ndbmem.h

mysql-5.0.22.tar.gz源码包

/* Copyright (C) 2003 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; either version 2 of the License, or
   (at your option) any later version.

   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 */

#ifndef NDB_MEM_H
#define NDB_MEM_H

#include <ndb_global.h>

#ifdef	__cplusplus
extern "C" {
#endif


/**
 * NdbMem_Create 
 * Create and initalise internal data structures for Ndb
 */
void NdbMem_Create(void);


/**
 * NdbMem_Destroy
 * Destroy all memory allocated by NdbMem
 */
void NdbMem_Destroy(void);

/**
 * NdbMem_Allocate
 * Allocate size of memory
 * @parameter size - size in bytes of memory to allocate
 * @returns - pointer to memory if succesful otherwise NULL
 */
void* NdbMem_Allocate(size_t size);

/**
 * NdbMem_AllocateAlign
 * Allocate size of memory
 * @parameter size - size in bytes of memory to allocate
 * @paramter alignment - byte boundary to align the data at
 * @returns - pointer to memory if succesful otherwise NULL
 */
void* NdbMem_AllocateAlign(size_t size, size_t alignment);


/** 
 * NdbMem_Free
 *  Free the memory that ptr points to 
 *  @parameter ptr - pointer to the memory to free
 */
void NdbMem_Free(void* ptr);

/**
 * NdbMem_MemLockAll
 *   Locks virtual memory in main memory
 */
int NdbMem_MemLockAll(void);

/**
 * NdbMem_MemUnlockAll
 *   Unlocks virtual memory
 */
int NdbMem_MemUnlockAll(void);

#ifdef	__cplusplus
}
#endif

#endif