ObjFW  Diff

			OF_ENSURE(of_tlskey_set(numPreallocatedPagesKey,
			    (void *)numPreallocatedPages));
# endif

			page = preallocatedPages[numPreallocatedPages];

			if (numPreallocatedPages == 0) {
				of_free(preallocatedPages);
				preallocatedPages = NULL;
# if !defined(OF_HAVE_COMPILER_TLS) && defined(OF_HAVE_THREADS)
				OF_ENSURE(of_tlskey_set(preallocatedPagesKey,
				    preallocatedPages));
# endif
			}

			return page;
		}
	}

	page = of_malloc(1, sizeof(*page));
	@try {
		page->map = of_calloc(1, mapSize);
	} @catch (id e) {
		of_free(page);
		@throw e;
	}
	@try {
		page->page = mapPages(1);
	} @catch (id e) {
		of_free(page->map);
		of_free(page);
		@throw e;
	}
	of_explicit_memset(page->page, 0, pageSize);

# if !defined(OF_HAVE_COMPILER_TLS) && defined(OF_HAVE_THREADS)
	lastPage = of_tlskey_get(lastPageKey);
# endif

	size_t mapSize = OF_ROUND_UP_POW2(8, pageSize / CHUNK_SIZE) / 8;

	for (size_t i = 0; i < mapSize; i++)
		if (map[i] != 0)
			return;

	unmapPages(page->page, 1);
	of_free(page->map);

	if (page->previous != NULL)
		page->previous->next = page->next;
	if (page->next != NULL)
		page->next->previous = page->previous;

# if defined(OF_HAVE_COMPILER_TLS) || !defined(OF_HAVE_THREADS)
	if (firstPage == page)
		firstPage = page->next;
	if (lastPage == page)
		lastPage = page->previous;
# else
	if (of_tlskey_get(firstPageKey) == page)
		OF_ENSURE(of_tlskey_set(firstPageKey, page->next));
	if (of_tlskey_get(lastPageKey) == page)
		OF_ENSURE(of_tlskey_set(lastPageKey, page->previous));
# endif

	of_free(page);
}

static void *
allocateMemory(struct page *page, size_t bytes)
{
	size_t chunks, chunksLeft, pageSize, i, firstChunk;

	@try {
		for (i = 0; i < numPages; i++)
			preallocatedPages[i] = addPage(false);
	} @catch (id e) {
		for (size_t j = 0; j < i; j++)
			removePageIfEmpty(preallocatedPages[j]);

		of_free(preallocatedPages);
		preallocatedPages = NULL;

		@throw e;
	}

	numPreallocatedPages = numPages;
# if !defined(OF_HAVE_COMPILER_TLS) && defined(OF_HAVE_THREADS)