1 files changed, 124 insertions, 0 deletions
diff --git a/netwerk/cache/nsMemoryCacheDevice.h b/netwerk/cache/nsMemoryCacheDevice.h
new file mode 100644
index 000000000..331b04ba6
--- /dev/null
+++ b/netwerk/cache/nsMemoryCacheDevice.h
@@ -0,0 +1,124 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* vim: set ts=8 sts=4 et sw=4 tw=80: */
+/* 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 _nsMemoryCacheDevice_h_
+#define _nsMemoryCacheDevice_h_
+
+#include "nsCacheDevice.h"
+#include "PLDHashTable.h"
+#include "nsCacheEntry.h"
+
+
+class nsMemoryCacheDeviceInfo;
+
+/******************************************************************************
+ * nsMemoryCacheDevice
+ ******************************************************************************/
+class nsMemoryCacheDevice : public nsCacheDevice
+{
+public:
+    nsMemoryCacheDevice();
+    virtual ~nsMemoryCacheDevice();
+
+    virtual nsresult        Init();
+    virtual nsresult        Shutdown();
+
+    virtual const char *    GetDeviceID(void);
+
+    virtual nsresult        BindEntry( nsCacheEntry * entry );
+    virtual nsCacheEntry *  FindEntry( nsCString * key, bool *collision );
+    virtual void            DoomEntry( nsCacheEntry * entry );
+    virtual nsresult        DeactivateEntry( nsCacheEntry * entry );
+
+    virtual nsresult OpenInputStreamForEntry(nsCacheEntry *     entry,
+                                             nsCacheAccessMode  mode,
+                                             uint32_t           offset,
+                                             nsIInputStream **  result);
+
+    virtual nsresult OpenOutputStreamForEntry(nsCacheEntry *     entry,
+                                              nsCacheAccessMode  mode,
+                                              uint32_t           offset,
+                                              nsIOutputStream ** result);
+
+    virtual nsresult GetFileForEntry( nsCacheEntry *    entry,
+                                      nsIFile **        result );
+
+    virtual nsresult OnDataSizeChange( nsCacheEntry * entry, int32_t deltaSize );
+
+    virtual nsresult Visit( nsICacheVisitor * visitor );
+
+    virtual nsresult EvictEntries(const char * clientID);
+    nsresult EvictPrivateEntries();
+    
+    void             SetCapacity(int32_t  capacity);
+    void             SetMaxEntrySize(int32_t  maxSizeInKilobytes);
+
+    bool             EntryIsTooBig(int64_t entrySize);
+
+    size_t           TotalSize();
+
+private:
+    friend class nsMemoryCacheDeviceInfo;
+    enum      { DELETE_ENTRY        = true,
+                DO_NOT_DELETE_ENTRY = false };
+
+    void      AdjustMemoryLimits( int32_t  softLimit, int32_t  hardLimit);
+    void      EvictEntry( nsCacheEntry * entry , bool deleteEntry);
+    void      EvictEntriesIfNecessary();
+    int       EvictionList(nsCacheEntry * entry, int32_t  deltaSize);
+
+    typedef bool (*EvictionMatcherFn)(nsCacheEntry* entry, void* args);
+    nsresult DoEvictEntries(EvictionMatcherFn matchFn, void* args);
+
+#ifdef DEBUG
+    void      CheckEntryCount();
+#endif
+    /*
+     *  Data members
+     */
+    enum {
+        kQueueCount = 24   // entries > 2^23 (8Mb) start in last queue
+    };
+
+    nsCacheEntryHashTable  mMemCacheEntries;
+    bool                   mInitialized;
+
+    PRCList                mEvictionList[kQueueCount];
+
+    int32_t                mHardLimit;
+    int32_t                mSoftLimit;
+
+    int32_t                mTotalSize;
+    int32_t                mInactiveSize;
+
+    int32_t                mEntryCount;
+    int32_t                mMaxEntryCount;
+    int32_t                mMaxEntrySize; // internal unit is bytes
+
+    // XXX what other stats do we want to keep?
+};
+
+
+/******************************************************************************
+ * nsMemoryCacheDeviceInfo - used to call nsIVisitor for about:cache
+ ******************************************************************************/
+class nsMemoryCacheDeviceInfo : public nsICacheDeviceInfo {
+public:
+    NS_DECL_ISUPPORTS
+    NS_DECL_NSICACHEDEVICEINFO
+
+    explicit nsMemoryCacheDeviceInfo(nsMemoryCacheDevice* device)
+        :   mDevice(device)
+    {
+    }
+
+private:
+    virtual ~nsMemoryCacheDeviceInfo() {}
+    nsMemoryCacheDevice* mDevice;
+};
+
+
+#endif // _nsMemoryCacheDevice_h_