patch-2.0.16 linux/include/linux/wait.h

• Lines: 20
• Date: Sat Aug 31 16:38:17 1996
• Orig file: v2.0.15/linux/include/linux/wait.h
• Orig date: Tue Jul 19 13:10:15 1994

diff -u --recursive --new-file v2.0.15/linux/include/linux/wait.h linux/include/linux/wait.h
@@ -13,6 +13,19 @@
 	struct wait_queue * next;
 };
 
+#define WAIT_QUEUE_HEAD(x) ((struct wait_queue *)((x)-1))
+
+static inline void init_waitqueue(struct wait_queue **q)
+{
+	*q = WAIT_QUEUE_HEAD(q);
+}
+
+static inline int waitqueue_active(struct wait_queue **q)
+{
+	struct wait_queue *head = *q;
+	return head && head != WAIT_QUEUE_HEAD(q);
+}
+
 struct semaphore {
 	int count;
 	struct wait_queue * wait;