94 qe->next = req;
95 qe = req;
96 }
97 else
98 qe = qs = req;
99
100 send_reqs ();
101}
102
103static void
62end_thread(void) 104end_thread (void)
63{ 105{
64 aio_req req; 106 aio_req req;
65 New (0, req, 1, aio_cb); 107 New (0, req, 1, aio_cb);
66 req->type = REQ_QUIT; 108 req->type = REQ_QUIT;
67 write (reqpipe[1], &req, sizeof (aio_req)); 109
110 send_req (req);
68} 111}
69 112
70static void 113static void
71send_req (aio_req req) 114read_write (pTHX_
72{
73 nreqs++;
74 write (reqpipe[1], &req, sizeof (aio_req));
75}
76
77static void
78read_write (pTHX_ int dowrite, int fd, off_t offset, size_t length, 115 int dowrite, int fd, off_t offset, size_t length,
79 SV *data, STRLEN dataoffset, SV*callback) 116 SV *data, STRLEN dataoffset, SV *callback)
80{ 117{
81 aio_req req; 118 aio_req req;
82 STRLEN svlen; 119 STRLEN svlen;
83 char *svptr = SvPV (data, svlen); 120 char *svptr = SvPV (data, svlen);
121
122 SvUPGRADE (data, SVt_PV);
123 SvPOK_on (data);
84 124
85 if (dataoffset < 0) 125 if (dataoffset < 0)
86 dataoffset += svlen; 126 dataoffset += svlen;
87 127
88 if (dataoffset < 0 || dataoffset > svlen) 128 if (dataoffset < 0 || dataoffset > svlen)
… …
101 } 141 }
102 142
103 if (length < 0) 143 if (length < 0)
104 croak ("length must not be negative"); 144 croak ("length must not be negative");
105 145
106 New (0, req, 1, aio_cb); 146 Newz (0, req, 1, aio_cb);
107 147
108 if (!req) 148 if (!req)
109 croak ("out of memory during aio_req allocation"); 149 croak ("out of memory during aio_req allocation");
110 150
111 req->type = dowrite ? REQ_WRITE : REQ_READ; 151 req->type = dowrite ? REQ_WRITE : REQ_READ;
… …
117 req->callback = SvREFCNT_inc (callback); 157 req->callback = SvREFCNT_inc (callback);
118 158
119 send_req (req); 159 send_req (req);
120} 160}
121 161
162static void
163poll_wait ()
164{
165 fd_set rfd;
166 FD_ZERO(&rfd);
167 FD_SET(respipe[0], &rfd);
168
169 select (respipe[0] + 1, &rfd, 0, 0, 0);
170}
171
122static int 172static int
123poll_cb (pTHX) 173poll_cb (pTHX)
124{ 174{
125 dSP; 175 dSP;
126 int count = 0; 176 int count = 0;
127 aio_req req; 177 aio_req req;
128 178
129 while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 179 while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req))
130 { 180 {
181 nreqs--;
182
131 if (req->type == REQ_QUIT) 183 if (req->type == REQ_QUIT)
132 { 184 {
133 Safefree (req->thread); 185 Safefree (req->thread);
134 started--; 186 started--;
135 } 187 }
… …
140 192
141 if (req->type == REQ_READ) 193 if (req->type == REQ_READ)
142 SvCUR_set (req->data, req->dataoffset 194 SvCUR_set (req->data, req->dataoffset
143 + req->result > 0 ? req->result : 0); 195 + req->result > 0 ? req->result : 0);
144 196
197 if (req->data)
198 SvREFCNT_dec (req->data);
199
200 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
201 {
202 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
203 PL_laststatval = req->result;
204 PL_statcache = *(req->statdata);
205
206 Safefree (req->statdata);
207 }
208
145 PUSHMARK (SP); 209 PUSHMARK (SP);
146 XPUSHs (sv_2mortal (newSViv (req->result))); 210 XPUSHs (sv_2mortal (newSViv (req->result)));
147 PUTBACK; 211 PUTBACK;
148 call_sv (req->callback, G_VOID); 212 call_sv (req->callback, G_VOID);
149 SPAGAIN; 213 SPAGAIN;
150 214
151 SvREFCNT_dec (req->data); 215 if (req->callback)
152 SvREFCNT_dec (req->callback); 216 SvREFCNT_dec (req->callback);
153 217
154 errno = errorno; 218 errno = errorno;
155 nreqs--;
156 count++; 219 count++;
