| 1 |
#include "EXTERN.h" |
| 2 |
#include "perl.h" |
| 3 |
#include "XSUB.h" |
| 4 |
|
| 5 |
#include <sys/types.h> |
| 6 |
#include <sys/stat.h> |
| 7 |
#include <unistd.h> |
| 8 |
#include <fcntl.h> |
| 9 |
#include <signal.h> |
| 10 |
#include <sched.h> |
| 11 |
|
| 12 |
typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
| 13 |
typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
| 14 |
typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
| 15 |
|
| 16 |
#define STACKSIZE 1024 /* yeah */ |
| 17 |
|
| 18 |
enum { REQ_QUIT, REQ_OPEN, REQ_CLOSE, REQ_READ, REQ_WRITE, REQ_STAT, REQ_LSTAT, REQ_FSTAT}; |
| 19 |
|
| 20 |
typedef struct { |
| 21 |
char stack[STACKSIZE]; |
| 22 |
} aio_thread; |
| 23 |
|
| 24 |
typedef struct { |
| 25 |
int type; |
| 26 |
aio_thread *thread; |
| 27 |
|
| 28 |
SV *savesv; |
| 29 |
|
| 30 |
int fd; |
| 31 |
off_t offset; |
| 32 |
size_t length; |
| 33 |
ssize_t result; |
| 34 |
mode_t mode; /* open */ |
| 35 |
int errorno; |
| 36 |
SV *data, *callback; |
| 37 |
void *dataptr; |
| 38 |
STRLEN dataoffset; |
| 39 |
|
| 40 |
struct stat64 *statdata; |
| 41 |
} aio_cb; |
| 42 |
|
| 43 |
typedef aio_cb *aio_req; |
| 44 |
|
| 45 |
static int started; |
| 46 |
static int nreqs; |
| 47 |
static int reqpipe[2], respipe[2]; |
| 48 |
|
| 49 |
static int aio_proc(void *arg); |
| 50 |
|
| 51 |
static void |
| 52 |
start_thread(void) |
| 53 |
{ |
| 54 |
aio_thread *thr; |
| 55 |
|
| 56 |
New (0, thr, 1, aio_thread); |
| 57 |
|
| 58 |
if (clone (aio_proc, |
| 59 |
&(thr->stack[STACKSIZE]), |
| 60 |
CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND, |
| 61 |
thr) >= 0) |
| 62 |
started++; |
| 63 |
else |
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Safefree (thr); |
| 65 |
} |
| 66 |
|
| 67 |
static void |
| 68 |
end_thread(void) |
| 69 |
{ |
| 70 |
aio_req req; |
| 71 |
New (0, req, 1, aio_cb); |
| 72 |
req->type = REQ_QUIT; |
| 73 |
write (reqpipe[1], &req, sizeof (aio_req)); |
| 74 |
} |
| 75 |
|
| 76 |
static void |
| 77 |
send_req (aio_req req) |
| 78 |
{ |
| 79 |
nreqs++; |
| 80 |
write (reqpipe[1], &req, sizeof (aio_req)); |
| 81 |
} |
| 82 |
|
| 83 |
static void |
| 84 |
read_write (pTHX_ int dowrite, int fd, off_t offset, size_t length, |
| 85 |
SV *data, STRLEN dataoffset, SV*callback) |
| 86 |
{ |
| 87 |
aio_req req; |
| 88 |
STRLEN svlen; |
| 89 |
char *svptr = SvPV (data, svlen); |
| 90 |
|
| 91 |
SvUPGRADE (data, SVt_PV); |
| 92 |
SvPOK_on (data); |
| 93 |
|
| 94 |
if (dataoffset < 0) |
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dataoffset += svlen; |
| 96 |
|
| 97 |
if (dataoffset < 0 || dataoffset > svlen) |
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croak ("data offset outside of string"); |
| 99 |
|
| 100 |
if (dowrite) |
| 101 |
{ |
| 102 |
/* write: check length and adjust. */ |
| 103 |
if (length < 0 || length + dataoffset > svlen) |
| 104 |
length = svlen - dataoffset; |
| 105 |
} |
| 106 |
else |
| 107 |
{ |
| 108 |
/* read: grow scalar as necessary */ |
| 109 |
svptr = SvGROW (data, length + dataoffset); |
| 110 |
} |
| 111 |
|
| 112 |
if (length < 0) |
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croak ("length must not be negative"); |
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|
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New (0, req, 1, aio_cb); |
| 116 |
|
| 117 |
if (!req) |
| 118 |
croak ("out of memory during aio_req allocation"); |
| 119 |
|
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req->type = dowrite ? REQ_WRITE : REQ_READ; |
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req->fd = fd; |
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req->offset = offset; |
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req->length = length; |
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req->data = SvREFCNT_inc (data); |
| 125 |
req->dataptr = (char *)svptr + dataoffset; |
| 126 |
