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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
126 lines
4.4 KiB
C
126 lines
4.4 KiB
C
/* Copyright (C) 2000-2008 MySQL AB, 2008-2009 Sun Microsystems, Inc.
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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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/*
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Static variables for mysys library. All definied here for easy making of
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a shared library
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*/
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#include "mysys_priv.h"
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#include "my_static.h"
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#include "my_alarm.h"
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my_bool timed_mutexes= 0;
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/* from my_init */
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char * home_dir=0;
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const char *my_progname= NULL, *my_progname_short= NULL;
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char NEAR curr_dir[FN_REFLEN]= {0},
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NEAR home_dir_buff[FN_REFLEN]= {0};
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ulong my_stream_opened=0,my_file_opened=0, my_tmp_file_created=0;
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ulong my_file_total_opened= 0;
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int NEAR my_umask=0664, NEAR my_umask_dir=0777;
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#ifndef THREAD
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int NEAR my_errno=0;
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#endif
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struct st_my_file_info my_file_info_default[MY_NFILE];
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uint my_file_limit= MY_NFILE;
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struct st_my_file_info *my_file_info= my_file_info_default;
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/* From mf_brkhant */
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int NEAR my_dont_interrupt=0;
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volatile int _my_signals=0;
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struct st_remember _my_sig_remember[MAX_SIGNALS]={{0,0}};
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#ifdef THREAD
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sigset_t my_signals; /* signals blocked by mf_brkhant */
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#endif
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/* from mf_reccache.c */
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ulong my_default_record_cache_size=RECORD_CACHE_SIZE;
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/* from soundex.c */
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/* ABCDEFGHIJKLMNOPQRSTUVWXYZ */
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/* :::::::::::::::::::::::::: */
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const char *soundex_map= "01230120022455012623010202";
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/* from my_malloc */
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USED_MEM* my_once_root_block=0; /* pointer to first block */
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uint my_once_extra=ONCE_ALLOC_INIT; /* Memory to alloc / block */
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/* from my_largepage.c */
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#ifdef HAVE_LARGE_PAGES
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my_bool my_use_large_pages= 0;
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uint my_large_page_size= 0;
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#endif
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/* from safe_malloc */
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uint sf_malloc_prehunc=0, /* If you have problem with core- */
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sf_malloc_endhunc=0, /* dump when malloc-message.... */
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/* set theese to 64 or 128 */
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sf_malloc_quick=0; /* set if no calls to sanity */
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size_t sf_malloc_cur_memory= 0L; /* Current memory usage */
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size_t sf_malloc_max_memory= 0L; /* Maximum memory usage */
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uint sf_malloc_count= 0; /* Number of times NEW() was called */
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uchar *sf_min_adress= (uchar*) ~(unsigned long) 0L,
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*sf_max_adress= (uchar*) 0L;
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/* Root of the linked list of struct st_irem */
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struct st_irem *sf_malloc_root = NULL;
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/* from my_alarm */
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int volatile my_have_got_alarm=0; /* declare variable to reset */
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ulong my_time_to_wait_for_lock=2; /* In seconds */
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/* from errors.c */
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#ifdef SHARED_LIBRARY
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char * NEAR globerrs[GLOBERRS]; /* my_error_messages is here */
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#endif
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void (*my_abort_hook)(int) = (void(*)(int)) exit;
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int (*error_handler_hook)(uint error,const char *str,myf MyFlags)=
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my_message_no_curses;
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int (*fatal_error_handler_hook)(uint error,const char *str,myf MyFlags)=
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my_message_no_curses;
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static const char *proc_info_dummy(void *a __attribute__((unused)),
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const char *b __attribute__((unused)),
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const char *c __attribute__((unused)),
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const char *d __attribute__((unused)),
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const unsigned int e __attribute__((unused)))
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{
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return 0;
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}
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/* this is to be able to call set_thd_proc_info from the C code */
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const char *(*proc_info_hook)(void *, const char *, const char *, const char *,
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const unsigned int)= proc_info_dummy;
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#if defined(ENABLED_DEBUG_SYNC)
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/**
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Global pointer to be set if callback function is defined
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(e.g. in mysqld). See sql/debug_sync.cc.
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*/
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void (*debug_sync_C_callback_ptr)(const char *, size_t);
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#endif /* defined(ENABLED_DEBUG_SYNC) */
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#ifdef __WIN__
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/* from my_getsystime.c */
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ulonglong query_performance_frequency, query_performance_offset;
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#endif
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/* How to disable options */
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my_bool NEAR my_disable_locking=0;
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my_bool NEAR my_disable_sync=0;
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my_bool NEAR my_disable_async_io=0;
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my_bool NEAR my_disable_flush_key_blocks=0;
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my_bool NEAR my_disable_symlinks=0;
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my_bool NEAR mysys_uses_curses=0;
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