Use FUSE multi-threaded mode for read-only mounts

[wimlib] / src / util.h

diff --git a/src/util.h b/src/util.h
index 3292a32eb9878890efd45d43845699d536f304c8..3dfd6030be08574686a3cbb6b1d8c790775746dc 100644 (file)
--- a/src/util.h
+++ b/src/util.h
@@ -30,6 +30,29 @@
 #      define HOT
 #endif /* __GNUC__ */
 
+#ifdef WITH_FUSE
+/* 
+ * Compare-and-swap.  Equivalent to the folliwng, but executed
+ * atomically:
+ *
+ * Q tmp = *ptr;
+ * if (tmp == oval)
+ *     *ptr = nval;
+ * return tmp;
+ */
+#define atomic_inc(ptr) \
+       __sync_fetch_and_add(ptr, 1)
+
+#define atomic_dec(ptr) \
+       __sync_sub_and_fetch(ptr, 1)
+
+#define cas(ptr, oval, nval) \
+       __sync_val_compare_and_swap(ptr, oval, nval);
+
+#define cas_bool(ptr, oval, nval) \
+       __sync_bool_compare_and_swap(ptr, oval, nval);
+#endif
+
 #ifndef _NTFS_TYPES_H
 typedef uint8_t  u8;
 typedef uint16_t u16;