~drizzle-trunk/drizzle/development

/* 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA */

/*

  Static variables for mysys library. All definied here for easy making of

  a shared library

*/

#pragma once

#include <signal.h>

#define MIN_KEYBLOCK	(min(IO_SIZE,1024))

#define MAX_KEYBLOCK	8192		/* Max keyblocklength == 8*IO_SIZE */

namespace drizzled

{

namespace internal

{

/*

  Structure that stores information of a allocated memory block

  The data is at &struct_adr+sizeof(ALIGN_SIZE(sizeof(struct irem)))

  The lspecialvalue is at the previous 4 bytes from this, which may not

  necessarily be in the struct if the struct size isn't aligned at a 8 byte

  boundary.

*/

class irem

{

public:

  irem *next;		/* Linked list of structures	   */

  irem *prev;		/* Other link			   */

  char *filename;		/* File in which memory was new'ed */

  uint32_t linenum;		/* Line number in above file	   */

  uint32_t datasize;		/* Size requested		   */

  uint32_t SpecialValue;		/* Underrun marker value	   */

  irem():

    next(NULL),

	prev(NULL),

	filename(0),

	linenum(0),

	datasize(0),

	SpecialValue(0)

  {}

};

extern char curr_dir[FN_REFLEN], home_dir_buff[FN_REFLEN];

extern volatile int _my_signals;

extern uint64_t query_performance_frequency, query_performance_offset;

extern sigset_t my_signals;		/* signals blocked by mf_brkhant */

} /* namespace internal */

} /* namespace drizzled */