/** Helper: allocate a new memarea chunk of around <b>chunk_size</b> bytes. */
static memarea_chunk_t *
alloc_chunk(size_t sz, int freelist_ok)
{
tor_assert(sz < SIZE_T_CEILING);
if (freelist && freelist_ok) {
memarea_chunk_t *res = freelist;
freelist = res->next_chunk;
res->next_chunk = NULL;
--freelist_len;
CHECK_SENTINEL(res);
return res;
} else {
size_t chunk_size = freelist_ok ? CHUNK_SIZE : sz;
memarea_chunk_t *res;
chunk_size += SENTINEL_LEN;
res = tor_malloc(chunk_size);
res->next_chunk = NULL;
res->mem_size = chunk_size - CHUNK_HEADER_SIZE - SENTINEL_LEN;
res->next_mem = res->U_MEM;
tor_assert(res->next_mem+res->mem_size+SENTINEL_LEN ==
((char*)res)+chunk_size);
tor_assert(realign_pointer(res->next_mem) == res->next_mem);
SET_SENTINEL(res);
return res;
}
}
/** Helper: allocate a new memarea chunk of around <b>chunk_size</b> bytes. */
static memarea_chunk_t *
alloc_chunk(size_t sz)
{
tor_assert(sz < SIZE_T_CEILING);
size_t chunk_size = sz < CHUNK_SIZE ? CHUNK_SIZE : sz;
memarea_chunk_t *res;
chunk_size += SENTINEL_LEN;
res = tor_malloc(chunk_size);
res->next_chunk = NULL;
res->mem_size = chunk_size - CHUNK_HEADER_SIZE - SENTINEL_LEN;
res->next_mem = res->U_MEM;
tor_assert(res->next_mem+res->mem_size+SENTINEL_LEN ==
((char*)res)+chunk_size);
tor_assert(realign_pointer(res->next_mem) == res->next_mem);
SET_SENTINEL(res);
return res;
}