157 } 220 }
158 221
159 Safefree (req); 222 Safefree (req);
160 } 223 }
161 224
225 if (qs)
226 send_reqs ();
227
162 return count; 228 return count;
163} 229}
164 230
165static sigset_t fullsigset; 231static sigset_t fullsigset;
166 232
167#undef errno 233#undef errno
168#include <asm/unistd.h> 234#include <asm/unistd.h>
235#include <sys/prctl.h>
236
237#define COPY_STATDATA \
238 req->statdata->st_dev = statdata.st_dev; \
239 req->statdata->st_ino = statdata.st_ino; \
240 req->statdata->st_mode = statdata.st_mode; \
241 req->statdata->st_nlink = statdata.st_nlink; \
242 req->statdata->st_uid = statdata.st_uid; \
243 req->statdata->st_gid = statdata.st_gid; \
244 req->statdata->st_rdev = statdata.st_rdev; \
245 req->statdata->st_size = statdata.st_size; \
246 req->statdata->st_atime = statdata.st_atime; \
247 req->statdata->st_mtime = statdata.st_mtime; \
248 req->statdata->st_ctime = statdata.st_ctime; \
249 req->statdata->st_blksize = statdata.st_blksize; \
250 req->statdata->st_blocks = statdata.st_blocks; \
169 251
170static int 252static int
171aio_proc(void *thr_arg) 253aio_proc (void *thr_arg)
172{ 254{
173 aio_thread *thr = thr_arg; 255 aio_thread *thr = thr_arg;
174 aio_req req; 256 aio_req req;
175 int errno; 257 int errno;
176 258
259 /* this is very much kernel-specific :(:(:( */
177 /* we rely on gcc's ability to create closures. */ 260 /* 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) 261 _syscall3(int,read,int,fd,char *,buf,size_t,count)
180 _syscall3(int,write,int,fd,char *,buf,off_t,count) 262 _syscall3(int,write,int,fd,char *,buf,size_t,count)
263
181 _syscall3(int,open,char *,pathname,int,flags,mode_t,mode) 264 _syscall3(int,open,char *,pathname,int,flags,mode_t,mode)
182 _syscall1(int,close,int,fd) 265 _syscall1(int,close,int,fd)
183 266
267#ifdef __NR_pread64
268 _syscall5(int,pread64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi)
269 _syscall5(int,pwrite64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi)
270#elif __NR_pread
271 _syscall4(int,pread,int,fd,char *,buf,size_t,count,offset_t,offset)
272 _syscall4(int,pwrite,int,fd,char *,buf,size_t,count,offset_t,offset)
273#else
274# error "neither pread nor pread64 defined"
275#endif
276
277
278#ifdef __NR_stat64
279 _syscall2(int,stat64, const char *, filename, struct stat64 *, buf)
280 _syscall2(int,lstat64, const char *, filename, struct stat64 *, buf)
281 _syscall2(int,fstat64, int, fd, struct stat64 *, buf)
282#elif __NR_stat
283 _syscall2(int,stat, const char *, filename, struct stat *, buf)
284 _syscall2(int,lstat, const char *, filename, struct stat *, buf)
285 _syscall2(int,fstat, int, fd, struct stat *, buf)
286#else
287# error "neither stat64 nor stat defined"
288#endif
289
290 _syscall1(int,unlink, char *, filename);
291
184 sigprocmask (SIG_SETMASK, &fullsigset, 0); 292 sigprocmask (SIG_SETMASK, &fullsigset, 0);
293 prctl (PR_SET_PDEATHSIG, SIGKILL);
185 294
186 /* then loop */ 295 /* then loop */
187 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 296 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))
188 { 297 {
189 req->thread = thr; 298 req->thread = thr;
190 errno = 0; 299 errno = 0; /* strictly unnecessary */
191 300
192 if (req->type == REQ_READ || req->type == REQ_WRITE) 301 switch (req->type)
193 { 302 {
194 if (lseek (req->fd, req->offset, SEEK_SET) == req->offset) 303#ifdef __NR_pread64
195 { 304 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break;
