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Comparing Linux-AIO/AIO.xs (file contents):
Revision 1.11 by root, Mon Oct 8 12:58:41 2001 UTC vs.
Revision 1.24 by root, Sat Jul 2 13:16:33 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
11#define STACKSIZE 1024 /* yeah */ 14typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */
15typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
16typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
12 17
13enum { REQ_QUIT, REQ_READ, REQ_WRITE, REQ_OPEN, REQ_CLOSE }; 18#define STACKSIZE (128 * sizeof (long)) /* yeah */
19
20enum {
21 REQ_QUIT,
22 REQ_OPEN, REQ_CLOSE, REQ_READ, REQ_WRITE,
23 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK
24};
14 25
15typedef struct { 26typedef struct {
16 char stack[STACKSIZE]; 27 char stack[STACKSIZE];
17} aio_thread; 28} aio_thread;
18 29
19typedef struct { 30typedef struct aio_cb {
31 struct aio_cb *next;
32
20 int type; 33 int type;
21 aio_thread *thread; 34 aio_thread *thread;
22 35
23/* read/write */
24 int fd; 36 int fd;
25 off_t offset; 37 off_t offset;
26 size_t length; 38 size_t length;
27 ssize_t result; 39 ssize_t result;
28 mode_t mode; /* open */ 40 mode_t mode; /* open */
29 int errorno; 41 int errorno;
30 SV *data, *callback; 42 SV *data, *callback;
31 void *dataptr; 43 void *dataptr;
32 STRLEN dataoffset; 44 STRLEN dataoffset;
45
46 Stat_t *statdata;
33} aio_cb; 47} aio_cb;
34 48
35typedef aio_cb *aio_req; 49typedef aio_cb *aio_req;
36 50
37static int started; 51static int started;
38static int nreqs; 52static int nreqs;
39static int reqpipe[2], respipe[2]; 53static int reqpipe[2], respipe[2];
40 54
55static aio_req qs, qe; /* queue start, queue end */
56
41static int aio_proc(void *arg); 57static int aio_proc(void *arg);
42 58
43static void 59static void
44start_thread(void) 60start_thread (void)
45{ 61{
46 aio_thread *thr; 62 aio_thread *thr;
47 63
48 New (0, thr, 1, aio_thread); 64 New (0, thr, 1, aio_thread);
49 65
50 if (clone (aio_proc, 66 if (clone (aio_proc,
51 &(thr->stack[STACKSIZE]), 67 &(thr->stack[STACKSIZE - sizeof (long)]),
52 CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND, 68 CLONE_VM|CLONE_FS|CLONE_FILES,
53 thr) >= 0) 69 thr) >= 0)
54 started++; 70 started++;
55 else 71 else
56 Safefree (thr); 72 Safefree (thr);
57} 73}
58 74
59static 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
60end_thread(void) 104end_thread (void)
61{ 105{
62 aio_req req; 106 aio_req req;
63 New (0, req, 1, aio_cb); 107 New (0, req, 1, aio_cb);
64 req->type = REQ_QUIT; 108 req->type = REQ_QUIT;
65 write (reqpipe[1], &req, sizeof (aio_req)); 109
110 send_req (req);
66} 111}
67 112
68static void 113static void
69send_req (aio_req req) 114read_write (pTHX_
70{
71 nreqs++;
72 write (reqpipe[1], &req, sizeof (aio_req));
73}
74
75static void
76read_write (pTHX_ int dowrite, int fd, off_t offset, size_t length, 115 int dowrite, int fd, off_t offset, size_t length,
77 SV *data, STRLEN dataoffset, SV*callback) 116 SV *data, STRLEN dataoffset, SV *callback)
78{ 117{
79 aio_req req; 118 aio_req req;
80 STRLEN svlen; 119 STRLEN svlen;
81 char *svptr = SvPV (data, svlen); 120 char *svptr = SvPV (data, svlen);
121
122 SvUPGRADE (data, SVt_PV);
123 SvPOK_on (data);
82 124
83 if (dataoffset < 0) 125 if (dataoffset < 0)
84 dataoffset += svlen; 126 dataoffset += svlen;
85 127
86 if (dataoffset < 0 || dataoffset > svlen) 128 if (dataoffset < 0 || dataoffset > svlen)
… …
99 } 141 }
100 142
101 if (length < 0) 143 if (length < 0)
102 croak ("length must not be negative"); 144 croak ("length must not be negative");
103 145
104 New (0, req, 1, aio_cb); 146 Newz (0, req, 1, aio_cb);
105 147
106 if (!req) 148 if (!req)
107 croak ("out of memory during aio_req allocation"); 149 croak ("out of memory during aio_req allocation");
108 150
