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Comparing Linux-AIO/AIO.xs (file contents):
Revision 1.13 by root, Mon Apr 1 20:30:08 2002 UTC vs.
Revision 1.19 by root, Fri May 7 00:57:29 2004 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>
… …
11 13
12typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 14typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */
13typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 15typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
14typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 16typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
15 17
18#ifndef __NR_pread64
19# define __NR_pread64 __NR_pread
20#endif
21#ifndef __NR_pwrite64
22# define __NR_pwrite64 __NR_pwrite
23#endif
24
16#define STACKSIZE 1024 /* yeah */ 25#define STACKSIZE 1024 /* yeah */
17 26
18enum { REQ_QUIT, REQ_OPEN, REQ_CLOSE, REQ_READ, REQ_WRITE, REQ_STAT, REQ_LSTAT, REQ_FSTAT}; 27enum { REQ_QUIT, REQ_OPEN, REQ_CLOSE, REQ_READ, REQ_WRITE, REQ_STAT, REQ_LSTAT, REQ_FSTAT};
19 28
20typedef struct { 29typedef struct {
21 char stack[STACKSIZE]; 30 char stack[STACKSIZE];
22} aio_thread; 31} aio_thread;
23 32
24typedef struct { 33typedef struct aio_cb {
34 struct aio_cb *next;
35
25 int type; 36 int type;
26 aio_thread *thread; 37 aio_thread *thread;
27
28 SV *savesv;
29 38
30 int fd; 39 int fd;
31 off_t offset; 40 off_t offset;
32 size_t length; 41 size_t length;
33 ssize_t result; 42 ssize_t result;
… …
44 53
45static int started; 54static int started;
46static int nreqs; 55static int nreqs;
47static int reqpipe[2], respipe[2]; 56static int reqpipe[2], respipe[2];
48 57
58static aio_req qs, qe; /* queue start, queue end */
59
49static int aio_proc(void *arg); 60static int aio_proc(void *arg);
50 61
51static void 62static void
52start_thread(void) 63start_thread (void)
53{ 64{
54 aio_thread *thr; 65 aio_thread *thr;
55 66
56 New (0, thr, 1, aio_thread); 67 New (0, thr, 1, aio_thread);
57 68
… …
63 else 74 else
64 Safefree (thr); 75 Safefree (thr);
65} 76}
66 77
67static void 78static void
79send_reqs (void)
80{
81 /* this write is atomic */
82 while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)
83 {
84 qs = qs->next;
85 if (!qs) qe = 0;
86 }
87}
88
89static void
90send_req (aio_req req)
91{
92 nreqs++;
93 req->next = 0;
94
95 if (qe)
96 qe->next = req;
97 else
98 qe = qs = req;
99
100 send_reqs ();
101}
102
103static void
68end_thread(void) 104end_thread (void)
69{ 105{
70 aio_req req; 106 aio_req req;
71 New (0, req, 1, aio_cb); 107 New (0, req, 1, aio_cb);
72 req->type = REQ_QUIT; 108 req->type = REQ_QUIT;
73 write (reqpipe[1], &req, sizeof (aio_req)); 109
110 send_req (req);
74} 111}
75 112
76static void 113static void
77send_req (aio_req req) 114read_write (pTHX_
78{
79 nreqs++;
80 write (reqpipe[1], &req, sizeof (aio_req));
81}
82
83static void
84read_write (pTHX_ int dowrite, int fd, off_t offset, size_t length, 115 int dowrite, int fd, off_t offset, size_t length,
85 SV *data, STRLEN dataoffset, SV*callback) 116 SV *data, STRLEN dataoffset, SV *callback)
86{ 117{
87 aio_req req; 118 aio_req req;
88 STRLEN svlen; 119 STRLEN svlen;
89 char *svptr = SvPV (data, svlen); 120 char *svptr = SvPV (data, svlen);
90 121
… …
110 } 141 }
111 142
112 if (length < 0) 143 if (length < 0)
113 croak ("length must not be negative"); 144 croak ("length must not be negative");
114 145
115 New (0, req, 1, aio_cb); 146 Newz (0, req, 1, aio_cb);
116 147
117 if (!req) 148 if (!req)
118 croak ("out of memory during aio_req allocation"); 149 croak ("out of memory during aio_req allocation");
119 150
120 req->type = dowrite ? REQ_WRITE : REQ_READ; 151 req->type = dowrite ? REQ_WRITE : REQ_READ;
… …
145 else 176 else
146 { 177 {
147 int errorno = errno; 178 int errorno = errno;
148 errno = req->errorno; 179 errno = req->errorno;
149 180
150 if (req->savesv)
151 SvREFCNT_dec (req->savesv);
152
153 if (req->type == REQ_READ) 181 if (req->type == REQ_READ)
154 SvCUR_set (req->data, req->dataoffset 182 SvCUR_set (req->data, req->dataoffset
155 + req->result > 0 ? req->result : 0); 183 + req->result > 0 ? req->result : 0);
184
185 if (req->data)
186 SvREFCNT_dec (req->data);
