kernel/cache/block_cache.cpp

73 	void*			original_data;
105 		// the changed data is either in current_data, or original_data -- the
371 		fHasOriginal(block->original_data != NULL),
512 		_Allocate(fOriginal, block->original_data);
1267 	return block->previous_transaction != NULL && block->original_data != NULL
1268 		? block->original_data : block->current_data;
1323 		if (block->original_data != NULL && block->transaction == NULL) {
1326 			fCache->Free(block->original_data);
1327 			block->original_data = NULL;
1353 		ASSERT(block->original_data == NULL && block->parent_data == NULL);
1489 	if (block->original_data != NULL || block->parent_data != NULL) {
1491 			block->block_number, block->original_data, block->parent_data);
1541 	block->original_data = NULL;
1626 	if (block->original_data != NULL) {
1627 		Free(block->original_data);
1628 		block->original_data = NULL;
1703 		ASSERT(block->original_data == NULL && block->parent_data == NULL);
1869 			ASSERT(block->original_data == NULL && block->parent_data == NULL);
2066 	bool wasUnchanged = block->original_data == NULL
2069 	if (!(allocated && cleared) && block->original_data == NULL) {
2071 		block->original_data = cache->Allocate();
2072 		if (block->original_data == NULL) {
2074 			FATAL(("could not allocate original_data\n"));
2082 		memcpy(block->original_data, block->current_data, cache->block_size);
2140 		(addr_t)block->current_data, (addr_t)block->original_data,
2155 	kprintf(" original data: %p\n", block->original_data);
2191 	set_debug_variable("_original", (addr_t)block->original_data);
2923 		if (block->original_data != NULL) {
2924 			cache->Free(block->original_data);
2925 			block->original_data = NULL;
2969 		if (block->original_data != NULL) {
2972 			memcpy(block->current_data, block->original_data,
2974 			cache->Free(block->original_data);
2975 			block->original_data = NULL;
3052 			ASSERT(block->original_data != NULL);
3053 			cache->Free(block->original_data);
3057 				block->original_data = block->parent_data;
3060 				block->original_data = NULL;
3069 		if (block->original_data != NULL) {
3132 			if (block->original_data != NULL) {
3134 				memcpy(block->current_data, block->original_data,
3148 				cache->Free(block->original_data);
3149 				block->original_data = NULL;
3221 			if (block->original_data != NULL) {
3222 				memcpy(block->current_data, block->original_data,
3225 				cache->Free(block->original_data);
3226 				block->original_data = NULL;
3333 		*_unchangedData = block->original_data;