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/*
* 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);
}
}
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