196 if (req->type == REQ_READ) 305 case REQ_WRITE: req->result = pwrite64(req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break;
306#else
197 req->result = read (req->fd, req->dataptr, req->length); 307 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
198 else
199 req->result = write(req->fd, req->dataptr, req->length); 308 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
200 } 309#endif
201 } 310#ifdef __NR_stat64
202 else if (req->type == REQ_OPEN) 311 struct stat64 statdata;
203 { 312 case REQ_STAT: req->result = stat64 (req->dataptr, &statdata); COPY_STATDATA; break;
313 case REQ_LSTAT: req->result = lstat64 (req->dataptr, &statdata); COPY_STATDATA; break;
314 case REQ_FSTAT: req->result = fstat64 (req->fd, &statdata); COPY_STATDATA; break;
315#else
316 struct stat statdata;
317 case REQ_STAT: req->result = stat (req->dataptr, &statdata); COPY_STATDATA; break;
318 case REQ_LSTAT: req->result = lstat (req->dataptr, &statdata); COPY_STATDATA; break;
319 case REQ_FSTAT: req->result = fstat (req->fd, &statdata); COPY_STATDATA; break;
320#endif
204 req->result = open (req->dataptr, req->fd, req->mode); 321 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); 322 case REQ_CLOSE: req->result = close (req->fd); break;
209 } 323 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
210 else 324
211 { 325 case REQ_QUIT:
326 default:
212 write (respipe[1], (void *)&req, sizeof (req)); 327 write (respipe[1], (void *)&req, sizeof (req));
213 break; 328 return 0;
214 } 329 }
215 330
216 req->errorno = errno; 331 req->errorno = errno;
217 write (respipe[1], (void *)&req, sizeof (req)); 332 write (respipe[1], (void *)&req, sizeof (req));
218 } 333 }
… …
230 sigdelset (&fullsigset, SIGABRT); 345 sigdelset (&fullsigset, SIGABRT);
231 sigdelset (&fullsigset, SIGINT); 346 sigdelset (&fullsigset, SIGINT);
232 347
233 if (pipe (reqpipe) || pipe (respipe)) 348 if (pipe (reqpipe) || pipe (respipe))
234 croak ("unable to initialize request or result pipe"); 349 croak ("unable to initialize request or result pipe");
350
351 if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK))
352 croak ("cannot set result pipe to nonblocking mode");
235 353
236 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) 354 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
237 croak ("cannot set result pipe to nonblocking mode"); 355 croak ("cannot set result pipe to nonblocking mode");
238} 356}
239 357
… …
255 { 373 {
256 end_thread (); 374 end_thread ();
257 cur--; 375 cur--;
258 } 376 }
259 377
260 poll_cb ();
261 while (started > nthreads) 378 while (started > nthreads)
262 { 379 {
263 sched_yield (); 380 poll_wait ();
264 fcntl (respipe[0], F_SETFL, 0);
265 poll_cb (); 381 poll_cb (aTHX);
266 fcntl (respipe[0], F_SETFL, O_NONBLOCK);
267 } 382 }
268 383
269void 384void
385aio_open(pathname,flags,mode,callback)
386 SV * pathname
387 int flags
388 int mode
389 SV * callback
390 PROTOTYPE: $$$$
391 CODE:
392 aio_req req;
393
394 Newz (0, req, 1, aio_cb);
395
396 if (!req)
397 croak ("out of memory during aio_req allocation");
398
399 req->type = REQ_OPEN;
400 req->data = newSVsv (pathname);
401 req->dataptr = SvPV_nolen (req->data);
402 req->fd = flags;
403 req->mode = mode;
404 req->callback = SvREFCNT_inc (callback);
405
406 send_req (req);
407
408void
409aio_close(fh,callback)
410 InputStream fh
411 SV * callback
412 PROTOTYPE: $$
413 CODE:
414 aio_req req;
415
416 Newz (0, req, 1, aio_cb);
417
418 if (!req)
