mirror of https://github.com/apache/cloudstack.git
117 lines
3.1 KiB
C
117 lines
3.1 KiB
C
/*
|
|
* Copyright (C) 2001 - 2004 Mike Wray <mike.wray@hp.com>
|
|
*
|
|
* This library is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation; either version 2.1 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This library 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 Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include "allocate.h"
|
|
|
|
/** @file
|
|
* Support for allocating memory.
|
|
* Usable from user code or kernel code (with __KERNEL__ defined).
|
|
* In user code will use GC if USE_GC is defined.
|
|
*/
|
|
|
|
#ifdef __KERNEL__
|
|
/*----------------------------------------------------------------------------*/
|
|
# include <linux/config.h>
|
|
# include <linux/slab.h>
|
|
# include <linux/string.h>
|
|
# include <linux/types.h>
|
|
|
|
# define DEFAULT_TYPE 0
|
|
# define MALLOC(n, type) kmalloc(n, type)
|
|
# define FREE(ptr) kfree(ptr)
|
|
|
|
/*----------------------------------------------------------------------------*/
|
|
#else /* ! __KERNEL__ */
|
|
|
|
# include <stdlib.h>
|
|
# include <string.h>
|
|
|
|
# define DEFAULT_TYPE 0
|
|
|
|
#ifdef USE_GC
|
|
# include "gc.h"
|
|
# define MALLOC(n, typ) GC_malloc(n)
|
|
# define FREE(ptr) (ptr=NULL)
|
|
//typedef void *GC_PTR;
|
|
//GC_PTR (*GC_oom_fn)(size_t n);
|
|
#else
|
|
# define MALLOC(n, type) malloc(n)
|
|
# define FREE(ptr) free(ptr)
|
|
#endif
|
|
|
|
/*----------------------------------------------------------------------------*/
|
|
#endif
|
|
|
|
/** Function to call when memory cannot be allocated. */
|
|
AllocateFailedFn *allocate_failed_fn = NULL;
|
|
|
|
/** Allocate memory and zero it.
|
|
* The type is only relevant when calling from kernel code,
|
|
* from user code it is ignored.
|
|
* In kernel code the values accepted by kmalloc can be used:
|
|
* GFP_USER, GFP_ATOMIC, GFP_KERNEL.
|
|
*
|
|
* @param size number of bytes to allocate
|
|
* @param type memory type to allocate (kernel only)
|
|
* @return pointer to the allocated memory or zero
|
|
* if malloc failed
|
|
*/
|
|
void *allocate_type(int size, int type){
|
|
void *p = MALLOC(size, type);
|
|
if(p){
|
|
memzero(p, size);
|
|
} else if(allocate_failed_fn){
|
|
allocate_failed_fn(size, type);
|
|
}
|
|
return p;
|
|
}
|
|
|
|
/** Allocate memory and zero it.
|
|
*
|
|
* @param size number of bytes to allocate
|
|
* @return pointer to the allocated memory or zero
|
|
* if malloc failed
|
|
*/
|
|
void *allocate(int size){
|
|
return allocate_type(size, DEFAULT_TYPE);
|
|
}
|
|
|
|
/** Free memory allocated by allocate().
|
|
* No-op if 'p' is null.
|
|
*
|
|
* @param p memory to free
|
|
*/
|
|
void deallocate(void *p){
|
|
if(p){
|
|
FREE(p);
|
|
}
|
|
}
|
|
|
|
/** Set bytes to zero.
|
|
* No-op if 'p' is null.
|
|
*
|
|
* @param p memory to zero
|
|
* @param size number of bytes to zero
|
|
*/
|
|
void memzero(void *p, int size){
|
|
if(p){
|
|
memset(p, 0, (size_t)size);
|
|
}
|
|
}
|
|
|