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#import "OFObject.h"
#import "OFExceptions.h"
@implementation OFObject
- init
{
if ((self = [super init]) != nil)
__mem_pool = NULL;
if ((self = [super init]) != nil) {
__memchunks = NULL;
__memchunks_size = 0;
}
return self;
}
- free
{
struct __ofobject_allocated_mem *iter, *iter2;
size_t i;
for (iter = __mem_pool; iter != NULL; iter = iter2) {
for (i = 0; i < __memchunks_size; i++)
iter2 = iter->prev;
free(iter->ptr);
free(iter);
}
struct __ofobject_allocated_mem *iter;
void *ptr, **memchunks;
size_t memchunks_size;
if (size == 0)
return NULL;
memchunks_size = __memchunks_size + 1;
if ((iter = malloc(sizeof(struct __ofobject_allocated_mem))) == NULL) {
[[OFNoMemException newWithObject: self
andSize: sizeof(struct
__ofobject_allocated_mem)
] raise];
}
if ((iter->ptr = malloc(size)) == NULL) {
free(iter);
if ((ptr = malloc(size)) == NULL) {
free(memchunks);
[[OFNoMemException newWithObject: self
andSize: size] raise];
andSize: size] raise];
}
iter->next = NULL;
iter->prev = __mem_pool;
if (__mem_pool != NULL)
__mem_pool->next = iter;
__mem_pool = iter;
return iter->ptr;
return ptr;
}
- (void*)getMemForNItems: (size_t)nitems
ofSize: (size_t)size
{
size_t memsize;
if (nitems == 0 || size == 0)
return NULL;
if (nitems > SIZE_MAX / size)
[[OFOutOfRangeException newWithObject: self] raise];
memsize = nitems * size;
return [self getMemWithSize: memsize];
}
- (void*)resizeMem: (void*)ptr
toSize: (size_t)size
{
struct __ofobject_allocated_mem *iter;
size_t i;
if (ptr == NULL)
return [self getMemWithSize: size];
if (size == 0) {
[self freeMem: ptr];
return NULL;
}
for (iter = __mem_pool; iter != NULL; iter = iter->prev) {
if (iter->ptr == ptr) {
if ((ptr = realloc(iter->ptr, size)) == NULL)
for (i = 0; i < __memchunks_size; i++) {
if (__memchunks[i] == ptr) {
if ((ptr = realloc(ptr, size)) == NULL)
[[OFNoMemException newWithObject: self
andSize: size] raise];
iter->ptr = ptr;
__memchunks[i] = ptr;
return ptr;
}
}
[[OFMemNotPartOfObjException newWithObject: self
andPointer: ptr] raise];
return NULL; /* never reached, but makes gcc happy */
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memsize = nitems * size;
return [self resizeMem: ptr
toSize: memsize];
}
- freeMem: (void*)ptr;
{
struct __ofobject_allocated_mem *iter;
void *last, **memchunks;
size_t i, memchunks_size;
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 = iter->prev;
free(iter);
for (i = 0; i < __memchunks_size; i++) {
if (__memchunks[i] == ptr) {
memchunks_size = __memchunks_size - 1;
last = __memchunks[memchunks_size];
if (__memchunks_size == 0 ||
memchunks_size > SIZE_MAX / sizeof(void*))
[[OFOutOfRangeException newWithObject: self]
raise];
if (memchunks_size == 0) {
free(ptr);
free(__memchunks);
__memchunks = NULL;
__memchunks_size = 0;
return self;
}
if ((memchunks = realloc(__memchunks,
memchunks_size * sizeof(void*))) == NULL)
[[OFNoMemException newWithObject: self
andSize:
memchunks_size]
raise];
free(ptr);
__memchunks = memchunks;
__memchunks[i] = last;
__memchunks_size = memchunks_size;
return self;
}
}
[[OFMemNotPartOfObjException newWithObject: self
andPointer: ptr] raise];
return self /* never reached, but makes gcc happy */;
}
@end
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