req->callback = SvREFCNT_inc (callback); |
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|
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send_req (req); |
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} |
| 130 |
|
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static int |
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poll_cb (pTHX) |
| 133 |
{ |
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dSP; |
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int count = 0; |
| 136 |
aio_req req; |
| 137 |
|
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while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) |
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{ |
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if (req->type == REQ_QUIT) |
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{ |
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Safefree (req->thread); |
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started--; |
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} |
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else |
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{ |
| 147 |
int errorno = errno; |
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errno = req->errorno; |
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|
| 150 |
if (req->savesv) |
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SvREFCNT_dec (req->savesv); |
| 152 |
|
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if (req->type == REQ_READ) |
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SvCUR_set (req->data, req->dataoffset |
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+ req->result > 0 ? req->result : 0); |
| 156 |
|
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if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) |
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{ |
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PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
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PL_laststatval = req->result; |
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PL_statcache.st_dev = req->statdata->st_dev; |
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PL_statcache.st_ino = req->statdata->st_ino; |
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PL_statcache.st_mode = req->statdata->st_mode; |
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PL_statcache.st_nlink = req->statdata->st_nlink; |
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PL_statcache.st_uid = req->statdata->st_uid; |
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PL_statcache.st_gid = req->statdata->st_gid; |
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PL_statcache.st_rdev = req->statdata->st_rdev; |
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PL_statcache.st_size = req->statdata->st_size; |
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PL_statcache.st_atime = req->statdata->st_atime; |
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PL_statcache.st_mtime = req->statdata->st_mtime; |
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PL_statcache.st_ctime = req->statdata->st_ctime; |
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PL_statcache.st_blksize = req->statdata->st_blksize; |
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PL_statcache.st_blocks = req->statdata->st_blocks; |
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|
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Safefree (req->statdata); |
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} |
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|
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PUSHMARK (SP); |
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XPUSHs (sv_2mortal (newSViv (req->result))); |
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PUTBACK; |
