1 files changed, 54 insertions, 0 deletions
diff --git a/include/base/rwlock.h b/include/base/rwlock.h
new file mode 100644
index 00000000..2111e97b
--- /dev/null
+++ b/include/base/rwlock.h
@@ -0,0 +1,54 @@
+/** BEGIN COPYRIGHT BLOCK
+ * Copyright 2001 Sun Microsystems, Inc.
+ * Portions copyright 1999, 2001-2003 Netscape Communications Corporation.
+ * All rights reserved.
+ * END COPYRIGHT BLOCK **/
+/*
+ * rwlock.h: Shared/Exclusive lock abstraction. 
+ * 
+ * Sanjay Krishnamurthi
+ */
+#ifndef _BASE_RWLOCK_H_
+#define _BASE_RWLOCK_H_
+
+#include "netsite.h"
+#include "crit.h"
+
+NSPR_BEGIN_EXTERN_C
+
+typedef void* RWLOCK;
+
+/*
+ * rwlock_Init()
+ *  creates and returns a new readwrite lock variable. 
+ */
+NSAPI_PUBLIC RWLOCK rwlock_Init(void);
+
+/*
+ * rwlock_ReadLock()
+ */
+NSAPI_PUBLIC void rwlock_ReadLock(RWLOCK lock);
+
+/*
+ * rwlock_WriteLock()
+ */
+NSAPI_PUBLIC void rwlock_WriteLock(RWLOCK lock);
+
+/*
+ * rwlock_Unlock()
+ */
+NSAPI_PUBLIC void rwlock_Unlock(RWLOCK lock);
+
+/*
+ * rwlock_DemoteLock()
+ */
+NSAPI_PUBLIC void rwlock_DemoteLock(RWLOCK lock);
+
+/*
+ * rwlock_terminate removes a previously allocated RWLOCK variable.
+ */
+NSAPI_PUBLIC void rwlock_Terminate(RWLOCK lock);
+
+NSPR_END_EXTERN_C
+
+#endif /* _BASE_RWLOCK_H_ */