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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.156 by root, Thu Nov 12 00:01:52 2009 UTC vs.
Revision 1.171 by root, Wed Aug 4 17:16:19 2010 UTC

11#include <stddef.h> 11#include <stddef.h>
12#include <stdlib.h> 12#include <stdlib.h>
13#include <errno.h> 13#include <errno.h>
14#include <sys/types.h> 14#include <sys/types.h>
15#include <sys/stat.h> 15#include <sys/stat.h>
16#include <sys/statvfs.h>
16#include <limits.h> 17#include <limits.h>
17#include <fcntl.h> 18#include <fcntl.h>
18#include <sched.h> 19#include <sched.h>
20
21#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
22# include <sys/mman.h>
23#endif
19 24
20/* perl namespace pollution */ 25/* perl namespace pollution */
21#undef VERSION 26#undef VERSION
22 27
23#ifdef _WIN32 28#ifdef _WIN32
119 124
120#ifndef POSIX_FADV_NORMAL 125#ifndef POSIX_FADV_NORMAL
121# define POSIX_FADV_NORMAL 0 126# define POSIX_FADV_NORMAL 0
122# define NO_FADVISE 1 127# define NO_FADVISE 1
123#endif 128#endif
124
125#ifndef POSIX_FADV_SEQUENTIAL 129#ifndef POSIX_FADV_SEQUENTIAL
126# define POSIX_FADV_SEQUENTIAL 0 130# define POSIX_FADV_SEQUENTIAL 0
127#endif 131#endif
128
129#ifndef POSIX_FADV_RANDOM 132#ifndef POSIX_FADV_RANDOM
130# define POSIX_FADV_RANDOM 0 133# define POSIX_FADV_RANDOM 0
131#endif 134#endif
132
133#ifndef POSIX_FADV_NOREUSE 135#ifndef POSIX_FADV_NOREUSE
134# define POSIX_FADV_NOREUSE 0 136# define POSIX_FADV_NOREUSE 0
135#endif 137#endif
136
137#ifndef POSIX_FADV_WILLNEED 138#ifndef POSIX_FADV_WILLNEED
138# define POSIX_FADV_WILLNEED 0 139# define POSIX_FADV_WILLNEED 0
139#endif 140#endif
140
141#ifndef POSIX_FADV_DONTNEED 141#ifndef POSIX_FADV_DONTNEED
142# define POSIX_FADV_DONTNEED 0 142# define POSIX_FADV_DONTNEED 0
143#endif
144
145#if _XOPEN_SOURCE < 600 || NO_FADVISE
146# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
147#endif
148
149#ifndef POSIX_MADV_NORMAL
150# define POSIX_MADV_NORMAL 0
151# define NO_MADVISE 1
152#endif
153#ifndef POSIX_MADV_SEQUENTIAL
154# define POSIX_MADV_SEQUENTIAL 0
155#endif
156#ifndef POSIX_MADV_RANDOM
157# define POSIX_MADV_RANDOM 0
158#endif
159#ifndef POSIX_MADV_WILLNEED
160# define POSIX_MADV_WILLNEED 0
161#endif
162#ifndef POSIX_MADV_DONTNEED
163# define POSIX_MADV_DONTNEED 0
164#endif
165
166#if _XOPEN_SOURCE < 600 || NO_MADVISE
167# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
168#endif
169
170#ifndef PROT_NONE
171# define PROT_NONE 0
172#endif
173#ifndef PROT_READ
174# define PROT_READ 0
175#endif
176#ifndef PROT_WRITE
177# define PROT_READ 0
178#endif
179#ifndef PROT_EXEC
180# define PROT_EXEC 0
181#endif
182
183#ifndef ST_NODEV
184# define ST_NODEV 0
185#endif
186#ifndef ST_NOEXEC
187# define ST_NOEXEC 0
188#endif
189#ifndef ST_SYNCHRONOUS
190# define ST_SYNCHRONOUS 0
191#endif
192#ifndef ST_MANDLOCK
193# define ST_MANDLOCK 0
194#endif
195#ifndef ST_WRITE
196# define ST_WRITE 0
197#endif
198#ifndef ST_APPEND
199# define ST_APPEND 0
200#endif
201#ifndef ST_IMMUTABLE
202# define ST_IMMUTABLE 0
203#endif
204#ifndef ST_NOATIME
205# define ST_NOATIME 0
206#endif
207#ifndef ST_NODIRATIME
208# define ST_NODIRATIME 0
209#endif
210#ifndef ST_RELATIME
211# define ST_RELATIME 0
212#endif
213
214#ifndef MCL_CURRENT
215# define MCL_CURRENT 0
216#endif
217#ifndef MCL_FUTURE
218# define MCL_FUTURE 0
219#endif
220
221#ifndef MAP_ANONYMOUS
222# ifdef MAP_ANON
223# define MAP_ANONYMOUS MAP_ANON
224# else
225# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
226# endif
227#endif
228#ifndef MAP_HUGETLB
229# define MAP_HUGETLB 0
230#endif
231#ifndef MAP_LOCKED
232# define MAP_LOCKED 0
233#endif
234#ifndef MAP_NORESERVE
235# define MAP_NORESERVE 0
236#endif
237#ifndef MAP_POPULATE
238# define MAP_POPULATE 0
239#endif