109 req->type = dowrite ? REQ_WRITE : REQ_READ; 151 req->type = dowrite ? REQ_WRITE : REQ_READ;
… …
115 req->callback = SvREFCNT_inc (callback); 157 req->callback = SvREFCNT_inc (callback);
116 158
117 send_req (req); 159 send_req (req);
118} 160}
119 161
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
120static int 172static int
121poll_cb (pTHX) 173poll_cb (pTHX)
122{ 174{
123 dSP; 175 dSP;
124 int count = 0; 176 int count = 0;
125 aio_req req; 177 aio_req req;
126 178
127 while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 179 while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req))
128 { 180 {
181 nreqs--;
182
129 if (req->type == REQ_QUIT) 183 if (req->type == REQ_QUIT)
130 { 184 {
131 Safefree (req->thread); 185 Safefree (req->thread);
132 started--; 186 started--;
133 } 187 }
… …
138 192
139 if (req->type == REQ_READ) 193 if (req->type == REQ_READ)
140 SvCUR_set (req->data, req->dataoffset 194 SvCUR_set (req->data, req->dataoffset
141 + req->result > 0 ? req->result : 0); 195 + req->result > 0 ? req->result : 0);
142 196
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
143 PUSHMARK (SP); 209 PUSHMARK (SP);
144 XPUSHs (sv_2mortal (newSViv (req->result))); 210 XPUSHs (sv_2mortal (newSViv (req->result)));
145 PUTBACK; 211 PUTBACK;
146 call_sv (req->callback, G_VOID); 212 call_sv (req->callback, G_VOID);
147 SPAGAIN; 213 SPAGAIN;
148 214
149 SvREFCNT_dec (req->data); 215 if (req->callback)
150 SvREFCNT_dec (req->callback); 216 SvREFCNT_dec (req->callback);
151 217
152 errno = errorno; 218 errno = errorno;
153 nreqs--;
154 count++; 219 count++;
155 } 220 }
156 221
157 Safefree (req); 222 Safefree (req);
158 } 223 }
159 224
225 if (qs)
226 send_reqs ();
227
160 return count; 228 return count;
161} 229}
162 230
163static sigset_t fullsigset; 231static sigset_t fullsigset;
164 232
165#undef errno 233#undef errno
166#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; \
167 251
168static int 252static int
169aio_proc(void *thr_arg) 253aio_proc (void *thr_arg)
170{ 254{
171 aio_thread *thr = thr_arg; 255 aio_thread *thr = thr_arg;
172 aio_req req; 256 aio_req req;
173 int errno; 257 int errno;
174 258
259 /* this is very much kernel-specific :(:(:( */
175 /* we rely on gcc's ability to create closures. */ 260 /* we rely on gcc's ability to create closures. */
176 _syscall3(int,lseek,int,fd,off_t,offset,int,whence)
177 _syscall3(int,read,int,fd,char *,buf,off_t,count) 261 _syscall3(int,read,int,fd,char *,buf,size_t,count)
178 _syscall3(int,write,int,fd,char *,buf,off_t,count) 262 _syscall3(int,write,int,fd,char *,buf,size_t,count)
263
179 _syscall3(int,open,char *,pathname,int,flags,mode_t,mode) 264 _syscall3(int,open,char *,pathname,int,flags,mode_t,mode)
180 _syscall1(int,close,int,fd) 265 _syscall1(int,close,int,fd)
181 266
267#define arch64 (__ia64 || __alpha)
268
269#ifdef __NR_pread64 && !arch64
270 _syscall5(int,pread64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi)
271 _syscall5(int,pwrite64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi)
272#elif __NR_pread
273 _syscall4(int,pread,int,fd,char *,buf,size_t,count,offset_t,offset)
274 _syscall4(int,pwrite,int,fd,char *,buf,size_t,count,offset_t,offset)
275#else
276# error "neither pread nor pread64 defined"
277#endif
278
279
280#ifdef __NR_stat64 && !arch64
281 _syscall2(int,stat64, const char *, filename, struct stat64 *, buf)
282 _syscall2(int,lstat64, const char *, filename, struct stat64 *, buf)
283 _syscall2(int,fstat64, int, fd, struct stat64 *, buf)
284#elif __NR_stat
285 _syscall2(int,stat, const char *, filename, struct stat *, buf)
286 _syscall2(int,lstat, const char *, filename, struct stat *, buf)
287 _syscall2(int,fstat, int, fd, struct stat *, buf)
288#else
289# error "neither stat64 nor stat defined"
290#endif
291
292 _syscall1(int,unlink, char *, filename);
293
