Rough first cut of cache service and memory object cache. It currently builds on linux.

git-svn-id: svn://10.0.0.236/trunk@87809 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/netwerk/cache/src/nsMemoryCacheDevice.cpp

@@ -0,0 +1,119 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * The contents of this file are subject to the Mozilla Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/MPL/
+ * 
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ * 
+ * The Original Code is nsMemoryCacheDevice.cpp, released February 22, 2001.
+ * 
+ * The Initial Developer of the Original Code is Netscape Communications
+ * Corporation.  Portions created by Netscape are
+ * Copyright (C) 2001 Netscape Communications Corporation.  All
+ * Rights Reserved.
+ * 
+ * Contributor(s): 
+ *    Gordon Sheridan, 22-February-2001
+ */
+
+#include "nsMemoryCacheDevice.h"
+#include "nsICacheService.h"
+
+
+nsMemoryCacheDevice::nsMemoryCacheDevice()
+    : nsCacheDevice(kMemoryCacheID)
+{
+
+}
+
+nsMemoryCacheDevice::~nsMemoryCacheDevice()
+{
+    //** dealloc all memory
+}
+
+
+nsresult
+nsMemoryCacheDevice::Init()
+{
+    nsresult  rv;
+
+    rv = mInactiveEntries.Init();
+
+    //** read user prefs for memory cache limits
+
+    return rv;
+}
+
+
+nsresult
+nsMemoryCacheDevice::Create(nsCacheDevice **result)
+{
+    nsMemoryCacheDevice * device = new nsMemoryCacheDevice();
+    if (!device)  return NS_ERROR_OUT_OF_MEMORY;
+
+    nsresult rv = device->Init();
+    if (NS_FAILED(rv)) {
+        delete device;
+        device = nsnull;
+    }
+    *result = device;
+    return rv;
+}
+
+
+nsresult
+nsMemoryCacheDevice::ActivateEntryIfFound(nsCacheEntry * entry)
+{
+    //** get the key from the entry
+    nsCString * key = nsnull; //** = key from entry
+
+    nsCacheEntry * ourEntry = mInactiveEntries.GetEntry(key);
+    if (!ourEntry) {
+        *entry = nsnull;
+        return NS_ERROR_CACHE_KEY_NOT_FOUND;
+    }
+
+    //** need entry->UpdateFrom(ourEntry);
+    entry->MarkActive(); // so we don't evict it
+    //** find eviction element and move it to the tail of the queue
+    
+    return NS_OK;
+}
+
+
+nsresult
+nsMemoryCacheDevice::DeactivateEntry(nsCacheEntry * entry)
+{
+    nsCString * key;
+    entry->GetKey(&key);
+
+    nsCacheEntry * ourEntry = mInactiveEntries.GetEntry(key);
+    NS_ASSERTION(ourEntry, "DeactivateEntry called for an entry we don't have!");
+    if (!ourEntry)
+        return NS_ERROR_INVALID_POINTER;
+
+    //** need ourEntry->UpdateFrom(entry);
+    return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+nsresult
+nsMemoryCacheDevice::BindEntry(nsCacheEntry * entry)
+{
+    nsresult  rv = mInactiveEntries.AddEntry(entry);
+    if (NS_FAILED(rv))
+        return rv;
+
+    //** add size of entry to memory totals
+    return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+//** need stream factory methods
+
+//** need methods for enumerating entries
+
+//** need notification methods for size changes on non-streamBased entries (for eviction)