my_os2file64.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:12k
- /* Copyright (C) Yuri Dario & 2000 MySQL AB
- All the above parties has a full, independent copyright to
- the following code, including the right to use the code in
- any manner without any demands from the other parties.
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- MA 02111-1307, USA */
- void _OS2errno( APIRET rc);
- longlong _lseek64( int fd, longlong offset, int seektype);
- int _lock64( int fd, int locktype, my_off_t start,
- my_off_t length, myf MyFlags);
- int _sopen64( const char *name, int oflag, int shflag, int mask);
- /*
- This class is used to define a global c++ variable, that
- is initialized before main() gets called.
- */
- class File64bit
- {
- public:
- File64bit(); /* default constructor */
- } initFile64bit;
- static APIRET (* APIENTRY _DosOpenL)(PCSZ pszFileName,
- PHFILE phf,
- PULONG pulAction,
- LONGLONG cbFile,
- ULONG ulAttribute,
- ULONG fsOpenFlags,
- ULONG fsOpenMode,
- PEAOP2 peaop2);
- static APIRET (* APIENTRY _DosSetFilePtrL)(HFILE hFile,
- LONGLONG ib,
- ULONG method,
- PLONGLONG ibActual);
- static APIRET (* APIENTRY _DosSetFileLocksL)(HFILE hFile,
- PFILELOCKL pflUnlock,
- PFILELOCKL pflLock,
- ULONG timeout,
- ULONG flags);
- #define EIO EINVAL
- #define ESPIPE EBADSEEK
- static unsigned char const errno_tab[] =
- {
- 0 , EINVAL, ENOENT, ENOENT, EMFILE, /* 0..4 */
- EACCES, EBADF, EIO, ENOMEM, EIO, /* 5..9 */
- EINVAL, ENOEXEC,EINVAL, EINVAL, EINVAL, /* 10..14 */
- ENOENT, EBUSY, EXDEV, ENOENT, EROFS, /* 15..19 */
- EIO, EIO, EIO, EIO, EIO, /* 20..24 */
- EIO, EIO, EIO, ENOSPC, EIO, /* 25..29 */
- EIO, EIO, EACCES, EACCES, EIO, /* 30..34 */
- EIO, EIO, EIO, EIO, ENOSPC, /* 35..39 */
- EIO, EIO, EIO, EIO, EIO, /* 40..44 */
- EIO, EIO, EIO, EIO, EIO, /* 45..49 */
- EIO, EIO, EIO, EIO, EBUSY, /* 50..54 */
- EIO, EIO, EIO, EIO, EIO, /* 55..59 */
- EIO, ENOSPC, ENOSPC, EIO, EIO, /* 60..64 */
- EACCES, EIO, EIO, EIO, EIO, /* 65..69 */
- EIO, EIO, EIO, EROFS, EIO, /* 70..74 */
- EIO, EIO, EIO, EIO, EIO, /* 75..79 */
- EEXIST, EIO, ENOENT, EIO, EIO, /* 80..84 */
- EIO, EIO, EINVAL, EIO, EAGAIN, /* 85..89 */
- EIO, EIO, EIO, EIO, EIO, /* 90..94 */
- EINTR, EIO, EIO, EIO, EACCES, /* 95..99 */
- ENOMEM, EINVAL, EINVAL, ENOMEM, EINVAL, /* 100..104 */
- EINVAL, ENOMEM, EIO, EACCES, EPIPE, /* 105..109 */
- ENOENT, E2BIG, ENOSPC, ENOMEM, EBADF, /* 110..114 */
- EINVAL, EINVAL, EINVAL, EINVAL, EINVAL, /* 115..119 */
- EINVAL, EINVAL, EINVAL, ENOENT, EINVAL, /* 120..124 */
- ENOENT, ENOENT, ENOENT, ECHILD, ECHILD, /* 125..129 */
- EACCES, EINVAL, ESPIPE, EINVAL, EINVAL, /* 130..134 */
- EINVAL, EINVAL, EINVAL, EINVAL, EINVAL, /* 135..139 */
- EINVAL, EINVAL, EBUSY, EINVAL, EINVAL, /* 140..144 */
- EINVAL, EINVAL, EINVAL, EBUSY, EINVAL, /* 145..149 */
