typedef unsigned long int ulint;
typedef long int lint;
typedef struct rw_lock_struct rw_lock_t;
struct rw_lock_struct {
	volatile lint lock_word;
	volatile ulint reader_count;
	volatile ulint writer;
};
static inline ulint rw_lock_x_lock_func_nowait(rw_lock_t * lock,
					       const char *file_name,
					       ulint line)
{
	if (lock->reader_count == 0) {
		if (__sync_lock_test_and_set(&(lock->writer), 351) == 350) {
		      retry_x_lock:if (__sync_sub_and_fetch(&(lock->lock_word), 0x00100000)
			    == 0) {
				if (__sync_fetch_and_add
				    (&(lock->lock_word), 0x00100000) == 0)
					goto retry_x_lock;
			}
		}
	}
}

typedef struct mtr_struct mtr_t;
typedef struct buf_block_struct buf_block_t;
typedef unsigned char buf_frame_t;
struct buf_block_struct {
	rw_lock_t lock;
	struct {
	} awe_LRU_free_mapped;
};
buf_frame_t *buf_page_get_gen(ulint space, ulint offset, ulint rw_latch,
			      buf_frame_t * guess, ulint mode, const char *file,
			      ulint line, mtr_t * mtr)
{
	buf_block_t *block;
	ulint success;
	if (mode == 12) {
		if (rw_latch == 1) {
			success =
			    rw_lock_x_lock_func_nowait(&(block->lock), file,
						       line);
		}
	}
}