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call_sv (req->callback, G_VOID); |
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SPAGAIN; |
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|
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SvREFCNT_dec (req->data); |
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SvREFCNT_dec (req->callback); |
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|
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errno = errorno; |
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nreqs--; |
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count++; |
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} |
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|
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Safefree (req); |
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} |
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|
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return count; |
| 196 |
} |
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|
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static sigset_t fullsigset; |
| 199 |
|
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#undef errno |
| 201 |
#include <asm/unistd.h> |
| 202 |
|
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static int |
| 204 |
aio_proc(void *thr_arg) |
| 205 |
{ |
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aio_thread *thr = thr_arg; |
| 207 |
aio_req req; |
| 208 |
int errno; |
| 209 |
|
| 210 |
/* we rely on gcc's ability to create closures. */ |
| 211 |
_syscall3(int,read,int,fd,char *,buf,size_t,count) |
| 212 |
_syscall3(int,write,int,fd,char *,buf,size_t,count) |
| 213 |
|
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_syscall3(int,open,char *,pathname,int,flags,mode_t,mode) |
| 215 |
_syscall1(int,close,int,fd) |
| 216 |
|
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_syscall4(int,pread,int,fd,char *,buf,size_t,count,off_t,offset) |
| 218 |
_syscall4(int,pwrite,int,fd,char *,buf,size_t,count,off_t,offset) |
| 219 |
|
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_syscall2(int,stat64, const char *, filename, struct stat64 *, buf) |
| 221 |
_syscall2(int,lstat64, const char *, filename, struct stat64 *, buf) |
| 222 |
_syscall2(int,fstat64, int, fd, struct stat64 *, buf) |
| 223 |
|
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sigprocmask (SIG_SETMASK, &fullsigset, 0); |
| 225 |
|
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/* then loop */ |
| 227 |
while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) |
| 228 |
{ |
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req->thread = thr; |
| 230 |
errno = 0; |
| 231 |
|
| 232 |
if (req->type == REQ_READ) |
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req->result = pread (req->fd, req->dataptr, req->length, req->offset); |
| 234 |
else if (req->type == REQ_WRITE) |
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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 |
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{ |
| 248 |
write (respipe[1], (void *)&req, sizeof (req)); |
| 249 |
break; |
| 250 |
} |
| 251 |
|
| 252 |
req->errorno = errno; |
| 253 |
write (respipe[1], (void *)&req, sizeof (req)); |
| 254 |
} |
| 255 |
|
| 256 |
return 0; |
| 257 |
} |
| 258 |
|
| 259 |
MODULE = Linux::AIO PACKAGE = Linux::AIO |
| 260 |
|
| 261 |
BOOT: |
| 262 |
{ |
| 263 |
sigfillset (&fullsigset); |
| 264 |
sigdelset (&fullsigset, SIGTERM); |
| 265 |
sigdelset (&fullsigset, SIGQUIT); |
| 266 |
sigdelset (&fullsigset, SIGABRT); |
| 267 |
sigdelset (&fullsigset, SIGINT); |
| 268 |
|
| 269 |
if (pipe (reqpipe) || pipe (respipe)) |
| 270 |
croak ("unable to initialize request or result pipe"); |
| 271 |
|
| 272 |
if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) |
| 273 |
croak ("cannot set result pipe to nonblocking mode"); |