182 sigprocmask (SIG_SETMASK, &fullsigset, 0); 294 sigprocmask (SIG_SETMASK, &fullsigset, 0);
295 prctl (PR_SET_PDEATHSIG, SIGKILL);
183 296
184 /* then loop */ 297 /* then loop */
185 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 298 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))
186 { 299 {
187 req->thread = thr; 300 req->thread = thr;
188 errno = 0; 301 errno = 0; /* strictly unnecessary */
189 302
190 if (req->type == REQ_READ || req->type == REQ_WRITE) 303 switch (req->type)
191 { 304 {
192 if (lseek (req->fd, req->offset, SEEK_SET) == req->offset) 305#ifdef __NR_pread64
193 { 306 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break;
194 if (req->type == REQ_READ) 307 case REQ_WRITE: req->result = pwrite64(req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break;
308#else
195 req->result = read (req->fd, req->dataptr, req->length); 309 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
196 else
197 req->result = write(req->fd, req->dataptr, req->length); 310 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
198 } 311#endif
199 } 312#ifdef __NR_stat64
200 else if (req->type == REQ_OPEN) 313 struct stat64 statdata;
201 { 314 case REQ_STAT: req->result = stat64 (req->dataptr, &statdata); COPY_STATDATA; break;
315 case REQ_LSTAT: req->result = lstat64 (req->dataptr, &statdata); COPY_STATDATA; break;
316 case REQ_FSTAT: req->result = fstat64 (req->fd, &statdata); COPY_STATDATA; break;
317#else
318 struct stat statdata;
319 case REQ_STAT: req->result = stat (req->dataptr, &statdata); COPY_STATDATA; break;
320 case REQ_LSTAT: req->result = lstat (req->dataptr, &statdata); COPY_STATDATA; break;
321 case REQ_FSTAT: req->result = fstat (req->fd, &statdata); COPY_STATDATA; break;
322#endif
202 req->result = open (req->dataptr, req->fd, req->mode); 323 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
203 }
204 else if (req->type == REQ_CLOSE)
205 {
206 req->result = close (req->fd); 324 case REQ_CLOSE: req->result = close (req->fd); break;
207 } 325 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
208 else 326
209 { 327 case REQ_QUIT:
328 default:
210 write (respipe[1], (void *)&req, sizeof (req)); 329 write (respipe[1], (void *)&req, sizeof (req));
211 break; 330 return 0;
212 } 331 }
213 332
214 req->errorno = errno; 333 req->errorno = errno;
215 write (respipe[1], (void *)&req, sizeof (req)); 334 write (respipe[1], (void *)&req, sizeof (req));
216 } 335 }
… …
228 sigdelset (&fullsigset, SIGABRT); 347 sigdelset (&fullsigset, SIGABRT);
229 sigdelset (&fullsigset, SIGINT); 348 sigdelset (&fullsigset, SIGINT);
230 349
231 if (pipe (reqpipe) || pipe (respipe)) 350 if (pipe (reqpipe) || pipe (respipe))
232 croak ("unable to initialize request or result pipe"); 351 croak ("unable to initialize request or result pipe");
352
353 if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK))
354 croak ("cannot set result pipe to nonblocking mode");
233 355
234 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) 356 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
235 croak ("cannot set result pipe to nonblocking mode"); 357 croak ("cannot set result pipe to nonblocking mode");
236} 358}
237 359
… …
253 { 375 {
254 end_thread (); 376 end_thread ();
255 cur--; 377 cur--;
256 } 378 }
257 379
258 poll_cb ();
259 while (started > nthreads) 380 while (started > nthreads)
260 { 381 {
261 sched_yield (); 382 poll_wait ();
262 poll_cb (); 383 poll_cb (aTHX);
263 } 384 }
264 385
265void 386void
266aio_read(fh,offset,length,data,dataoffset,callback)
267 PerlIO * fh
268 UV offset
269 STRLEN length
270 SV * data
271 STRLEN dataoffset
272 SV * callback
273 PROTOTYPE: $$$$$$
274 ALIAS:
275 aio_write = 1
276 CODE:
277 SvUPGRADE (data, SVt_PV);
278 SvPOK_on (data);
279 read_write (aTHX_ ix, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
280
281void
