diff options
Diffstat (limited to 'mysql/mysys/my_file.c')
| -rw-r--r-- | mysql/mysys/my_file.c | 144 |
1 files changed, 0 insertions, 144 deletions
diff --git a/mysql/mysys/my_file.c b/mysql/mysys/my_file.c deleted file mode 100644 index b2faed0..0000000 --- a/mysql/mysys/my_file.c +++ /dev/null @@ -1,144 +0,0 @@ -/* Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved. - - 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ - -#include "mysys_priv.h" -#include "my_static.h" -#include <m_string.h> -#ifdef HAVE_SYS_RESOURCE_H -#include <sys/resource.h> /* RLIMIT_NOFILE */ -#endif - -/* - set how many open files we want to be able to handle - - SYNOPSIS - set_maximum_open_files() - max_file_limit Files to open - - NOTES - The request may not fulfilled becasue of system limitations - - RETURN - Files available to open. - May be more or less than max_file_limit! -*/ - -#if defined(HAVE_GETRLIMIT) - -/* - This value is certainly wrong on all 64bit platforms, - and also wrong on many 32bit platforms. - It is better to get a compile error, than to use a wrong value. -#ifndef RLIM_INFINITY -#define RLIM_INFINITY ((uint) 0xffffffff) -#endif -*/ - -static uint set_max_open_files(uint max_file_limit) -{ - struct rlimit rlimit; - uint old_cur; - DBUG_ENTER("set_max_open_files"); - DBUG_PRINT("enter",("files: %u", max_file_limit)); - - if (!getrlimit(RLIMIT_NOFILE,&rlimit)) - { - old_cur= (uint) rlimit.rlim_cur; - DBUG_PRINT("info", ("rlim_cur: %u rlim_max: %u", - (uint) rlimit.rlim_cur, - (uint) rlimit.rlim_max)); - if (rlimit.rlim_cur == (rlim_t) RLIM_INFINITY) - rlimit.rlim_cur = max_file_limit; - if (rlimit.rlim_cur >= max_file_limit) - DBUG_RETURN(rlimit.rlim_cur); /* purecov: inspected */ - rlimit.rlim_cur= rlimit.rlim_max= max_file_limit; - if (setrlimit(RLIMIT_NOFILE, &rlimit)) - max_file_limit= old_cur; /* Use original value */ - else - { - rlimit.rlim_cur= 0; /* Safety if next call fails */ - (void) getrlimit(RLIMIT_NOFILE,&rlimit); - DBUG_PRINT("info", ("rlim_cur: %u", (uint) rlimit.rlim_cur)); - if (rlimit.rlim_cur) /* If call didn't fail */ - max_file_limit= (uint) rlimit.rlim_cur; - } - } - DBUG_PRINT("exit",("max_file_limit: %u", max_file_limit)); - DBUG_RETURN(max_file_limit); -} - -#else -static uint set_max_open_files(uint max_file_limit) -{ - /* We don't know the limit. Return best guess */ - return MY_MIN(max_file_limit, OS_FILE_LIMIT); -} -#endif - - -/* - Change number of open files - - SYNOPSIS: - my_set_max_open_files() - files Number of requested files - - RETURN - number of files available for open -*/ - -uint my_set_max_open_files(uint files) -{ - struct st_my_file_info *tmp; - DBUG_ENTER("my_set_max_open_files"); - DBUG_PRINT("enter",("files: %u my_file_limit: %u", files, my_file_limit)); - - files+= MY_FILE_MIN; - files= set_max_open_files(MY_MIN(files, OS_FILE_LIMIT)); - if (files <= MY_NFILE) - DBUG_RETURN(files); - - if (!(tmp= (struct st_my_file_info*) my_malloc(key_memory_my_file_info, - sizeof(*tmp) * files, - MYF(MY_WME)))) - DBUG_RETURN(MY_NFILE); - - /* Copy any initialized files */ - memcpy((char*) tmp, (char*) my_file_info, - sizeof(*tmp) * MY_MIN(my_file_limit, files)); - memset((tmp + my_file_limit), 0, - MY_MAX((int) (files - my_file_limit), 0) * sizeof(*tmp)); - my_free_open_file_info(); /* Free if already allocated */ - my_file_info= tmp; - my_file_limit= files; - DBUG_PRINT("exit",("files: %u", files)); - DBUG_RETURN(files); -} - - -void my_free_open_file_info() -{ - DBUG_ENTER("my_free_file_info"); - if (my_file_info != my_file_info_default) - { - /* Copy data back for my_print_open_files */ - memcpy((char*) my_file_info_default, my_file_info, - sizeof(*my_file_info_default)* MY_NFILE); - my_free(my_file_info); - my_file_info= my_file_info_default; - my_file_limit= MY_NFILE; - } - DBUG_VOID_RETURN; -} |