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34 | REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, |
34 | REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, |
35 | REQ_FSYNC, REQ_FDATASYNC, |
35 | REQ_FSYNC, REQ_FDATASYNC, |
36 | }; |
36 | }; |
37 | |
37 | |
38 | typedef struct aio_cb { |
38 | typedef struct aio_cb { |
39 | struct aio_cb *next; |
39 | struct aio_cb *volatile next; |
40 | |
40 | |
41 | int type; |
41 | int type; |
42 | |
42 | |
43 | int fd; |
43 | int fd; |
44 | off_t offset; |
44 | off_t offset; |
… | |
… | |
55 | |
55 | |
56 | typedef aio_cb *aio_req; |
56 | typedef aio_cb *aio_req; |
57 | |
57 | |
58 | static int started; |
58 | static int started; |
59 | static int nreqs; |
59 | static int nreqs; |
60 | static int reqpipe[2], respipe[2]; |
60 | static int respipe [2]; |
61 | |
61 | |
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62 | static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; |
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63 | static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; |
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64 | static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; |
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65 | |
62 | static aio_req qs, qe; /* queue start, queue end */ |
66 | static volatile aio_req reqs, reqe; /* queue start, queue end */ |
|
|
67 | static volatile aio_req ress, rese; /* queue start, queue end */ |
63 | |
68 | |
64 | static void *aio_proc(void *arg); |
69 | static void *aio_proc(void *arg); |
65 | |
70 | |
66 | static void |
71 | static void |
67 | start_thread (void) |
72 | start_thread (void) |
… | |
… | |
82 | |
87 | |
83 | sigprocmask (SIG_SETMASK, &oldsigset, 0); |
88 | sigprocmask (SIG_SETMASK, &oldsigset, 0); |
84 | } |
89 | } |
85 | |
90 | |
86 | static void |
91 | static void |
87 | send_reqs (void) |
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88 | { |
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89 | /* this write is atomic */ |
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90 | while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs) |
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91 | { |
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92 | qs = qs->next; |
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93 | if (!qs) qe = 0; |
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94 | } |
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95 | } |
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96 | |
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97 | static void |
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98 | send_req (aio_req req) |
92 | send_req (aio_req req) |
99 | { |
93 | { |
100 | nreqs++; |
94 | nreqs++; |
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95 | |
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96 | pthread_mutex_lock (&reqlock); |
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97 | |
101 | req->next = 0; |
98 | req->next = 0; |
102 | |
99 | |
103 | if (qe) |
100 | if (reqe) |
104 | { |
101 | { |
105 | qe->next = req; |
102 | reqe->next = req; |
106 | qe = req; |
103 | reqe = req; |
107 | } |
104 | } |
108 | else |
105 | else |
109 | qe = qs = req; |
106 | reqe = reqs = req; |
110 | |
107 | |
111 | send_reqs (); |
108 | pthread_cond_signal (&reqwait); |
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109 | pthread_mutex_unlock (&reqlock); |
112 | } |
110 | } |
113 | |
111 | |
114 | static void |
112 | static void |
115 | end_thread (void) |
113 | end_thread (void) |
116 | { |
114 | { |
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171 | } |
169 | } |
172 | |
170 | |
173 | static void |
171 | static void |
174 | poll_wait () |
172 | poll_wait () |
175 | { |
173 | { |
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174 | if (!nreqs) |
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175 | return; |
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176 | |
176 | fd_set rfd; |
177 | fd_set rfd; |
177 | FD_ZERO(&rfd); |
178 | FD_ZERO(&rfd); |
178 | FD_SET(respipe[0], &rfd); |
179 | FD_SET(respipe [0], &rfd); |
179 | |
180 | |
180 | select (respipe[0] + 1, &rfd, 0, 0, 0); |
181 | select (respipe [0] + 1, &rfd, 0, 0, 0); |
181 | } |
182 | } |
182 | |
183 | |
183 | static int |
184 | static int |
184 | poll_cb (pTHX) |
185 | poll_cb (pTHX) |
185 | { |
186 | { |
186 | dSP; |
187 | dSP; |
187 | int count = 0; |
188 | int count = 0; |
188 | aio_req req; |
189 | aio_req req; |
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190 | |
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191 | { |
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192 | /* read and signals sent by the worker threads */ |
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193 | char buf [32]; |
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194 | while (read (respipe [0], buf, 32) > 0) |
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195 | ; |
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196 | } |
189 | |
197 | |
190 | while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) |
198 | for (;;) |
191 | { |
199 | { |
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200 | pthread_mutex_lock (&reslock); |
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201 | |
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202 | req = ress; |
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203 | |
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204 | if (ress) |
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205 | { |
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206 | ress = ress->next; |
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207 | if (!ress) rese = 0; |
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208 | } |
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209 | |
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210 | pthread_mutex_unlock (&reslock); |
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211 | |
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212 | if (!req) |
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213 | break; |
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214 | |
192 | nreqs--; |
215 | nreqs--; |
193 | |
216 | |
194 | if (req->type == REQ_QUIT) |
217 | if (req->type == REQ_QUIT) |
195 | started--; |
218 | started--; |
196 | else |
219 | else |
… | |
… | |
244 | } |
267 | } |
245 | |
268 | |
246 | Safefree (req); |
269 | Safefree (req); |
247 | } |
270 | } |
248 | |
271 | |
249 | if (qs) |
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250 | send_reqs (); |