156 187
157 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) 188 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
158 { 189 {
159 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 190 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
160 PL_laststatval = req->result; 191 PL_laststatval = req->result;
… …
179 XPUSHs (sv_2mortal (newSViv (req->result))); 210 XPUSHs (sv_2mortal (newSViv (req->result)));
180 PUTBACK; 211 PUTBACK;
181 call_sv (req->callback, G_VOID); 212 call_sv (req->callback, G_VOID);
182 SPAGAIN; 213 SPAGAIN;
183 214
184 SvREFCNT_dec (req->data); 215 if (req->callback)
185 SvREFCNT_dec (req->callback); 216 SvREFCNT_dec (req->callback);
186 217
187 errno = errorno; 218 errno = errorno;
188 nreqs--; 219 nreqs--;
189 count++; 220 count++;
190 } 221 }
191 222
192 Safefree (req); 223 Safefree (req);
193 } 224 }
194 225
226 if (qs)
227 send_reqs ();
228
195 return count; 229 return count;
196} 230}
197 231
198static sigset_t fullsigset; 232static sigset_t fullsigset;
199 233
200#undef errno 234#undef errno
201#include <asm/unistd.h> 235#include <asm/unistd.h>
202 236
203static int 237static int
204aio_proc(void *thr_arg) 238aio_proc (void *thr_arg)
205{ 239{
206 aio_thread *thr = thr_arg; 240 aio_thread *thr = thr_arg;
207 aio_req req; 241 aio_req req;
208 int errno; 242 int errno;
209 243
244 /* this is very much x86 and kernel-specific :(:(:( */
210 /* we rely on gcc's ability to create closures. */ 245 /* we rely on gcc's ability to create closures. */
211 _syscall3(int,read,int,fd,char *,buf,size_t,count) 246 _syscall3(int,read,int,fd,char *,buf,size_t,count)
212 _syscall3(int,write,int,fd,char *,buf,size_t,count) 247 _syscall3(int,write,int,fd,char *,buf,size_t,count)
213 248
214 _syscall3(int,open,char *,pathname,int,flags,mode_t,mode) 249 _syscall3(int,open,char *,pathname,int,flags,mode_t,mode)
215 _syscall1(int,close,int,fd) 250 _syscall1(int,close,int,fd)
216 251
217 _syscall4(int,pread,int,fd,char *,buf,size_t,count,off_t,offset) 252 _syscall5(int,pread64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi)
218 _syscall4(int,pwrite,int,fd,char *,buf,size_t,count,off_t,offset) 253 _syscall5(int,pwrite64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi)
219 254
220 _syscall2(int,stat64, const char *, filename, struct stat64 *, buf) 255 _syscall2(int,stat64, const char *, filename, struct stat64 *, buf)
221 _syscall2(int,lstat64, const char *, filename, struct stat64 *, buf) 256 _syscall2(int,lstat64, const char *, filename, struct stat64 *, buf)
222 _syscall2(int,fstat64, int, fd, struct stat64 *, buf) 257 _syscall2(int,fstat64, int, fd, struct stat64 *, buf)
223 258
… …
225 260
226 /* then loop */ 261 /* then loop */
227 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 262 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))
228 { 263 {
229 req->thread = thr; 264 req->thread = thr;
230 errno = 0; 265 errno = 0; /* strictly unnecessary */
231 266
232 if (req->type == REQ_READ) 267 switch (req->type)
233 req->result = pread (req->fd, req->dataptr, req->length, req->offset);
234 else if (req->type == REQ_WRITE)
235 req->result = pwrite (req->fd, req->dataptr, req->length, req->offset);
236 else if (req->type == REQ_OPEN)
237 req->result = open (req->dataptr, req->fd, req->mode);
238 else if (req->type == REQ_CLOSE)
239 req->result = close (req->fd);
240 else if (req->type == REQ_STAT)
241 req->result = stat64 (req->dataptr, req->statdata);
242 else if (req->type == REQ_LSTAT)
243 req->result = lstat64 (req->dataptr, req->statdata);
244 else if (req->type == REQ_FSTAT)
245 req->result = fstat64 (req->fd, req->statdata);
246 else
247 { 268 {
269 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break;
270 case REQ_WRITE: req->result = pwrite64(req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break;
271 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
272 case REQ_CLOSE: req->result = close (req->fd); break;
273 case REQ_STAT: req->result = stat64 (req->dataptr, req->statdata); break;
274 case REQ_LSTAT: req->result = lstat64 (req->dataptr, req->statdata); break;
275 case REQ_FSTAT: req->result = fstat64 (req->fd, req->statdata); break;
