mysql_init卡住_mysql_init调用卡住原因分析
/****************************************************************************
Init MySQL structure or allocate one
****************************************************************************/
MYSQL * STDCALL
mysql_init(MYSQL *mysql)
{
if (mysql_server_init(0, NULL, NULL))
return 0;
if (!mysql)
{
if (!(mysql=(MYSQL*) my_malloc(sizeof(*mysql),MYF(MY_WME | MY_ZEROFILL))))
{
set_mysql_error(NULL, CR_OUT_OF_MEMORY, unknown_sqlstate);
return 0;
}
mysql->free_me=1;
}
else
memset(mysql, 0, sizeof(*(mysql)));
mysql->charset=default_client_charset_info;
strmov(mysql->net.sqlstate, not_error_sqlstate);
/*
Only enable LOAD DATA INFILE by default if configured with
--enable-local-infile
*/
#if defined(ENABLED_LOCAL_INFILE) && !defined(MYSQL_SERVER)
mysql->options.client_flag|= CLIENT_LOCAL_FILES;
#endif
#ifdef HAVE_SMEM
mysql->options.shared_memory_base_name= (char*) def_shared_memory_base_name;
#endif
mysql->options.methods_to_use= MYSQL_OPT_GUESS_CONNECTION;
mysql->options.report_data_truncation= TRUE; /* default */
/*
By default we don't reconnect because it could silently corrupt data (after
reconnection you potentially lose table locks, user variables, session
variables (transactions but they are specifically dealt with in
mysql_reconnect()).
This is a change: reconnect was set to 1 by default.
How this change impacts existing apps:
- existing apps which relyed on the default will see a behaviour change;
they will have to set reconnect=1 after mysql_real_connect().
- existing apps which explicitely asked for reconnection (the only way they
could do it was by setting mysql.reconnect to 1 after mysql_real_connect())
will not see a behaviour change.
- existing apps which explicitely asked for no reconnection
(mysql.reconnect=0) will not see a behaviour change.
*/
mysql->reconnect= 0;
mysql->options.secure_auth= TRUE;
return mysql;
}
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