1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/netwerk/cache/nsMemoryCacheDevice.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,125 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* vim: set ts=8 sts=4 et sw=4 tw=80: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef _nsMemoryCacheDevice_h_
1.11 +#define _nsMemoryCacheDevice_h_
1.12 +
1.13 +#include "nsCacheDevice.h"
1.14 +#include "pldhash.h"
1.15 +#include "nsCacheEntry.h"
1.16 +
1.17 +
1.18 +class nsMemoryCacheDeviceInfo;
1.19 +
1.20 +/******************************************************************************
1.21 + * nsMemoryCacheDevice
1.22 + ******************************************************************************/
1.23 +class nsMemoryCacheDevice : public nsCacheDevice
1.24 +{
1.25 +public:
1.26 + nsMemoryCacheDevice();
1.27 + virtual ~nsMemoryCacheDevice();
1.28 +
1.29 + virtual nsresult Init();
1.30 + virtual nsresult Shutdown();
1.31 +
1.32 + virtual const char * GetDeviceID(void);
1.33 +
1.34 + virtual nsresult BindEntry( nsCacheEntry * entry );
1.35 + virtual nsCacheEntry * FindEntry( nsCString * key, bool *collision );
1.36 + virtual void DoomEntry( nsCacheEntry * entry );
1.37 + virtual nsresult DeactivateEntry( nsCacheEntry * entry );
1.38 +
1.39 + virtual nsresult OpenInputStreamForEntry(nsCacheEntry * entry,
1.40 + nsCacheAccessMode mode,
1.41 + uint32_t offset,
1.42 + nsIInputStream ** result);
1.43 +
1.44 + virtual nsresult OpenOutputStreamForEntry(nsCacheEntry * entry,
1.45 + nsCacheAccessMode mode,
1.46 + uint32_t offset,
1.47 + nsIOutputStream ** result);
1.48 +
1.49 + virtual nsresult GetFileForEntry( nsCacheEntry * entry,
1.50 + nsIFile ** result );
1.51 +
1.52 + virtual nsresult OnDataSizeChange( nsCacheEntry * entry, int32_t deltaSize );
1.53 +
1.54 + virtual nsresult Visit( nsICacheVisitor * visitor );
1.55 +
1.56 + virtual nsresult EvictEntries(const char * clientID);
1.57 + nsresult EvictPrivateEntries();
1.58 +
1.59 + void SetCapacity(int32_t capacity);
1.60 + void SetMaxEntrySize(int32_t maxSizeInKilobytes);
1.61 +
1.62 + bool EntryIsTooBig(int64_t entrySize);
1.63 +
1.64 + size_t TotalSize();
1.65 +
1.66 +private:
1.67 + friend class nsMemoryCacheDeviceInfo;
1.68 + enum { DELETE_ENTRY = true,
1.69 + DO_NOT_DELETE_ENTRY = false };
1.70 +
1.71 + void AdjustMemoryLimits( int32_t softLimit, int32_t hardLimit);
1.72 + void EvictEntry( nsCacheEntry * entry , bool deleteEntry);
1.73 + void EvictEntriesIfNecessary();
1.74 + int EvictionList(nsCacheEntry * entry, int32_t deltaSize);
1.75 +
1.76 + typedef bool (*EvictionMatcherFn)(nsCacheEntry* entry, void* args);
1.77 + nsresult DoEvictEntries(EvictionMatcherFn matchFn, void* args);
1.78 +
1.79 +#ifdef DEBUG
1.80 + void CheckEntryCount();
1.81 +#endif
1.82 + /*
1.83 + * Data members
1.84 + */
1.85 + enum {
1.86 + kQueueCount = 24 // entries > 2^23 (8Mb) start in last queue
1.87 + };
1.88 +
1.89 + nsCacheEntryHashTable mMemCacheEntries;
1.90 + bool mInitialized;
1.91 +
1.92 + PRCList mEvictionList[kQueueCount];
1.93 +
1.94 + int32_t mHardLimit;
1.95 + int32_t mSoftLimit;
1.96 +
1.97 + int32_t mTotalSize;
1.98 + int32_t mInactiveSize;
1.99 +
1.100 + int32_t mEntryCount;
1.101 + int32_t mMaxEntryCount;
1.102 + int32_t mMaxEntrySize; // internal unit is bytes
1.103 +
1.104 + // XXX what other stats do we want to keep?
1.105 +};
1.106 +
1.107 +
1.108 +/******************************************************************************
1.109 + * nsMemoryCacheDeviceInfo - used to call nsIVisitor for about:cache
1.110 + ******************************************************************************/
1.111 +class nsMemoryCacheDeviceInfo : public nsICacheDeviceInfo {
1.112 +public:
1.113 + NS_DECL_ISUPPORTS
1.114 + NS_DECL_NSICACHEDEVICEINFO
1.115 +
1.116 + nsMemoryCacheDeviceInfo(nsMemoryCacheDevice* device)
1.117 + : mDevice(device)
1.118 + {
1.119 + }
1.120 +
1.121 + virtual ~nsMemoryCacheDeviceInfo() {}
1.122 +
1.123 +private:
1.124 + nsMemoryCacheDevice* mDevice;
1.125 +};
1.126 +
1.127 +
1.128 +#endif // _nsMemoryCacheDevice_h_