- EINVAL, EINVAL, ENOMEM, EINVAL, EINVAL, /* 150..154 */
- EINVAL, EINVAL, EINVAL, EINVAL, EINVAL, /* 155..159 */
- EINVAL, EINVAL, EINVAL, EINVAL, EAGAIN, /* 160..164 */
- EINVAL, EINVAL, EACCES, EINVAL, EINVAL, /* 165..169 */
- EBUSY, EINVAL, EINVAL, EINVAL, EINVAL, /* 170..174 */
- EINVAL, EINVAL, EINVAL, EINVAL, EINVAL, /* 175..179 */
- EINVAL, EINVAL, EINVAL, EINVAL, ECHILD, /* 180..184 */
- EINVAL, EINVAL, ENOENT, EINVAL, EINVAL, /* 185..189 */
- ENOEXEC,ENOEXEC,ENOEXEC,ENOEXEC,ENOEXEC, /* 190..194 */
- ENOEXEC,ENOEXEC,ENOEXEC,ENOEXEC,ENOEXEC, /* 195..199 */
- ENOEXEC,ENOEXEC,ENOEXEC,ENOENT, EINVAL, /* 200..204 */
- EINVAL, ENAMETOOLONG, EINVAL, EINVAL, EINVAL, /* 205..209 */
- EINVAL, EINVAL, EACCES, ENOEXEC,ENOEXEC, /* 210..214 */
- EINVAL, EINVAL, EINVAL, EINVAL, EINVAL, /* 215..219 */
- EINVAL, EINVAL, EINVAL, EINVAL, EINVAL, /* 220..224 */
- EINVAL, EINVAL, EINVAL, ECHILD, EINVAL, /* 225..229 */
- EINVAL, EBUSY, EAGAIN, ENOTCONN, EINVAL, /* 230..234 */
- EINVAL, EINVAL, EINVAL, EINVAL, EINVAL, /* 235..239 */
- EINVAL, EINVAL, EINVAL, EINVAL, EINVAL, /* 240..244 */
- EINVAL, EINVAL, EINVAL, EINVAL, EINVAL, /* 245..249 */
- EACCES, EACCES, EINVAL, ENOENT, EINVAL, /* 250..254 */
- EINVAL, EINVAL, EINVAL, EINVAL, EINVAL, /* 255..259 */
- EINVAL, EINVAL, EINVAL, EINVAL, EINVAL, /* 260..264 */
- EINVAL, EINVAL, EINVAL, EINVAL, EINVAL, /* 265..269 */
- EINVAL, EINVAL, EINVAL, EINVAL, EINVAL, /* 270..274 */
- EINVAL, EINVAL, EINVAL, EINVAL, EINVAL, /* 275..279 */
- EINVAL, EINVAL, EINVAL, EINVAL, EEXIST, /* 280..284 */
- EEXIST, EINVAL, EINVAL, EINVAL, EINVAL, /* 285..289 */
- ENOMEM, EMFILE, EINVAL, EINVAL, EINVAL, /* 290..294 */
- EINVAL, EINVAL, EINVAL, EINVAL, EINVAL, /* 295..299 */
- EINVAL, EBUSY, EINVAL, ESRCH, EINVAL, /* 300..304 */
- ESRCH, EINVAL, EINVAL, EINVAL, ESRCH, /* 305..309 */
- EINVAL, ENOMEM, EINVAL, EINVAL, EINVAL, /* 310..314 */
- EINVAL, E2BIG, ENOENT, EIO, EIO, /* 315..319 */
- EINVAL, EINVAL, EINVAL, EINVAL, EAGAIN, /* 320..324 */
- EINVAL, EINVAL, EINVAL, EIO, ENOENT, /* 325..329 */
- EACCES, EACCES, EACCES, ENOENT, ENOMEM /* 330..334 */
- };
- /*
- * Initialize 64bit file access: dynamic load of WSeB API
- */
- File64bit :: File64bit()
- {
- HMODULE hDoscalls;
- if (DosQueryModuleHandle("DOSCALLS", &hDoscalls) != NO_ERROR)
- return;
- if (DosQueryProcAddr(hDoscalls, 981, NULL, (PFN *)&_DosOpenL) != NO_ERROR)
- return;
- if (DosQueryProcAddr(hDoscalls, 988, NULL, (PFN *)&_DosSetFilePtrL) != NO_ERROR) {
- _DosOpenL = NULL;
- return;
- }
- if (DosQueryProcAddr(hDoscalls, 986, NULL, (PFN *)&_DosSetFileLocksL) != NO_ERROR) {
- _DosOpenL = NULL;
- _DosSetFilePtrL = NULL;
- return;
- }
- /* notify success */
- #ifdef MYSQL_SERVER
- printf( "WSeB 64bit file API loaded.n");
- #endif
- }
- void _OS2errno( APIRET rc)
- {
- if (rc >= sizeof (errno_tab))
