BuildSystem/Windows: * Added 5.1.50 (GA) MySQL client sources for crosscompiling (or lazy) windows people.
* Added an option to autosearch for your own installed MySQL as before. Note that default setting is to use the internal MySQL. * You can now build 32-bit even if your MySQL is x64 and vice versa. * Recommended MySQL server version for use with provided MySQL client sources is 5.1.x. * If your server version is different, let CMake autofind and use it instead (check EXTERNAL_MYSQL option) --HG-- branch : trunk
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/* Copyright (C) 2003 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 "mysys_err.h"
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#include <errno.h>
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/*
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Sync data in file to disk
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SYNOPSIS
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my_sync()
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fd File descritor to sync
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my_flags Flags (now only MY_WME is supported)
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NOTE
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If file system supports its, only file data is synced, not inode data.
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MY_IGNORE_BADFD is useful when fd is "volatile" - not protected by a
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mutex. In this case by the time of fsync(), fd may be already closed by
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another thread, or even reassigned to a different file. With this flag -
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MY_IGNORE_BADFD - such a situation will not be considered an error.
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(which is correct behaviour, if we know that the other thread synced the
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file before closing)
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RETURN
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0 ok
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-1 error
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*/
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int my_sync(File fd, myf my_flags)
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{
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int res;
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DBUG_ENTER("my_sync");
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DBUG_PRINT("my",("Fd: %d my_flags: %d", fd, my_flags));
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do
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{
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#if defined(F_FULLFSYNC)
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/*
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In Mac OS X >= 10.3 this call is safer than fsync() (it forces the
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disk's cache and guarantees ordered writes).
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*/
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if (!(res= fcntl(fd, F_FULLFSYNC, 0)))
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break; /* ok */
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/* Some file systems don't support F_FULLFSYNC and fail above: */
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DBUG_PRINT("info",("fcntl(F_FULLFSYNC) failed, falling back"));
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#endif
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#if defined(HAVE_FDATASYNC)
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res= fdatasync(fd);
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#elif defined(HAVE_FSYNC)
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res= fsync(fd);
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#elif defined(__WIN__)
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res= _commit(fd);
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#else
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#error Cannot find a way to sync a file, durability in danger
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res= 0; /* No sync (strange OS) */
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#endif
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} while (res == -1 && errno == EINTR);
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if (res)
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{
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int er= errno;
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if (!(my_errno= er))
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my_errno= -1; /* Unknown error */
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if ((my_flags & MY_IGNORE_BADFD) &&
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(er == EBADF || er == EINVAL || er == EROFS))
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{
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DBUG_PRINT("info", ("ignoring errno %d", er));
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res= 0;
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}
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else if (my_flags & MY_WME)
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my_error(EE_SYNC, MYF(ME_BELL+ME_WAITTANG), my_filename(fd), my_errno);
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}
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DBUG_RETURN(res);
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} /* my_sync */
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static const char cur_dir_name[]= {FN_CURLIB, 0};
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/*
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Force directory information to disk.
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SYNOPSIS
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my_sync_dir()
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dir_name the name of the directory
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my_flags flags (MY_WME etc)
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RETURN
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0 if ok, !=0 if error
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*/
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int my_sync_dir(const char *dir_name, myf my_flags)
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{
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#ifdef NEED_EXPLICIT_SYNC_DIR
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File dir_fd;
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int res= 0;
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const char *correct_dir_name;
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DBUG_ENTER("my_sync_dir");
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DBUG_PRINT("my",("Dir: '%s' my_flags: %d", dir_name, my_flags));
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/* Sometimes the path does not contain an explicit directory */
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correct_dir_name= (dir_name[0] == 0) ? cur_dir_name : dir_name;
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/*
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Syncing a dir may give EINVAL on tmpfs on Linux, which is ok.
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EIO on the other hand is very important. Hence MY_IGNORE_BADFD.
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*/
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if ((dir_fd= my_open(correct_dir_name, O_RDONLY, MYF(my_flags))) >= 0)
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{
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if (my_sync(dir_fd, MYF(my_flags | MY_IGNORE_BADFD)))
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res= 2;
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if (my_close(dir_fd, MYF(my_flags)))
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res= 3;
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}
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else
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res= 1;
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DBUG_RETURN(res);
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#else
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return 0;
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#endif
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}
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/*
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Force directory information to disk.
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SYNOPSIS
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my_sync_dir_by_file()
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file_name the name of a file in the directory
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my_flags flags (MY_WME etc)
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RETURN
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0 if ok, !=0 if error
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*/
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int my_sync_dir_by_file(const char *file_name, myf my_flags)
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{
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#ifdef NEED_EXPLICIT_SYNC_DIR
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char dir_name[FN_REFLEN];
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size_t dir_name_length;
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dirname_part(dir_name, file_name, &dir_name_length);
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return my_sync_dir(dir_name, my_flags);
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#else
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return 0;
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#endif
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}
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