ObjFW  Diff

			struct page **preallocatedPages =
			    of_tlskey_get(preallocatedPagesKey);
# endif

			numPreallocatedPages--;
# if !defined(OF_HAVE_COMPILER_TLS) && defined(OF_HAVE_THREADS)
			OF_ENSURE(of_tlskey_set(numPreallocatedPagesKey,
			    (void *)numPreallocatedPages));
			    (void *)numPreallocatedPages) == 0);
# endif

			page = preallocatedPages[numPreallocatedPages];

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

			return page;
		}
	}

# if defined(OF_HAVE_COMPILER_TLS) || !defined(OF_HAVE_THREADS)
	lastPage = page;

	if (firstPage == NULL)
		firstPage = page;
# else
	OF_ENSURE(of_tlskey_set(lastPageKey, page));
	OF_ENSURE(of_tlskey_set(lastPageKey, page) == 0);

	if (of_tlskey_get(firstPageKey) == NULL)
		OF_ENSURE(of_tlskey_set(firstPageKey, page));
		OF_ENSURE(of_tlskey_set(firstPageKey, page) == 0);
# endif

	return page;
}

static void
removePageIfEmpty(struct page *page)

# 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));
		OF_ENSURE(of_tlskey_set(firstPageKey, page->next) == 0);
	if (of_tlskey_get(lastPageKey) == page)
		OF_ENSURE(of_tlskey_set(lastPageKey, page->previous));
		OF_ENSURE(of_tlskey_set(lastPageKey, page->previous) == 0);
# endif

	free(page);
}

static void *
allocateMemory(struct page *page, size_t bytes)

#if defined(HAVE_MMAP) && defined(HAVE_MLOCK) && defined(MAP_ANON) && \
    !defined(OF_HAVE_COMPILER_TLS) && defined(OF_HAVE_THREADS)
+ (void)initialize
{
	if (self != [OFSecureData class])
		return;

	if (of_tlskey_new(&firstPageKey) != 0 ||
	if (!of_tlskey_new(&firstPageKey) || !of_tlskey_new(&lastPageKey) ||
	    !of_tlskey_new(&preallocatedPagesKey) ||
	    !of_tlskey_new(&numPreallocatedPagesKey))
	    of_tlskey_new(&lastPageKey) != 0 ||
	    of_tlskey_new(&preallocatedPagesKey) != 0 ||
	    of_tlskey_new(&numPreallocatedPagesKey) != 0)
		@throw [OFInitializationFailedException
		    exceptionWithClass: self];
}
#endif

+ (void)preallocateUnswappableMemoryWithSize: (size_t)size
{

	size_t i;

	if (preallocatedPages != NULL)
		@throw [OFInvalidArgumentException exception];

	preallocatedPages = of_alloc_zeroed(numPages, sizeof(struct page));
# if !defined(OF_HAVE_COMPILER_TLS) && defined(OF_HAVE_THREADS)
	of_tlskey_set(preallocatedPagesKey, preallocatedPages);
	OF_ENSURE(of_tlskey_set(preallocatedPagesKey, preallocatedPages) == 0);
# endif

	@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]);

		free(preallocatedPages);
		preallocatedPages = NULL;

		@throw e;
	}

	numPreallocatedPages = numPages;
# if !defined(OF_HAVE_COMPILER_TLS) && defined(OF_HAVE_THREADS)
	of_tlskey_set(numPreallocatedPagesKey,
	    (void *)(uintptr_t)numPreallocatedPages);
	OF_ENSURE(of_tlskey_set(numPreallocatedPagesKey,
	    (void *)(uintptr_t)numPreallocatedPages) == 0);
# endif
#else
	@throw [OFNotImplementedException exceptionWithSelector: _cmd
							 object: self];
#endif
}