Add linux/refcount.h wrapper

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 19 insertions, 0 deletions

diff --git a/include/linux/refcount.h b/include/linux/refcount.h
new file mode 100644
index 0000000..a59397b
--- /dev/null
+++ b/include/linux/refcount.h
@@ -0,0 +1,19 @@
+#ifndef _LINUX_REFCOUNT_H
+#define _LINUX_REFCOUNT_H
+
+#include "atomic.h"
+
+#define refcount_t atomic_t
+
+#define REFCOUNT_INIT(n)	ATOMIC_INIT(n)
+#define refcount_set(r, n)	atomic_set((r), (n))
+#define refcount_read(r)	atomic_read(r)
+#define refcount_inc(r)		atomic_inc(r)
+#define refcount_dec(r)		atomic_dec(r)
+
+static inline bool refcount_dec_and_test(refcount_t *r)
+{
+	refcount_dec(r);
+	return !refcount_read(r);
+}
+#endif