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4171483b53
The patch replaces the use of the POSIX I/O interfaces in mysys on Windows with the Win32 API calls (CreateFile, WriteFile, etc). The Windows HANDLE for the open file is stored in the my_file_info struct, along with a flag for append mode (because the Windows API does not support opening files in append mode in all cases) The default max open files has been increased to 16384 and can be increased further by setting --max-open-files=<value> during the server start. Noteworthy benefit of this patch is that it removes limits from the table_cache size - allowing for more simultaneus users
123 lines
4.9 KiB
C
123 lines
4.9 KiB
C
/* Copyright (C) 2008 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/*
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Convert Windows API error (GetLastError() to Posix equivalent (errno)
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The exported function my_osmaperr() is modelled after and borrows
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heavily from undocumented _dosmaperr()(found of the static Microsoft C runtime).
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*/
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#include <my_global.h>
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#include <my_sys.h>
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struct errentry
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{
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unsigned long oscode; /* OS return value */
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int sysv_errno; /* System V error code */
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};
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static struct errentry errtable[]= {
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{ ERROR_INVALID_FUNCTION, EINVAL }, /* 1 */
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{ ERROR_FILE_NOT_FOUND, ENOENT }, /* 2 */
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{ ERROR_PATH_NOT_FOUND, ENOENT }, /* 3 */
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{ ERROR_TOO_MANY_OPEN_FILES, EMFILE }, /* 4 */
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{ ERROR_ACCESS_DENIED, EACCES }, /* 5 */
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{ ERROR_INVALID_HANDLE, EBADF }, /* 6 */
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{ ERROR_ARENA_TRASHED, ENOMEM }, /* 7 */
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{ ERROR_NOT_ENOUGH_MEMORY, ENOMEM }, /* 8 */
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{ ERROR_INVALID_BLOCK, ENOMEM }, /* 9 */
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{ ERROR_BAD_ENVIRONMENT, E2BIG }, /* 10 */
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{ ERROR_BAD_FORMAT, ENOEXEC }, /* 11 */
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{ ERROR_INVALID_ACCESS, EINVAL }, /* 12 */
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{ ERROR_INVALID_DATA, EINVAL }, /* 13 */
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{ ERROR_INVALID_DRIVE, ENOENT }, /* 15 */
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{ ERROR_CURRENT_DIRECTORY, EACCES }, /* 16 */
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{ ERROR_NOT_SAME_DEVICE, EXDEV }, /* 17 */
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{ ERROR_NO_MORE_FILES, ENOENT }, /* 18 */
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{ ERROR_LOCK_VIOLATION, EACCES }, /* 33 */
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{ ERROR_BAD_NETPATH, ENOENT }, /* 53 */
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{ ERROR_NETWORK_ACCESS_DENIED, EACCES }, /* 65 */
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{ ERROR_BAD_NET_NAME, ENOENT }, /* 67 */
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{ ERROR_FILE_EXISTS, EEXIST }, /* 80 */
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{ ERROR_CANNOT_MAKE, EACCES }, /* 82 */
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{ ERROR_FAIL_I24, EACCES }, /* 83 */
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{ ERROR_INVALID_PARAMETER, EINVAL }, /* 87 */
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{ ERROR_NO_PROC_SLOTS, EAGAIN }, /* 89 */
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{ ERROR_DRIVE_LOCKED, EACCES }, /* 108 */
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{ ERROR_BROKEN_PIPE, EPIPE }, /* 109 */
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{ ERROR_DISK_FULL, ENOSPC }, /* 112 */
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{ ERROR_INVALID_TARGET_HANDLE, EBADF }, /* 114 */
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{ ERROR_INVALID_HANDLE, EINVAL }, /* 124 */
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{ ERROR_WAIT_NO_CHILDREN, ECHILD }, /* 128 */
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{ ERROR_CHILD_NOT_COMPLETE, ECHILD }, /* 129 */
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{ ERROR_DIRECT_ACCESS_HANDLE, EBADF }, /* 130 */
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{ ERROR_NEGATIVE_SEEK, EINVAL }, /* 131 */
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{ ERROR_SEEK_ON_DEVICE, EACCES }, /* 132 */
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{ ERROR_DIR_NOT_EMPTY, ENOTEMPTY }, /* 145 */
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{ ERROR_NOT_LOCKED, EACCES }, /* 158 */
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{ ERROR_BAD_PATHNAME, ENOENT }, /* 161 */
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{ ERROR_MAX_THRDS_REACHED, EAGAIN }, /* 164 */
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{ ERROR_LOCK_FAILED, EACCES }, /* 167 */
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{ ERROR_ALREADY_EXISTS, EEXIST }, /* 183 */
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{ ERROR_FILENAME_EXCED_RANGE, ENOENT }, /* 206 */
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{ ERROR_NESTING_NOT_ALLOWED, EAGAIN }, /* 215 */
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{ ERROR_NOT_ENOUGH_QUOTA, ENOMEM } /* 1816 */
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};
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/* size of the table */
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#define ERRTABLESIZE (sizeof(errtable)/sizeof(errtable[0]))
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/* The following two constants must be the minimum and maximum
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values in the (contiguous) range of Exec Failure errors. */
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#define MIN_EXEC_ERROR ERROR_INVALID_STARTING_CODESEG
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#define MAX_EXEC_ERROR ERROR_INFLOOP_IN_RELOC_CHAIN
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/* These are the low and high value in the range of errors that are
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access violations */
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#define MIN_EACCES_RANGE ERROR_WRITE_PROTECT
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#define MAX_EACCES_RANGE ERROR_SHARING_BUFFER_EXCEEDED
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static int get_errno_from_oserr(unsigned long oserrno)
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{
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int i;
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/* check the table for the OS error code */
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for (i= 0; i < ERRTABLESIZE; ++i)
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{
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if (oserrno == errtable[i].oscode)
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{
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return errtable[i].sysv_errno;
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}
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}
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/* The error code wasn't in the table. We check for a range of */
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/* EACCES errors or exec failure errors (ENOEXEC). Otherwise */
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/* EINVAL is returned. */
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if (oserrno >= MIN_EACCES_RANGE && oserrno <= MAX_EACCES_RANGE)
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return EACCES;
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else if (oserrno >= MIN_EXEC_ERROR && oserrno <= MAX_EXEC_ERROR)
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return ENOEXEC;
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else
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return EINVAL;
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}
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/* Set errno corresponsing to GetLastError() value */
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void my_osmaperr ( unsigned long oserrno)
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{
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errno= get_errno_from_oserr(oserrno);
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}
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