| 274 |
} |
| 275 |
|
| 276 |
void |
| 277 |
min_parallel(nthreads) |
| 278 |
int nthreads |
| 279 |
PROTOTYPE: $ |
| 280 |
CODE: |
| 281 |
while (nthreads > started) |
| 282 |
start_thread (); |
| 283 |
|
| 284 |
void |
| 285 |
max_parallel(nthreads) |
| 286 |
int nthreads |
| 287 |
PROTOTYPE: $ |
| 288 |
CODE: |
| 289 |
int cur = started; |
| 290 |
while (cur > nthreads) |
| 291 |
{ |
| 292 |
end_thread (); |
| 293 |
cur--; |
| 294 |
} |
| 295 |
|
| 296 |
poll_cb (); |
| 297 |
while (started > nthreads) |
| 298 |
{ |
| 299 |
sched_yield (); |
| 300 |
fcntl (respipe[0], F_SETFL, 0); |
| 301 |
poll_cb (); |
| 302 |
fcntl (respipe[0], F_SETFL, O_NONBLOCK); |
| 303 |
} |
| 304 |
|
| 305 |
void |
| 306 |
aio_open(pathname,flags,mode,callback) |
| 307 |
SV * pathname |
| 308 |
int flags |
| 309 |
int mode |
| 310 |
SV * callback |
| 311 |
PROTOTYPE: $$$$ |
| 312 |
CODE: |
| 313 |
aio_req req; |
| 314 |
|
| 315 |
New (0, req, 1, aio_cb); |
| 316 |
|
| 317 |
if (!req) |
| 318 |
croak ("out of memory during aio_req allocation"); |
| 319 |
|
| 320 |
req->type = REQ_OPEN; |
| 321 |
req->savesv = newSVsv (pathname); |
| 322 |
req->dataptr = SvPV_nolen (req->savesv); |
| 323 |
req->fd = flags; |
| 324 |
req->mode = mode; |
| 325 |
req->callback = SvREFCNT_inc (callback); |
| 326 |
|
| 327 |
send_req (req); |
| 328 |
|
| 329 |
void |
| 330 |
aio_close(fh,callback) |
| 331 |
InputStream fh |
| 332 |
SV * callback |
| 333 |
PROTOTYPE: $ |
| 334 |
CODE: |
| 335 |
aio_req req; |
| 336 |
|
| 337 |
New (0, req, 1, aio_cb); |
| 338 |
|
| 339 |
if (!req) |
| 340 |
croak ("out of memory during aio_req allocation"); |
| 341 |
|
| 342 |
req->type = REQ_CLOSE; |
| 343 |
req->fd = PerlIO_fileno (fh); |
| 344 |
req->callback = SvREFCNT_inc (callback); |
| 345 |
|
| 346 |
send_req (req); |
| 347 |
|
| 348 |
void |
| 349 |
aio_read(fh,offset,length,data,dataoffset,callback) |
| 350 |
InputStream fh |
| 351 |
UV offset |
| 352 |
IV length |
| 353 |
SV * data |
| 354 |
IV dataoffset |
| 355 |
SV * callback |
| 356 |
PROTOTYPE: $$$$$$ |
| 357 |
CODE: |
| 358 |
read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
| 359 |
|
| 360 |
void |
| 361 |
aio_write(fh,offset,length,data,dataoffset,callback) |
| 362 |
OutputStream fh |
| 363 |
UV offset |
| 364 |
IV length |
| 365 |
SV * data |
| 366 |
IV dataoffset |
| 367 |
SV * callback |
| 368 |
PROTOTYPE: $$$$$$ |
| 369 |
CODE: |
| 370 |
read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
| 371 |
|
| 372 |
void |
| 373 |
aio_stat(fh_or_path,callback) |
| 374 |
SV * fh_or_path |
| 375 |
SV * callback |
| 376 |
PROTOTYPE: $$ |
| 377 |
ALIAS: |
| 378 |
aio_lstat = 1 |
| 379 |
CODE: |
| 380 |
aio_req req; |
| 381 |
|
| 382 |
New (0, req, 1, aio_cb); |
| 383 |
|
| 384 |
if (!req) |
| 385 |
croak ("out of memory during aio_req allocation"); |
| 386 |
|
| 387 |
New (0, req->statdata, 1, struct stat64); |
| 388 |
|
| 389 |
if (!req->statdata) |
| 390 |
croak ("out of memory during aio_req->statdata allocation"); |
| 391 |
|
| 392 |
if (SvPOK (fh_or_path)) |
| 393 |
{ |
| 394 |
req->type = ix ? REQ_LSTAT : REQ_STAT; |
| 395 |
req->savesv = newSVsv (fh_or_path); |
| 396 |
req->dataptr = SvPV_nolen (req->savesv); |
| 397 |
} |
| 398 |
else |
| 399 |
{ |
| 400 |
req->type = REQ_FSTAT; |
| 401 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
| 402 |
} |
| 403 |
|
| 404 |
req->callback = SvREFCNT_inc (callback); |
| 405 |
|
| 406 |
send_req (req); |
| 407 |
|
| 408 |
int |
| 409 |
poll_fileno() |
| 410 |
PROTOTYPE: |
| 411 |
CODE: |
| 412 |
RETVAL = respipe[0]; |
| 413 |
OUTPUT: |
| 414 |
RETVAL |
| 415 |
|
| 416 |
int |
| 417 |
poll_cb(...) |
| 418 |
PROTOTYPE: |
| 419 |
CODE: |
| 420 |
RETVAL = poll_cb (aTHX); |
| 421 |
OUTPUT: |
| 422 |
RETVAL |
| 423 |
|
| 424 |
int |
| 425 |
nreqs() |
| 426 |
PROTOTYPE: |
| 427 |
CODE: |
| 428 |
RETVAL = nreqs; |
| 429 |
OUTPUT: |
| 430 |
RETVAL |
| 431 |
|
