1 files changed, 22 insertions, 0 deletions
diff --git a/src/cmd/vbackup/queue.h b/src/cmd/vbackup/queue.h
new file mode 100644
index 00000000..053346ad
--- /dev/null
+++ b/src/cmd/vbackup/queue.h
@@ -0,0 +1,22 @@
+enum
+{
+	MAXQ = 256,
+};
+
+typedef struct Queue Queue;
+struct Queue
+{
+	struct {
+		Block *db;
+		u32int bno;
+	} el[MAXQ];
+	int ri, wi, nel, closed;
+
+	QLock lk;
+	Rendez r;
+};
+
+Queue	*qalloc(void);
+void	qclose(Queue*);
+Block	*qread(Queue*, u32int*);
+void	qwrite(Queue*, Block*, u32int);