240#ifndef MAP_NONBLOCK
241# define MAP_NONBLOCK 0
242#endif
243
244#ifndef PAGESIZE
245# define PAGESIZE sysconf (_SC_PAGESIZE)
143#endif 246#endif
144 247
145static int req_invoke (eio_req *req); 248static int req_invoke (eio_req *req);
146#define EIO_FINISH(req) req_invoke (req) 249#define EIO_FINISH(req) req_invoke (req)
147static void req_destroy (eio_req *grp); 250static void req_destroy (eio_req *grp);
239 } 342 }
240} 343}
241 344
242static int req_invoke (eio_req *req) 345static int req_invoke (eio_req *req)
243{ 346{
244 dSP;
245
246 if (req->flags & FLAG_SV2_RO_OFF) 347 if (req->flags & FLAG_SV2_RO_OFF)
247 SvREADONLY_off (req->sv2); 348 SvREADONLY_off (req->sv2);
248 349
249 if (!EIO_CANCELLED (req) && req->callback) 350 if (!EIO_CANCELLED (req) && req->callback)
250 { 351 {
352 dSP;
353 static SV *sv_result_cache; /* caches the result integer SV */
354 SV *sv_result;
355
251 ENTER; 356 ENTER;
252 SAVETMPS; 357 SAVETMPS;
253 PUSHMARK (SP); 358 PUSHMARK (SP);
254 EXTEND (SP, 1); 359 EXTEND (SP, 1);
360
361 /* do not recreate the result IV from scratch each time */
362 if (expect_true (sv_result_cache))
363 {
364 sv_result = sv_result_cache; sv_result_cache = 0;
365 SvIV_set (sv_result, req->result);
366 }
367 else
368 {
369 sv_result = newSViv (req->result);
370 SvREADONLY_on (sv_result);
371 }
255 372
256 switch (req->type) 373 switch (req->type)
257 { 374 {
258 case EIO_READDIR: 375 case EIO_READDIR:
259 { 376 {
345 462
346 PUSHs (fh); 463 PUSHs (fh);
347 } 464 }
348 break; 465 break;
349 466
467 case EIO_STATVFS:
468 case EIO_FSTATVFS:
469 {
470 SV *rv = &PL_sv_undef;
471
472 if (req->result >= 0)
473 {
474 EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
475 HV *hv = newHV ();
476
477 rv = sv_2mortal (newRV_noinc ((SV *)hv));
478
479 hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
480 hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
481 hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
482 hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
483 hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
484 hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
485 hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
486 hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
487 hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
488 hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
489 hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
490 }
491
492 PUSHs (rv);
493 }
494
495 break;
496
350 case EIO_GROUP: 497 case EIO_GROUP:
351 req->int1 = 2; /* mark group as finished */ 498 req->int1 = 2; /* mark group as finished */
352 499
353 if (req->sv1) 500 if (req->sv1)
354 { 501 {
374 case EIO_LSTAT: 521 case EIO_LSTAT:
375 case EIO_FSTAT: 522 case EIO_FSTAT:
376 PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT; 523 PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
377 PL_laststatval = req->result; 524 PL_laststatval = req->result;
378 PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2); 525 PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
379 PUSHs (sv_2mortal (newSViv (req->result))); 526 PUSHs (sv_result);
380 break; 527 break;
381 528
382 case EIO_READ: 529 case EIO_READ:
383 { 530 {
384 SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0)); 531 SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
385 *SvEND (req->sv2) = 0; 532 *SvEND (req->sv2) = 0;
386 SvPOK_only (req->sv2); 533 SvPOK_only (req->sv2);
387 SvSETMAGIC (req->sv2); 534 SvSETMAGIC (req->sv2);
388 PUSHs (sv_2mortal (newSViv (req->result))); 535 PUSHs (sv_result);
389 } 536 }
390 break; 537 break;
391 538
392 case EIO_DUP2: 539 case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), su fudge result value */
393 if (req->result > 0) 540 if (req->result > 0)
