1 files changed, 66 insertions, 0 deletions
diff --git a/nsprpub/pr/include/prcmon.h b/nsprpub/pr/include/prcmon.h
new file mode 100644
index 000000000..69171138b
--- /dev/null
+++ b/nsprpub/pr/include/prcmon.h
@@ -0,0 +1,66 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef prcmon_h___
+#define prcmon_h___
+
+/*
+** Interface to cached monitors. Cached monitors use an address to find a
+** given PR monitor. In this way a monitor can be associated with another
+** object without preallocating a monitor for all objects.
+**
+** A hash table is used to quickly map addresses to individual monitors
+** and the system automatically grows the hash table as needed.
+**
+** Cache monitors are about 5 times slower to use than uncached monitors.
+*/
+#include "prmon.h"
+#include "prinrval.h"
+
+PR_BEGIN_EXTERN_C
+
+/**
+** Like PR_EnterMonitor except use the "address" to find a monitor in the
+** monitor cache. If successful, returns the PRMonitor now associated
+** with "address". Note that you must PR_CExitMonitor the address to
+** release the monitor cache entry (otherwise the monitor cache will fill
+** up). This call will return NULL if the monitor cache needs to be
+** expanded and the system is out of memory.
+*/
+NSPR_API(PRMonitor*) PR_CEnterMonitor(void *address);
+
+/*
+** Like PR_ExitMonitor except use the "address" to find a monitor in the
+** monitor cache.
+*/
+NSPR_API(PRStatus) PR_CExitMonitor(void *address);
+
+/*
+** Like PR_Wait except use the "address" to find a monitor in the
+** monitor cache.
+*/
+NSPR_API(PRStatus) PR_CWait(void *address, PRIntervalTime timeout);
+
+/*
+** Like PR_Notify except use the "address" to find a monitor in the
+** monitor cache.
+*/
+NSPR_API(PRStatus) PR_CNotify(void *address);
+
+/*
+** Like PR_NotifyAll except use the "address" to find a monitor in the
+** monitor cache.
+*/
+NSPR_API(PRStatus) PR_CNotifyAll(void *address);
+
+/*
+** Set a callback to be invoked each time a monitor is recycled from the cache
+** freelist, with the monitor's cache-key passed in address.
+*/
+NSPR_API(void) PR_CSetOnMonitorRecycle(void (PR_CALLBACK *callback)(void *address));
+
+PR_END_EXTERN_C
+
+#endif /* prcmon_h___ */