- errno = EINVAL;
- else
- errno = errno_tab[rc];
- }
- longlong _lseek64( int fd, longlong offset, int seektype)
- {
- APIRET rc;
- longlong actual;
- if (_DosSetFilePtrL)
- rc = _DosSetFilePtrL( fd, offset, seektype, &actual);
- else
- {
- ULONG ulActual;
- rc = DosSetFilePtr( fd, (long) offset, seektype, &ulActual);
- actual = ulActual;
- }
- if (!rc)
- return( actual); /* NO_ERROR */
- _OS2errno( rc); /* set errno */
- return(-1); /* seek failed */
- }
- inline APIRET _SetFileLocksL(HFILE hFile,
- PFILELOCKL pflUnlock,
- PFILELOCKL pflLock,
- ULONG timeout,
- ULONG flags)
- {
- if (_DosSetFileLocksL)
- {
- APIRET rc;
- rc = _DosSetFileLocksL( hFile, pflUnlock, pflLock, timeout, flags);
- /*
- on FAT/HPFS/LAN a INVALID_PARAMETER is returned, seems that
- only JFS can handle >2GB ranges.
- */
- if (rc != 87)
- return rc;
- /* got INVALID_PARAMETER, fallback to standard call */
- }
- FILELOCK flUnlock = { pflUnlock->lOffset, pflUnlock->lRange };
- FILELOCK flLock = { pflLock->lOffset, pflLock->lRange };
- return DosSetFileLocks( hFile, &flUnlock, &flLock, timeout, flags);
- }
- int _lock64( int fd, int locktype, my_off_t start,
- my_off_t length, myf MyFlags)
- {
- FILELOCKL LockArea = {0,0}, UnlockArea = {0,0};
- ULONG readonly = 0;
- APIRET rc = -1;
- switch (locktype) {
- case F_UNLCK:
- UnlockArea.lOffset = start;
- UnlockArea.lRange = length ? length : LONGLONG_MAX;
- break;
- case F_RDLCK:
- case F_WRLCK:
- LockArea.lOffset = start;
- LockArea.lRange = length ? length : LONGLONG_MAX;
- readonly = (locktype == F_RDLCK ? 1 : 0);
- break;
- default:
- errno = EINVAL;
- rc = -1;
- break;
- }
- if (MyFlags & MY_DONT_WAIT)
- {
- rc = _SetFileLocksL( fd, &UnlockArea, &LockArea, 0, readonly);
- /* printf("fd %d, locktype %d, rc %d (dont_wait)n", fd, locktype, rc); */
- if (rc == 33) { /* Lock Violation */
- DBUG_PRINT("info",("Was locked, trying with timeout"));
- rc = _SetFileLocksL( fd, &UnlockArea, &LockArea, 1 * 1000, readonly);
- /* printf( "fd %d, locktype %d, rc %d (dont_wait with timeout)n", fd, locktype, rc); */
- }
- }
- else
- {
- while (rc = _SetFileLocksL( fd, &UnlockArea, &LockArea, 0, readonly) &&
- (rc == 33))
- {
- printf(".");
- DosSleep(1 * 1000);
- }
- /* printf( "fd %d, locktype %d, rc %d (wait2)n", fd, locktype, rc); */
- }
- if (!rc)
- return(0); /* NO_ERROR */
- _OS2errno( rc); /* set errno */
- return(-1); /* lock failed */
- }
- int sopen(const char *name, int oflag, int shflag, int mask)
- {
- int fail_errno;
- APIRET rc = 0;
- HFILE hf = 0;
- ULONG ulAction = 0;
- LONGLONG cbFile = 0;
- ULONG ulAttribute = FILE_NORMAL;
- ULONG fsOpenFlags = 0;
- ULONG fsOpenMode = 0;
- /* Extract the access mode and sharing mode bits. */
- fsOpenMode = (shflag & 0xFF) | (oflag & 0x03);
- /*
- Translate ERROR_OPEN_FAILED to ENOENT unless O_EXCL is set (see
- below).
