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/cvs/cvsroot/libeio/eio.c
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Comparing cvsroot/libeio/eio.c (file contents):
Revision 1.46 by root, Sat Jan 2 12:58:37 2010 UTC vs.
Revision 1.52 by root, Fri Jan 8 09:29:56 2010 UTC

1/* 1/*
2 * libeio implementation 2 * libeio implementation
3 * 3 *
4 * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libeio@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libeio@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
… …
49#include <stdlib.h> 49#include <stdlib.h>
50#include <string.h> 50#include <string.h>
51#include <errno.h> 51#include <errno.h>
52#include <sys/types.h> 52#include <sys/types.h>
53#include <sys/stat.h> 53#include <sys/stat.h>
54#include <sys/statvfs.h>
54#include <limits.h> 55#include <limits.h>
55#include <fcntl.h> 56#include <fcntl.h>
56#include <assert.h> 57#include <assert.h>
57 58
58#ifndef EIO_FINISH 59#ifndef EIO_FINISH
… …
80# include <utime.h> 81# include <utime.h>
81# include <signal.h> 82# include <signal.h>
82# include <dirent.h> 83# include <dirent.h>
83 84
84/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */ 85/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
85# if __freebsd || defined __NetBSD__ || defined __OpenBSD__ 86# if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__
86# define _DIRENT_HAVE_D_TYPE /* sigh */ 87# define _DIRENT_HAVE_D_TYPE /* sigh */
87# define D_INO(de) (de)->d_fileno 88# define D_INO(de) (de)->d_fileno
88# define D_NAMLEN(de) (de)->d_namlen 89# define D_NAMLEN(de) (de)->d_namlen
89# elif __linux || defined d_ino || _XOPEN_SOURCE >= 600 90# elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
90# define D_INO(de) (de)->d_ino 91# define D_INO(de) (de)->d_ino
… …
106#endif 107#endif
107 108
108#if HAVE_SENDFILE 109#if HAVE_SENDFILE
109# if __linux 110# if __linux
110# include <sys/sendfile.h> 111# include <sys/sendfile.h>
111# elif __freebsd || defined __APPLE__ 112# elif __FreeBSD__ || defined __APPLE__
112# include <sys/socket.h> 113# include <sys/socket.h>
113# include <sys/uio.h> 114# include <sys/uio.h>
114# elif __hpux 115# elif __hpux
115# include <sys/socket.h> 116# include <sys/socket.h>
116# elif __solaris 117# elif __solaris
… …
909 910
910#if HAVE_SENDFILE 911#if HAVE_SENDFILE
911# if __linux 912# if __linux
912 res = sendfile (ofd, ifd, &offset, count); 913 res = sendfile (ofd, ifd, &offset, count);
913 914
914# elif __freebsd 915# elif __FreeBSD__
915 /* 916 /*
916 * Of course, the freebsd sendfile is a dire hack with no thoughts 917 * Of course, the freebsd sendfile is a dire hack with no thoughts
917 * wasted on making it similar to other I/O functions. 918 * wasted on making it similar to other I/O functions.
918 */ 919 */
919 { 920 {
920 off_t sbytes; 921 off_t sbytes;
921 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); 922 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
922 923
923 if (res < 0 && sbytes) 924 /* freebsd' sendfile will return 0 on success */
924 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */ 925 /* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */
926 /* not on e.g. EIO or EPIPE - sounds broken */
927 if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0)
925 res = sbytes; 928 res = sbytes;
926 } 929 }
927 930
928# elif defined (__APPLE__) 931# elif defined (__APPLE__)
929 932
930 { 933 {
931 off_t sbytes = count; 934 off_t sbytes = count;
932 res = sendfile (ifd, ofd, offset, &sbytes, 0, 0); 935 res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
933 936
934 if (res < 0 && errno == EAGAIN && sbytes) 937 /* according to the manpage, sbytes is always valid */
938 if (sbytes)
935 res = sbytes; 939 res = sbytes;
936 } 940 }
937 941
938# elif __hpux 942# elif __hpux
939 res = sendfile (ofd, ifd, offset, count, 0, 0); 943 res = sendfile (ofd, ifd, offset, count, 0, 0);
… …
970 errno = ENOSYS; 974 errno = ENOSYS;
971#endif 975#endif
972 976
973 if (res < 0 977 if (res < 0
974 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK 978 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
979 /* BSDs */
980#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */
981 || errno == ENOTSUP
982#endif
983 || errno == EOPNOTSUPP /* BSDs */
975#if __solaris 984#if __solaris
976 || errno == EAFNOSUPPORT || errno == EPROTOTYPE 985 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
977#endif 986#endif
978 ) 987 )
979 ) 988 )
… …
1373 } 1382 }
1374 } 1383 }
1375} 1384}
1376 1385
1377#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO) 1386#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
1378# undef msync
1379# define msync(a,b,c) ((errno = ENOSYS), -1) 1387# define eio__msync(a,b,c) ((errno = ENOSYS), -1)
1388#else
1389
1390int
1391eio__msync (void *mem, size_t len, int flags)
1392{
1393 if (EIO_MS_ASYNC != MS_SYNC
1394 || EIO_MS_INVALIDATE != MS_INVALIDATE
1395 || EIO_MS_SYNC != MS_SYNC)
1396 {
1397 flags = 0
1398 | (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