394 req->result = 0; 541 SvIV_set (sv_result, 0);
395 /* FALLTHROUGH */ 542 /* FALLTHROUGH */
396 543
397 default: 544 default:
398 PUSHs (sv_2mortal (newSViv (req->result))); 545 PUSHs (sv_result);
399 break; 546 break;
400 } 547 }
401 548
402 errno = req->errorno; 549 errno = req->errorno;
403 550
404 PUTBACK; 551 PUTBACK;
405 call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD); 552 call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
406 SPAGAIN; 553 SPAGAIN;
554
555 if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
556 SvREFCNT_dec (sv_result);
557 else
558 sv_result_cache = sv_result;
407 559
408 FREETMPS; 560 FREETMPS;
409 LEAVE; 561 LEAVE;
410 562
411 PUTBACK; 563 PUTBACK;
486 638
487static void atfork_child (void) 639static void atfork_child (void)
488{ 640{
489 create_respipe (); 641 create_respipe ();
490} 642}
643
644/*****************************************************************************/
645
646#if !_POSIX_MAPPED_FILES
647# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
648# define munmap(addr,length) (errno = ENOSYS, -1)
649# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
650#endif
651
652#define MMAP_MAGIC PERL_MAGIC_ext
653
654static int
655mmap_free (pTHX_ SV *sv, MAGIC *mg)
656{
657 int old_errno = errno;
658 munmap (mg->mg_ptr, (size_t)mg->mg_obj);
659 errno = old_errno;
660
661 mg->mg_obj = 0; /* just in case */
662
663 SvREADONLY_off (sv);
664
665 if (SvPVX (sv) != mg->mg_ptr)
666 croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
667
668 SvCUR_set (sv, 0);
669 SvPVX (sv) = 0;
670 SvOK_off (sv);
671
672 return 0;
673}
674
675static MGVTBL mmap_vtbl = {
676 0, 0, 0, 0, mmap_free
677};
678
679/*****************************************************************************/
491 680
492static SV * 681static SV *
493get_cb (SV *cb_sv) 682get_cb (SV *cb_sv)
494{ 683{
495 SvGETMAGIC (cb_sv); 684 SvGETMAGIC (cb_sv);
527{ 716{
528 static const struct { 717 static const struct {
529 const char *name; 718 const char *name;
530 IV iv; 719 IV iv;
531 } *civ, const_iv[] = { 720 } *civ, const_iv[] = {
532# define const_iv(name, value) { # name, (IV) value }, 721# define const_niv(name, value) { # name, (IV) value },
722# define const_iv(name) { # name, (IV) name },
533# define const_eio(name) { # name, (IV) EIO_ ## name }, 723# define const_eio(name) { # name, (IV) EIO_ ## name },
534 const_iv (EXDEV , EXDEV) 724 const_iv (EXDEV)
535 const_iv (ENOSYS , ENOSYS) 725 const_iv (ENOSYS)
536 const_iv (O_RDONLY, O_RDONLY) 726 const_iv (O_RDONLY)
537 const_iv (O_WRONLY, O_WRONLY) 727 const_iv (O_WRONLY)
728 const_iv (O_RDWR)
538 const_iv (O_CREAT , O_CREAT) 729 const_iv (O_CREAT)
539 const_iv (O_TRUNC , O_TRUNC) 730 const_iv (O_TRUNC)
731 const_iv (O_EXCL)
732 const_iv (O_APPEND)
540#ifndef _WIN32 733#ifndef _WIN32
541 const_iv (S_IFIFO , S_IFIFO) 734 const_iv (S_IFIFO)
542#endif 735#endif
543 const_iv (FADV_NORMAL , POSIX_FADV_NORMAL) 736 const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
544 const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL) 737 const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
545 const_iv (FADV_RANDOM , POSIX_FADV_RANDOM) 738 const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
546 const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE) 739 const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
547 const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED) 740 const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
548 const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED) 741 const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
742
743 const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
744 const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