- */
- fail_errno = ENOENT;
- /*
- Compute `open_flag' depending on `flags'. Note that _SO_CREAT is
- set for O_CREAT.
- */
- if (oflag & O_CREAT)
- {
- if (oflag & O_EXCL)
- {
- fsOpenFlags = OPEN_ACTION_FAIL_IF_EXISTS | OPEN_ACTION_CREATE_IF_NEW;
- fail_errno = EEXIST;
- }
- else if (oflag & O_TRUNC)
- fsOpenFlags = OPEN_ACTION_REPLACE_IF_EXISTS | OPEN_ACTION_CREATE_IF_NEW;
- else
- fsOpenFlags = OPEN_ACTION_OPEN_IF_EXISTS | OPEN_ACTION_CREATE_IF_NEW;
- if (mask & S_IWRITE)
- ulAttribute = FILE_NORMAL;
- else
- ulAttribute = FILE_READONLY;
- }
- else if (oflag & O_TRUNC)
- fsOpenFlags = OPEN_ACTION_REPLACE_IF_EXISTS | OPEN_ACTION_FAIL_IF_NEW;
- else
- fsOpenFlags = OPEN_ACTION_OPEN_IF_EXISTS | OPEN_ACTION_FAIL_IF_NEW;
- /* Try to open the file and handle errors. */
- if (_DosOpenL)
- rc = _DosOpenL( name, &hf, &ulAction, cbFile,
- ulAttribute, fsOpenFlags, fsOpenMode, NULL);
- else
- rc = DosOpen( name, &hf, &ulAction, (LONG) cbFile,
- ulAttribute, fsOpenFlags, fsOpenMode, NULL);
- if (rc == ERROR_OPEN_FAILED)
- {
- errno = fail_errno;
- return -1;
- }
- if (rc != 0)
- {
- _OS2errno( rc); /* set errno */
- return -1;
- }
- if (oflag & O_APPEND)
- _lseek64( hf, 0L, SEEK_END);
- return hf;
- }
- int read(int fd, void *buffer, unsigned int count)
- {
- APIRET rc;
- ULONG actual;
- rc= DosRead( fd, (PVOID) buffer, count, &actual);
- if (!rc)
- return( actual); /* NO_ERROR */
- _OS2errno( rc); /* set errno */
- return(-1); /* read failed */
- }
- int write(int fd, const void *buffer, unsigned int count)
- {
- APIRET rc;
- ULONG actual;
- rc = DosWrite( fd, (PVOID) buffer, count, &actual);
- if (!rc)
- return( actual); /* NO_ERROR */
- _OS2errno( rc); /* set errno */
- return(-1); /* write failed */
- }
- int close( int fd)
- {
- APIRET rc;
- ULONG actual;
- rc = DosClose( fd);
- if (!rc)
- return( 0); /* NO_ERROR */
- _OS2errno( rc); /* set errno */
- return(-1); /* close failed */
- }
- int open( const char *name, int oflag)
- {
- return sopen( name, oflag, OPEN_SHARE_DENYNONE, S_IREAD | S_IWRITE);
- }
- int open( const char *name, int oflag, int mask)
- {
- return sopen( name, oflag, OPEN_SHARE_DENYNONE, mask);
- }