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251 | |
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252 | return count; |
272 | return count; |
253 | } |
273 | } |
254 | |
274 | |
255 | static void * |
275 | static void * |
256 | aio_proc (void *thr_arg) |
276 | aio_proc (void *thr_arg) |
257 | { |
277 | { |
258 | aio_req req; |
278 | aio_req req; |
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279 | int type; |
259 | |
280 | |
260 | /* then loop */ |
281 | do |
261 | while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) |
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262 | { |
282 | { |
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283 | pthread_mutex_lock (&reqlock); |
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284 | |
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285 | for (;;) |
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286 | { |
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287 | req = reqs; |
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288 | |
|
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289 | if (reqs) |
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290 | { |
|
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291 | reqs = reqs->next; |
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292 | if (!reqs) reqe = 0; |
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293 | } |
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294 | |
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295 | if (req) |
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296 | break; |
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297 | |
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298 | pthread_cond_wait (&reqwait, &reqlock); |
|
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299 | } |
|
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300 | |
|
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301 | pthread_mutex_unlock (&reqlock); |
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302 | |
263 | errno = 0; /* strictly unnecessary */ |
303 | errno = 0; /* strictly unnecessary */ |
264 | |
304 | |
|
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305 | type = req->type; |
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306 | |
265 | switch (req->type) |
307 | switch (type) |
266 | { |
308 | { |
267 | case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; |
309 | case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; |
268 | case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; |
310 | case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; |
269 | #if SYS_readahead |
311 | #if SYS_readahead |
270 | case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
312 | case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
… | |
… | |
282 | |
324 | |
283 | case REQ_FSYNC: req->result = fsync (req->fd); break; |
325 | case REQ_FSYNC: req->result = fsync (req->fd); break; |
284 | case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
326 | case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
285 | |
327 | |
286 | case REQ_QUIT: |
328 | case REQ_QUIT: |
287 | write (respipe[1], (void *)&req, sizeof (req)); |
329 | break; |
288 | return 0; |
|
|
289 | |
330 | |
290 | default: |
331 | default: |
291 | req->result = ENOSYS; |
332 | req->result = ENOSYS; |
292 | break; |
333 | break; |
293 | } |
334 | } |
294 | |
335 | |
295 | req->errorno = errno; |
336 | req->errorno = errno; |
296 | write (respipe[1], (void *)&req, sizeof (req)); |
337 | |
|
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338 | pthread_mutex_lock (&reslock); |
|
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339 | |
|
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340 | req->next = 0; |
|
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341 | |
|
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342 | if (rese) |
|
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343 | { |
|
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344 | rese->next = req; |
|
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345 | rese = req; |
|
|
346 | } |
|
|
347 | else |
|
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348 | { |
|
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349 | rese = ress = req; |
|
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350 | |
|
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351 | /* write a dummy byte to the pipe so fh becomes ready */ |
|
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352 | write (respipe [1], &respipe, 1); |
|
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353 | } |
|
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354 | |
|
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355 | pthread_mutex_unlock (&reslock); |
297 | } |
356 | } |
|
|
357 | while (type != REQ_QUIT); |
298 | |
358 | |
299 | return 0; |
359 | return 0; |
300 | } |
360 | } |
301 | |
361 | |
302 | MODULE = IO::AIO PACKAGE = IO::AIO |
362 | MODULE = IO::AIO PACKAGE = IO::AIO |
303 | |
363 | |
304 | BOOT: |
364 | BOOT: |
305 | { |
365 | { |
306 | if (pipe (reqpipe) || pipe (respipe)) |
366 | if (pipe (respipe)) |
307 | croak ("unable to initialize request or result pipe"); |
367 | croak ("unable to initialize result pipe"); |
308 | |
368 | |
309 | if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK)) |
369 | if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
310 | croak ("cannot set result pipe to nonblocking mode"); |
370 | croak ("cannot set result pipe to nonblocking mode"); |
311 | |
371 | |
312 | if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) |
372 | if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
313 | croak ("cannot set result pipe to nonblocking mode"); |
373 | croak ("cannot set result pipe to nonblocking mode"); |
314 | } |
374 | } |
315 | |
375 | |
316 | void |
376 | void |
317 | min_parallel(nthreads) |
377 | min_parallel(nthreads) |
… | |
… | |
506 | |
566 | |
507 | int |
567 | int |
508 | poll_fileno() |
568 | poll_fileno() |
509 | PROTOTYPE: |
569 | PROTOTYPE: |
510 | CODE: |
570 | CODE: |
511 | RETVAL = respipe[0]; |
571 | RETVAL = respipe [0]; |
512 | OUTPUT: |
572 | OUTPUT: |
513 | RETVAL |
573 | RETVAL |
514 | |
574 | |
515 | int |
575 | int |
516 | poll_cb(...) |
576 | poll_cb(...) |
… | |
… | |
522 | |
582 | |
523 | void |
583 | void |
524 | poll_wait() |
584 | poll_wait() |
525 | PROTOTYPE: |
585 | PROTOTYPE: |
526 | CODE: |
586 | CODE: |
|
|
587 | if (nreqs) |
527 | poll_wait (); |
588 | poll_wait (); |
528 | |
589 | |
529 | int |
590 | int |
530 | nreqs() |
591 | nreqs() |
531 | PROTOTYPE: |
592 | PROTOTYPE: |
532 | CODE: |
593 | CODE: |