745 const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
746 const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
747 const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
748
749 const_iv (ST_RDONLY)
750 const_iv (ST_NOSUID)
751 const_iv (ST_NODEV)
752 const_iv (ST_NOEXEC)
753 const_iv (ST_SYNCHRONOUS)
754 const_iv (ST_MANDLOCK)
755 const_iv (ST_WRITE)
756 const_iv (ST_APPEND)
757 const_iv (ST_IMMUTABLE)
758 const_iv (ST_NOATIME)
759 const_iv (ST_NODIRATIME)
760 const_iv (ST_RELATIME)
761
762 const_iv (PROT_NONE)
763 const_iv (PROT_EXEC)
764 const_iv (PROT_READ)
765 const_iv (PROT_WRITE)
766
767 /*const_iv (MAP_FIXED)*/
768 const_iv (MAP_PRIVATE)
769 const_iv (MAP_SHARED)
770 const_iv (MAP_ANONYMOUS)
771
772 /* linuxish */
773 const_iv (MAP_HUGETLB)
774 const_iv (MAP_LOCKED)
775 const_iv (MAP_NORESERVE)
776 const_iv (MAP_POPULATE)
777 const_iv (MAP_NONBLOCK)
778
779 const_iv (MCL_FUTURE)
780 const_iv (MCL_CURRENT)
781
782 const_eio (MS_ASYNC)
783 const_eio (MS_INVALIDATE)
784 const_eio (MS_SYNC)
785
786 const_eio (MT_MODIFY)
549 787
550 const_eio (SYNC_FILE_RANGE_WAIT_BEFORE) 788 const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
551 const_eio (SYNC_FILE_RANGE_WRITE) 789 const_eio (SYNC_FILE_RANGE_WRITE)
552 const_eio (SYNC_FILE_RANGE_WAIT_AFTER) 790 const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
553 791
571 aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1); 809 aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
572 aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1); 810 aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
573 811
574 for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; ) 812 for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
575 newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv)); 813 newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
814
815 newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
576 816
577 create_respipe (); 817 create_respipe ();
578 818
579 if (eio_init (want_poll, done_poll) < 0) 819 if (eio_init (want_poll, done_poll) < 0)
580 croak ("IO::AIO: unable to initialise eio library"); 820 croak ("IO::AIO: unable to initialise eio library");
807} 1047}
808 1048
809void 1049void
810aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef) 1050aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
811 ALIAS: 1051 ALIAS:
812 aio_stat = EIO_STAT 1052 aio_stat = EIO_STAT
813 aio_lstat = EIO_LSTAT 1053 aio_lstat = EIO_LSTAT
1054 aio_statvfs = EIO_STATVFS
814 PPCODE: 1055 PPCODE:
815{ 1056{
816 dREQ; 1057 dREQ;
817 1058
818 req->sv1 = newSVsv (fh_or_path); 1059 req->sv1 = newSVsv (fh_or_path);
822 req->type = ix; 1063 req->type = ix;
823 req->ptr1 = SvPVbyte_nolen (req->sv1); 1064 req->ptr1 = SvPVbyte_nolen (req->sv1);
824 } 1065 }
825 else 1066 else
826 { 1067 {
827 req->type = EIO_FSTAT; 1068 req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
828 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1069 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
829 } 1070 }
830 1071
831 REQ_SEND; 1072 REQ_SEND;
832} 1073}
992 req->ptr1 = SvPVbyte_nolen (req->sv1); 1233 req->ptr1 = SvPVbyte_nolen (req->sv1);
993 req->int2 = (mode_t)mode; 1234 req->int2 = (mode_t)mode;
994 req->offs = dev; 1235 req->offs = dev;
995 1236
996 REQ_SEND; 1237 REQ_SEND;
1238}
1239
1240void
1241aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1242 ALIAS:
1243 aio_mtouch = EIO_MTOUCH
1244 aio_msync = EIO_MSYNC
1245 PROTOTYPE: $$$$;$
1246 PPCODE:
1247{
1248 STRLEN svlen;
1249 UV len = SvUV (length);
1250 char *svptr = SvPVbyte (data, svlen);
1251
1252 if (offset < 0)
1253 offset += svlen;
1254
1255 if (offset < 0 || offset > svlen)
1256 croak ("offset outside of scalar");
1257
1258 if (!SvOK (length) || len + offset > svlen)
