[haiku-commits] r35394 - haiku/trunk/src/system/kernel/vm
- From: ingo_weinhold@xxxxxx
- To: haiku-commits@xxxxxxxxxxxxx
- Date: Wed, 3 Feb 2010 19:55:52 +0100 (CET)
Author: bonefish
Date: 2010-02-03 19:55:52 +0100 (Wed, 03 Feb 2010)
New Revision: 35394
Changeset: http://dev.haiku-os.org/changeset/35394/haiku
Added:
haiku/trunk/src/system/kernel/vm/PageCacheLocker.cpp
Log:
Forgot to add this one in the previous commit: The PageCacheLocker does have
its own source file now that the page daemon source file is gone.
Added: haiku/trunk/src/system/kernel/vm/PageCacheLocker.cpp
===================================================================
--- haiku/trunk/src/system/kernel/vm/PageCacheLocker.cpp
(rev 0)
+++ haiku/trunk/src/system/kernel/vm/PageCacheLocker.cpp 2010-02-03
18:55:52 UTC (rev 35394)
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2007, Axel Dörfler, axeld@xxxxxxxxxxxxxxxxx All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include "PageCacheLocker.h"
+
+#include <vm/VMCache.h>
+
+
+bool
+PageCacheLocker::_IgnorePage(vm_page* page)
+{
+ if (page->busy || page->state == PAGE_STATE_WIRED
+ || page->state == PAGE_STATE_FREE || page->state ==
PAGE_STATE_CLEAR
+ || page->state == PAGE_STATE_UNUSED || page->wired_count > 0)
+ return true;
+
+ return false;
+}
+
+
+bool
+PageCacheLocker::Lock(vm_page* page, bool dontWait)
+{
+ if (_IgnorePage(page))
+ return false;
+
+ // Grab a reference to this cache.
+ VMCache* cache = vm_cache_acquire_locked_page_cache(page, dontWait);
+ if (cache == NULL)
+ return false;
+
+ if (_IgnorePage(page)) {
+ cache->ReleaseRefAndUnlock();
+ return false;
+ }
+
+ fPage = page;
+ return true;
+}
+
+
+void
+PageCacheLocker::Unlock()
+{
+ if (fPage == NULL)
+ return;
+
+ fPage->Cache()->ReleaseRefAndUnlock();
+
+ fPage = NULL;
+}
Other related posts:
- » [haiku-commits] r35394 - haiku/trunk/src/system/kernel/vm - ingo_weinhold
