Import sources from 2011-03-30 iso image - sys/include

1 files changed, 41 insertions, 0 deletions

diff --git a/sys/include/ape/qlock.h b/sys/include/ape/qlock.h
new file mode 100755
index 000000000..efaef0401
--- /dev/null
+++ b/sys/include/ape/qlock.h
@@ -0,0 +1,41 @@
+#ifndef _PLAN9_SOURCE
+  This header file is an extension to ANSI/POSIX
+#endif
+
+#ifndef __QLOCK_H_
+#define __QLOCK_H_
+#pragma lib "/$M/lib/ape/lib9.a"
+
+#include <u.h>
+#include <lock.h>
+
+typedef struct QLp QLp;
+struct QLp
+{
+	int	inuse;
+	QLp	*next;
+	char	state;
+};
+
+typedef
+struct QLock
+{
+	Lock	lock;
+	int	locked;
+	QLp	*head;
+	QLp 	*tail;
+} QLock;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern	void	qlock(QLock*);
+extern	void	qunlock(QLock*);
+extern	int	canqlock(QLock*);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif