mirror of
https://github.com/VCMP-SqMod/SqMod.git
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127 lines
3.8 KiB
C
127 lines
3.8 KiB
C
/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02111-1301, USA */
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#define USES_TYPES
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#include "mysys_priv.h"
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#include "mysys_err.h"
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#include <my_dir.h>
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#include <errno.h>
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#if defined(MSDOS) || defined(_WIN32) || defined(__EMX__) || defined(OS2)
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#include <share.h>
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#endif
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/* Open a file */
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File my_open(const char *FileName, int Flags, myf MyFlags)
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/* Path-name of file */
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/* Read | write .. */
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/* Special flags */
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{
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File fd;
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DBUG_ENTER("my_open");
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DBUG_PRINT("my",("Name: '%s' Flags: %d MyFlags: %d",
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FileName, Flags, MyFlags));
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#if defined(MSDOS) || defined(_WIN32) || defined(__EMX__) || defined(OS2)
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if (Flags & O_SHARE)
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fd = sopen((my_string) FileName, (Flags & ~O_SHARE) | O_BINARY, SH_DENYNO,
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MY_S_IREAD | MY_S_IWRITE);
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else
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fd = open((my_string) FileName, Flags | O_BINARY,
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MY_S_IREAD | MY_S_IWRITE);
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#elif !defined(NO_OPEN_3)
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fd = open(FileName, Flags, my_umask); /* Normal unix */
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#else
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fd = open((my_string) FileName, Flags);
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#endif
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DBUG_RETURN(my_register_filename(fd, FileName, FILE_BY_OPEN,
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EE_FILENOTFOUND, MyFlags));
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} /* my_open */
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/* Close a file */
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int my_close(File fd, myf MyFlags)
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{
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int err;
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DBUG_ENTER("my_close");
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DBUG_PRINT("my",("fd: %d MyFlags: %d",fd, MyFlags));
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pthread_mutex_lock(&THR_LOCK_open);
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if ((err = close(fd)))
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{
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DBUG_PRINT("error",("Got error %d on close",err));
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my_errno=errno;
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if (MyFlags & (MY_FAE | MY_WME))
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my_error(EE_BADCLOSE, MYF(ME_BELL+ME_WAITTANG),my_filename(fd),errno);
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}
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if ((uint) fd < MY_NFILE && my_file_info[fd].type != UNOPEN)
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{
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my_free(my_file_info[fd].name);
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#if defined(THREAD) && !defined(HAVE_PREAD)
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pthread_mutex_destroy(&my_file_info[fd].mutex);
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#endif
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my_file_info[fd].type = UNOPEN;
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}
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my_file_opened--;
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pthread_mutex_unlock(&THR_LOCK_open);
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DBUG_RETURN(err);
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} /* my_close */
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File my_register_filename(File fd, const char *FileName, enum file_type
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type_of_file, uint error_message_number, myf MyFlags)
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{
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if ((int) fd >= 0)
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{
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if ((int) fd >= MY_NFILE)
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{
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#if defined(THREAD) && !defined(HAVE_PREAD)
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(void) my_close(fd,MyFlags);
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my_errno=EMFILE;
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if (MyFlags & (MY_FFNF | MY_FAE | MY_WME))
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my_error(EE_OUT_OF_FILERESOURCES, MYF(ME_BELL+ME_WAITTANG),
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FileName, my_errno);
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return(-1);
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#endif
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thread_safe_increment(my_file_opened,&THR_LOCK_open);
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return(fd); /* safeguard */
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}
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pthread_mutex_lock(&THR_LOCK_open);
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if ((my_file_info[fd].name = (char*) my_strdup(FileName,MyFlags)))
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{
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my_file_opened++;
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my_file_info[fd].type = type_of_file;
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#if defined(THREAD) && !defined(HAVE_PREAD)
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pthread_mutex_init(&my_file_info[fd].mutex,MY_MUTEX_INIT_FAST);
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#endif
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pthread_mutex_unlock(&THR_LOCK_open);
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DBUG_PRINT("exit",("fd: %d",fd));
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return(fd);
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}
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pthread_mutex_unlock(&THR_LOCK_open);
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(void) my_close(fd, MyFlags);
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my_errno=ENOMEM;
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}
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else
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my_errno=errno;
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DBUG_PRINT("error",("Got error %d on open",my_errno));
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if (MyFlags & (MY_FFNF | MY_FAE | MY_WME))
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my_error(error_message_number, MYF(ME_BELL+ME_WAITTANG),
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FileName, my_errno);
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return(fd);
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}
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