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/* Copyright (c) 2017-2018 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "memarea.h"
struct memarea {
const void *data;
size_t size;
memarea_free_callback_t *callback;
void *context;
int refcount;
};
static struct memarea memarea_empty = {
.refcount = 1,
};
#undef memarea_init
struct memarea *
memarea_init(const void *data, size_t size,
memarea_free_callback_t *callback, void *context)
{
struct memarea *area;
i_assert(callback != NULL);
area = i_new(struct memarea, 1);
area->data = data;
area->size = size;
area->callback = callback;
area->context = context;
area->refcount = 1;
return area;
}
struct memarea *memarea_init_empty(void)
{
i_assert(memarea_empty.refcount > 0);
memarea_empty.refcount++;
return &memarea_empty;
}
void memarea_ref(struct memarea *area)
{
i_assert(area->refcount > 0);
area->refcount++;
}
void memarea_unref(struct memarea **_area)
{
struct memarea *area = *_area;
*_area = NULL;
i_assert(area->refcount > 0);
if (--area->refcount > 0)
return;
i_assert(area != &memarea_empty);
area->callback(area->context);
i_free(area);
}
void memarea_free_without_callback(struct memarea **_area)
{
struct memarea *area = *_area;
*_area = NULL;
i_assert(memarea_get_refcount(area) == 1);
i_free(area);
}
unsigned int memarea_get_refcount(struct memarea *area)
{
i_assert(area->refcount > 0);
return area->refcount;
}
const void *memarea_get(struct memarea *area, size_t *size_r)
{
*size_r = area->size;
return area->data;
}
size_t memarea_get_size(struct memarea *area)
{
return area->size;
}
void memarea_free_callback_noop(void *context ATTR_UNUSED)
{
}
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