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/* Copyright (C) 2000 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include "mysys_priv.h"
#include "mysys_err.h"
#include "my_dir.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
/*
Open a file
SYNOPSIS
my_open()
FileName Fully qualified file name
Flags Read | write
MyFlags Special flags
RETURN VALUE
File descriptor
*/
File my_open(const char *FileName, int Flags, myf MyFlags)
/* Path-name of file */
/* Read | write .. */
/* Special flags */
{
File fd;
#if !defined(NO_OPEN_3)
fd = open(FileName, Flags, my_umask); /* Normal unix */
#else
fd = open((char *) FileName, Flags);
#endif
return(my_register_filename(fd, FileName, FILE_BY_OPEN,
EE_FILENOTFOUND, MyFlags));
} /* my_open */
/*
Close a file
SYNOPSIS
my_close()
fd File sescriptor
myf Special Flags
*/
int my_close(File fd, myf MyFlags)
{
int err;
pthread_mutex_lock(&THR_LOCK_open);
do
{
err= close(fd);
} while (err == -1 && errno == EINTR);
if (err)
{
my_errno=errno;
if (MyFlags & (MY_FAE | MY_WME))
my_error(EE_BADCLOSE, MYF(ME_BELL+ME_WAITTANG),my_filename(fd),errno);
}
if ((uint) fd < my_file_limit && my_file_info[fd].type != UNOPEN)
{
free(my_file_info[fd].name);
#if !defined(HAVE_PREAD)
pthread_mutex_destroy(&my_file_info[fd].mutex);
#endif
my_file_info[fd].type = UNOPEN;
}
my_file_opened--;
pthread_mutex_unlock(&THR_LOCK_open);
return(err);
} /* my_close */
/*
Register file in my_file_info[]
SYNOPSIS
my_register_filename()
fd File number opened, -1 if error on open
FileName File name
type_file_type How file was created
error_message_number Error message number if caller got error (fd == -1)
MyFlags Flags for my_close()
RETURN
-1 error
# Filenumber
*/
File my_register_filename(File fd, const char *FileName, enum file_type
type_of_file, uint32_t error_message_number, myf MyFlags)
{
if ((int) fd >= 0)
{
if ((uint) fd >= my_file_limit)
{
#if !defined(HAVE_PREAD)
my_errno= EMFILE;
#else
thread_safe_increment(my_file_opened,&THR_LOCK_open);
return(fd); /* safeguard */
#endif
}
else
{
pthread_mutex_lock(&THR_LOCK_open);
if ((my_file_info[fd].name = (char*) strdup(FileName)))
{
my_file_opened++;
my_file_total_opened++;
my_file_info[fd].type = type_of_file;
#if !defined(HAVE_PREAD)
pthread_mutex_init(&my_file_info[fd].mutex,MY_MUTEX_INIT_FAST);
#endif
pthread_mutex_unlock(&THR_LOCK_open);
return(fd);
}
pthread_mutex_unlock(&THR_LOCK_open);
my_errno= ENOMEM;
}
(void) my_close(fd, MyFlags);
}
else
my_errno= errno;
if (MyFlags & (MY_FFNF | MY_FAE | MY_WME))
{
if (my_errno == EMFILE)
error_message_number= EE_OUT_OF_FILERESOURCES;
my_error(error_message_number, MYF(ME_BELL+ME_WAITTANG),
FileName, my_errno);
}
return(-1);
}
#ifdef EXTRA_DEBUG
void my_print_open_files(void)
{
if (my_file_opened | my_stream_opened)
{
uint32_t i;
for (i= 0 ; i < my_file_limit ; i++)
{
if (my_file_info[i].type != UNOPEN)
{
fprintf(stderr, EE(EE_FILE_NOT_CLOSED), my_file_info[i].name, i);
fputc('\n', stderr);
}
}
}
}
#endif
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