1259 len = svlen - offset;
1260
1261 {
1262 dREQ;
1263
1264 req->type = ix;
1265 req->size = len;
1266 req->sv2 = SvREFCNT_inc (data);
1267 req->ptr2 = (char *)svptr + offset;
1268 req->int1 = flags;
1269
1270 REQ_SEND;
1271 }
997} 1272}
998 1273
999void 1274void
1000aio_busy (double delay, SV *callback=&PL_sv_undef) 1275aio_busy (double delay, SV *callback=&PL_sv_undef)
1001 PPCODE: 1276 PPCODE:
1132 1407
1133int 1408int
1134fadvise (aio_rfd fh, off_t offset, off_t length, IV advice) 1409fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
1135 PROTOTYPE: $$$$ 1410 PROTOTYPE: $$$$
1136 CODE: 1411 CODE:
1137#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
1138 RETVAL = posix_fadvise (fh, offset, length, advice); 1412 RETVAL = posix_fadvise (fh, offset, length, advice);
1139#else
1140 RETVAL = errno = ENOSYS;
1141#endif
1142 OUTPUT: 1413 OUTPUT:
1143 RETVAL 1414 RETVAL
1144 1415
1145ssize_t 1416ssize_t
1146sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count) 1417sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
1147 PROTOTYPE: $$$$ 1418 PROTOTYPE: $$$$
1148 CODE: 1419 CODE:
1149 eio_sendfile_sync (ofh, ifh, offset, count); 1420 RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
1421 OUTPUT:
1422 RETVAL
1423
1424void
1425mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
1426 PROTOTYPE: $$$$$;$
1427 PPCODE:
1428 sv_unmagic (scalar, MMAP_MAGIC);
1429{
1430 int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
1431 void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
1432 if (addr == (void *)-1)
1433 XSRETURN_NO;
1434
1435 sv_force_normal (scalar);
1436
1437 /* we store the length in mg_obj, as namlen is I32 :/ */
1438 sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
1439 ->mg_obj = (SV *)length;
1440
1441 SvUPGRADE (scalar, SVt_PV); /* nop... */
1442
1443 if (!(prot & PROT_WRITE))
1444 SvREADONLY_on (scalar);
1445
1446 if (SvLEN (scalar))
1447 Safefree (SvPVX (scalar));
1448
1449 SvPVX (scalar) = (char *)addr;
1450 SvCUR_set (scalar, length);
1451 SvLEN_set (scalar, 0);
1452 SvPOK_only (scalar);
1453
1454 XSRETURN_YES;
1455}
1456
1457void
1458munmap (SV *scalar)
1459 PROTOTYPE: $
1460 CODE:
1461 sv_unmagic (scalar, MMAP_MAGIC);
1462
1463int
1464madvise (SV *scalar, off_t offset, off_t length, IV advice_or_prot)
1465 ALIAS:
1466 mprotect = 1
1467 PROTOTYPE: $$$$
1468 CODE:
1469{
1470 STRLEN cur;
1471 char *addr = SvPVbyte (scalar, cur);
1472
1473 if (offset > cur)
1474 RETVAL = errno = EFAULT;
1475 else
1476 {
1477 if (!SvOK (ST (2)))
1478 length = cur - offset;
1479
1480 if (offset + length > cur)
1481 RETVAL = errno = EFAULT;
1482 else
1483 switch (ix)
1484 {
1485 case 0: RETVAL = posix_madvise (addr + offset, length, advice_or_prot); break;
1486 case 1: RETVAL = mprotect (addr + offset, length, advice_or_prot); break;
1487 }
1488 }
1489}
1490 OUTPUT:
1491 RETVAL
1492
1493int
1494mlockall (int flags)
1495 PROTOTYPE: $
1496 CODE:
1497#if _POSIX_MEMLOCK
1498#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
1499 extern int mallopt (int, int);
1500 mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
1501#endif
1502 mlockall (flags);
1503#else
1504 RETVAL = -1;
1505 errno = ENOSYS;
1506#endif
1507 OUTPUT:
1508 RETVAL
1509
1510int
1511munlockall ()
1512 PROTOTYPE:
1513 CODE:
1514#if _POSIX_MEMLOCK
1515 munlockall ();
1516#else
1517 RETVAL = -1;
1518 errno = ENOSYS;
1519#endif
1520 OUTPUT:
1521 RETVAL
1150 1522
1151void _on_next_submit (SV *cb) 1523void _on_next_submit (SV *cb)
1152 CODE: 1524 CODE:
1153 SvREFCNT_dec (on_next_submit); 1525 SvREFCNT_dec (on_next_submit);
1154 on_next_submit = SvOK (cb) ? newSVsv (cb) : 0; 1526 on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;

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