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o Debug version of the pool_grow stuff.

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This commit is contained in:
Joe Thornber 2001-12-20 12:27:41 +00:00
parent a9649e92c9
commit b5dbdbf7b2
1 changed files with 40 additions and 26 deletions
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66
lib/mm/pool-debug.c
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@ -17,7 +17,9 @@ struct block {
};
struct pool {
int object;
int begun;
struct block *object;
struct block *blocks;
struct block *tail;
};
@ -70,7 +72,7 @@ static void _append_block(struct pool *p, struct block *b)
p->blocks = p->tail = b;
}
void *pool_alloc_aligned(struct pool *p, size_t s, unsigned alignment)
static struct block *_new_block(size_t s, unsigned alignment)
{
/* FIXME: I'm currently ignoring the alignment arg. */
size_t len = sizeof(struct block) + s;
@ -84,6 +86,16 @@ void *pool_alloc_aligned(struct pool *p, size_t s, unsigned alignment)
b->next = NULL;
b->size = s;
return b;
}
void *pool_alloc_aligned(struct pool *p, size_t s, unsigned alignment)
{
struct block *b = _new_block(s, alignment);
if (!b)
return NULL;
_append_block(p, b);
return &b->data[0];
}
@ -120,47 +132,49 @@ void pool_free(struct pool *p, void *ptr)
p->blocks = p->tail = NULL;
}
void *pool_begin_object(struct pool *p, size_t init_size)
int pool_begin_object(struct pool *p, size_t init_size)
{
assert(!p->object);
pool_alloc_aligned(p, init_size, DEFAULT_ALIGNMENT);
p->object = 1;
return &p->tail->data;
assert(!p->begun);
p->begun = 1;
return 1;
}
void *pool_grow_object(struct pool *p, void *buffer, size_t delta)
int pool_grow_object(struct pool *p, const void *buffer, size_t delta)
{
struct block *old = p->tail, *new;
struct block *new;
assert(buffer == &old->data);
assert(p->begun);
if (!pool_alloc(p, old->size + delta))
return NULL;
if (!(new = _new_block(p->object->size + delta, DEFAULT_ALIGNMENT))) {
log_err("Couldn't extend object.");
return 0;
}
new = p->tail;
if (p->object) {
memcpy(&new->data, &p->object->data, p->object->size);
dbg_free(p->object);
}
p->object = new;
memcpy(&new->data, &old->data, old->size);
old->next = NULL;
pool_free(p, buffer);
_append_block(p, new);
return &new->data;
return 1;
}
void *pool_end_object(struct pool *p)
{
assert(p->object);
p->object = 0;
assert(p->begun);
_append_block(p, p->object);
p->begun = 0;
p->object = NULL;
return &p->tail->data;
}
void pool_abandon_object(struct pool *p)
{
assert(p->object);
pool_free(p, &p->tail->data);
p->object = 0;
assert(p->begun);
dbg_free(p->object);
p->begun = 0;
p->object = NULL;
}
char *pool_strdup(struct pool *p, const char *str)