/*
* Copyright (c) 2008
* Jonathan Schleifer <js@webkeks.org>
*
* All rights reserved.
*
* This file is part of libobjfw. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE included in
* the packaging of this file.
*/
#import "config.h"
#import <stdlib.h>
#import <string.h>
#import <objc/objc-api.h>
#ifdef HAVE_OBJC_RUNTIME_H
#import <objc/runtime.h>
#endif
#import "OFObject.h"
#import "OFExceptions.h"
@implementation OFObject
- init
{
if ((self = [super init]) != nil)
__mem_pool = NULL;
return self;
}
- free
{
struct __ofobject_allocated_mem *iter, *iter2;
for (iter = __mem_pool; iter != NULL; iter = iter2) {
iter2 = iter->prev;
free(iter->ptr);
free(iter);
}
free(self);
return nil;
}
- (void*)getMemWithSize: (size_t)size
{
struct __ofobject_allocated_mem *iter;
if ((iter = malloc(sizeof(struct __ofobject_allocated_mem))) == NULL) {
[[OFNoMemException newWithObject: self
andSize: sizeof(struct
__ofobject_allocated_mem)
] raise];
return NULL;
}
if ((iter->ptr = malloc(size)) == NULL) {
free(iter);
[[OFNoMemException newWithObject: self
andSize: size] raise];
return NULL;
}
iter->next = NULL;
iter->prev = __mem_pool;
if (__mem_pool != NULL)
__mem_pool->next = iter;
__mem_pool = iter;
return iter->ptr;
}
- (void*)getMemForNItems: (size_t)nitems
ofSize: (size_t)size
{
size_t memsize;
if (size > SIZE_MAX / nitems)
[[OFOverflowException newWithObject: self] raise];
memsize = nitems * size;
return [self getMemWithSize: memsize];
}
- (void*)resizeMem: (void*)ptr
toSize: (size_t)size
{
struct __ofobject_allocated_mem *iter;
if (ptr == NULL)
return [self getMemWithSize: size];
for (iter = __mem_pool; iter != NULL; iter = iter->prev) {
if (iter->ptr == ptr) {
if ((ptr = realloc(iter->ptr, size)) == NULL)
[[OFNoMemException newWithObject: self
andSize: size] raise];
iter->ptr = ptr;
return ptr;
}
}
[[OFMemNotPartOfObjException newWithObject: self
andPointer: ptr] raise];
return NULL; /* never reached, but makes gcc happy */
}
- (void*)resizeMem: (void*)ptr
toNItems: (size_t)nitems
ofSize: (size_t)size
{
size_t memsize;
if (size > SIZE_MAX / nitems)
[[OFOverflowException newWithObject: self] raise];
memsize = nitems * size;
return [self resizeMem: ptr
toSize: memsize];
}
- freeMem: (void*)ptr;
{
struct __ofobject_allocated_mem *iter;
for (iter = __mem_pool; iter != NULL; iter = iter->prev) {
if (iter->ptr == ptr) {
if (iter->prev != NULL)
iter->prev->next = iter->next;
if (iter->next != NULL)
iter->next->prev = iter->prev;
if (__mem_pool == iter)
__mem_pool = NULL;
free(iter);
free(ptr);
return self;
}
}
[[OFMemNotPartOfObjException newWithObject: self
andPointer: ptr] raise];
return self /* never reached, but makes gcc happy */;
}
@end