282aio_open(pathname,flags,mode,callback) 387aio_open(pathname,flags,mode,callback)
283 char * pathname 388 SV * pathname
284 int flags 389 int flags
285 int mode 390 int mode
286 SV * callback 391 SV * callback
287 PROTOTYPE: $$$$ 392 PROTOTYPE: $$$$
288 CODE: 393 CODE:
289 aio_req req; 394 aio_req req;
290 395
291 New (0, req, 1, aio_cb); 396 Newz (0, req, 1, aio_cb);
292 397
293 if (!req) 398 if (!req)
294 croak ("out of memory during aio_req allocation"); 399 croak ("out of memory during aio_req allocation");
295 400
296 req->type = REQ_OPEN; 401 req->type = REQ_OPEN;
297 req->dataptr = pathname; 402 req->data = newSVsv (pathname);
403 req->dataptr = SvPV_nolen (req->data);
298 req->fd = flags; 404 req->fd = flags;
299 req->mode = mode; 405 req->mode = mode;
300 req->callback = SvREFCNT_inc (callback); 406 req->callback = SvREFCNT_inc (callback);
301 407
302 send_req (req); 408 send_req (req);
303 409
304void 410void
305aio_close(fh,callback) 411aio_close(fh,callback)
306 PerlIO * fh 412 InputStream fh
307 SV * callback 413 SV * callback
308 PROTOTYPE: $ 414 PROTOTYPE: $$
309 CODE: 415 CODE:
310 aio_req req; 416 aio_req req;
311 417
312 New (0, req, 1, aio_cb); 418 Newz (0, req, 1, aio_cb);
313 419
314 if (!req) 420 if (!req)
315 croak ("out of memory during aio_req allocation"); 421 croak ("out of memory during aio_req allocation");
316 422
317 req->type = REQ_CLOSE; 423 req->type = REQ_CLOSE;
318 req->fd = PerlIO_fileno (fh); 424 req->fd = PerlIO_fileno (fh);
319 req->callback = SvREFCNT_inc (callback); 425 req->callback = SvREFCNT_inc (callback);
320 426
321 send_req (req); 427 send_req (req);
322 428
429void
430aio_read(fh,offset,length,data,dataoffset,callback)
431 InputStream fh
432 UV offset
433 IV length
434 SV * data
435 IV dataoffset
436 SV * callback
437 PROTOTYPE: $$$$$$
438 CODE:
439 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
440
441void
442aio_write(fh,offset,length,data,dataoffset,callback)
443 OutputStream fh
444 UV offset
445 IV length
446 SV * data
447 IV dataoffset
448 SV * callback
449 PROTOTYPE: $$$$$$
450 CODE:
451 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
452
453void
454aio_stat(fh_or_path,callback)
455 SV * fh_or_path
456 SV * callback
457 PROTOTYPE: $$
458 ALIAS:
459 aio_lstat = 1
460 CODE:
461 aio_req req;
462
463 Newz (0, req, 1, aio_cb);
464
465 if (!req)
466 croak ("out of memory during aio_req allocation");
467
468 New (0, req->statdata, 1, Stat_t);
469
470 if (!req->statdata)
471 croak ("out of memory during aio_req->statdata allocation");
472
473 if (SvPOK (fh_or_path))
474 {
475 req->type = ix ? REQ_LSTAT : REQ_STAT;
476 req->data = newSVsv (fh_or_path);
477 req->dataptr = SvPV_nolen (req->data);
478 }
479 else
480 {
481 req->type = REQ_FSTAT;
482 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
483 }
484
485 req->callback = SvREFCNT_inc (callback);
486
487 send_req (req);
488
489void
490aio_unlink(pathname,callback)
491 SV * pathname
492 SV * callback
493 PROTOTYPE: $$
494 CODE:
495 aio_req req;
496
497 Newz (0, req, 1, aio_cb);
498
499 if (!req)
500 croak ("out of memory during aio_req allocation");
501
502 req->type = REQ_UNLINK;
503 req->data = newSVsv (pathname);
504 req->dataptr = SvPV_nolen (req->data);
505 req->callback = SvREFCNT_inc (callback);
506
507 send_req (req);
508
323int 509int
324poll_fileno() 510poll_fileno()
325 PROTOTYPE: 511 PROTOTYPE:
326 CODE: 512 CODE:
327 RETVAL = respipe[0]; 513 RETVAL = respipe[0];
… …
334 CODE: 520 CODE:
335 RETVAL = poll_cb (aTHX); 521 RETVAL = poll_cb (aTHX);
336 OUTPUT: 522 OUTPUT:
337 RETVAL 523 RETVAL
338 524
525void
526poll_wait()
527 PROTOTYPE:
528 CODE:
529 poll_wait ();
530
339int 531int
340nreqs() 532nreqs()
341 PROTOTYPE: 533 PROTOTYPE:
342 CODE: 534 CODE:
343 RETVAL = nreqs; 535 RETVAL = nreqs;

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