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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
76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
/* Copyright (C) 2000 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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#include "mysys_priv.h"
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#include <my_dir.h>
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#include "mysys_err.h"
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#include <errno.h>
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#include <my_sys.h>
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#if defined(_WIN32)
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#include <share.h>
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#endif
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/*
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** Create a new file
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** Arguments:
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** Path-name of file
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** Read | write on file (umask value)
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** Read & Write on open file
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** Special flags
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*/
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File my_create(const char *FileName, int CreateFlags, int access_flags,
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myf MyFlags)
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{
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int fd, rc;
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DBUG_ENTER("my_create");
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DBUG_PRINT("my",("Name: '%s' CreateFlags: %d AccessFlags: %d MyFlags: %d",
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FileName, CreateFlags, access_flags, MyFlags));
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#if !defined(NO_OPEN_3)
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fd= open((char *) FileName, access_flags | O_CREAT,
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CreateFlags ? CreateFlags : my_umask);
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#elif defined(_WIN32)
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fd= my_win_open(FileName, access_flags | O_CREAT);
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#else
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fd= open(FileName, access_flags);
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#endif
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if ((MyFlags & MY_SYNC_DIR) && (fd >=0) &&
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my_sync_dir_by_file(FileName, MyFlags))
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{
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my_close(fd, MyFlags);
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fd= -1;
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}
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rc= my_register_filename(fd, FileName, FILE_BY_CREATE,
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EE_CANTCREATEFILE, MyFlags);
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/*
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my_register_filename() may fail on some platforms even if the call to
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*open() above succeeds. In this case, don't leave the stale file because
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callers assume the file to not exist if my_create() fails, so they don't
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do any cleanups.
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*/
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if (unlikely(fd >= 0 && rc < 0))
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{
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int tmp= my_errno;
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my_close(fd, MyFlags);
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my_delete(FileName, MyFlags);
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my_errno= tmp;
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}
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DBUG_RETURN(rc);
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} /* my_create */
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