276
277 case REQ_QUIT:
278 default:
248 write (respipe[1], (void *)&req, sizeof (req)); 279 write (respipe[1], (void *)&req, sizeof (req));
249 break; 280 return 0;
250 } 281 }
251 282
252 req->errorno = errno; 283 req->errorno = errno;
253 write (respipe[1], (void *)&req, sizeof (req)); 284 write (respipe[1], (void *)&req, sizeof (req));
254 } 285 }
… …
266 sigdelset (&fullsigset, SIGABRT); 297 sigdelset (&fullsigset, SIGABRT);
267 sigdelset (&fullsigset, SIGINT); 298 sigdelset (&fullsigset, SIGINT);
268 299
269 if (pipe (reqpipe) || pipe (respipe)) 300 if (pipe (reqpipe) || pipe (respipe))
270 croak ("unable to initialize request or result pipe"); 301 croak ("unable to initialize request or result pipe");
302
303 if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK))
304 croak ("cannot set result pipe to nonblocking mode");
271 305
272 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) 306 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
273 croak ("cannot set result pipe to nonblocking mode"); 307 croak ("cannot set result pipe to nonblocking mode");
274} 308}
275 309
… …
291 { 325 {
292 end_thread (); 326 end_thread ();
293 cur--; 327 cur--;
294 } 328 }
295 329
296 poll_cb ();
297 while (started > nthreads) 330 while (started > nthreads)
298 { 331 {
299 sched_yield (); 332 fd_set rfd;
300 fcntl (respipe[0], F_SETFL, 0); 333 FD_ZERO(&rfd);
334 FD_SET(respipe[0], &rfd);
335
336 select (respipe[0] + 1, &rfd, 0, 0, 0);
301 poll_cb (); 337 poll_cb (aTHX);
302 fcntl (respipe[0], F_SETFL, O_NONBLOCK);
303 } 338 }
304 339
305void 340void
306aio_open(pathname,flags,mode,callback) 341aio_open(pathname,flags,mode,callback)
307 SV * pathname 342 SV * pathname
… …
310 SV * callback 345 SV * callback
311 PROTOTYPE: $$$$ 346 PROTOTYPE: $$$$
312 CODE: 347 CODE:
313 aio_req req; 348 aio_req req;
314 349
315 New (0, req, 1, aio_cb); 350 Newz (0, req, 1, aio_cb);
316 351
317 if (!req) 352 if (!req)
318 croak ("out of memory during aio_req allocation"); 353 croak ("out of memory during aio_req allocation");
319 354
320 req->type = REQ_OPEN; 355 req->type = REQ_OPEN;
321 req->savesv = newSVsv (pathname); 356 req->data = newSVsv (pathname);
322 req->dataptr = SvPV_nolen (req->savesv); 357 req->dataptr = SvPV_nolen (req->data);
323 req->fd = flags; 358 req->fd = flags;
324 req->mode = mode; 359 req->mode = mode;
325 req->callback = SvREFCNT_inc (callback); 360 req->callback = SvREFCNT_inc (callback);
326 361
327 send_req (req); 362 send_req (req);
328 363
329void 364void
330aio_close(fh,callback) 365aio_close(fh,callback)
331 InputStream fh 366 InputStream fh
332 SV * callback 367 SV * callback
333 PROTOTYPE: $ 368 PROTOTYPE: $$
334 CODE: 369 CODE:
335 aio_req req; 370 aio_req req;
336 371
337 New (0, req, 1, aio_cb); 372 Newz (0, req, 1, aio_cb);
338 373
339 if (!req) 374 if (!req)
340 croak ("out of memory during aio_req allocation"); 375 croak ("out of memory during aio_req allocation");
341 376
342 req->type = REQ_CLOSE; 377 req->type = REQ_CLOSE;
… …
377 ALIAS: 412 ALIAS:
378 aio_lstat = 1 413 aio_lstat = 1
379 CODE: 414 CODE:
380 aio_req req; 415 aio_req req;
381 416
382 New (0, req, 1, aio_cb); 417 Newz (0, req, 1, aio_cb);
383 418
384 if (!req) 419 if (!req)
385 croak ("out of memory during aio_req allocation"); 420 croak ("out of memory during aio_req allocation");
386 421
387 New (0, req->statdata, 1, struct stat64); 422 New (0, req->statdata, 1, struct stat64);
… …
390 croak ("out of memory during aio_req->statdata allocation"); 425 croak ("out of memory during aio_req->statdata allocation");
391 426
392 if (SvPOK (fh_or_path)) 427 if (SvPOK (fh_or_path))
393 { 428 {
394 req->type = ix ? REQ_LSTAT : REQ_STAT; 429 req->type = ix ? REQ_LSTAT : REQ_STAT;
395 req->savesv = newSVsv (fh_or_path); 430 req->data = newSVsv (fh_or_path);
396 req->dataptr = SvPV_nolen (req->savesv); 431 req->dataptr = SvPV_nolen (req->data);
397 } 432 }
398 else 433 else
399 { 434 {
400 req->type = REQ_FSTAT; 435 req->type = REQ_FSTAT;
401 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 436 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));

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