1399 | (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
1400 | (flags & EIO_MS_SYNC ? MS_SYNC : 0);
1401 }
1402
1403 return msync (mem, len, flags);
1404}
1405
1380#endif 1406#endif
1381 1407
1382int 1408int
1383eio__mtouch (void *mem, size_t len, int flags) 1409eio__mtouch (void *mem, size_t len, int flags)
1384{ 1410{
… …
1395 1421
1396 /* round down to start of page, although this is probably useless */ 1422 /* round down to start of page, although this is probably useless */
1397 addr &= ~(page - 1); /* assume page size is always a power of two */ 1423 addr &= ~(page - 1); /* assume page size is always a power of two */
1398 1424
1399 if (addr < end) 1425 if (addr < end)
1400 if (flags) /* modify */ 1426 if (flags & EIO_MT_MODIFY) /* modify */
1401 do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len); 1427 do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len);
1402 else 1428 else
1403 do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len); 1429 do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len);
1404 1430
1405 return 0; 1431 return 0;
… …
1553 case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); 1579 case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1554 req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break; 1580 req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
1555 case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); 1581 case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1556 req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break; 1582 req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
1557 1583
1584 case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
1585 req->result = statvfs (req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
1586 case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
1587 req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
1588
1558 case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break; 1589 case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
1559 case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break; 1590 case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
1560 case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break; 1591 case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
1561 case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break; 1592 case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
1562 case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break; 1593 case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
… …
1577 req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break; 1608 req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
1578 1609
1579 case EIO_SYNC: req->result = 0; sync (); break; 1610 case EIO_SYNC: req->result = 0; sync (); break;
1580 case EIO_FSYNC: req->result = fsync (req->int1); break; 1611 case EIO_FSYNC: req->result = fsync (req->int1); break;
1581 case EIO_FDATASYNC: req->result = fdatasync (req->int1); break; 1612 case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
1582 case EIO_MSYNC: req->result = msync (req->ptr2, req->size, req->int1); break; 1613 case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
1583 case EIO_MTOUCH: req->result = eio__mtouch (req->ptr2, req->size, req->int1); break; 1614 case EIO_MTOUCH: req->result = eio__mtouch (req->ptr2, req->size, req->int1); break;
1584 case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break; 1615 case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
1585 1616
1586 case EIO_READDIR: eio__scandir (req, self); break; 1617 case EIO_READDIR: eio__scandir (req, self); break;
1587 1618
… …
1709eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data) 1740eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
1710{ 1741{
1711 REQ (EIO_FSTAT); req->int1 = fd; SEND; 1742 REQ (EIO_FSTAT); req->int1 = fd; SEND;
1712} 1743}
1713 1744
1745eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data)
1746{
1747 REQ (EIO_FSTATVFS); req->int1 = fd; SEND;
1748}
1749
1714eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data) 1750eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
1715{ 1751{
1716 REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND; 1752 REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
1717} 1753}
1718 1754
… …
1788} 1824}
1789 1825
1790eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data) 1826eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
1791{ 1827{
1792 return eio__1path (EIO_LSTAT, path, pri, cb, data); 1828 return eio__1path (EIO_LSTAT, path, pri, cb, data);
1829}
1830
1831eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data)
1832{
1833 return eio__1path (EIO_STATVFS, path, pri, cb, data);
1793} 1834}
1794 1835
1795eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data) 1836eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
1796{ 1837{
1797 return eio__1path (EIO_UNLINK, path, pri, cb, data); 1838 return eio__1path (EIO_UNLINK, path, pri, cb, data);

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