419 croak ("out of memory during aio_req allocation");
420
421 req->type = REQ_CLOSE;
422 req->fd = PerlIO_fileno (fh);
423 req->callback = SvREFCNT_inc (callback);
424
425 send_req (req);
426
427void
270aio_read(fh,offset,length,data,dataoffset,callback) 428aio_read(fh,offset,length,data,dataoffset,callback)
271 InOutStream fh 429 InputStream fh
272 UV offset 430 UV offset
273 IV length 431 IV length
274 SV * data 432 SV * data
275 IV dataoffset 433 IV dataoffset
276 SV * callback 434 SV * callback
277 PROTOTYPE: $$$$$$ 435 PROTOTYPE: $$$$$$
278 ALIAS: 436 CODE:
279 aio_write = 1
280 CODE:
281 SvUPGRADE (data, SVt_PV);
282 SvPOK_on (data);
283 read_write (aTHX_ ix, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); 437 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
284 438
285void 439void
286aio_open(pathname,flags,mode,callback) 440aio_write(fh,offset,length,data,dataoffset,callback)
287 char * pathname 441 OutputStream fh
288 int flags 442 UV offset
289 int mode 443 IV length
444 SV * data
445 IV dataoffset
290 SV * callback 446 SV * callback
291 PROTOTYPE: $$$$ 447 PROTOTYPE: $$$$$$
448 CODE:
449 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
450
451void
452aio_stat(fh_or_path,callback)
453 SV * fh_or_path
454 SV * callback
455 PROTOTYPE: $$
456 ALIAS:
457 aio_lstat = 1
292 CODE: 458 CODE:
293 aio_req req; 459 aio_req req;
294 460
295 New (0, req, 1, aio_cb); 461 Newz (0, req, 1, aio_cb);
296 462
297 if (!req) 463 if (!req)
298 croak ("out of memory during aio_req allocation"); 464 croak ("out of memory during aio_req allocation");
299 465
466 New (0, req->statdata, 1, Stat_t);
467
468 if (!req->statdata)
469 croak ("out of memory during aio_req->statdata allocation");
470
471 if (SvPOK (fh_or_path))
472 {
473 req->type = ix ? REQ_LSTAT : REQ_STAT;
474 req->data = newSVsv (fh_or_path);
475 req->dataptr = SvPV_nolen (req->data);
476 }
477 else
478 {
300 req->type = REQ_OPEN; 479 req->type = REQ_FSTAT;
301 req->dataptr = pathname; 480 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
302 req->fd = flags; 481 }
303 req->mode = mode; 482
304 req->callback = SvREFCNT_inc (callback); 483 req->callback = SvREFCNT_inc (callback);
305 484
306 send_req (req); 485 send_req (req);
307 486
308void 487void
309aio_close(fh,callback) 488aio_unlink(pathname,callback)
310 InOutStream fh 489 SV * pathname
311 SV * callback 490 SV * callback
312 PROTOTYPE: $ 491 PROTOTYPE: $$
313 CODE: 492 CODE:
314 aio_req req; 493 aio_req req;
315 494
316 New (0, req, 1, aio_cb); 495 Newz (0, req, 1, aio_cb);
317 496
318 if (!req) 497 if (!req)
319 croak ("out of memory during aio_req allocation"); 498 croak ("out of memory during aio_req allocation");
320 499
321 req->type = REQ_CLOSE; 500 req->type = REQ_UNLINK;
322 req->fd = PerlIO_fileno (fh); 501 req->data = newSVsv (pathname);
502 req->dataptr = SvPV_nolen (req->data);
323 req->callback = SvREFCNT_inc (callback); 503 req->callback = SvREFCNT_inc (callback);
324 504
325 send_req (req); 505 send_req (req);
326 506
327int 507int
328poll_fileno() 508poll_fileno()
329 PROTOTYPE: 509 PROTOTYPE:
330 CODE: 510 CODE:
… …
338 CODE: 518 CODE:
339 RETVAL = poll_cb (aTHX); 519 RETVAL = poll_cb (aTHX);
340 OUTPUT: 520 OUTPUT:
341 RETVAL 521 RETVAL
342 522
523void
524poll_wait()
525 PROTOTYPE:
526 CODE:
527 poll_wait ();
528
343int 529int
344nreqs() 530nreqs()
345 PROTOTYPE: 531 PROTOTYPE:
346 CODE: 532 CODE:
347 RETVAL = nreqs; 533 RETVAL = nreqs;

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